KR20220091285A - Active current compensation device including integrated circuit unit and non-integrated circuit unit - Google Patents

Abstract

The present invention provides an active current compensating device for actively compensating noise generated in a common mode in each of at least two or more high current paths, comprising: at least two high current paths for transferring power supplied by a second device to a first device; , a sensing unit generating an output signal corresponding to a common mode noise current on the large current path; an amplifying unit generating an amplified current by amplifying the output signal; and generating a compensation current based on the amplified current, and the compensation and a compensating unit configured to pass a current through each of the at least two or more large current paths, wherein the amplifying unit includes a non-integrated circuit unit and a one-chip integrated circuit unit, and the non-integrated circuit unit includes the first device and the An active current compensating device designed according to a power system of at least one of the second devices, wherein the single-chip integrated circuit unit is independent of the rated power specifications of the first device and the second device.

Description

Active current compensation device including integrated circuit unit and non-integrated circuit unit

Embodiments of the present invention relate to an active current compensation device including an integrated circuit part and a non-integrated circuit part, and to an active current compensation device for actively compensating noise input in a common mode on two or more large current paths connected to a power system. it's about

BACKGROUND ART In general, electrical devices such as household appliances, industrial electrical appliances and electric vehicles emit noise during operation. For example, noise may be emitted through a power line due to a switching operation of a power conversion device in an electronic device. If such noise is left unattended, it is not only harmful to the human body, but also causes malfunctions or malfunctions in surrounding parts and other electronic devices. As such, the electromagnetic interference that an electronic device exerts on other devices is called electromagnetic interference (EMI), and among them, noise transmitted through wires and substrate wiring is called conducted emission (CE) noise.

In order to operate electronic devices without causing malfunctions in peripheral components and other devices, the amount of EMI noise emission from all electronic products is strictly regulated. Therefore, most electronic products necessarily include a noise reduction device (eg, an EMI filter) for reducing EMI noise current in order to satisfy the regulation on the amount of noise emission. For example, in white home appliances such as air conditioners, electric vehicles, aviation, energy storage systems (ESSs), and the like, EMI filters are essentially included. A conventional EMI filter uses a common mode choke (CM choke) to reduce common mode (CM) noise among conducted emission (CE) noise. A common mode (CM) choke is a passive filter that 'suppresses' common mode noise currents.

Meanwhile, in order to maintain the noise reduction performance of the passive EMI filter in a high-power system, the size or number of common mode chokes should be increased. Therefore, in high-power products, the size and price of passive EMI filters are greatly increased.

In order to overcome the limitations of the passive EMI filter as described above, interest in an active EMI filter has emerged. The active EMI filter may remove EMI noise by detecting EMI noise and generating a signal to cancel the noise. The active EMI filter includes an active circuit capable of generating an amplified signal from the sensed noise signal.

Meanwhile, in order to actually apply an active EMI filter to electronic products, it is necessary to mass-produce semiconductor devices to meet various demands. If a discrete device (or components) is used to manufacture an active EMI filter for actual use, the number of devices for active circuits increases and various components are required to improve the function of the active EMI filter. Therefore, there is a problem in that the size and cost of the active EMI filter increase in order to achieve a higher function.

Therefore, in order to overcome this problem, there is a need for an active EMI filter using a custom integrated circuit (IC) that can be used in various power systems.

The present invention has been devised to overcome the above problems, and an object of the present invention is to provide an active current compensating device including an integrated circuit unit and a non-integrated circuit unit. The integrated circuit unit may be a single chip including essential components of an active current compensator, and the non-integrated circuit unit may be configured to implement active EMI filters of various designs.

However, these problems are exemplary, and the scope of the present invention is not limited thereto.

According to an embodiment of the present invention, there is provided an active current compensator for actively compensating noise generated in a common mode in each of at least two or more large current paths, at least two devices for transferring power supplied by a second device to a first device over high current paths; a sensing unit generating an output signal corresponding to a common mode noise current on the large current path; an amplifying unit amplifying the output signal to generate an amplified current; and a compensator for generating a compensating current based on the amplified current, and allowing the compensating current to flow through each of the at least two large current paths, wherein the amplifying unit is a non-integrated circuit unit and a one-chip integrated circuit. a circuit part, wherein the non-integrated circuit part is designed according to a power system of at least one of the first device and the second device, and the single-chip integrated circuit part meets the rated power specifications of the first device and the second device. can be irrelevant

According to an embodiment, the non-integrated circuit unit may be designed according to the rated power of the first device.

According to an embodiment, the one-chip integrated circuit unit may include a first transistor, a second transistor, and one or more resistors.

According to an embodiment, the non-integrated circuit unit includes a first impedance Z ₁ connecting emitter node sides of the first transistor and the second transistor and an input terminal of the compensator, the first transistor and the second transistor A second impedance Z ₂ connecting the base node side of the transistor and the input terminal of the compensator may be included.

According to an embodiment, the sensing unit includes a sensing transformer, the compensator includes a compensation transformer, and the value of the first impedance or the value of the second impedance includes a turns ratio of the sensing transformer and the compensation transformer, and It is determined based on the target current gain of the amplifying unit, and the configuration of the single chip integrated circuit unit may be independent of the turns ratio and the target current gain.

According to an embodiment, according to the design of the first impedance and the second impedance, the single-chip integrated circuit unit may be used for the first device of various power systems.

Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

In the active current compensator according to various embodiments of the present invention, as described above, in a high-power system, price, area, volume, weight, and heat generation can be reduced compared to a passive filter composed of a CM choke.

In addition, the size of the active current compensation device according to various embodiments of the present disclosure is minimized compared to a case in which a discrete semiconductor device is included.

In addition, the integrated circuit unit according to various embodiments of the present invention may be universally applied to active current compensating devices of various designs.

In addition, the active current compensator including the integrated circuit unit according to various embodiments of the present invention may be used in various power electronic products regardless of a power rating. Accordingly, the active current compensation device according to various embodiments of the present invention can be expanded to a high-power and high-noise system.

In addition, the active current compensating device including the integrated circuit unit according to various embodiments of the present invention can be easily mass-produced.

In addition, the active current compensation device and/or the one-chip integrated circuit unit according to various embodiments of the present invention may be commercialized as an independent module with versatility.

Of course, the scope of the present invention is not limited by these effects.

1 schematically shows the configuration of a system including an active current compensation device 100 according to an embodiment of the present invention.
FIG. 2 shows a more specific example of the embodiment shown in FIG. 1 , and schematically shows an active current compensating device 100A according to an embodiment of the present invention.
3 shows a more specific example of the embodiment shown in FIG. 2 , and schematically shows an active current compensating device 100A-1 according to an embodiment of the present invention.
4 schematically shows the configuration of an active current compensating device 100A-2 according to another embodiment of the present invention.
5 schematically shows the configuration of an active current compensating device 100A-3 according to another embodiment of the present invention.
6 schematically shows the configuration of an active current compensation device 100B according to another embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when described with reference to the drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted. .

