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Magtrol Hysteresis Dynamometers
•
Maximum brake temperature = 100 °C (212 °F)
•
Maximum rotor temperature = 460 °C (860 °F)
•
Ambient temperature = 25 °C (77 °F)
•
The dynamometer cooling system is running
The following values are sufficiently accurate (within 1%) to establish watts (W) for use in the heat
rise curves.
where P = power (watts), T = torque, and n = speed (rpm)
P (watts)
P (watts)
P (watts)
Note:
POWER ABSORPTION CURVES
Maximum Rated
Speed for
Dynamometer
Maximum Kinetic
Power Rating Curve for
Continuous Duty: Area
under curve equals the
maximum speed and
torque combinations for a
continuous duty motor test.
36000
30000
24000
HD-106
18000
12000
6000
30000
25000
20000
15000
10000
5000
30000
25000
20000
15000
10000
=
T (N·m)
×
=
T (lb·in)
×
=
T (kg·cm) ×
Please take a moment to familiarize yourself with any limitations
that may apply to your specific dynamometer and motor testing
requirements.
36000
30000
24000
18000
12000
6000
0
0
0
HD-106
Figure 4–1 Power Absorption Curve Parameters
Shaft Diameter
0
0
0.5
1
Shaft Height
1.5
2
0
3.6
7.2
10.8
14.4
TORQUE
Torque Range
HD-100
Input Inertia
Maximum Speed
Maximum Input Power
0
0
2.2
4.4
6.6
8.8
0
16
32
48
64
TORQUE
HD-500
5000
0
0
24
48
72
96
0
170
340
510
680
TORQUE
-1
n (rpm)
×
(1.047 × 10
-2
n (rpm)
×
(1.183 × 10
-2
n (rpm)
×
(1.027 × 10
0.5
1
1.5
2
2.5
(oz·in)
3.6
7.2
10.8
14.4
18
(mN·m)
TORQUE
The power absorption curves
represent the maximum power
0.1245 in / 0.1250 in
(heat) that the dynamometer can
(3.163 mm / 3.175 mm)
dissipate over time.
2.5
(oz·in)
3.50 in (88.9 mm)
18
(mN·m)
2.50 oz·in
180.0 g·cm
18.00 mN·m
30000
-7
7.04 × 10
lb·ft·s²
25000
20000
30,000 rpm
15000
continuous duty: 7 W
10000
< 5 minutes:
5000
0
11
(oz·in)
0
80
(mN·m)
0
56
30000
25000
20000
15000
10000
5000
0
0
24
120
(oz·in)
0
170
(mN·m)
850
37
Chapter 4 – Testing
)
)
)
HD
SERIES
Maximum Kinetic Power Rating
Curve for Less Than Five Minutes:
Area under curve equals the
maximum speed and torque
combinations for a motor test of
less than five minutes.
Maximum Torque
for Dynamometer
HD-400
35 W
(oz·in)
8
16
24
32
40
(mN·m)
112
168
224
280
TORQUE
HD-510
(oz·in)
48
72
96
120
(mN·m)
340
510
680
850
TORQUE
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