A common-mode voltage suppression method and device using virtual pulse vibration vector

A technology of vector direction and pulse vibration, which is applied in the field of direct torque control of matrix converters, can solve the problems of increasing the volume and weight of the motor system, achieve the effects of ensuring power density, suppressing common-mode voltage, and solving both volume and weight increases

Active Publication Date: 2022-06-24
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0004] The present invention solves the technical problem of increasing the volume and weight of the motor system in the prior art by providing a common-mode voltage suppression method and device using a virtual pulse vibration vector, and realizes the technical effect of ensuring the power density of the matrix converter

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  • A common-mode voltage suppression method and device using virtual pulse vibration vector
  • A common-mode voltage suppression method and device using virtual pulse vibration vector
  • A common-mode voltage suppression method and device using virtual pulse vibration vector

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Embodiment Construction

[0088] The embodiment of the present invention solves the technical problem of increasing the volume and weight of the motor system in the prior art by providing a common-mode voltage suppression method and device using a virtual pulse vibration vector, and realizes the technology of ensuring the power density of the matrix converter Effect.

[0089] The technical solution in the embodiment of the present invention is to solve the above-mentioned problems, and the general idea is as follows:

[0090] Synthesize the virtual pulse vibration vector with the rotation vector with the opposite rotation direction, and establish a switch table using the virtual pulse vibration vector, select the virtual pulse vibration vector synthesized by the rotation vector by querying the switch table, and use the characteristic that the common mode voltage of the MC rotation vector is zero , the common mode voltage can be effectively suppressed, and at the same time, no hardware device is added, ...

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Abstract

The invention discloses a common-mode voltage suppression method and device using a virtual pulse vibration vector. Synthesize the virtual pulse vibration vector with the rotation vector with the opposite rotation direction, and establish a switch table using the virtual pulse vibration vector, select the virtual pulse vibration vector synthesized by the rotation vector by querying the switch table, and use the characteristic that the common mode voltage of the MC rotation vector is zero , the common mode voltage can be effectively suppressed, and at the same time, no hardware device is added, which avoids the increase of volume and weight of the motor system as in the prior art, and ensures the power density of the matrix converter. Moreover, it also maintains the advantages of DTC independent of motor parameters, simple calculation, and good dynamic performance.

Description

technical field [0001] The invention relates to the technical field of power converter control for driving motors, in particular to a method and device for direct torque control of a matrix converter capable of suppressing common-mode voltage. Background technique [0002] The matrix converter (MC)-fed permanent magnet synchronous motor (PMSM) system combines the advantages of high power density, good speed regulation performance of PMSM, compact structure of MC, and small harmonic pollution to the power grid. Therefore, it is widely used in the high-end equipment manufacturing industry has been widely used. Direct torque control (DTC) has the advantages of simple control structure, less influence by motor parameters, and good dynamic performance. It has natural advantages when applied to MC with a large number and variety of state space vectors. Existing MC-DTC strategies usually only use the valid vector of MC, or the combination of valid vector and zero vector, and the r...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/30H02P27/06H02M1/12H02M1/42
CPCH02P21/30H02P27/06H02M1/12H02M1/42Y02B70/10
Inventor 邓惟滔谢文武彭鑫严太山朱鹏
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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