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Method for optimizing inverter modulation strategy and motor control equipment

A technology for inverters and modulation methods, applied in the field of optimizing inverter modulation strategies, methods and motor control equipment, can solve problems such as inability to achieve modulation effects

Active Publication Date: 2021-06-04
SUZHOU INOSA UNITED POWER SYST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the motor inverter adopts any kind of modulation method, and can only obtain the optimal modulation effect under a certain working condition (referring to the motor speed and torque), and cannot achieve comprehensive performance in the full range of working conditions. The best modulation effect can be obtained for all indicators

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  • Method for optimizing inverter modulation strategy and motor control equipment
  • Method for optimizing inverter modulation strategy and motor control equipment
  • Method for optimizing inverter modulation strategy and motor control equipment

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Embodiment Construction

[0033] The conception and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention.

[0034] like figure 1 As shown, an embodiment of the present invention provides a method for optimizing an inverter modulation strategy, which is suitable for a motor drive system. The method of this embodiment includes the following steps:

[0035] Step S1, obtaining the preset working condition range, the performance index to be optimized and multiple modulation modes; setting multiple working condition test points in the preset worki...

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Abstract

The invention discloses a method for optimizing an inverter modulation strategy, which is suitable for a motor inverter. The method comprises the steps of obtaining a preset working condition range, a plurality of to-be-optimized performance indexes and a plurality of modulation modes, and determining a plurality of working condition test points according to the preset working condition range; at each working condition test point, obtaining a comprehensive performance index criterion value of each alternative modulation mode in the plurality of modulation modes; and obtaining a modulation mode of each working condition point of the motor inverter in the preset working condition range according to the comprehensive performance index criterion values of all the working condition test points. According to the method, the working condition test points are arranged in the full working condition range, the comprehensive performance index criterion is constructed to obtain the comprehensive performance index value of each modulation mode under each working condition point in the full working condition range, and the modulation mode of each working condition point is determined according to the comprehensive performance index value of each modulation mode, and therefore, the comprehensive performance index of a driving system can achieve the optimal modulation effect in the full working condition range.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a method for optimizing an inverter modulation strategy and a motor control device. Background technique [0002] In the field of electric vehicles, the driving motors are mostly three-phase permanent magnet synchronous motors (PMSM) and three-phase asynchronous motors, and are driven by three-phase two-level inverters. Commonly used modulation methods for three-phase two-level inverters include: seven-segment SVPWM (SpaceVector Pulse-Width-Modulation, space vector pulse width modulation), five-segment SVPWM (Space VectorPulse-Width-Modulation, space vector pulse width modulation ), common-mode voltage suppression PWM (Pulse WidthModulation, pulse width modulation), etc., the harmonic distribution of phase voltage, peak-to-peak value of common-mode voltage, and average switching times of switching tubes are different for different modulation methods. [0003] Due to the efficiency o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08H02P21/00
CPCH02P27/085
Inventor 唐千龙严乐阳晋孝龙
Owner SUZHOU INOSA UNITED POWER SYST CO LTD
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