User`s manual
38
Magtrol WB/PB DynamometersChapter 1 – Introduction
6
MAGTROL
tanDeM DynaMoMeter ratings
Tandem Specifications
* Voltage at 20 °C is 45 volts.
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.
Speed Limit for Tandem 15
Rotation Speed (rpm)
Torque (N·m)
Power (kW)
2 WB 15 + EK + 4 PB 15 (TORQUE)
2 WB 15 + EK + 2 PB 15 (TORQUE)
2 WB 15 + EK + 1 PB 15 (TORQUE)
2
WB 15 + EK + 4 PB 15 (PO
WER)
2
WB 15 + EK + 2 PB 15 (PO
WER)
2
WB 15 + EK + 1 PB 15 (PO
WER)
1000
10000
100
10
100
1000
10
1
10 100 1000
7500 rpm2390 rpm382 rpm
10,000
An electromagnetic clutch is needed for this application
which automatically switches off at the maximum speed of
the PB Powder Dynamometer and automatically switches on
at zero speed.
tanDeM operating prinCipLes
tanDeM torque–speeD–poWer Curves
The diagrams below show the characteristic curves for the 15 Series Tandem Dynamometers.
Speed Limit for Tandem 15
Rotation Speed (rpm)
Torque (N·m)
Power (kW)
4 WB 15 + EK + 4 PB 15 (TORQUE)
4 WB 15 + EK + 2 PB 15 (TORQUE)
4
WB 15 + EK + 1 PB 15 (T
ORQUE)
4
WB 15 + EK + 4 PB 15 (PO
WER)
4
WB 15 + EK + 2 PB 15 (PO
WER)
4
WB 15 + EK + 1 PB 15 (PO
WER)
1000
10,000
100
10
100
1000
10
1
10 100 1000
7500 rpm2390 rpm382 rpm
10,000
Optical Speed Sensor
Each 15 Series Tandem Dynamometer has an optical speed
sensor with a 60-bit pulse wheel delivered as standard.
Cooling Water Consumption
For all Tandem models: z 30 l/kWh at $t = 30 °C (Metric)
z 8 gal/kWh at $t = 86 °F (US)
Model
Rated Torque
Drag Torque
De-energized
Nominal Input Inertia
Rated
Power
Rated
Speed
Max.
Speed
Excitation
Current*
N·m lb·ft N·m lb·in kg·m² lb·ft·s² kW rpm rpm A
2 WB 15 + EK + 1 PB 15
300 221 8.8 77 1.77 × 10
-1
1.31 × 10
-1
70 2390 7500 7.5
2 WB 15 + EK + 2 PB 15
600 442 14.8 130 2.31 × 10
-1
1.70 × 10
-1
70 2390 7500 7.5
2 WB 15 + EK + 4 PB 15
1200 885 26.8 237 3.39 × 10
-1
2.50 × 10
-1
70 2390 7500 12
4 WB 15 + EK + 1 PB 15
300 221 11.6 102 2.77 × 10
-1
2.04 × 10
-1
140 2390 7500 12
4 WB 15 + EK + 2 PB 15
600 442 17.6 155 3.31 × 10
-1
2.44 × 10
-1
140 2390 7500 12
4 WB 15 + EK + 4 PB 15
1200 885 29.6 261 4.39 × 10
-1
3.23 × 10
-1
140 2390 7500 12
WB/PB 15