WB and PB Series Eddy-Current and Magnetic Powder Dynamometers User’s Manual
Purchase Record Please record all model numbers and serial numbers of your Magtrol equipment, along with the general purchase information. The model number and serial number can be found on either a silver identification plate or white label affixed to each unit. Refer to these numbers whenever you communicate with a Magtrol representative about this equipment.
Safety Precautions Warning! In order to minimize risks, it is of utmost importance to respect the current safety standards when planning, configuring and operating the motor test system. 1. Make sure that all Magtrol dynamometers and electronic products are earth-grounded, to ensure personal safety and proper operation. 2. Check line voltage before operating electronic equipment. 3. Make sure that dynamometers and motors under test are equipped with appropriate safety guards. Note: 4. 5. 6. 7. 8. 9. 10.
Revisions To This Manual The contents of this manual is subject to change without prior notice. Should revisions be necessary, updates to all Magtrol User’s Manuals can be found at Magtrol’s website at www.magtrol.com/support/manuals.htm. Please compare the date of this manual with the revision date on the web site, then refer to the manual’s Table of Revisions for any changes/updates that have been made since this edition.
Table of Contents Safety Precautions..........................................................................................................................i Revisions To This Manual................................................................................................................ii Revision Date..................................................................................................................................................................ii Table of Contents.................
Table of Contents Magtrol WB/PB Dynamometers 3.3 Closed-circuit Cooling Systems............................................................................................................... 60 3.3.1 Example..................................................................................................................................................... 60 3.4 cooling Water Issues..............................................................................................................................
Magtrol WB/PB Dynamometers Table of Contents Table of Figures 2. Installation / Mounting Figure 2–1 WB/PB 2.7 Load Cell Locking System.....................................................................................................42 Figure 2–2 WB/PB 43 Load Cell Locking System......................................................................................................43 Figure 2–3 WB/PB 65 Load Cell Locking System...............................................................................
Preface Purpose of this manual This manual contains information required for the installation and general use of Magtrol’s WB Series and PB Series Dynamometers. To achieve maximum capability and ensure proper use, please read this manual in its entirety before operating. Keep the manual in a safe place for quick reference whenever a question should arise.
Preface Magtrol WB/PB Dynamometers Conventions used in this manual The following symbols and type styles may be used in this manual to highlight certain parts of the text: Note: Caution : This is intended to draw the operator’s attention to complementary information or advice relating to the subject being treated. It introduces information enabling the correct and optimal functioning of the product to be obtained.
1. Introduction 1.1 General Description The WB and PB Dynamometers manufactured by Magtrol are used for testing all types of motors and rotational systems, and measuring their torque and power according to their speed. They have been specially designed for integration in a complete motor testing system. The WB Series Dynamometers feature Eddy-current braking systems and are able to be operated at high speeds. However, as their braking torque is proportional to their speed, they cannot be used at low speeds.
