Tacho generator

Details Tacho generator Tacho generator

1990-12-18

1993-01-05

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310688, 310156, 310179, 310184, 310268, 310DIG6, H02K 1742

Patent

active

051773899

ABSTRACT:
A servo controlled motor has an annular coil arrangement with meander-shaped windings and an annular arrangement of magnetic pole pairs, positioned for concentric relative rotation. A first coil is formed by a first number of the windings aligned at a first angle and with consistent pitch relative to a diameter line. A first number of pole pairs are aligned at the first angle and correspond in number and pitch to the first number of windings. A second coil is formed by a second number of windings. The second number of windings is aligned at a second angle relative to the diameter line. A second number of the pole pairs are aligned at the second angle and correspond in number and pitch to the second number of windings. Voltages are induced in the second coil by the second, but not by the first, number of pole pairs. Alternatively, the first number of windings define a grid of winding positions. A second coil is formed by a second number of windings aligned at the first angle. Some of the second number of windings are disposed in winding positions and others are offset from winding positions. A second number of the pole pairs aligned substantially at the first angle correspond in number and relative position to the second number of windings. Voltages induced in the second number of windings by the first number of pole pairs substantially cancel out, but voltages induced by the second number of pole pairs add together.

REFERENCES:
patent: 4410853 (1983-10-01), Ikoma
patent: 4488076 (1984-12-01), MaCleod
patent: 4695795 (1985-09-01), Nakamazio et al.
patent: 4751415 (1988-06-01), Kitamori
patent: 4755701 (1988-07-01), Shikama
patent: 5045740 (1991-09-01), Hishinuma

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