Protection device and protection method of driver and driver

By designing the protection devices of the detection unit, loop unit and control unit in the driver, the problem of damage to the driver when the three-phase AC current is misconnected is solved, and effective protection of the driver is achieved.

CN119654748APending Publication Date: 2025-03-18SIEMENS AG
0 Cites 0 Cited by

Patent Information

Application Number
CN202280099240.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2022-09-30
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The driver is easily damaged when the three-phase AC power is misconnected to the three-phase motor terminals, and it is difficult for the prior art to effectively protect the driver.

Method used

A protection device is designed, including a detection unit, a loop unit and a control unit. The detection unit detects the current passing through the inverter unit. The circuit unit switches on or off the DC bus under the drive of the control unit. The control unit determines whether to connect to the three-phase AC power based on the detection results and controls the operation of the inverter unit.

Benefits of technology

By determining whether three-phase alternating current is connected to the terminals of the three-phase motor, the protection device can prevent the inverter unit from turning on when the driver is powered on, avoiding the three-phase alternating current short circuit and damaging the driver, thereby effectively protecting the driver.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a protection device of a driver. The protection device comprises a detection unit (10), a loop unit (20) and a control unit (30). The detection unit can detect the current passing through the inversion unit. The loop unit can connect or disconnect the anode and the cathode of the DC bus. The control unit controls the loop unit to be connected with the direct-current bus under the condition that the driver is powered on, judges whether three-phase alternating current is connected to the wiring terminal of the three-phase motor or not according to the detection result of the detection unit, and if the three-phase alternating current is connected to the wiring terminal of the three-phase motor, stops the inverter unit from being started when receiving a starting command, and stops the inverter unit from being started when receiving the starting command. And if the wiring terminal of the three-phase motor is not connected with the three-phase alternating current, the control loop unit disconnects the direct-current bus and drives the inverter unit to operate after receiving a starting command. The protection device of the driver can protect the driver when the three-phase alternating current is wrongly connected to the wiring terminal of the three-phase motor. The invention further provides the driver with the protection device and a protection method of the driver.
Need to check novelty before this filing date? Find Prior Art