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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 used in motor generator control, electronic commutation motor control, control generator and other directions, and can solve problems such as current detection error, position detection error speed measurement error, and difficulty in guaranteeing motor speed accuracy. , to achieve the effect of eliminating errors and high speed accuracy

Inactive Publication Date: 2007-06-06
ZHEJIANG UNIV
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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

Method used

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  • Mixed speed regulating method for permanent magnetic synchronous motor
  • Mixed speed regulating method for permanent magnetic synchronous motor
  • Mixed speed regulating method for permanent magnetic synchronous motor

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Embodiment Construction

[0020] The present invention will be further explained below in conjunction with the drawings.

[0021] The hybrid speed regulation method of the permanent magnet synchronous motor of the present invention: when the permanent magnet synchronous motor is started, the traditional automatic control = vector control method (as shown in Figure 1) is adopted, and the system is realized by a speed outer loop and two current inner loops Speed ​​regulation, i d 0 rotor magnetic 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 , The direct axis component u d And rotor position angle θ 0 , From the automatic control speed regulation to the other control speed regulation (see Figure 5, Figure 6), the rotor position angle θ 0 Is the initial value, at a given speed n r Calculate from the given rotor positio...

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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 method for regulating the speed of a permanent magnet synchronous motor, in particular to a method for regulating the speed of a salient-pole permanent magnet synchronous motor which requires high speed accuracy in a steady state. Background technique [0002] At present, automatic vector control is one of the main speed regulation methods of permanent magnet synchronous motors. The speed regulation system of this method is speed loop and current loop dual-loop regulation. The current loop has two regulators: quadrature axis current and direct axis current. (As shown in Figure 1). The adjustment steps are: speed setting n r Take the error with the speed feedback n to do speed PI (proportional integral) calculation to get the stator quadrature axis current component set value i qr , This value and the feedback quadrature axis current component i q Take the error and do the quadrature axis current PI operation to get the stator quad...

Claims

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Application Information

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