User`s manual

4
Magtrol WB/PB DynamometersChapter 1 – Introduction
3
MAGTROL
Spec ifications
WB DYnaMoMeter ratings
The WB Eddy-Current Dynamometers develop their full power
at high rotation speeds. The 2.7 Series is particularly intended
* Voltage at 20 °C is 15 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 2.7 Series Eddy-Current Dynamometers.
Optical Speed Sensor
Each 2.7 Series WB Dynamometer has an optical speed sensor
with a 30-bit pulse wheel delivered as standard.
Cooling Water Consumption
For all WB models: z 30 l/kWh at $t = 30 °C (Metric)
 z 8 gal/kWh at $t = 86 °F (US)
1
WB 2.7-8-K (T
ORQUE)
1 W
B 2
.
7
-
8-
K (
P
O
W
E
R
)
1000
100
10
1000
100
10
100 1000 10,000
50,000 rpm15,915 rpm
100,000
Speed Limit for WB
Rotation Speed (rpm)
Torque (mN·m)
Power (W)
4
WB 2.7-8-K (T
ORQUE)
4 WB 2.7-8-K
(POWER)
3 WB 2.7-8-K
(POWER)
3
WB 2.7-8-K (T
ORQUE)
2
WB 2.7-8-K (T
ORQUE)
2 W
B 2
.7
-8-K
(P
OW
E
R
)
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 oz·in mN·m oz·in kg·m² lb·ft·s² W r pm r pm r pm A
1 WB 2.7-8K
0.15 21.2 6 0.84 1.49 × 10
-5
1.09 × 10
-5
250 15,915 50,000 70,000 0.5
2 WB 2.7-8K
0.30 42.4 9 1.27 2.33 × 10
-5
1.71 × 10
-5
500 15,915 50,000 70,000 1.0
3 WB 2.7-8K
0.45 63.7 9 1.27 3.18 × 10
-5
2.34 × 10
-5
750 15,915 50,000 70,000 1.5
4 WB 2.7-8K
0.60 84.9 12 1.69 4.03 × 10-5 2.97 × 10
-5
1000 15,915 50,000 70,000 2.0
WB 2.7