Title: Vehicle electric booster steering system controller
Application Number: 200610113709 Application Date: 2006.10.13
Publication Number: 1937397 Publication Date: 2007.03.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02P7/00;H02P8/14;G05B15/02;B62D5/04
Applicant(s) Name: Tsinghua Univ. Address:
Inventor(s) Name:
Attorney & Agent:
Abstract:
    The force-assistance executor is a DC permanent magnet motor with brushes and supplies by 12 V battery system. The controller consists of micro-controller module, signal processing module, output control module, power supply module, relay with its driver module, H bridge module, grid driver module and motor current testing module. The characteristic of this invention is that the H bridge module adopts two P-trench type power electronic devices and two N-trench types. The source electrodes of the former lead to the positive terminal of the battery while the latter lead to the negative. The drain electrodes of each group of P type electronic devices are jointed to the drains of the same group of N type. Thus, the power supply module of the grid driver module needs no voltage-raising module. This simplifies the structure of the controller, lowers its cost and raises its reliability.
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