Electricity: motive power systems – Positional servo systems – Pulse-width modulated power input to motor
Patent
1995-06-06
1997-05-06
Ip, Paul
Electricity: motive power systems
Positional servo systems
Pulse-width modulated power input to motor
318254, 318138, H02P 614, H02P 505
Patent
active
056274416
ABSTRACT:
This invention relates to a motor drive control apparatus for using, for example, a spindle motor of a magnetic disk system. The inventioned apparatus achieves a motor drive control apparatus of high efficiencies with eliminating dead loss of power consumption and avoiding switching noises.
The inventioned apparatus for controlling revolution drive of a motor comprising a motor including a rotor and a plurality of drive coils for defining number of excitation phases for making the rotor one cycle revolution and a current supply means for supplying a plurality of drive currents in a successive order to the plurality coils from a voltage source directly.
The inventioned apparatus further includes first detecting means for detecting a rotational position of the rotor in each of the excitation phases, second detecting means for detecting number of revolution of the rotor by using a the detected rotor position signal from the first detecting means and a time setting means for determining a current supply time and a start timing for an excitation for the respective coils in each excitation phase in accordance with a detected difference between the detected number of revolution of the rotor and a predetermined target number of revolution of the rotor.
The drive pulse forming circuit generates a drive pulse signal to the current supply means for supplying a plurality of drive currents to the plurality coils in accordance with the determined current supply time and a start timing for each excitation phase.
REFERENCES:
patent: 4641066 (1987-02-01), Nagata et al.
patent: 5036264 (1991-07-01), Ueki
patent: 5317243 (1994-05-01), Cameron
patent: 5481167 (1996-01-01), Rohrbaugh et al.
patent: 5486743 (1996-01-01), Nagai
patent: 5517095 (1996-05-01), Carobolante et al.
Kaida Katsuhiko
Sakurai Tetsuji
Ip Paul
Kabushiki Kaisha Toshiba
LandOfFree
Apparatus for controlling motor drive and method for controlling does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for controlling motor drive and method for controlling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for controlling motor drive and method for controlling will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2134812