Stepping motor drive device and method

Electricity: motive power systems – Braking – Automatic and/or with time-delay means

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C318S599000, C318S801000, C318S685000, C318S696000

Reexamination Certificate

active

07023157

ABSTRACT:
The reference signal generation unit110aintegrates, in the integration circuit3, a staircase signal generated by the staircase generation unit2, and thereby generates a reference signal VCTA whose signal level changes continuously over time, and which represents a limit value for the supply current. According to the control of the PWM control unit120a, the bridge rectification circuit130amaintains the coil supply current at the limit value, using a current chopper method. Additionally, when the current supply is stopped, the bridge rectification circuit130aperforms synchronous rectification, where the transistors10and12are brought into conduction, and a regenerative current is circulated in a closed circuit formed with the coil19a. When the reference signal VCTA decreases relatively fast, the synchronous rectification prohibition unit115aprohibits one of the transistors10and12from being brought into conduction when the current supply is stopped.

REFERENCES:
patent: 2004/0000884 (2004-01-01), Inao et al.
patent: 2004/0080333 (2004-04-01), Klein
patent: 6-343295 (1994-12-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFUS-PAI-O-3594490

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.