Electrical generator or motor structure – Dynamoelectric – Oscillating
Patent
1999-05-10
2000-11-28
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Oscillating
310254, 318119, H02K 3300
Patent
active
06153952&
ABSTRACT:
A small-sized, light-weight DC torque motor with good response characteristics. The motor is a moving magnet type DC torque motor rockable in a rocking angle of 0=45 to 135 degrees. The motor includes a stator with a coil wound around a portion thereof, the stator having a generally U-shape and having end portions facing each other and having magnetic pole sections arranged thereon; and a needle surrounded by the end portions of the stator, being rotatably supported, and including permanent magnets attached thereto; so that the needle can be rocked within a predetermined working angle range; a portion of the stator has a section area A smaller than that of the magnetic pole sections, the stator is formed of a material having a saturation magnetic flux density B, and the section area A satisfies the condition that the product of A and B is smaller than the sum of (i) a magnetic flux quantity which occurs when an electric current flows in the coil and (ii) a maximum permanent magnetic flux quantity generated by the permanent magnets within the working angle range
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Asami Katsuhiro
Ito Yoshiki
Aisan Kogyo Kabushiki Kaisha
Ramirez Nestor
Waks Joseph
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