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Parameter setting method for double-closed-loop vector control PI regulator of permanent magnet synchronous motor

A permanent magnet synchronous motor, vector control technology, applied in vector control system, motor generator control, electronic commutation motor control and other directions, can solve the problem of not considering the inverter current sampling, can not guarantee the control performance of the servo system, etc. To achieve the effect of strong versatility and accurate tuning

Inactive Publication Date: 2019-05-14
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the PI parameters that are mostly dependent on experience and repeated trial and error: the influence of non-ideal factors such as inverters and current sampling is not considered, and the control performance of the servo system cannot be guaranteed

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  • Parameter setting method for double-closed-loop vector control PI regulator of permanent magnet synchronous motor
  • Parameter setting method for double-closed-loop vector control PI regulator of permanent magnet synchronous motor
  • Parameter setting method for double-closed-loop vector control PI regulator of permanent magnet synchronous motor

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Embodiment Construction

[0032] In order to make the technical solutions and advantages 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.

[0033] S1: Establish current loop PI regulator 1, speed loop PI regulator 2, coordinate inverse transformation module 3, coordinate transformation module 4, PWM module 5, inverter 6, permanent magnet synchronous motor 7, encoder 8 and current sensor The model of the permanent magnet synchronous motor vector control system in 9, the structure diagram of the permanent magnet synchronous motor vector control system is shown in figure 1 As shown, the modular schematic diagram of the permanent magnet synchronous motor vector control system is shown in figure 2 shown.

[0034] S2: Due to the existence of current sensors, conditioning circuits, and ADC modules in the actual motor control system,...

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Abstract

The invention discloses a parameter setting method for a double-closed-loop vector control PI regulator of a permanent magnet synchronous motor. A current inner loop system is corrected into a first-order system by utilizing a pole-zero cancellation principle in a current loop closed-loop transfer function; a proportional coefficient and an integral coefficient of a current loop PI regulator are obtained through the current loop closed-loop transfer function; when two constraint conditions of enabling the slope at a cut-off frequency of a speed loop open-loop transfer function to be -20 dB / decand obtaining the maximum phase angle margin are met, a proportional coefficient and an integral coefficient of a speed loop PI regulator are determined; and parameters of the speed loop PI regulatorare obtained. An automatic control related theory is combined, and a theoretical basis is provided for setting the PI parameters; change relations between the PI parameters, and a motor parameter-current loop bandwidth and a system performance index-damping factor are revealed; the PI parameters can be set for different motor systems more flexibly and accurately; and therefore, the universality is high.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a parameter tuning method for a PI regulator of double closed-loop vector control of a permanent magnet synchronous motor. Background technique [0002] With the development of power electronics technology and AC motor control technology, AC motors have been widely used in various industrial fields. Because the permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, low loss, high efficiency and high power factor, it is more and more favored by people. With the rapid advancement of industrial intelligence, higher requirements are put forward for the speed and precision of permanent magnet synchronous motor servo system control. [0003] At present, vector control is the most widely used permanent magnet synchronous motor control strategy. There are three regulators in the vector control system: one speed loop regulator and two ...

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Application Information

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IPC IPC(8): H02P21/00
Inventor 张巧芬刘彦呈郭晨包芳泉郭昊昊王川梁晓玲张勤进
Owner DALIAN MARITIME UNIVERSITY
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