Title:
CONTROL CIRCUIT FOR INVERTER
Document Type and Number:
Japanese Patent JPS6055864
Kind Code:
A
Abstract:
PURPOSE:To improve paticularly the accelerating torque characteristic by comparing an output frequency with a command frequency, and selecting the optimum f/V pattern for the modes of accelerating, normal and decelerating operations of a motor. CONSTITUTION:An output frequency f0 is compared by a frequency comparator 14 with a command frequency fi, a suitable f/V pattern in response to the mode of acceleration or normal operation, and a voltage command V0 is outputted along the f/V pattern. The switching pattern of a variable control element 5 is decided in response to the output frequency f0 and the voltage command V0 by a switching processor 12, and the signals of the output frequency f0 and the voltage command V0 are outputted to a motor by an inverter main circuit on the basis of the switching pattern. Thus, preferable acceleration torque is available at the accelerating time, the suitable exciting operation is enabled at the normal time, and the preferable decelerating response is enable at the decelerating time.
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Inventors:
KATSUTOU MASAYUKI
IWASAKI MASAHIKO
TADA HIDEAKI
IWASAKI MASAHIKO
TADA HIDEAKI
Application Number:
JP16165683A
Publication Date:
April 01, 1985
Filing Date:
September 02, 1983
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02M7/48; (IPC1-7): H02M7/48
Attorney, Agent or Firm:
Masuo Oiwa
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