KR20080060790A - Power supply - Google Patents

Abstract

A power supply is provided to supply power for testing a sample and reuse the supplied power by using a flywheel diode. A power supply includes an insulating transformer(10), an inverter(30), first and second converters(50,70), and a control unit(90). The insulating transformer transforms input power to remove an electric shock factor by electrically insulating from power receiving equipment(20) and determines the maximum voltage to apply an output voltage to a sample according to selection of an input voltage. The inverter varies the output voltage of the insulating transformer to apply the varied output voltage to the sample. The first and second converters are connected to an output of the inverter in parallel and supply a direction current to the sample. The control unit is connected to the inverter and the first and second converters and controls a voltage of the inverter by measuring voltages and currents of the first and second converters.

Description

Power supply unit {POWER SUPPLY}

1 is a block diagram of a conventional automatic measurement test method and apparatus.

2 is a block diagram of a power supply according to an embodiment of the present invention.

3 is a circuit diagram showing the main part of FIG.

<Description of Signs of Major Parts of Drawings>

10: insulation transformer

20: Faucet

30: inverter

50: 1 converter

70: 2 converter

90: control unit

The present invention relates to a power supply.

Today's automobiles are recognized as a representative civilization in the industrial world because of their advanced technology and the addition of more comfortable and highly precise devices, which improve their maneuverability and usability.

Such a vehicle is composed of a plurality of parts. When these parts are produced, they must be tested and determined to be good before they can be used as parts of a car.

As described above, when a state or value such as power consumption, withstand voltage, insulation resistance, starting, etc. is measured on a measurement object (a device set, an electronic device assembly, etc.) of a conventional product, an operator is required to fit each measurement function. After measuring by using a measuring instrument, good and bad products have been selected according to the condition or value.

Accordingly, since the operator directly selects the time, there is a problem in that the measurement difference is severe according to the measurer or the working condition and the state, so that accurate and accurate determination cannot be made.

The prior art proposed to solve the above problems is as follows.

Prior art related to the present invention is disclosed in the Republic of Korea Patent Publication No. 1989-0004372 (published: June 29, 1988) "automatic measurement test method and apparatus".

1 is a block diagram of a conventional automatic measurement test method and apparatus.

According to FIG. 1, a measurement object including a current and voltage measuring device 5 and a withstand voltage and insulation resistance measuring device 6 for measuring start-up and power consumption of a product, power resistance, and insulation resistance by receiving power from the power supply unit 1. In the system for determining whether the SM is defective, the first and second voltage adjusting units 2 and 3 for adjusting the power received from the power supply unit 1 to different voltage values, and the power supply unit 1 ) And the first and second power adjusting units 2 and 3 receive the adjustment power and apply power to the measurement object SM by the measurement mode control signal of the measurement difference to withstand the voltage and insulation of the current and voltage measuring instrument 5. The control circuit unit 4 controls to measure the power consumption, withstand voltage, insulation resistance and starting power from the resistance measuring instrument 6, and is output from the current and voltage measuring instrument 5 and the withstand voltage and insulation resistance measuring instrument. Converts measured analog values to digital values Conversion to the input / output port function and input and output port function so as to input the check signal of the measurement function according to the control of the control circuit section 4, the measurement data input from the conversion and the port unit 7, detection and control By inputting signals and comparing and judging with the standard limit data according to the program, the judgment according to good and defective goods is automatically performed, and also displayed by buzzer, and the test results are recorded on the display and disk and automatically counted and inspected by simple operation of the operator. It consists of the computer 8 which can do it.

However, the prior art measures power consumption, withstand voltage, insulation resistance, and starting power when testing a component. Since the power supply and the load are used, the current used for the test is consumed, and a large amount of power is consumed during the test. There were becoming structural issues.

The present invention has been made to solve the above problems, an object of the present invention is to provide a power supply for supplying power for testing a test sample, recovering the power tested in the test sample and reuse. There is.

In order to achieve the above object, the present invention transforms an input power source to electrically insulate the power receiving equipment to remove an electric shock element, and determines the maximum voltage that can be applied to the test sample according to the selection of the input voltage. An isolation transformer; An inverter for varying an output voltage of the insulation transformer and applying it to a test sample; 1 and 2 converters connected in parallel to the output of the inverter and supplying direct current to the test sample; And a controller connected to the inverter, the first converter, and the second converter to measure voltage and current information of the first and second converters to control the voltage of the inverter.

The first converter and the second converter are selectively both powered or characterized in that any one can be a load.

Each of the first converter and the second converter includes a switch unit for determining a power supply function performance and a load function performance; A boost unit for supplying alternating current electricity when the switch units are turned on; Each flywheel diode is connected in parallel to the output terminal of the boost portion.

The flywheel diodes are divided into a diode side and a TR side, respectively.

The control unit includes a current control unit which turns on by applying a driving voltage to the first converter and the second converter, and checks the output side voltage of the first converter and the second converter; And a voltage controller configured to adjust a voltage level of the inverter to supply as much current as necessary to the first and second converters based on the current value checked by the current controller.

Here, the test sample of the present invention refers to the parts used in the vehicle. These components are wires, fuses, power dividers, TRs, relays, and switch components.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

Figure 2 is a block diagram of a power supply according to an embodiment of the present invention.

