Short circuit protection

Details Short circuit protection Short circuit protection

1990-03-16

1993-03-09

Ip, Paul

Electricity: motive power systems

Motor load, armature current or force control during...

318294, 318635, 361 98, H02K 1734

Patent

active

051929015

ABSTRACT:
In the transistor power output stages disclosed herein, short-circuit protection is provided with respect to output terminals through which a reversible motor or other load is to be energized. An output stage connected between the load and one of the supply leads provides current gain for energizing the load at a current level which is a function of the level of drive current provided to the output stage. Drive current is provided only at a first level independently of the voltage at the output terminal and a sensing means provides drive current at an increased level when the voltage at the output terminal is in a normal range, e.g. close to the voltage at the respective supply lead.

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