Electricity: motive power systems – Battery-fed motor systems
Patent
1983-01-05
1985-04-30
Weldon, Ulysses
Electricity: motive power systems
Battery-fed motor systems
318345E, 361 90, H02P 100, H02H 324
Patent
active
045146659
ABSTRACT:
Apparatus (10) is provided for controlling current through a motor (12), including a circuit (14) for generating motor speed command data, a circuit (26) for generating a control signal in response to a maximum value of current through the motor (12), a programmable data processor (72) for generating pulse trains in response to the command data, and a controllable supplying circuit (18) for coupling and decoupling power to the motor (12) in response to the pulse trains and for decoupling power to the motor (12) in response to the control signal independent of the pulse trains. By decoupling power from the motor (12) independent of the control produced by the data processor (72), the current limit is achieved even if the data processor (72) malfunctions, contrary to prior apparatus.
REFERENCES:
patent: 3230440 (1966-01-01), Kleiner
patent: 3373341 (1968-03-01), Wattson
patent: 3426265 (1969-02-01), Till
patent: 3551773 (1970-12-01), Dannettell et al.
patent: 3596154 (1971-07-01), Gurwicz et al.
patent: 3624474 (1971-11-01), Nolf
patent: 3842317 (1974-10-01), Mattes et al.
patent: 3868554 (1975-02-01), Konrad
patent: 4090116 (1978-05-01), Lippitt
patent: 4378517 (1983-03-01), Morton et al.
Applications filed simultaneously herewith by Grant C. Melocik et al., for Short Circuit Protection Apparatus; Diagnostic Display Apparatus; Anti-Rollback Control; Dual-Motor Control Apparatus; Coil and Coil Driver Control Apparatus; Motor Speed Control Apparatus; and Plugging Electrical Braking Control Circuit.
Melocik Grant C.
Pickering William
Noe Stephen L.
Towmotor Corporation
Weldon Ulysses
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