Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Patent
1988-03-02
1989-07-04
Dobeck, Benjamin
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Field control, or field and armature control, by analog...
318493, 388805, 388818, H02P 714
Patent
active
048454133
ABSTRACT:
A device for controlling the field current of a DC motor supplied from an AC network and which is operated beyond the normal speed of the DC motor in the higher speed range obtainable by weakening of the field of the DC motor, there being provided for the apportioning of the field current of the DC motor a phase angle control circuit which is operated depending on a control variable obtained from the respective measured speed of the DC motor by a function-forming device as a function of the speed, the function-forming device comprising a function memory which contains values of the control variable correlated to individual speed values stored in a matrix in tabulated form, the correlation of these values individually corresponding to the DC motor being established when the DC motor starts up for the first time, and where a constant dependence of the control variable on the speed is established either by a polygonal line obtained by linear interpolation from the value pairs stored in tabulated form or by a curve optimally approximated to these value pairs.
REFERENCES:
patent: 3358204 (1967-12-01), Bradley
patent: 3749204 (1973-07-01), Caputo
patent: 3950684 (1976-04-01), Peterson
patent: 4035704 (1977-07-01), York
patent: 4037144 (1977-07-01), Ohmae et al.
patent: 4079301 (1978-03-01), Johnson
patent: 4099111 (1978-07-01), Inaba et al.
patent: 4171505 (1979-10-01), Shima et al.
patent: 4366420 (1982-12-01), Omae et al.
patent: 4378517 (1983-03-01), Morton et al.
patent: 4385266 (1983-05-01), Sloan
patent: 4484117 (1984-11-01), Bose
patent: 4549122 (1985-10-01), Berkopec et al.
patent: 4739230 (1988-04-01), Sonobe et al.
patent: 4751439 (1988-06-01), Buchwald et al.
Vol. 8-9 Siemens-Energietechnik 3, 1981; pp. 269-272, Bachman & Engel.
Vol. 4 Siemens-Energietechnik 1, 1979, H. Elger.
Hackl Franz
Spitaler Wolfgang
Wohrer Franz
Dobeck Benjamin
Siemens Aktiengesellschaft
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