Title:
MOTOR START-UP CIRCUIT
Document Type and Number:
Japanese Patent JP2012165520
Kind Code:
A
Abstract:
To start up a motor without confirming generation of PWM and to quietly and surely perform the start-up.
A motor start-up circuit includes a counter 3 for counting the number of Hall pulses to be externally inputted after being reset by power supply. As motor drive signals, PWM signals of a duty 100% are outputted until the counter 3 counts a prescribed number of the Hall pulses, and controlled PWM signals are outputted when the counter 3 counts the prescribed number of the Hall pulses.
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Inventors:
FUJITA SHINYA
Application Number:
JP2011022743A
Publication Date:
August 30, 2012
Filing Date:
February 04, 2011
Export Citation:
Assignee:
NEW JAPAN RADIO CO LTD
International Classes:
H02P1/16
Domestic Patent References:
| JP2009159810A | 2009-07-16 | |||
| JP2010154697A | 2010-07-08 |
Attorney, Agent or Firm:
Tsuneaki Nagao