TWI415376B - Power supply - Google Patents

Abstract

A power supply includes a power input module, a power output module, a measurement module, a display module, a switch module, and a signal obtainment module. The power input module converts an AC into a DC. The power output module supplies the DC to a testing product. The measurement module measures a voltage value and a current value of the DC. The display module displays the voltage value and the current value. The switch module is used for conducting the signal obtainment module with the measurement module. The signal obtainment module obtains an electrical signal from a partial circuit of the testing product, and supplies the electrical signal to the measurement module. The measurement module measures a voltage value and a current value according to the electrical signal. The power supply can measure the voltage value and the current value of the partial circuit of the testing product.

Description

Power Supplier

The present invention relates to a power conversion device, and more particularly to a power supply that can measure load circuit parameters.

With the advancement of technology, electronic products, such as home appliances, computer products, etc., gradually penetrate into the lives of everyone. Most of the electronic products use a DC power supply for their internal electronic components, while a typical AC power supply supplies AC power. Therefore, when using electronic products, in addition to partially utilizing batteries as a source of electricity, most of them must use a power supply to convert alternating current into various direct currents to make electronic products work properly. Power supplies can be divided into linear and switched power supplies depending on their circuit structure. The simple linear power supply consists of a transformer, a diode rectifier and a capacitor filter. The advantages are simple circuit, high stability, fast transient response, high reliability, small ripple, and low electromagnetic interference. Because of its large current transformer, it is bulky and heavy, and most of them cannot be directly mounted on the circuit board. The conversion efficiency is low, and the DC input is not a disadvantage.

The switching power supply has the advantages of high conversion efficiency, low power consumption at no load, light weight, and DC input. Therefore, although the circuit structure is more complicated than the linear power supply, the ripple is relatively large and the electromagnetic interference is relatively large, but overall, Switching power supplies are still superior to linear power supplies, so the current market for power supplies is dominated by switched power supplies.

For example, switching power supplies are often used on production lines in factories to power products to be tested. These switching power supplies provide stable DC power for the products to be tested, and also display the voltage and current supplied to the products to be tested to the testers through their own display functions, so that the testers can understand the products to be tested. Current power supply situation. However, during the product testing process, it is also necessary to measure the electrical parameters of some circuits of the product to be tested, for example, the voltage value and current value of a resistor in the product to be tested. In general, testers will use other measurement tools to obtain the above electrical parameters, such as digital multimeters. For the above reasons, the factory needs to purchase a certain number of measuring tools, thus increasing the cost of the product testing project.

In view of this, it is necessary to provide a power supply that can measure electrical parameters of a part of the circuit of the product to be tested.

A power supply device includes a power input module, a power output module, a measurement module, a display module, a switch module, and a signal acquisition module. The power input module converts the alternating current into direct current, and the power output module supplies the direct current to the product to be tested connected thereto. The switch module is respectively connected to the power output module, the measurement module and the signal acquisition module. The switch module can connect the measurement module to the power output module and the signal acquisition module respectively. When the switch module selects the electrical connection between the power supply output module and the measurement module, the measurement module measures the voltage value and current value of the direct current power supplied by the power output module to the product to be tested; When the group selects the communication number to obtain the electrical connection between the module and the measurement module, the signal acquisition module obtains an electrical signal from a part of the circuit of the product to be tested and outputs the electrical signal to the measurement module, and the measurement module according to the The electrical signal measures the corresponding voltage value and current value. The measuring module supplies the voltage value and the current value to the display module for display.

The above power supply can measure the voltage value and current value of some circuits in the product to be tested, so there is no need to purchase other measuring tools, thereby reducing the cost invested by the factory in the product testing project.

3‧‧‧AC power supply

4‧‧‧Power supply

41‧‧‧Power input module

42‧‧‧Power output module

43‧‧‧Measurement module

44‧‧‧Display module

45‧‧‧Switch Module

46‧‧‧Signal acquisition module

5‧‧‧Tested products

Figure 1 is a schematic diagram of the use of the power supply.

Figure 2 is a functional block diagram of the power supply.

Figure 3 is a circuit diagram of the switch module of the power supply

As shown in FIG. 1, it is a schematic diagram of the use of the power supply 4. The power supply 4 is connected to the AC power source 3 and the product to be tested 5, respectively. The power supply 4 converts the alternating current supplied from the alternating current power source 3 into direct current power and supplies it to the product 5 to be tested. When the power supply 4 supplies power to the product 5 to be tested, the power supply 4 can measure the voltage value and current value that it supplies to the product under test 5, and can also measure the voltage value and current value of some circuits in the product 5 to be tested.

As shown in FIG. 2, it is a functional module diagram of the power supply 4. The power supply 4 includes a power input module 41, a power output module 42, a measurement module 43, a display module 44, a switch module 45, and a signal acquisition module 46. Power input module 41 and The power output modules 42 are connected. The measurement module 43 is connected to the display module 44. The switch module 45 is connected to the power output module 42, the measurement module 43, and the signal acquisition module 46, respectively. The power input module 41 is used to convert alternating current into direct current. The power output module 42 is configured to provide the DC power to the product 5 to be tested electrically connected thereto. The switch module 45 is used for the strobe power output module 42 and the signal acquisition module 46 to be connected to the measurement module 43. When the switch module 45 is strobed by the power output module 42, the measurement module 43 measures the voltage value and current value of the direct current supplied from the power output module 42 to the product 5 to be tested. When the switch module 45 selects the communication number obtaining module 46, the measuring module 43 measures the corresponding voltage value and current value according to the electrical signal obtained from the circuit of the product to be tested 5 provided by the signal obtaining module 46.

Under normal circumstances, the switch module 45 of the power supply 4 selects the power output module 42 to maintain communication with the measurement module 43. When the power input module 41 of the power supply 4 is connected to the AC power supply 3 and the power output module 42 is connected to the product 5 to be tested, the measurement module 43 outputs the output to the product under test 5 by the measurement power output module 42. The DC electrical signal is used to obtain the current operating voltage value and current value of the current product 5 to be tested, and is displayed to the tester by the display module 44. The display module 44 can be a liquid crystal display, a light emitting diode display device, or the like. If the tester needs to test the voltage value and current value of some circuits in the product to be tested, the tester selects the signal acquisition module 46 and the measurement module 43 through the switch module 45. The tester operates the signal acquisition module 46 to obtain an electrical signal from the portion of the circuit. The measurement module 43 receives the electrical signal by the switch module 45, and measures the corresponding voltage value and current value according to the electrical signal, and displays it to the tester by the display module 44.

As shown in FIG. 3, it is a circuit diagram of the switch module 45 of the power supply 4. The switch module 45 includes a voltage gating unit 451, a current gating unit 453, and a control unit 455. The voltage gating unit 451 is a double-pole double-throw relay Y1, and the current gating unit 453 is a double-pole double-throw relay Y2. The 455 has a push button switch corresponding to the number of double pole double throw relays. The double pole double throw relay includes a double pole switch K and a coil L. One end of the coil L is connected to the DC power supply VCC, and the other end is connected to one end of the push button switch by a resistor. The other end of the push button switch is grounded. One end of the double-pole switch K can be overlapped with the power output module and the signal obtaining module 46, and the other end is connected to the measuring module 43. The control unit 455 controls the voltage gating unit 451, the current gating unit 453 to select the power output module 42 and the signal obtaining module 46 to communicate with the measuring module 43. The voltage gating unit 451 is configured to provide the power output module 42. The electrical signal provided by the electrical signal and signal acquisition module 46 is provided to the measurement module 43. The measurement module 43 measures the corresponding voltage value according to the received electrical signal. The current gating unit 453 is used to provide the power output module 42. The electrical signal provided by the electrical signal and signal acquisition module 46 is provided to the measurement module 43. The measurement module 43 measures the corresponding current value according to the received electrical signal.

Under normal conditions, the button switches s1 and s2 in the power supply 4 are in an off state; one end of the double-pole switch K of the double-pole double-throw relay Y1 is overlapped with two points a and b, and the other end is connected to the measuring module 43. Connected; one end of the double-pole double-throw relay Y2 double-knife switch K is overlapped with two points e and f, and the other end is connected with the measuring module 43. That is, the power output module 42 is in communication with the measurement module 43. When the power input module 41 is connected to the AC power source 3 and the power output module 42 is connected to the product 5 to be tested, the measurement module 43 measures the DC power output by the power output module 42. The electrical signal is used to obtain the voltage value and current value of the current product to be tested, and is displayed to the tester by the display module 44. When the tester needs to test the voltage value and current value of some circuits in the product to be tested, the tester presses the button switches s1 and s2, and the double-pole double-throw relay Y1 corresponding to the button switches s1 and s2, the double-pole double-throw relay Y2 The coil L in the middle generates a magnetic force that changes the overlapping state of its respective double-pole switch K due to the current flowing. The double-pole double-throw relay Y1 double-knife switch K is separated from the two points a and b under the influence of the magnetic force, and overlaps with two points c and d; the double-knife switch J of the double-pole double-throw relay Y2 affects the magnetic force Under the two points e, f, and overlap with g, h two points. That is, the signal acquisition module 46 is in communication with the measurement module 43. The tester operates the signal acquisition module 46 to obtain an electrical signal from the portion of the circuit. The signal acquisition module 46 includes a voltmeter pen tip 461 and an ammeter pen tip 463. The voltmeter pen tip 461 is used to obtain the electrical signal of the part of the circuit, and the measuring module 43 measures the corresponding voltage value according to the voltage signal, and is displayed to the tester by the display module 44; the ammeter pen tip 463 is used to obtain the part of the circuit The measurement module 43 measures the corresponding current value according to the current signal, and displays it to the tester by the display module 44.

