Rotary machine control

Details Rotary machine control Rotary machine control

2005-07-05

2005-07-05

Ip, Paul (Department: 2837)

Electricity: motive power systems

Plural diverse motor controls

Running-speed control

C318S723000, C318S729000, C318S805000, C318S807000

Reexamination Certificate

active

06914398

ABSTRACT:
The present invention discloses devices and methods for improved starting and stopping of rotary motors. A rotary electrical machine (3) is supplied with a voltage from a voltage supply (10). The magnitude of a phase current is measured. The measured current value (IM) and applied voltage (U) is compared with what is expected for a predetermined target slip (ST), by means of a relation between phase current, applied voltage and slip. The comparison gives a discrepancy value, which is used to create a regulation signal (ΔU) to the voltage supply (10). To start and stop the machine, the target slip is increased and decreased, respectively, in a predetermined manner. The means for regulation may be provided as a separate add-on unit to existing soft starter equipment.

REFERENCES:
patent: 4158163 (1979-06-01), Eriksen et al.
patent: 4384243 (1983-05-01), Muskovac
patent: 4400655 (1983-08-01), Curtiss et al.
patent: 4469997 (1984-09-01), Curtiss et al.
patent: 4565957 (1986-01-01), Gary et al.
patent: 4727305 (1988-02-01), Muskovac et al.
patent: 5008608 (1991-04-01), Unsworth et al.
patent: 5160878 (1992-11-01), Nagano
patent: 5212438 (1993-05-01), Miyazaki et al.
patent: 5334923 (1994-08-01), Lorenz et al.
patent: 5387855 (1995-02-01), Miyazaki et al.
patent: 5448150 (1995-09-01), Yamamoto et al.
patent: 5481173 (1996-01-01), Yamamoto
patent: 5532570 (1996-07-01), Tajima et al.
patent: 5565752 (1996-10-01), Jansen et al.
patent: 5585709 (1996-12-01), Jansen et al.
patent: 5828199 (1998-10-01), Tajima et al.
patent: 5841264 (1998-11-01), Caen
patent: 5965995 (1999-10-01), Seibel et al.
patent: 6229278 (2001-05-01), Garces et al.
patent: 0621680 (1994-04-01), None

Affiliated with

Also associated with

Rating

Rotary machine control does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3430935