Short circuit protection with shunt resistor activated when short-circuit current reaches a certain value, shutting down the system by turning off the n-side switch, and can be repeatedly used after the short circuit.

Can be cut off by not breaking the experimental inverter with voltage rating of 1200V, rated current of 200A, and maximum module's energy of 2J. (Fig. 3-9 not shown)

Can be reused after the circuit has been short-circuited.

Maximum short-ciruit withstand time (3us) > Delay times of completely turning off the module

Maximum Current (1kA)

Pic showing the module cut before 3us and showing delay times in each part (in 8_report_GDDT)

Acknowledgement. This method is the simple and cheap. However, there are some methods which are thought to be faster and safer, consequently more expensive.

Ref1

Ref2

Fig. 3-15(b)(result), Fig. 3-6(Maximum), Cut off around 1kA

After shutting off the device, when turning it on agian, the system works fine. (Fig. 3-17, Energy<2J)

A warrant: Voltage<1200 (6_report_SC_slide18,19,20), Energy<2J

Can be turned off (N-side MOSFET waveforms from Fig. 3-15, Explain by using the circuit configuration)

Condition of graph

Short Circuit Protection of Inverter with Shunt Resistor Method

Criteria: Maximum short-circuit current of 1000A, device's voltage < 1200V, Turn-off time should be fast enough not to damage the device. This method is cheap.

Introduction: Power Electronics based converter applications contain high-frequency switching noise. When a device is switched on and off at the carrier frequency, voltage surges and current spikes can occur due to stray impedances.

Assumption (Descriptive): Resistor sensing, current transformer, Vce sensing from 3_9_SC_IEEE

Price

Pros and cons of the 3 methods in 3_9_SC_IEEE. Showing that why we chose resistor sensing.

Experimental methods (set-up conditions) (on the right)

Experimental results (graphs and tables)

Analysis of results so as to support the 3 steps mentioned in assumtion

to show how it works sucessfully, it has to follow the 3 steps on the right

Summary: Short circuit protection with shunt resistor activated when short-circuit current reaches a certain value, shutting down the system by turning off the n-side switch, and can be repeatedly used after the short circuit.

Acknowledgement

Future application recommendation