JP2007049900A - Controller of single-pulse single-phase bridge voltage self-exciting converter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller of a single-pulse single-phase bridge voltage self-exciting converter for superimposing a DC component on an AC output voltage from a single-phase bridge voltage self-exciting converter without a change in an effective value and a phase of a fundamental wave component. <P>SOLUTION: In the controller of the single-pulse single-phase bridge voltage self-exciting converter, a plurality of self arc-extinguishing devices are bridge-connected, an AC terminal is connected to a power system or a load, and a DC terminal is connected to a DC capacitor. The controller is provided with a means for generating gate pulses for the self arc-extinguishing devices, and a means for inhibiting an on-state and an off-state from being newly changed for a fixed period when the on-state and the off-state of the self arc-extinguishing devices are changed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a one-pulse single-phase bridge voltage source self-excited conversion comprising a plurality of self-extinguishing devices connected in a bridge, an AC terminal connected to a power system or a load, and a DC terminal connected to a DC capacitor. In particular, a one-pulse single-phase bridge voltage type that improves the gate pattern generation method of each self-extinguishing device and can prevent the self-extinguishing device from being damaged by increasing the number of switching operations. The present invention relates to a control device for a self-excited converter.

  Conventionally, as an example of a one-pulse single-phase bridge voltage type self-excited converter, there is a converter as described in Non-Patent Document 1, for example.

    FIG. 24 is a circuit diagram showing a configuration example of this type of conventional one-pulse single-phase bridge voltage source self-excited converter.

    In FIG. 24, a 1-pulse single-phase bridge voltage source self-excited converter includes a plurality of self-extinguishing devices 1A, 1B, 1C, and 1D in which reflux diodes 2A, 2B, 2C, and 2D are connected in antiparallel. The AC terminal is connected to the power system or the load 4, and the DC terminal is connected to the DC capacitor 3.

   In FIG. 24, the symbols of the self-extinguishing devices 1A, 1B, 1C, and 1D are IGBTs. However, this is not limited to IGBTs, and self-extinguishing capabilities such as GTOs, bipolar transistors, and MOSFETs. Any device can be used.

  By using three such one-pulse single-phase bridge voltage type self-excited converters, a three-phase converter can be configured.

    In addition, it is possible to reduce harmonics by multiplexing one-pulse single-phase bridge voltage type self-excited converters.

  As described above, the application range of the single-pulse single-phase bridge voltage source self-excited converter is wide, and specifically, it can be applied to DC power transmission, reactive power compensator, and frequency converter.

    FIG. 25 is a waveform diagram showing an example of an AC output voltage (one pulse voltage) output to the AC terminal and a gate pattern when the one-pulse single-phase bridge voltage type self-excited converter is operated in one pulse.

    In FIG. 25, the first stage from the top is the gate pattern waveform of the self-extinguishing device of the U arm, the second stage is the gate pattern waveform of the self-extinguishing device of the X arm, and the third stage is the self-extinguishing of the V arm. The gate pattern waveform of the shape device, the fourth stage is the gate pattern waveform of the self-extinguishing device of the Y arm, and the fifth stage is the AC terminal output voltage waveform Vout.

    Note that θ is the fundamental wave phase of the AC output voltage and is based on cosine.

The fundamental wave effective value Vout of the AC output voltage is given by the following equation.

Vout: fundamental value of AC output voltage [V]
VDC: DC voltage [V]
α: AC output voltage pulse width [rad]
“Semiconductor Power Conversion Circuit” The Institute of Electrical Engineers: Semiconductor Power Conversion Method Research Committee (Ohm)

  By the way, in the one-pulse single-phase bridge voltage type self-excited converter as described above, a method for preventing an increase in the number of switching times for preventing the self-extinguishing type device from being damaged has not been proposed at present.

      An object of the present invention is to provide a control apparatus for a single-pulse single-phase bridge voltage source self-excited converter capable of preventing damage to a self-extinguishing device due to an increase in the number of switching after a switching state is changed. It is in.

  In order to achieve the above object, in the invention corresponding to claim 1, the means for generating the gate pulse of each self-extinguishing device and the constant on-off state of each self-extinguishing device are changed. Means for prohibiting the on and off states from changing again during this period.

    Therefore, in the control device for a single pulse single-phase bridge voltage source self-excited converter according to the first aspect of the present invention, when the on / off state of each self-extinguishing device changes, it is turned on again for a certain period. By prohibiting the OFF state from changing, it is possible to prevent the self-extinguishing device from being damaged due to an increase in the number of switching after the switching state is changed.

  As described above, according to the control device of the pulse single-phase bridge voltage source self-excited converter of the present invention, it is possible to prevent the self-extinguishing device from being damaged due to an increase in the number of switching after the switching state is changed. It becomes possible.

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

    (First Embodiment) FIG. 1 is a block diagram showing a configuration example of a control device for a 1-pulse single-phase bridge voltage source self-excited converter according to this embodiment.

    That is, as shown in FIG. 1, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment includes a pulse width calculation device 5, a phase conversion device 7A, a phase conversion device 7B, and a gate. It comprises a pattern generator 8A, a gate pattern generator 8B, an adder 9, a subtractor 10, an inverter 11A, an inverter 11B, a proportional device 28, and a proportional device 29, and a desired fundamental wave. An AC output voltage (one pulse voltage) having an effective value and a phase is output from the AC terminal.

    The pulse width calculation device 5 calculates a desired pulse width from the fundamental wave effective value of the AC output voltage (one pulse voltage) output to the AC terminal of the one-pulse single-phase bridge voltage type self-excited converter.

    The proportional device 28 multiplies the pulse width of the AC output voltage calculated by the pulse width calculation device 5 by the gain A and outputs the result.

    The proportional device 29 multiplies the pulse width of the AC output voltage calculated by the pulse width calculation device 5 by the gain (1-A) and outputs the result.

    Here, A is a value of 0 or more and 1 or less.

    The adder 9 adds the output from the proportional device 28 to the phase of the AC output voltage.

    The subtracter 10 subtracts the output from the proportional device 29 from the phase of the AC output voltage.

    The phase conversion device 7A receives the output from the adder 9, converts the input phase into a range from 0 to 2π, and calculates the arm phase command value.

    The phase conversion device 7B receives the output from the subtractor 10, converts the input phase into a range from 0 to 2π, and calculates the arm phase command value.

