Direct current motor drive circuit and fan motor including...

Details Direct current motor drive circuit and fan motor including... Direct current motor drive circuit and fan motor including...

2006-02-07

2006-02-07

Duda, Rina (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C318S434000, C388S907000, C388S907200, C388S921000

Reexamination Certificate

active

06995531

ABSTRACT:
A direct current motor drive circuit comprises: a hall element; an H-bridge drive circuit which receives an input of a sinusoidal signal outputted from the hall element and outputs rectangular wave signals corresponding to the sinusoidal signal; a dead time circuit which carries out rectangular wave signal processing for the rectangular signals; and an H-bridge circuit which receives the output signals of the dead time circuit, in that the H-bridge circuit includes a first series circuit in which a second switching element connected to a positive power supply voltage and a first FET connected to the ground are connected in series via a first node, a second series circuit in which a first switching element connected to the positive power supply voltage and a second FET connected to the ground are connected in series via a second node, and a coil of the direct current motor connected to the first node and the second node.

REFERENCES:
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patent: 5977737 (1999-11-01), Labriola, II
patent: 5978547 (1999-11-01), Reynolds et al.
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patent: 9331692 (1997-12-01), None
patent: 2004040918 (2004-02-01), None
patent: 2004260965 (2004-09-01), None

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