11
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 43 Series is particularly intended
* Voltage at 20 °C is 24 volts.
for motors which rotate at high speeds, up to 50,000 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 43 Series Eddy-Current Dynamometers.
10
1
0.1
10
1
0.1
100
1000
10,000
50.000 rpm
9550 rpm
100,000
Speed Limit f
or
WB
Rotation Speed (rpm)
To
rque (N·m
)
Po
wer (kW
)
2 WB 43 (T
ORQUE)
1 WB 43 (T
ORQUE)
2
WB 43 (PO
WER)
1
WB 43 (PO
WER)
Optical Speed Sensor
Each 43 Series WB Dynamometer has an optical speed sensor
with a 30-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
mN·m oz·in
kg·m²
lb·ft·s²
kW
rpm
rpm
rpm
A
1 WB 43
1.5
1.1
15
2.12 1.21 × 10
-4
8.92 × 10
-5
1.5
9550
50,000
65,000
1
2 WB 43
3.0
2.2
30
4.24 2.17 × 10
-4
1.60 × 10
-4
3
9550
50,000
65,000
2
WB 43