    The gate pattern generator 8A receives the output from the phase converter 7A as an input, and outputs a gate pattern of 1 when the input is smaller than 0 and smaller than π, and a gate pattern of 0 when smaller than π and smaller than 2π. Is output.

    The gate pattern generator 8B receives the output from the phase converter 7B as an input, outputs a gate pattern of 1 when the input is smaller than 0 and smaller than π, and outputs a gate pattern of 0 when smaller than π and smaller than 2π. Is output.

    The inverter 11A receives the output from the gate pattern generator 8A as an input, inverts the input, and outputs it.

    The inverter 11B receives the output from the gate pattern generator 8B as an input, inverts the input, and outputs it.

    That is, the control device for the single-pulse single-phase bridge voltage source self-excited converter according to the present embodiment adds a part of the pulse width of the AC output voltage calculated by the pulse width calculation device 5 to the phase of the AC output voltage. The desired pulse width is calculated by subtracting the remaining pulse width after subtraction from the phase of the AC output voltage, calculating the phase command value of each arm, and generating the gate pattern of the self-extinguishing device for each arm. AC output voltage (1 pulse voltage) of the fundamental wave effective value and phase is output from the AC terminal.

    Next, the operation of the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIG.

    FIG. 2 is a waveform diagram of an AC output voltage and a gate pattern showing the operation of the present embodiment.

    In FIG. 1, the pulse width calculation device 5 calculates a desired pulse width α from the fundamental wave effective value Vout of the AC output voltage output to the AC terminal of the 1-pulse single-phase bridge voltage type self-excited converter.

    In the proportional device 28, the gain A is multiplied by the pulse width α of the AC output voltage from the pulse width calculation device 5.

    The proportional device 29 multiplies the pulse width α of the AC output voltage from the pulse width calculation device 5 by the gain (1-A).

    The adder 9 adds the output from the proportional device 28 to the phase θ of the AC output voltage.

    The subtracter 10 subtracts the output from the proportional device 29 from the phase θ of the AC output voltage.

    In the phase converter 7A, the phase input from the adder 9 is converted into a range from 0 to 2π to calculate the arm phase command value.

    In the phase conversion device 7B, the phase input from the subtractor 10 is converted into a range from 0 to 2π to calculate the arm phase command value.

    For example, when 3π is input to the phase conversion devices 7A and 7B, the output is π.

    The gate pattern generation device 8A outputs a gate pattern of 1 when the input from the phase conversion device 7A is smaller than 0 and smaller than π, and outputs a gate pattern of 0 when smaller than π and smaller than 2π (U-arm). Gate pattern).

    The gate pattern generator 8B outputs a gate pattern of 1 when the input from the phase converter 7B is less than 0 and less than π, and outputs a gate pattern of 0 when it is less than π and less than 2π (V-arm). Gate pattern).

    In the inverter 11A, the output from the gate pattern generator 8A is input, and the input is inverted and output (X arm gate pattern).

    In the inverter 11B, the output from the gate pattern generator 8B is input, and the input is inverted and output (Y arm gate pattern).

    The self-extinguishing device is turned on when the gate pattern is 1 and turned off when the gate pattern is 0.

    FIG. 2 shows the waveform of the AC output voltage and the gate pattern when the gain A = 1/2.

    In the following description of each embodiment, it is assumed that gain A = 1/2, but this is not limited to gain A = 1/2.

    In FIG. 2, the first stage from the top is the AC output voltage waveform, the second stage is the U arm gate pattern, the third stage is the X arm gate pattern, the fourth stage is the V arm gate pattern, and the fifth stage is the Y arm gate pattern. Respectively.

    The position of each arm on the circuit diagram is shown in FIG.

    When the pulse width α is zero, the gate patterns of the U arm and the V arm are synchronized 180 ° on and 180 ° off pulses, and the AC output voltage Vout maintains zero.

    When the pulse width α is not zero, α / 2 is added to the phase θ of the AC output voltage in the case of the U arm and subtracted in the case of the V arm.

    That is, this means that the gate pattern phase of the U arm is advanced by α / 2 and the gate pattern phase of the V arm is delayed by α / 2 with respect to the phase θ of the AC output voltage.

    As a result, the AC output voltage Vout becomes one pulse having a pulse width α, and the phase thereof is synchronized with the phase θ of the AC output voltage.

    Therefore, the fundamental wave effective value and phase of the AC output voltage of the one-pulse single-phase bridge voltage type self-excited converter can be controlled quickly and accurately.

    As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter according to the present embodiment, the fundamental wave effective value and phase of the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter are set at high speed. It becomes possible to control accurately.

    (Second Embodiment) FIG. 3 is a block diagram showing a configuration example of a pulse width arithmetic unit in a control device for a single-pulse single-phase bridge voltage source self-excited converter according to this embodiment, which is the same as FIG. Parts are denoted by the same reference numerals and description thereof is omitted, and only different parts are described here.

    That is, as shown in FIG. 3, the pulse width calculation device 5 according to the present embodiment includes a proportional device 12, a limiter 13, a sin-1 (arc sine) calculation device 14, and a proportional device 15. A desired pulse width is calculated.

    The proportional device 12 multiplies the fundamental wave effective value of the AC output voltage (one pulse voltage) output to the AC terminal of the one-pulse single-phase bridge voltage type self-excited converter by a gain π / (2√2 VDC). Calculate the modulation factor.

    The limiter 13 has a lower limit value of 0 and an upper limit value of 1. The limiter 13 limits the modulation rate output from the proportional device 12.

    The sin-1 arithmetic unit 14 calculates half of the pulse width from the limited modulation rate that is the output from the limiter 13.

    The proportional device 15 calculates the pulse width by multiplying the output from the sin-1 calculation device 14 by the gain 2.

    Next, the operation of the pulse width arithmetic unit 5 in the control device of the one-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described.

    In FIG. 3, the proportional device 12 modulates the fundamental wave effective value Vout of the AC output voltage output to the AC terminal of the 1-pulse single-phase bridge voltage type self-excited converter by the gain π / (2√2VDC). The rate k is calculated.

    Here, VDC is a DC voltage, and control with higher accuracy can be performed by changing the gain of the proportional device 12 in accordance with the fluctuation of the DC voltage VDC.

    The limiter 13 limits the modulation factor k from the proportional device 12.

    The sin-1 arithmetic unit 14 calculates a half of the pulse width from the limited modulation rate k from the limiter 13.

    The proportional device 15 calculates the pulse width α by multiplying the output from the sin-1 calculation device 14 by the gain 2.

    That is, the pulse width calculation device 5 of the present embodiment presents a specific calculation method of the pulse width calculation device 5 in the first embodiment shown in FIG. This is an equation obtained by solving (Equation 1) for α.

    By using the pulse width calculation device 5 of the present embodiment, there is an advantage that the fundamental fundamental effective value Vout of the actual AC output voltage coincides in principle with the command value.

Vout: fundamental value of AC output voltage [V]
VDC: DC voltage [V]
α: AC output voltage pulse width [rad]
As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter using the pulse width calculation device 5 of the present embodiment, the basics of the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter. The wave rms value and phase can be controlled at high speed and more accurately.

  (Third Embodiment) FIG. 4 is a block diagram showing a configuration example of a pulse width arithmetic unit in a control device for a one-pulse single-phase bridge voltage source self-excited converter according to this embodiment, which is the same as FIG. Parts are denoted by the same reference numerals and description thereof is omitted, and only different parts are described here.

  That is, as shown in FIG. 4, the pulse width calculation device 5 according to the present embodiment includes a proportional device 12, a proportional device 16, and a limiter 17, and calculates a desired pulse width.

  The proportional device 12 multiplies the fundamental wave effective value of the AC output voltage (one pulse voltage) output to the AC terminal of the one-pulse single-phase bridge voltage type self-excited converter by a gain π / (2√2 VDC). Calculate the modulation factor.

  The proportional device 16 multiplies the modulation factor, which is an output from the proportional device 12, by a gain K and outputs the result.

  The limiter 17 has a lower limit value of 0 and an upper limit value set to π, and limits the output from the proportional device 16.

  Next, the operation of the pulse width arithmetic unit 5 in the control device of the one-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described.

  In FIG. 4, the proportional device 12 modulates the fundamental wave effective value Vout of the AC output voltage output to the AC terminal of the 1-pulse single-phase bridge voltage type self-excited converter by a gain π / (2√2VDC). The rate k is calculated.

  Here, VDC is a DC voltage, and control with higher accuracy can be performed by changing the gain of the proportional device 12 in accordance with the fluctuation of the DC voltage VDC.

  The proportional device 16 multiplies the modulation factor from the proportional device 12 by the gain K and outputs the result.

  The limiter 17 limits the output from the proportional device 16 and outputs the pulse width α.

  That is, the pulse width calculation device 5 of the present embodiment presents a specific calculation method of the pulse width calculation device 5 in the first embodiment shown in FIG. Since one arithmetic unit is not used, there is an advantage that the realization is much easier, but the actual fundamental wave effective value Vout of the actual AC output voltage has an error with respect to the command value.

  However, when used in a closed loop control system, the influence of the error is small, and therefore, the value (effectiveness) of adopting the pulse width calculation device 5 of the present embodiment from the viewpoint of ease of realization. )

  Note that π can be considered as an example of the gain K of the proportional device 16. At this time, the actual fundamental wave effective value Vout of the AC output voltage is equal to the command value when the modulation factor k is 0 and 1. .

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter using the pulse width calculation device 5 of the present embodiment, the basics of the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter. The wave rms value and phase can be controlled at high speed and more accurately.

  (Fourth Embodiment) FIG. 5 is a block diagram showing a configuration example of a gate pattern generator in a control device for a 1-pulse single-phase bridge voltage source self-excited converter according to this embodiment, which is the same as FIG. Parts are denoted by the same reference numerals and description thereof is omitted, and only different parts are described here.

  That is, as shown in FIG. 5, the gate pattern generators 8A and 8B according to the present embodiment are configured by a sawtooth generator 18 and a comparator 19, and a desired gate pattern is obtained from the phase command value of each arm. It is trying to occur.

  The sawtooth wave generator 18 generates a sawtooth wave having a fundamental frequency synchronized with the phase command value of each arm.

  The comparator 19 compares the sawtooth wave generated by the sawtooth wave generator 18 with the DC value, and generates a gate pattern of the self-extinguishing device for each arm.

  Next, the operation of the gate pattern generators 8A and 8B in the control device for the single-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIG.

  FIG. 6 is a waveform diagram of a sawtooth wave and a gate pattern showing the operation of the present embodiment.

  In FIG. 5, the sawtooth wave generator 18 generates a sawtooth wave having an amplitude of 1 synchronized with the gate pattern phase φ of the arm.

  The comparator 19 compares the input direct current value with the sawtooth wave, and outputs 1 if the direct current value is greater than the sawtooth wave, and outputs 0 in the opposite case.

  The self-extinguishing device is turned on when the gate pattern is 1 and turned off when the gate pattern is 0.

  As described above, by generating a gate pattern by comparison with a sawtooth wave, the gate pattern generators 8A and 8B can be configured by hardware, and switching timing can be determined at high speed. The circuit used in the PWM method can be used and has many advantages.

  The gate pattern generators 8A and 8B can be realized by software.

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter using the gate pattern generators 8A and 8B of the present embodiment, the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter. Can be controlled at high speed and accurately, and the gate pattern generators 8A and 8B can be configured by hardware, so that the switching timing can be determined at high speed. At the same time, the circuit used in the conventional PWM system can be used.

  (Fifth Embodiment) FIG. 7 is a block diagram showing a configuration example of a gate pattern generator in a control device for a single-pulse single-phase bridge voltage source self-excited converter according to this embodiment, which is the same as FIG. Parts are denoted by the same reference numerals and description thereof is omitted, and only different parts are described here.

  That is, as shown in FIG. 7, the gate pattern generators 8A and 8B according to the present embodiment include a triangular wave generator 20 and a comparator 19, and generate a desired gate pattern from the phase command value of each arm. Like to do.

  The triangular wave generator 20 generates a triangular wave having a fundamental frequency synchronized with the phase command value of each arm.

  The comparator 19 compares the triangular wave generated by the triangular wave generator 20 with the DC value, and generates a gate pattern for each arm self-extinguishing device.

  Next, the operation of the gate pattern generators 8A and 8B in the control device for the single-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIG.

  FIG. 8 is a waveform diagram of a triangular wave and a gate pattern showing the operation of the present embodiment.

  In FIG. 7, the triangular wave generator 20 generates a triangular wave having an amplitude of 1 synchronized with the gate pattern phase φ of the arm.

  The comparator 19 compares the input DC value with the triangular wave, and outputs 1 if the DC value is larger than the triangular wave, and outputs 0 in the opposite case.

  The self-extinguishing device is turned on when the gate pattern is 1 and turned off when the gate pattern is 0.

