Dual three-phase motor minimum harmonic injection over-modulation strategy and carrier wave realization method thereof

A technology of harmonic injection and realization method, applied in motor generator control, electronic commutation motor control, control generator and other directions, can solve the problems of complex SVPWM realization process and other problems

Inactive Publication Date: 2018-07-27
XIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a dual-three-phase motor minimum harmonic injection overmodulation strategy and its carrier implementation method, which solves the problem that the minimum harmonic injection technology in the prior art is blank and the implementation process is complicated based on SVPWM

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  • Dual three-phase motor minimum harmonic injection over-modulation strategy and carrier wave realization method thereof
  • Dual three-phase motor minimum harmonic injection over-modulation strategy and carrier wave realization method thereof
  • Dual three-phase motor minimum harmonic injection over-modulation strategy and carrier wave realization method thereof

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Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] The minimum harmonic injection overmodulation strategy of the dual-three-phase motor and its carrier wave implementation method of the present invention are specifically implemented according to the following steps:

[0067] Step 1. Define the new vector synthesized by the large vector and medium vector in the same direction of the two-three-phase permanent magnet synchronous motor mapped to the fundamental sub-plane α-β sub-plane as the intermediate vector v, and the control period is T s , let the large vector v L The action time is μT s , then the medium vector v M The action time is (1-μ)T s , figure 1 is the synthesis process of the intermediate vector;

[0068] Step 2, obtain the intermediate vector v between α-β and z by the action time of each vector obtained in step 1 1 -z 2 the magnitude of the subplane, and find that ...

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Abstract

The invention discloses a dual three-phase motor minimum harmonic injection over-modulation strategy and a carrier wave realization method thereof. The specific method comprises the steps of introducing the concept of a middle vector, performing analysis on a harmonic voltage which needs to be injected into an over-modulation region harmonic sub plane based on a space voltage vector algorithm, andproposing a minimum harmonic injection strategy of the dual three-phase motor over-modulation region, so that the harmonic current in the over-modulation region is reduced to the maximum degree; andspecific to the problems of asymmetrical pulse width modulation waveform, relatively high switching loss and the like of the six-phase inverter four-vector space voltage vector algorithm, a linear modulation region algorithm and an over-modulation region algorithm are unified into a carrier wave-based dual zero sequence injection pulse width modulation strategy to be realized, so that smooth switching between the linear modulation region and the over-modulation region can be realized. The problems of blank of the minimum harmonic injection technology and a complex SVPWM-based realization process in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a minimum harmonic injection overmodulation strategy of a dual-three-phase motor and a carrier wave implementation method thereof. Background technique [0002] With the rapid development of power electronic conversion technology, the motor drive system has got rid of the limitation of three-phase power supply network. Multi-phase (number of phases > 3) motor drive systems have received extensive attention in the field of high-power and high-reliability AC drives. The multi-phase motor drive system has the advantages of low-voltage high-power output, low torque ripple, and is suitable for fault-tolerant operation. It is especially suitable for applications in electric vehicles, wind power, aerospace and other fields. Permanent magnet synchronous motors are widely used due to their good control performance, high power density, energy saving and other advantag...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P5/74
CPCH02P5/74H02P21/0003
Inventor 周长攀周兆吉孙向东唐伟
Owner XIAN UNIV OF TECH
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