Title:
PWM SIGNAL GENERATOR FOR PWM INVERTER
Document Type and Number:
Japanese Patent JPH05199763
Kind Code:
A
Abstract:
PURPOSE: To accelerate a high-speed smoothly and to provide a PWM signal generator of a inverter suitable for driving the motor at a certain speed.
CONSTITUTION: A PWM signal generator is constituted of a plurality of oscillators 1 and 2, a switch 3 switching the oscillators, a counter 4 driven by signals from the oscillators, a preset circuit 5 presetting addresses specified in the counter in advance and a read-only memory 6 outputting data of the addresses specified by output signals of the counter 4, and the data of the read- only memory 6 is so constituted that change-over signals of the oscillators, preset signals of the counter and FW signals driving a motor are included.
Inventors:
NAKAJIMA KAORU
YAMAMOTO MASAKAZU
CHIYOUSHIYA HAJIME
YAMAMOTO MASAKAZU
CHIYOUSHIYA HAJIME
Application Number:
JP33001191A
Publication Date:
August 06, 1993
Filing Date:
November 19, 1991
Export Citation:
Assignee:
EBARA CORP
EBARA DENSAN KK
EBARA DENSAN KK
International Classes:
H02M7/48; H03K7/08; (IPC1-7): H02M7/48; H03K7/08
Attorney, Agent or Firm:
Isamu Watanabe (1 person outside)