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A space vector pulse width modulation method capable of eliminating PWM frequency harmonic waves

A technology of space vector pulse width and modulation method, which is applied in the direction of output power conversion device, control system, AC motor control, etc., can solve the problems of high cost and large volume, and achieve high voltage utilization rate, fast dynamic response, and reduced The effect of small volume

Active Publication Date: 2018-02-02
HARBIN INST OF TECH
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Problems solved by technology

When the PWM harmonic frequency is low, its volume is larger and the cost is higher

Method used

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  • A space vector pulse width modulation method capable of eliminating PWM frequency harmonic waves
  • A space vector pulse width modulation method capable of eliminating PWM frequency harmonic waves
  • A space vector pulse width modulation method capable of eliminating PWM frequency harmonic waves

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Embodiment Construction

[0027] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the present invention. within the scope of protection.

[0028] The present invention provides a space vector pulse width modulation method capable of eliminating PWM frequency harmonics. It is the same as the traditional SVPWM strategy. The vector interval is divided into six sectors of I, II, III, IV, V and VI, and the vector is an effective vector V 1 (100), V 2 (110), V 3 (010), V 4 (011), V 5 (001), V 6 (101), the zero vector V 7 (111), V 0 (000), where the zero vector is uniformly marked as V 0,7 .

[0029] Carry out vector composition according to the following vector order, can finish the SVP...

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Abstract

The invention provides a space vector pulse width modulation method capable of eliminating PWM frequency harmonic waves. The method comprises the step of: dividing a vector section into four sectors I, II, III, IV, V and VI, vectors being valid vectors V1 (100), V2 (110), V3 (010), V4 (011), V5 (001) and V6 (101) and zero vectors V7 (111) and V0 (000) and the zero vectors being marked as V0, 7 ina unified manner. In the sector I, the vector synthesis order is V0, 7V2V1V0, 7V2V1V0, 7; in the sector II, the vector synthesis order is V0, 7V3V2V0, 7V3V2V0, 7; in the sector III, the vector synthesis order is V0, 7V4V3V0, 7V4V3V0, 7; in the sector IV, the vector synthesis order is V0, 7V5V4V0, 7V5V4V0, 7; in the sector V, the vector synthesis order is V0, 7V6V5V0, 7V6V5V0, 7; in the sector VI,the vector synthesis order is V0, 7V1V6V0, 7V1V6V0. The method can effectively eliminate electromagnetic vibration of PWM frequency of a motor and greatly reduce the size of an output filter of a three-phase two-level electric inverter.

Description

technical field [0001] The invention relates to a space vector pulse width modulation (SVPWM) method, which is used for a three-phase two-level motor driver or a three-phase two-level power inverter. Background technique [0002] The traditional SVPWM strategy was proposed by Japanese scholars in the early 1980s. Such as figure 1 shown, which utilizes V 0 (000), V 1 (100), V 2 (110), V 3 (010), V 4 (011), V 5 (001), V 6 (101), V 7 (111) Eight vectors synthesize a rotated vector. The corresponding relationship between the 8 vectors and the switching tubes of the three-phase two-level inverter is as follows: figure 2 and Table 1, where the zero vector is uniformly marked as V 0,7 . For example in sector I, the effective vector V 1 (100), V 2 (110) and the zero vector V 0,7 acting together to produce the composite vector V * , the switch state at this time is as follows image 3 As shown in (a), the corresponding phase voltage is as image 3 As shown in (b), ...

Claims

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Application Information

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IPC IPC(8): H02P27/12H02M7/5395H02P23/04
CPCH02M7/5395H02P23/04H02P27/12
Inventor 徐永向黄盈亮邹继斌邹继明禹国栋
Owner HARBIN INST OF TECH
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