High-voltage servo driver discharge device based on high-resistance isolation sampling
By combining high-impedance isolated sampling with SiC MOS transistors, the problem of servo drivers being susceptible to interference and having slow response speed under high voltage is solved, achieving rapid discharge and improved stability, and protecting the servo driver from bus voltage fluctuations.
CN120999547APending Publication Date: 2025-11-21LIANYUNGANG JARI ELECTRONICS CO LTD
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Patent Information
- Application Number
- CN202511226797.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2025-11-21
AI Technical Summary
Technical Problem
Existing servo drives are susceptible to interference under high voltage and have slow discharge response speed, resulting in poor system stability and shortened service life.
Method used
By employing a high-impedance isolation sampling design and SiC MOS transistors, the high voltage of the bus is reduced to a sampling voltage through an isolated power supply module. A comparator and an isolation drive circuit are used to control the on/off state of the discharge resistor to achieve rapid discharge.
Benefits of technology
It improves the anti-interference capability and discharge response speed of the servo drive, enhances the stability and safety of the system, and protects the servo drive from the instantaneous high voltage impact of bus voltage fluctuations.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a high-voltage servo driver discharge device based on high-resistance isolation sampling, and the discharge device employs a high-resistance isolation bus sampling design, a bus high voltage is scaled down into a sampling voltage, and the sampling voltage is compared with a discharge threshold voltage through a comparator after conditioning. And the output of the comparator controls the grid voltage of the SiC MOS tube through the isolation driving circuit, so that the on-off of the bleeder resistor connected between the bus voltage and the ground is controlled, and the purpose of discharging when the bus voltage exceeds a threshold value is achieved. The device can protect the high-voltage servo driver from instantaneous high-voltage impact of bus fluctuation, back electromotive force and the like, and normal work of the servo driver is maintained.
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