Title:
CONTROLLER OF INVERTER
Document Type and Number:
Japanese Patent JPS6046796
Kind Code:
A
Abstract:
PURPOSE:To always stably operate a motor by storing voltage and frequency patterns in an ROM and forming the patterns for avoiding the unstable range in response to the motor. CONSTITUTION:A frequency voltage instruction unit 40 which receives a frequency set signal from a frequency setter 30, calculates the output frequency and voltage of an inverter and outputs a voltage command and a frequency command, and an ROM50 for previously storing the switching pattern in response to the voltage command and the frequency command. The ROM50 stores the pattern of the output voltage corresponding to the output frequency by deciding the constant time tD for preventing the shortcircuit of a DC power source in the low output frequency range and the ratio of the times that the elements of the inverters become ON, and thereby stably controlling to operate the motor.
Inventors:
KATSUTOU MASAYUKI
IWASAKI MASAHIKO
IWASAKI MASAHIKO
Application Number:
JP15374583A
Publication Date:
March 13, 1985
Filing Date:
August 23, 1983
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02P27/06; H02M7/48; (IPC1-7): H02P7/63
Domestic Patent References:
| JPS57180395A | 1982-11-06 |
Attorney, Agent or Firm:
Masuo Oiwa
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