Variable air-gap type driving device

Details Variable air-gap type driving device Variable air-gap type driving device

1993-11-15

1996-08-13

Martin, David S.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310 37, 310 82, H01L 4104

Patent

active

055459439

ABSTRACT:
The variable air-gap type driving detector of the present invention for obtaining low speed and high torque outputs required to drive, for example, joints of industrial robots is provided with an elastic supporting means 22, whose one end is supported on a base stand 21 , for supporting a rotor 5 so as to restrain the rotor 5's autorotation; and an eccentric supporting meals, whose rotation shaft 23b is supported on the base stand 21 in a freely rotatable state, and an outside of whose eccentric shaft 23a is supported inside the motor 5, and further whose rotation shaft 23b rotates with the revolution of the rotor 5; and the driving device of the invention becomes simple in structure and small in size by being composed of using no cranks or only a crank.
Also, the driving device of the invention is provided with a first gear supported on a base stand in a freely rotatable state; and a second gear, linked with a rotor, for rotating the first gear by revolving inside the first gear with the revolution of the rotor; therefore the revolution movements of the rotor become capable of being taken out from the first gear as rotation movements with only an eccentric supporting means.
Further, the driving device of the invention is provided with a waveform generator for generating waveform signals, indicating voltage values or current values to be imposed on each coil of an armature, on command signals corresponding to rotation angles of a rotor; and a controlling power supply for giving voltages or current corresponding to waveform signals generated by the waveform generator to each coil; therefore smooth rotation movements based on rotation angles of the rotor can be obtained.

REFERENCES:
patent: 4164722 (1979-08-01), Garvey
patent: 4398167 (1983-08-01), Dickie et al.
patent: 4543718 (1985-10-01), Duescher
patent: 4598594 (1986-07-01), Dainley
patent: 4626718 (1986-12-01), Moriyama
patent: 4690010 (1987-09-01), Matsumoto et al.
IEEE Transactions on Power Apparatus & Systems, Jan./Feb. 1980 Experimental & Theoretical Study of Hypocycloidal Motors . . . .

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