Magtrol WB Series User Manual page 21

Magtrol WB/PB Dynamometers
Specifications
eDDY-current DYnaMoMeter operating principles
The WB Eddy-Current Dynamometers develop their full power
at high rotation speeds. The 43 Series is particularly intended
WB DYnaMoMeter ratings
Rated Torque
Model
N·m lb·ft
1 WB 43
1.5
2 WB 43 3.0
* Voltage at 20 °C is 24 volts.
Optical Speed Sensor
Each 43 Series WB Dynamometer has an optical speed sensor
with a 30-bit pulse wheel delivered as standard.
WB torque–speeD–poWer curves
The diagram below shows the characteristic curves for the 43 Series Eddy-Current Dynamometers.
10
1
0.1
100
3
Drag Torque
Nominal Input Inertia
De-energized
mN·m oz·in kg·m²
1.1 15 2.12 1.21 × 10
2.2 30 4.24 2.17 × 10
1000
for motors which rotate at high speeds, up to 50,000 rpm. The
braking torque depends on the rotation speed.
Rated
Power
lb·ft·s² kW
-4 -5
8.92 × 10 1.5
-4 -4
1.60 × 10 3
Cooling Water Consumption
For all WB models: ≈ 30 l/kWh at ∆t = 30 °C
9550 rpm
10,000
Rotation Speed (rpm)
11
Chapter 1 – Introduction
Max. Speed
Rated
standard high-speed
Speed
version version (HS)
rpm rpm rpm
9550 50,000 65,000
9550 50,000 65,000
≈ 8 gal/kWh at ∆t = 86 °F (US)
50.000 rpm
100,000
M AGTROL
WB 43
Excitation
Current*
A
1
2
(Metric)
10
1
0.1