Chapter 1 – Introduction 1.2 Magtrol WB/PB Dynamometers Data sheets 1.2.1 M AGTROL WB/PB 2.7 Data Sheet WB/PB 2.7 Series WB/PB 2.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 2.7 single DYnaMoMeter ConFigurations The Dynamometers can be complemented by various electronic modules such as the DES 310 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP6001 High Speed Programmable Dynamometer Controller.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB 2.7 eDDY-current DYnaMoMeter operating principLes The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 2.7 Series is particularly intended for motors which rotate at high speeds, up to 50,000 rpm. The braking torque depends on the rotation speed. WB DYnaMoMeter ratings Rated Torque Model N·m oz·in Max.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications PB 2.7 poWDer DYnaMoMeter operating principLes The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Dimensions WB/PB 2.7 DYnaMoMeters With cooling circuit T (removable calibration arm) A E B C F *Calibration in N·m with weight in kg FF 102 mm (for N·m)* ØD V S Tapping for calibration arm ØKK R EXCITATION TORQUE SPEED Y Q L ØK M Z N P H J Cooling water connection Ø 6 mm ( 0.24 in) NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model 1 WB 2.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Dimensions PB 2.7 DYnaMoMeters Without cooling circuit A T (removable calibration arm) B F C FF 102 mm (for N·m)* *Calibration in N·m with weight in kg E ØD V Tapping for calibration arm S ØKK R EXCITATION TORQUE SPEED Q L ØK M Z N H J P NOTE: Original dimensions are in Metric units. Dimensions converted to English units have been rounded up to 2 decimal places. Model 1 PB 2.7-8 2 PB 2.7-8 4 PB 2.7-8 Model 1 PB 2.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Ordering Information DYnaMoMeter options WB/PB 2.7 DYnaMoMeter MoDels High Speed (HS) Eddy-Current For testing small/miniature high-speed motors, Magtrol offers a WB 2.7 Eddy-Current Dynamometer with speed ranges up to 70,000 rpm. 1 WB 2.7-8K 2 WB 2.7-8K 3 WB 2.7-8K 4 WB 2.7-8K Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers 1.2.2 M AGTROL WB/PB 43 S eries WB/PB 43 Data Sheet WB/PB 43 Series Eddy-Current and Powder Dynamometers Features • • • • • • • • • • 4 Models with Maximum Torque from 1.5 N·m to 10 N·m (1.1 lb·ft to 7.3 lb·ft) Braking Power: 0.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 43 single DYnaMoMeter ConFigurations The Dynamometers can be complemented by various electronic modules such as the DES 310 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP6001 High Speed Programmable Dynamometer Controller.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB 43 eDDY-current DYnaMoMeter operating principLes The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 43 Series is particularly intended for motors which rotate at high speeds, up to 50,000 rpm. The braking torque depends on the rotation speed. WB DYnaMoMeter ratings Rated Torque Model N·m lb·ft Drag Torque De-energized mN·m Nominal Input Inertia oz·in Max.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications PB 43 poWDer DYnaMoMeter operating principLes The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB/PB 43 single DYnaMoMeter DiMensions A T (removable calibration arm) *Use outer groove to achieve calibration in N·m when using weight in kg B C Tapping for calibration arm Center hole DIN 232-D M4 255 mm (for N·m)* 250 mm (for mkp) X ØU ØD W E V S F EXCITATION Inlet TORQUE ØK SPEED R Y Q Z M G H L N P Reference surface J Cooling water connection Ø 10 mm ( 0.39 in) NOTE: Original dimensions are in Metric units.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 43 tanDeM operating prinCipLes Because the characteristics of the WB and PB dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 43 TAnDeM DiMensions DRIVE SIDE A E BB WB 43 F T (removable calibration arm) Electromagnetic tooth clutch (EK) * Use outer groove to achieve calibration in N·m when using weight in kg 255 mm (for N·m)* AA 250 mm (for mkp) PB 43 X V ØD W EXCITATION TORQUE SPEED EXCITATION TORQUE S R CLUTCH Y Inlet DD G L Q Inlet CC ØK GG H M J N P Cooling water connection Ø 10 mm ( 0.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Ordering Information WB/PB 43 DYnaMoMeter options High Speed (HS) Mechanical Rotor Blocking Device (MB) For testing small/miniature high-speed motors, Magtrol offers a WB 43 Eddy-Current Dynamometer with speed ranges up to 65,000 rpm. A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers 1.2.2 M AGTROL WB/PB 65 S eries WB/PB 65 Data Sheet WB/PB 65 Series Eddy-Current and Powder Dynamometers Features • • • • • • • • • • 4 Models with Maximum Torque from 10 N·m to 50 N·m (7.3 lb·ft to 36 lb·ft) Braking Power: 1.