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Permanent magnet synchronous motor current tracking control method based on indeterminate frequency hysteresis and SVPWM

A permanent magnet synchronous motor and current tracking technology, which is applied in the direction of motor generator control, electronic commutation motor control, electromechanical brake control, etc., can solve the problems of large switching frequency changes, difficult design of current filtering scheme, etc., and achieve an easy-to-implement Effect

Inactive Publication Date: 2014-02-05
XIAMEN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005] There are many methods for generator speed control. Among them, the motor method based on hysteresis current tracking is widely used. The main problem of this method is that the frequency of the switch changes greatly, which makes it difficult to design the current filtering scheme.

Method used

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  • Permanent magnet synchronous motor current tracking control method based on indeterminate frequency hysteresis and SVPWM
  • Permanent magnet synchronous motor current tracking control method based on indeterminate frequency hysteresis and SVPWM
  • Permanent magnet synchronous motor current tracking control method based on indeterminate frequency hysteresis and SVPWM

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Embodiment Construction

[0024] Combine below Figure 1 to Figure 8 Describe the embodiment of the present invention, and the embodiment of the present invention specifically includes the following steps:

[0025] Step 1. Collect three-phase current, three-phase voltage, and speed signals; collect three-phase current, three-phase voltage, and speed signals; of course, these signals exist in general hardware control systems, and we only load the following steps into the control system in the controller.

[0026] Step 2. Establish a system mathematical model of the three-phase inverter;

[0027] Step 2.1. Draw the topology diagram of the three-phase inverter, and write the voltage equation of the inverter according to Kirchhoff's voltage theorem. figure 1 The IGBT is selected as the switching element, L and R are the filter inductance and the equivalent resistance, respectively. The main function of the inductance is filtering and energy storage.

[0028] U = E ...

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Abstract

The invention provides a permanent magnet synchronous motor current tracking control method based on indeterminate frequency hysteresis and SVPWM. The method aims to achieve speed control of a permanent magnet synchronous motor by means of combination of indeterminate frequency hysteresis and SVPWM on the basis of a current tracking mode according to a model of the permanent magnet synchronous motor, so that the permanent magnet synchronous motor has a relatively high response speed. The method includes the following steps of (1) collecting a three-phase current signal, a three-phase voltage signal and a rotation speed signal, (2) building a system mathematic model of a three-phase inverter, (3) positioning areas where instructional voltage and instructional current are located, (4) determining a switch tube control rule of the inverter to limit switching frequency, and (5) selecting a voltage vector enabling error currents to be smaller and the switching frequency to be low according to the position of the error currents. The method has the advantages of being simple, reliable and easy to achieve, achieving speed control of the permanent magnet synchronous motor by the adoption of the mode combining indeterminate frequency hysteresis and SVPWM, and achieving quick response during speed changing.

Description

technical field [0001] The invention relates to a control method and application of the method in the speed control of a permanent magnet synchronous motor, belonging to the field of motor control detection. Background technique [0002] Energy and environmental issues are urgent issues that need to be solved for human survival and development. With the sharp reduction of non-renewable energy sources, the utilization of green and renewable energy sources such as wind energy and solar energy is of great significance. In my country, the wind power manufacturing industry started early, but there is still a big gap compared with the international advanced level in the development of high-power units. In recent years, there have been more and more wind turbines using permanent magnet synchronous generators and full power converters; permanent magnet synchronous generators have high efficiency and power density, and the use of full power converters can expand the speed operation o...

Claims

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Application Information

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IPC IPC(8): H02P21/00
Inventor 彭彦卿陶青松张辑
Owner XIAMEN UNIV OF TECH
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