In the following embodiments, terms such as first, second, etc. are used for the purpose of distinguishing one component from another, not in a limiting sense. In the following examples, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the following embodiments, terms such as include or have means that the features or components described in the specification are present, and the possibility that one or more other features or components will be added is not excluded in advance. In the drawings, the size of the components may be exaggerated or reduced for convenience of description. In the following embodiments, when a component, a unit, a unit, a module, etc. are connected, it is not only when the components, parts, units, and modules are directly connected, but also other components in the middle of the components, parts, units, and modules. , parts, units, and modules are interposed and indirectly connected.

1 schematically shows the configuration of a system including an active current compensation device 100 according to an embodiment of the present invention. The active current compensating device 100 includes the first currents I11 and I12 input from the first device 300 through two or more large current paths 111 and 112 in a common mode (CM) (eg, EMI). noise current) can be actively compensated.

Referring to FIG. 1 , the active current compensator 100 may include a sensing unit 120 , an amplifying unit 130 , and a compensating unit 160 .

In this specification, the first device 300 may be various types of power systems using power supplied by the second device 200 . For example, the first device 300 may be a load driven using power supplied by the second device 200 . Also, the first device 300 may be a load (eg, an electric vehicle) that stores energy using power supplied by the second device 200 and is driven using the stored energy. However, the present invention is not limited thereto.

In the present specification, the second device 200 may be a system of various types for supplying power to the first device 300 in the form of current and/or voltage. The second device 200 may be a device for supplying stored energy. However, the present invention is not limited thereto.

A power conversion device may be located on the side of the first device 300 . For example, the first currents I11 and I12 may be input to the current compensation device 100 by the switching operation of the power conversion device. That is, the first device 300 side may correspond to a noise source, and the second device 200 side may correspond to a noise receiver.

The two or more high current paths 111 and 112 may be paths for transmitting power supplied by the second device 200 , that is, the second currents I21 and I22 to the first device 300 , for example, a power line. have. For example, each of the two or more high current paths 111 and 112 may be a live line and a neutral line. At least a portion of the high current paths 111 and 112 may pass through the current compensating device 100 . The second currents I21 and I22 may be alternating currents having a frequency of the second frequency band. The second frequency band may be, for example, a 50Hz to 60Hz band.

Also, the two or more high current paths 111 and 112 may be paths through which noise generated in the first device 300, that is, the first currents I11 and I12, is transmitted to the second device 200 . The first currents I11 and I12 may be input to each of the two or more large current paths 111 and 112 in a common mode. The first currents I11 and I12 may be currents that are unintentionally generated in the first device 300 due to various causes. For example, the first currents I11 and I12 may be noise currents generated by virtual capacitance between the first device 300 and the surrounding environment. Alternatively, the first currents I11 and I12 may be noise currents generated by a switching operation of the power conversion device of the first device 300 . The first currents I11 and I12 may be currents having a frequency of the first frequency band. The first frequency band may be a higher frequency band than the above-described second frequency band. The first frequency band may be, for example, a band of 150KHz to 30MHz.

Meanwhile, the two or more high current paths 111 and 112 may include two paths as shown in FIG. 1 , or may include three paths or four paths as shown in FIGS. 4 and 6 . The number of high current paths 111 and 112 may vary depending on the type and/or type of power used by the first device 300 and/or the second device 200 .

The sensing unit 120 may sense the first currents I11 and I12 on the two or more large current paths 111 and 112 , and generate an output signal corresponding to the first currents I11 and I12 . That is, the sensing unit 120 may mean a means for sensing the first currents I11 and I12 on the large current paths 111 and 112 . At least a portion of the high current paths 111 and 112 may pass through the sensing unit 120 for sensing the first currents I11 and I12, but an output signal is generated by sensing within the sensing unit 120. The portion may be insulated from the high current paths 111 and 112 . For example, the sensing unit 120 may be implemented as a sensing transformer. The sensing transformer may sense the first currents I11 and I12 on the high current paths 111 and 112 while insulated from the high current paths 111 and 112 . However, the sensing unit 120 is not limited to the sensing transformer.

According to an embodiment, the sensing unit 120 may be differentially connected to the input terminal of the amplifying unit 130 .

The amplifying unit 130 may be electrically connected to the sensing unit 120 to amplify the output signal output by the sensing unit 120 to generate an amplified output signal. In the present invention, 'amplification' by the amplification unit 130 may mean adjusting the size and/or phase of the amplification target. The amplifying unit 130 may be implemented by various means, and may include an active element. In an embodiment, the amplifier 130 may include a bipolar junction transistor (BJT). For example, the amplifier 130 may include a plurality of passive elements such as resistors and capacitors in addition to the BJT. However, the present invention is not limited thereto, and the means for 'amplification' described in the present invention may be used without limitation as the amplifying unit 130 of the present invention.

According to an embodiment, the second reference potential 602 of the amplifying unit 130 and the first reference potential 601 of the current compensator 100 may be distinguished from each other. For example, when the amplifying unit 130 is insulated from the large current paths 111 and 112 , the second reference potential 602 of the amplifying unit 130 and the first reference potential 601 of the current compensating device 100 are can be distinguished from each other.

However, the present invention is not limited thereto. For example, when the amplifying unit 130B is not insulated from the large current paths 111 and 112 as shown in FIG. 6 , the reference potential of the amplifying unit 130B and the reference potential of the current compensating device 100B may not be distinguished. have.

The amplifying unit 130 according to various embodiments of the present disclosure may include an integrated circuit unit 131 and a non-integrated circuit unit 132 . The integrated circuit unit 131 may include essential components of the active current compensation device 100 . Essential components may include, for example, active elements. Accordingly, the active element included in the amplifying unit 130 may be integrated in the integrated circuit unit 131 of the amplifying unit 130 . Among the amplifying units 130 , the non-integrated circuit unit 132 may not include an active element. The integrated circuit unit 131 may further include an active element as well as a passive element.

The integrated circuit unit 131 according to an embodiment of the present invention may be physically a single IC chip. The integrated circuit unit 131 according to an embodiment of the present invention may be applied to the active current compensating device 100 of various designs. The one-chip integrated circuit unit 131 according to an embodiment of the present invention has versatility as an independent module and can be applied to the current compensation device 100 of various designs.

The non-integrated circuit unit 132 according to an embodiment of the present invention may be modified according to the design of the active current compensating device 100 .

The integrated circuit unit 131 may include a terminal to be connected to the non-integrated circuit unit 132 . The integrated circuit unit 131 and the non-integrated circuit unit 132 may be coupled together to function as the amplifying unit 130 . The combination of the integrated circuit unit 131 and the non-integrated circuit unit 132 may perform a function of generating an amplified signal from the output signal output from the sensing unit 120 . The amplified signal may be input to the compensation unit 160 .

Examples of the detailed configuration of the amplifying unit 130 including the integrated circuit unit 131 and the non-integrated circuit unit 132 will be described later with reference to FIGS. 3 to 6 .

As described above, the active current compensation apparatus 100 according to various embodiments is characterized in that it is divided into an integrated circuit unit and a non-integrated circuit unit.

The amplification unit 130 may receive power from the power supply device 400 that is differentiated from the first device 300 and/or the second device 200 . The amplifying unit 130 may receive power from the power supply 400 and amplify the output signal output by the sensing unit 120 to generate an amplified current.

The power supply 400 may be a device that receives power from a power source unrelated to the first device 300 and the second device 200 to generate input power for the amplifier 130 . Optionally, the power supply 400 may be a device that receives power from any one of the first device 300 and the second device 200 to generate input power for the amplifier 130 .

The integrated circuit unit 131 which is an IC chip may include a terminal to be connected to the power supply 400 , a terminal to be connected to the second reference potential 602 , and a terminal to be connected to the non-integrated circuit unit 132 .

The compensation unit 160 may generate compensation currents IC1 and IC2 based on the output signal amplified by the amplifier 130 . The output side of the compensator 160 may be connected to the high current paths 111 and 112 to flow the compensation currents IC1 and IC2 to the high current paths 111 and 112 .

According to an exemplary embodiment, the output side of the compensating unit 160 may be insulated from the amplifying unit 130 . For example, the compensating unit 160 may include a compensating transformer for the insulation. For example, the output signal of the amplifier 130 may flow to the primary side of the compensation transformer, and the compensation current based on the output signal may be generated to the secondary side of the compensation transformer.

However, the present invention is not limited thereto. According to another embodiment, as shown in FIG. 6 , the output side of the compensator 160B may be non-insulated from the amplification unit 130B. In this case, the amplifying unit 130B may be non-insulated from the large current paths 111 and 112 .

Referring back to FIG. 1 , the compensating unit 160 converts the compensation currents IC1 and IC2 through the two or more large current paths 111 and 112 respectively to the large current paths 111, 112) can be injected. The compensation currents IC1 and IC2 may have the same magnitude as the first currents I11 and I12 and may have opposite phases.

FIG. 2 shows a more specific example of the embodiment shown in FIG. 1 , and schematically shows an active current compensating device 100A according to an embodiment of the present invention. The active current compensator 100A actively applies the first currents I11 and I12 (eg, noise current) input in a common mode to each of the two large current paths 111 and 112 connected to the first device 300 . can be compensated

Referring to FIG. 2 , the active current compensator 100A may include a sensing transformer 120A, an amplifier 130 , and a compensator 160A.

In an embodiment, the above-described sensing unit 120 may include a sensing transformer 120A. In this case, the sensing transformer 120A may be a means for sensing the first currents I11 and I12 on the large current paths 111 and 112 in a state insulated from the large current paths 111 and 112 . The sensing transformer 120A may sense the first currents I11 and I12 that are noise currents input from the first device 300 side to the large current paths 111 and 112 (eg, a power line).

The sensing transformer 120A may include a primary side 121A disposed on the large current paths 111 and 112 , and a secondary side 122A differentially connected to the input terminal of the amplifier 130 . have. The sensing transformer 120A is configured on the basis of the magnetic flux density induced by the first currents I11 and I12 in the primary side 121A (eg, the primary winding) disposed on the large current paths 111 and 112 . It can create an induced current in the secondary side 122A (eg secondary winding). The primary side 121A of the sensing transformer 120A may be, for example, a winding in which the first large current path 111 and the second large current path 112 are wound on one core, respectively. However, the present invention is not limited thereto, and the primary side 121A of the sensing transformer 120A may have a form in which the first large current path 111 and the second large current path 112 pass through the core.

Specifically, the magnetic flux density induced by the first current I11 on the first high current path 111 (eg, live wire) and the first current I12 on the second high current path 112 (eg, neutral wire) It may be configured such that the magnetic flux densities induced by the are superimposed (or reinforced) with each other. At this time, the second currents I21 and I22 also flow on the high current paths 111 and 112 , the magnetic flux density induced by the second current I21 on the first large current path 111 and the second large current path 112 . ), the magnetic flux density induced by the first current I22 may be configured to cancel each other. Also, for example, the sensing transformer 120A has a magnitude of the magnetic flux density induced by the first currents I11 and I12 of the first frequency band (eg, a band having a range of 150KHz to 30MHz) at the second frequency. It may be configured to be larger than the magnitude of the magnetic flux density induced by the second currents I21 and I22 of the band (eg, a band having a range of 50 Hz to 60 Hz).

As such, the sensing transformer 120A is configured to cancel the magnetic flux densities induced by the second currents I21 and I22, so that only the first currents I11 and I12 are sensed. That is, the current induced in the secondary side 122A of the sensing transformer 120A may be a current in which the first currents I11 and I12 are converted at a certain rate.

For example, in the sensing transformer 120A, the turns ratio of the primary side 121A and the secondary side 122A is 1:N _sen , and the self-inductance of the primary side 121A of the sensing transformer 120A is L Speaking of _sen , the secondary side 122A may have a self-inductance of N _sen ² ·L _sen . At this time, the current induced in the secondary side 122A is 1/N _sen times the first currents I11 and I12. For example, the primary side 121A and the secondary side 122A of the sensing transformer 120A may be coupled by a coupling coefficient of k _sen .

The secondary side 122A of the sensing transformer 120A may be connected to the input terminal of the amplifier 130 . For example, the secondary side 122A of the sensing transformer 120A may be differentially connected to the input terminal of the amplifying unit 130 to supply an induced current or an induced voltage to the amplifying unit 130 .

The amplifying unit 130 may amplify a current or an induced voltage sensed by the sensing transformer 120A and induced in the secondary side 122A. For example, the amplification unit 130 may amplify the magnitude of the induced current or the induced voltage at a certain ratio and/or adjust the phase.

According to various embodiments of the present disclosure, the amplifying unit 130 may include an integrated circuit unit 131 configured of one IC chip and a non-integrated circuit unit 132 configured other than the IC chip.

According to an embodiment, the amplifying unit 130 may be connected to a second reference potential 602 , and the second reference potential 602 is the first reference of the current compensating device 100 (or the compensating unit 160A). It can be distinguished from the potential 601 . The amplifying unit 130 may be connected to the power supply 400 .

The IC chip, which is the integrated circuit unit 131 , may include a terminal for connecting to the power supply 400 , a terminal for connecting to the second reference potential 602 , and a terminal for connecting to the non-integrated circuit unit 132 . .

The compensating unit 160A may be an example of the above-described compensating unit 160 . In an embodiment, the compensating unit 160A may include a compensating transformer 140A and a compensating capacitor unit 150A. The amplified current amplified by the above-described amplifying unit 130 flows to the primary side 141A of the compensation transformer 140A.

