Title:
AUTOMATIC VOLTAGE ADJUSTING DEVICE
Document Type and Number:
Japanese Patent JP2016046307
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an automatic voltage adjusting device having a long lifetime, which is adaptable to instantaneous voltage variation occurring frequently without causing increase of the cost and inducing increase of the size of the device.SOLUTION: In a tap changer 8 for switching the tap of an adjustment transformer 2, switch main circuits of thyristor switches SS and switch main circuits of mechanical switches MS as load current change-over switches A to C and T1, T2 having liability to switch load current of the adjustment transformer are connected to one another in parallel to construct a composite switch. The thyristor switch SS and the mechanical switch MS constituting the load current change-over switch are controlled so that the thyristor switch SS is set to ON-state, and then the mechanical switch MS is set to ON-state when the load current change-over switch is set to ON-state, and the mechanical switch MS is set to OFF-state and then the thyristor switch SS is set to OFF-state when the load current change-over switch is set to OFF-state.SELECTED DRAWING: Figure 1
Inventors:
SHIRATO NORIAKI
Application Number:
JP2014167523A
Publication Date:
April 04, 2016
Filing Date:
August 20, 2014
Export Citation:
Assignee:
DAIHEN CORP
International Classes:
H01F29/04; G05F1/10; G05F1/14
Domestic Patent References:
| JP2014115770A | 2014-06-26 | |||
| JP347026253B | ||||
| JP2004039958A | 2004-02-05 | |||
| JPS4915923A | 1974-02-12 | |||
| JPS61182115A | 1986-08-14 |
Foreign References:
| US20090230933A1 | 2009-09-17 |
Attorney, Agent or Firm:
Shinichi Kikuchi
Toru Kikuchi
Hidetoshi Matsumoto
Toru Kikuchi
Hidetoshi Matsumoto
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