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 65 single DYnaMoMeter ConFigurations The Dynamometers can be complemented by various electronic modules such as the DES 311 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP6001 High Speed Programmable Dynamometer Controller.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB 65 eDDY-current DYnaMoMeter operating principLes The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 65 Series is particularly intended for motors which rotate at high speeds, up to 30,000 rpm. The braking torque depends on the rotation speed. WB DYnaMoMeter ratings Rated Torque Model N·m Drag Torque De-energized lb·ft N·m Nominal Input Inertia lb·in kg·m² lb·ft·s² 10-3 1 WB 65 10 7.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications PB 65 poWDer DYnaMoMeter operating principLes The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB/PB 65 single DYnaMoMeter DiMensions T (removable calibration arm) A *Use outer groove to achieve calibration in N·m when using weight in kg 510 mm (for N·m)* X B 500 mm (for mkp) C ØU Tapping for calibration arm Center hole DIN 332-D M5 V ØD W S F E ØK EXCITATION INLET TORQUE R SPEED Y Q Z M N G H L P Reference surface J Cooling water connection Ø 10 mm ( 0.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 65 tanDeM operating prinCipLes Because the characteristics of the WB and PB Dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 65 TAnDeM DiMensions DRIVE SIDE Electromagnetic tooth clutch (EK) T (removable calibration arm) * Use outer groove to achieve calibration in N·m when using weight in kg 510 mm (for N·m)* A AA BB WB 65 500 mm (for mkp) X PB 65 F V ØD W R EXCITATION INLET TORQUE SPEED INLET EXCITATION TORQUE S SPEED QQ Y Reference surface DD ØK G CC L EE M GG N P L H J Cooling water connection Ø 10 mm ( 0.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Ordering Information WB/PB 65 DYnaMoMeter options High Speed (HS) Mechanical Rotor Blocking Device (MB) For testing small/miniature high-speed motors, Magtrol offers a WB 65 Eddy-Current Dynamometer with speed ranges up to 50,000 rpm. A mechanical rotor blocking device, which allows locked rotor testing, is available for the WB Dynamometer.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers 1.2.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 115 single DynaMoMeter ConFigurations The Dynamometers can be complemented by various electronic modules such as the DES 311 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP6001 High Speed Programmable Dynamometer Controller.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB 115 eDDy-current DynaMoMeter operating principLes The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 115 Series is particularly intended for motors which rotate at high speeds, up to 22,000 rpm. The braking torque depends on the rotation speed. WB DynaMoMeter ratings Model Drag Torque De-energized Rated Torque N·m lb·ft N·m lb·in Nominal Input Inertia Max.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications PB 115 poWDer DynaMoMeter operating principLes The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB/PB 115 single DynaMoMeter DiMensions T (removable calibration arm) A B * Use outer groove to achieve calibration in N·m when using weight in kg 510 mm (for N·m)* C X 500 mm (for mkp) ØU Tapping for calibration arm Center hole DIN 332-D M8 V F W ØD S R E INLET EXCITATION TORQUE Y SPEED Q ØK Z L DD M N G P H Reference surface SS Cooling water connection Ø 15 mm ( 0.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 115 tanDeM operating prinCipLes Because the characteristics of the WB and PB dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 115 TAnDeM DiMensions DRIVE SIDE T (removable calibration arm) Electromagnetic tooth clutch (EK) A 510 mm (for N·m)* AA BB WB 115 X 500 mm (for mkp) PB 115 * Use outer groove to achieve calibration in N·m when using weight in kg F ØD V W E S R Inlet Inlet Q Y DD G CC L GG EE M H ØK N P J Cooling water connection Ø 15 mm ( 0.59 in) NOTE: Original dimensions are in Metric units.