The compensation transformer 140A according to an embodiment may be a means for insulating the amplifying unit 130 including the active element from the large current paths 111 and 112 . That is, the compensation transformer 140A generates a compensation current (in the secondary side 142A) for injecting into the high current paths 111 and 112 based on the amplified current in a state insulated from the large current paths 111 and 112 . It may be a means for

The compensation transformer 140A may include a primary side 141A that is differentially connected to the output terminal of the amplifier 130, and a secondary side 142A that is connected to the high current paths 111 and 112. have. The compensating transformer 140A induces a compensating current in the secondary side 142A (eg, the secondary winding) based on the magnetic flux density induced by the amplified current flowing through the primary side 141A (eg, the primary winding). can do.

In this case, the secondary side 142A may be disposed on a path connecting the compensation capacitor unit 150A, which will be described later, and the first reference potential 601 of the current compensation device 100A. That is, one end of the secondary side 142A is connected to the large current paths 111 and 112 through the compensation capacitor unit 150A, and the other end of the secondary side 142A is the first end of the active current compensating device 100A. 1 may be connected to the reference potential 601 . On the other hand, the primary side 141A of the compensation transformer 140A, the amplifier 130, and the secondary side 122A of the sensing transformer 120A are distinguished from the remaining components of the active current compensating device 100A. It may be connected to the second reference potential 602 . The first reference potential 601 of the current compensating device 100A according to an embodiment and the second reference potential 602 of the amplifying unit 130 may be distinguished.

As described above, the current compensating device 100A according to an embodiment uses a different reference potential (ie, the second reference potential 602) from the rest of the components for the components generating the compensation current, and a separate power supply device ( 400), the component generating the compensation current can be operated in an insulated state, thereby improving the reliability of the active current compensation device 100A. However, the active compensation device including the integrated circuit unit 131 and the non-integrated circuit unit 132 according to the present invention is not limited to such an insulating structure. An active current compensating device 100B having a non-insulating structure according to another embodiment of the present invention will be described later with reference to FIG. 6 .

In the compensation transformer 140A according to an embodiment, the turns ratio of the primary side 141A and the secondary side 142A is 1:N _inj , and the self-inductance of the primary side 141A of the compensation transformer 140A is Speaking of L _inj , the secondary side 142A may have a self-inductance of N _inj ² ·L _inj . At this time, the current induced in the secondary side 142A is 1/N _inj times the current flowing in the primary side 141A (ie, amplified current). The primary side 141A and the secondary side 142A of the compensation transformer 140A may be coupled by a coupling coefficient of k _inj .

The current converted through the compensation transformer 140A may be injected as compensation currents IC1 and IC2 into the large current paths 111 and 112 (eg, a power line) through the compensation capacitor unit 150A. Accordingly, the compensation currents IC1 and IC2 may have the same magnitude and opposite phase to the first currents I11 and I12 in order to cancel the first currents I11 and I12. Accordingly, the magnitude of the current gain of the amplifying unit 130 may be designed to be N _sen ·N _inj .

As described above, the compensation capacitor unit 150A may provide a path through which the current generated by the compensation transformer 140A flows to each of the two large current paths 111 and 112 .

Compensation capacitor unit 150A, one end is connected to the secondary side (142A) of the compensation transformer (140A), the other end is connected to the large current path (111, 112) two Y-capacitor (Y-capacitor, Y-cap) may be included. One end of each of the two Y-caps shares a node connected to the secondary side 142A of the compensation transformer 140A, and opposite ends of each of the two Y-caps have a first large current path 111 and a second Two nodes may be connected to the high current path 112 .

The compensation capacitor unit 150A may flow the compensation currents IC1 and IC2 induced by the compensation transformer 140A to the power line. When the compensation currents IC1 and IC2 compensate (or cancel) the first currents I11 and I12 , the current compensation apparatus 100A may reduce noise.

Meanwhile, the compensation capacitor unit 150A may be configured such that the current IL1 flowing between the two large current paths 111 and 112 through the compensation capacitor is less than a first threshold level. Also, the compensation capacitor unit 150A may be configured such that the current IL2 flowing between each of the two large current paths 111 and 112 and the first reference potential 601 through the compensation capacitor is less than the second threshold level.

The active current compensating device 100A according to an embodiment may realize an isolated structure by using the compensating transformer 140A and the sensing transformer 120A.

3 shows a more specific example of the embodiment shown in FIG. 2 , and schematically shows an active current compensating device 100A-1 according to an embodiment of the present invention. The active current compensating device 100A-1 shown in FIG. 3 is an example of the active current compensating device 100A shown in FIG. 2 . The amplifying unit 130A included in the active current compensating device 100A-1 is an example of the amplifying unit 130 of the active current compensating device 100A.

The active current compensating device 100A-1 according to an embodiment may include a sensing transformer 120A, an amplifying unit 130A, a compensating transformer 140A, and a compensating capacitor unit 150A. In an embodiment, the active current compensator 100A-1 may further include a decoupling capacitor unit 170A on the output side (ie, the second device 200 side). In another embodiment, the decoupling capacitor unit 170A may be omitted. Descriptions of the sensing transformer 120A, the compensating transformer 140A, and the compensating capacitor unit 150A are omitted because they overlap.

The amplifying unit 130A of the active current compensating device 100A-1 according to an embodiment may include an integrated circuit unit 131A and a non-integrated circuit unit. The components other than the integrated circuit unit 131A in the amplifying unit 130A may be included in the non-integrated circuit unit. For example, components included in the non-integrated circuit unit in the amplifying unit 130A may be discrete commercial devices, but are not limited thereto.

In an embodiment, the integrated circuit unit 131A may include a first transistor 11 , a second transistor 12 , and/or one or more resistors. In one embodiment, the first transistor 11 may be an npn BJT, and the second transistor 12 may be a pnp BJT. For example, the amplifier 130A may have a push-pull amplifier structure including an npn BJT and a pnp BJT.

For example, one or more resistors included in the integrated circuit unit 131A may include R _npn , R _pnp , and/or Re _e . For example, the resistor R _npn may connect the collector terminal and the base terminal of the first transistor 11 , the resistor R _pnp may connect the collector terminal and the base terminal of the second transistor 12 , and the resistor R _e is the first transistor The emitter end of (11) and the emitter end of the second transistor 12 may be connected.

In an embodiment, the integrated circuit unit 131A of the amplifying unit 130A may further include a diode 13 in addition to the first transistor 11 , the second transistor 12 , and one or more resistors. For example, one end of the diode 13 may be connected to the base terminal of the first transistor 11 , and the other end of the diode 13 may be connected to the base terminal of the second transistor 12 . In an alternative embodiment, the diode 13 may be replaced by a resistor.

In an embodiment, the resistors R _npn , R _pnp , _Re , and/or the biasing diode 13 included in the integrated circuit unit 131A may be used for a DC bias of the BJT. Since the above components are general-purpose components in various active current compensating devices, they may be integrated into the integrated circuit unit 131A of a single chip.

