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Motor drive system, and synchronous calculation method and device capable of sampling phase currents and phase voltages

A technology of synchronous calculation and voltage synchronization, applied in the control of electromechanical transmissions, control systems, control of generators, etc., can solve the angle deviation calculated by the flux linkage observer, and the current vector and voltage vector are out of synchronization, which affects the motor control performance. and other problems to achieve the effect of ensuring normal operation and ensuring accuracy

Active Publication Date: 2018-05-04
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD +1
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Problems solved by technology

[0004] However, when the current and voltage of the motor are obtained through the above methods, the phenomenon that the current vector and voltage vector input to the flux observer are often out of sync, when the frequency of motor operation is relatively high, or the digital sampling frequency (i.e. When the current loop control frequency and PWM switching frequency) are low, this phenomenon will cause deviations in the angle calculated by the flux observer, which will affect the control performance of the motor

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  • Motor drive system, and synchronous calculation method and device capable of sampling phase currents and phase voltages
  • Motor drive system, and synchronous calculation method and device capable of sampling phase currents and phase voltages
  • Motor drive system, and synchronous calculation method and device capable of sampling phase currents and phase voltages

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[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0051] The motor drive system and the synchronous calculation method and device for sampling phase current and phase voltage according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0052] figure 1 It is a flowchart of a synchronous calculation method for sampling phase current and phase voltage of a motor driver according to an embodiment of the present invention.

[0053] Such as figure 1 As shown, the synchronous calculation method of the motor driver sampli...

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Abstract

The present invention discloses a motor drive system, and a synchronous calculation method and a device capable of sampling phase currents and phase voltages. The method comprises the following steps:sampling three-phase current(s) of a motor to acquire current sampling value(s), and acquiring instruction voltage(s) or sampling voltage(s) as voltage sampling value(s); and performing synchronous conversion processing on the current sampling value(s) and the voltage sampling value(s), and acquiring fundamental wave voltage(s) at current sampling time to allow current vector(s) and voltage vector(s) input into a flux observer to keep synchronous. The method can ensure accuracy of output angle(s) of the flux observer and the normal operation of the motor.

Description

technical field [0001] The present invention relates to the field of motor drive technology, in particular to a method for synchronous calculation of phase current and phase voltage sampling by a motor driver, a non-transitory computer-readable storage medium, and a synchronous calculation device for sampling phase current and phase voltage of a motor driver and a motor drive system. Background technique [0002] High-performance AC motor drive systems often use vector control technology, such as field oriented control or direct torque control, etc. When using this type of control technology, it is necessary to know the accurate motor flux position or speed information. In applications such as industry, home appliances or automobiles, in order to reduce hardware costs or get rid of mechanical installation restrictions, a flux observer will be used to replace the position / speed sensor of the motor, and the flux linkage of the motor can be obtained through the method of softwa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/13
CPCH02P21/13H02P21/14H02P21/141
Inventor 刘毅孙杰
Owner GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD
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