When the power is off, my fridge for power when using the generator is often difficult to start, each time you start the house lights will become very dark, but after the restart operation is normal, whether I want to take off the gravity starter of the refrigerator, like an air conditioner for capacitor?
The refrigerator compressor starts with resistanceThe internal structure is different from the air conditioning compressor
Now the refrigerator compressor is generally used for starting the PTC thermistor so do not need capacitors, is actually not difficult to start, but you feel it, the PTC thermistor cold resistance is very small, once after starting resistance increases so to avoid the frequent start of refrigerator compressor, and refrigerator to avoid frequent start
Single-phase motor compressor for refrigerator, for each manufacturer of motor winding is different so the start will be different, starting method can be divided into impedance split phase, capacitor start, capacitor start capacitor operation.1, the working principle of impedance split startThe stator winding of the compressor motor is an inductance coil, and the impedance is different because the winding and starting winding have different diameters and turns. When the alternating circuit two winding, winding current operation in hysteresis voltage of 90 degrees will have two different inductance values, the resistance phase, starting torque. When the motor speed reaches the rated speed of 70%~80%, under the control of "starting relay", the starting winding circuit is switched off, and only the running winding drives the motor to run.2, capacitor start working principleCompressor capacitor start circuit and impedance phase trigger circuit is similar, different series capacitor 220V, a 45~100 F in the start winding, the phase difference of phase circuit increases, starting torque increases.3, capacitor start, capacitor operation principleStarting circuit, capacitor start capacitor operation of the compressor motor, and the difference between the capacitor start circuit is: in the starting relay and a starting capacitor beside a small capacity shunt capacitor, when starting the process end, start capacitor from the circuit is cut off, and start winding is still running winding in parallel, thus the starting winding can bear a part of the motor load, the motor efficiency is higher.
