Circuit for sensing motor load current

Details Circuit for sensing motor load current Circuit for sensing motor load current

1997-11-04

1999-05-04

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

H02P 528

Patent

active

059007141

ABSTRACT:
A current sensing circuit including a shunt resistor coupled, at one end, to the low-side transistor of a half bridge circuit and, at its other end, to a load. The voltage sensed across the shunt resistor is proportional to the current delivered to the load. A level shifting circuit is provided to transpose the sensed voltage to a low voltage signal which can be fed back to control commutation of the transistors in the half bridge circuit.

REFERENCES:
patent: 4641075 (1987-02-01), Asano et al.
patent: 5017855 (1991-05-01), Byers et al.
patent: 5072354 (1991-12-01), Katto et al.
patent: 5079494 (1992-01-01), Reichard
patent: 5198733 (1993-03-01), Wright
patent: 5204594 (1993-04-01), Carobolante
patent: 5349351 (1994-09-01), Obara et al.

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