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Ordering Information DynaMoMeter options WB/PB 115 DynaMoMeter MoDels Industrial Version (IS) Eddy-Current 1 WB 115 2 WB 115 Single WB and PB Dynamometers are also available in an industrial version which includes bearing supports, but does not provide a base plate, or torque and speed measurement.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers 1.2.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers System Configurations WB/PB 15 single DynaMoMeter ConFigurations The Dynamometers can be complemented by various electronic modules such as the DES 311 Power Supply, TSC 401 Torque/ Speed Conditioner and DSP6001 High Speed Programmable Dynamometer Controller.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB 15 eDDy-current DynaMoMeter operating principLes The WB Eddy-Current Dynamometers develop their full power at high rotation speeds. The 15 Series is particularly intended for motors which rotate at high speeds, up to 7500 rpm. The braking torque depends on the rotation speed. WB DynaMoMeter ratings Model Rated Torque Drag Torque De-energized N·m N·m Rated Speed Max.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications PB 15 poWDer DynaMoMeter operating principLes The PB Powder Dynamometers contain, as their name suggests, a magnetic powder. The electrical current passing through the coil generates a magnetic field, which changes the property of the powder, thus producing a smooth braking torque through friction between rotor and stator. The Powder Dynamometers (PB) produce their rated torque at zero speed.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Specifications WB/PB 15 single DynaMoMeter DiMensions T (removable calibration arm) X 510 mm (for N·m)* A B * Use outer groove to achieve calibration in N·m when using weight in kg 500 mm (for kpm) C ØU Tapping for calibration arm Center hole DIN 332-D M16 F ØD V W S E R Inlet Q Y TT Z DD L ØK G H M N J Cooling water connection Ø 22 mm ( 0.87 in) SS P NOTE: Original dimensions are in Metric units.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 15 tanDeM operating prinCipLes Because the characteristics of the WB and PB dynamometers are complementary, Magtrol is able to offer them mounted in a tandem setup. Each dynamometer (WB and PB) can autonomously operate according to its own characteristics.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Tandem Specifications WB/PB 15 TAnDeM DiMensions DRIVE SIDE Electromagnetic tooth clutch (EK) A BB WB 15 ØD T (removable calibration arm) X AA * Use outer groove to achieve calibration in N·m when using weight in kg 510 mm (for N·m)* PB 15 500 mm (for mkp) F V W S R Inlet Inlet Q Y DD G L CC H EE GG JJ J ØK M N P HH Cooling water connection Ø 22 mm ( 0.87 in) NOTE: Original dimensions are in Metric units.
Chapter 1 – Introduction Magtrol WB/PB Dynamometers Ordering Information DynaMoMeter options WB/PB 15 DynaMoMeter MoDels Industrial Version (IS) Eddy-Current 1 WB 15 2 WB 15 3 WB 15 4 WB 15 Single WB and PB Dynamometers are also available in an industrial version which includes bearing supports, but does not provide a base plate, or torque and speed measurement. Vertical Mounting (V) Vertical Mounting is available on the Eddy-Current (WB) Dynamometer only.
2. Installation / Mounting The dynamometer lifespan (before overhauling) may vary from a few months to a few decades, depending on the application, but equally depending on the way it has been mounted. By mounting the dynamometer as described in the following sections, the operating life as well as the measuring precision of the unit may be increased considerably. 2.
Chapter 2 – Installation / Mounting 2.1.1 Magtrol WB/PB Dynamometers WB/PB 2.7 Series Before mounting any WB/PB 2.7 Series Dynamometer to the test bench, the load cell must first be unlocked. The shipping/restraining pin of the locking system is found on the lower part of the brake. Proceed as follows and refer to figure 2–1 to unlock the dynamometer: 1. Loosen the fixing screw . 2. Remove the shipping/restraining pin , and re-insert it with the thinner part inside. 3. Tighten the screw .
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 2.1.2 WB/PB 43 Series WB/PB 43 Series Dynamometers are fitted with a connecting screw between the stator assembly and the load cell. After installing the dynamometer on a test bench, fasten the connecting screw to get the load cell operational. Proceed as follows and refer to figure 2–2: While tightening the screw , keep the wrench parallel to the Caution: vertical connecting rod to avoid load cell overload. 1.
Chapter 2 – Installation / Mounting 2.1.3 Magtrol WB/PB Dynamometers WB/PB 65 Series WB/PB 65 Series Dynamometers are fitted with a mechanical stator assembly locking device protecting the load cell during transport. After installing the dynamometer on the test bench, proceed as follows and refer to figure 2–3 to unlock the system: 1. Loosen the two nuts . 2. Unscrew the two screws with three turns. 3. Tighten the two nuts .
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 2.1.4 WB/PB 115 Series WB/PB 115 Series Dynamometers are fitted with a mechanical stator assembly locking device protecting the load cell during transport. After installing the dynamometer on the test bench, proceed as follows and refer to figure 2–4 to unlock the system: 1. Loosen the two nuts . 2. Unscrew the two screws with three turns. 3. Tighten the two nuts .
Chapter 2 – Installation / Mounting 2.1.5 Magtrol WB/PB Dynamometers WB/PB 15 Series WB/PB 15 Series Dynamometers are fitted with a mechanical stator assembly locking device protecting the load cell during transport. After installing the dynamometer on the test bench, proceed as follows and refer to figure 2–5 to unlock the system: 1, Screw the nuts on each side of the dynamometer with three turns. 2, Unscrew the nuts on each side of the dynamometer until they touch the nuts .
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 2.2 Mounting the dynamometer to the test bench The dynamometer should be placed on a stable horizontal base plate—preferably constructed of cast iron, steel or aluminum—in order to eliminate vibrations to the greatest extend possible. Flatness defects should not exceed 0.05 mm. In addition, the dynamometer frame must withstand the torque transmitted by the dynamometer without deformation.
Chapter 2 – Installation / Mounting 2.3 Magtrol WB/PB Dynamometers Couplings The dynamometer couplings used with the motor under test is an important factor to take into consideration. In fact, a coupling which is not correctly specified for the application will lead to measuring errors and premature wear of the dynamometer. Given the fact that the dynamometer is a precision measuring device, high quality couplings should be used.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 2.4 Measuring range As with most transducers, dynamometers should be operated in the upper part of their measuring range, between 10% and 100% of their rating. 2.5 Drag torque Magtrol dynamometers are characterized by a low drag torque: approximately 1% of the rated torque for WB Series Dynamometers and approximately 2% for PB Series Dynamometers. Refer to the corresponding data sheets (see Section 1.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers By slightly moving the dynamometer stator backwards and forwards when the motor is stopped, the side load disappears. If uncoupling the dynamometer makes the drag torque disappear, either the coupling will have to be changed or it will have to be realigned with the motor. Caution: The dynamometer must be uncoupled prior to calibration. (Refer Chapter 6 – Calibration for more details.) to 2.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers Figure 2–7 shows a good example of a protective system. All parts of the bench are accessible, but the covers prevent any risk to the user when closed.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 2.9 Power/Heat dissipation All Magtrol WB/PB Series Dynamometers are instruments which absorb energy. They convert the kinetic energy of the coupled rotating systems into heat. The quantity of heat which can be dissipated by the dynamometers is not infinite. Additionally, the dynamometers cannot resist excessive temperatures without damage.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 320 rpm 3000 rpm 4 PB 2.7-8 (TORQUE) 2 PB 2.7-8 (TORQUE) 1000 1000 power (W) (P O W ER ) torque (mn·m) 1 PB 2.7-8 (TORQUE) 100 10 10 Speed Limit for PB 4 100 PB 2. 7- 8 ) ER W O ) (P ER 8 W 7 O 2. (P 8 PB 7 2 2. PB 1 100 1000 10 100,000 10,000 rotation speed (rpm) Figure 2–9 PB 2.7 Ratings Curve 1 10 1 ) UE RQ ) UE RQ W 1 0.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 955 rpm 100 10 4000 rpm 2 PB 43 (TORQUE) 10 1 Power (kW) Torque (N·m) 1 PB 43 (TORQUE) ) ER B 2P 43 ( 0.1 ) ER Speed Limit for PB 1 W PO OW P 3( 4 B 1P 0.1 10 100 1000 0.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 570 rpm 100 3000 rpm 10 2 PB 65 (TORQUE) 1 PB 65 (TORQUE) Power (kW) 1 Torque (N·m) 10 ) ER 2 PB 1 PB 65 ( 65 ( ) ER W PO 0.1 Speed Limit for PB 1 W PO 0.1 10 100 1000 0.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 480 rpm 1000 3000 rpm 10 2 PB 115 (TORQUE) 1 PB 115 (TORQUE) Power (kW) 1 11 1 PB 11 2 5 Speed Limit for PB (P PB 0.1 O W 5 10 ER ) (P O W ER ) Torque (N·m) 100 1 1 10 100 1000 0.
