Method and system for measuring static inductance parameters of permanent magnet synchronous motor
A technology of permanent magnet synchronous motor and measurement method, applied in vector control system, control system, control generator, etc.
Active Publication Date: 2015-08-19
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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[0003] However, due to the magnetic saturation characteristics of permanent magnet synchronous motors, the direct axis (d axis) inductance and quadrature axis (q axis) inductance often change with the change of the d-q axis current. The measurement of the inductance parameters of the d-q axis of the synchronous motor is a technical problem to be solved by those skilled in the art
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[0042] The core of the present invention is to provide a method for measuring static inductance parameters of permanent magnet synchronous motors, which can realize the measurement of d-q axis inductance parameters of permanent magnet synchronous motors in static state, which is simple and quick; the present invention also provides a permanent magnet synchronous motor Measurement system for static inductance parameters.
[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without m...
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The present invention discloses a method and a system for measuring the static inductance parameters of a permanent magnet synchronous motor. The method comprises the steps of S1, inputting a DC voltage into the permanent magnet synchronous motor and adjusting the value of the U to enable the theta r to be equal to zero; S2, inputting a high-frequency voltage into the permanent magnet synchronous motor and adjusting the value of the Um to enable the Imq and Imd to reach preset values respectively; S3, acquiring the feedback high-frequency current of the permanent magnet synchronous motor in a three-phase static coordinate system and conducting the 3S / 2S conversion on the acquired current to obtain a current in a two-phase static coordinate system; S4, obtaining a current minimum value within a cycle based on the predetermined extremum algorithm; and S5, figuring out the direct-axis inductance value of the permanent magnet synchronous motor and the q-axis inductance value of the permanent magnet synchronous motor. According to the invention, the measurement on the direct-axis inductance parameter and the q-axis inductance parameter of the permanent magnet synchronous motor in the static state is realized.
Description
technical field [0001] The invention relates to the field of motors, in particular to a method and system for measuring static inductance parameters of permanent magnet synchronous motors. Background technique [0002] The control of the permanent magnet synchronous motor needs to use the inductance parameter of the permanent magnet synchronous motor, but this parameter is not easy to obtain from the user manual. In order to achieve better control of the permanent magnet synchronous motor, it is necessary to The inductance parameters of the permanent magnet synchronous motor are identified. [0003] However, due to the magnetic saturation characteristics of permanent magnet synchronous motors, the direct axis (d axis) inductance and quadrature axis (q axis) inductance often change with the change of the d-q axis current. The measurement of the inductance parameter of the d-q axis of the synchronous motor is a technical problem to be solved by those skilled in the art. Con...
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Inventor 冯江华尚敬许峻峰肖磊文宇良何亚屏张朝阳刘雄
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST