Title:
給水装置、制御装置及びインバータ
Document Type and Number:
Japanese Patent JP7286523
Kind Code:
B2
Abstract:
To reduce a probability of stopping water supply due to an overheat protection, when the water supply is restarted after stopping the water supply due to the overheat protection of an inverter.SOLUTION: A pump facility 10 has a pump 20, a motor 21 driving the pump, and an inverter 22 having a plurality switching elements and driving the motor at variable speed. An inside or an outside of the inverter has a processor 42, The processor generates a switching signal by comparing a carrier wave with a sinusoidal signal which becomes an each phase voltage command, supplies the generated switching signal to a plurality of switching elements, and lower a carrier frequency of the carrier wave from the value before the pump is stopped at timing after timing of reactivation at the time of the reactivation, after the pump is stopped due to an overheat protection.SELECTED DRAWING: Figure 1
Inventors:
Takahide Ozawa
Kazuma Nishimura
Naoki Katayama
Kazuma Nishimura
Naoki Katayama
Application Number:
JP2019222652A
Publication Date:
June 05, 2023
Filing Date:
December 10, 2019
Export Citation:
Assignee:
Ebara Corporation
International Classes:
H02M7/48; F04D15/00; F04D15/02
Domestic Patent References:
| JP8254195A | ||||
| JP2014020266A | ||||
| JP2012135119A | ||||
| JP2011229304A | ||||
| JP60157473A | ||||
| JP2017137799A |
Foreign References:
| US20150249419 | ||||
| WO2015125863A1 |
Attorney, Agent or Firm:
Seiji Ohno
Hideki Kobayashi
Hiroyuki Ohno
Koji Morita
Rika Fukami
Tomohiro Matsuno
Seiichi Sakatani
Hiroshi Nomoto
Hideki Kobayashi
Hiroyuki Ohno
Koji Morita
Rika Fukami
Tomohiro Matsuno
Seiichi Sakatani
Hiroshi Nomoto