Complex-vector-regulator-based low-carrier-ratio control method for permanent-magnet synchronous motor

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor control, vector control system, motor generator control, etc., can solve the problems of current sampling error increase and current coupling aggravation, so as to reduce current sampling error and improve Robustness, the effect of enhancing stability

Inactive Publication Date: 2018-12-07
YANSHAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-carrier ratio control method for permanent magnet synchronous motors based on a complex vector regulator, which solves the problems of aggravated current coupling and increased current sampling errors when the motor is running at a low carrier ratio, and at the same time, improves the control system's response to the motor The ability to change parameters improves the overall control performance of the system

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  • Complex-vector-regulator-based low-carrier-ratio control method for permanent-magnet synchronous motor
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  • Complex-vector-regulator-based low-carrier-ratio control method for permanent-magnet synchronous motor

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[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] A kind of low carrier ratio control method of permanent magnet synchronous motor based on complex vector regulator of the present invention, its specific steps are:

[0045] Step 1. Construct a discrete current regulator and permanent magnet synchronous motor electric drive control system considering one beat lag. The overall control block diagram is attached figure 1 shown;

[0046] Step 2. According to the speed loop PI regulator, calculate the required d-axis and q-axis reference command current i in the synchronous coordinate system dq ;

[0047] Step 3. Make a difference between the reference command current in the dq synchronous coordinate system and the current sampled by the current detection module to obtain the error current ΔI e s (z), and input to the complex vector current regulator, the regulator output is a voltage sig...

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Abstract

The invention relates to a complex-vector-regulator-based low-carrier-ratio control method for a permanent-magnet synchronous motor. The method comprises: constructing a complex vector current regulator and an electric drive control system of a permanent-magnet synchronous motor; according to a speed loop PI regulator, carrying out calculation to obtain d-axis and q-axis reference command currentsin a synchronous coordinate system; difference processing is carried out on the reference command currents in the dq synchronous coordinate system and a current obtained by sampling by a current detecting module to obtain an error current, the error current is inputted into the complex vector current regulator, and the regulator outputs a voltage signal; an average voltage value outputted by thecurrent regulator within a sampling cycle is estimated and an active damping state feedback amount is added at an average voltage output terminal to form a system modulation signal; and the system modulation signal is subjected to SVPWM modulation to generate a PWM pulse wave and thus a three-phase full-bridge inverter is controlled to output an actual voltage, and the SVPWM inverter is connectedto the permanent-magnet synchronous motor to drive the motor.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motor control, in particular to a low carrier ratio control method of a permanent magnet synchronous motor based on a complex vector regulator. Background technique [0002] Permanent magnet synchronous motors are widely used in the AC servo field because of their high efficiency, small size, high power density, and small torque ripple. Vector control has been widely used in the field of high-performance permanent magnet synchronous servo control. The synchronous proportional-integral regulator based on the synchronous coordinate system can realize the adjustment and tracking of the current command in a large speed range, and the steady-state tracking performance is good. , thus becoming the industry standard for AC motor current control. [0003] In the synchronous coordinate system of the motor, there is cross-coupling in the d and q axes, and as the speed increases, the proportion o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P25/024H02P27/08
CPCH02P27/08H02P2205/01H02P2207/05H02P21/22H02P25/024
Inventor 张纯江王思清于安博刘利
Owner YANSHAN UNIV
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