KR101261357B1 - Driving Control Apparatus and Method of Feeding Inverter for Online Electric Vehicle - Google Patents

Abstract

Disclosed are an operation control apparatus and a method of a power supply inverter. Operation control apparatus of a power supply inverter according to an embodiment of the present invention, the rectifier for rectifying the input AC power; A plurality of switches connected in series to form a leg, the plurality of legs connected in parallel, and an inverter supplying high frequency power through a plurality of segments formed based on a common contact between switches of different legs; And a controller for turning on / off the rectifier and each switch, and controlling a pulse width applied to each segment based on the power rectified by the rectifier, wherein the controller is an adjacent segment in any one of the plurality of segments. In the case of controlling to switch to, the phase difference of the waveform with the previous segment at the same time as the turn-on of the adjacent segment is (180-α) ° (If the phase difference is β, α is a pulse interval superimposed on the previous segment. It is characterized by controlling so that it is a phase difference corresponding to (alpha) + (beta) = 180 degrees).

Description

Motion Control Apparatus and Method for Controlling Power Supply Inverter for Online Electric Vehicles {Driving Control Apparatus and Method of Feeding Inverter for Online Electric Vehicle}

An embodiment of the present invention relates to an operation control apparatus and a control method of an on-line electric power feeding inverter. More specifically, the present invention relates to an operation control apparatus and a control method of an on-line electric power feeding inverter for maximizing the efficiency of the current collector by removing the nth harmonic that deviates from the EMI standard conducted by the power feeding inverter.

Countries around the world are actively supporting the development of eco-friendly vehicles due to tightening environmental regulations, depletion of petroleum resources, and oil price hikes. .

Under these circumstances, the development of electric vehicles using alternative energy such as natural gas and ethanol and electric energy is emerging as a representative next-generation automobile technology.However, the electric vehicles currently under development are required for mileage, weight, price, charging time and infrastructure. There is a limit on the back.

Against this background, there is an attempt to develop a technology for an on-line electric vehicle system that overcomes the limitations of the electric vehicle currently under development and ultimately enables to collect and charge while driving.

The online electric vehicle system converts a high frequency induction magnetic field generated from a high frequency alternating current supplied through a feed line from a power supply inverter into a voltage by a current collecting module mounted on a lower part of a vehicle, and then boosts the voltage through a current collecting regulator to charge a battery. That is, the feed inverter conducts a high frequency current to the feed line, an induction magnetic field is generated inside the feed line by the high frequency current through the power cable, and an induction magnetic path is created through the ferrite core. The magnetic field is then converted back into electricity. In this way, the power supply inverter is also referred to as a contact-less power supply (CPS) because it plays a role of transmitting power by magnetic coupling without electrical and mechanical contact.

On-line electric vehicles are required to have a ground clearance, which is the distance between the road surface and the current collecting module mounted on the lower part of the vehicle, to be 12 cm or more according to the automobile safety standard. In addition, the magnetic field around the vehicle, the Electro-Magnetic Field (EMF), should be less than 62.6 mG (milligauss) (International Commission on Non-Ionizing Radiation Protection (ICNIRP) recommendations). In particular, the online electric vehicle system must divide the feeder into several segments, control each segment on / off according to the progress of the vehicle, and satisfy the EMI (Electro Magnetic Interference) standard.

However, due to the electrical characteristics of the feed line, the n-th harmonic that deviates from the EMI standard may be conducted by the feed inverter, and the n-th harmonic may act as a problem of reducing current collection efficiency of the current collector.

An embodiment of the present invention has been devised to solve the above-described problems, the power supply inverter for on-line electric vehicle to maximize the efficiency of the current collector by removing the n-th harmonic that is out of the EMI standard conducted by the power supply inverter An object of the present invention is to provide an operation control apparatus and a control method thereof.

Operation control apparatus for a power supply inverter according to an embodiment of the present invention for achieving the above object, the rectifying unit for rectifying the AC power input; A plurality of switches connected in series to form a leg, the plurality of legs connected in parallel, and an inverter supplying high frequency power through a plurality of segments formed based on a common contact between switches of different legs; And a controller for turning on / off the rectifier and each switch, and controlling a pulse width applied to each segment based on the power rectified by the rectifier, wherein the controller is an adjacent segment in any one of the plurality of segments. In the case of controlling the switching to, the phase difference with the waveform applied to the previous segment at the same time as the turn-on of the adjacent segment is (180-α) ° (α represents the pulse applied to the adjacent segment and the pulse applied to the previous segment. And a phase corresponding to the overlapping section.

