Title:
緊急制動システム及び緊急制動方法
Document Type and Number:
Japanese Patent JP7260273
Kind Code:
B2
Abstract:
A system includes a converter operatively connected to an alternating current (AC) power source and a direct current (DC) bus, an inverter operatively connected to a motor and the DC bus, and a controller. The converter includes a first plurality of switching devices in selective communication with each phase of the AC power source and the DC bus. The inverter includes a second plurality of switching devices in selective communication with each phase of the motor and the DC bus. The controller is operable to command dropping of a brake through a passive delay circuit responsive to an emergency stop condition for a load driven by the motor and reduce a voltage on the DC bus by dropping at least one phase of the AC power source and/or using a dynamic braking resistor prior to the brake physically dropping.
Inventors:
Prasanna Nagarajan
Shashank Krishnamurthy
Conda Reddy Ceva
Shashank Krishnamurthy
Conda Reddy Ceva
Application Number:
JP2018179608A
Publication Date:
April 18, 2023
Filing Date:
September 26, 2018
Export Citation:
Assignee:
Otis Elevator Company
International Classes:
H02M7/48; B66B1/32; H02P3/18; H02P3/22
Domestic Patent References:
| JP697875B2 | ||||
| JP223080A | ||||
| JP2014143920A |
Foreign References:
| US20120118675 |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Kiyoshi Tomioka
Kiyoshi Tomioka