Motor Winding Temperature
In case of LBP refrigerant system
The motor winding temperature should not exceed 120 ℃ (248 ℉ ) in the continuous operation and 130 ℃
(266 ℉ ) in the Pull-Down operation at the expected ambient temperature(43 ℃ )
In case of HBP refrigerant system
The motor winding temperature should not exceed 120 ℃ (248 ℉ ) in the continuous operation and
130 ℃ (266 ℉ ) in the Pull-Down operation at the expected ambient temperature(26.7 ℃ , 81 ℉ )
The limit motor winding temperature should not exceed 130 ℃ (266 ℉ ) at the expected maximum ambient
temperature(32.2 ℃ , 90 ℉ ).
If the temperature exceeds, the motor is overloaded, then it shortens the motor life. The winding
temperature of the motor can be calculated by below equation.
In case of HBP refrigerant system with R134a refrigerant gas
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APPLICATION GUIDE APPLICATION GUIDE
* Remarks
1. “A” area on chart : Stabilized running condition before stopping.
2. “B” area on chart : Transient running condition just after starting.
3. “C” area on chart : Compressor initial pull-down and restarting after defrost.
T2 = (R2-R1)/R1*(K+T1)+T1
T1 : The room temperature at the beginning of the test
T2 : The winding temperature(unknown) at the end of the test
R1 : The resistance at the beginning of the test
R2 : The resistance at the end of the test
K : Temperature coefficient of resistance
(Copper wire : 234.5, Aluminum wire : 225.0
松下3CC171LAOM _参数_报价...
