Motor driving circuit

Details Motor driving circuit Motor driving circuit

2007-01-22

2011-12-27

Benson, Walter (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S599000, C318S811000, C388S804000, C388S829000

Reexamination Certificate

active

08084973

ABSTRACT:
A motor driving circuit generates pulse driving signals, and controls the ON/OFF state of a switching circuit connected to a coil of a motor which is to be driven, thereby controlling the conduction period of the motor. A driving signal generating circuit generates the driving signals such that they are pulse modulated according to the torque target value for the motor, and outputs the driving signals to the switching circuit. A current detection circuit detects the current flowing through the coil of the motor. A current limiting circuit controls the logical values of the driving signals generated by the driving signal generating circuit such that the current detected by the current detection circuit does not exceed a predetermined current upper limit. The current limiting circuit increases the current upper limit according to the time elapsed in the starting operation of the motor. After the starting operation of the motor, the current upper limit is set to a predetermined fixed value.

REFERENCES:
patent: 5847523 (1998-12-01), Rappenecker et al.
patent: 5883489 (1999-03-01), Konrad
patent: 6016965 (2000-01-01), Yoshimura et al.
patent: 6967459 (2005-11-01), Hahn et al.
patent: 7030584 (2006-04-01), Alberkrack
patent: 7064510 (2006-06-01), Brannen et al.
patent: 7148642 (2006-12-01), Brannen et al.
patent: 7233121 (2007-06-01), Wu et al.
patent: 7276867 (2007-10-01), Alberkrack et al.
patent: 7365508 (2008-04-01), Iribe et al.
patent: 7747146 (2010-06-01), Milano et al.
patent: 2004/0081438 (2004-04-01), Hahn et al.
patent: 2004/0155616 (2004-08-01), Iribe et al.
patent: 62-081991 (1987-04-01), None
patent: 04-197096 (1992-07-01), None
patent: 07-095792 (1995-04-01), None
patent: 2001-045790 (2001-02-01), None
patent: 2004-201485 (2004-07-01), None
patent: 2004-364408 (2004-12-01), None
patent: 2005-245175 (2005-09-01), None
International Search Report for International Application No. PCT/JP2007/000024; Date of mailing Apr. 24, 2007; with English translation.
International Preliminary Report on Patentability for International Application No. PCT/JP2007/000024; Date of issuance Jul. 29, 2008; with English translation.
Chinese Office Action for Application No. 20070000203.9 issued Mar. 11, 2010 with English translation.
Japanese Office Action,Notification of Reason(s) for Refusal for Japanese Patent Application No. 2006-014448 mailing date of Aug. 2, 2011 with English Translation.

Affiliated with

Also associated with

Rating

Motor driving circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motor driving circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor driving circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4314976