Double-PWM motor driving control system based on bidirectional quasi-Z source

A PWM motor, drive control technology, applied in control system, AC motor control, single motor speed/torque control, etc., can solve problems such as adding dead zone

Inactive Publication Date: 2019-09-06
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention replaces the boost / buck two-stage circuit by constructing a system, can realize the boost and step-down conversion of the DC bus voltage and is stable, and due to the addition of the quasi-Z source topology, solves the problem of the traditional three-phase PWM rectifier. The problem that the switching tubes of the upper and lower bridge arms cannot be turned on at the same time and join the dead zone can control the motor to run smoothly

Method used

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  • Double-PWM motor driving control system based on bidirectional quasi-Z source
  • Double-PWM motor driving control system based on bidirectional quasi-Z source
  • Double-PWM motor driving control system based on bidirectional quasi-Z source

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following examples.

[0047] Such as figure 1 As shown, the present invention is based on the dual PWM motor drive control system of the bidirectional quasi-Z source, comprising: a controller 1, a driver 2, a dual PWM topology unit 3 based on the bidirectional quasi-Z source, a permanent magnet synchronous motor 4, and a data processor 5;

[0048] Among them, the permanent magnet synchronous motor 4 and the dual PWM topology unit 3 based on bidirectional quasi-Z sources are respectively connected to the input of the data processor 5; the output of the data processor 5 is connected to the input of the controller 1; the output of the controller 1 is connected to the driver The input of 2 is connected; the output of the driver 2 is connected with the dual PWM topology unit 3 based on the bidirectional...

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Abstract

The invention provides a double-PWM motor driving control system based on a bidirectional quasi-Z source. The system comprises a controller, a driver, a double-PWM topological unit based on the bidirectional quasi-Z source, a permanent magnet synchronous motor and a data processor, wherein the double-PWM topological unit based on the bidirectional quasi-Z source is connected with the input of thedata processor; the output of the data processor is connected with the input of the controller; the output of the controller is connected with the input of the driver; the output of the driver is connected with the double-PWM topological unit based on the bidirectional quasi-Z source; and the input of the double-PWM topological unit based on the bidirectional quasi-Z source and the input of the data processor are connected with the permanent magnet synchronous motor. According to the system, the problem that a dead zone is added due to the fact that switch tubes of an upper bridge arm and a lower bridge arm in a traditional three-phase PWM rectifier cannot be conducted at the same time can be solved; and the motor can be controlled to run stably.

Description

technical field [0001] The invention relates to the technical field of motor drive control, in particular to a dual-PWM motor drive control system based on bidirectional quasi-Z sources. Background technique [0002] Due to the advantages of bi-directional energy flow, controllable input power factor, reduction of grid side harmonics, and adjustable DC side voltage, dual PWM converters are widely used in various inverter control devices. However, the three-phase PWM rectifier can only realize the step-up conversion on the basis of the three-phase uncontrolled rectifier bridge (540V), so the adjustable range of the DC bus voltage is relatively small, and the anti-interference ability is poor, which is limited in many applications. . The output of the three-phase inverter is often connected to the motor load. As the control object motor, the back EMF is very low in the low-voltage operation state. If the DC bus voltage can be lowered at low speed, that is, the voltage value o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P27/08H02M5/458
CPCH02M5/4585H02P6/08H02P27/08
Inventor 董砚马涛荆锴高新宇黄安震
Owner HEBEI UNIV OF TECH
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