Electric Compressor

COMPONENT PARTS

Electric Compressor






- An electric scroll compressor is used.
Note
- A 3-phase output inverter with IPM is used.
Note
- The inverter is adopted to IPM for smaller size and improved reliability.
NOTE:
IPM (Intelligent Power Module) is the element which delivered power device equivalent to IGBT and the protection feature of the circuit to one package.
NOTE:
IGBT (Insulated Gate Bipolar Transistor) is a transistor which is suitable for high voltages and large currents and which can control large electrical power using a small gate voltage.
- The structure integrates the inverter, compressor, and motor, allowing compressor to operate at any speed.
Note
- The inverter communicates with A/C auto amp., and uses PWM control to control the motor speed via the drive circuit.





NOTE:
- PWM (Pulse Width Modulation) is a system that controls current and voltage by changing the duty ratio of a constant frequency pulse wave.
- PWM is used as the adjustment method of output voltage when inverter is used as a power supply for controlling motor speed.
- PWM changes voltage application time (pulse width) using a semiconductor element and controls motor speed.
- The IPM contains an internal protection circuit, and uses the inverter control circuit to monitor for an increase in motor drive circuit temperature in order to prevent circuit overheating.
- The motor uses a DC brushless motor, with speed control performed by the inverter drive circuit.
- A scroll-type compressor is used. The motor drive force is used to rotate the moveable scroll and perform refrigerant intake, compression, and discharge.