ELEVATOR SYSTEM - HITACHI LTD

Title:

ELEVATOR SYSTEM

Document Type and Number:

WIPO Patent Application WO/2018/008244

Kind Code:

A1

Abstract:

The present invention is provided with: a first control circuit which controls opening and closing of a power supply switch (3) that opens and closes a first power supply path; a second control circuit that controls opening and closing of a first contact (11) that opens and closes a second power supply path connecting a power supply and a brake circuit (14, 15); a third control circuit which controls opening and closing of a second contact (12) that is connected in parallel with the first contact and opens and closes the second power supply path; and a controller (5) which controls the operation of a power converter (4) and manages the first control circuit, the second control circuit, and the third control circuit as elements to be controlled, wherein, in a brake releasing operation, the controller (5) commands the first control circuit to open the power supply switch to shut off power supply to the power converter, commands the second control circuit to open the first contact to shut off power supply to the brake circuit, and then commands the third control circuit to close the second contact to supply power from the power supply to the brake circuit by bypassing the first contact.

More Like This:

JP3195161	HOME ELEVATOR
WO/2019/030888	BREAK DETECTION DEVICE

Inventors:

INOUE SHINSUKE (JP)
OHNUMA NAOTO (JP)
TERUNUMA TOMOAKI (JP)
TAKAYAMA NAOKI (JP)

Application Number:

PCT/JP2017/016861

Publication Date:

January 11, 2018

Filing Date:

April 27, 2017

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI LTD (JP)

International Classes:

B66B5/02; B66B1/32

Domestic Patent References:

WO2015093217A1	2015-06-25
WO2010058453A1	2010-05-27

Foreign References:

JP2007276986A

2007-10-25

Other References: