一种固态断路器以及电流控制系统
By integrating a gate drive circuit and a thermistor sensor into a solid-state circuit breaker, and combining the temperature signal to correct the magnetic field signal, the problem of insufficient detection accuracy is solved, and high-precision current detection and control are achieved, which is suitable for μs-level protection of electric drive systems in new energy vehicles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG CHINT ELECTRIC CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing solid-state circuit breakers suffer from insufficient detection accuracy during current detection and control. In particular, external sensors are significantly affected by core losses, parasitic parameters, and temperature drift, while integrated magnetic sensors lack sufficient anti-interference capabilities.
The gate drive circuit and the thermistor sensor are integrated on the substrate. The first sensor unit is embedded in the source metal layer groove of the control chip. The magnetic field signal is corrected by combining the temperature signal. The anti-interference capability is improved by shielding and encapsulation layers. The bonding point status is monitored by a TMR sensor in the Z-axis direction.
It improves the accuracy and real-time performance of current detection and control, reduces the size of the device, and achieves μs-level protection in the electric drive system of new energy vehicles, meeting the safety requirements of electric vehicles.
Smart Images
Figure CN224521034U_ABST