  Thus, by generating a gate pattern by comparison with a triangular wave, the gate pattern generators 8A and 8B can be configured by hardware, and switching timing can be determined at a high speed. The circuit used in the PWM method can be used and has many advantages.

  The gate pattern generators 8A and 8B can be realized by software.

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter using the gate pattern generators 8A and 8B of the present embodiment, the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter. Can be controlled at high speed and accurately, and the gate pattern generators 8A and 8B can be configured by hardware, so that the switching timing can be determined at high speed. At the same time, the circuit used in the conventional PWM system can be used.

  (Sixth Embodiment) FIG. 9 is a block diagram showing a configuration example of a control device for a one-pulse single-phase bridge voltage source self-excited converter according to this embodiment.

  That is, as shown in FIG. 9, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment includes a proportional device 12, a sin operation device 21, an absolute value operation device 22, and a gate pattern. The generator 23, the inverter 11 </ b> A, and the inverter 11 </ b> B are configured to output an AC output voltage (one pulse voltage) having a desired fundamental wave effective value and phase from an AC terminal.

  The proportional device 12 multiplies the fundamental wave effective value of the AC output voltage (one pulse voltage) output to the AC terminal of the one-pulse single-phase bridge voltage type self-excited converter by a gain π / (2√2 VDC). Calculate the modulation factor.

  The sin arithmetic unit 21 generates a fundamental frequency sine wave having a unit amplitude synchronized with the phase of the AC output voltage (one pulse voltage).

  The absolute value calculation device 22 calculates and outputs the absolute value of the fundamental frequency sine wave that is the output from the sin calculation device 21.

  The gate pattern generation device 23 receives the modulation factor output from the proportional device 12 and the absolute value of the fundamental frequency sine wave output from the absolute value calculation device 22, and based on each input, the gate pattern Is output.

  The inverter 11A receives the output from the gate pattern generator 23 as an input, inverts the input, and outputs it.

  The inverter 11B receives the output from the gate pattern generator 23 and inverts the input for output.

  That is, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment generates the absolute value waveform of the fundamental frequency sine wave of unit amplitude synchronized with the phase of the AC output voltage, and the sine wave As a configuration for generating a gate pattern of each arm self-extinguishing device of a one-pulse single-phase bridge voltage source self-excited converter by comparing the absolute value waveform and the modulation factor calculated by the proportional unit 12, a desired basic An AC output voltage (one pulse voltage) having a wave effective value and a phase is output from an AC terminal.

  Next, the operation of the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIGS.

  FIG. 10 is a waveform diagram of an AC output voltage and a gate pattern showing the operation of the present embodiment.

  FIG. 11 is a diagram illustrating an example of a table for determining a gate pattern according to the present embodiment.

  In FIG. 9, the proportional device 12 modulates the fundamental wave effective value Vout of the AC output voltage output to the AC terminal of the 1-pulse single-phase bridge voltage type self-excited converter by a gain π / (2√2VDC). The rate k is calculated.

  Here, VDC is a DC voltage, and control with higher accuracy can be performed by changing the gain of the proportional device 12 in accordance with the fluctuation of the DC voltage VDC.

  The sin arithmetic unit 21 generates a fundamental frequency sine wave having a unit amplitude synchronized with the phase θ of the AC output voltage.

  The absolute value calculation device 22 calculates the absolute value a of the fundamental frequency sine wave from the sin calculation device 21.

  The gate pattern generator 23 generates a gate pattern according to the table shown in FIG. 11 based on the magnitude relationship between the modulation factor k from the proportional device 12 and the absolute value a of the fundamental frequency sine wave from the absolute value calculator 22. To do.

  In FIG. 10, the first stage from the top is the waveform of the sine wave absolute value a and the modulation factor k, the second stage is the AC output voltage waveform, the third stage is the U arm gate pattern, the fourth stage is the X arm gate pattern, 5 The stage shows the V arm gate pattern, and the stage 6 shows the Y arm gate pattern.

  The position of each arm on the circuit diagram is shown in FIG.

  In the present embodiment, by directly comparing the sine wave absolute value a and the modulation factor k to obtain the gate pattern of all the arms, the pulse width α is calculated as sin-1 (arc sine) as described above. The gate width is determined by comparing the sine wave absolute value a and the modulation factor k, and as a result, the pulse width α is obtained by calculating sin-1 (arc sine). Is equivalent to that.

  Therefore, the fundamental wave effective value and phase of the AC output voltage of the one-pulse single-phase bridge voltage type self-excited converter can be controlled quickly and accurately.

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter according to the present embodiment, the fundamental wave effective value and phase of the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter are set at high speed. It becomes possible to control accurately.

  (Seventh Embodiment) FIG. 12 is a block diagram showing a configuration example of a control device for a one-pulse single-phase bridge voltage source self-excited converter according to this embodiment.

  That is, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment includes a proportional device 12, a gate pattern generator 23, and a triangular wave generator 24 as shown in FIG. The AC output voltage (one pulse voltage) having a desired fundamental wave effective value and phase is output from the AC terminal.

  The proportional device 12 multiplies the fundamental wave effective value of the AC output voltage (one pulse voltage) output to the AC terminal of the one-pulse single-phase bridge voltage type self-excited converter by a gain π / (2√2 VDC). Calculate the modulation factor.

  The triangular wave generator 24 generates a triangular wave having a frequency twice as high as the fundamental frequency that reciprocates between 0 and 1 synchronized with the phase of the AC output voltage (one pulse voltage).

  The gate pattern generator 23 receives the modulation factor output from the proportional device 12 and the triangular wave output from the triangular wave generator 24, and outputs a gate pattern based on each input.

  In other words, the control device for the single-pulse single-phase bridge voltage source self-excited converter according to the present embodiment generates a triangular wave having a frequency twice the fundamental frequency synchronized with the phase of the AC output voltage. As a configuration for generating a gate pattern of each arm self-extinguishing device of the one-pulse single-phase bridge voltage source self-excited converter by comparing with the modulation factor calculated by 12, the desired fundamental RMS value and phase An AC output voltage (one pulse voltage) is output from the AC terminal.

  Next, the operation of the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIG.

  FIG. 13 is a waveform diagram of an AC output voltage and a gate pattern showing the operation of the present embodiment.

  In FIG. 12, in the proportional device 12, the fundamental wave effective value Vout of the AC output voltage output to the AC terminal of the 1-pulse single-phase bridge voltage type self-excited converter is multiplied by a gain π / (2√2VDC) and modulated. The rate k is calculated.

