Circuit/System Description

The power steering control module (PSCM) continuously monitors the voltage and current levels being commanded to the electric power steering (EPS) motor. The PSCM incorporates a DC amplifier that boost the voltage on the pulse width modulated (PWM) control circuits to drive the brushless, EPS motor. The PSCM compares the desired and actual current levels to detect malfunctions in the EPS motor, or the circuits to the motor.