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Light Duty Technology Cost Analysis, Power - US Environmental ...

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The traction motor control unit (Figure D-13) contains six (6) Mitsubishi smart Insulated<br />

Gate Bipolar Transistor (IGBT) power modules and a control circuit board assembly.<br />

Two (2) transfer blocks are built-up of stamped circuit traces and then over-molded to<br />

link the IGBT high current leads together. Each of the IGBT’s twelve (12) control leads<br />

is soldered to the control circuit board. The IGBT mounting faces consist of coated<br />

copper for effective heat transfer to the transaxle case. The cover, circuit board, and base<br />

plate are secured together using several threaded fasteners and studs.<br />

Figure D-13: Traction Control Unit Components<br />

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