  Here, VDC is a DC voltage, and control with higher accuracy can be performed by changing the gain of the proportional device 12 in accordance with the fluctuation of the DC voltage VDC.

  The triangular wave generator 24 generates a triangular wave having a frequency twice as high as the fundamental wave frequency that reciprocates between 0 and 1 synchronized with the phase θ of the AC output voltage.

  The gate pattern generator 23 generates a gate pattern according to the table shown in FIG. 11 according to the magnitude relationship between the modulation factor k from the proportional device 12 and the triangular wave a from the triangular wave generator 24.

  In FIG. 13, the first stage from the top is the waveform of the triangular wave a and the modulation factor k, the second stage is the AC output voltage waveform, the third stage is the U arm gate pattern, the fourth stage is the X arm gate pattern, and the fifth stage is The V-arm gate pattern and the sixth stage show the Y-arm gate pattern, respectively.

  The position of each arm on the circuit diagram is shown in FIG.

  In the present embodiment, the gate patterns of all the arms are obtained by directly comparing the triangular wave a and the modulation factor k.

  Therefore, the fundamental wave effective value and phase of the AC output voltage of the one-pulse single-phase bridge voltage type self-excited converter can be controlled quickly and accurately.

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter according to the present embodiment, the fundamental wave effective value and phase of the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter are set at high speed. It becomes possible to control accurately.

  (Eighth Embodiment) FIG. 14 is a block diagram showing a configuration example of a control device for a 1-pulse single-phase bridge voltage source self-excited converter according to this embodiment.

  That is, as shown in FIG. 14, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment includes a pulse width calculation device 5, a proportional device 6A, a proportional device 6B, and an adder 9A. An adder 9B, a subtractor 10A, a subtractor 10B, a phase converter 7A, a phase converter 7B, a gate pattern generator 8A, a gate pattern generator 8B, an inverter 11A, and an inverter. 11B, and an AC output voltage (one pulse voltage) in which a desired DC component is superimposed on a desired fundamental wave effective value and phase is output from an AC terminal.

  The pulse width calculation device 5 calculates a desired pulse width from the fundamental wave effective value of the AC output voltage (one pulse voltage) output to the AC terminal of the one-pulse single-phase bridge voltage type self-excited converter.

  The proportional device 6A multiplies the pulse width of the AC output voltage calculated by the pulse width calculation device 5 by a gain of 1/2 and outputs the result.

  The proportional device 6B multiplies a pulse width adjustment value from a means (not shown) for superimposing a DC component on an AC output voltage (one pulse voltage) by a gain of 1/2 and outputs the result.

  The adder 9A adds the output from the proportional device 6A to the phase of the AC output voltage.

  The adder 9B adds the output from the proportional device 6B to the output from the adder 9A.

  The subtractor 10A subtracts the output from the proportional device 6A from the phase of the AC output voltage.

  The subtractor 10B subtracts the output from the proportional device 6B from the output from the subtractor 10A.

  The phase conversion device 7A receives the output from the adder 9B, converts the input phase into a range from 0 to 2π, and calculates the arm phase command value.

  The phase converter 7B receives the output from the subtractor 10B, converts the input phase into a range from 0 to 2π, and calculates the arm phase command value.

  The gate pattern generator 8A receives the output from the phase converter 7A as an input, and outputs a gate pattern of 1 when the input is smaller than 0 and smaller than π, and a gate pattern of 0 when smaller than π and smaller than 2π. Is output.

  The gate pattern generator 8B receives the output from the phase converter 7B as an input, outputs a gate pattern of 1 when the input is smaller than 0 and smaller than π, and outputs a gate pattern of 0 when smaller than π and smaller than 2π. Is output.

  The inverter 11A receives the output from the gate pattern generator 8A as an input, inverts the input, and outputs it.

  The inverter 11B receives the output from the gate pattern generator 8B as an input, inverts the input, and outputs it.

  That is, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment adjusts the pulse width of the AC output voltage calculated by the pulse width calculation device 5 by a predetermined pulse width, In the phase bridge voltage type self-excited converter, the ON period of the upper self-extinguishing device of the DC component high potential side arm is expanded, and the ON period of the upper self-extinguishing device of the DC component low potential side arm is narrowed by the same width, The DC component high-potential side arm upper stage self-extinguishing device is advanced by a half of the pulse width that widens the on-start timing, and the DC component low-potential side arm upper stage device on-timing is reduced to a pulse width of 2 AC output with the desired fundamental wave effective value and phase superimposed on the desired DC component to control the fundamental wave RMS value and phase of the AC output voltage so that it is delayed by a factor of Pressure so that output from the AC terminals of the (1 pulse voltage).

  Next, the operation of the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIG.

  FIG. 15 is a waveform diagram of an AC output voltage and a gate pattern showing the operation of the present embodiment.

  In FIG. 14, the pulse width calculation device 5 calculates a desired pulse width α from the fundamental wave effective value Vout of the AC output voltage output to the AC terminal of the 1-pulse single-phase bridge voltage type self-excited converter.

  In the proportional device 6A, the pulse width α of the AC output voltage from the pulse width arithmetic unit 5 is multiplied by a gain ½.

  The proportional device 6B multiplies the pulse width adjustment value Δα from a means (not shown) for superimposing the DC component on the AC output voltage by a gain of 1/2.

  The adder 9A adds the output from the proportional device 6A to the phase θ of the AC output voltage.

  The adder 9B adds the output from the proportional device 6B to the output from the adder 9A.

  In the subtracter 10A, the output from the proportional device 6A is subtracted from the phase θ of the AC output voltage.

  The subtracter 10B subtracts the output from the proportional device 6B from the output from the subtractor 10A.

  In the phase conversion device 7A, the phase input from the adder 9B is converted into a range from 0 to 2π to calculate the arm phase command value.

  In the phase conversion device 7B, the phase input from the subtractor 10B is converted into a range of 0 to 2π to calculate the phase command value of the arm.

  For example, when 3π is input to the phase conversion devices 7A and 7B, the output is π.

  The gate pattern generation device 8A outputs a gate pattern of 1 when the input from the phase conversion device 7A is smaller than 0 and smaller than π, and outputs a gate pattern of 0 when smaller than π and smaller than 2π (U-arm). Gate pattern).

  The gate pattern generator 8B outputs a gate pattern of 1 when the input from the phase converter 7B is less than 0 and less than π, and outputs a gate pattern of 0 when it is less than π and less than 2π (V-arm). Gate pattern).

