A Comparative Study of Over-Current Sensing for Traction Inverters

Table 1

Over-current detecting locations.

	Inverter 3-phase over-current	Inverter high-low side short-circuit	Inverter DC link short-circuit
Magnetic field-based	Suitable	Can be bulky	Suitable
Shunt resistor-based	Suitable	Suitable	Suitable
Detection on power semiconductor		Suitable
Detection with gate drive		Suitable