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
CN110212816AInactive Publication Date: 2019-09-06HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2019-09-06
Estimated Expiration
Not applicable · inactive patent

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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.
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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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