Fault tolerant motor drives for powered wheelchairs

Author

Prasad, Rajeev K. ; Aylor, James H. ; Johnson, Barry W.

Author_Institution

Dept. of Electr. Eng., Virginia Univ., Charlottesville, VA, USA

fYear

1990

fDate

11-13 Mar 1990

Firstpage

420

Lastpage

425

Abstract

A motor drive circuit consisting of the bridge and the interface unit is described. The behavior of current flow in the nonredundant bridge is shown. Failure modes in this bridge are described. In order to provide fault tolerance, a number of new designs using passive and active redundancy are presented and analyzed. An analysis of these designs is done. An interface unit for driving the high-side nFET is developed using the principles of bootstrapping. Calculations of the capacitance and resistance in this circuit are described. Finally, some test results using SPICE and some experimental results on the circuit implemented are presented

Keywords

bridge circuits; circuit analysis computing; circuit reliability; electric drives; electric motors; electric vehicles; field effect transistor circuits; handicapped aids; redundancy; SPICE; active redundancy; bootstrapping; bridge; capacitance; current flow; failure modes; fault tolerant motor drives; high-side nFET; interface unit; nonredundant bridge; passive redundancy; powered wheelchairs; resistance; Bridge circuits; Circuit testing; FETs; Fault tolerance; MOSFETs; Microprocessors; Motor drives; SPICE; Thermal stresses; Wheelchairs;

fLanguage

English

Publisher

ieee

Conference_Titel

System Theory, 1990., Twenty-Second Southeastern Symposium on

Conference_Location

Cookeville, TN

ISSN

0094-2898

Print_ISBN

0-8186-2038-2

Type

conf

DOI

10.1109/SSST.1990.138182

Filename

138182