Adjacent five-vector SVPWM (space vector pulse width modulation) method based on five-phase six-line topology

A five-phase six-wire topology technology, applied in vector control systems, converting irreversible DC power input to AC power output, controlling generators, etc., can solve the problems of poor control performance and achieve the effect of improving control performance

Active Publication Date: 2013-04-17
严格集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the zero-sequence component in the phase voltage output by the SVPWM method under the traditional five-phase five-wire topology, and the existence of third and sevent

Method used

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  • Adjacent five-vector SVPWM (space vector pulse width modulation) method based on five-phase six-line topology
  • Adjacent five-vector SVPWM (space vector pulse width modulation) method based on five-phase six-line topology
  • Adjacent five-vector SVPWM (space vector pulse width modulation) method based on five-phase six-line topology

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Example Embodiment

[0019] Specific implementation mode 1: the following combination figure 1 with Picture 10 To explain the present embodiment, the adjacent five-vector SVPWM method based on the five-phase six-wire topology in the present embodiment, in the five-phase six-wire topology, six bridge arms are formed by 12 power switches, of which: phase A, phase B The midpoints of phase, C-phase, D-phase and E-phase bridge arms are respectively connected to the input terminal of the motor, and the midpoint of the F-phase bridge arm is directly connected to the neutral point n of the motor load.

[0020] The method includes the following steps:

[0021] Step 1: The 12 power switch tubes in the SVPWM modulated five-phase six-wire topology have a total of 64 switching states, and the voltage space vectors corresponding to the 64 switching states are calculated to obtain 64 voltage space vectors;

[0022] Step 2: Determine the position of the reference voltage space vector, and select five adjacent non-zero ...

Example Embodiment

[0026] Specific implementation manner 2: the following combination Figure 1 to Figure 3 This embodiment will be described. This embodiment will further explain the first embodiment. In step 1, 64 voltage space vectors V k , The process of k=0,1,2,...,63 is:

[0027] In the five-phase six-wire topology, six bridge arms are formed by 12 power switch tubes, and the switching function of each bridge arm is S i , I=A, B, C, D, E, F, the upper bridge arm of the i-th bridge arm is turned on, mark S i =1, the lower bridge arm of the i-th bridge arm is turned on, mark S i =0;

[0028] Switch function press [S F , S A , S B , S C , S D , S E ] In the order of [S F , S A , S B , S C , S D , S E ] Binary code S F S A S B S C S D S E The corresponding decimal value k represents the switch state, k=0,1,2,...,63,

[0029] According to the formula

[0030] V k = V α 1 - k V β 1 - k V z - k V α 3 - k V β 3 - ...

Example Embodiment

[0047] Specific implementation manner three: the following combination Figure 1 to Figure 7 To describe this embodiment, this embodiment will further explain the first, second or third embodiment. The process of determining the position of the reference voltage space vector and selecting the action vector in step 2 is:

[0048] Reference voltage space vector V refl = V α 1 r V β 1 r V z r ,

[0049] Step 21. According to the projection of the voltage space vector on the α1β1 plane, 64 voltage space vectors divide the α1β1z space into ten triangular prisms:

[0050] The projection of the voltage space vector on the α1β1 plane forms a decagon, and the central angle of the decagon is θ,

[0051] Define the triangular prism in the range of θ=[0,π / 5) as the first triangular prism;

[0052] The triangular prism in the range of θ=[π / 5, 2*π / 5) is the second triangular prism;

[0053] The triangular prism in the range of θ=[2*π / 5, 3*π...

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Abstract

The invention provides an adjacent five-vector SVPWM (space vector pulse width modulation) method based on five-phase six-line topology, belongs to the field of motor control, and aims to solve the problem that the control performance of the conventional SVPWM method under a five-phase five-line topology structure is poor. The method comprises the following steps of step 1, as 12 power switch pipes in five-phase six-line topology carrying out SVPWM has 64 switch states, calculating voltage space vectors corresponding to the 64 switch states, and obtaining 64 voltage space vectors; step 2, judging the position of a reference voltage space vector, selecting five adjacent non-zero voltage space vectors and two zero vectors as action vectors according to the position of the reference voltage space vector; step 3, calculating the action time of the action vectors; and step 4, outputting a bridge arm switch signal by adopting a symmetric modulation mode according to the action vectors and the action time, thereby realizing SVPWM.

Description

technical field [0001] The invention relates to an adjacent five-vector SVPWM method based on five-phase six-wire topology, belonging to the field of motor control. Background technique [0002] Multiphase fault-tolerant motors can achieve low voltage and high power, and have the advantages of high power density, low torque fluctuation, and strong fault tolerance, and are attracting more and more attention. Considering the trade-off of cost, complexity and performance, five-phase motor is one of the best choices. In the motor control, neglecting the stator resistance, the relationship between the stator composite voltage and the composite flux linkage space vector is Taking a five-phase motor as an example, when the motor is powered by a five-phase symmetrical sinusoidal voltage, the resulting stator flux has a constant amplitude and rotates at a synchronous speed. [0003] As the number of motor phases increases, the possibility of parameter asymmetry between motor phase...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02M7/48
Inventor 郑萍王鹏飞隋义吴帆于斌
Owner 严格集团股份有限公司
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