Motor frequency conversion control method and apparatus

A frequency conversion control and shaft voltage technology, applied in AC motor control, control system, electrical components, etc., can solve problems such as PWM output error, switching angle calculation error, and inaccurate harmonic loss calculation.

Active Publication Date: 2018-03-27
BEIJING CHEHEJIA AUTOMOBILE TECH CO LTD
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Problems solved by technology

[0003] However, when implementing the above method, the inventors found at least the following problems in the prior art: when calculating the harmonic loss, the inductance parameter of the motor is used, and the inductance of the m

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  • Motor frequency conversion control method and apparatus
  • Motor frequency conversion control method and apparatus
  • Motor frequency conversion control method and apparatus

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[0082] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0083] Such as figure 1 As shown, an embodiment of the present invention provides a frequency conversion control method of a motor, including:

[0084] 101. Obtain the actual position of the voltage vector of the motor.

[0085] The actual position of the voltage vector of the motor can be obtained in the coordinate system of the motor. The motor is transformed from a stationary three-phase shafting system to a stationary two-phase shafting ...

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Abstract

The invention provides a motor frequency conversion control method and apparatus, and relates to the technical field of frequency conversion of a motor; and not influenced by nonlinear parameters of the motor, high robustness is achieved. According to the main technical scheme, the motor frequency conversion control method comprises the steps of obtaining the actual position of a voltage vector ofthe motor; obtaining the instruction position of the voltage vector of the motor; and adjusting the motor drive switching frequency according to deviation between the actual position of the voltage vector and the instruction position of the voltage vector. The motor frequency conversion control method is mainly used for realizing synchronous frequency conversion control in the dynamic changing process of the motor.

Description

technical field [0001] The invention relates to the technical field of frequency conversion of motors, in particular to a method and device for frequency conversion control of motors. Background technique [0002] With the continuous improvement of industrial automation, frequency conversion technology has been widely used. At present, PWM (Pulse-Width Modulation, pulse width modulation) is widely used in the frequency conversion technology of motors. Among them, the following methods can be used to realize the frequency conversion control of motors: aim at the minimum harmonic loss of the motor, and use the modulation ratio Calculate the switching angle for the variable, thereby controlling the output of the PWM. [0003] However, when implementing the above method, the inventors found at least the following problems in the prior art: when calculating the harmonic loss, the inductance parameter of the motor is used, and the inductance of the motor is a quantity that change...

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Application Information

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IPC IPC(8): H02P27/04
Inventor 马东辉杨宝川
Owner BEIJING CHEHEJIA AUTOMOBILE TECH CO LTD
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