DC torque motor, and drive control apparatus and throttle valve

Details DC torque motor, and drive control apparatus and throttle valve DC torque motor, and drive control apparatus and throttle valve

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

REFERENCES:
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patent: 4510403 (1985-04-01), Vanderlaan et al.
patent: 4600864 (1986-07-01), Sato
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patent: 4845424 (1989-07-01), Gamble
patent: 5038064 (1991-08-01), Fiorenza
patent: 5243241 (1993-09-01), Wang
patent: 5334893 (1994-08-01), Oudet et al.
patent: 5742106 (1998-04-01), Muraji
patent: 5753985 (1998-05-01), Redlich
patent: 5927249 (1999-07-01), Ackermann et al.

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