JP5940262B2 - Power supply circuit and pulse output circuit using the same - Google Patents

Description

  The present invention relates to a power supply circuit and a pulse output circuit using the same, and more particularly to a power supply circuit and a pulse output circuit using a switching circuit.

  2. Description of the Related Art Conventionally, there is a power supply circuit that can output a relatively high voltage DC pulse by using a capacitor (capacitor) that stores electric charges and a switching circuit. Such a power supply circuit discharges the electric charge stored in the capacitor by using a switching element, and outputs a high current with a high voltage in a short time.

  By the way, the above power supply circuit may be required to output a higher voltage pulse. In order to output a high-voltage pulse, it is necessary to use a higher withstand voltage as each circuit element constituting the power supply circuit. However, such circuit elements are special and may be difficult to obtain. For this reason, the manufacturing cost of the power supply circuit may increase, and the configuration of the power supply circuit may be complicated.

  The present invention has been made to solve such problems, and an object thereof is to provide a power supply circuit capable of outputting high-voltage power with a relatively simple configuration and a pulse output circuit using the power supply circuit. .

According to an aspect of the present invention for achieving the above object, a power supply circuit capable of outputting a voltage from the output terminal, a voltage control unit for outputting a pulse width modulation signal, respectively, based on the power input from the power supply, the voltage A plurality of switching circuits for outputting a DC voltage corresponding to the pulse width modulation signal output from the control unit, and each of the plurality of switching circuits is based on the power supplied from the power source to the input end side. A transformer unit that outputs a predetermined DC voltage from the side, a storage element that is connected in parallel to the transformer unit on the output end side of the transformer unit, and that stores electric charges based on the DC voltage output from the transformer unit, and a storage element Is provided on the output end side of the switching unit and the switching unit that operates according to the pulse width modulation signal output from the voltage control unit, and the output from the switching unit is leveled. And a smoothing unit, a plurality of switching circuits is connected in series with each other at the output end side, the transformer unit, intended interactive that can output the input to the output end side power from the input end side of When the power is input to the output terminal, the power supply circuit switches the power corresponding to the pulse width modulation signal output from the voltage control unit among the power input to the output terminal in each of the plurality of switching circuits. It is possible to operate as a load device that absorbs as a load by outputting from the input end side through the unit and the transformer .
According to another aspect of the present invention, a power supply circuit capable of outputting a pulsed voltage from an output terminal is based on a voltage control unit that outputs a pulse width modulation signal and a voltage control unit based on power input from the power supply, respectively. A plurality of switching circuits for outputting a DC voltage corresponding to the output pulse width modulation signal, and each of the plurality of switching circuits is predetermined from the output end side based on power supplied from the power source to the input end side. A transformer unit that outputs a direct current voltage, a storage element that is connected in parallel to the transformer unit on the output end side of the transformer unit, and that stores electric charges based on the DC voltage output from the transformer unit, and an output of the storage element A switching unit that operates according to a pulse width modulation signal that is input and output from the voltage control unit, and a smoothing unit that is provided on the output end side of the switching unit and smoothes the output from the switching unit The plurality of switching circuits are connected in series to each other on the output end side, and the transformer is a bidirectional type that can output the power input to the output end side from the input end side, When power is input to the output terminal, the circuit supplies power corresponding to the pulse width modulation signal output from the voltage control unit among the power input to the output terminal in each of the plurality of switching circuits. It is possible to operate as a load device that absorbs as a load by outputting from the input end side via the.
Preferably, the voltage control unit performs power flow control of the circuit using the power supply circuit by adjusting the pulse width modulation signal.

  Preferably, the voltage control unit outputs the pulse width modulation signal based on the output voltage of the power supply circuit or the voltage at a predetermined position of the external circuit connected to the power supply circuit.

  Preferably, the voltage control unit has a pulse width based on waveform information relating to a voltage output from the power supply circuit, which is stored in a storage unit provided in the power supply circuit or a storage unit provided outside the power supply circuit. Output modulation signal.

Preferably, the voltage control unit is based on waveform information relating to a voltage output from the power supply circuit, which is calculated and generated by a calculation unit provided in the power supply circuit or a calculation unit provided outside the power supply circuit. Outputs a pulse width modulation signal.
Preferably, the voltage control unit outputs the same pulse width modulation signal to each of the plurality of switching circuits, and operates the plurality of switching circuits in synchronization .

  Preferably, the pulse output circuit for applying a voltage in a pulsed manner to the load includes a DC power source, a power storage unit connected in parallel to the DC power source, and a bouncer connected in series to the load between the power storage unit and the load. The bouncer circuit is any one of the power supply circuits described above.

  Preferably, the voltage control unit of the bouncer circuit outputs a pulse width modulation signal based on the voltage applied to the load from the pulse output circuit.

  According to these inventions, the power supply circuit can add the voltage output from each switching circuit in series and output any DC voltage corresponding to the pulse width modulation signal output from the voltage control unit. Therefore, it is possible to provide a power supply circuit capable of outputting high-voltage power with a relatively simple configuration and a pulse output circuit using the power supply circuit.

It is a circuit diagram which shows the pulse output circuit in one of the embodiments of this invention. It is a timing chart explaining an example of operation of a pulse output circuit. It is a circuit diagram which shows schematic structure of a bouncer circuit. It is a circuit diagram which shows schematic structure of a switching circuit. It is a block diagram which shows schematic structure of a voltage control circuit. It is a circuit diagram which shows an example of the pulse output circuit which concerns on the modified example of this Embodiment.

  Hereinafter, a pulse output circuit using a power supply circuit according to one embodiment of the present invention will be described.

  The power supply circuit is used as a bouncer circuit of a pulse output circuit in this embodiment. The pulse output circuit is, for example, a pulse modulator for a klystron used in a linear accelerator. The pulse output circuit uses a klystron that amplifies a high-output microwave in a linear accelerator as a load, and outputs a high-pressure pulse used in the load. The power supply circuit is not limited to this application and can be used for various applications as will be described later.

  [Embodiment]

  Prior to the description of the power supply circuit (bouncer circuit), the entire configuration of the pulse output circuit according to the present embodiment will be described.

  [Overall configuration of pulse output circuit]

  FIG. 1 is a circuit diagram showing a pulse output circuit according to one embodiment of the present invention.

  As shown in FIG. 1, the pulse output circuit 1 includes a DC power source DC1, a capacitor (capacitor; an example of a power storage unit) C, a load 9, and a bouncer circuit (an example of a power circuit). The load 9 is, for example, a klystron. The number of loads 9 may be singular or plural. In addition to these components, the pulse output circuit 1 includes, for example, a protection circuit and an anode modulation unit (outputs a pulse trigger to the anode of the klystron to operate the klystron). Since these are known configurations, the illustration in FIG. 1 and their detailed description are omitted.

  The DC power supply DC1 is a switching power supply that generates a DC voltage based on, for example, a high-voltage AC power supply. The DC power source DC1 is connected to the load 9 in series.

  The capacitor C is connected in parallel to the DC power source DC1. Charge is stored in the capacitor C by applying a DC voltage from the DC power source DC1.

  The bouncer circuit 10 is connected in series with the capacitor C and the load 9 between the capacitor C and the load 9. The bouncer circuit 10 outputs a DC voltage and superimposes the DC voltage on the voltage applied from the capacitor C to the load 9. When a high voltage pulse is applied to the load 9, the bouncer circuit 10 outputs a DC voltage in accordance with the high voltage pulse so that the pulse becomes substantially flat (a voltage applied to the load 9 is not reduced). ).

  The load 9 which is a klystron requires a high pressure in a short time. The load 9 operates using a pulsed voltage when a pulse trigger is applied. The pulse output circuit 1 applies, for example, the following high voltage pulse to the load 9. That is, the high voltage pulse is a predetermined voltage of about 70 kV, and the pulse current is about 200A to 300A. The pulse width (voltage application time) is, for example, about 2 ms to 3 ms. The width of the conventional pulse is, for example, 1 ms to 2 ms, which can be said to be a relatively long pulse. The high-pressure pulse is applied to the load 9 at, for example, 5 Hz (every 200 ms).

  An allowable amount of voltage drop from the start of pulse output so that the klystron can generate a microwave having an appropriate phase is, for example, about 1 kV. However, when a high voltage pulse is output as described above, the amount by which the voltage of the capacitor C is reduced is much larger than the allowable amount. For this reason, if the bouncer circuit 10 is not used, there is a possibility that normal operation of the klystron cannot be expected. Therefore, by using the correction voltage from the bouncer circuit 10, the influence of the voltage drop of the pulse output circuit falls within an allowable amount.

  FIG. 2 is a timing chart for explaining an example of the operation of the pulse output circuit 1.

  2, the application timing of the pulse trigger to the load 9, the voltage of the capacitor C, the output voltage of the bouncer circuit 10, and the current flowing through the load 9 are shown in order from the top. As shown in FIG. 2, the pulse trigger is turned on in a period from time t1 to time t1 'and in a period from time t2 to time t2'. Each period from time t1 to time t1 'and from time t2 to time t2' is, for example, 2.5 ms. Further, the period from time t1 to time t2 is, for example, 200 ms.

  In the present embodiment, the voltage of the capacitor C is always kept at a high voltage of about 70 kV. That is, a high voltage is always applied to the load 9 including a period in which the load 9 hardly uses electric power. In this sense, it can be said that the pulse output circuit 1 applies a substantially constant voltage to the load 9. The load 9 consumes power when the pulse trigger is on. That is, the load 9 consumes pulse power. In this sense, it can be said that the pulse output circuit 1 applies a voltage in a pulsed manner to the load 9 when the pulse trigger is on. When the pulse trigger is turned on at time t1 and the application of the voltage to the load 9 is started, the voltage of the capacitor C decreases as the charge of the capacitor C decreases. When the application of the voltage to the load 9 is completed at time t1 ', the capacitor C is charged by the DC power source DC1, and the voltage of the capacitor C gradually increases.

  Here, the bouncer circuit 10 outputs a DC voltage during each period from time t1 to time t1 'and from time t2 to time t2'. The DC voltage output from the bouncer circuit 10 gradually increases as the voltage of the capacitor C decreases until the pulse output period ends. The DC voltage is output in the range of about 0V to 15kV, for example. A flat pulse voltage is supplied to the load 9 by superimposing the voltage based on the electric charge discharged from the capacitor C and the voltage output from the bouncer circuit 10.

  Next, the configuration of the bouncer circuit 10 will be described.

  [Configuration of Bouncer Circuit 10]

  FIG. 3 is a circuit diagram illustrating a schematic configuration of the bouncer circuit 10.

  As shown in FIG. 3, the bouncer circuit 10 includes, for example, 15 switching circuits 20a, 20b,..., 20o (hereinafter, these may be referred to as switching circuits 20 without being distinguished from each other), and AC / DC. It has a converter circuit 60, a voltage control circuit (an example of a voltage control unit) 70, and a control unit 90. The bouncer circuit 10 can output a DC voltage from the output terminal 10a. The bouncer circuit 10 can output a DC voltage in a pulse form.

  The AC / DC converter circuit 60 is connected to, for example, a three-phase 200V AC power supply AC1. The AC / DC converter circuit 60 converts the alternating voltage supplied from the alternating current power supply AC <b> 1 into direct current and outputs the direct current to each switching circuit 20. Although AC power supply AC1 is a power supply provided separately from DC power supply DC1, it is not restricted to this.

  FIG. 4 is a circuit diagram showing a schematic configuration of the switching circuit 20.

  Referring to FIG. 4, the switching circuit 20 includes a transformer 21, a capacitor (an example of a storage element) C11, a switching amplifier (an example of a switching unit) 23, a smoothing inductor L2, and a smoothing capacitor C2. doing.

  The output of the AC / DC converter circuit 60 is input to the transformer unit 21 in each switching circuit 20. The transformer 21 is a DC / DC converter. The transformer unit 21 is configured by, for example, an insulating transformer or a diode bridge provided on the secondary side of the insulating transformer. When DC power is input from the AC power supply AC1 via the AC / DC converter circuit 60, the transformer unit 21 transforms the voltage to be high and outputs a predetermined DC voltage. In each switching circuit 20, the DC voltage output from the transformer 21 may be the same or different.

  The capacitor C11 is, for example, an electrolytic capacitor. The capacitor C11 is connected in parallel to the transformer unit 21. Capacitor C11 accumulates the electric charge output from bouncer circuit 10 at a predetermined timing (in this embodiment, the timing corresponding to the output timing of the high-voltage pulse of pulse output circuit 1) until it is output. . Thereby, a pulsed DC voltage can be output from the switching circuit 20.

  The switching amplifier 23 has a switching element 23a. The output of the transformer 21 is input to the switching amplifier 23. The switching amplifier 23 outputs the power output from the transformer 21, that is, the power output from the capacitor C11, in accordance with the on / off operation of the switching element 23a.

  In the present embodiment, the switching element 23a opens and closes according to a pulse width modulation (PWM) signal output from the voltage control circuit 70 as will be described later. Thereby, the switching amplifier 23 outputs a voltage corresponding to the pulse width modulation signal based on the DC voltage input from the transformer 21.

  A smoothing inductor L <b> 2 connected in series to the switching amplifier 23 is provided on the output line on the high voltage side of the switching amplifier 23, which is subsequent to the switching amplifier 23. A smoothing capacitor C2 is connected between the output line of the smoothing inductor L2 (line connected to the output terminal T1) and the output line on the low voltage side of the switching amplifier 23 (line connected to the output terminal T2). In other words, the smoothing inductor L <b> 2 and the smoothing capacitor C <b> 2 are provided on the output line closer to the output terminals T <b> 1 and T <b> 2 than the switching amplifier 23. The smoothing inductor L2 and the smoothing capacitor C2 form a smoothing unit that smoothes the DC voltage output from the switching amplifier 23. The DC voltage output from the switching amplifier 23 is smoothed by the smoothing capacitor C2 and the smoothing inductor L2, and is output from the output terminals T1 and T2.

  As shown in FIG. 3, the plurality of switching circuits 20 are connected to the AC / DC converter circuit 60 in parallel with each other. That is, the plurality of switching circuits 20 are connected in parallel to each other with respect to the AC / DC converter circuit 60 and the AC power supply AC1 serving as the power supply. Each switching circuit 20 outputs a DC voltage based on the power output from the AC / DC converter circuit 60. Each switching circuit 20 is configured to be able to output a DC voltage up to about 1 kV.

  Moreover, in this Embodiment, the some switching circuit 20 is mutually connected in series by the output terminal T1, T2 side so that those outputs may be piled up. The output terminal T1 (shown in FIG. 4) on the high voltage side of each switching circuit 20 is connected to the output terminal T2 (shown in FIG. 4) on the low voltage side of the switching circuit 20 in the upper stage. The voltage of the output terminal T1 on the high voltage side of the lowermost switching circuit 20o that is grounded is about 1 kV when it is high. When the output terminal T1 on the high voltage side of the next switching circuit (not shown) connected in series is about 2 kV, and the output terminal T1 on the high voltage side of the fifteenth switching circuit 20a at the top is high. Is about 15 kV. Among the plurality of switching circuits 20, a DC voltage at the output terminal T1 on the high voltage side of the uppermost switching circuit 20a is output from the output terminal 10a of the bouncer circuit 10. Since each switching circuit 20 can output a DC voltage in the range of about 0V to 1kV, the bouncer circuit 10 can be set to 0V to 15kV by connecting the switching circuits 20a, ..., 20o in series and adding the output voltages. DC voltage can be output within a range.

  As shown in FIG. 3, the control unit 90 is configured using, for example, a microcomputer. The control unit 90 includes a CPU (an example of a calculation unit) 91 and a memory (an example of a storage unit) 92. The memory 92 stores waveform information related to the voltage output from the bouncer circuit 10. The control unit 90 generates a reference waveform signal based on the waveform information. The control unit 90 transmits the generated reference waveform signal to the voltage control circuit 70.

  The voltage control circuit 70 generates a pulse width modulation signal as described later, and outputs the generated pulse width modulation signal to each switching circuit 20. The pulse width modulation signal is sent to the switching circuit 20 as a light ignition signal. When the pulse width modulation signal is sent to the switching circuit 20, each switching circuit 20 operates according to the pulse width modulation signal and outputs a DC voltage according to the pulse width modulation signal. Each switching circuit 20 operates based on the same pulse width modulation signal. That is, the voltage control circuit 70 synchronizes and operates the plurality of switching circuits 20 as a unit, so that the overall operation result of the plurality of switching circuits 20 is output from the output terminal of the uppermost one of the plurality of switching circuits 20. DC voltage output can be obtained.

  The pulse width modulation signal is basically output as follows. That is, the duty ratio of the pulse width modulation signal gradually increases so that the DC voltage output from the bouncer circuit 10 gradually increases from the start to the end of application of the high-voltage pulse. As the voltage of the capacitor C decreases, the duty ratio of the pulse width modulation signal is changed, so that a DC voltage in the form of a triangular pulse wave is output from the bouncer circuit 10.

  The voltage control circuit 70 receives the reference waveform signal transmitted from the control unit 90 and the monitor voltage. In the present embodiment, a voltage corresponding to the output voltage of the bouncer circuit 10 is input as the monitor voltage. That is, a voltage obtained by dividing the voltage at the output terminal of the uppermost switching circuit 20a by the resistor R1 and the resistor R2 is input to the voltage control circuit 70 as a monitor voltage.

  The voltage control circuit 70 generates a pulse width modulation signal based on the reference waveform signal. In other words, the voltage control circuit 70 outputs a pulse width modulation signal based on the waveform information stored in the memory 92. The voltage control circuit 70 also generates a pulse width modulation signal based on the monitor voltage. Thereby, the voltage control circuit 70 performs feedback control of the DC voltage output from the bouncer circuit 10.

  FIG. 5 is a block diagram showing a schematic configuration of the voltage control circuit 70.

  The voltage control circuit 70 includes a comparison unit 71, an A / D conversion unit 73, a PWM modulation unit 75, a signal output unit 77, and the like.

  The reference waveform signal transmitted from the control unit 90 is input to the comparison unit 71. Further, a signal based on the monitor voltage is input to the comparison unit 71. When the monitor voltage is input to the comparison unit 71, a digital signal based on the monitor voltage is generated and output by the A / D conversion unit 73. The comparison unit 71 receives a digital signal output from the A / D conversion unit 73 based on the monitor voltage.

  The comparison unit 71 compares the input signals and outputs a signal to the PWM modulation unit 75 based on them. The PWM modulation unit 75 performs pulse width modulation based on the input signal and sends a pulse width modulation signal to the signal output unit 77. The signal output unit 77 sends the pulse width modulation signal sent from the PWM modulation unit 75 to each switching circuit 20 as a light ignition signal. Thus, each switching circuit 20 operates based on the pulse width modulation signal, and a DC voltage corresponding to the pulse width modulation signal is output from the bouncer circuit 10.

  [Description of variation of pulse output circuit]

  The pulse output circuit may be configured to apply a negative voltage to the load 9.

  FIG. 6 is a circuit diagram illustrating an example of a pulse output circuit 101 according to a variation of the present embodiment.

  The pulse output circuit 101 applies a negative pulse voltage to the load 9 which is a klystron. As shown in FIG. 6, the pulse output circuit 101 includes a DC power supply DC1a, a capacitor C, a protection circuit 105, an anode modulation circuit 106, a bouncer circuit 110, and a load 9.

  For example, an AC power supply is input to the DC power supply DC1a. The DC power source DC1a outputs a DC voltage applied to the load 9 based on the AC power source, and accumulates electric charges in a capacitor C connected in parallel to the DC power source DC1a. A protection circuit 105 is connected between the capacitor C and the load 9 in parallel with the capacitor C. The protection circuit 105 includes, for example, a spark gap switch.

  The output line on the high voltage side of the pulse output circuit 101 is grounded. The output line on the high voltage side of the pulse output circuit 101 is 0 V, and the output line on the low voltage side is, for example, about −70 kV. The bouncer circuit 110 is connected in series with the capacitor C and the load 9 between the ground point and the line on the high voltage side of the capacitor C. Further, the anode modulation circuit 106 is connected to an output line on the high voltage side. The anode modulation circuit 106 is provided with an anode pulser 106 a that generates a pulse trigger for operating the load 9. The anode pulser 106a generates a pulse trigger at a predetermined timing using the voltage of the output line on the high voltage side, and sends the pulse trigger to each load 9. As a result, each load 9 is driven at a predetermined timing, and the voltage supplied from the pulse output circuit 101 is consumed in pulses. That is, a high voltage pulse is applied to each load 9 in accordance with the pulse trigger.

  In the pulse output circuit 101 configured to apply a negative voltage to the load 9 as described above, the bouncer circuit 110 includes a switching circuit that operates based on the pulse width modulation signal, as in the above-described embodiment. Connected in series and stacked. The bouncer circuit 110 operates the switching circuit according to the pulse width modulation signal, so that the negative DC voltage for correcting the voltage drop of the capacitor C is matched with the timing when the high voltage pulse is output to the load 9. Output. The voltage based on the electric charge discharged from the capacitor C and the voltage output from the bouncer circuit 10 are superimposed, whereby a flat pulse voltage is supplied to the load 9.

  [Description of variant]

  The controller 90 may be provided exclusively for the bouncer circuit 10, or may be a controller that controls other circuits and devices. The controller 90 may be provided outside the bouncer circuit 10 or outside the pulse output circuit 1. The waveform information may be stored in the voltage control circuit 70, and a signal corresponding to the waveform information may be input to the comparison unit 71 at an appropriate timing.

  The control unit 90 may generate waveform information by performing calculation by the CPU 91 during operation of the bouncer circuit 10, and may transmit a signal to the voltage control circuit 70 based on the generated waveform information. The waveform information can be generated based on, for example, various preset parameters and time information (timing information). The voltage control circuit 70 may be input with waveform information transmitted from an external computer connected to the bouncer circuit 10 as the control unit 90. Thereby, the operation of the bouncer circuit 10 can be changed as appropriate.

  A voltage based on the voltage applied from the pulse output circuit 1 to the load 9 may be input to the voltage control circuit 70 as a monitor voltage. That is, the voltage control circuit 70 is output from the bouncer circuit 10 based on a voltage obtained by superimposing the voltage output from the bouncer circuit 10 and the voltage based on the capacitor C so that the voltage is maintained at a predetermined voltage. The voltage may be feedback controlled. In this way, by configuring the large loop active correction circuit so that the voltage after the correction addition by the bouncer circuit 10 becomes substantially constant, the voltage applied to the load 9 can be stabilized more reliably.

  The monitor voltage may not be input to the voltage control circuit 70. That is, the voltage control circuit 70 may send out a predetermined pulse width modulation signal at a predetermined timing without performing feedback control so that the bouncer circuit 10 always outputs the same DC voltage.

  [Effects on the bouncer circuit 10]

  As described above, in the present embodiment, the bouncer circuit 10 has a configuration as a power supply circuit that can output a pulsed DC voltage in accordance with a pulse width modulation signal. When a voltage is output from each switching circuit 20, the voltage of the capacitor C11 decreases with the output. However, by changing the duty ratio of the pulse width modulation signal output from the voltage control circuit 70 as the voltage is output, the height of the voltage output from each switching circuit 20 is kept substantially constant. In other words, even if the voltage of the capacitor C11 decreases, the switching amplifier 23 can correct this and output it. As a result, it is possible to output a stable DC voltage from the power supply circuit while using a relatively small capacitor C11 without using a special capacitor having a large capacity.

  Such a power supply circuit includes the switching circuit 20 including the switching element 23a and can be configured in a small size. The power supply circuit is configured such that a plurality of switching circuits 20 are stacked in series with each other and a relatively high DC voltage can be output as one power supply circuit. Therefore, a relatively common element can be used as each element included in each switching circuit 20. Therefore, the configuration of the power supply circuit can be made relatively simple. Since each switching circuit 20 does not need to output a very large voltage, it can be configured using small elements. For example, as the capacitor C11, a commercially available product having a capacity not so large can be used. Thereby, the manufacturing cost of the bouncer circuit 10 can be reduced, and the overall size can be prevented from becoming large.

  In the present embodiment, the voltage output from the bouncer circuit 10 is feedback-controlled by the voltage control circuit 70 and always has an appropriate magnitude. Therefore, the voltage applied to the load 9 can be further stabilized. Further, the voltage control circuit 70 causes the bouncer circuit 10 to output a pulsed DC voltage based on the waveform information stored in the memory 92 of the control unit 90. Therefore, by adjusting the waveform information, the bouncer circuit 10 having the same hardware configuration can be used for pulse output circuits having various configurations with different voltages and pulse widths of the high voltage pulses to be output. For example, even if the waveform of a high-voltage pulse that needs to be output from the bouncer circuit 10 is changed due to a subsequent configuration change of the pulse output circuit 1, it is possible to easily cope with this by adjusting the waveform information. Can do. As a method for inputting a signal corresponding to the waveform information to the voltage control circuit 70, various methods can be adopted as described above. Therefore, the bouncer circuit 10 can be made more versatile.

  [Effects related to pulse output circuit 1]

  Prior to describing the effects of the pulse output circuit 1 in the present embodiment, the conventional pulse output circuit will be described as follows.

  That is, a high-pressure pulse is applied to, for example, a klystron used in a linear accelerator. The high voltage pulse applied to such a load is output by a pulse output circuit using a large capacitor. In such a pulse output circuit, the capacitor voltage is reduced by discharging the capacitor charge from the start of pulse output. As a pulse output circuit, there has been known a pulse output circuit provided with a bouncer circuit using an LC resonance circuit in order to reduce the influence of a voltage drop of a capacitor.

  In the apparatus using the bouncer circuit by the LC resonance circuit, although the voltage drop of the capacitor is compensated to some extent by the bouncer circuit, there is a limit in making the pulse voltage constant. That is, in the bouncer circuit, an LC resonance circuit generates a trigonometric wave-shaped resonance voltage. In order to continue to compensate the voltage for a long time by superimposing the resonance voltage of the bouncer circuit against the voltage drop due to the decrease in the charge of the capacitor, both L and C of the LC resonance become large, and the DC superposition The pulse transformer for this will also become large.

  In addition, the bouncer circuit using the LC resonance circuit outputs a voltage for compensating the high voltage pulse, and thus becomes relatively large. For this reason, there is a limit in reducing the size of the pulse output circuit.

  In order to reduce the influence of the voltage drop of the capacitor, in addition to a method of providing a bouncer circuit, a method of using a larger capacitor can be considered. However, when a large capacitor is used, the space occupied by the capacitor increases. Depending on the application, the pulse output circuit may be used in a narrow space such as the ground, which is difficult to install for a large device, for example. Therefore, there is a case where it is strongly desired to reduce the size of the pulse output circuit. In this case, a large capacitor cannot be used.

  In the present embodiment, the pulse output circuit 1 is configured using the bouncer circuit 10 configured to be operable as a power supply circuit as described above in order to deal with such problems of the conventional pulse output circuit. Thus, the following effects can be obtained.

  That is, the bouncer circuit 10 can output a DC voltage for compensating the voltage applied to the load 9 in accordance with the pulse width modulation signal output from the voltage control circuit 70. Therefore, even if the voltage applied to the load 9 decreases the charge accumulated in the capacitor C and the voltage based on the charge accumulated in the capacitor C decreases, the bouncer has a waveform that matches the decrease. A DC voltage can be output from the circuit 10. Therefore, the waveform of the high voltage pulse applied to the load 9 can be made as flat as possible, and the voltage output from the pulse output circuit 1 can be made more stable. Even when the pulse width is relatively long, a voltage for compensation against the voltage drop of the capacitor C can be output from the bouncer circuit 10 accordingly, so that a stable high voltage can be applied to the load 9.

  At this time, a compensation voltage for the voltage drop of the capacitor C is output using energy stored in a relatively small capacitor C11 in each switching circuit 20 in the bouncer circuit 10. Therefore, since the bouncer circuit 10 can be configured using a small common element, the manufacturing cost of the pulse output circuit 1 can be made relatively low. The bouncer circuit 10 can be configured to be relatively small. Even if a relatively small capacitor C is used for the pulse output circuit 1, the bouncer circuit 10 can suppress the influence of the voltage drop of the capacitor. Therefore, the pulse output circuit 1 can be reduced in size as a whole, and can be installed in a narrow place.

  [Explanation of power circuit usage / operation examples]

  In the above embodiment, the example in which the power supply circuit is used as the bouncer circuit 10 of the pulse output circuit 1 has been described, but the application of the power supply circuit is not limited to this. A power supply circuit having a configuration similar to that of the bouncer circuit 10 can be widely used for power supply devices of various circuits. That is, the power supply circuit can output a high-voltage DC voltage having an arbitrary waveform of, for example, 0 V to 15 kV, based on the pulse width modulation signal, using the power supplied from the power supply. Since the power supply circuit has a configuration in which a plurality of switching circuits 20 are stacked, high-voltage power can be output with a relatively simple configuration.

  Here, for example, a monitor voltage based on the output voltage of the power supply circuit or a monitor voltage based on a voltage at a predetermined position of the external circuit connected to the power supply circuit is input to the voltage control circuit 70, and the pulse width is based on the monitor voltage. It may be configured to output a modulation signal. Thereby, feedback control of the output voltage of a power supply circuit can be carried out, and a power supply circuit can be operated more stably.

  The power supply circuit may also be configured to operate as a load device. By using a transformer circuit having a bidirectional circuit as a transformer circuit provided in the power supply circuit, the power supply circuit can be configured to operate as a load device. In this case, the power supply circuit can absorb power from the output end side and output it to the power supply on the input side through a switching amplifier, a transformer, or the like.

  For example, a case where the power supply circuit has the same configuration as the bouncer circuit 10 will be described. At this time, by making the AC / DC converter circuit 60, the transformer 21 and the like bidirectional, the power circuit can be made operable as a load device. The power supply circuit can absorb the input power from the output terminal 10a side. The absorbed power is output to the AC power supply AC <b> 1 on the input side via the switching amplifier 23 and the transformer unit 21 and via the AC / DC converter circuit 60 in each switching circuit 20.

  When the power supply circuit is used to operate as a load device in this way, the power that can be absorbed as a load can be changed relatively quickly by adjusting the pulse width modulation signal from the voltage control circuit. Therefore, the power supply circuit can be used as a device for performing power flow control that can operate at a high speed corresponding to a relatively high voltage.

  [Others]

  The number of switching circuits provided in the bouncer circuit (power supply circuit) and the magnitude of the voltage that can be output per one of them are not limited to the above. Many more switching circuits may be connected in series.

  The configuration of the pulse output circuit is not limited to the above, and other elements or the like constituting the circuit may be provided. For example, there may be a plurality of large capacitors for the pulse output circuit and capacitors used for the switching circuit. Further, in place of the capacitor of the pulse output circuit and the capacitor of the switching circuit, other types of power storage elements and devices may be used. In the above embodiment, the configuration of the pulse output circuit is shown as simplified as possible for easy understanding.

  The voltage value of the high voltage pulse and the time of the pulse width output from the bouncer circuit (power supply circuit) and the pulse output circuit are not limited to the above, and may be set as appropriate according to the application.

  The load to which the voltage from the pulse output circuit is supplied is not limited to the klystron. The pulse output circuit can also be applied to other types of loads driven by application of high-voltage pulses.

  The pulse output circuit shown in the above embodiment applies a stable high voltage to the load. That is, this pulse output circuit can apply a high voltage pulse to the load when the load consumes electric power at a pulse-like timing. However, the configuration of the pulse output circuit is not limited to this. That is, a stable high-voltage pulse voltage may be applied to the load only during pulse output, and the voltage from the pulse output circuit may not be applied to the load during other periods.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1,101 Pulse output circuit 9 Load 10,110 Bouncer circuit (an example of a power supply circuit)
10a Output terminal of bouncer circuit (an example of power circuit output terminal)
20, 20a, ..., 20o Switching circuit 21 Transformer 23 Switching amplifier (an example of a switching unit)
23a Switching element 60 AC / DC converter circuit 70 Voltage control circuit (an example of a voltage control unit)
71 Comparison Unit 73 A / D Conversion Unit 75 PWM Modulation Unit 77 Signal Output Unit 90 Control Unit 91 CPU (Example of Calculation Unit)
92 memory (an example of a storage unit)
AC1 AC power supply C capacitor (an example of a power storage unit)
C2 smoothing capacitor C11 capacitor (an example of a storage element)
DC1, DC1a DC power supply L2 Smoothing inductor

Claims (9)

The power supply circuit capable of outputting a voltage from the output terminal,
A voltage controller that outputs a pulse width modulation signal;
Each comprising a plurality of switching circuits that output a DC voltage corresponding to the pulse width modulation signal output from the voltage control unit, based on the power input from the power supply,
Each of the plurality of switching circuits is
Based on the power supplied from the power source to the input end side, a transformer that outputs a predetermined DC voltage from the output end side;
A power storage element that is connected in parallel to the transformer unit on the output end side of the transformer unit, and that stores electric charges based on a DC voltage output from the transformer unit;
A switching unit that receives the output of the storage element and operates according to a pulse width modulation signal output from the voltage control unit;
A smoothing unit that is provided on the output end side of the switching unit and smoothes the output from the switching unit;
The plurality of switching circuits are connected in series with each other on the output end side ,
The transformer is a bidirectional type that can output power input to the output end side from the input end side,
When the power is input to the output terminal, the power supply circuit supplies power corresponding to the pulse width modulation signal output from the voltage control unit among the power input to the output terminal to each of the plurality of switching circuits. A power supply circuit that is operable as a load device that absorbs a load by being output from the input end side through the switching unit and the transformer unit . A power supply circuit that can output a pulsed voltage from the output end,
A voltage controller that outputs a pulse width modulation signal;
Each comprising a plurality of switching circuits that output a DC voltage corresponding to the pulse width modulation signal output from the voltage control unit, based on the power input from the power supply,
Each of the plurality of switching circuits is
Based on the power supplied from the power source to the input end side, a transformer that outputs a predetermined DC voltage from the output end side;
A power storage element that is connected in parallel to the transformer unit on the output end side of the transformer unit, and that stores electric charges based on a DC voltage output from the transformer unit;
A switching unit that receives the output of the storage element and operates according to a pulse width modulation signal output from the voltage control unit;
A smoothing unit that is provided on the output end side of the switching unit and smoothes the output from the switching unit;
The plurality of switching circuits are connected in series with each other on the output end side,
The transformer is a bidirectional type that can output power input to the output end side from the input end side,
When the power is input to the output terminal, the power supply circuit supplies power corresponding to the pulse width modulation signal output from the voltage control unit among the power input to the output terminal to each of the plurality of switching circuits. the switching unit and via the transformer to absorb as a load by the output from the input end side, is operable as a load device, the power supply circuit in. The voltage control unit, said by adjusting the pulse width modulated signal, performs power flow control of the circuit using the power supply circuit, a power supply circuit according to claim 1 or 2. 4. The voltage control unit according to claim 1, wherein the voltage control unit outputs the pulse width modulation signal based on an output voltage of the power supply circuit or a voltage at a predetermined position of an external circuit connected to the power supply circuit . 5. The power supply circuit described in 1. The voltage control unit is stored in a storage unit provided in the power supply circuit or a storage unit provided outside the power supply circuit, based on waveform information regarding the voltage output from the power supply circuit, The power supply circuit according to claim 1, wherein the power supply circuit outputs the pulse width modulation signal. The voltage control unit is based on waveform information relating to a voltage output from the power supply circuit, which is calculated and generated by a calculation unit provided in the power supply circuit or a calculation unit provided outside the power supply circuit. The power supply circuit according to claim 1, wherein the power supply circuit outputs the pulse width modulation signal. The voltage control section outputs the same the pulse width modulation signal to each of the plurality of switching circuits, wherein to the plurality of operating in synchronization with the switching circuit, according to any one of claims 1 to 6 Power supply circuit. A pulse output circuit for applying a voltage in a pulsed manner to a load,
DC power supply,
A power storage unit connected in parallel to the DC power source;
A bouncer circuit connected in series to the load between the power storage unit and the load;
The said bouncer circuit is a pulse output circuit which is a power supply circuit in any one of Claim 1 to 7.   The pulse output circuit according to claim 8, wherein the voltage control unit of the bouncer circuit outputs the pulse width modulation signal based on a voltage applied from the pulse output circuit to the load.

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