Components of the amplifying unit 130A except for the integrated circuit unit 131A may be included in the non-integrated circuit unit. The integrated circuit unit 131A may be physically implemented as one IC chip. The non-integrated circuit unit may be composed of discrete commercial devices. The non-integrated circuit unit may be implemented differently depending on the embodiment.

3 , the non-integrated circuit unit may include, for example, capacitors C _b , C _e , and C _dc , and impedances Z ₁ and Z ₂ .

In an embodiment, the induced current induced in the secondary side 122A by the sensing transformer 120A may be differentially input to the amplifier 130A. Capacitors C _b and C _e included in the amplifier 130A may selectively couple only an alternating current (AC) signal. The capacitors C _b and C _e may block the DC voltage at the base node and the emitter node of the first and second transistors 11 and 12 .

In one embodiment, the power supply 400 supplies a direct current (DC) voltage V _dc based on the second reference potential 602 to drive the amplifying unit 130A. The capacitor C _dc is a decoupling capacitor for DC with respect to the voltage V _dc , and may be connected in parallel between the power supply 400 and the second reference potential 602 . The capacitor C _dc may selectively couple only the AC signal between the collectors of the first transistor 11 (eg, npn BJT) and the second transistor 12 (eg, pnp BJT).

The current gain of the amplifier 130A may be controlled by the ratio of the impedances Z ₁ and Z ₂ . Accordingly, Z ₁ and Z ₂ may be implemented outside the one-chip integrated circuit unit 131A. Z ₁ and Z ₂ may be flexibly designed according to the required target current gain according to the turns ratio of the sensing transformer 120A and the compensating transformer 140A.

In the integrated circuit unit _131A , resistors R _npn , R _pnp , and Re may adjust operating points of the first and second transistors 11 and 12 (eg, BJT). The resistors R _npn , R _pnp , and Re can be designed according to the operating point of the _BJT . The resistor R _npn is a collector terminal and a power supply 400 terminal of the first transistor 11 (eg, npn BJT) and a base terminal of the first transistor 11 (eg, npn BJT). can be connected The resistor R _pnp is a collector terminal of the second transistor 12 (eg, pnp BJT) and connects the second reference potential 602 and the base terminal of the second transistor 12 (eg, pnp BJT). can The resistor _Re may connect an emitter terminal of the first transistor 11 and an emitter terminal of the second transistor 12 .

The secondary side 122A side of the sensing transformer 120A according to an embodiment may be connected between the base side and the emitter side of the first and second transistors 11 and 12 . The primary side 141A side of the compensation transformer 140A according to an embodiment may be connected between the collector side and the base side of the first and second transistors 11 and 12 . Here, the connection includes an indirect connection case. The amplifying unit 130A according to an embodiment may have a regression structure in which the output current is injected back into the bases of the first and second transistors 11 and 12 . Due to the regression structure, the amplifying unit 130A may stably obtain a constant current gain for the operation of the active current compensating device 100A-1.

In the case of a positive swing in which the input voltage of the amplifier 130A due to the noise signal is greater than 0, the first transistor 11 (eg, npn BJT) may operate. In this case, the operating current may flow through the first path passing through the first transistor 11 . In the case of a negative swing in which the input voltage of the amplifying unit 130A due to noise is less than 0, the second transistor 12 (eg, pnp BJT) may operate. In this case, the operating current may flow through the second path passing through the second transistor 12 .

The integrated circuit unit 131A may be implemented as a one-chip IC. According to an exemplary embodiment, the first transistor 11 , the second transistor 12 , the diode 13 , R _npn , R _pnp , and Re of the integrated circuit unit _131A may be integrated into a single chip.

The single-chip IC has a terminal b1 corresponding to the base of the first transistor 11 , a terminal c1 corresponding to the collector of the first transistor 11 , and a terminal corresponding to the emitter of the first transistor 11 . (e1), a terminal b2 corresponding to the base of the second transistor 12, a terminal c1 corresponding to the collector of the second transistor 12, and a terminal corresponding to the emitter of the second transistor 12 (e1) may be included. However, the present invention is not limited thereto, and the single chip of the integrated circuit unit 131A may further include other terminals in addition to the terminals b1, b2, c1, c2, e1, and e2.

In various embodiments, at least one of terminals b1 , b2 , c1 , c2 , e1 , and e2 of the integrated circuit unit 131A may be connected to the non-integrated circuit unit. The integrated circuit unit 131A and the non-integrated circuit unit may be combined together to function as the amplifying unit 130A according to an exemplary embodiment.

According to the embodiment shown in FIG. 3 , capacitors C _b of the non-integrated circuit unit may be connected to the base terminal b1 of the first transistor 11 and the base terminal b2 of the second transistor 12 , respectively. Capacitors C _e of the non-integrated circuit part may be connected to the emitter terminal e1 of the first transistor 11 and the emitter terminal e2 of the second transistor 12 , respectively. The external power supply 400 may be connected between the collector terminal c1 of the first transistor 11 and the collector terminal c2 of the second transistor 12 . The collector terminal c2 of the second transistor 12 may correspond to the second reference potential 602 . The decoupling capacitor C _dc of the non-integrated circuit unit may be connected between the collector terminal c1 of the first transistor 11 and the collector terminal c2 of the second transistor 12 .

The combination of the integrated circuit unit 131A and the non-integrated circuit unit C _b , C _e , C _dc , Z ₁ , and Z ₂ may function as the amplifying unit 130A according to the embodiment shown in FIG. 3 .

According to various embodiments of the present disclosure, essential components of the active current compensating devices 100A and 100A-1 may be integrated in the one-chip integrated circuit unit 131A. Accordingly, the size of the amplification units 130 and 130A may be minimized by using the integrated circuit units 131 and 131A of a single chip compared to the case of using a discrete semiconductor device.

The inductor, capacitor (eg, C _b , C _e , C _dc ), Z ₁ and Z ₂ of the non-integrated circuit unit are individual components, and may be implemented around the integrated circuit unit 131A of a single chip. have.

The capacitance required for capacitors C _b , C _e , and C _dc to couple an alternating current (AC) signal can be several μF or more (eg, 10 μF). Since this capacitance value is difficult to implement in a single-chip integrated circuit unit, capacitors C _b , C _e , and C _dc may be implemented outside the integrated circuit unit, that is, in a non-integrated circuit unit.

Impedances Z ₁ and Z ₂ may be implemented outside the integrated circuit part, ie, in the non-integrated circuit part, to achieve design flexibility for various power systems or various first devices 300 . Z ₁ and Z ₂ may be flexibly designed according to the required target current gain according to the turns ratio of the sensing transformer 120A and the compensating transformer 140A. By adjusting the impedances Z ₁ and Z ₂ , various current compensating devices capable of applying the same integrated circuit unit 131A to various power systems can be designed. In particular, the size and impedance characteristics of the sensing transformer 120A should vary according to the maximum rated current of the first device 300 . Therefore, in order to make the ratio of injection current to sensing noise current uniform in a wide frequency range, proper design of Z ₁ and Z ₂ is required. By adjusting the turns ratio of the sensing transformer 120A and the compensating transformer 140A, and the ratio of Z ₁ and Z ₂ , the ratio of the injection current to the sensing noise current in a wide frequency range can be designed as 1. To this end, impedances Z ₁ and Z ₂ may be implemented outside the integrated circuit unit 131A for design flexibility. In an embodiment, each of Z ₁ and Z ₂ may include a series connection of a resistor and a capacitor.

