Title:
CONTROL DEVICE AND CONTROL METHOD FOR ELECTROMAGNETIC RECIPROCATING PUMP
Document Type and Number:
WIPO Patent Application WO/2016/067742
Kind Code:
A1
Abstract:
A control device for an electromagnetic reciprocating pump, said control device including: a current sensor (64) that detects current flowing in an electromagnetic coil (44); a switching element (62) that turns on/off a DC voltage applied to the electromagnetic coil (44); and a computation circuit (61) that generates control signals for turning on/off the switching element (62). The control signals include a first signal that repeatedly, and with a prescribed cycle (ΔTs), turns on the switching element (62) and then turns off the switching element after a prescribed period (ΔTon) has elapsed, and a second signal that, during the prescribed period (ΔTon), turns off the switching element (62) after a detected current value has risen to a prescribed upper limit threshold value, and turns on the switching element (62) after the detected current value has decreased to a prescribed lower limit threshold value. Thus, it is possible to handle different power source voltages while reducing power consumption and suppressing an increase in the temperature of the electromagnetic coil.
Inventors:
FUJIWARA ISSEI (JP)
Application Number:
PCT/JP2015/074754
Publication Date:
May 06, 2016
Filing Date:
August 31, 2015
Export Citation:
Assignee:
NIKKISO EIKO KK (JP)
International Classes:
F04B49/06; F04B17/04; F04B49/10
Foreign References:
| JP2001153058A | 2001-06-05 | |||
| JP2014142006A | 2014-08-07 | |||
| JP2013160305A | 2013-08-19 | |||
| JPH01220412A | 1989-09-04 | |||
| JPH08185779A | 1996-07-16 | |||
| JP2011069481A | 2011-04-07 | |||
| JPS5832979A | 1983-02-26 | |||
| JPH0462368U | 1992-05-28 |
Attorney, Agent or Firm:
YKI Patent Attorneys (JP)
Patent business corporation YKI international patent firm (JP)
Patent business corporation YKI international patent firm (JP)
Download PDF: