Investigation of Current Mirror Based Overcurrent Protection for 1200V 800A High Power SiC MOSFET Modules

Cui, Yujia; Zhang, Zhe; Yi, Peizhong; Wei, Lixiang

doi:10.1109/ecce.2019.8912296

Cited by 11 publications

(1 citation statement)

References 7 publications

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“…Protection methods against overcurrent or SC fault have been proposed in numerous previous studies. There are methods of directly measuring current using a shunt resistor or a current sensor [15]- [18], monitoring the change of / [19]- [22], monitoring the gate-source voltage and gate charge characteristics [23] and using sense FET or a current mirror [24], [25]. Among these techniques, the most common method applied to the automotive three-phase lowvoltage MOSFET driver circuit is the voltage from the drain to the source monitoring [26]- [30].…”

Section: Introductionmentioning

confidence: 99%

Online Short-Circuit Protection Strategy of an Electric Powerpack for Electric Oil Pump Applications

2021

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With the trend towards the miniaturisation and electrification of automotive components, the electric oil pump (EOP) is generally designed as an integrated powerpack in which a motor and an electronic control unit (ECU) are combined into an integrated system, with the electronic components of the ECU exposed to harsher temperature environments. The critical weakness of the traditional design is short-circuit failures, and the most common protection method is monitoring. However, this method cannot predict the accurate protection current, indicating that the fault detection level and short-circuit current (SCC) may change depending on the operating temperature and load condition to which the devices are subject. In this case, switching devices can be destroyed or deteriorated if they are unexpectedly placed outside of the protection range. This study proposes an online short-circuit protection method in which the optimal fault threshold can be controlled in real time, in accordance with changes in temperature and load conditions. To this end, this study investigates the cause of fluctuations in SCC and analyses the protection range and qualification time for SCC through worst-case analysis. To determine the optimal fault threshold, the SCC waveform is estimated through circuit analysis and a method of estimating ( ), which is the cause of SCC fluctuation, is proposed based on simulation and experimental data. Finally, according to ( ), optimal thresholds are derived and the proposed methods are experimentally-verified. It is found that the SCC could be predicted and managed within the protection range by the proposed new protection method.INDEX TERMS Automotive electric powerpack, diagnosis, electric oil pump, gate drive circuit, junction temperature, optimal fault threshold, short-circuit protection, short-circuit current waveform.

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Section: Introductionmentioning

confidence: 99%

Online Short-Circuit Protection Strategy of an Electric Powerpack for Electric Oil Pump Applications

2021

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Current detection circuit in multiple parallel connection circuit of high‐power semiconductor modules

Katoh

Nagasu

Suzuki

et al. 2021

Electrical Engineering Japan

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We are developing current-detection technology that directly measures the main current of a high-power semiconductor module using the wiring inductance of the module. In a previous study, we proposed a circuit that detects current by integrating the voltage generated in the wiring inductance between the sense emitter and emitter terminals of the IGBT (Insulated Gate Bipolar Transistor) module. In this study, we developed a total current detection scheme for parallelconnected modules. The basic principle of this scheme is that the total current can be obtained by the total of each voltage generated on the wiring inductance of each module. It was realized by using only one integrating circuit. A challenge for this study was avoiding reflection caused by impedance mismatch. We addressed this by adding a termination resistance with the same value as the characteristic impedance.

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Short-circuit protection method for medium-voltage SiC MOSFET based on gate–source voltage detection

2020

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Investigation of Current Mirror Based Overcurrent Protection for 1200V 800A High Power SiC MOSFET Modules

Cited by 11 publications

References 7 publications

Online Short-Circuit Protection Strategy of an Electric Powerpack for Electric Oil Pump Applications

Online Short-Circuit Protection Strategy of an Electric Powerpack for Electric Oil Pump Applications

Current detection circuit in multiple parallel connection circuit of high‐power semiconductor modules

Short-circuit protection method for medium-voltage SiC MOSFET based on gate–source voltage detection

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