Preferably, the operation control apparatus of the power supply inverter may further include a DC / DC converter for DC / DC conversion of the power rectified by the rectifier to supply to the inverter.

The controller may control off the rectifier when the first segment is controlled to switch from the first segment to the adjacent second segment, and when the output voltage of the rectifier becomes less than or equal to a set value, the controller may control off the first segment and turn on the second segment. It is preferable to control on the rectifying part later.

Alternatively, when the control unit is controlled to switch from the first segment to the adjacent second segment, the control unit turns off the rectifier and turns off the DC / DC converter, and when the output voltage of the DC / DC converter is less than or equal to the set value, the first segment May be controlled to be turned off and the second segment is turned on, and then the DC / DC converter is turned on and the rectifier is turned on.

Operation control method of the power supply inverter according to an embodiment of the present invention for achieving the above object, the rectifying unit for rectifying the AC power input; A plurality of switches connected in series to form a leg, the plurality of legs connected in parallel, and an inverter supplying high frequency power through a plurality of segments formed based on a common contact between switches of different legs; And a controller for turning on / off the rectifier and each switch, and controlling a pulse width applied to each segment based on the power rectified by the rectifier. When controlling to switch from one segment to an adjacent second segment, receiving a first segment switching signal; Controlling the rectifier off; If the output voltage of the rectifier is less than or equal to the set value, controlling off the first segment; And turning on the second segment and turning on the rectifier.

Here, the operation control method of the power supply inverter is a (180-α) ° (α is a pulse applied to the first segment after a predetermined time difference with the waveform applied to the first segment at the same time as the turn-on of the second segment It is preferable to control so that the phase corresponding to the overlapping interval of the pulse applied to the two segments).

Operation control method of the power supply inverter according to another embodiment of the present invention for achieving the above object, the rectifying unit for rectifying the AC power input; A DC / DC converter for supplying DC / DC converted power rectified by the rectifier to an inverter; A plurality of switches connected in series to form a leg, the plurality of legs connected in parallel, and an inverter supplying high frequency power through a plurality of segments formed based on a common contact between switches of different legs; And a control unit which turns on / off a rectifier, a DC / DC converter, and each switch, and controls a pulse width applied to each segment based on the power rectified by the rectifier. Receiving a first segment switching signal when controlling to switch from a first segment to a second adjacent segment among the plurality of segments; Controlling the rectifier off; Controlling off the DC / DC converter; If the output voltage of the DC / DC converter is less than or equal to a set value, controlling off the first segment; And turning on the second segment, turning on the DC / DC converter, and controlling the rectifier on.

Here, in the operation control method of the power supply inverter, (180-α) ° (α is a pulse applied to the first segment after a predetermined time difference with the waveform applied to the first segment at the same time as the turn-on of the second segment And a phase corresponding to an overlapping section of the pulse applied to the second segment.

According to an exemplary embodiment of the present invention, when switching from one segment to another adjacent segment, the difference between the waveforms of the pulses applied to the previous segment and the waveforms of the pulses applied to the previous segment is (180-α) ° ( α is controlled to be the phase corresponding to the overlapping interval of the pulse applied to the adjacent segment and the pulse applied to the previous segment), thereby making it possible to obtain the effect of removing the nth harmonic that is out of the EMI specification. Can be maximized.

1 is a view showing a drive control apparatus of a power supply inverter according to an embodiment of the present invention.
2 is a view showing a driving control apparatus of a power supply inverter according to another embodiment of the present invention.
3 is a diagram illustrating an example of a circuit diagram of a resonant inverter used in FIG. 1 or FIG. 2.
FIG. 4 is a diagram illustrating waveforms applied to each segment when the switching operation is performed from one segment to an adjacent segment.
5 is a flowchart illustrating a driving control method of a power feeding inverter according to an embodiment of the present invention.
6 is a flowchart illustrating a driving control method of a power feeding inverter according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components as much as possible even if displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected,""coupled," or "connected. &Quot;

1 is a view showing a drive control apparatus of a power supply inverter according to an embodiment of the present invention.

