Polyphase motor, particularly for driving an indicator needle
AssigneeSonceboz SA
InventorDaniel Prudham
Life of this patent
Estimating the term…
Abstract
A polyphase motor formed by a stationary member excited by electric coils and by a magnetized rotor. The rotor has N pairs of poles magnetized radially in alternating directions, N being equal to 4 or 5. The stationary member has at least two W-shaped circuits each including an electric coil surrounding the central strut. The W-shaped circuits are arranged so that when one of the central struts is opposite a magnetic transition, the other central strut is roughly opposite a magnetic pole. Pole shoes of the central struts of the two W-shaped circuits can also be spaced at 120.degree. angles.
Claims19
A polyphase motor comprising:
- a stationary member excited by electric coils and by a magnetized rotor, the magnetized rotor having N pairs of poles magnetized radially in alternating directions separated by magnetic transitions, N being equal to 4 or 5;
- and
- wherein the stationary member includes at least first and second W-shaped circuits, said at least first and second W-shaped circuits including respective first and second central struts with respective first and second pole shoes, each of said at least first and second W-shaped circuits being arranged so that when the first central strut is opposite a magnetic transition of the magnetized rotor, the second central strut is roughly opposite a magnetic pole, and the first and second pole shoes of the first and second central struts of the at least first and second W-shaped circuits being angularly displaced by an angle roughly equal to 120.degree..
A polyphase motor comprising:
- a stationary member excited by electric coils and by a magnetized rotor, the magnetized rotor having N pairs of poles magnetized radially in alternating directions separated by magnetic transitions, N being equal to 4 or 5;
- and
- wherein the stationary member includes at least first and second W-shaped circuits, said at least first and second W-shaped circuits including respective first and second central struts with respective first and second pole shoes, each of said at least first and second W-shaped circuits being arranged so that when the first central strut is opposite a magnetic transition of the magnetized rotor, the second central strut is roughly opposite a magnetic pole.
A polyphase motor comprising:
- a stationary means excited by electric coil means and by a magnetized rotor means, the magnetized rotor means having N pairs of poles magnetized radially in alternating directions separated by magnetic transitions, N being equal to 4 or 5;
- and
- wherein the stationary means includes at least first and second W-shaped circuit means, said at least first and second W-shaped circuit means including respective first and second central strut means with respective first and second pole shoe means, each of said at least first and second W-shaped circuit means being arranged so that when the first central strut means is opposite a magnetic transition of the magnetized rotor means, the second central strut means is roughly opposite a magnetic pole, and the first and second pole shoe means of the first and second central strut means of the at least first and second W-shaped circuit means being angularly displaced by an angle roughly equal to 120.degree..
Dependencies are inferred from the claim text.