What is the use of the fourth leg, the one with igbt in series with the diode, in the infineon power module?

Question

The circuit shown below is the schematic of infineon PIM module. I am specifically interested in FP15R12W1T4. From the schematic I could understand all elements other than the 4th leg which has an igbt in series with a diode. I am new to this field. I assume, that leg and terminals are provided to feedback the present voltage level under a specified switching frequency.

score 2 · Accepted Answer · answered Jan 18 '20 at 02:53

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By applying a DC shunt to the battery, the motor instead of free wheeling can regenerate and brake the motor. using the back EMF of the motor/generator.

There are different implementations including Battery Regen and single phase Remanence braking.

This is why there is a single B phase brake on a 3 phase UVW phase rectifier or bridge driver.

answered Jan 18 '20 at 02:53

Tony Stewart EE75

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So, is it possible to use the B phase to establish dynamic braking or plugging? – Vivek Vijayan Jan 18 '20 at 03:56
That’s what its for – Tony Stewart EE75 Jan 18 '20 at 03:57

What is the use of the fourth leg, the one with igbt in series with the diode, in the infineon power module?

1 Answers1