Motor driving apparatus of washing and drying machine
View Patent ↗With the use of three inverter circuits controlled by a single processor, the controller of the motor-driving apparatus provides a rotation drum-driving motor, a compressor-driving motor and a blow fan-driving motor with a simultaneous sinusoidal-wave control. The configuration above offers stable sinusoidal-wave drive, reducing vibration noise of the rotation drum, the compressor and the blow fan.
1. A motor-driving apparatus of a washing and drying machine comprising:
a rectifying circuit for converting AC (alternating current) power of AC power supply into DC (direct current) power;
a plurality of inverter circuits for converting the DC power from the rectifying circuit into AC power;
a first motor for driving a rotation drum;
a second motor for driving a compressor of a heat pump;
a third motor for driving a blow fan that sends air to a heat exchanger of the heat pump; and
a controller that controls the inverter circuits by a single processor,
wherein, the first motor through the third motors are simultaneously driven by sinusoidal-wave control of each of the inverter circuits.
2. The motor-driving apparatus of a washing and drying machine of claim 1 , wherein the controller simultaneously provides the second motor and the third motor with sensorless sinusoidal-wave drive.
3. The motor-driving apparatus of a washing and drying machine of claim 1 further includes a plurality of current detectors for detecting a motor current of the first motor, the second motor and the third motor, and the controller has a configuration in which the single processor controls the plurality of current detectors so as to detect a plurality of motor currents.
4. The motor-driving apparatus of a washing and drying machine of claim 3 , wherein the single processor of the controller includes a plurality of A/D converters for converting analog signals of the plurality of motor currents detected by the plurality of current detectors into digital signals.
5. The motor-driving apparatus of a washing and drying machine of claim 3 , wherein the single processor of the controller includes i) a plurality of PWM controllers for controlling the plurality of inverter circuits; and ii) a plurality of A/D converters for converting analog signals of the plurality of motor currents detected by the plurality of current detectors into digital signals.
6. The motor-driving apparatus of a washing and drying machine of claim 5 , wherein the plurality of A/D converters operate A/D conversion in synchronization with the plurality of PWM controllers.
7. The motor-driving apparatus of a washing and drying machine of claim 1 further includes a plurality of current detectors for detecting a motor current of the second motor and the third motor, and the controller has a configuration in which the single processor controls the plurality of current detectors so as to detect a plurality of motor currents.
8. The motor-driving apparatus of a washing and drying machine of claim 7 , wherein the single processor of the controller includes a plurality of A/D converters for converting analog signals of the plurality of motor currents detected by the plurality of current detectors into digital signals.
9. The motor-driving apparatus of a washing and drying machine of claim 7 , wherein the single processor of the controller includes i) a plurality of PWM controllers for controlling the plurality of inverter circuits; and ii) a plurality of A/D converters for converting analog signals of the plurality of motor currents detected by the plurality of current detectors into digital signals.
10. The motor-driving apparatus of a washing and drying machine of claim 9 , wherein the plurality of A/D converters operate A/D conversion in synchronization with the plurality of PWM controllers.