  In the inverter 11A, the output from the gate pattern generator 8A is input, and the input is inverted and output (X arm gate pattern).

  In the inverter 11B, the output from the gate pattern generator 8B is input, and the input is inverted and output.

  The self-extinguishing device is turned on when the gate pattern is 1 and turned off when the gate pattern is 0.

  In FIG. 15, the first stage from the top is the AC output voltage waveform, the second stage is the U arm gate pattern, the third stage is the X arm gate pattern, the fourth stage is the V arm gate pattern, and the fifth stage is the Y arm gate pattern. Respectively.

  The position of each arm on the circuit diagram is shown in FIG.

  In the present embodiment, a direct current component can be superimposed without changing the fundamental wave component effective value and phase of the alternating current output voltage, and this is particularly applied when performing bias suppression control or the like of the transformer for the converter. Is possible.

  In FIG. 14, it is assumed that the U arm is a DC component high potential side and the V arm is a DC component low potential side.

  However, if the pulse width adjustment value Δα is a negative value, the high potential side and the low potential side of the DC component are reversed.

  The ON period of the U arm is extended by Δα, and the ON period of the V arm is reduced by Δα.

  Further, the gate pattern phase of the U arm is advanced by Δα / 2 and the gate pattern phase of the V arm is delayed by Δα / 2 so that the phase of the fundamental wave component does not change.

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter according to the present embodiment, the effective value and phase of the fundamental wave component are added to the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter. It is possible to superimpose a direct current component without changing the value, and in particular, it can be applied when performing bias suppression control or the like of a transformer for a converter.

  (Ninth Embodiment) FIG. 16 is a block diagram showing a configuration example of a control device for a single-pulse single-phase bridge voltage source self-excited converter according to this embodiment. The description is omitted, and only different parts are described here.

  That is, the control device for the single-pulse single-phase bridge voltage source self-excited converter according to the present embodiment has a pulse width adjustment value including a proportional device 25 and a proportional device 26 as shown in FIG. An arithmetic device is added so that a predetermined pulse width adjustment value is calculated, and a desired DC component is output from the AC terminal.

  The proportional device 25 multiplies the direct current component voltage command value superimposed on the alternating current output voltage (one pulse voltage) output to the alternating current terminal of the single pulse single phase bridge voltage type self-excited converter by a gain 1 / VDC. Calculate the component modulation rate.

  The proportional device 26 calculates a pulse width adjustment value by multiplying the direct current component modulation rate output from the proportional device 25 by the gain π.

  That is, the DC component voltage command value to be superimposed on the AC output voltage is divided by the DC voltage of the single-pulse single-phase bridge voltage type self-excited converter to obtain the value as the modulation factor of the DC component, and the modulation factor value is π As a configuration for obtaining a value obtained by multiplying as a pulse width adjustment value of each arm, a desired DC component is output from the AC terminal.

  Next, the operation of the pulse width adjustment value calculation device in the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described.

  In FIG. 16, the proportional unit 25 multiplies the DC component voltage command value Voffset superimposed on the AC output voltage output to the AC terminal of the single-pulse single-phase bridge voltage type self-excited converter by a gain 1 / VDC to generate a DC component. Modulation rate koffset is calculated.

  Here, VDC is a DC voltage, and control with higher accuracy can be performed by changing the gain of the proportional device 25 in accordance with the fluctuation of the DC voltage VDC.

  The proportional device 26 calculates the pulse width adjustment value Δα by multiplying the direct current component modulation factor koffset from the proportional device 25 by the gain π.

  That is, by adjusting the pulse width α with the pulse width adjustment value Δα obtained by the calculation of the pulse width adjustment value calculation device of the present embodiment, the fundamental one-cycle average value of the actual AC output voltage DC component is obtained. Thus, there is an advantage that it becomes equal to the DC component voltage command value Voffset.

  As described above, the control device for the pulse single-phase bridge voltage source self-excited converter according to the present embodiment makes it possible to perform control with higher accuracy, and the one-pulse single-phase bridge voltage source self-excited converter. A direct current component can be superimposed on the alternating current output voltage without changing the effective value and phase of the fundamental wave component.

  (Tenth Embodiment) FIG. 17 is a block diagram showing a configuration example of a control device for a one-pulse single-phase bridge voltage source self-excited converter according to this embodiment, and is the same as FIG. 14 and FIG. Are denoted by the same reference numerals and description thereof is omitted, and only different parts are described here.

  That is, as shown in FIG. 17, the control device for the single-pulse single-phase bridge voltage source self-excited converter according to the present embodiment includes a sawtooth wave generator 18A and a sawtooth wave generator 18B as shown in FIG. 14 and FIG. A comparator 19A, a comparator 19B, and a proportional device 27 are added to generate a desired gate pattern, and an AC output voltage in which a desired DC component is superimposed on a desired fundamental wave effective value and phase. (1 pulse voltage) is output from the AC terminal.

  The sawtooth wave generator 18A generates a sawtooth wave having a fundamental frequency synchronized with the phase command value of the U arm, which is an output from the phase converter 7A.

  The sawtooth wave generator 18B generates a sawtooth wave having a fundamental frequency synchronized with the phase command value of the V arm, which is an output from the phase converter 7B.

  The comparator 19A compares the sawtooth wave generated by the sawtooth wave generator 18A with the DC component modulation rate output from the proportional unit 25, and generates the gate pattern of the U-arm self-extinguishing device.

  The proportional device 27 multiplies the direct current component modulation rate, which is the output from the proportional device 25, by a gain of −1 and outputs the result.

  The comparator 19B compares the sawtooth wave generated by the sawtooth wave generator 18B with the output from the proportional unit 27, and generates a gate pattern of the V-arm self-extinguishing device.

  That is, the control device of the single-pulse single-phase bridge voltage source self-excited converter according to the present embodiment generates a sawtooth wave having a fundamental frequency synchronized with the phase command value of each arm, and compares the sawtooth wave with a DC value. Then, the gate pattern of the self-extinguishing device of each arm is generated, and the DC value to be compared with the sawtooth wave is set as the DC component modulation rate in one arm and the sign of the DC component modulation rate in the other arm. As an inverted value, an AC output voltage (one pulse voltage) in which a desired DC component is superimposed on a desired fundamental wave effective value and phase is output from an AC terminal.

  Next, the operation of the control device for the one-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIGS.