Since the integrated circuit unit 131A according to various embodiments of the present disclosure is designed in consideration of scalability, it may be used in various types of active current compensating devices. For example, the integrated circuit unit 131A includes the current compensating device 100A-1 shown in FIG. 3 , the current compensating device 100A-2 shown in FIG. 4 , and the current compensating device 100A-3 shown in FIG. 5 . , and may be used in the current compensation device 100B shown in FIG. 6 . The same type of integrated circuit unit 131A may be used in various embodiments, and the non-integrated circuit unit may be designed differently depending on the embodiment.

In various embodiments of the present invention, by using the amplifying unit 130 divided into an integrated circuit unit and a non-integrated circuit unit, various types of active current compensating devices can be mass-produced through mass production of the integrated circuit unit. In addition, it is possible to minimize the size of the active current compensation device.

As such, the active current compensator 100, 100A, 100A-1, 100A-2, 100A-3, 100B according to various embodiments is characterized in that it is divided into an integrated circuit unit and a non-integrated circuit unit.

Meanwhile, the active current compensation device 100A-1 may further include a decoupling capacitor unit 170A on the output side (ie, the second device 200 side). One end of each capacitor included in the decoupling capacitor unit 170A may be connected to the first large current path 111 and the second large current path 112 , respectively. The opposite end of each capacitor may be connected to the first reference potential 601 of the current compensating device 100A-1.

The decoupling capacitor unit 170A may prevent the output performance of the compensating current of the active current compensating device 100A-1 from being significantly changed according to a change in the impedance value of the second device 200 . The impedance Z _Y of the decoupling capacitor unit 170A may be designed to have a value smaller than a value specified in the first frequency band to be noise reduced. Due to the coupling of the decoupling capacitor unit 170A, the current compensation device 100A-1 can be used as an independent module in any system.

According to an exemplary embodiment, the decoupling capacitor unit 170A in the active current compensator 100A-1 may be omitted.

4 schematically shows the configuration of an active current compensating device 100A-2 according to another embodiment of the present invention. Hereinafter, descriptions of content overlapping with those described with reference to FIGS. 2 to 3 will be omitted.

Referring to FIG. 4 , the active current compensating device 100A-2 includes first currents I11, I12, and I13 inputted in a common mode to each of the high current paths 111 , 112 , and 113 connected to the first device 300 . can be actively compensated for.

To this end, the active current compensating device 100A-2 includes three large current paths 111, 112, and 113, a sensing transformer 120A-2, an amplifying unit 130A, a compensating transformer 140A, and a compensating capacitor unit 150A- 2) may be included.

In comparison with the active current compensating devices 100A and 100A-1 according to the above-described embodiment, the active current compensating device 100A-1 according to the embodiment shown in FIG. 4 has three large current paths 111, 112, 113), and accordingly, there is a difference between the sensing transformer 120A-2 and the compensation capacitor unit 150A-2. Therefore, hereinafter, the active current compensating device 100A-2 will be described focusing on the above-described differences.

The active current compensator 100A-2 may include a first large current path 111 , a second large current path 112 , and a third large current path 113 that are separated from each other. According to an embodiment, the first large current path 111 may be an R-phase power line, the second large current path 112 may be an S-phase power line, and the third large current path 113 may be a T-phase power line. The first currents I11 , I12 , and I13 may be input to each of the first large current path 111 , the second large current path 112 , and the third large current path 113 in a common mode.

The primary side 121A-2 of the sensing transformer 120A-2 is disposed in each of the first, second, and third large current paths 111, 112, and 113, and an induced current is induced in the secondary side 122A-2. can create The magnetic flux density generated in the sensing transformer 120A-2 by the first currents I11, I12, and I13 on the three large current paths 111, 112, and 113 may be reinforced with each other.

In the active current compensator 100A-2 according to the embodiment shown in FIG. 4 , the amplifying unit 130A may correspond to the above-described amplifying unit 130A.

The compensation capacitor unit 150A-2 includes a path through which the compensation currents IC1, IC2, and IC3 generated by the compensation transformer 140A flow to the first, second, and third large current paths 111, 112, and 113, respectively. can provide

The active current compensation device 100A-2 may further include a decoupling capacitor unit 170A-2 on the output side (ie, the second device 200 side). One end of each capacitor included in the decoupling capacitor unit 170A-2 may be connected to the first large current path 111 , the second large current path 112 , and the third large current path 113 , respectively. The opposite end of each capacitor may be connected to the first reference potential 601 of the current compensating device 100A-2.

The decoupling capacitor unit 170A-2 may prevent the output performance of the compensating current of the active current compensating device 100A-2 from greatly changing according to a change in the impedance value of the second device 200 . The impedance Z _Y of the decoupling capacitor unit 170A-2 may be designed to have a value smaller than a value specified in the first frequency band to be noise reduced. Due to the coupling of the decoupling capacitor unit 170A-2, the current compensation device 100A-2 can be used as an independent module in any system (eg, a three-phase three-wire system).

According to an embodiment, the decoupling capacitor unit 170A-2 in the active current compensator 100A-2 may be omitted.

The active current compensating device 100A-2 according to this embodiment may be used to compensate (or cancel) the first currents I11, I12, and I13 moving from the load of the three-phase, three-wire power system to the power source. .

Of course, according to the spirit of the present invention, the active current compensation device according to various embodiments may be modified to be applied to a three-phase four-wire system.

The amplifying unit 130A according to an embodiment of the present invention may be applied to a single-phase (two-wire) system shown in FIG. 2, a three-phase three-wire system shown in FIG. 3, and a three-phase four-wire system, although not shown. have. Since the integrated circuit unit 131A of a single chip can be applied to several systems, the integrated circuit unit 131A may have versatility in the active current compensation device according to various embodiments.

As described above with reference to FIG. 3 , the integrated circuit unit 131A may include a first transistor 11 , a second transistor 12 , and/or one or more resistors. In addition, according to an embodiment, the integrated circuit unit 131A may further include a diode 13 . In an alternative embodiment, the diode 13 may be replaced by a resistor.

The IC chip in which the integrated circuit part 131A is embedded has a base terminal b1 of the first transistor 11 , a collector terminal c1 of the first transistor 11 , and an emitter terminal e1 of the first transistor 11 . ), a base terminal b2 of the second transistor 12 , a collector terminal c1 of the second transistor 12 , and an emitter terminal e1 of the second transistor 12 . However, the present invention is not limited thereto, and the single chip of the integrated circuit unit 131A may further include other terminals in addition to the terminals b1, b2, c1, c2, e1, and e2.

The integrated circuit portion 131A may be combined with a non-integrated circuit portion including discrete components such as inductors, capacitors (eg, C _b , C _e , C _dc ), Z ₁ and Z ₂ , in various embodiments. It is possible to configure a current compensating device according to the For example, the individual components of the non-integrated circuit unit may be general commercial devices. However, the present invention is not limited thereto.

Discrete components such as inductors, capacitors (eg, C _b , C _e , C _dc ), Z ₁ and Z ₂ are implemented around the IC chip in which the integrated circuit unit 131A is embedded.

The capacitance required for capacitors C _b , C _e , and C _dc to couple the low frequency AC signal may be several μF or more. Since this capacitance value is difficult to implement in the IC chip in which the integrated circuit unit 131A is embedded, the capacitors C _b , C _e , and C _dc may be implemented outside the integrated circuit unit, that is, in the non-integrated circuit unit.

Impedances Z ₁ and Z ₂ may be implemented outside the integrated circuit unit, ie, in the non-integrated circuit unit, in order to achieve design flexibility for various first devices 300 . By adjusting the impedances Z ₁ and Z ₂ , various current compensating devices capable of applying the same integrated circuit unit 131A to various power systems can be designed. In particular, the size and impedance characteristics of the sensing transformer 120A should vary according to the maximum rated current of the first device 300 . Therefore, in order to make the ratio of injection current to sensing noise current uniform in a wide frequency range, proper design of Z ₁ and Z ₂ is required. Accordingly, Z ₁ and Z ₂ may be implemented outside the integrated circuit unit 131A, ie, in the non-integrated circuit unit for design flexibility. In an embodiment, Z ₁ may be a series connection of a resistor R ₁ and a capacitor C ₁ , and Z ₂ may be a series connection of a resistor R ₂ and a capacitor C ₂ . Since C ₁ and C ₂ are additionally implemented in series next to R ₁ and R ₂ , respectively, the ratio of injection current to sensing noise current in the low frequency range can have better performance.

5 schematically shows the configuration of an active current compensating device 100A-3 according to another embodiment of the present invention. Hereinafter, descriptions of content overlapping with those described with reference to FIGS. 2 to 3 will be omitted.

Referring to FIG. 5 , the active current compensating device 100A-3 actively compensates the first currents I11 and I12 input in a common mode to each of the high current paths 111 and 112 connected to the first device 300 . can do.

To this end, the active current compensator 100A-3 includes two large current paths 111 and 112, a sensing transformer 120A, an amplifying unit 130A-3, a compensating transformer 140A, and a compensating capacitor unit 150A. can do.

The active current compensating device 100A-3 may be an example of the active current compensating device 100A illustrated in FIG. 2 . The amplifying unit 130A-3 may be an example of the amplifying unit 130 illustrated in FIG. 2 .

The amplifying unit 130A-3 of the active current compensator 100A-3 according to an exemplary embodiment may include an integrated circuit unit 131A and a non-integrated circuit unit. The components other than the integrated circuit unit 131A in the amplifying unit 130A-3 may be included in the non-integrated circuit unit.

The integrated circuit unit 131A may correspond to the above-described integrated circuit unit 131A. That is, the above-described integrated circuit unit 131A may also be applied to the active current compensator 100A-3 according to the embodiment shown in FIG. 5 . Accordingly, the description of the integrated circuit unit 131A is overlapped, and thus only simplified.

As described above, the integrated circuit unit 131A may include the first transistor 11 , the second transistor 12 , and/or one or more resistors. In one embodiment, the first transistor 11 may be an npn BJT, and the second transistor 12 may be a pnp BJT. For example, the amplifier 130A-3 may have a push-pull amplifier structure including an npn BJT and a pnp BJT. The integrated circuit unit 131A may further include a diode 13 in addition to the first transistor 11 , the second transistor 12 , and one or more resistors. For example, one end of the diode 13 may be connected to the base terminal of the first transistor 11 , and the other end of the diode 13 may be connected to the base terminal of the second transistor 12 . In an alternative embodiment, the diode 13 may be replaced by a resistor.

The induced current induced in the secondary side 122A by the sensing transformer 120A may be differentially input to the amplifying unit 130A-3. At the input terminal of the amplifying unit 130A-3, a resistor R _in may be connected in parallel to the secondary side 122A. The resistor R _in may adjust the input impedance of the amplifier 130A-3. Capacitors C _b and C _e can only selectively couple AC signals.

The power supply 400 supplies a DC low voltage (V _dc ) based on the second reference potential 602 to drive the amplifying unit 130A-3 . C _dc is a decoupling capacitor for DC and may be connected in parallel to the power supply 400 . C _dc may selectively couple only the AC signal between the collectors of the first transistor 11 (eg, npn BJT) and the second transistor 12 (eg, pnp BJT).

The above-described resistor R _in , capacitors C _b , C _e , and C _dc may be included in the non-integrated circuit unit.

On the other hand, in the sensing transformer 120A, when the turns ratio of the primary side 121A and the secondary side 122A is 1:N _sen , the current induced in the secondary side 122A is the first current I11, I12 ) is 1/N _sen times, and in the compensation transformer 140A, if the turns ratio of the primary side 141A and the secondary side 142A is 1:N _inj , the current induced in the secondary side 142A is, 1/N _inj times the current (ie, amplification current) flowing through the primary side 141A. Therefore, in order to cancel the first currents I11 and I12, in order to generate compensation currents IC1 and IC2 having the same magnitude as the first currents I11 and I12 and opposite in phase to the first currents I11 and I12, The current gain can be designed to be N _sen ·N _inj .

Meanwhile, the current flowing through the collector-emitter varies according to the voltage applied between the base-emitter of the BJT. In the case of a positive swing in which the input voltage of the amplifying unit 130A-3 due to noise is greater than zero, the first transistor 11 (eg, npn BJT) may operate. In the case of a negative swing in which the input voltage of the amplifying unit 130A-3 due to noise is less than 0, the second transistor 12 (eg, pnp BJT) may operate.

The active current compensator 100A-3 according to this embodiment may be used to compensate (or cancel) the first currents I11 and I12 moving from the load of the single-phase (two-wire) power system to the power source. . However, the present invention is not limited thereto.

6 schematically shows the configuration of an active current compensation device 100B according to another embodiment of the present invention.

Referring to FIG. 6 , the active current compensating device 100B includes first currents I11, I12, I13, I11, I12, I13, I14) can be actively compensated.

The active current compensator 100B according to an embodiment includes four large current paths 111, 112, 113, 114, a noise coupling capacitor unit 181, a sensing transformer 120B, an amplifier 130B, and a compensator ( 160B), a compensation distribution capacitor unit 182, and a decoupling capacitor 170B.

The active current compensating device 100B is different from the current compensating devices 100A, 100A-1, 100A-2, and 100A-3 according to the above-described embodiments to be non-insulated from the large current paths 111, 112, 113, and 114. can However, the same integrated circuit unit 131A as in the above-described embodiments may also be used in the active current compensation device 100B.

