Method and apparatus for driving a DC motor

Details Method and apparatus for driving a DC motor Method and apparatus for driving a DC motor

1989-05-11

1991-04-23

Roskoski, Bernard

Electricity: motive power systems

Switched reluctance motor commutation control

318696, 318138, H02P 602

Patent

active

050102826

ABSTRACT:
A high efficiency remote current sensing motor drive circuit is disclosed, wherein the use of a sense resistor to sense motor current is eliminated to improve the overall efficiency of the motor drive circuit. The disclosed motor drive circuit is based on the principle that the drain-to-source voltage of a power FET in a motor phase driver can be detected and used to generate a feedback current that is proportional to the detected drain-to-source voltage and inversely proportional to a drain-to-source resistance of a reference FET that is much smaller than the power FET.

REFERENCES:
patent: 4370065 (1983-01-01), Kawamura et al.
patent: 4522507 (1985-06-01), Kawamura et al.
patent: 4595865 (1988-10-01), Jahns
patent: 4599005 (1986-07-01), Kawamura et al.
patent: 4715725 (1987-12-01), Kawamura et al.
patent: 4777579 (1986-06-01), Jahns et al.

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