Magtrol WB Series User Manual page 45

Magtrol WB/PB Dynamometers
Specifications
eDDy-current DynaMoMeter operating principles
The WB Eddy-Current Dynamometers develop their full power
at high rotation speeds. The 15 Series is particularly intended
WB DynaMoMeter ratings
Rated Torque
Model
N·m
1 WB 15 140
2 WB 15 280
3 WB 15
420
4 WB 15 560
* Voltage at 20 °C is 45 volts.
Optical Speed Sensor
Each 15 Series WB Dynamometer has an optical speed sensor
with a 60-bit pulse wheel delivered as standard.
WB torque–speeD–poWer curves
The diagram below shows the characteristic curves for the 15 Series Eddy-Current Dynamometers.
1000
100
10
1
10
3
Drag Torque
De-energized
lb·ft N·m lb·in
103 1.4 12.3
206 2.8 24.7
309 4.2 37.1
413 5.6 49.5
100
Rotation Speed (rpm)
for motors which rotate at high speeds, up to 7500 rpm. The
braking torque depends on the rotation speed.
Nominal Input Inertia
kg·m² lb·ft·s²
-2 -2
5.00 × 10 3.68 × 10
-1 -2
1.00 × 10 7.37 × 10
-1 -1
1.50 × 10 1.10 × 10
-1 -1
2.00 × 10 1.47 × 10
Cooling Water Consumption
For all WB models: ≈ 30 l/kWh at ∆t = 30 °C
1000
35
Chapter 1 – Introduction
Rated Rated Max.
Power Speed Speed
kW rpm rpm
35 2390 7500
70 2390 7500
105 2390 7500
140 2390 7500
≈ 8 gal/kWh at ∆t = 86 °F (US)
2390 rpm 7500 rpm
1000
100
10
1
10,000
M AGTROL
WB 15
Excitation
Current*
A
4
7.5
10
12
(Metric)