Patent Application
20130277036
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 the output voltages of the power supplies. Burn in testing is an important test in determining the reliability of the power supply. A typical burn in test uses a test chamber to test a power supply in a temperature of 50 Celsius degrees. However, the typical test chamber can test a large number of power supplies all at one time. When the typical test chamber is used to test a few power supplies, the test chamber is being used inefficiently.
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 refrigerating module 300 includes a first relay, a first refrigerating unit 310, and a second refrigerating unit 320. The first relay includes a first winding unit M1, a first switch unit K1, and a second switch unit K2. A first terminal of the first winding unit M1 is electrically connected to the first control signal output terminal PA0 to receive the first control signal. A second terminal of the first winding unit M1 receives a first DC voltage. First terminals of the first switch unit K1 and the second switch unit K2 are electrically connected to the power module 800 to receive a second DC voltage. Second terminals of the first switch unit K1 and the second switch unit K2 are electrically connected to the first refrigerating unit 310. Second terminals of the first switch unit K1 and the second switch unit K2 are electrically connected to the second refrigerating unit 320. In one embodiment, the first DC voltage is +5V.
The heating module 400 includes a second relay, a third relay, a fourth relay, a first heating unit 410, a second heating unit 420, and a third heating unit 430. The second relay includes a second winding unit M2 and a third switch unit K3. A first terminal of the second winding unit M2 is electrically connected to the second control signal output terminal PA1 to receive the second control signal. A second terminal of the second winding unit M2 is grounded. A first terminal of the third switch unit K3 receives the second DC voltage. A second terminal of the third switch unit K3 is grounded via the first heating unit 410. The first heating unit 410 includes a plurality of thermal resistors R1-R3 connected in parallel. 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 second control signal output terminal PA2 to receive the second control signal. A second terminal of the third winding unit M3 is grounded. A first terminal of the fourth switch unit K4 receives the second DC voltage. A second terminal of the fourth switch unit K4 is grounded via the second heating unit 420. The second heating unit 420 includes a plurality of thermal resistors R4-R6 connected in parallel. The fourth relay includes a fourth winding unit M4 and a fifth switch unit K5. A first terminal of the fourth winding unit M4 is electrically connected to the second control signal output terminal PA3 to receive the second control signal. A second terminal of the fourth winding unit M4 is grounded. A first terminal of the fifth switch unit K5 receives the second DC voltage. A second terminal of the fifth switch unit K5 is grounded via the third heating unit 430. The third heating unit 430 includes a plurality of thermal resistors R7-R9 connected in parallel.
The decoding module 500 includes a plurality of registers U0-U3. Each of the plurality of registers U0-U3 includes two serial data input terminals a1, a2, a clock signal input terminal a3 and a plurality of digital signal output terminals b1-b8. The serial data input terminals a1, a2 of the register U0 are electrically connected to the serial data signal output terminal PB0 of the micro controller. The serial data input terminals a1, a2 of the register U1 are electrically connected to the second digital signal output terminal b8 of the register U0. The serial data input terminals a1, a2 of the register U2 are electrically connected to the second digital signal output terminal b8 of the register U1. The serial data input terminals a1, a2 of the register U3 are electrically connected to the second digital signal output terminal b8 of the register U2. The clock signal input terminals a3 of the plurality of registers U0-U3 are electrically connected to the clock signal output terminal PB1 of the micro controller.
The display module 600 includes a plurality of eight-segment numeral tubes D0-D3. Each of the plurality of eight-segment numeral tubes D0-D3 includes a plurality of digital signal input terminals c1-c8. The plurality of digital signal input terminals c1-c8 of the plurality of eight-segment numeral tubes D0-D3 are electrically connected to the plurality of digital signal output terminals b1-b8 of the plurality of registers U0-U3.
The alarm module 700 includes a transistor Q and buzzer LS. A base of the transistor Q is electrically connected to the alarm signal output terminal PC0 of the micro controller. An emitter of the transistor Q is electrically connected to an anode of the buzzer LS. A collector of the transistor Q receives the first DC voltage. A cathode of the buzzer LS is grounded. In one embodiment, the transistor Q is a NPN type transistor.
The power module 800 includes a voltage decreasing circuit 810 and a rectification circuit 820. The voltage decreasing circuit 810 includes a fuse F and a transformer T. The rectification circuit 820 includes four diodes electrically connected together end to end. The voltage decreasing circuit 810 receives a 220V AC voltage signal and converts the 220V AC voltage signal to a 16V AC voltage signal. The rectification circuit 820 receives the 16V AC voltage signal and converts the 16V AC voltage signal to a +16V second DC voltage. The +16V second DC voltage is provided to the refrigerating module 300 and the heating module 400.
In a working state, the power supply 910 is put in the test chamber 900. The temperature detecting unit 100 detects the temperature signals in the test chamber 900, and transmits the temperature signals to the control unit 200 via the temperature signal input terminal PC0. When the temperature detecting unit 100 detects the value of the temperature signal is less than the predetermined temperature value, the plurality of second control signal output terminals PA1-PA3 of the micro controller output high voltage level second control signals to the second winding unit M2, the third winding unit M3, and the fourth winding unit M4. The second winding unit M2, the third winding unit M3, and the fourth winding unit M4 are powered on to close the third switch unit K3, the fourth switch unit K4, and the fifth switch unit K5. The first heating unit 410, the second heating unit 420, and the third heating unit 430 receive the +16V second DC voltage and control the plurality of thermal resistors R1-R9 generate heat.
The temperature in the test chamber 900 increases as plurality of thermal resistors R1-R9 generate heat. When the temperature detecting unit 100 detects the value of the temperature signal is greater than the predetermined temperature value, the first control signal output terminal PA0 of the micro controller outputs a low voltage level control signal to the first winding unit M1. The first winding unit M1 is powered on to close the first switch unit K1 and the second switch unit K2. The first refrigerating unit 310 and the second refrigerating unit 320 receive the +16V second DC voltage and refrigerate in the test chamber 900 until the value of the temperature signal is equal to the predetermined temperature value. At least one of the plurality of second control signal output terminals PA1-PA3 of the micro controller outputs a low voltage level second control signal to the second winding unit M2, the third winding unit M3, and the fourth winding unit M4. At least one of the second winding unit M2, the third winding unit M3, and the fourth winding unit M4 is powered off to open the third switch unit K3, the fourth switch unit K4, and the fifth switch unit K5. The value of the temperature signal in the test chamber 900 keeps the predetermined temperature value in the test chamber 900.
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 |
|---|---|---|---|
| 201210121547.8 | Apr 2012 | CN | national |
