Pre-step timer circuit for DC motor control

Details Pre-step timer circuit for DC motor control Pre-step timer circuit for DC motor control

1979-05-21

1981-05-12

Weldon, Ulysses

Electricity: motive power systems

Periodic, repetitious or successive operations control of...

318484, 318446, 318444, 318490, H02P 104

Patent

active

042674930

ABSTRACT:
A pre-step timer circuit for pre-advancing the next timer period (control step) in a DC motor controller, such as in a crane-hoist controller. A sensing resistor module is connected from the line side of a contactor coil of a preceding control step to the input of a timer module in series with the accelerating contactor coil in the next control step. This resistor module sensing the previous coil voltage provides a feed-forward path for the sensed voltage signal to pre-time the next timer module. So, if a master switch is left in the previous control step long enough for the next timer module to time out, then the next control step is actuated immediately when the master switch is advanced thereto.

REFERENCES:
patent: Re27919 (1974-02-01), Pucher
patent: 3700914 (1972-10-01), Granieri et al.
patent: 3943421 (1976-03-01), Shibata et al.

Affiliated with

Also associated with

Rating

Pre-step timer circuit for DC motor 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 Pre-step timer circuit for DC motor control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-step timer circuit for DC motor control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2049179