Motor driving inversion device, bootstrap charging method, bootstrap charging equipment and storage medium

A technology of inverter device and motor drive, which is applied in the direction of AC motor control, output power conversion device, electrical components, etc. Effect

Pending Publication Date: 2022-03-08
SUZHOU WEICHUANG ELECTRICAL EQUIP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application provides a motor-driven inverter device, a bootstrap charging method, equipment, and a storage medium to solve the problem of large instantaneous surge current during bootstrap charging

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  • Motor driving inversion device, bootstrap charging method, bootstrap charging equipment and storage medium
  • Motor driving inversion device, bootstrap charging method, bootstrap charging equipment and storage medium
  • Motor driving inversion device, bootstrap charging method, bootstrap charging equipment and storage medium

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Embodiment Construction

[0040] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0041] Because in the prior art, the lower bridge IGBT is controlled to be continuously turned on to charge the bootstrap capacitor, there is a problem of large instantaneous surge current.

[0042] The applicant considers to simultaneously control the conduction of the lower bridge IGBTs of the three drive units to charge the bootstrap...

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Abstract

The invention relates to a motor driving inversion device, a bootstrap charging method, bootstrap charging equipment and a storage medium, and relates to the field of power electronics. The motor driving inversion device comprises a power supply module, a control module, an inversion module and a motor, the inversion module comprises three paths of driving units and an output unit, each driving unit comprises a bootstrap current-limiting resistor, a bootstrap diode, a bootstrap capacitor, an upper bridge optocoupler, a lower bridge optocoupler, an upper bridge IGBT and a lower bridge IGBT, and the control module is connected with the output unit. And the control unit is used for controlling the lower bridge optocoupler in each driving unit to output a control signal to the lower bridge IGBT to charge the bootstrap capacitor, and the control signal is a PWM signal with the duty ratio increased from a first preset duty ratio to a second preset duty ratio along with time increase. The method is used for solving the problem that the instant impact current of bootstrap charging is large.

Description

technical field [0001] The present application relates to the field of power electronics, and in particular to a motor-driven inverter device, a bootstrap charging method, equipment, and a storage medium. Background technique [0002] In the three-phase inverter circuit drive system, the floating control power supply can be realized through the bootstrap charging method, which can reduce the number of isolated power supplies from four to one. [0003] However, in the prior art, when the floating control power supply is realized through the bootstrap circuit, in the initial charging stage, it is necessary to control the lower bridge IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) to be continuously turned on through software, and to maintain sufficient time to fully charge the bootstrap capacitor. However, in this way, the instantaneous inrush current is large. When the power supply is constant, it may cause voltage hiccups or a sharp drop in volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M1/088H02M1/32H02P27/08
CPCH02M7/53871H02M1/088H02M1/32H02P27/08
Inventor 朱小超何劲贤陶旭东
Owner SUZHOU WEICHUANG ELECTRICAL EQUIP TECH
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