Title:
PWM SPEED REGULATING APPARATUS FOR A DC ELEVATOR
Document Type and Number:
WIPO Patent Application WO/1996/021967
Kind Code:
A1
Abstract:
A PWM speed regulating apparatus for a DC elevator comprises a rectifier and filter (1), voltage suppressor (2), chopper voltage regulator (3), system controller (4) and a driving protector (5). The speed of DC motor is regulated by a pulse width modulating mode so that the current of the motor is maintained continuously and the ripple of current and torque is lower, and which ensures a good riding quality and a high floor arrival accuracy.
Inventors:
SUN WENLIN (CN)
Application Number:
PCT/CN1996/000003
Publication Date:
July 18, 1996
Filing Date:
January 12, 1996
Export Citation:
Assignee:
SUN WENLIN (CN)
International Classes:
B66B1/30; H02P7/281; H02P7/29; H02P7/295; (IPC1-7): H02P5/06
Foreign References:
| EP0409185A2 | 1991-01-23 | |||
| US4611153A | 1986-09-09 | |||
| US4520296A | 1985-05-28 |
Other References:
See also references of EP 0803969A4
Download PDF:
Previous Patent: UNINTERRUPTIBLE POWER SUPPLY
Next Patent: SYSTEM AND METHOD FOR DIGITAL FM DEMODULATION
Next Patent: SYSTEM AND METHOD FOR DIGITAL FM DEMODULATION