Motor Control Module

Location 

The drive motor and the auxiliary transmission fluid pump motor are located within the transmission. The drive motor is controlled by the motor control module. The motor control module is contained within the power inverter module. Also contained within the power inverter module is the hybrid/EV powertrain control module 1 micro-processor.

Operating Functions 

The motor control module operates the motor based upon hybrid/EV powertrain control module 1 commands. the motor control module controls the speed, direction, and output torque of the drive motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors.

Communication and Hosted Diagnostics 

In addition to the internal serial peripheral interface bus communication circuit that the hybrid/EV powertrain control module 1 and the motor control module control use to communicate, the motor control module also communicates on the hi-speed and hybrid serial data circuits. The motor control module does not store its own Diagnostic Trouble Code (DTC) information. The hybrid/EV powertrain control module 1 will store motor control module associated DTC information for retrieval by a scan tool.

Circuit Inputs 

In addition to data parameters, the motor control module monitors its respective motor for voltage, current, speed, direction and temperature. Additionally, the motor control module monitors the insulated gate bipolar transistor components for temperature and proper operation. Some of the motor control module operation data is shared with the hybrid/EV powertrain control module 1.

Circuit Outputs 

The motor control module controls its respective insulated gate bipolar transistor driver board that in-turn controls the motor. The motor operates using 3 - phase AC electricity. Three cables connect the drive motor to the power inverter module. Each individually shielded cable is orange in color to alert the technician that the potential for high voltage is present.