DEVICE TO CONTROL ELECTRIC MOTOR OF ELECTROMECHANICAL STEERING BOOSTER Russian patent published in 2007 - IPC B62D5/04 

FIELD: transport engineering.

SUBSTANCE: invention relates to electromechanical systems of vehicles designed for steering gears to reduce control forces on steering wheel. Proposed device includes inverter connected with three-phase synchronous motor and microprocessor inverter control unit. Inputs of the latter are connected through interface units with electric motor rotor position, speed and through pickups and tachometer. Resistance current sensor in inverter supply circuit and inverter current metering unit are provided, output of the latter is connected directly with signal input of inverter control unit, and inverter temperature-sensitive element is provided being made in form of thermoresistor and connected to protective input of inverter control unit. Said units are arranged in housing provided with cover and installed in power compartment of automobile, being arranged on four-layer printed-circuit board fixed inside housing. Mounted on side of plate pointed to housing are heated current sensor, inverter temperature-sensitive element and power transistor module. These devices are potted with heat-conducting compound. Mounted on side of plate pointed to cover are other elements of inverter, inverter control unit, interface units, inverter supply control unit, inverter current metering unit and four connectors. Two connectors are designed to supply power from storage battery and to connect outputs of speed meter and tachometer to interface units, and two others are designed for taking off three phase voltage from inverter to electric motor and to connect signal and supply circuits of torque and electric motor rotor position pickups to interface units. Heavy current conductors are made in form of layer-by-layer paths of plate contacting in heat-conducting compound.

EFFECT: improved mass and dimensions characteristics, increased operation reliability.

2 cl, 4 dwg