Chapter 2 – Installation / Mounting Magtrol WB/PB Dynamometers 382 rpm 10,000 2000 rpm 100 4 PB 15 (TORQUE) 1000 10 power (kW) torque (n·m) 2 PB 15 (TORQUE) ER ) 1 PB 15 (TORQUE) ) ER O W (P O W Speed Limit for PB ER ) 1 1 PB 15 2 (P PB 15 4 PB 15 (P O W 100 10 10 10 100 rotation speed (rpm) Figure 2–17 PB 15 Ratings Curve 57 1000 0.
3. Cooling 3.1 Dynamometer Cooling Proper cooling of the dynamometer is essential to ensure a long operating life and accurate measuring results. All Magtrol WB/PB Series Dynamometers* are water-cooled to guaranty the best possible heat dissipation. * Note: PB 2.7 Series Dynamometers are available with (K) or without a cooling circuit. 3.1.1 Connections Note: The cooling tubes must have an inside diameter in accordance with the indications on the corresponding dynamometer data sheets (see Section 1.2).
Chapter 3 – Cooling Magtrol WB/PB Dynamometers 3.2 Open-circuit Cooling Systems In an open-circuit cooling system, the necessary water comes directly from the main water distribution system (faucet), passes through the dynamometer, and is then disposed of (down a drain). The advantage of this type of system is its low installation cost. This solution is acceptable if there are no restrictions on water supply and if the available water is clean. 3.2.
Chapter 3 – Cooling 3.3 Magtrol WB/PB Dynamometers Closed-circuit Cooling Systems The closed-circuit cooling system uses water-to-air or water-to-water heat exchangers, or a chiller. This system is used when the water supply is restricted or when the water cannot be used for cooling without prior treatment/filtering. Note: 3.3.1 It is recommended to use water specific additives to avoid proliferation of living organisms, and to protect against corrosion and mineral deposits.
Chapter 3 – Cooling Magtrol WB/PB Dynamometers 3.4 cooling Water Issues Despite the fact that water is necessary for cooling, it represents a risk. Rust, corrosion, erosion and scale deposits have a negative effect on the functioning of the dynamometer. 3.4.1 Impurities As a matter of fact, running water may contain dust; mud; calcium or magnesium carbonates; calcium or magnesium sulfates; silicates; iron; carbons; sulfides or algae; and other fungi.
Chapter 3 – Cooling Magtrol WB/PB Dynamometers °dH °THfr °eH °THus = German hardness degree = French hardness degree = English hardness degree = American hardness degree = 10 mg CaO/liter = 10 mg CaCO3/liter = 1 grain CaCO3/gallon = 1 mg CaCO3/liter (ppm) 1 °dH = 1.79 °THfr = 1.25 °eH = 17.9 °THus Caution: Never use demineralized water for the cooling of dynamometers as this water is aggressive and leads to corrosion due to a high content of free carbon dioxide. 3.4.
Chapter 3 – Cooling Magtrol WB/PB Dynamometers 3.4.6 Condensation Caution: When the dynamometer is at a standstill, the cooling water must be turned off. This reduces the level of scale deposits and, even more important, avoids condensation. As a general rule, condensation occurs in the dynamometer when the outlet temperature of the cooling water is lower than the ambient temperature in the room.
