Title:
PULSE TRAIN GENERATING METHOD AND DEVICE AND MOTOR ROTATION SPEED COMMAND GENERATOR EMPLOYING IT
Document Type and Number:
Japanese Patent JP2002141787
Kind Code:
A
Abstract:
To solve the problem that a conventional device using a command voltage employing a fundamental triangle wave to decide a motor rotation speed cannot control a final motor rotation speed with high accuracy because the device includes an analog error due to the circuit itself, the changeover aging and ambient temperature.
In the method and the device for generating a pulse train, two counter means that provide an output of output signals when reaching a preset count-up setting value, and a means that properly rewrites the preset count-up setting value of the two counters as required, are provided, and the output signals of the two counters is used to generate a pulse train with an optional duty factor and an optional frequency.
Inventors:
SHIMOGAMA SHIGERU
HAYASHI TAKUJI
IKEDA TATSUYA
HAYASHI TAKUJI
IKEDA TATSUYA
Application Number:
JP2001251235A
Publication Date:
May 17, 2002
Filing Date:
August 22, 2001
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H02P8/00; H03K5/156; (IPC1-7): H03K5/156; H02P8/00
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)