Three section brushless motor

Details Three section brushless motor Three section brushless motor

1987-05-12

1988-10-04

Salce, Patrick R.

Communications: electrical

Digital comparator systems

310156, H02K 1600

Patent

active

047758120

ABSTRACT:
A brushless motor includes a first motor section provided with a switching element to change over energization of an exciting coil wound around a stator pole based on a signal from a rotor position detector for detecting rotational position of a rotor magnet. A second motor section has a rotor magnet and a stator pole including the same number of magnet poles as the first motor section with the stator pole being normally maintained at predetermined polarities. A third motor section has a rotor magnet and a stator pole with two times the number of magnet poles of the second motor section, with the stator pole being normally maintained at predetermined polarities. The first, second and third motor sections are arranged on the same shaft, with the third motor section being so disposed as to generate torque in a regular direction at the maximum, with respect to a torque transformation point, in the direction of a generated torque of the second motor.

REFERENCES:
patent: 4009406 (1977-02-01), Inariba
patent: 4620139 (1986-10-01), Egami et al.
patent: 4639648 (1987-01-01), Sakamoto
2-Phase Transistor Motor by Teruaki Kitamori, Shin Tanaka and Yoshio Yamada, from National Technical Report, vol. 26, No. 5, (Oct. 1980), pp. 794 to 800 (Japanese with English translation).

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