Automatic detection method of fault of program guidance (PG) motor

Abstract

The invention relates to an automatic detection method of the fault of a program guidance (PG) motor, which comprises the following steps of: (1) when an air conditioner is started, setting a single chip computer in an air-conditioning controller to always detect the feedback signal of the PG motor; (2) if the single chip computer does not receive the feedback signal of the PG motor within the set time t1, switching off a power supply of the PG motor; (3) after the set time t2, switching on the power supply of the PG motor by the single chip computer and starting detecting the feedback signalof the PG motor; and (4) if the single chip computer still does not receive the feedback signal of the PG motor within the set time t1, judging that a fault occurs in the PG motor and displaying the fault code of the fault of the PG motor on a display screen of the air conditioner. By adopting the method, the quality in the after-sale service and the production process of the air conditioner are very convenient to manage and control.

Description

Technical field: [0001] The invention relates to the field of air conditioners, in particular to a method for automatic detection of PG motor faults in the air conditioner. Background technique: [0002] At present, the indoor unit fan motor of the wall-mounted split air conditioner is basically a PG motor. The PG motor is a motor with a Hall element. One or several feedback pulse signals, the single-chip microcomputer receives the feedback signal and can obtain the current motor speed through calculation. The conduction angle of the PG motor is used to adjust the working voltage of the PG motor to make the motor reach the set target speed. The speed of the motor is not affected by the change of the air conditioner load and the change of the power supply voltage. The control accuracy is very high and it is widely used. But PG motor has more input and output control components than tap motors, so the failure rate is relatively high during use. After the motor breaks down, th...

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Problems solved by technology

But the input and output control parts of PG motor are more than the tap motor, so the failure rate is relatively high in the use process, and the air conditioner cannot be used after the motor breaks down. There is no method for automatic detection of PG motor failure in the prior art, so In the production process and after-sales service, it is difficult to find the root cause of the air conditioner failure for a while, and the air conditioner failure cannot be quickly eliminated, which greatly troubles the air conditioner after-sales service and quality control in the production process.

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