Title:
INVERTER OPERATION SYSTEM AT POWER INTERRUPTION TIME
Document Type and Number:
Japanese Patent JPS6126496
Kind Code:
A
Abstract:
PURPOSE:To restart the operation of an induction motor immediately when a power interruption is recovered at AC side interruption time by receiving power for controlling an inverter from a DC middle circuit. CONSTITUTION:When an AC power source is interrupted, a DC middle circuit supplies power to a motor 6 while reducing the voltage. When the voltage of the middle circuit decreases to E1 of the first set value, the motor 6 becomes a generator to discharge the held kinetic energy while decelerating the speed as a generator to enter so-called brake operation. Thus, the voltage of the middle circuit again starts increasing, but if the power interruption is finished in a short time, and power transmission is restarted at a time t2, it returns to the original operation state. Then, when power interruption occurs for a long time at a time t3, the operation is continued while producing and receiving the kinetic energy, the speed continuously decreases by consuming the kinetic energy, and eventually stops.
Inventors:
KIDOGUCHI HIDETAKA
Application Number:
JP14555984A
Publication Date:
February 05, 1986
Filing Date:
July 13, 1984
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H02P27/06; H02M7/48; H02M7/72; H02P1/26; (IPC1-7): H02P7/63
Domestic Patent References:
| JPS5759495A | 1982-04-09 | |||
| JP57093097B | ||||
| JPS5846870A | 1983-03-18 | |||
| JPS57208870A | 1982-12-22 |
Attorney, Agent or Firm:
Iwao Yamaguchi
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