Referring to FIG. 1, a driving control apparatus of a power supply inverter according to an embodiment of the present invention may include a rectifier 120 and an inverter 130.

The rectifier 120 is an electrical circuit device or device made with a focus on rectification in order to obtain a DC power from the AC power, has a function of passing current only in one direction, and is input from the three-phase AC power source 110. To rectify AC power to DC power. That is, the rectifier 120 is an element or device that periodically converts alternating current that changes in both positive and negative directions into a direct current having only one direction, and the forward resistance is small and the reverse resistance is sufficiently large so that the current can be generated only in one direction. The rectifying action to pass through is possible, and the forward direction through which the current flows smoothly and the reverse direction where the current rarely flows are distinguished according to the direction of the applied voltage. The rectifier 120 may be configured as a single device such as a diode, but in order to effectively rectify, a plurality of devices are usually arranged in a specific circuit. Silicon diodes are used in most power supplies and thyristors are widely used in controlled rectifier applications. Thyristors are sometimes referred to as silicon controlled rectifiers (SCRs), and are also seen as a type of silicon controlled rectifier. The thyristor consists of three terminals: anode, cathode, and gate.When a signal is applied to the gate, a reverse current is applied to the main circuit or a current is held without a continuous gate current supply. It remains energized until it falls below currrent.

Here, the three-phase AC power source 110 is an AC power source generated by a three-phase alternator having the same voltage and the same frequency and amplitude of the current, and having a phase difference of 120 ° from each other, and the same amount as that of the single-phase AC power source. It is widely used because of the small weight of the wire required to transmit power, the less heat of the Joule on the line, and the electric motor using three-phase alternating current is much superior to the single phase in the case of the electric motor.

The inverter 130 includes a plurality of switches connected in series to form a leg, a plurality of legs connected in parallel, and a plurality of segments formed on the basis of a common contact between switches of different legs. Supply high frequency power to the current collecting module mounted on the. On-line electric vehicles require many inverters, so it is desirable to cover as many segments as one inverter as possible. A transfer switch is required to power one of the multiple segments with one inverter. In this case, since the mechanical switch serving as the transfer switch has a long operation time and a limit in the number of operation (life), an embodiment of the present invention uses a semiconductor switch such as an Insulated Gate Bipolar Transistor (IGBT). Multi-leg inverters are configured by connecting legs in series with multiple switches in parallel. An example of the circuit diagram for this is described with reference to FIG. 3 described later.

The controller 140 turns on / off respective switches of the rectifier 120 and the inverter 130, and modulates pulse widths applied to respective segments of the inverter 130 based on the power rectified by the rectifier 120. Controls the (PWM: Pulse Width Modulation) signal. At this time, when the control unit 140 controls to switch from one segment of the plurality of segments of the inverter 130 to the adjacent segment, the phase difference with the waveform applied to the previous segment at the same time as the turn-on of the adjacent segment after a certain time It is preferable to control so that (180-α) ° (α is a phase corresponding to an overlapping interval of a pulse applied to an adjacent segment and a pulse applied to a previous segment). At this time, when the phase difference with the waveform applied to the previous segment is made at the same time as the turn-on of adjacent segments, α + β = 180 °.

To this end, the controller 140 controls the rectifier 120 to be turned off when the first segment is controlled to switch from the first segment to an adjacent second segment. When the output voltage of the rectifier is less than or equal to the set value, the controller 140 controls the first segment to be turned off. After the two segments are turned on, the rectifier 120 may be turned on.

2 is a view showing a driving control apparatus of a power supply inverter according to another embodiment of the present invention. Here, the configuration and function of the three-phase AC power source 210, rectifier 220 and inverter 240 is similar to the configuration and function of the three-phase AC power source 110, rectifier 120 and inverter 130 of FIG. Therefore, detailed description thereof will be omitted.

The DC / DC converter 230 may DC / DC convert the power rectified by the rectifier 220 to supply the inverter 240. The DC / DC converter 230 refers to an electronic circuit device that converts a DC power of a voltage into a DC power of another voltage and uses current control of a buck converter, which is a kind of the DC / DC converter 230. A free charge relay function and a main relay function can be implemented.

