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EPS motor operation

The EPS uses an efficient brush less DC type motor The EPS motor control circuit is composed of a system control CPU, FET drive circuit, H type FET bridge, power relay, fail-safe relay, electric current sensor, and the EPS motor From the input sensor signals, the CPU calculates and outputs the appropriate three-phase current for the FET drive circuit

Fig 1: EPS Motor Operation Diagram
G05987594Courtesy of AMERICAN HONDA MOTOR CO., INC.