Patent Application
20130200920
1. Technical Field
The present disclosure relates to a power supply test system for testing reliability of a power supply.
2. Description of Related Art
Computer power supplies are capable of converting alternating current into direct current. The reliability of a power supply is measured by comparing the input and output voltages of the power supplies. Over voltage testing is an important test in determining the reliability of the power supply. A typical over voltage test uses an oscillograph to test a current and a voltage input in the power supply. However, the typical testing method cannot test peripheral circuits in the power supply. Therefore, the over voltage testing is not complete and comprehensive.
Therefore there is a need for improvement in the art.
Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one”.
The voltage storage circuit 200 includes a first resistor R1, a plurality of first capacitors C1-C11, a plurality of second capacitors C12-C22, a plurality of third capacitors C23-C33, and a plurality of fourth capacitors C34-C44. Anodes of each of the first capacitors C1-C11 are electrically connected to the connection point between the first and third diodes D1 and D3 via the first resistor R1. Anodes of each of the second capacitors C12-C22 are electrically connected to cathodes of each of the first capacitors C1-C11. Cathodes of each second capacitor C12-C22 is electrically connected to the connection point between the second and fourth diodes D2 and D4. Anodes of the third capacitors C23-C33 are electrically connected to the anodes of the first capacitors C1-C11. Anodes of the fourth capacitors C34-C44 are electrically connected to cathodes of the third capacitors C23-C33. Cathodes of the fourth capacitors C34-C44 are electrically connected to the cathodes of the second capacitors C12-C22.
The voltage output circuit 300 includes a second relay, a second leakage protector 301, and a push button S2. The second relay includes a second winding unit M2 and a third switch unit K3. The anodes of the first capacitors C1-C11 and the cathodes of the second capacitors C12-C22 are electrically connected to input terminals of the second leakage protector 301. A first output terminal of the second leakage protector 301 is electrically connected to the power supply 600. A second output terminal of the second leakage protector 301 is electrically connected to the power supply 600 via the third switch unit K3. A first terminal of the second winding unit M2 is electrically connected to a live wire output terminal of the second AC voltage via the push button S2. A second terminal of the second winding unit M2 is electrically connected to a neutral wire output terminal of the second AC voltage.
The discharge circuit 400 includes a second resistor R2 and a third relay. The third relay includes a third winding unit M3 and a fourth switch unit K4. A first terminal of the third winding unit M3 is electrically connected to the live wire output terminal of the second AC voltage via the multiple switch S1. A second terminal of the third winding unit M3 is electrically connected to the neutral wire output terminal of the second AC voltage. The cathodes of the second capacitors C12-C22 are electrically connected to the connection point between the first and third diodes D1 and D3 via the fourth switch unit K4 and the second resistor R2 connected in series. In one embodiment, the switch units K1-K4 are normally-open contact switches.
The voltage display circuit 500 includes an adapter 501 and a voltmeter 502. Input terminals of the adapter 501 are electrically connected to the live wire output terminal and the neutral wire output terminal of the second AC voltage. Output terminals of the adapter 501 are electrically connected to input terminals of the voltmeter 502. Output terminals of the voltmeter 502 are electrically connected to the anodes of the first capacitors C1-C11 and the cathodes of the second capacitors C12-C22. In one embodiment, the adapter 501 is adapted to convert the +220V second AC voltage to a +5V second DC voltage which is provided to the voltmeter 502.
In a working state, when the +274V first AC voltage charges the voltage storage circuit 200, the multiple switch Si is activated to provide the +220V second AC voltage to the first winding unit M1. The first and second switch units K1 and K2 are closed. The +274V first AC voltage charges the plurality of capacitors C1-C44 via the first leakage protector 101, the diodes D1-D4, and the first resistor R1. The voltage value of the remaining voltages in the voltage storage circuit 200 is displayed on the voltmeter 502. When the voltage storage circuit 200 is charged to +380V, the multiple switch S1 is activated and the push button S2 is pressed to provide the +220V second AC voltage to the second winding unit M2. The third switch unit K3 is closed. The voltage storage circuit 200 discharges the +380V first DC voltage to the power supply 600 via the second leakage protector 301 and the third switch unit K3.
When the test is complete, the multiple switch Si is activated to provide the +220V second AC voltage to the third winding unit M3. The fourth switch unit K4 is closed. The remaining voltages in the plurality of capacitors C1-C44 are exhausted by the first and second resistors R1 and R2. In one embodiment, the first and second leakage protectors 103 and 301 are opened when there is current leakage from the +274V first AC voltage or the +380V first DC voltage.
Even though numerous characteristics and advantages of the present disclosure have been set forth in the foregoing description, together with details of the structure and function of the disclosure, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201210026110.6 | Feb 2012 | CN | national |