The active current compensator 100B according to an embodiment may include a first large current path 111 , a second large current path 112 , a third large current path 113 , and a fourth large current path 114 that are separated from each other. can According to an embodiment, the first large current path 111 is an R-phase, the second large current path 112 is an S-phase, the third large current path 113 is a T-phase, and the fourth large current path 114 is an N-phase power line. can be The first currents I11 , I12 , I13 , and I14 are transmitted in a common mode to each of the first large current path 111 , the second large current path 112 , the third large current path 113 , and the fourth large current path 114 . can be entered.

In an embodiment, the active current compensation device 100B may include a noise coupling 0 capacitor unit 181 on the input side (ie, the first device 300 side). The noise coupling capacitor unit 181 may include X-capacitors (X-caps) for coupling noise between phases.

The primary side 121B of the sensing transformer 120B is disposed in each of the first large current path 111 , the second large current path 112 , the third large current path 113 , and the fourth large current path 114 , 2 An induced current may be generated in the car side 122B. The magnetic flux densities generated in the sensing transformer 120B by the first currents I11 , I12 , I13 , and I14 on the four large current paths 111 , 112 , 113 , and 114 may be reinforced with each other.

The amplifying unit 130B may be divided into an integrated circuit unit 131A and a non-integrated circuit unit. The components other than the integrated circuit unit 131A in the amplifying unit 130B may be included in the non-integrated circuit unit. For example, components included in the non-integrated circuit unit may be discrete commercial devices, but are not limited thereto.

The integrated circuit unit 131A may correspond to the above-described integrated circuit unit 131A. That is, the above-described integrated circuit unit 131A may also be applied to the active current compensating device 100B according to the embodiment shown in FIG. 6 . Accordingly, the description of the integrated circuit unit 131A is duplicated, and thus will be omitted.

In the amplifying unit 130B, the non-integrated circuit unit may be implemented differently from the above-described embodiments. In this embodiment, the non-integrated circuit unit may include impedances Z ₀ , Z _d , capacitors C _b , C _e , and C _dc .

Impedances Z ₀ and Z _d may be connected to the base side of the first and second transistors 11 and 12 . Here, the connection includes an indirect connection. The impedance Z _d may be provided for high frequency stability. For example, Z _d may be a resistor or a ferrite bead. However, the present invention is not limited thereto. Impedance Z ₀ may be provided for low frequency stability. Also, Z ₀ may block the DC signal. For example, Z ₀ may be a series connection of a resistor and a capacitor. However, the present invention is not limited thereto.

Meanwhile, the amplifying unit of the current compensating device 100B is not limited to the amplifying unit 130B. The amplification unit of the current compensator 100B may be implemented as one of the amplification units including the above-described amplifying unit 130A, amplifying unit 130A-1, amplifying unit 130A-2, and amplifying unit 130A-3. may be However, the present invention is not limited thereto.

The compensator 160B may inject a compensation current into one large current path (eg, the fourth large current path 114 ). A compensation distribution capacitor unit 182 may be provided on the output side of the active current compensation device 100B (ie, the second device 200 side). The compensation distribution capacitor unit 182 may be composed of X-capacitors.

The active current compensation device 100B may include a decoupling capacitor 170B on the output side (ie, the second device 200 side). The decoupling capacitor 170B may be a Y-capacitor for decoupling the AC power end impedance.

The active current compensating device 100B according to this embodiment may be used to compensate (or cancel) the first currents I11, I12, I13, and I14 moving from the load of the three-phase, four-wire power system to the power source. .

The active current compensator 100 , 100A, 100A-1 , 100A-2 , 100A-3 , and 100B according to various embodiments has a small increase in size and heat generation in a high-power system compared to a passive EMI filter.

The active current compensating device according to various embodiments includes single-chip integrated circuit units 131 and 131A, and thus has a size minimized compared to a case in which a discrete semiconductor device is included. The integrated circuit unit 131A is universally and universally ( universally) can be applied.

The integrated circuit unit 131A and the active current compensator including the integrated circuit unit 131A according to various embodiments may be used in various power electronic products regardless of a power rating. The integrated circuit unit 131A and the active current compensation device including the same according to various embodiments can be expanded to a high-power and high-noise system.

Due to the one-chip integrated circuit unit 131A, the function of the active current compensating device can be expanded without additional components.

The integrated circuit unit 131A according to various embodiments may be sufficiently robust against an excessive voltage of a large current path in which an active current compensator is installed.

The specific implementations described in the present invention are only examples, and do not limit the scope of the present invention in any way. For brevity of the specification, descriptions of conventional electronic components, control systems, software, and other functional aspects of the systems may be omitted. In addition, the connection or connection members of lines between the components shown in the drawings illustratively represent functional connections and/or physical or circuit connections, and in an actual device, various functional connections, physical connections that are replaceable or additional may be referred to as connections, or circuit connections.

The spirit of the present invention should not be limited to the above-described embodiments, and not only the claims described below, but also all ranges equivalent to or changed from these claims, fall within the scope of the spirit of the present invention. will do it

Claims (6)

An active current compensating device for actively compensating for noise generated in a common mode in each of at least two or more large current paths,
at least two or more high current paths for transferring power supplied by the second device to the first device;
a sensing unit generating an output signal corresponding to a common mode noise current on the large current path;
an amplifying unit amplifying the output signal to generate an amplified current; and
a compensator for generating a compensation current based on the amplified current and allowing the compensation current to flow through each of the at least two large current paths; and
The amplifying unit includes a non-integrated circuit unit and a one-chip integrated circuit unit,
The non-integrated circuit unit is designed according to the power system of at least one of the first device and the second device,
The single-chip integrated circuit unit is independent of the rated power specifications of the first device and the second device,
Active current compensator. According to claim 1,
The non-integrated circuit unit is designed according to the rated power of the first device,
Active current compensator. 2. The method of claim 1
The one-chip integrated circuit portion comprises a first transistor, a second transistor, and one or more resistors,
Active current compensator. 4. The method of claim 3,
The non-integrated circuit unit includes a first impedance (Z ₁ ) connecting emitter node sides of the first transistor and the second transistor to an input terminal of the compensator, and base node sides of the first transistor and the second transistor And a second impedance (Z ₂ ) connecting the input terminal of the compensator, including,
Active current compensator. 5. The method of claim 4,
The sensing unit includes a sensing transformer,
The compensating unit includes a compensating transformer,
The value of the first impedance or the value of the second impedance is determined based on a turns ratio of the sensing transformer and the compensating transformer, and a target current gain of the amplifying unit,
The configuration of the single-chip integrated circuit unit is independent of the turns ratio and the target current gain,
Active current compensator. 5. The method of claim 4,
According to the design of the first impedance and the second impedance, the single chip integrated circuit unit is used for the first device of various power systems.
Active current compensator.

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