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Space vector modulation method capable of suppressing common-mode voltage of dual-Y shift 30-degree six-phase motor

A space vector modulation and common-mode voltage technology, which is applied to electrical components, control systems, motor control, etc., can solve problems such as difficult to effectively suppress common-mode voltage

Active Publication Date: 2016-08-03
HUNAN UNIV
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Problems solved by technology

From the point of view of the common mode voltage output, the worst case is switching from an odd zero vector to an even zero vector, which will produce a positive peak as U d / 2, the negative peak value is -U d / 2, the peak-to-peak value is U d (U d is the common-mode voltage of the inverter DC bus voltage), it is difficult to effectively suppress the common-mode voltage of the double Y-shifted 30-degree six-phase motor

Method used

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  • Space vector modulation method capable of suppressing common-mode voltage of dual-Y shift 30-degree six-phase motor
  • Space vector modulation method capable of suppressing common-mode voltage of dual-Y shift 30-degree six-phase motor
  • Space vector modulation method capable of suppressing common-mode voltage of dual-Y shift 30-degree six-phase motor

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] refer to figure 1 , this embodiment includes the following steps:

[0048] (1) Generate 64 basic vectors;

[0049] (2) Construct 12 intermediate vectors;

[0050] (3) Calculate the action time of 8 basic vectors;

[0051] (4) Design the action sequence of 8 basic vectors.

[0052] In step (1), the process of generating 64 basic vectors is as follows:

[0053] Coordinate Transformation Matrix of Six-phase Motor Using Double Y-Shift 30 Degrees

[0054] T 6 × 6 = 1 3 1 3 2 - ...

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Abstract

The invention relates to a space vector modulation method capable of suppressing the common-mode voltage of a dual-Y shift 30-degree six-phase motor. The method includes the following steps that: (1) 64 basic vectors are generated; (2) 12 intermediate vectors are constructed; (3) the action time of 8 basic vectors is calculated; and (4) the action sequence of the 8 basic vectors is designed. With the space vector modulation method of the invention adopted, the common-mode voltage of the dual-Y shift 30-degree six-phase motor can be effectively suppressed, and the current response, magnetic flux linkage track, electromagnetic torque and rotation speed performance of the motor is unchanged.

Description

technical field [0001] The invention relates to the field of power electronics and electric transmission, in particular to a space vector modulation method for suppressing the common-mode voltage of a double Y-shifted 30-degree six-phase motor. Background technique [0002] When the motor is powered by a PWM (pulse width modulation) inverter, it will generate a common-mode voltage (Common-mode voltage, CMV), which can be measured by the voltage between the common point of the motor stator star winding and the midpoint of the inverter DC bus. The common-mode voltage will bring adverse effects such as leakage current, winding insulation deterioration, shaft voltage, and electromagnetic interference to the motor drive device. Therefore, it is necessary to provide a method to suppress the common-mode voltage in engineering practice. Existing methods for suppressing common-mode voltage mainly focus on changing the structure of the motor, the structure of the inverter, or improvin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/12H02P29/00
CPCH02P27/12H02P29/00
Inventor 何怡刚郑剑罗旗舞于文新吴先明谭阳红刘慧
Owner HUNAN UNIV
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