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Patent Searching and Data


Title:
CONTROLLER OF ELEVATOR
Document Type and Number:
Japanese Patent JP2009142103
Kind Code:
A
Abstract:

To provide a controller of an elevator capable of properly protecting regenerative resistors even if erroneous application or failure occurs with the regenerative resistors.

The controller comprises a regenerative power calculating part 34 which calculates a regenerative power from a speed instruction signal and a torque instruction signal at regenerative operation, a voltage calculating part 36 which calculates a voltage applied to a regenerative resistor 11 from on/off signal of a drive circuit 54, a resistance value calculating part 37 which calculates a resistance value of the regenerative resistor 11 from the regenerative power and applied voltage, and a judging part 38 which determines abnormality of the regenerative resistor 11 if the calculated resistance value differs from a preset resistance value by a specified value or more.


Inventors:
KARIYA YOSHITAKA
Application Number:
JP2007317191A
Publication Date:
June 25, 2009
Filing Date:
December 07, 2007
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02P3/18; B66B1/30; B66B5/02
Domestic Patent References:
JP2003333873A2003-11-21
Foreign References:
WO2007039928A12007-04-12
Attorney, Agent or Firm:
高橋 省吾
稲葉 忠彦
村上 加奈子
中鶴 一隆