The controller 250 turns on / off respective switches of the rectifier 220, the DC / DC converter 230, and the inverter 240, and each of the inverters 240 based on the power rectified by the rectifier 220. Controls a Pulse Width Modulation (PWM) signal applied to a segment of. In this case, when the control unit 250 controls to switch from one of the plurality of segments of the inverter 240 to the adjacent segment, the phase difference with the waveform applied to the previous segment at the same time as the turn-on of the adjacent segment after a certain time It is preferable to control so that (180-α) ° (α is a phase corresponding to an overlapping interval of a pulse applied to an adjacent segment and a pulse applied to a previous segment). At this time, when the phase difference with the waveform applied to the previous segment is made at the same time as the turn-on of adjacent segments, α + β = 180 °.

To this end, when controlling to switch from the first segment to the adjacent second segment, the controller 250 controls the rectifier 220 off, controls the DC / DC converter 230 off, and the DC / DC converter 230. When the output voltage of the power supply is equal to or less than the set value, the first segment may be turned off, the second segment may be turned on, and then the DC / DC converter may be turned on and the rectifier 120 may be turned on.

3 is a diagram illustrating an example of a circuit diagram of a resonant inverter used in FIG. 1 or FIG. 2.

A resonant inverter, DC (Direct Current) input voltage (V _DC) positive (positive) first plurality of switches one end is connected to the terminal _{(S 11, S 21, S} 31), DC input voltage (V _DC) of A plurality of second switches S ₁₂ , S ₂₂ , S ₃₂ having one end connected to a negative terminal, the other end of each of the first switches S ₁₁ , S ₂₁ , and S ₃₁ , and each of the second switches S The other end of ₁₂ , S ₂₂ , and S ₃₂ is connected to the bottom of the vehicle through a plurality of segments Load1 and Load2 formed between different contacts among the plurality of contacts A1, A2, and A3 formed by being connected one-to-one. Supply power to the current collecting module. Here, in the case of FIG. 1, the DC input voltage V _DC means the voltage output through the rectifier 120, and in the case of FIG. 2, the voltage output through the DC / DC converter 230.

In the exemplary embodiment of the present invention, the first switch S ₁₁ and the second switch S ₁₂ connected one-to-one of the resonant inverter are referred to as leg 1, and the first switch S ₂₁ and the second switch connected one-to-one ( S ₂₂ ) is called leg 2, and the first switch S ₃₁ and the second switch S ₃₂ connected one-to-one are called leg 3. Each segment may be formed between neighboring legs. Here, although the resonant inverter is shown as having three legs, the number of legs is not limited thereto, and may include various numbers of legs. In addition, the segment is shown as formed between legs 1 and 2, and between legs 2 and 3, but the formation of the segment is not limited thereto, and is formed between legs 1 and 2 and between legs 1 and 3 Various modifications may be made, for example.

FIG. 4 is a diagram illustrating waveforms applied to each segment when the switching operation is performed from one segment to an adjacent segment.

In general, when the controllers 140 and 250 turn on at least one of the plurality of first switches S ₁₁ , S ₂₁ , and S ₃₁ , the controllers 140 and 250 are directly connected to the turned-on first switch and are in the same leg. It is preferable to keep the second switch S ₂₁ , S ₂₂ or S ₃₂ in the off state. For example, when turning on the first switch (S ₁₁₎ of the leg 1 in Figure 3, it is connected to the turned-on first switch (S ₁₁₎ and the second switch (S ₁₂₎ in the first same leg is turned off Is preferably maintained.

Similarly, the controller 140 or 250, when turning on at least one second switch of the plurality of second switches S ₁₂ , S ₂₂ , and S ₃₂ , is directly connected to the turned on second switch and is in the same leg. It is preferable to keep the first switch in the off state. For example, in FIG. 3, when the second switch S ₁₂ of leg 1 is turned on, the first switch S ₁₁ connected to the turned on second switch and in the same leg 1 is kept off. desirable.

The power supplied to the segment in which the online electric vehicle is located is defined as normal pressure, and the power supplied to the segment adjacent to the segment is defined as preliminary pressure.

First, a control operation performed by the controller 140 or 250 to supply power to a segment will be described.

In order to supply power to the segment, when the controllers 140 and 250 turn on the first switch connected to one end of the segment, the second switch connected to the other end of the segment at a time before the turned-on first switch at a predetermined time. It may turn on or turn on at a time later. Similarly, when the second switch connected to one end of the segment is turned on, the first switch connected to the other end of the segment may be turned on at a time before the second switch turned on or at a time after a predetermined time. In this case, the waveforms applied to both legs of the segment have a phase difference. In normal pressure, each switch is controlled so that the phase difference of each waveform approaches 180 degrees. In preliminary pressure, the phase difference of each waveform is 0. It is desirable to control each switch to approximate the figure. For example, assuming that the online electric vehicle is located in the first segment, each waveform applied to the leg 1 and the leg 2 is the first switch (S ₁₁ , S ₂₁ ) and each so that the phase difference approaches 180 degrees. Each second switch S ₁₂ , S ₂₂ is controlled, and for each second segment adjacent to the first segment, each first switch ( It is preferable to control S ₂₁ , S ₃₁ and the respective second switches S ₂₂ , S ₃₂ . In this case, no power is transmitted to the online electric vehicle because no online electric vehicle is located in the second segment. That is, when power is supplied to two or more adjacent segments, power is transmitted to the online electric vehicle through the segment at normal pressure, but power is not transmitted to the segment where the online electric vehicle is not located.

In the case of switching switching from one of the plurality of segments to the adjacent segment, the controllers 140 and 250 simultaneously turn on the adjacent segment and at the same time (180-α) ° ( If the phase difference is β, α is a phase difference corresponding to the pulse interval applied to the previous segment and is controlled to be α + β = 180 °. For example, when the switching switching operation is performed from the first segment to the adjacent second segment, the first switch S21 and the second switch S12 are turned on in the first segment, and the first switch S21 and the second switch S32 are turned on in the second segment. It may be turned on, and after a certain time with respect to the phase difference α of the interval where the waveform applied to the first segment and the waveform applied to the second segment may overlap at the same time as the second segment is turned on, Control so that there is a phase difference.

To this end, in the case of a power supply inverter having a structure as shown in FIG. 1, the controller 140 first controls the rectifier 120 off when the switching operation is performed from the first segment to the second segment, and the output voltage of the rectifier 120 is controlled. When the value becomes equal to or less than the set value, the first segment may be turned off, and after the second segment is turned on, the rectifier 120 may be turned on again.

In addition, in the case of the power supply inverter having the structure as shown in FIG. 2, the controller 150 controls the rectifier 220 to be turned off when the switching operation is performed from the first segment to the second segment, and turns off the DC / DC converter 230. When the output voltage of the DC / DC converter is less than or equal to the set value, the first segment is turned off, and after the second segment is turned on, the DC / DC converter 230 is turned on and the rectifier 220 is turned on. You can control it again.

In this case, the phase difference of the waveform between the first segment and the second segment may be adjusted by adjusting the set value of the output voltage of the rectifier 120 or the set value of the output voltage of the DC / DC converter 230.

5 is a flowchart illustrating a driving control method of a power feeding inverter according to an embodiment of the present invention.

In the case of the power feeding inverter having the structure as shown in FIG. 1, when the online electric vehicle is located in the first segment, the switching signal for the first segment is normally received (S510). Since the switching control thereof is as described above, a detailed description thereof will be omitted.

In the case of switching switching from the first segment to the second segment, the controller 140 first controls the rectifier 120 off (S520), and when the output voltage of the rectifier 120 falls to be lower than the set value (S530). By switching off the first segment (S540) and then turning on the second segment and turning on the rectifier 120, the switching operation is performed at the normal pressure for the second segment (S550). In this case, the on control of the second segment is preferably controlled such that the phase difference with the waveform applied to the first segment is (180-α) ° after a predetermined time at the same time as the second segment is turned on. Here, when the phase difference between the first segment and the second segment is β, α is a phase corresponding to a pulse section overlapping the first segment, and α + β = 180 °. The phase difference of the second segment with respect to the first segment may vary according to a value set for the output voltage of the rectifier 120.

6 is a flowchart illustrating a driving control method of a power feeding inverter according to another embodiment of the present invention.

In the case of the power supply inverter having the structure as shown in FIG. 2, when the online electric vehicle is located in the first segment, the switching signal for the first segment is normally received (S610). Since the switching control thereof is as described above, a detailed description thereof will be omitted.

