| 摘要 |
<p>A control system of a heating, ventilation and air conditioning system comprises an indoor unit controller, an outdoor unit controller, a centrifugal blower motor, a compressor motor, and an axial fan motor. The indoor unit controller comprises an indoor unit microprocessor, a sensor, a first motor control interface unit, and a first power supply portion. The first power supply portion supplies power for circuits of various parts of the indoor unit controller. The sensor sends a detection signal to the indoor unit microprocessor through a signal processing circuit. The outdoor unit controller comprises an outdoor unit microprocessor, a second motor control interface unit, and a second power supply portion. The second power supply portion supplies power for circuits of various parts of the outdoor unit controller. The outdoor unit microprocessor controls the compressor motor and the axial fan motor through the second motor control interface unit. The indoor unit microprocessor controls the centrifugal blower motor through the first motor control interface unit. At least one of the centrifugal blower motor, the compressor motor and the axial fan motor is a permanent magnet synchronous motor without a motor controller. At least one inverter unit and one rotor position detection unit are provided in the first motor control interface unit and the second motor control interface unit. The indoor unit microprocessor or the outdoor unit microprocessor drives the permanent magnet synchronous motor without the motor controller through the inverter unit. The rotor position detection unit sends a rotor position signal of the permanent magnet synchronous motor without the motor controller to the indoor unit microprocessor or the outdoor unit microprocessor. In the control system, overlapped circuit configuration is omitted, thereby simplifying the circuit structure, and reducing the product cost.</p> |
