Thermal Management; Motor Temperature - Levitronix BPS-2000.1 User Manual

3.4 Thermal Management

3.4.1 Motor Temperature

The motor temperature depends on the ambient and liquid temperature, as well as on the hydraulic
operation point and the characteristics (viscosity and density) of the liquid. Figure 21 illustrates the
temperature characteristics for aqueous liquids at room temperature. For higher liquid temperatures and
hydraulic operating points active cooling is recommended for example with the Air Cooling Module ACM-4.2
(see Figure 22).
0
95
Absolute Temperature Limit
85
Recommended Operational Limit
75
65
0
[ C]
55
45
35
High-Flow System
Pump Head LPP-2000.6
25
0
0 2
95
85
75
65
0
[ C]
55
45
35
High-Pressure System
Pump Head LPP-2000.7
25
0 10
Figure 21: Temperature curves for the LPM-2000.2 motor @ 25 C liquid temperature
(Temperature is measured inside of the motor, temperature of housing and sensor electronics is significantly below this temperature)
PL-4021-00, Rev02, DCO# 15-235
5 10 15
20 40
4 6 8
20 30
[gpm]
20 25
60 80
[lpm]
[gpm]
10 12 14
10000 rpm
Recommended Operational Limit
Ambient Temp = 25 C
Liquid Temp. = 25 C
Specific gravity = 1 g/cm
Viscosity = 0.7 cP
Temp. Time Constant = ~2 hours
40 50 60
[lpm]
User Manual for BPS-2000
www.levitronix.com
30 35
8000 rpm
7000 rpm
6000 rpm
5000 rpm
4000 rpm
Ambient Temp = 25 C
Liquid Temp. = 25 C
3
Specific gravity = 1 g/cm
Viscosity = 0.7 cP
Temp. Time Constant = ~2 hours
100 120
16 18 20 22
Absolute Temperature Limit
9000 rpm
8000 rpm
7000 rpm
6000 rpm
5000 rpm
4000 rpm
3
70 80
197
177
157
[°F]
137
117
97
77
140
197
177
157
[°F]
137
117
97
77
19