Condenser - Midea G01 Service Manual

4.OVERVIEW OF MAIN COMPONENTS
2. Main parts and structure of motor
Stator and rotor
Stator has rotating magnetic field, including stator windings, the core and upper/lower
cover for fixing it.
Stator windings is the high strength polyester enameled wire enwinding the core which
is sheeted with the silicon steel about 0.5mm thickness by riveting and welding. Both
sides of the silicon steel are coated with insulating paint, as well as rotor.
As the rotating parts, rotor output torque from its shaft, including the rotor windings,
core and axial. There is a belt pulley of the motor to output torque on the extended-rotor
shaft.
Gas gap
The unilateral width of the gas gap between stator core and rotor core usually is 0.3mm.
Due to the magnetic resistance of air is less than metal's, gas cap is larger, the more is
magnetic resistance and the more is Exciting Current to produce the same size rotating
magnetic field, as a result, power factor of the motor become lower. To reduce the
exciting current, the gas gap should become small, taking into account safety factors of
assembly and transport.
Thermal protector
Usually use restorable double foils to cut off the power when the temperature of motor
more than the set one, to protect motor, the set temperature of foils is115±5 , the
contractor will restart the power supply when the temperature is lower than the set one.
4.20 PCB panel
General characteristic
1)The control panel executes the main functions below:
2)Control the spinning(high-speed or low-speed spin
and the speed of the last spin)
3)Control the temperature of washing liquid
4)Control and adjust the unbalanced load during spin
The control of spinning speed
The control panel modulates motor's speed by modulating
its voltage. By modulating the knob position of speed
chooser, the user can set the speed value in the control
panel. Then comparing the value of the speed and the
impulse value from testing motor, when the control panel
makes sure that the motor speed arrive the set speed, it will not modulate the voltage of
motor. As a result, the washing machine's drum runs at the set speed.
The control of temperature of washing and heating
The user sets the temperature in the control panel by pressing the temperature key; the
control panel compares the set temperature and the washing temperature from the
℃
P.33