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A method and system for eliminating steady-state error of current predictive control of permanent magnet synchronous motor

A permanent magnet synchronous motor and current prediction technology, which is applied in the control system, vector control system, motor generator control, etc., can solve the problems of complex parameter setting process and large amount of online calculation, so as to avoid large amount of online calculation and suppress The effect of inaccurate model parameters

Active Publication Date: 2018-09-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to address the shortcomings of the above-mentioned background technology and provide a permanent magnet synchronous motor current prediction control steady-state error elimination method and system, which effectively suppresses the current regulation steady-state caused by inaccurate model parameters and time-varying nonlinearity error, which solves the technical problems in the prior art that the current predictive control algorithm of permanent magnet synchronous motor depends on the accurate model of the object, the amount of online calculation is large, and the parameter setting process is complicated

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  • A method and system for eliminating steady-state error of current predictive control of permanent magnet synchronous motor
  • A method and system for eliminating steady-state error of current predictive control of permanent magnet synchronous motor
  • A method and system for eliminating steady-state error of current predictive control of permanent magnet synchronous motor

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Embodiment Construction

[0066] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0067] The traditional permanent magnet synchronous motor vector control system such as figure 1As shown, it includes: a speed controller 1, a current controller 2, a Park inverse transform module 3, a space vector modulator 4, a voltage source inverter 5, and a Park transform module 6 that determine the q-axis current reference value according to the motor speed correction value , a Clarke transformation module 7, a rotational speed calculation module 8, and a position sensor 9 for detecting the position of the motor rotor. The input terminal of the Clarke transformation module 7 receives the sampled value of the three-phase stator current of the permanent magnet synchronous motor 10, the output terminal of the Clarke transformation module 7 is connected to the input terminal of one side of the Park transformation module 6, and the other side input...

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Abstract

The invention discloses a permanent-magnet synchronous motor current predictive control steady-state error elimination method and a permanent-magnet synchronous motor current predictive control steady-state error elimination system, and belongs to the technical field of AC servo motor control. According to the invention, the d-axis or q-axis current error is corrected in a sectional way, and a voltage for generating an inverter driving signal is predicted according to the corrected d-axis or q-axis current reference value and the d-axis or q-axis actual current. Therefore, current adjustment steady-state error caused by inaccurate model parameters and time-varying nonlinearity can be inhibited effectively, there is no need for online parameter identification, increase in burden of the CPU due to large amount of online calculation is avoided, and current loop bandwidth improvement is limited.

Description

technical field [0001] The invention discloses a permanent magnet synchronous motor current prediction control steady-state error elimination method and system, which are used for high-performance current control of a permanent magnet synchronous motor and belong to the technical field of AC servo motor control. Background technique [0002] In recent years, permanent magnet synchronous motors have gradually become the mainstream of AC servo motors due to their advantages such as simple structure, high power density, high torque-to-current ratio, and easy maintenance. The permanent magnet synchronous motor is a complex system with nonlinear, strong coupling, and time-varying parameters. It is often subject to strong external interference during operation. Therefore, it is very difficult to achieve high-precision servo control of the permanent magnet synchronous motor. At present, the permanent magnet synchronous motor generally adopts the field-oriented vector control algori...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14
CPCH02P21/14
Inventor 任建俊叶永强武玉衡曹永锋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS