KR20120125924A - Energy Effective Power Supply Apparatus and Power Control Method Thereof - Google Patents

Abstract

PURPOSE: An energy reduction type power supplying device and a power controlling method are provided to revive energy generated in an energy revival type electronic load to a power supplying device of a tested device, thereby reducing the energy. CONSTITUTION: A first power supplying device(120) applies first electricity to a second power supplying device. The first power supplying device supplies the first electricity adding commercial electricity applied in revival electricity to the second power supplying device. A revival loading unit(130) receives second electricity outputted from the second power supplying device. The revival loading unit supplies the revival electricity to the first power supplying device. A first rectifier(122) converts first AC electricity into first DC electricity and delivers the same. [Reference numerals] (110) Energy-saving power supply device; (120) First power supplying device; (122) First rectifier; (124) First inverter; (130) Second power supplying device; (132) Second rectifier; (134) Second inverter; (140) Revival loading unit; (142) Third rectifier; (144) Transformer

Description

Energy-saving power supply and its power control method {Energy Effective Power Supply Apparatus and Power Control Method Thereof}

One embodiment of the present invention relates to an energy-saving power supply and its power control method. More specifically, in order to test run the power supply of the device under test, the energy-saving power supply implements the load function and simultaneously regenerates the energy from the energy regenerative electronic load into the power supply of the device under test. The present invention relates to an energy-saving power supply device capable of saving energy and a power control method thereof.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

In general, power supplies designed to supply electrical energy to other systems will be put into production after commissioning. The test run of such a power supply requires a commercial power supply to test for variations in input power and a test load to test for variations in load. Although a simple resistive load is used for such a load, it is inconvenient to use because the output cannot be changed in various ways, and the energy output from the AC power supply is all wasted from the resistor to heat, which causes a great waste of energy.

Meanwhile, when the electronic load is used, various functions such as a constant power load that maintains a constant output power and a constant resistance load that maintains a constant output resistance can be used. However, most electronic loads use a converter to enable the above-described functions, and then consume the energy through semiconductor devices or resistors. In the case of the resistive load or the electronic load, when the output of the AC power supply is not large, energy loss caused by consuming output energy is not a big problem. However, when the output of the AC power supply to be tested is large, there is a disadvantage in that the input power of the commercial power line supplied from the power company is designed to be large, and there is a great difficulty in cooling the load.

In order to solve the above-mentioned problems, an embodiment of the present invention implements the function of the load in another commercial AC power supply that supplies power when the AC power supply is trial run and at the same time comes from the energy regenerative electronic load. The main object of the present invention is to provide an energy-saving power supply device and a method of controlling power thereof, which can save energy by regenerating energy to a power supply device of a device under test.

In order to achieve the above object, an embodiment of the present invention, a first power supply for applying a first power to the second power supply; And a regenerative load unit configured to receive the second power output from the second power supply device and to supply the regenerative power of which the size of the second power is adjusted according to the first power supply device to the first power supply device. However, the first power supply device provides the energy-saving power supply device, characterized in that for supplying the first power added to the commercial power applied to the regenerative power to the second power supply device.

In addition, according to another object of the present invention, the step of applying the first power from the first power supply to the second power supply; Outputting a second power at the second power supply; Receiving a second power output from the second power supply device in a regenerative load unit and then supplying regenerative power to which the size of the second power is adjusted according to the first power supply device to the first power supply device; ; And supplying the first power to the second power supply by adding the commercial power applied to the regenerative power in the first power supply.

As described above, according to one embodiment of the present invention, in order to test run the power supply of the apparatus under test, the energy-saving power supply implements the load function and simultaneously avoids energy from the energy regeneration type electronic load. It is effective to save energy by regenerating with the power supply of the test apparatus.

In addition, according to an embodiment of the present invention, in the case of using the AC power supply, the power equipment supplied from the commercial power line by regenerating the energy consumed by the load when the test operation of the AC power supply to the power supply stage, Since the capacity of the can be reduced, as a result, the energy can be saved. In addition, in general, energy to be consumed at the load is usually released as heat, so cooling equipment according to it is required, while in the present invention, there is an effect of reducing the cooling equipment for cooling the load. In particular, the effect is maximized when testing large capacity AC power supplies.

In addition, when an embodiment of the present invention is extended and applied, it can be applied to various AC output power supply devices. In particular, there is an effect that can be applied to large-capacity high frequency induction heating power supply, UPS (Uninterruptible Power Supply), induction motor speed control inverter, etc., which has been difficult to continuously test in the past.

1 is a block diagram schematically illustrating an energy saving power supply device and a second power supply device according to an embodiment of the present invention;
2 is a flowchart illustrating a power control method of an energy-saving power supply apparatus according to an embodiment of the present invention;
3 is an exemplary view of applying an energy-saving power supply device according to an embodiment of the present invention to an induction heating power supply device,
4 is an exemplary diagram of applying an energy-saving power supply device according to an embodiment of the present invention to an inverter for controlling induction motor speed.

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

Prior to describing an embodiment according to the present invention, the first power, the second power, and the regenerative power described in the present invention are defined, wherein the first power is supplied by the first power supply 120 to the second power supply. Refers to the power supplied to the 140, the second power refers to the power output from the second power supply unit 140, the regenerative power is supplied to the first power supply unit 120 from the regenerative load unit 130 Says power.

1 is a block diagram schematically illustrating an energy saving power supply device and a second power supply device according to an embodiment of the present invention.

Energy-saving power supply device 110 according to an embodiment of the present invention includes a first power supply device 120 and the regenerative load unit 130, the second power supply device 140 is a second rectifier ( 142 and a second inverter 144. In an embodiment of the present invention, the energy saving power supply device 110 includes a first power supply device 120 and a regenerative load unit 130, and the second power supply device 140 includes a second rectifier 142. ) And only the second inverter 144, but this is merely illustrative of the technical idea of one embodiment of the present invention, those skilled in the art to which one embodiment of the present invention belongs. If it does not deviate from the essential characteristics of one embodiment of the present invention will be applicable to various modifications and variations to the components included in the energy-saving power supply 110 or the second power supply (140).

The first power supply device 120 refers to a power supply device that applies the first power to the second power supply device 140. Here, to describe the general operation of the first power supply device 120, the first power supply device 120 receives the power used from a power company or a generator, the first power supply device 120 The first current generated through the first rectifier 122 and the first inverter 124 is supplied to the second power supply device 140. That is, the first power supply 120 is preferably a low power power supply to receive commercial power. In addition, the first power supply device 120 receives commercial AC power from a power company or a generator, and supplies the first power to the second power supply device using a soft start.

Referring to the operation of the first power supply device 120 according to an embodiment of the present invention, the first power supply device 120 is the first power supply to add the commercial power to the regenerative power applied from the regenerative load unit 130 The first power is supplied to the second power supply device 140. That is, the first power supply 120 according to the embodiment of the present invention includes a first rectifier 122 and a first inverter 124. The first rectifier 122 converts the first alternating current (DC) power, which is the applied commercial power, into the first direct current (AC) power, and transmits the converted first direct current (AC) power to the first inverter 124. Here, the first rectifier 122 receives the first AC power, which is commercial (AC) power, from a power company or a generator, and converts the first AC power into the first DC power. The first rectifier 122 may include at least one of a rectifier diode and a silicon controlled rectifier (SCR). The first inverter 124 receives the first DC power from the first rectifier 122 and receives the regenerative power from the regenerative load unit 130, and then converts the first DC power and the regenerative power into the first AC power as the first power. The power is converted into power and supplied to the second power supply 140. Meanwhile, to describe in detail the first inverter 124 included in the first power supply device 120, the first inverter 124 may be configured based on a control unit and a control signal for outputting a control signal for driving the inverter. A gate driver that outputs a switching signal, and converts the first DC power and the regenerative power into the second AC power while selectively turning on or turning off a plurality of switching elements based on the switching signal. It may include a switching unit for outputting. Meanwhile, to describe the switching element included in the switching unit, the switching element included in the switching unit may be preferably an IGBT, but is not necessarily limited thereto. That is, one of ordinary skill in the art to which the present invention pertains may be applied by modifying and modifying various devices without using IGBT as a switching device without departing from the essential characteristics of the present invention. Here, IGBT is easy and simple to drive due to high input impedance, and has advantages of MOSFET (Metal Oxide Film Field Effect Transistor) which can operate at high speed because there is no minority carrier accumulation, and transistor can be manufactured easily and cheaply even at high voltage and high current. The switching element combines the advantages of.

The regenerative load unit 130 receives the second power output from the second power supply device 140, and then supplies regenerative power in which the size of the second power is adjusted according to the first power supply device 120. To the device 120. In addition, the regenerative load unit 130 is electrically insulated from the first power supply device 120. Here, the regenerative load unit 130 may perform a function as an electronic load by adjusting the winding ratio of the transformer 132 or controlling the third rectifier 134. The regenerative load unit 130 according to the embodiment of the present invention includes a third rectifier 134 and a transformer 132. The transformer 132 is a device that increases or decreases AC power by using electromagnetic interaction, and adjusts the third AC power output from the second inverter 144 to a predetermined turns ratio, and the fourth AC power adjusted by the turns ratio. To pass. On the other hand, it is preferable that the transformer 132 is an insulated transformer, but the description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains are essential characteristics of the present invention. If the output of the second power supply device 140, which is the device under test, is electrically insulated from the input terminal within a range of not exceeding, it is not necessary to implement the transformer 132 as an insulated transformer, and omits the transformer 132. Will be changed and applicable. The third rectifier 134 receives the fourth alternating current power from the transformer 132 and converts the fourth alternating current into fourth regenerative power, which is regenerative power, and transmits the fourth alternating current to the first power supply device 120.

The second power supply device 140 is preferably a high power power supply which is a device under test. The second power supply 140 includes at least one of an induction heating power supply and an induction motor speed control inverter. The second power supply 140 includes a second rectifier 142 and a second inverter 144. The second rectifier 142 converts the second AC power applied from the first inverter 124 to the second DC power and transfers the second DC power to the second inverter 144. The second inverter 144 receives the second DC power from the second rectifier 142 and converts the second DC power into third AC power, which is the second power, and outputs the second AC power.

In addition, the energy efficiency of the energy-saving power supply unit 110 and the second power supply unit 140 is the efficiency of the second power supply unit 140, the efficiency of the regenerative load unit 130 and the first power supply unit Is determined according to the efficiency of 120. Here, a method of multiplying respective efficiencies of the second power supply device 140, the regenerative load unit 130, and the first power supply device 120 may be calculated.

2 is a flowchart illustrating a power control method of an energy-saving power supply apparatus according to an embodiment of the present invention.

The first power supply device 120 applies the first power to the second power supply device 140 (S210). In operation S210, the first power supply device 120 is a low power power supply device that receives commercial power, and the first power supply device 120 receives commercial AC power from a power company or a generator. Here, the first power supply device 120 may supply the first power to the second power supply device using a soft start.

On the other hand, in more detail with respect to step S210, the first power supply device 120 includes a first rectifier 122 and the first inverter 124, the first rectifier 122 is an applied commercial power The first AC power is converted into first DC power and transferred to the first inverter 124. That is, the first rectifier 122 receives first AC power, which is commercial AC power, from a power company or a generator, and converts the first AC power to the first DC power. The first rectifier 122 includes at least one of a rectifier diode and an SCR. The first inverter 124 receives the first DC power from the first rectifier 122 and receives the regenerative power from the regenerative load unit 130, and then converts the first DC power and the regenerative power into the first AC power as the first power. The power is converted into power and supplied to the second power supply 140.

The second power supply device 140 outputs the second power after receiving the first power from the first power supply device 120 (S220). In operation S220, the second power supply device 140 is a high power power supply which is a device under test, and the second power supply device 140 includes at least one of an induction heating power supply device and an induction motor speed control inverter. That is, the step S220 will be described in more detail. The second power supply device 140 includes a second rectifier 142 and a second inverter 144, and the second rectifier 142 includes a first power supply device ( The second AC power applied from the first inverter 124 of 120 is converted into second DC power and transferred to the second inverter 144. The second inverter 144 receives the second DC power from the second rectifier 142 and converts the second DC power into third AC power, which is the second power, and outputs the second AC power.

The regenerative load unit 130 receives the second power output from the second power supply device 140, and then supplies regenerative power in which the size of the second power is adjusted according to the first power supply device 120. Supply to the device 120 (S230). Here, the regenerative load unit 130 is electrically insulated from the first power supply device 120. On the other hand, to be described in more detail with respect to step S230, the regenerative load unit 130 includes a third rectifier 134 and a transformer 132, the transformer 132 included in the regenerative load unit 130 is electronic mutual An apparatus for raising or lowering AC power by using an induction action. The third AC power output by the second inverter 144 is adjusted to a predetermined turns ratio, and the fourth AC power adjusted by the turns ratio is transmitted. The third rectifier 134 included in the regenerative load unit 130 receives the fourth alternating current power from the transformer 132, converts the fourth alternating current into fourth regenerative power, which is regenerative power, and transmits the fourth alternating current to the first power supply 120.

