35
Magtrol WB/PB Dynamometers
Chapter 1 – Introduction
3
MAGTROL
Specifications
WB DynaMoMeter ratings
The WB Eddy-Current Dynamometers develop their full power
at high rotation speeds. The 15 Series is particularly intended
* Voltage at 20 °C is 45 volts.
for motors which rotate at high speeds, up to 7500 rpm. The
braking torque depends on the rotation speed.
eDDy-current DynaMoMeter operating principles
WB torque–speeD–poWer curves
The diagram below shows the characteristic curves for the 15 Series Eddy-Current Dynamometers.
100
1000
10
1
100
1000
10
1
10
100
1000
7500 rpm
2390 rpm
10,000
Speed Limit f
or
WB
Rotation Speed (rpm)
To
rque (N·m
)
Po
wer (kW
)
4 WB 15 (T
ORQUE)
3 WB 15 (T
ORQUE)
2 WB 15 (T
ORQUE)
1 WB 15 (T
ORQUE)
4
WB 15 (PO
WER)
3
WB 15 (PO
WER)
2
WB 15 (PO
WER)
1
WB 15 (PO
WER)
Optical Speed Sensor
Each 15 Series WB Dynamometer has an optical speed sensor
with a 60-bit pulse wheel delivered as standard.
Cooling Water Consumption
For all WB models:
≈
30 l/kWh at
∆
t
= 30 °C (Metric)
≈
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
1 WB 15
140
103
1.4
12.3 5.00 × 10
-2
3.68 × 10
-2
35
2390
7500
4
2 WB 15
280
206
2.8
24.7 1.00 × 10
-1
7.37 × 10
-2
70
2390
7500
7.5
3 WB 15
420
309
4.2
37.1 1.50 × 10
-1
1.10 × 10
-1
105
2390
7500
10
4 WB 15
560
413
5.6
49.5 2.00 × 10
-1
1.47 × 10
-1
140
2390
7500
12
WB 15