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US 7,397,155 B2Granted
Motor, drive unit and actuating device
AssigneeTomy Company, Ltd.
InventorsYoshio Suimon, Yoshinobu Kaneko
Life of this patent
Estimating the term…
Abstract
A motor having: a rotor having a permanent magnet; and a stator having an air core coil, wherein a rotating magnetic field is formed between the permanent magnet and the air core coil by performing an energization control of the air core coil to rotate the rotor, a rotor shaft is made of one of a magnetic material and a nonmagnetic material, and a part or a portion to form the rotor excluding the permanent magnet and the rotor shaft is made of a nonmagnetic material.
Claims13
A drive unit comprising:
- a motor including one rotor having a plurality of permanent magnets, and a stator having an air core coil,
- wherein a rotating magnetic field is formed between the permanent magnets and the air core coil by performing an energization control of the air core coil to rotate the rotor on a rotor shaft;
- a power transmission mechanism to transmit a rotational force of the motor to a member, and
- a casing to receive the motor and the power transmission mechanism, and
- a solar battery as a power source for the motor,
- wherein the permanent magnets are arranged at equal intervals along the circumferential direction of the rotor shaft,
- wherein the air core coil is arranged with a central axis thereof being parallel to the rotor shaft, and a winding of the air core coil is spaced from and opposed to an end face of each of the permanent magnets, and
- wherein a part of the rotor, excluding the permanent magnets and the rotor shaft, and the power transmission mechanism and the casing are made of a nonmagnetic material.
5 more elements
Dependencies are inferred from the claim text.