Power supply device and high potential test method thereof

Patent metadata

Field	Value
Publication number	US-9812854-B2
Application number	US-201615013941-A
Country	US
Kind code	B2
Filing date	Feb 2, 2016
Priority date	Jun 3, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A power supply device is disclosed. A circuit board is disposed inside a conductive housing. A rectifying module is disposed on the circuit board and has primary and secondary sides. The grounding module includes a first grounding element, a second grounding element, and a fastening element. Two terminals of the first surge protection module are respectively electrically connected to the primary side and the first grounding element. Two terminals of the second surge protection module are respectively electrically connected to the secondary side and the second grounding element. The second grounding element and the first grounding element are not directly connected. The fastening element passes through the conductive housing, the circuit board, the first grounding element, and the second grounding element so that the conductive housing, the first grounding element, and the second grounding element are electrically connected to one another.

First claim

What is claimed is:

1. A power supply device, comprising:
a conductive housing;
a circuit board, disposed inside the conductive housing;
a rectifying module, disposed on the circuit board and having a primary side for input power and a secondary side for a load;
a first surge protection module, wherein one terminal of the first surge protection module is electrically connected to the primary side;
a second surge protection module, wherein one terminal of the second surge protection module is electrically connected to the secondary side; and
a grounding module, comprising:
a first grounding element, electrically connected to the other terminal of the first surge protection module electrically connected to the primary side of the rectifying module;
a second grounding element, electrically connected to the other terminal of the second surge protection module electrically connected to the secondary side of the rectifying module, wherein the second grounding element and the first grounding element are not directly connected; and
a fastening element, passing through the conductive housing, the circuit board, the first grounding element, and the second grounding element so that the conductive housing, the first grounding element, and the second grounding element are electrically connected to one another.

2. The power supply device of claim 1 , wherein the first grounding element comprises:
a first fixing portion, opposite to the circuit board, wherein the first fixing portion has a first opening, and the fastening element passes through the first opening; and
a first inserting portion, extended from the first fixing portion to the circuit board, wherein the first inserting portion is inserted into the circuit board.

3. The power supply device of claim 2 , wherein the second grounding element comprises:
a second fixing portion, opposite to the circuit board, wherein the second fixing portion has a second opening, and the fastening element passes through the second opening; and
a second inserting portion, extended from the second fixing portion to the circuit board, wherein the second inserting portion is inserted into the circuit board.

4. The power supply device of claim 3 , wherein the circuit board has a first electrical connection hole and a second electrical connection hole, the first inserting portion has a first pin, the second inserting portion has a second pin, the first pin is inserted into the first electrical connection hole, and the second pin is inserted into the second electrical connection hole.

5. The power supply device of claim 4 , wherein the size of the first pin is different from that of the second pin.

6. The power supply device of claim 3 , wherein the grounding module further comprises an insulation element, the insulation element carries and fixes the first grounding element and the second grounding element, and the fastening element passes through the insulation element.

7. The power supply device of claim 6 , wherein the insulation element comprises:
a bottom surface, abutting the circuit board;
a first carrying portion, opposite to the bottom surface, wherein the first fixing portion is disposed on the first carrying portion; and
a second carrying portion, opposite to the bottom surface, wherein the second fixing portion is disposed on the second carrying portion, and the distance from the bottom surface to the first carrying portion is different from that from the bottom surface to the second carrying portion.

8. The power supply device of claim 7 , wherein the first carrying portion has a first engagement portion engaging with the first grounding element, and the second carrying portion has a second engagement portion engaging with the second grounding element.

9. The power supply device of claim 1 , further comprising a spacer disposed between the conductive housing and the circuit board.

10. A high potential test method for a power supply device, wherein the power supply device comprises a conductive housing, a rectifying module, a first surge protection module, and a second surge protection module, the first surge protection module is connected to the primary side of the rectifying module for input power, the second surge protection module is connected to the secondary side of the rectifying module for a load, and the high potential test method comprises:
keeping the first surge protection module and the second surge protection module electrically floating;
providing a high potential test power, wherein one terminal of the high potential test power is connected to the primary side of the rectifying module, and the other terminal is connected to the secondary side of the rectifying module;
providing a high voltage for the power supply device by the high potential test power and lasting for a predetermined time;
removing the high potential test power after the predetermined time; and
after removing the high potential test power, fastening a fastening element to the conductive housing, wherein the fastening element passes through a first grounding element electrically connected to the first surge protection module electrically connected to the primary side of the rectifying module and a second grounding element electrically connected to the second surge protection module electrically connected to the secondary side of the rectifying module so that the conductive housing, the first grounding element, and the second grounding element have equal electrical potentials.

11. The high potential test method of claim 10 , wherein before the step of fastening the fastening element to the conductive housing, the method further comprises:
connecting one terminal of the high potential test power to the primary side and grounding the other terminal;
providing the high voltage for the power supply device by the high potential test power and lasting for another predetermined time; and
removing the high potential test power after another predetermined time.

12. The high potential test method of claim 10 , wherein before the step of fastening the fastening element to the conductive housing, the method further comprises:
connecting one terminal of the high potential test power to the secondary side and grounding the other terminal;
providing the high voltage for the power supply device by the high potential test power and lasting for another predetermined time; and
removing the high potential test power after another predetermined time.

Assignees

• Delta Electronics Inc

Inventors

• Yang Shan-Chun
• Lin Cheng-Chun
• Chang Yi-Hua

Classifications

• G01R31/40

  Testing power supplies (testing photovoltaic devices H02S50/10) · CPC title

• H02H7/1252

  responsive to overvoltage in input or output, e.g. by load dump · CPC title

• H05K7/142

  Spacers not being card guides · CPC title

• H05K1/0215

  Grounding of printed circuits by connection to external grounding means · CPC title

• G01R31/42

  AC power supplies · CPC title