Speed sensitive field weakening control for traction motors

Details Speed sensitive field weakening control for traction motors Speed sensitive field weakening control for traction motors

1977-05-16

1981-04-07

Truhe, J. V.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318359, 318465, 318428, 318533, 318251, H02P 506

Patent

active

042609372

ABSTRACT:
Disclosed herein is a control for a direct current motor including a field weakening solenoid switch including a solenoid coil, which control includes an electronic switch connected in series with the coil for selectively connecting the coil to a source of direct current, and a device adapted for providing an electronic digital signal having a frequency proportional to motor speed. The control also includes a first electronic comparator adapted for receiving the digital signal and for providing an output cut-in signal for operating the electronic switch so as to connect the solenoid coil to the source of direct current to effect field weakening when the motor speed increases to a predetermined field weakening cut-in speed, and a second electronic comparator adapted for receiving the digital signal and for providing an output cut-out signal for operating the electronic switch to disconnect the coil from the source of direct current so as to prevent field weakening when the motor speed increases to a predetermined field weakening cut-out speed greater than the predetermined field weakening cut-in speed.

REFERENCES:
patent: 3274469 (1966-09-01), Tsuboi et al.
patent: 3360705 (1967-12-01), Morris
patent: 3382423 (1968-05-01), Clark
patent: 3384799 (1968-05-01), Thiele
patent: 3590352 (1971-06-01), Ries et al.
patent: 3820024 (1974-06-01), Wise et al.
patent: 3999108 (1976-12-01), Tanikoshi
patent: 4021681 (1977-05-01), Miesterfeld
patent: 4035704 (1977-07-01), York

Affiliated with

Also associated with

Rating

Speed sensitive field weakening control for traction motors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speed sensitive field weakening control for traction motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed sensitive field weakening control for traction motors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-291224