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Mixed speed regulating method for permanent magnetic synchronous motor

A technology of permanent magnet synchronization and speed regulation method, which is applied in the direction of motor generator control, electronic commutation motor control, control generator, etc., and can solve problems such as current detection error, position detection error, speed measurement error, and difficulty in ensuring the accuracy of motor speed , to achieve the effect of eliminating errors and high speed accuracy

Inactive Publication Date: 2008-12-03
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The disadvantages of this speed regulation method are: there are position detection errors, and then there are speed measurement errors; there are current detection errors, and then there are errors in the AC and D axis currents fed back; the performance of the regulator is related to the proportional and integral parameters, and a set of PI parameters Can not take into account the dynamic and steady-state performance of the motor
[0004] The existence of position, speed measurement, and current feedback errors and the characteristics of the regulator to adjust according to the error make the motor speed fluctuate around the given value, or even deviate from the given value, and the accuracy of the motor speed is difficult to guarantee

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Embodiment Construction

[0020] Further illustrate the present invention below in conjunction with accompanying drawing.

[0021] The hybrid speed regulation method of permanent magnet synchronous motor of the present invention: when permanent magnet synchronous motor starts, adopt traditional self-control=type vector control method (as Fig. 1), system is realized by a speed outer loop and two current inner loops Speed ​​regulation, for i d 0 Rotor field orientation scheme, the vector diagram is shown in Figure 2.

[0022] When the motor enters a steady state, when the feedback speed reaches a given speed value, the quadrature axis component u of the output voltage vector is locked q , direct axis component u d and rotor position angle θ 0 , from the self-controlled speed regulation to the other-controlled speed regulation (see Figure 5, Figure 6), and the rotor position angle θ at the moment of cut-in 0 is the initial value, according to the given speed n r Calculated from the given rotor positi...

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Abstract

A mixed speed regulating method of permanent magnet synchronous motor includes applying self-control vector to control speed when permanent magnet synchronous motor is started up and switching said self-control of speed regulation onto separate- control of speed regulation when said motor enters steady-state and feedback rotary speed is on set speed value, outputting voltage vector of relevant frequency directly according to set speed when separate-control of speed regulation is applied and making control of speed regulation be in matching to that speed is controlled by open-loop control.

Description

technical field [0001] The invention relates to a speed regulation method of a permanent magnet synchronous motor, in particular to a speed regulation method of a salient pole type permanent magnet synchronous motor which requires high speed precision in a steady state. Background technique [0002] At present, self-controlled vector control is a main speed regulation method of permanent magnet synchronous motor. The speed regulation system of this method is double-loop regulation of speed loop and current loop. Among them, the current loop has two regulators of quadrature axis current and direct axis current. (As shown in Figure 1). The adjustment steps are: speed given n r Take the error from the speed feedback n to do the speed PI (proportional integral) operation to get the stator quadrature axis current component given value i qr , this value is related to the feedback quadrature axis current component i q Take the error and do the quadrature axis current PI calculat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/14H02P21/20
Inventor 吴茂刚赵荣祥牛洪海尚喆
Owner ZHEJIANG UNIV