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Permanent-magnet synchronous motor system and overmodulation control method and device thereof

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor generator control, AC motor control, and electromechanical transmission control, and can solve the problems of complex calculation, affecting control performance, and not fully considering the voltage linearity in the modulation area, etc. Achieve the effects of simple overmodulation control, less calculation, and easy implementation

Active Publication Date: 2017-03-22
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology

However, most of the overmodulation algorithms in the related art are computationally complex, and the voltage linearity in the overmodulation region is not fully considered, which affects the control performance, etc.

Method used

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  • Permanent-magnet synchronous motor system and overmodulation control method and device thereof
  • Permanent-magnet synchronous motor system and overmodulation control method and device thereof
  • Permanent-magnet synchronous motor system and overmodulation control method and device thereof

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Embodiment Construction

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] The overmodulation control method of the permanent magnet synchronous motor, the overmodulation control device of the permanent magnet synchronous motor and the permanent magnet synchronous motor system proposed by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0034] figure 1 It is a flowchart of an overmodulation control method for a permanent magnet synchronous motor according to an embodiment of the present invention. Such as figure 1 As shown, the overmodu...

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Abstract

The invention discloses a permanent-magnet synchronous motor system and an overmodulation control method and device thereof. The overmodulation control method comprises the following steps of acquiring a DC bus voltage and an expected output voltage of a permanent-magnet synchronous motor; acquiring expected voltage modulation degree according to the DC bus voltage and the expected output voltage; acquiring corresponding correction voltage modulation degree according to the expected voltage modulation degree and expected voltage modulation degree-correction voltage modulation degree corresponding to the selected overmodulation algorithm; and acquiring a corrected output voltage according to the correction voltage modulation degree, and performing overmodulation control on the permanent-magnet synchronous motor according to the correction output voltage. The method is simple and a few in operation and is easy to implement; and moreover, the voltage linearity of an overmdoulation region can be fully considered, and the control performance is ensured.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to an overmodulation control method of a permanent magnet synchronous motor, an overmodulation control device of a permanent magnet synchronous motor and a permanent magnet synchronous motor system. Background technique [0002] Permanent magnet synchronous motors have been widely used in various industries due to their good control performance, high power density, and energy saving. In some applications, permanent magnet synchronous motors are required to operate in the high frequency range, and then run in the field weakening range, such as variable frequency compressors based on permanent magnet synchronous motors, fans based on permanent magnet synchronous motors, etc. [0003] In the related art, when the overmodulation algorithm is used to control the permanent magnet synchronous motor, the field weakening current at high speed operation can be reduced and the overall ef...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P27/12
Inventor 黄招彬
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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