  FIG. 18 is a waveform diagram of an AC output voltage and a gate pattern showing the operation when the DC component modulation factor = 0 in the present embodiment.

  FIG. 19 is a waveform diagram of an alternating current output voltage and a gate pattern showing an operation when the direct current component modulation rate is not equal to zero in the present embodiment.

  In FIG. 17, the sawtooth wave generator 18A generates a sawtooth wave having a fundamental frequency synchronized with the phase command value of the U arm from the phase converter 7A.

  The sawtooth wave generator 18B generates a sawtooth wave having a fundamental frequency synchronized with the phase command value of the V arm from the phase converter 7B.

  The comparator 19A compares the sawtooth wave from the sawtooth wave generator 18A with the direct current component modulation factor koffset from the proportional unit 25 to generate a gate pattern of the U-arm self-extinguishing device.

  The proportional device 27 multiplies the DC component modulation factor koffset from the proportional device 25 by a gain of -1.

  The comparator 19B compares the sawtooth wave from the sawtooth wave generator 18B with the output from the proportional unit 27, and generates the gate pattern of the V-arm self-extinguishing device.

  18 and 19, the first stage from the top is the AC output voltage waveform, the second stage is the U arm gate pattern, the third stage is the X arm gate pattern, the fourth stage is the V arm gate pattern, and the fifth stage is Y. Each of the arm gate patterns is shown.

  The position of each arm on the circuit diagram is shown in FIG.

  In the present embodiment, the direct current component to be compared with the sawtooth wave is set to the direct current component modulation factor koffset, so that the direct current component can be superimposed on the alternating current output voltage.

  In particular, the present invention can be easily applied when a sawtooth wave comparison is employed as a gate pattern generator.

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter according to the present embodiment, the effective value and phase of the fundamental wave component are added to the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter. It is possible to superimpose a DC component without changing.

  In particular, this configuration can be easily applied when a sawtooth wave comparison is employed as a gate pattern generator.

  (Eleventh Embodiment) FIG. 20 is a block diagram showing a configuration example of a control device for a single-pulse single-phase bridge voltage source self-excited converter according to this embodiment, and is the same as FIG. 14 and FIG. Are denoted by the same reference numerals and description thereof is omitted, and only different parts are described here.

  That is, as shown in FIG. 20, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment includes a triangular wave generator 20A, a triangular wave generator 20B, and FIG. A comparator 19A, a comparator 19B, and a proportional device 27 are added to generate a desired gate pattern, and an AC output voltage (1) in which a desired DC component is superimposed on a desired fundamental wave effective value and phase. Pulse voltage) is output from the AC terminal.

  The triangular wave generator 20A generates a triangular wave having a fundamental frequency synchronized with the phase command value of the U arm, which is an output from the phase converter 7A.

  The triangular wave generator 20B generates a triangular wave having a fundamental frequency synchronized with the phase command value of the V arm, which is an output from the phase converter 7B.

  The comparator 19A compares the triangular wave generated by the triangular wave generator 20A with the DC component modulation rate output from the proportional unit 25, and generates the gate pattern of the U-arm self-extinguishing device.

  The proportional device 27 multiplies the direct current component modulation rate, which is the output from the proportional device 25, by a gain of −1 and outputs the result.

  The comparator 19B compares the triangular wave generated by the triangular wave generator 20B with the output from the proportional unit 27, and generates the gate pattern of the V-arm self-extinguishing device.

  In other words, the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment generates a triangular wave having a fundamental frequency synchronized with the phase command value of each arm, and compares the triangular wave with a DC value. Then, the gate pattern of each arm self-extinguishing device is generated, and the DC value to be compared with the triangular wave is the DC component modulation factor in one arm, and the value obtained by inverting the sign of the DC component modulation factor in the other arm. As described above, an AC output voltage (one pulse voltage) in which a desired DC component is superimposed on a desired fundamental wave effective value and phase is output from an AC terminal.

  Next, the operation of the control device for the one-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIGS.

  FIG. 21 is a waveform diagram of an AC output voltage and a gate pattern showing the operation when the DC component modulation factor = 0 in the present embodiment.

  FIG. 22 is a waveform diagram of an AC output voltage and a gate pattern showing an operation when the DC component modulation rate is not equal to 0 in the present embodiment.

  In FIG. 20, the triangular wave generator 20A generates a triangular wave having a fundamental frequency synchronized with the phase command value of the U arm from the phase converter 7A.

  The triangular wave generator 20B generates a triangular wave having a fundamental frequency synchronized with the phase command value of the V arm from the phase converter 7B.

  The comparator 19A compares the triangular wave from the triangular wave generator 20A with the DC component modulation factor koffset, which is the output from the proportional unit 25, to generate the gate pattern of the U-arm self-extinguishing device.

  The proportional device 27 multiplies the direct current component modulation factor koffset from the proportional device 25 by a gain of −1 and outputs the result.

  The comparator 19B compares the triangular wave from the triangular wave generator 20B with the output from the proportional unit 27, and generates the gate pattern of the V-arm self-extinguishing device.

  21 and 22, the first stage from the top is the AC output voltage waveform, the second stage is the U arm gate pattern, the third stage is the X arm gate pattern, the fourth stage is the V arm gate pattern, and the fifth stage is Y. Each of the arm gate patterns is shown.

  The position of each arm on the circuit diagram is shown in FIG.

  In the present embodiment, the direct current component to be compared with the triangular wave is set to the direct current component modulation factor koffset, so that the direct current component can be superimposed on the alternating current output voltage.

  In particular, it can be easily applied when triangular wave comparison is adopted as the gate pattern generation device.

  As described above, in the control device for the pulse single-phase bridge voltage type self-excited converter according to the present embodiment, the effective value and phase of the fundamental wave component are added to the AC output voltage of the single-pulse single-phase bridge voltage type self-excited converter. It is possible to superimpose a DC component without changing.

  In particular, this configuration can be easily applied when a sawtooth wave comparison is employed as a gate pattern generator.

  (Twelfth Embodiment) A control apparatus for a one-pulse single-phase bridge voltage source self-excited converter according to this embodiment comprises means for generating a gate pulse of the self-extinguishing device of each arm, and each arm. And a means for prohibiting a change in the on and off states again for a certain period of time when the on and off states of the self-extinguishing device change.

  Next, the operation of the control device for the 1-pulse single-phase bridge voltage source self-excited converter according to the present embodiment configured as described above will be described with reference to FIG.