As shown in FIG. 2, the present invention transforms an input power source to electrically insulate the power receiving facility 20 to remove an electric shock element, and according to a selection of an input voltage, the maximum voltage that can apply an output voltage to a test sample. An isolation transformer 10 for determining a value; An inverter (30) for varying the output voltage of the insulation transformer (10) and applying it to a test sample; 1 and 50 converters connected in parallel to the output of the inverter 30 to supply direct current to the test sample; It is connected to the inverter 30, the first converter 50 and the second converter 70 to measure the voltage and current information of the first converter 50 and the second converter 70 to control the voltage of the inverter 30 It is configured to include a control unit 90.

Here, the insulation transformer 10 lowers or boosts the applied voltage to the voltage required for the test sample.

The first converter 50 and the second converter 70 may both be selectively powered, or any one may be a load.

The controller 90 turns on by applying a driving voltage to the first converter 50 and the second converter 70, and checks the output side voltages of the first and second converters 50 and 70. Wow; The voltage controller 93 adjusts the voltage level of the inverter 30 to supply as much current as necessary to the first converter 50 and the second converter 70 based on the current value checked by the current controller 91. It is configured to include.

Here, the control unit 90 adjusts the voltage level of the inverter 30, checks the voltage of the output side of the first converter 50 and the second converter 70, and the drive signal to the one converter 50 and the second converter 70. It is desirable to use a PC with a program to adjust it.

3 is a circuit diagram illustrating the main part of FIG. 2.

As shown in FIG. 3, the first converter 50 and the second converter 70 each have switch portions 51 and 71 for determining the power supply function performance and the load function performance, respectively; Respective boosting units (53) (73) for supplying alternating current electricity during the on operation of the switch sections (51) (71); The flywheel diodes 55 and 75 are connected in parallel to the output terminals of the boosters 53 and 73.

The flywheel diodes 55 and 75 are divided into a diode side and a TR side, respectively.

Here, the diode side passes only the direct current at the alternating current, and the TR side is turned on when a drive signal from the controller 90 is applied.

Hereinafter, an operation description of the present invention according to an embodiment is as follows.

As shown in FIG. 3, first, when the switch unit 51 of the first converter 50 is turned on, the first converter 50 becomes a power supply, and when the switch unit 71 of the second converter 70 is turned off, the second converter ( 70 is a load.

At this time, the current supplied from the one converter 50 to the test sample is used again to return to the second converter 70, and the returned current and the current supplied from the inverter 30 together are input terminals of the one converter 50. Supplied by. In other words, the current returned to the two converter 70 may be supplied to the input terminal of the one converter 50 through the TR side of the flywheel diode 75 because the switch unit 71 is turned off.

That is, when 12 V of current is supplied from the one converter 50 to the test sample, the current of about 7 V passed through the test sample is returned to the two converter 70. Then, the voltage controller 93 checks the voltage at the shaft end of the one converter 50 and the voltage returned to the two converter 70. The current controller 91 adjusts the voltage of the inverter 30 to 5V based on the voltage value measured by the voltage controller 93. Then, the current of 7 V returned to the two converter 70 and the current of 5 V of the inverter 30 are provided to the one converter 50.

Therefore, since the current of 7V is recovered and supplied again, the inverter 30 only needs to supply the current of 5V. Therefore, the present invention can reduce the amount of current used in the test sample.

The operations of the one converter 50 and the two converter 70 can be used interchangeably depending on the type of component.

On the other hand, depending on the type of parts, both the converter 50 and the two converter 70 may be used as a power source. That is, when the voltage is increased on one side and the voltage on the other side of the one converter 50 and the second converter 70 is low, the voltage flows from the high place to the low side, so that the component can be tested using the voltage difference.

Although the preferred embodiments of the present invention have been described in detail above, those of ordinary skill in the art to which the present invention pertains may implement the present invention by various modifications or design changes without departing from the scope of the claims. In case it is regarded as the scope of the present invention.

According to the present invention, there is an advantage that the power supply for testing the test sample can be supplied, and the power supplied using the flywheel diode can be recovered and reused.

Claims (5)

An insulation transformer 10 which is electrically insulated from the power receiving equipment 20 to transform the input power to remove the electric shock element, and determines the maximum voltage that can be applied to the test sample according to the selection of the input voltage; An inverter (30) for varying the output voltage of the insulation transformer (10) and applying it to a test sample; 1 and 50 converters connected in parallel to the output of the inverter 30 to supply direct current to the test sample; It is connected to the inverter 30, the first converter 50 and the second converter 70 to measure the voltage and current information of the first converter 50 and the second converter 70 to control the voltage of the inverter 30 Power supply comprising a control unit (90). According to claim 1, wherein the first converter (50) and the second converter (70) is selectively all of the power supply, characterized in that any one can be a load. [2] The apparatus of claim 1, wherein the first and second converters 70 respectively include switch units 51 and 71 for determining power supply function performance and load function performance, respectively; Respective boosting units (53) (73) for supplying alternating current electricity during the on operation of the switch sections (51) (71); And a flywheel diode (55) (75) connected in parallel to the output of the booster (53) (73). 4. Power supply according to claim 3, characterized in that the flywheel diodes (55) are divided into diode side and TR side, respectively. The controller 90 of claim 1, wherein the controller 90 turns on by applying a driving voltage to the first converter 50 and the second converter 70, and checks output voltages of the first converter 50 and the second converter 70. A current control unit 91; The voltage controller 93 adjusts the voltage level of the inverter 30 to supply as much current as necessary to the first converter 50 and the second converter 70 based on the current value checked by the current controller 91. Power supply comprising a.

Images