A five-phase inverter space voltage vector modulation method without sector division

A space voltage vector, five-phase inverter technology, applied in vector control system, motor control, motor generator control and other directions, to achieve the effect of improving utilization, simple method and enhancing stability

Active Publication Date: 2022-03-11
FUZHOU UNIV
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a five-phase inverter sector-free space voltage vector modulation method to solve the control required for electromechanical energy conversion on two planes in a motor series system composed of two five-phase motors vector modulation

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  • A five-phase inverter space voltage vector modulation method without sector division
  • A five-phase inverter space voltage vector modulation method without sector division
  • A five-phase inverter space voltage vector modulation method without sector division

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Embodiment Construction

[0069] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0070] Please refer to figure 1 , the present invention provides such as figure 1 As shown, this embodiment provides a non-sectorized space voltage vector modulation method for a five-phase inverter, including the following steps:

[0071] Step S1: collect the relevant data of five-phase inverter, select 5 voltage vectors, and calculate respectively the time of action of 5 voltage vectors respectively;

[0072] Step S11: Collect the output current i of the five-phase inverter A i B i C i D i E And the rotor position angle θ of the first five-phase motor M1 and the second five-phase motor M2 controlled by the five-phase inverter r1 and θ r2 ;

[0073] Step S12: Carry out reference voltage vector amplitude calculation respectively, obtain the voltage fundamental wave plane of the first five-phase motor M1 i.e. the M1 plane and the voltage fundame...

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Abstract

The invention relates to a space voltage vector modulation method for a five-phase inverter without sector division. By selecting five voltage vectors, respectively calculating the respective action times of the five voltage vectors, according to the principle of equivalent impulse, the five voltage vectors are The respective action time is converted into the on and off time of each switching device of the inverter bridge arm of the inverter, and the switching signal of the power switching device of the five-phase bridge arm is controlled, and the five space voltage vectors output by the five-phase inverter are simultaneously It acts on two motors to achieve decoupling control of the electromechanical energy conversion of the two motors. The control strategies adopted by the two motors can be either vector control or direct torque control. The non-sector division SVPWM space voltage vector synthesis method adopted in the present invention realizes the precise synthesis of the space voltage vectors in the M1 and M2 planes corresponding to the two motors, simplifies the space voltage vector modulation algorithm, and improves the utilization rate of the DC bus voltage .

Description

technical field [0001] The invention relates to the field of five-phase inverter modulation, in particular to a sector-free space voltage vector modulation method for a five-phase inverter. Background technique [0002] Under the same output torque, the multi-phase motor reduces the magnitude of the phase current and the copper loss of the motor stator compared with the three-phase motor. The advantages of multiple degrees of freedom of multi-phase motors combined with appropriate control algorithms can achieve stable operation under the condition of a certain phase winding open circuit fault of the motor, and it has received more and more attention in industrial applications with high reliability. As a common multi-phase motor, the five-phase motor has fewer winding phases and lower manufacturing cost, and is one of the most commonly used multi-phase motors at present. In order to realize the stable control of the multi-phase motor, it is powered by a five-phase inverter. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/12H02P21/14H02P21/18H02P6/04H02P6/10H02P6/16
CPCH02P27/12H02P21/14H02P21/18H02P6/04H02P6/10H02P6/16H02P2203/03
Inventor 周扬忠俞海良屈艾文陈艳慧钟天云
Owner FUZHOU UNIV
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