Electric drive system and method

Electricity: motive power systems – Series motors – Field circuit control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

318139, 318527, 388905, 388801, 388806, H02K 2308

Patent

active

061277916

ABSTRACT:
An integrated transmission is effectively achieved within a series-excited motor by varying the number of winding turns in the field coil in relation to the speed-torque demand on the motor. At low motor speed, all of the field winding is engaged to produce the maximum available electromagnetic field, thereby increasing the motor's available torque and efficiency. When there is a high torque demand at high speed, only a portion of the field winding is engaged so that a reduced electromagnetic field is produced, thereby allowing a higher current in the motor, thereby allowing a higher torque to be produced. Thus the series motor with integrated transmission will have the same speed-torque characteristics as a system with a series motor and a conventional transmission. The integrated transmission can be implemented with relatively inexpensive relays and, if desired, by adding additional winding turns in the series field. The advantage of the integrated transmission is that it is less costly than and eliminates the weight of a separate transmission, which are important in applications like electric vehicles.

REFERENCES:
patent: 468128 (1892-02-01), Blackwell
patent: 1063608 (1913-06-01), Shaw et al.
patent: 3283227 (1966-11-01), Ulinski
patent: 3348111 (1967-10-01), Woehler
patent: 3656038 (1972-04-01), Ries et al.
patent: 3678357 (1972-07-01), Swanke et al.
patent: 4471277 (1984-09-01), Franz, Jr.
patent: 4935478 (1990-06-01), Houst
patent: 4935678 (1990-06-01), Houst
patent: 5164642 (1992-11-01), Ashiya

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

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

Rate now

     

Profile ID: LFUS-PAI-O-198885

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