User Manual for BPS-i600
www.levitronix.com
PL-4089-00, Rev00, DCO# 21-271
14
Figure 13: Temperature curves for IPD-600.2-50 driver @ 90 °C liquid temperature with
water cooling module WCM-i600.1.
(Typical data for pumping with pump head LPP-600.29, temp. is measured inside the driver.)
The above curves are measurements of the motor temperature at certain liquid and ambient temperatures.
equation
for water cooling with show how to approximately
calculate the motor temperature for other pumping liquid, ambient and cooling liquid temperatures based on
these curves.
𝑇
𝑀
(
𝑇
𝐿
𝑇
𝐴
) ≈ 𝑇
𝑀
(𝑇
𝐿
= 25°𝐶, 𝑇
𝐴
= 25°𝐶)
⏟
𝑠𝑒𝑒 𝐹𝑖𝑔𝑢𝑟𝑒 11
+ (𝑇
𝐿
− 25°𝐶) ∙
𝑡𝑔
𝐿𝑀
⏟
0.49
𝑓𝑜𝑟 𝑐𝑜𝑛𝑣𝑒𝑐𝑡𝑖𝑜𝑛
𝑐𝑜𝑜𝑙𝑖𝑛𝑔
+ (𝑇
𝐴
− 25°𝐶)
𝑇
𝑀
=
𝑀𝑜𝑡𝑜𝑟 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑇
𝐴
=
𝐴𝑚𝑏𝑖𝑒𝑛𝑡 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑇
𝐿
=
𝐿𝑖𝑞𝑢𝑖𝑑 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑡𝑔
𝐿𝑀
=
𝑇𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒 𝑔𝑟𝑎𝑑𝑖𝑒𝑛𝑡 𝑙𝑖𝑞𝑢𝑖𝑑/𝑚𝑜𝑡𝑜𝑟
(Eq. 1)
𝑇
𝑀
(
𝑇
𝐿
𝑇
𝐶𝐿
) ≈ 𝑇
𝑀
(𝑇
𝐿
= 90°𝐶, 𝑇
𝐶𝐿
= 20°𝐶)
⏟
𝑠𝑒𝑒 𝐹𝑖𝑔𝑢𝑟𝑒 13
+ (𝑇
𝐿
− 90°𝐶) ∙
𝑡𝑔
𝐿𝑀
⏟
0.33
𝑓𝑜𝑟 𝑤𝑎𝑡𝑒𝑟 𝑐𝑜𝑜𝑙𝑖𝑛𝑔
𝑤𝑖𝑡ℎ 𝑊𝐶𝑀−𝑖600.1
+ (𝑇
𝐶𝐿
− 20°𝐶)
𝑇
𝑀
=
𝑀𝑜𝑡𝑜𝑟 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑇
𝐶𝐿
=
𝐶𝑜𝑜𝑙𝑖𝑛𝑔 𝑙𝑖𝑞𝑢𝑖𝑑 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑇
𝐿
= 𝑃𝑢𝑚𝑝𝑖𝑛𝑔 𝐿𝑖𝑞𝑢𝑖𝑑 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑡𝑔
𝐿𝑀
= 𝑇𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒 𝑔𝑟𝑎𝑑𝑖𝑒𝑛𝑡 𝑙𝑖𝑞𝑢𝑖𝑑/𝑚𝑜𝑡𝑜𝑟
(Eq. 2)
All above presented thermal data are typical values, which are partly based on measurements and partly on
interpolations with a simplified thermal model and are therefore only guideline values and are suitable for a
first layout of the basic thermal concept. It is recommended to check the thermal values with the motor placed
on the final location and under worst case performance conditions of the application. To account for thermal
variations (like ambient temperature, closed chemical cabinets or corners without ventilations) and to not
significantly reduce the MTBF of the motor it is recommended to keep about 15°C safety distance to the
absolute thermal limit of the driver (80°C) when designing the thermal concept of the pump system. It is
recommended to avoid thermal stagnation in the room or cabinet, where the driver is placed. Any type of
circulation decreases the driver temperature significantly.
77
97
117
137
157
177
0.0
5.0
10.0
15.0
20.0
25
35
45
55
65
75
85
0
20
40
60
80
[°F]
[gallons / min]
[°C]
[liters / min]
Recommended Operational
Temperature Limit
9000 rpm
8000 rpm
7000 rpm
6000 rpm
5000 rpm
Absolute Thermal Limit
Ambient Temp = 25
°C
Liquid Temp. = 90
° C
Specific gravity = 1 g/cm
3
Viscosity = 0.7 cP
Water cooling module WCM-i600.1
with 0.5 l/min cooling water at 20
°C
