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A motor control method and an air conditioner

A technology for motor control and air conditioning, applied in the field of electronics, can solve problems such as insufficient motor regulation and control, and achieve the effects of improving voltage utilization, enhancing precise regulation and control, and improving performance

Active Publication Date: 2018-09-28
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides a motor control method and an air conditioner, which are used to solve the technical problem that the regulation and control of the motor is not fine enough

Method used

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  • A motor control method and an air conditioner
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  • A motor control method and an air conditioner

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Embodiment Construction

[0027] The embodiment of the present invention provides a motor control method and an air conditioner, which are used to solve the technical problem that the adjustment control of the motor is not precise enough.

[0028] In order to solve the above technical problems, the general idea of ​​the technical solution provided by the embodiments of the present invention is as follows:

[0029] In this application, first, according to the duty cycle of the d-axis and the duty cycle of the q-axis, determine the duty cycle of the α-axis and the duty cycle of the β-axis in the α / β coordinate system, and then according to the duty cycle of the α-axis Determine the initial duty cycle of the three-phase input current of the motor, and then inject harmonics into the three-phase input current to obtain the duty cycle after the injection of the three-phase input current. The duty cycle determines the three-phase modulation PWM wave, and through the determined three-phase PWM wave, the operation o...

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Abstract

Embodiments of the invention provide a motor control method and an air conditioner, and aim to solve the technical problem that regulation and control for motors is not accurate enough. The motor control method comprises the steps of determining duty ratio of an alpha axis and duty ratio of a beta axis in an alpha / beta coordinate system according to the duty ratio of a d axis and the duty ratio of a q axis; determining the initial duty ratio of three-phase input current of the motor separately according to the duty ratio of the alpha axis and the duty ratio of the beta axis; injecting harmonics to the three-phase input current, and obtaining the duty ratio of the three-phase input current after harmonic injection; and determining a three-phase (pulse width modulation) PWM wave according to the duty ratio after harmonic injection, and controlling the running of the motor through the three-phase PWM wave.

Description

Technical field [0001] The invention relates to the field of electronic technology, in particular to a motor control method and an air conditioner. Background technique [0002] At present, the vector control method can be used to control the motor. Specifically, according to the on / off combination method of the upper and lower arms of the 6 inverters, 8 vectors are formed, such as figure 1 , 8 appropriate amounts are U1(100), U2(110), U3(010), U4(011), U5(001), U6(101), U7(111) and U0(000), where 1 means The upper bridge arm is turned on and the lower bridge arm is disconnected, 0 means the upper bridge arm is disconnected and the lower bridge arm is turned on, and U7 (111) represents a zero vector where the upper bridge arms are all turned on and the lower bridge arms are all disconnected. U0(000) represents another zero vector in which the upper bridge arms are all disconnected and the lower bridge arms are all turned on. The voltages corresponding to U7(111) and U0(000) are b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/12H02P21/28
CPCH02P21/0021H02P27/12
Inventor 陈跃涂小平刘启武王声纲朱绯
Owner SICHUAN CHANGHONG ELECTRIC CO LTD