The first power supply device 120 supplies the first power to which the commercial power is added to the regenerative power applied through the regenerative load unit 130 to the second power supply device 140 (S240). That is, the first power supply device 120 may supply the regenerative power through the regenerative load unit 130 of the first power to be supplied to the second power supply device 140 to supply the second power supply device 140. Only the power used except the regenerative power of the first power is added and supplied, thereby reducing the power applied to the second power supply. In more detail, the first power supply device 120 regenerates energy consumed from a load when the second power supply device 140 is operated in a test operation, and then regenerates the power supply, thereby supplying the power from a commercial power line. The capacity of the power supply can be reduced, resulting in energy savings.

That is, the energy saving type power supply device 110 including the first power supply device 120 and the regenerative load unit 130 may be applied to the second power supply device 140 that supplies various AC power. For example, the energy-saving power supply device for the second power supply 140 including a large-capacity high frequency induction heating power supply, a UPS (Uninterruptible Power Supply), an induction motor speed control inverter, and the like, which have been difficult to continuously test in the past. By applying the 110, the first power supply 120 can be tested and can save energy.

In FIG. 2, steps S210 to S240 are described as being sequentially executed. However, this is merely illustrative of the technical idea of an embodiment of the present invention, and the general knowledge in the technical field to which an embodiment of the present invention belongs. Those having a variety of modifications and variations may be applicable by changing the order described in FIG. 2 or executing one or more steps of steps S210 to S240 in parallel without departing from the essential characteristics of one embodiment of the present invention. 2 is not limited to the time series order.

As described above, the power control method of the energy-saving power supply apparatus according to the embodiment of the present invention described in FIG. 2 may be implemented in a program and recorded in a computer-readable recording medium. A computer-readable recording medium for recording a program for implementing a power control method of an energy-saving power supply device according to an embodiment of the present invention is any kind of recording device that stores data that can be read by a computer system. It includes. Examples of such computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and also implemented in the form of a carrier wave (e.g., transmission over the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code is stored and executed in a distributed manner. In addition, functional programs, code, and code segments for implementing an embodiment of the present invention may be easily inferred by programmers skilled in the art to which an embodiment of the present invention belongs.

3 is an exemplary view of applying an energy-saving power supply device according to an embodiment of the present invention to an induction heating power supply device.

As shown in FIG. 3, the energy saving power supply device 110 including the first power supply device 120 and the regenerative load unit 130 is connected to the second power supply device 140 including the induction heating power supply device. Can be applied. As shown in FIG. 3, the first rectifier 122 at the input of the energy saving power supply 110 may be replaced with an SCR or a diode, and the switching element IGBT included in the first inverter 124 may be used. However, this is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention belongs without departing from the essential characteristics of the present invention and the rectifier 122 The elements included in the first inverter 124 may be modified and modified in various ways.

That is, referring to FIG. 3 in more detail, when the second power supply device 140 is an induction heating power supply device, the transformer 132 in the regenerative load unit 130 connected to the induction heating power supply device is an induction heating power supply. The third AC power output from the inverter included in the device is adjusted to a predetermined turns ratio, and the fourth AC power, which is the AC power adjusted by the turns ratio, is transferred to the third rectifier 134 in the regenerative load unit 130. do. That is, the third rectifier 134 in the regenerative load unit 130 converts the regenerative power from the fourth AC power received through the transformer 132 to supply the first power supply device 120. The first power supply device 120 supplies the first power, in which commercial power is added to the regenerative power applied through the regenerative load unit 130, to the second power supply device 140. That is, the first power supply device 120 may supply the regenerative power through the regenerative load unit 130 of the first power to be supplied to the second power supply device 140 to supply the second power supply device 140. Only the power used except the regenerative power of the first power is added and supplied, thereby reducing the power applied to the second power supply. That is, the first power supply unit 120 regenerates energy consumed by the load when the second power supply unit 140 is tested and regenerates to the power supply terminal, thereby increasing the capacity of the power supply unit supplied from the commercial power line. As a result, energy can be saved.

4 is an exemplary diagram of applying an energy-saving power supply device according to an embodiment of the present invention to an inverter for controlling induction motor speed.

As shown in FIG. 4, the energy saving power supply device 110 may be applied to an inverter for speed control of an induction motor. As shown in FIG. 4, the energy saving power supply device 110 including the first power supply device 120 and the regenerative load unit 130 includes a second power supply device 140 including an inverter for speed control of an induction motor. Can be applied to As shown in FIG. 4, the first rectifier 122 at the input of the energy saving power supply 110 may be replaced with an SCR or a diode, and the switching element IGBT included in the first inverter 124 may be used. However, this is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention belongs without departing from the essential characteristics of the present invention and the rectifier 122 The elements included in the first inverter 124 may be modified and modified in various ways.