Using the power supply, the measurement module 43 measures the voltage value and current value of the direct current supplied from the power output module 42 to the product to be tested 5, and provides the voltage value and current value to the display module 44 for display; When the person needs to test the voltage value and current value of some circuits in the product to be tested, the switch module 45 selects the signal obtaining module 46 to communicate with the measuring module 43 and obtains the module 46 from the part of the circuit by operating the signal. The electrical signal is obtained, and the measurement module 43 measures the corresponding voltage value and current value according to the electrical signal, and displays it by the display module 46. Testers. In this way, not only the tester's test operation is facilitated, but also the cost of the factory's product test project is reduced because there is no need to purchase other measurement tools.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above descriptions are only preferred embodiments of the present invention, and those skilled in the art will be able to include equivalent modifications or variations in the spirit of the present invention.

3‧‧‧AC power supply

4‧‧‧Power supply

41‧‧‧Power input module

42‧‧‧Power output module

43‧‧‧Measurement module

44‧‧‧Display module

45‧‧‧Switch Module

46‧‧‧Signal acquisition module

5‧‧‧Tested products

Claims (4)

A power supply device includes a power input module, a power output module, a measurement module, and a display module, wherein the power input module is configured to convert alternating current into direct current, and the power output module is configured to provide the direct current to The improvement of the connected test product is that the power supply further includes a switch module and a signal acquisition module, and the switch module is connected between the power output module and the measurement module for turning on or off the power output. An electrical connection between the module and the measurement module; the switch module is further connected between the signal acquisition module and the measurement module for turning on or off the electrical connection between the signal acquisition module and the measurement module The switch module is configured to connect the measurement module to the power output module and the signal acquisition module respectively. When the switch module selects an electrical connection between the power supply output module and the measurement module, the measurement is performed. The module measures a voltage value and a current value of the direct current power supplied by the power output module to the product to be tested; when the switch module selects the communication number to obtain an electrical connection between the module and the measurement module, the signal The module obtains an electrical signal from a part of the circuit of the product to be tested and outputs the electrical signal to the measurement module, and the measurement module measures the corresponding voltage value and current value according to the electrical signal; the measurement module determines the voltage value And the current value is provided to the display module for display. The power supply device of claim 1, wherein the switch module comprises a voltage gating unit, a current gating unit and a control unit, wherein the control unit controls the voltage gating unit, the current gating unit selects the The power output module, the signal acquisition module and the measurement module are connected; the voltage gating unit is used Providing the electrical signal provided by the power output module and the signal signal provided by the signal obtaining module to the measuring module, the measuring module measuring the corresponding voltage value according to the received electrical signal; the current gating unit is used The electrical signal provided by the power output module and the electrical signal provided by the signal obtaining module are provided to the measuring module, and the measuring module measures the corresponding current value according to the received electrical signal. The power supply device of claim 1, wherein the switch module comprises a double pole double throw relay and a push button switch, wherein the push button switch controls the double pole double throw relay to select the power output module, the signal obtaining module Connected to the measurement module. The power supply device of claim 3, wherein the double-pole double-throw relay comprises a double-pole switch and a coil, one end of the coil is connected to the DC power source, and the other end is connected to one end of the button switch, the button The other end of the switch is grounded; one end of the double-pole switch is overlapped with the power output module, and the other end is connected to the measuring module, so that the measuring module measures the direct current supplied by the power output module to the product to be tested. The voltage value and the current value; when the button switch is pressed, the double-knife switch is separated from the power output module, and is overlapped with the signal obtaining module, so that the measuring module obtains the module according to the signal. The electrical signal measures the corresponding voltage value and current value.