Air conditioner DC brushless motor system and its speed control method

Abstract

The invention relates to an air-conditioning technology and provides a direct-current brushless motor system of an air conditioner and a rotating speed control method of the direct-current brushless motor system, solving the problems of low efficiency and high heat productivity of the traditional air conditioner resulted from adoption of a tap motor or PG motor. The technical scheme of the invention is as follows: the direct-current brushless motor system of the air conditioner is characterized by comprising an air conditioner indoor unit body and a direct-current brushless motor, wherein a motor shell of the direct-current brushless motor is integratedly provided with a motor microprocessor and control software; and the air conditioner indoor unit body comprises an indoor unit microprocessor and a direct-current brushless motor driving circuit, wherein the indoor unit microprocessor is connected with the direct-current brushless motor driving circuit, and the direct-current brushless motor driving circuit is connected with the direct-current brushless motor. The direct-current brushless motor system of the air conditioner and the rotating speed control method of the direct-current brushless motor system, disclosed by the invention, have the beneficial effects of achieving requirements on high efficiency, low electricity consumption, small size, high power density, large torque, high dynamic response speed of a transmission system, low noise and the like and being suitable for household air conditioners.

Description

technical field

[0001] The invention relates to the air-conditioning technology, in particular to the speed-regulating technology of the DC fan motor of the air-conditioning indoor unit. Background technique

[0002] For household air conditioners, the wall-mounted indoor air supply device is generally a tap motor or a PG motor, and the indoor unit of the cabinet unit is generally a tap motor. The operation of the fan is controlled by a microprocessor to realize the automatic air supply of the indoor fan. The air supply of the tapped motor is generally divided into several levels of air volume, such as high wind, medium wind, and low wind. Simple, but once the motor design is finalized, the air volume of each gear is fixed. The PG motor adopts the method of controlling the conduction angle of the thyristor to control its speed. Although the motor speed can be adjusted steplessly within a certain range, since only part of the positive and negative half-wave time of each AC s...

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