Title:
【発明の名称】インバータのPWM波形制御方法
Document Type and Number:
Japanese Patent JP2719927
Kind Code:
B2
Abstract:
PURPOSE:To shorten a processing time by employing a resistor, used for timer interruption, as an auxiliary resistor. CONSTITUTION:An inverter 17 is constituted of a DC power source 10 and semiconductor elements 11-16 to drive an induction motor 18. The inverter 17 is provided with an one-tip CPU 19 consisting of an A/D converter 22, a plurality of timers 23, a ROM 24, a RAM 25, a microprocessor 26 and the like. A PWM control waveform is outputted by timer interruption utilizing the one-tip CPU 19 and when a resistor, used for the timer interruption of PWM waveform output control, is used as an auxiliary resistor and a main resistor is switched to the auxiliary resistor upon interruption to effect the transfer of data for a timer processing the pulse width of the PWM output and the setting of starting, the auxiliary resistor is employed without passing the data through the RAM 25 thereby transferring the data and setting the starting. As a result, a processing time may be shortened and PWM control reduced in errors may be effected.
Inventors:
Yukio Kawa
Application Number:
JP15421588A
Publication Date:
February 25, 1998
Filing Date:
June 22, 1988
Export Citation:
Assignee:
Kasuga Electric Co., Ltd.
International Classes:
H02M7/00; H02M7/48; (IPC1-7): H02M7/48
Domestic Patent References:
| JP62290357A | ||||
| JP62217863A |