Motor driver interface fault detection circuit with dual mode fa

Details Motor driver interface fault detection circuit with dual mode fa Motor driver interface fault detection circuit with dual mode fa

1990-11-16

1992-01-14

Shoop, Jr., William M.

Electricity: motive power systems

Limitation of motor load, current, torque or force

361 33, H02P 122

Patent

active

050814044

ABSTRACT:
A motor driver interface (MDI) circuit for an H-bridge electric motor drive apparatus is responsive to an enable signal to turn off all switching transistors in a not enabled mode and turn on the upper bridge transistors in an enabled mode and includes large resistors, sufficiently large to prevent motor activation therethrough, from the motor terminals to the power supply terminals to establish a bias voltage in the not enabled mode. Fault detection apparatus compares the voltages at the motor terminals with a first reference voltage apparatus in the not enabled mode and a second reference voltage apparatus in the enabled mode in response to the enable signal.

REFERENCES:
patent: 4901366 (1990-02-01), Rottger
patent: 4924158 (1990-05-01), Kelley et al.
patent: 4978898 (1990-12-01), Tsukahara et al.
patent: 4980838 (1990-12-01), Daggett et al.
patent: 4985666 (1991-01-01), Nakabayashi
patent: 4988931 (1991-01-01), Tsukahara et al.

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