Linear controller for electrochemical device and method

Details Linear controller for electrochemical device and method Linear controller for electrochemical device and method

1985-02-14

1986-12-23

Shoop, Jr., William M.

Electricity: motive power systems

Miscellaneous

318 46, 318599, 318811, 310136, 310229, H02P 700

Patent

active

046314636

ABSTRACT:
An apparatus for and method of generating and linearly controlling periodic bipolar drive signals to drive an electromechanical device, such as a DC motor. The apparatus comprises side-by-side coaxial primary and secondary cylindrical commutators electrically connected together by a pair of diametrically opposed motor-driven brushes riding on the exterior surface of the commutators, each commutator having matched half-cylinder conductive sections separated by insulation at the common joints. The rotational position of the secondary commutator is adjustable relative to the primary commutator by a stepper motor mechanically coupled to it. A DC source is connected across the primary commutator and the electromechanical load is connected across the secondary commutator. Power of adjustable polarity duty cycle is commutated from the DC source to the load by the pair of rotating brushes. The relative duty cycle of positive going portion relative to negative going portion of the bipolar signal is controlled by causing the stepper motor to adjust the rotational position of the secondary commutator relative to the primary commutator.

REFERENCES:
patent: 2986687 (1961-05-01), Mohan
patent: 3184627 (1965-05-01), Sears
patent: 3895273 (1975-07-01), Parker

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