That is, to describe in more detail with respect to Figure 4, when the second power supply device 140 includes an inverter for controlling the induction motor speed, the transformer 132 in the regenerative load unit 130 connected to the induction heating power supply device is The third AC power, which is the AC power output by the inverter included in the induction heating power supply device, is adjusted to the preset winding ratio, and the third rectifier 134 in the regenerative load unit 130 adjusts the fourth AC power, which is the AC power adjusted by the winding ratio. To pass). That is, the third rectifier 134 in the regenerative load unit 130 converts the regenerative power from the fourth AC power received through the transformer 132 to supply the first power supply device 120. The first power supply device 120 supplies the first power, in which commercial power is added to the regenerative power applied through the regenerative load unit 130, to the second power supply device 140. That is, the first power supply device 120 may supply the regenerative power through the regenerative load unit 130 of the first power to be supplied to the second power supply device 140 to supply the second power supply device 140. Only the power used except the regenerative power of the first power is added and supplied, thereby reducing the power applied to the second power supply. That is, the first power supply unit 120 regenerates energy consumed by the load when the second power supply unit 140 is tested and regenerates to the power supply terminal, thereby increasing the capacity of the power supply unit supplied from the commercial power line. As a result, energy can be saved.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

110: energy saving power supply 120: first power supply
122: first rectifier 124: first inverter
130: regenerative load section 132: third rectifier
134: transformer 140: second power supply
142: second rectifier 144: second inverter

Claims (12)

A first power supply for applying a first power to the second power supply; And
A regenerative load unit configured to receive the second power output from the second power supply device and to supply the regenerative power of which the size of the second power is adjusted according to the first power supply device to the first power supply device;
Including, The first power supply is an energy-saving power supply, characterized in that for supplying the first power added to the commercial power applied to the regenerative power to the second power supply. The method of claim 1,
The first power supply device,
A first rectifier for converting the first AC power, which is the applied commercial power, into first DC power, and transferring the first rectifier power; And
After receiving the first DC power from the first rectifier and the regenerative power from the regenerative load unit, the first DC power and the regenerative power are converted into the second AC power which is the first electric power. 2 First Inverter Supplying Power Supply
Energy-saving power supply, characterized in that it comprises a. The method of claim 2,
The first rectifier,
Energy saving power supply comprising at least one of a rectifier diode (Silicon Diode) and a silicon controlled rectifier (SCR). The method of claim 2,
The first inverter,
A control unit for outputting a control signal for driving an inverter;
A gate driver outputting a switching signal based on the control signal; And
The first DC power and the regenerative power are converted into the second AC power to be output while selectively turning-on or turning-off the plurality of switching devices based on the switching signal. Switching unit
Energy-saving power supply, characterized in that it comprises a. The method of claim 2,
The second power supply device,
A second rectifier converting the second AC power applied from the first inverter into the second DC power and transmitting the second rectifier power; And
A second inverter receiving the second DC power from the second rectifier and converting the second DC power into a third AC power that is the second power
Energy-saving power supply, characterized in that it comprises a. The method of claim 5, wherein
The regenerative load unit,
A transformer configured to adjust the third AC power output by the second inverter to a predetermined turns ratio and to transmit a fourth AC power adjusted to the turns ratio; And
A third rectifier receiving the fourth alternating current power from the transformer and converting the fourth alternating current power into fourth regenerative power that is the regenerative power and transmitting the fourth alternating current to the first power supply device;
Energy-saving power supply, characterized in that it comprises a. The method of claim 1,
The regenerative load unit,
An energy saving power supply device, characterized in that the first power supply is electrically insulated. The method of claim 1,
The second power supply device,
An energy saving power supply comprising at least one of an induction heating power supply and an induction motor speed control inverter. The method of claim 1,
The first power supply device,
Energy-saving power supply, characterized in that the low-power power supply receiving commercial power. The method of claim 1,
The second power supply device,
An energy-saving power supply, characterized in that a high-power power supply being a device under test. The method of claim 1,
The first power supply device,
Energy-saving power supply, characterized in that for supplying the first power to the second power supply using a soft start (Soft Start). Applying first power from the first power supply to the second power supply;
Outputting a second power at the second power supply;
Receiving a second power output from the second power supply device in a regenerative load unit and then supplying regenerative power to which the size of the second power is adjusted according to the first power supply device to the first power supply device; ; And
Supplying the first power to the second power supply by adding commercial power applied to the regenerative power in the first power supply;
Power control method comprising a.

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