User`s manual

30
Magtrol WB/PB DynamometersChapter 1 – Introduction
6
MAGTROL
tanDeM DynaMoMeter ratings
Tandem Specifications
* Voltage at 20 °C is 30 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.
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 diagram below shows the characteristic curves for the 115 Series Tandem Dynamometers.
Speed Limit for Tandem 115
Rotation Speed (rpm)
Torque (N·m)
Power (kW)
2 WB 115 + EK + 2 PB 115 (TORQUE)
2 WB 115 + EK + 1 PB 115 (TORQUE)
2
WB 115 + EK + 2 PB 115 (PO
WER)
2
WB 115 + EK + 1 PB 115 (PO
WER)
100
1000
10
10
100
1000
10
1
10 1000100 10,000
15,000 rpm480 rpm 2865 rpm
100,000
Optical Speed Sensor
Each 115 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·ft kg·m² lb·ft·s² kW rpm rpm A
2 WB 115 + EK + 1 PB 115
100 73.7 3 26.5 4.18 × 10
-2
3.08 × 10
-2
30 2865 15,000 5
2 WB 115 + EK + 2 PB 115
200 147.5 5 44.2 5.44 × 10
-2
4.01 × 10
-2
30 2865 15,000 5
WB/PB 115