In the case of switching switching from the first segment to the second segment, the controller 250 first controls off the rectifier 220 (S620) and off-controls the DC / DC converter 230 (S630). Thereafter, when the output voltage of the DC / DC converter 230 falls below the set value (S640), the first segment is controlled off (S650), and then the second segment is controlled on, and the DC / DC converter 230 is controlled. ) Is controlled on (S660). Next, by switching on the rectifier 120, the switching switching operation is performed at the normal pressure for the second segment (S670). In this case, the on control of the second segment is preferably controlled such that the phase difference with the waveform applied to the first segment is (180-α) ° after a predetermined time at the same time as the second segment is turned on. Here, when the phase difference between the first segment and the second segment is β, α is a phase corresponding to a pulse section overlapping the first segment, and α + β = 180 °. The phase difference of the second segment with respect to the first segment may vary according to a value set for the output voltage of the rectifier 120.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. Codes and code segments constituting the computer program may be easily inferred by those skilled in the art. Such a computer program may be stored in a computer readable storage medium and read and executed by a computer, thereby implementing embodiments of the present invention. As the storage medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.

Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms used generally, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations 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 scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims (8)

Rectifier for rectifying the input AC power;
A plurality of switches connected in series to form a leg, the plurality of legs connected in parallel, and an inverter for supplying high frequency power through a plurality of segments formed based on a common contact between the switches of the different legs; And
A controller for turning on / off the rectifier and each switch and controlling a pulse width applied to each of the segments based on the power rectified by the rectifier;
Including but not limited to:
When the control unit controls to switch from one of the plurality of segments to an adjacent segment, the control unit controls the phase difference between the waveform applied by turning the adjacent segment on and the waveform applied to the previous segment to be a predetermined phase difference. Operation control apparatus of the power supply inverter, characterized in that.
The method of claim 1,
DC / DC converter for DC / DC conversion of the power rectified by the rectifier to supply to the inverter
Operation control apparatus of the power supply inverter further comprises.
The apparatus of claim 1,
In the case of controlling to switch from the first segment to the adjacent second segment, the rectifier is turned off, and when the output voltage of the rectifier is less than or equal to a set value, the first segment is turned off and the second segment is on controlled. Operation control apparatus of the power supply inverter, characterized in that to control the rectifier on.
The method of claim 2, wherein the control unit,
In case of controlling to switch from the first segment to the adjacent second segment, the rectifier is turned off and the DC / DC converter is turned off. When the output voltage of the DC / DC converter is less than or equal to a set value, the first segment is controlled. And controlling the DC / DC converter on and controlling the rectifier on after controlling off and controlling on the second segment.
Rectifier for rectifying the input AC power; A plurality of switches connected in series to form a leg, the plurality of legs connected in parallel, and an inverter for supplying high frequency power through a plurality of segments formed based on a common contact between the switches of the different legs; And a control unit which turns on / off the rectifier and each switch, and controls a pulse width applied to each of the segments based on the power rectified by the rectifier.
Receiving the first segment switching signal when controlling to switch from a first segment to a second adjacent segment among the plurality of segments;
Controlling the rectifier off;
If the output voltage of the rectifier is less than or equal to a set value, controlling the first segment to be off; And
Controlling on the second segment and controlling on the rectifier
Operation control method of the power supply inverter comprising a.
6. The method of claim 5,
And controlling the phase difference between the waveform applied to the second segment and the waveform applied to the first segment to be a predetermined phase difference.
Rectifier for rectifying the input AC power; A DC / DC converter for DC / DC conversion of the power rectified by the rectifier to supply to the inverter; A plurality of switches connected in series to form a leg, the plurality of legs connected in parallel, and an inverter for supplying high frequency power through a plurality of segments formed based on a common contact between the switches of the different legs; And a controller for turning on / off the rectifier, the DC / DC converter, and each of the switches, and controlling a pulse width applied to each of the segments based on the power rectified by the rectifier. In the control method,
Receiving the first segment switching signal when controlling to switch from a first segment to a second adjacent segment among the plurality of segments;
Controlling the rectifier off;
Controlling off the DC / DC converter;
If the output voltage of the DC / DC converter is less than or equal to a set value, controlling off the first segment; And
Controlling the second segment on, controlling the DC / DC converter and controlling the rectifier on.
Operation control method of the power supply inverter comprising a.
8. The method of claim 7,
And controlling the phase difference between the waveform applied to the second segment and the waveform applied to the first segment to be a predetermined phase difference.

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