Coupled RFI choke as stall detection means for brush type DC...

Details Coupled RFI choke as stall detection means for brush type DC... Coupled RFI choke as stall detection means for brush type DC...

2005-11-01

2005-11-01

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Alternating current commutating motors

Universal or a.c.-d.c. motors

C318S434000, C318S461000, C388S903000

Reexamination Certificate

active

06960895

ABSTRACT:
A brush type DC motor10having an armature15and positive and negative power leads is provided. The motor includes an RFI choke12as a transformer in series with at least one of the positive and negative power leads to amplify current such that rotation of the armature15can be detected based on monitoring a voltage relating to the amplified current. Conditioning circuitry14is constructed and arranged to condition the voltage for detecting rotation of the armature.

REFERENCES:
patent: 3560818 (1971-02-01), Amato
patent: 3727133 (1973-04-01), Marvin et al.
patent: 3930191 (1975-12-01), Loderer
patent: 4270164 (1981-05-01), Wyman et al.
patent: 4514670 (1985-04-01), Fassel et al.
patent: 5132602 (1992-07-01), Jorgensen et al.
patent: 5744921 (1998-04-01), Makaran
patent: 0 336 530 (1989-10-01), None
patent: 1 286 236 (2003-02-01), None
“The Radio Armateur's Handbook”, American Radio Relay League, Newington, CONN., 1974, p. 115 shows filter circuits for dc power sources.

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