27
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 115 Series is particularly intended
* Voltage at 20 °C is 30 volts.
for motors which rotate at high speeds, up to 22,000 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 115 Series Eddy-Current Dynamometers.
100
1000
10,000
100,000
0.1
1
100
0.1
1
100
2865 rpm
10
10
18,000 rpm
Speed
limit
for
WB
2 WB 115 (T
ORQUE)
1 WB 115 (T
ORQUE)
Rotation Speed (rpm)
To
rque (N·m
)
Po
wer (kW
)
2
WB 115 (PO
WER)
1
WB
115
(PO
WER)
Optical Speed Sensor
Each 115 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*
standard
version
high-speed
version (HS)
N·m
lb·ft
N·m
lb·in
kg·m²
lb·ft·s²
kW
rpm
rpm
rpm
A
1 WB 115
50
36.8
0.5
4.43 1.27 × 10
-2
9.36 × 10
-3
15
2865
18,000
22,000
2.5
2 WB 115
100
73.7
1.0
8.85 2.57 × 10
-2
1.89 × 10
-2
30
2865
18,000
22,000
5
WB 115