Speed control apparatus for elevator

Details Speed control apparatus for elevator Speed control apparatus for elevator

1985-05-13

1987-07-21

Shoop, Jr., William M.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 130

Patent

active

046811915

ABSTRACT:
The present invention relates to a speed control apparatus for an elevator wherein direct current is inverted into alternating current of variable voltage and variable frequency by a current-control type inverter and wherein an induction motor is driven by the inverted A.C. power so as to operate a cage, the speed control apparatus comprising control means to intensify a field of the induction motor beforehand at the time of start of the elevator and to reduce it down to a predetermined value after the start.

REFERENCES:
patent: 4422030 (1983-12-01), McAllise
patent: 4465961 (1984-08-01), Landino
patent: 4479565 (1984-10-01), Nomura
patent: 4516664 (1985-05-01), Anzai et al.

Affiliated with

Also associated with

Rating

Speed control apparatus for elevator 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 control apparatus for elevator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed control apparatus for elevator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-202001