4. Connections / Configuration 4.1 Connection to Magtrol Motor Testing Electronics The connection and configuration of the Magtrol DES Power Supply, TSC Torque/Speed Conditioner and DSP Dynamometer Controller are described in the corresponding User's Manuals for each unit. These manuals can be found on Magtrol's User Manual CD-ROM (delivered with your dynamometer) and can also be accessed at Magtrol's Web site: www.magtrol.com.
Chapter 4 – Connections / Configuration Magtrol WB/PB Dynamometers 4.1.2 PC-based Test Configuration For enhanced motor testing capabilities and full data acquisition, Magtrol offers a complete system which includes a DSP High-Speed Programmable Dynamometer Controller and M-TEST Motor Testing Software. Communication between the DSP Controller and PC running the M-TEST Software is carried out by a GPIB or RS-232 interface board and corresponding connection cable.
Chapter 4 – Connections / Configuration Magtrol WB/PB Dynamometers 4.2 Tandem Dynamometer Configuration The tandem configuration combines the advantages of both the WB Eddy-current and PB magnetic powder dynamometers by coupling them in series.
Chapter 4 – Connections / Configuration Magtrol WB/PB Dynamometers 4.2.2 Transformer Connection A transformer converts the power supplied by the DES into a 24 V DC current, in order to energize the electromagnetic clutch. The connecting cable between the DES Power Supply and the transformer is already connected to the transformer terminals 1 (brown lead) and 2 (blue lead). The yellow/green lead is to be connected to the GND.
Chapter 4 – Connections / Configuration 4.3 Magtrol WB/PB Dynamometers Connection to non-Magtrol electronic control units Caution: Use extreme caution when using electronic control units not provided by Magtrol. Magtrol motor testing electronics are fitted with safety devices such as fuses, current limiters, thermostats, etc. preventing the dynamometers from operating outside of their limits. Magtrol WB/PB Dynamometers are fitted with two types of connectors. The WB/PB 2.
Chapter 4 – Connections / Configuration Magtrol WB/PB Dynamometers 1. 2. 3. 4. N/C N/C Supply + Supply – Figure 4–7 Connector Pin Configuration for WB/PB 2.7 Dynamometer Power 1. 2. 3. 4. Temperature A Temperature B Supply + Supply – Figure 4–8 Connector Pin Configuration for WB/PB 43 Dynamometer Power and Temperature Measurement $ A. B. C. D.
Chapter 4 – Connections / Configuration 4.3.2 Magtrol WB/PB Dynamometers Torque Signal Connection The torque signal is supplied by a load cell fitted with a bridge strain gauge. 1. 2. 3. 4. 5. 6. Signal + N/C Signal – Supply + N/C Supply – Figure 4–10 Connector Pin Configuration for WB/PB 2.7 and 43 Dynamometer Torque Signals Note: The use of shielded cable is mandatory. Connect cable shielding to the connector housing. %!" $# A B. C. D. E.
Chapter 4 – Connections / Configuration Magtrol WB/PB Dynamometers 4.3.3 Speed Signal Connection Speed measuring requires a 5 V supply. The square TTL type output signal frequency is proportional to the speed. According to the polar wheel mounted on the system, the pulse number (per revolution) will be 30, 60, 600 or 6000. For additional information on this item, refer to the dynamometer's corresponding data sheet in Section 1.2.
5. Operating Principles 5.1 Eddy-current dynamometers (WB) Magtrol Eddy-current Dynamometers carry the designation of "WB" which stands for "WirbelstromBremse" in German (Wirbelstrom = Eddy-current, bremse = brake). Eddy-currents are circular currents induced in conductors crossing a magnetic field. These currents generate electromagnetic forces acting against the movement of the rotor. In the WB Eddy-current Dynamometer, the moving part is a toothed cylindrical rotor.
