Circuit/System Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. Each drive motor control module monitors its internal high voltage sensor for correct operation; no external circuits are involved. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.