Positioning apparatus using brushless motor

Details Positioning apparatus using brushless motor Positioning apparatus using brushless motor

2006-02-14

2006-02-14

Fletcher, Marlon T. (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

C318S560000, C318S567000, C318S626000

Reexamination Certificate

active

06998808

ABSTRACT:
A positioning apparatus having a brushless motor, a positioning mechanism, and a motor control circuit to rotate a rotor of the brushless motor by sequentially supplying a driving pulse to a plurality of fixed coils of the brushless motor. The motor control circuit includes a driving pulse generator, a present stage number detector to detect a present stage number of the rotor in accordance with an output signal from at least one magneto-sensitive device of the brushless motor, an initializer to move the movable member to at least a forward or a backward traveling limit within the movable range so as to set the rotor present stage number, and a speed reducer to reduce a rotating speed of the brushless motor by reducing power of the driving pulse when the rotor present stage number is equal to at least a forward traveling or a backward traveling stage number.

REFERENCES:
patent: 5521480 (1996-05-01), Yeo
patent: 5744923 (1998-04-01), Strauss et al.
patent: 5760558 (1998-06-01), Popat
patent: 5777446 (1998-07-01), Knab et al.
patent: 5872434 (1999-02-01), Hill
patent: 6346788 (2002-02-01), Nagai et al.
patent: 6639374 (2003-10-01), Shimoyama
patent: 6879119 (2005-04-01), Abe et al.
patent: 2004/0046521 (2004-03-01), Abe et al.
patent: 1 026 068 (2000-08-01), None
patent: WO 99/08374 (1999-02-01), None
European Search Report dated Feb. 20, 2004.

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