Electricity: motive power systems – Reciprocating or oscillating motor – Plural – diverse or diversely controlled motor windings
Patent
1983-05-24
1985-01-29
Duggan, Donovan F.
Electricity: motive power systems
Reciprocating or oscillating motor
Plural, diverse or diversely controlled motor windings
318128, 318132, 323315, H02K 3300
Patent
active
044968850
ABSTRACT:
To obtain high accuracy of the control current in spite of tolerances of operation of the positioned element, a current mirror circuit (18) is provided having two current paths (17, 23). A low resistance resistor (11) is connected in series with the positioned element and the first current path (17) of the current mirror circuit. A command element (22) is connected in the second current path (23) of the current mirror circuit and connected to a command value--actual value comparator (24, 26). Thus, high accuracy of operation and control current is obtained in spite of wide tolerances of the positioning element. Losses in the system are minimized by using pulse width--modulated control thereof.
REFERENCES:
patent: 3568017 (1971-03-01), Schaad
patent: 3649893 (1972-03-01), Lajoie
patent: 3763745 (1973-10-01), Andersen
patent: 4303869 (1981-12-01), Baran
patent: 4338646 (1982-07-01), Davis et al.
patent: 4350904 (1982-09-01), Cordell
patent: 4435678 (1984-03-01), Joseph et al.
Duggan Donovan F.
Robert & Bosch GmbH
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