Yuan Zhang's scientific contributions
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Publications (3)
A scheme of thermal estimation is proposed for SiC power MOSFET devices and applied in overcurrent fault protection. Initial junction temperature before fault occurrence is estimated by finding the instantaneous on-state resistance which is temperature sensitive and can be used as an indicator for device junction temperature estimation. Based on th...
The electronic circuit breaker used in DC microgrids are required to work within their safe operating areas bounded by temperature, voltage and current limits. Traditional approach managed to protect these switches through rapid current cut-off operations at over-load or fault situations, but failing to avoid the disturbance induced by transient cu...
Citations
... In order to simplify the previous techniques, Zhang and Liang [31], [32] proposed a slightly modified approach, which calculates instantaneous ON-state resistance and then the temperature of a junction. Despite some improvements and advantages, this technique requires additional measuring and signal processing circuit for each switch, which is inconvenient for simple and compact solutions. ...
... In order to simplify the previous techniques, Zhang and Liang [31], [32] proposed a slightly modified approach, which calculates instantaneous ON-state resistance and then the temperature of a junction. Despite some improvements and advantages, this technique requires additional measuring and signal processing circuit for each switch, which is inconvenient for simple and compact solutions. ...
... The gate signals of S 1 and S 2 were generated using a single gate driver, as shown in Fig. 10. The short circuit current detection and protection were operated using a desaturation detection circuit [19]- [20]. Fig. 12 presents the experimental results of the proposed SSCB prototype for operation in both directions. ...