  FIG. 23 is a waveform diagram of a gate pattern showing the operation of the present embodiment.

  Self-extinguishing devices can break if the switching state changes again within a certain period of time after the switching state changes.

  In the present embodiment, in order to prevent such a self-extinguishing device from being damaged, switching is prohibited for a certain period after the switching state is changed.

  In FIG. 23, the above-described period is shown as a switching inhibition period.

  In the case of multiple pulses such as carrier comparison PWM, a method has been performed in which switching occurs only once in a half cycle of a triangular wave carrier. In the case of one pulse, the present embodiment As described above, it is an optimal method to provide a switching inhibition period.

  Thereby, damage to the self-extinguishing device can be prevented.

  As described above, in the control device of the pulse single-phase bridge voltage source self-excited converter according to the present embodiment, it is possible to prevent the self-extinguishing device from being damaged due to an increase in the number of switching after the switching state is changed. It becomes.

  (Other Embodiments) It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention at the stage of implementation. In addition, the embodiments may be combined as appropriate as possible, and in that case, the combined effects can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem (at least one) described in the column of the problem to be solved by the invention can be solved, and the effect of the invention can be solved. When (at least one of) the effects described in the column can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

The block diagram which shows the structural example of the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 1st Embodiment of this invention. The waveform diagram of the alternating current output voltage and gate pattern which show the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 1st Embodiment. The block diagram which shows the structural example of the pulse width calculating apparatus in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 2nd Embodiment of this invention. The block diagram which shows the structural example of the pulse width calculating apparatus in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 3rd Embodiment of this invention. The block diagram which shows the structural example of the gate pattern generator in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 4th Embodiment of this invention. The sawtooth wave and the waveform diagram of a gate pattern which show operation | movement of the gate pattern generator in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 4th Embodiment. The block diagram which shows the structural example of the gate pattern generator in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 5th Embodiment of this invention. The waveform diagram of the triangular wave and gate pattern which show the operation | movement of the gate pattern generator in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 5th Embodiment. The block diagram which shows the structural example of the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 6th Embodiment of this invention. The waveform diagram of the alternating current output voltage and gate pattern which show the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 6th Embodiment. The figure which shows an example of the table for determining the gate pattern of the said 6th Embodiment. The block diagram which shows the structural example of the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 7th Embodiment of this invention. The waveform diagram of the alternating current output voltage and gate pattern which show the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 7th Embodiment. The block diagram which shows the structural example of the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter by the 8th Embodiment of this invention. The wave form diagram of the alternating current output voltage and gate pattern which show the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 8th Embodiment. The block diagram which shows the structural example of the control apparatus of the 1 pulse single phase bridge voltage source self-excited converter by the 9th Embodiment of this invention. The block diagram which shows the structural example of the control apparatus of the 1 pulse single phase bridge voltage type self-excitation converter by the 10th Embodiment of this invention. The waveform diagram of the alternating current output voltage and gate pattern in the case of direct current | flow component modulation factor = 0 which shows the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 10th Embodiment. The wave form diagram of the alternating current output voltage and gate pattern in the case of direct current | flow component modulation factor ≠ 0 which shows the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 10th Embodiment. The block diagram which shows the structural example of the control apparatus of the 1 pulse single phase bridge voltage source self-excited converter by the 11th Embodiment of this invention. The waveform diagram of the alternating current output voltage and gate pattern in case the direct current component modulation factor = 0 which shows the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 11th Embodiment. The waveform diagram of the alternating current output voltage and gate pattern in the case of direct current | flow component modulation factor ≠ 0 which shows the operation | movement in the control apparatus of the 1 pulse single phase bridge voltage type self-excited converter of 11th Embodiment. The wave form diagram of the gate pattern which shows the operation | movement of the 12th Embodiment of this invention. The circuit diagram which shows the structural example of the conventional 1 pulse single phase bridge voltage type self-excited converter. The wave form diagram of an alternating current output voltage at the time of carrying out the one pulse operation | movement of the 1 pulse single phase bridge voltage type self-excited converter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A ... Self-extinguishing device 1B ... Self-extinguishing device 1C ... Self-extinguishing device 1D ... Self-extinguishing device 2A ... A reflux diode 2B ... A reflux diode 2C ... A reflux diode 2D ... A reflux diode -Do 3 ... DC capacitor 4 ... Power system or load 5 ... Pulse width calculation device 6 ... Proportional device (gain: 1/2)
6A ... Proportional device (gain: 1/2)
6B ... proportional device (gain: 1/2)
7A ... Phase conversion device (converts phase to 0-2π)
7B ... Phase conversion device (converts phase to 0-2π)
8A ... Gate pattern generator 8B ... Gate pattern generator 9 ... Adder 9A ... Adder 9B ... Adder 10 ... Subtractor 10A ... Subtractor 10B ... Subtractor 11A ... Inverter 11B ... Inverter 12 ... Proportionator (gain) : Π / (2√2VDC), VDC: DC voltage)
13 ... Limiter (lower limit: 0, upper limit: 1)
14 ... sin-1 (arc sine) calculation device 15 ... proportional device (gain: 2)
16 ... Proportional device (gain: K)
17 ... Limiter (lower limit: 0, upper limit: π)
18 ... sawtooth wave generator (fundamental frequency, -1 to 1)
18A ... sawtooth wave generator (fundamental frequency, -1 to 1)
18B ... sawtooth wave generator (fundamental frequency, -1 to 1)
DESCRIPTION OF SYMBOLS 19 ... Comparator 19A ... Comparator 19B ... Comparator 20 ... Triangular wave generator (fundamental frequency, -1 to 1)
21 ... sin arithmetic unit 22 ... absolute value arithmetic unit 23 ... gate pattern generator 24 ... triangular wave generator (frequency twice the fundamental wave frequency, 0 to 1)
25 ... Proportional device (Gain: 1 / VDC, VDC: DC voltage)
26: Proportional device (gain: π)
27 ... Proportional device (gain: -1)
28 ... Proportional device (gain: A)
29: Proportional device (gain: 1-A).

Claims (1)

A control device for a one-pulse single-phase bridge voltage source self-excited converter in which a plurality of self-extinguishing devices are bridge-connected, and an AC terminal is connected to a power system or a load and a DC terminal is connected to a DC capacitor. And means for generating a gate pulse of each self-extinguishing device, and prohibiting the on / off state from changing again for a certain period when the on / off state of each self-extinguishing device changes. Means to
A control device for a single-pulse single-phase bridge voltage-type self-excited converter.

Images