PG motor control method and apparatus thereof
A technology of motor control and control signal, applied in the direction of motor control, control system, electrical components, etc., can solve the problems of temperature rise, affecting the service life of the motor, the normal operation of the air conditioner, and no solution, and achieve the effect of overheating protection
Active Publication Date: 2017-03-08
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0003] In the process of PG motor application, when the working temperature is too high, the temperature rise of the PG motor will be too high after long-term operation, and the PG motor will not be able to reach the set high speed, while the control signal has been kept at the minimum lead. As a result, the PG motor has been kept at the maximum working load, causing the temperature to rise continuously, and finally enters the overheating protection, and the motor stops running, which seriously affects the service life of the motor and the normal operation of the air conditioner
[0004]
For the above problems, no effective solution has been proposed
Method used
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[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0049] In order to better illustrate the present invention, the parameters and working principle of the PG motor are described as follows:
[0050] Such as figure 1 As shown, the main parameters of the PG motor include:
[0051] 1) The power supply voltage is a strong current input voltage waveform;
[0052] 2) Voltage zero-crossing signal, which is the signal waveform output by the zero-crossing circuit to the strong current power supply conversion;
[0053] 3) The speed control signal is the pulse control signal output by the MCU to control the motor;
[0054] 4) PG motor voltage is the a...
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The invention provides a PG motor control method and an apparatus thereof. The method comprises the following steps of determining whether a PG motor satisfies a preset high temperature protection condition; if the PG motor satisfies the condition, reducing a preset rotation speed of the PG motor. In the prior art, the PG motor is kept to be in a maximum work load so that a temperature is continuously increased and finally the motor is in an overheating protection state, and then the motor stops running, which seriously influences a service life of the motor and normal operation of an air conditioner. Through the mode in the invention, the above problems are solved and a technology effect of effectively realizing the overheating protection is reached.
Description
technical field [0001] The invention relates to the technical field of equipment processing, in particular to a PG motor control method and device. Background technique [0002] Because the PG motor (PG motor means that the motor speed is controlled by the conduction angle of the thyristor, not by the relay) has the function of stepless speed regulation compared with the tap motor, and the price is relatively low. Therefore, it is widely used in air-conditioning indoor units. [0003] In the process of PG motor application, when the working temperature is too high, the temperature rise of the PG motor will be too high after long-term operation, and the PG motor will not be able to reach the set high speed, while the control signal has been kept at the minimum lead. As a result, the PG motor has been kept at the maximum working load, causing the temperature to rise continuously, and finally enters the overheating protection, and the motor stops running, which seriously affec...
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IPC IPC(8): H02P29/60
Inventor 杨桐金德武郭锋
Owner GREE ELECTRIC APPLIANCES INC