Mechanical-to-electrical energy converter

Details Mechanical-to-electrical energy converter Mechanical-to-electrical energy converter

1987-05-28

1989-01-17

Salce, Patrick R.

Electricity: single generator systems

Automatic control of generator or driving means

Speed or frequency of generator

322 8, 320 61, 290 1E, H02D 904

Patent

active

047990031

ABSTRACT:
The converter described comprises a generator (2) having a rotor (3) driven by a spring (1) via a gear-train (4), and means (11) for electrically braking the rotor (3). In one form of embodiment of the converter, the mean rotational speed of the rotor (3) is adjusted to a predetermined set speed by a control circuit (12) which periodically cuts out the braking means (11) in response to a reference signal having a period equal to the ratio between a predetermined rotational angle of the rotor (3) and the set speed. The control circuit (12) cuts the braking means (11) in again after a length of time which varies in response to a signal generated by a circuit (26, 27) for comparing the real angular position of the rotor (3) at the beginning of each period of the refernce signal with the angular position it should be in when running at the set speed.
The converter may for instance be used in a timepiece having hands (9) that are also driven by the spring (1).

REFERENCES:
patent: 3914706 (1975-10-01), Hammer et al.
patent: 3937001 (1976-02-01), Berney
patent: 4169992 (1979-08-01), Nash
patent: 4371821 (1983-02-01), Laesser et al.
Swiss Search Report for CH 1247/86, dated Dec. 15, 1986.
European Search Report for EP No. 87 10 3046, dated Jul. 3, 1987.

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