6. Calibration Every new Magtrol WB/PB Series Dynamometer is factory calibrated. Static calibration of the zero and torque is recommended from time to time, especially after having maintenance performed. Note: Do not forget to unlock the dynamometer following transport (after it returns from overhaul) in accordance with Section 2.1 – Locking the Dynamometer for Transport. 6.
Chapter 6 – Calibration 6.1.2 Magtrol WB/PB Dynamometers Calibration Weight The calibration weight is determined by dynamometer model, according to the table below. Note: Use outer groove to achieve calibration in N·m when using weight in kg. Model 1 WB 2.7-8 K 2 WB 2.7-8 K 3 WB 2.7-8 K 4 WB 2.7-8 K 1 PB 2.7-8 K 2 PB 2.7-8 K 4 PB 2.
Chapter 6 – Calibration Magtrol WB/PB Dynamometers 6.2 Calibration with Magtrol Motor Testing Electronics When standard Magtrol motor testing electronics are used in the test bench (Magtrol DSP Controller and TSC Torque/Speed Conditioner), the calibration procedure as described in the TSC 401 Instruction Manual should be followed. Refer to Section 3 – Calibration for dynamometer calibration. Note: 6.3 The User's Manuals for all Magtrol products can be accessed/ downloaded from Magtrol's web site: www.
Chapter 6 – Calibration Magtrol WB/PB Dynamometers Caution: 6.4.1 For overload calibration of WB/PB 43, 65 and 115 Series Dynamometers, readings of 150% of the nominal torque are only possible if the measuring system operates without saturation.
Chapter 6 – Calibration Magtrol WB/PB Dynamometers 6.4.2 WB/PB 65 Series Figure 6–3 WB/PB 65 Overload Protection Calibration 1. Mount the calibration arms. (See Section 6.1.1 – Calibration Arms.) 2. Place 100% of the calibration weight on the arm on the connector side. 3. Loosen the nut and adjust the screw to decrease the torque slightly. 4. Place 200% of the calibration weight on the arm on the connector side. 5.
Chapter 6 – Calibration 6.4.3 Magtrol WB/PB Dynamometers WB/PB 115 Series Figure 6–4 WB/PB 115 Overload Protection Calibration 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Mount the calibration arms. (See Section 6.1.1 – Calibration Arms.) Place 100% of the calibration weight on the arm on the connector side. Loosen the nut and adjust the screw to decrease the torque slightly. Place 200% of the calibration weight on the arm on the connector side.
7. Maintenance and Repair 7.1 Maintenance Just like any rotating equipment, Magtrol dynamometers require periodic maintenance. It is recommended that maintenance be performed every 5000 hours of normal operation. This corresponds to the theoretical life of the bearings and the time after which Magtrol recommends their replacement. (Bearings should be replaced as soon as they start showing signs of wear.) Higher wear occurs when the dynamometer is operated outside its optimal working conditions.
Magtrol Limited Warranty Magtrol, Inc. warrants its products to be free from defects in material and workmanship under normal use and service for a period of twenty-four (24) months from the date of shipment. Software is warranted to operate in accordance with its programmed instructions on appropriate Magtrol instruments.
Service Information Returning Magtrol equipment for Repair and/or Calibration Before returning equipment to Magtrol for repair and/or calibration, please visit Magtrol’s Web site at http://www.magtrol.com/support/rma.htm to begin the Return Material Authorization (RMA) process. Depending on where the equipment is located and which unit(s) will be returned, you will be directed to either ship your equipment back to Magtrol, Inc. in the United States or Magtrol SA in Switzerland.
Testing, Measurement and Control of Torque-Speed-Power • Load-Force-Weight • Tension • Displacement Magtrol Inc 70 Gardenville Parkway Buffalo, New York 14224 USA Phone: +1 716 668 5555 Fax: +1 716 668 8705 E-mail: magtrol@magtrol.com Magtrol SA Centre technologique Montena 1728 Rossens / Fribourg, Switzerland Phone: +41 (0)26 407 3000 Fax: +41 (0)26 407 3001 E-mail: magtrol@magtrol.ch www.magtrol.
