Title:
PARALLEL RUNNING SYSTEM FOR INVERTER DEVICE
Document Type and Number:
Japanese Patent JPS58148694
Kind Code:
A
Abstract:
PURPOSE:To perform power-saving operation of an inverter device by disconnecting at least one inverter from a parallel power source system during an ordinary operation of driven AC motor groups in a standby state, thereby enhancing the operating efficiency of the inverter device. CONSTITUTION:A load 50, to which many AC motors are connected, is driven by inverters 1-3. In order to ordinarily operate the load 50 with the motors, the inverters are operated in parallel, the AC motor groups of the first group of the load 50 are first started and operated in a rated state. Then, the second group are started and operated in a rated state, the following groups are sequentially started and operated in total motor groups in the ordinarily operating state. At this time, the inverter 3 is, for example, disconnected, and the inverters 1, 2 are operated in parallel. In this manner, the load rate of the inverters 1, 2 is raised to increase the operating efficiency, and the loss of the entire parallel system can be reduced. The inverter 3 can be returned to the parallel system in response to the operating state of the system.
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Inventors:
ICHIKAWA KOUSAKU
Application Number:
JP2990382A
Publication Date:
September 03, 1983
Filing Date:
February 26, 1982
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
H02M7/493; H02P5/74; (IPC1-7): H02M7/48; H02P13/20
Attorney, Agent or Firm:
Takehiko Suzue