Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
電動モータ駆動装置
Document Type and Number:
Japanese Patent JP4313203
Kind Code:
B2
Abstract:
The invention relates to an electric motor drive for operating an alternating-current motor. The electric motor drive comprises a frequency converter for controlling the motor, which frequency converter comprises a rectifier and an inverter implemented using semiconductor switches arranged in a bridge, and an intermediate circuit placed between the rectifier and the inverter and comprising a capacitor. According to the invention, the electric motor drive additionally comprises two regulating units, the first one of which contains an inductor unit provided at the input of the frequency converter and at the same time at the input of the rectifier, the inductors comprised in the unit being connected to each phase; and an intermediate circuit with a low-value capacitor, of the order of 50 muF, while the second one contains an auxiliary switch, to which the supply of electric power is arranged to occur via a safety relay, the auxiliary switch being so connected to selected semiconductor switches of the inverter bridge that the control signal for a selected semiconductor switch will pass via the auxiliary switch when the latter is in a conducting state; and a current measuring unit for measuring and/or monitoring the supply current to the electric motor.

Inventors:
Jahkonen, Pekka
Application Number:
JP2003544884A
Publication Date:
August 12, 2009
Filing Date:
November 13, 2002
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KONE CORPORATION
International Classes:
H02P27/06; H02M1/08; H02M1/088; H02M5/458; H02M7/48; H02M7/797; H02P3/22
Domestic Patent References:
JP10285909A
JP2001217577A
JP2003521115A
Attorney, Agent or Firm:
Takao Katori