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Multi-phase winding series phase sequence with minimum bridge arm current stress and modulation method

A technology of current stress and phase winding, applied in windings, electric components, motor generator control and other directions, can solve the problem of large current stress of bridge arm, and achieve the effect of reducing loss, optimizing control performance and reducing cost

Active Publication Date: 2021-06-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the defects of the prior art, the purpose of the present invention is to provide a multi-phase winding series phase sequence and modulation method with the smallest bridge arm current stress, aiming to solve the current stress problem of some bridge arms of the current series winding topology inverter. big problem

Method used

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  • Multi-phase winding series phase sequence with minimum bridge arm current stress and modulation method
  • Multi-phase winding series phase sequence with minimum bridge arm current stress and modulation method
  • Multi-phase winding series phase sequence with minimum bridge arm current stress and modulation method

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Embodiment 1

[0053] Taking the five-phase six-arm motor drive system as an example, experiments are carried out according to the specific implementation steps of the present invention. And take the data obtained in the experimental process of the present invention as an example, to describe and verify the present invention in detail. The simulation parameter settings are shown in Table 1:

[0054] Table 1

[0055] parameter value Phase 5 bus voltage 400V Output phase voltage 120V Output phase current 7.5A Magnetizing inductance 3.4mH Stator resistance 1.5Ω

[0056] A five-phase motor is used as an odd-numbered phase motor, when the number of winding intervals And the phase winding intervals are anti-serialized, that is, according to Formal connection: the bridge arm current stress is the smallest, which is the optimal solution. At this time, the bridge arm voltage V l(1) ~V l(6) , winding phase voltage V P(1) ~V P(5) The vecto...

Embodiment 2

[0066] In order to reflect the versatility of the method, the seven-phase eight-arm motor drive system is taken as an example, and experiments are carried out according to the specific implementation steps of the present invention. The simulation parameters are set as follows:

[0067] Table 2

[0068] parameter value Phase 7 bus voltage 400V Output phase voltage 50V Output phase current 3.15A Magnetizing inductance 3.4mH Stator resistance 1.5Ω

[0069] A seven-phase motor is used as an odd-numbered phase motor, when the number of winding intervals And the phase winding intervals are anti-serialized, that is, according to Formal connection: the bridge arm current stress is the smallest, which is the optimal solution. At this time, the bridge arm voltage V l(1) ~V l(8) , winding phase voltage V P(1) ~V P(7) The vector relation of Figure 6 shown. According to the topology, the relationship between the reference ou...

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Abstract

The invention discloses a multi-phase winding series phase sequence with minimum bridge arm current stress and a modulation method, and belongs to the field of alternating current motors and driving control. All the stator windings are reversely connected in series at intervals according to the sequence of interval phase numbers, that is, after the positive ends and the negative ends of the stator windings are reversed every other winding, the stator windings are connected in series with the windings with the phase number difference of [delta]n, and N+1 motor winding nodes are led out. According to the invention, the current stress and the voltage utilization rate of the bridge arm are changed by changing the connection sequence of the phase windings and reversely connecting part of the windings, so that the current stress of the bridge arm can reach the minimum, and the problems of relatively large current stress and relatively high loss caused by sequential series connection of the motor phase windings in a common series winding topology are solved; the loss of the device can be greatly reduced, the cost is reduced, and the control performance is optimized; and when the phase number of the multi-phase motor is an odd number, a general solution formula of the value of [delta]n and a general solution formula of the ratio of the corresponding current stress to the phase winding current are obtained through analysis and calculation so as to enable the current stress to be minimum.

Description

technical field [0001] The invention belongs to the field of AC motors and drive control, and more specifically relates to a multi-phase winding series phase sequence and a modulation method with minimum bridge arm current stress. Background technique [0002] In recent years, due to the advantages of multi-phase motors such as small torque ripple, low power device capacity requirements, and strong fault tolerance, multi-phase motors and their control technologies have attracted more and more attention. In the research of multi-phase motor drive, the half-bridge topology is the basic topology of the traditional multi-phase inverter, but it has inherent shortcomings such as low degree of freedom in stator current control, narrow speed range, and poor fault tolerance; in addition, there is a This kind of N-phase full-bridge inverter topology, while overcoming some shortcomings of the half-bridge topology, also brings other shortcomings and contradictions such as many power dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28H02K3/50H02P21/14
CPCH02K3/28H02K3/50H02P21/14
Inventor 孙翔文汪志远李哲锴孙千宸黄霁蓝李安刘自程
Owner HUAZHONG UNIV OF SCI & TECH
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