Motor drive apparatus and motor drive method

Details Motor drive apparatus and motor drive method Motor drive apparatus and motor drive method

2005-09-06

2009-12-01

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Constant motor current, load and/or torque control

C318S811000

Reexamination Certificate

active

07626350

ABSTRACT:
A motor drive apparatus and motor drive method reduce vibration and acoustic noise by not requiring a non-activation period for rotor position detection, and enable stable, high efficiency motor drive. A control voltage generator generates a control voltage based on the frequency of the speed signal FG output from a speed detection unit, and the amplitude of the control voltage is controlled based on a torque control signal EC. The phase difference generator detects the phase difference between the control voltage and the zero cross signal of the motor current detected from the motor terminal voltages. A control voltage generator controls the phase of the control voltage so that the phase difference goes to zero, thus accomplishing sensor-less motor drive.

REFERENCES:
patent: 5729113 (1998-03-01), Jansen et al.
patent: 6400107 (2002-06-01), Nakatani et al.
patent: 6512343 (2003-01-01), Yasohara
patent: 7151354 (2006-12-01), Yoshinaga et al.
patent: 2004/0104704 (2004-06-01), Hirono
patent: 1505255 (2004-06-01), None
patent: 7-245982 (1995-09-01), None
patent: 3424307 (2003-05-01), None
patent: 2004-187407 (2004-07-01), None

Affiliated with

Also associated with

Rating

Motor drive apparatus and motor drive method 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 drive apparatus and motor drive method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor drive apparatus and motor drive method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4056276