Air conditioner-based speed regulation method and speed regulation system for PG motor and air conditioner

Abstract

The invention discloses an air conditioner-based speed regulation method and speed regulation system for a PG motor and an air conditioner. The method comprises the steps as follows: a sine wave period corresponding to the rotating speed of the PG motor is averagely divided into 2C parts; each part is averagely divided into N intervals according to the area; the rotating speeds in the N intervals and corresponding coordinate values are stored into an array list, wherein C is 1 or 2; N is a natural number; the current rotating speed of the PG motor is detected and compared with the preset target rotating speed to obtain a rotating speed difference value between the current rotating speed and the target rotating speed; a data table is inquired to determine the coordinate value corresponding to the current rotating speed; the regulating quantity of the current rotating speed is obtained according to the rotating speed difference value; and the current rotating speed of the PG motor is regulated according to the regulating quantity. By an equal-voltage speed regulation mode, the rotating speed regulation is relatively stable; the probability of abnormal noise or abnormal performance caused by rotating speed fluctuation is lowered; and the service lifetime of the PG motor is prolonged.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner-based PG motor speed regulation method, a speed regulation system and an air conditioner. Background technique [0002] Most of the existing PG motor speed regulation methods use PID algorithm, and the chopping value is adjusted according to the fluctuation of the speed, and the adjustment value is mostly a fixed value. Among them, the PG motor means that the speed of the motor is controlled by the conduction angle of the thyristor. Instead of being controlled by a relay. Ordinary motors have three different sets of windings inside, corresponding to high, medium and low speeds. By controlling different relays, power is supplied to the corresponding windings, so as to achieve the purpose of adjusting the wind speed, while the PG motor has only one set of windings, and the conversion of the speed is realized by controlling the power supply voltage of t...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an air conditioner-based PG motor speed regulation method, a speed regulation system and an air conditioner, aiming to solve the problem of unstable speed of the PG motor in the air conditioner in the prior art, abnormal noise, and motor fragile defect

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