STEP DOWN CONVERTER-EMBEDDED ELECTROMOTIVE POWER STEERING ENGINE CONTROL UNIT CAPABLE OF ENABLING THE STABLE OPERATION OF AN ELECTROMOTIVE POWER STEERING

摘要

PURPOSE: A step down converter-embedded electromotive power steering engine control unit is provided to stabilize battery voltage at a specified level by constituting a simplified step down converter and embedding the converter into the electromotive power steering engine control unit.;CONSTITUTION: A step down converter-embedded electromotive power steering engine control unit comprises a microcontroller(S20), an interface circuit(S21), a three phase half-bridge inverter(S22), and a step down converter. The step down converter is composed of an inductor(L1), a capacitor(C1), one FET(Q1) and one diode(D1). The step down converter outputs the voltage of 42Vdc by receiving the voltage of 220Vdc-490Vdc. The microcontroller adjusts the duty ratio of the control signal applied to the FET.;COPYRIGHT KIPO 2010