Dielectric strength voltage testing method for electronics device

Patent metadata

Field	Value
Publication number	US-9404958-B2
Application number	US-201313766241-A
Country	US
Kind code	B2
Filing date	Feb 13, 2013
Priority date	Mar 27, 2012
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

A first X capacitor is connected between one of a plurality of hot line sections of a hot line that is located at an output side of a first relay as viewed from a commercial alternating-current power supply, and one of a plurality of neutral line sections of a neutral line that is located at an input side of a second relay as viewed from the commercial alternating-current power supply. A second X capacitor is connected between one of the hot line sections that is located at the output side of the first relay as viewed from the commercial alternating-current power supply, and one of the neutral line sections that is located at an output side of the second relay as viewed from the commercial alternating-current power supply.

First claim

What is claimed is:

1. An electronics device comprising:
a hot line and a neutral line forming a pair of power supply lines connected to a commercial alternating-current power supply;
a first switch element configured to switch on and off the hot line;
a second switch element configured to switch on and off the neutral line;
a common mode inductor switchably connectable to the hot line and to the neutral line;
a first capacitor connected between one of a plurality of hot line sections of the hot line and one of a plurality of neutral line sections of the neutral line, and configured to apply an alternating current for a dielectric strength voltage test from the neutral line section located at the input side of the second switch element to the hot line section located at the output side of the first switch element, even in a state where the first switch element is switched off, wherein the one of the plurality of hot line sections is located at an output side of the first switch element as viewed from the commercial alternating-current power supply, and the one of the plurality of neutral line sections is located at an input side of the second switch element as viewed from the commercial alternating-current power supply; and
a second capacitor connected between one of the plurality of hot line sections located at the output side of the first switch element as viewed from the commercial alternating-current power supply, and one of the plurality of neutral line sections located at an output side of the second switch element as viewed from the commercial alternating-current power supply, and configured to apply the alternating current for the dielectric strength voltage test from the hot line section located at the output side of the first switch element to the neutral line section located at the output side of the second switch element, even in a state where the second switch element is switched off;
wherein the first and second capacitors and the common mode inductor are each a part of a filter configured to filter line noise from the commercial alternating-current power supply.

2. The electronics device according to claim 1 , wherein
when the dielectric strength voltage test is performed, an input terminal of the hot line and an input terminal of the neutral line are shorted.

3. The electronics device according to claim 2 , wherein
when the dielectric strength voltage test is performed, the first and second switch elements are both off.

4. An electronics device comprising:
a hot line and a neutral line forming a pair of power supply lines connected to a commercial alternating-current power supply;
a first switch element configured to switch on and off the hot line;
a second switch element configured to switch on and off the neutral line;
a common mode inductor switchably connectable to the hot line and to the neutral line;
a first capacitor connected between one of a plurality of hot line sections of the hot line, the one of the plurality of hot line sections being located at an input side of the first switch element as viewed from the commercial alternating-current power supply, and one of a plurality of neutral line sections of the neutral line, the one of the plurality of neutral line sections being located at an output side of the second switch element as viewed from the commercial alternating-current power supply, and configured to apply an alternating current for a dielectric strength voltage test from the neutral line section located at the output side of the second switch element to the hot line section located at the input side of the first switch element, even in a state where the first switch element is switched off; and
a second capacitor connected between one of the plurality of hot line sections located at the output side of the first switch element as viewed from the commercial alternating-current power supply, and one of the plurality of neutral line sections located at an output side of the second switch element as viewed from the commercial alternating-current power supply, and configured to apply the alternating current for the dielectric strength voltage test from the hot line section located at the output side of the first switch element to the neutral line section located at the output side of the second switch element, even in a state where the second switch element is switched off;
wherein the first and second capacitors and the common mode inductor are each a part of a filter configured to filter line noise from the commercial alternating-current power supply.

5. The electronics device according to claim 4 , wherein
when the dielectric strength voltage test is performed, an input terminal of the hot line and an input terminal of the neutral line are shorted.

6. The electronics device according to claim 5 , wherein
when the dielectric strength voltage test is performed, the first and second switch elements are both off.

7. A method for performing a dielectric strength voltage test on an electronics device, wherein
the electronics device includes
a hot line and a neutral line forming a pair of power supply lines connected to a commercial alternating-current power supply;
a first switch element configured to switch on and off the hot line,
a second switch element configured to switch on and off the neutral line,
a common mode inductor switchably connectable to the hot line and to the neutral line;
a first capacitor connected between one of a plurality of hot line sections of the hot line, the one of the plurality of hot line sections being located at an output side of the first switch element as viewed from the commercial alternating-current power supply, and one of a plurality of neutral line sections of the neutral line, the one of the plurality of neutral line sections being located at an input side of the second switch element as viewed from the commercial alternating-current power supply, and
a second capacitor connected between one of the plurality of hot line sections located at the output side of the first switch element as viewed from the commercial alternating-current power supply, and one of the plurality of neutral line sections located at an output side of the second switch element as viewed from the commercial alternating-current power supply, and
the method comprises the steps of:
applying an alternating current for the dielectric strength voltage test between an input terminal of the hot line and an input terminal of the neutral line;
applying the alternating current for the dielectric strength voltage test from the neutral line section located at the input side of the second switch element to the hot line section located at the output side of the first switch element, using the first capacitor even in a state where the first switch element is switched off; and
applying the alternating current for the dielectric strength voltage test from the hot line section located at the output side of the first switch element to the neutral line section located at the output side of the second switch element, using the second capacitor even in a state where the second switch element is switched off;
wherein the first and second capacitors and the common mode inductor are each a part of a filter configured to filter line noise from the commercial alternating-current power supply.

8. The method according to claim 7 , further comprising
turning off the first and second switch elements when the alternating current for the dielectric strength voltage test is applied.

9. A method for performing a dielectric strength voltage test on an electronics device, wherein
the electronics device includes
a hot line and a neutral line forming a pair of power supply lines connected to a commercia

Assignees

• Canon Kk

Inventors

• Nozaki Tetsuya

Classifications

• G01R31/64

  Testing of capacitors · CPC title

• G01R31/129

  of components or parts made of semiconducting materials; of LV components or parts (G01R31/18 takes precedence) · CPC title

• G01R31/18 Primary

  Subjecting similar articles in turn to test, e.g. go/no-go tests in mass production · CPC title

• G06F1/26 Primary

  Power supply means, e.g. regulation thereof (for memories G11C) · CPC title

• G01R31/028

  Physics · mapped topic