Title:
CONTROLLER FOR INVERTER DURING INSTANTANEOUS POWER FAILURE
Document Type and Number:
Japanese Patent JPS5886873
Kind Code:
A
Abstract:
PURPOSE:To make it possible to control an inverter even during a prolonged instantaneous power failure, by a method wherein a smoothing capacitor of an inverter main circuit is constituted by two series-connected capacitors, and the voltage between the neutral point thereof and one phase line of output lines of the inverter is employed as an inverter control power source. CONSTITUTION:The voltage generated an AC power source 1 is insulated by a transformer 6, which a connected to a power failure detecting circuit 27. To form a power source for an inverter control circuit 140, the AC power source 1 is connected to the primary side of a transformer 26 through a-contacts 321, 323 of a changeover relay 32, and connection is made such that a DC voltage of an inverter main circuit, i.e., the voltage between a neutral point 300 formed by capacitors 3A, 3B and one of inverter output terminals, e.g., the U phase is supplied to other taps on the primary side of the transformer 26 through b-contacts 322, 324 of the changeover relay 32. The voltage provided by a secondary winding of the transformer 26 is rectified as well as smoothed and supplied to the inverter control circuit 140.
Inventors:
OKATSUCHI CHIHIRO
Application Number:
JP18468481A
Publication Date:
May 24, 1983
Filing Date:
November 18, 1981
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
H02M7/48; H02M7/5387; H02P27/06; (IPC1-7): H02M7/48; H02P13/20
Domestic Patent References:
| JPS4829248A | 1973-04-18 |
Attorney, Agent or Firm:
Kazuo Sato