Title:
FREQUENCY CONVERTER
Document Type and Number:
Japanese Patent JPS6035964
Kind Code:
A
Abstract:
PURPOSE:To control to prevent stalling of a motor load and to enable to control to limit the acceleration by selecting a control signal for controlling the output frequency of a plurality of power inverters prepared and applying it to the inverter. CONSTITUTION:A frequency set signal from a frequency setter 6 is applied to a reference signal input terminal of a comparator 17. The output of a D/A converter 18 is applied to the comparison signal input terminal of the comparator 17, and the output of the comparator 17 is applied to a controller 8 made of a microcomputer or the like. The controller 8 increases a pulse signal by binary code and outputs it whenever a signal from the comparator 17 is received at the preset accelerating rate. The binary code pulse signal is applied through a D/A converter 18 to an oscillator 19 and the comparator 17. A control signal stored in a memory 12 is read out on the basis of the output of the oscillator 19, and the control signal is applied through an amplifier 13 to a power inverter 4.
More Like This:
| JPS51122727 | INDUCTIVE LOAD POWER SUPPLY |
| JPS5999972 | FREQUENCY VARYING DEVICE |
Inventors:
SANAKA YOUZOU
Application Number:
JP14275483A
Publication Date:
February 23, 1985
Filing Date:
August 03, 1983
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
H02M5/45; H02M7/48; (IPC1-7): H02M5/44
Attorney, Agent or Firm:
Takehiko Suzue