Motor thermal protection work process
Common faults of motor: Room temperature plugging, Low temperature (-30 ℃) plugging, High temperature (+ 85 ℃) plugging, Overload conditions. The thermal protector has a different working method for motor faults.
1, room temperature plugging thermal protection:
A. The motor output shaft is plugged. Apply a low voltage of 13. 5V ± 0. 2V to the motor. Thermostat for the first time from closed to off time ≧ 2s, The first break to the closing time ≦ 20s.
B. The motor output shaft plugging. The motor high-speed side of the application of 13. 5V ± 0. 2V voltage 3 hours, Thermostat for the first time from closed to off time ≧ 2s, The first break to the closing time ≦ 20s.
C. The motor output shaft plugging. The motor low-speed side of the application of 16. 0V ± 0. 2V voltage, The thermostat first from closed to off time ≦ 15s, The first break to the closing time ≦ 45s.
D. The motor output shaft plugging. On the motor high-speed side of the application of 16. 0V ± 0. 2V voltage, The thermostat first from closed to off time ≦ 15s, The first break to the closing time ≦ 45s.
2, low temperature (-30 ℃) plugging thermal protection:
Place the motor in the -30 °C ambient box for at least 2 hours, Motor output shaft plugging. On the low-speed side of the motor applied 11. 0V ± 0. 2V voltage 3 hours, Each time the thermostat is closed from the break time </ = 5 minutes, Each time from the break to the closed ≧ 5s.
3, high temperature (+85 ℃) plugging thermal protection:
Place the motor in a + 85 ° C ambient box for at least 2 hours, Motor output shaft plugging, The motor high-speed side of the application of 13. 5V ± 0. 2V voltage 3 hours, Each time the thermostat is closed from the opening time ≧ 2s, Each time from off to closed ≦ 2min.
4, overload conditions Thermal protection:
A. At room temperature, On the motor high-speed side of the application of 13. 5V ± 0. 2V voltage, And apply a 5N. m moment to the shaft shaft, Thermostat should be no action within 20 minutes.
B. At room temperature, Apply a low voltage of 13.5V ± 0.2V to the motor, And apply a 5N.m moment to the shaft shaft, Thermostat 40 minutes should be no action.
No. Temperature Voltage Speed Condition Off Time Closed Time
1 room temperature 13.5V low plugging ≧ 2s ≦ 20s
2 room temperature 13.5V high plugging ≧ 2s ≦ 20s
3 room temperature 16.0V low plugging ≦ 15s ≦ 45s
4 room temperature 16.0V high plugging ≦ 15s ≦ 45s
5 -30 ℃ 11.0V low plugging ≦ 5min ≧ 5s
6 + 85 ℃ 13.5V high plugging ≧ 2s ≦ 2min
7 room temperature 13.5V high 5 N.m ≧ 20min
8 room temperature 13.5V low 5 N.m ≧ 40min
1, room temperature plugging thermal protection:
A. The motor output shaft is plugged. Apply a low voltage of 13. 5V ± 0. 2V to the motor. Thermostat for the first time from closed to off time ≧ 2s, The first break to the closing time ≦ 20s.
B. The motor output shaft plugging. The motor high-speed side of the application of 13. 5V ± 0. 2V voltage 3 hours, Thermostat for the first time from closed to off time ≧ 2s, The first break to the closing time ≦ 20s.
C. The motor output shaft plugging. The motor low-speed side of the application of 16. 0V ± 0. 2V voltage, The thermostat first from closed to off time ≦ 15s, The first break to the closing time ≦ 45s.
D. The motor output shaft plugging. On the motor high-speed side of the application of 16. 0V ± 0. 2V voltage, The thermostat first from closed to off time ≦ 15s, The first break to the closing time ≦ 45s.
2, low temperature (-30 ℃) plugging thermal protection:
Place the motor in the -30 °C ambient box for at least 2 hours, Motor output shaft plugging. On the low-speed side of the motor applied 11. 0V ± 0. 2V voltage 3 hours, Each time the thermostat is closed from the break time </ = 5 minutes, Each time from the break to the closed ≧ 5s.
3, high temperature (+85 ℃) plugging thermal protection:
Place the motor in a + 85 ° C ambient box for at least 2 hours, Motor output shaft plugging, The motor high-speed side of the application of 13. 5V ± 0. 2V voltage 3 hours, Each time the thermostat is closed from the opening time ≧ 2s, Each time from off to closed ≦ 2min.
4, overload conditions Thermal protection:
A. At room temperature, On the motor high-speed side of the application of 13. 5V ± 0. 2V voltage, And apply a 5N. m moment to the shaft shaft, Thermostat should be no action within 20 minutes.
B. At room temperature, Apply a low voltage of 13.5V ± 0.2V to the motor, And apply a 5N.m moment to the shaft shaft, Thermostat 40 minutes should be no action.
No. Temperature Voltage Speed Condition Off Time Closed Time
1 room temperature 13.5V low plugging ≧ 2s ≦ 20s
2 room temperature 13.5V high plugging ≧ 2s ≦ 20s
3 room temperature 16.0V low plugging ≦ 15s ≦ 45s
4 room temperature 16.0V high plugging ≦ 15s ≦ 45s
5 -30 ℃ 11.0V low plugging ≦ 5min ≧ 5s
6 + 85 ℃ 13.5V high plugging ≧ 2s ≦ 2min
7 room temperature 13.5V high 5 N.m ≧ 20min
8 room temperature 13.5V low 5 N.m ≧ 40min
