JP2000299984A - Control device for three-phase / single-phase PWM cycloconverter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid generation of large vibrations in an input current, even if the output voltage is multiplexed, regardless of the synchronization or asynchronization of switching carrier frequency with the frequency of power supply voltage. SOLUTION: A control device for three-phase/single-phase PWM cycloconverter has a power supply voltage information detecting section 22, an input current distribution factor generating section 24 outputting the ratio of the minimum value to intermediate value as an input current distribution factor among the absolute values of input current commands in the phase of input current command, an input information generating section 25, a switching pattern creating section 26, a switch signal generating section 29 generating and outputting on/off signals of carrier period of six bidirectional switches 11 to 16, and a bidirectional switch drive section 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power converter for converting a three-phase AC voltage into an arbitrary single-phase AC voltage or DC voltage, and multiplexing the output voltages of the single-phase output power converter in series or in parallel. To a power converter.

[0002]

2. Description of the Related Art A PWM cycloconverter can output a free output frequency and an amplitude without requiring a smoothing inductance or an energy storage element of a smoothing capacitor in a DC link, and can generate low-order harmonics in both an input current waveform and an output voltage waveform. It is a direct AC-AC power converter that can regenerate power. However, the PWM cycloconverter has
Since the input side and the output side are directly connected by a bidirectional switch, and there is no energy storage element between the input side and the output side, any fluctuation, asymmetry or distortion of the power supply voltage directly affects the output side. A method has been proposed for controlling a PWM cycloconverter that can respond online when there is fluctuation, asymmetry, or distortion of the power supply voltage by using the instantaneous value of the power supply voltage. The rate is fixed at 1. Actually, there is a disadvantage that the input power factor is not 1 due to the influence of the filter. IEEJ Transactions on Volume D, Volume 116, Issue 6, 1996 (1996), PP644-651 (hereinafter abbreviated as conventional example)
In the PWM cycloconverter control method proposed in
It is possible to cope with power supply voltage fluctuations and the like by the instantaneous value of the power supply voltage and the input current command, and it is also possible to make the input power factor variable.

[0003]

However, the PWM cycloconverter control device proposed in the above-mentioned conventional example is an analog control system.
And the control circuit is complicated. Further, in the control method, it is necessary to synchronize a switching carrier (hereinafter abbreviated as carrier) frequency with a power supply voltage frequency.
If the phase of the input current command is out of sync with the carrier when asynchronous or synchronous, the absolute value of the input current command switches between the minimum and intermediate phases during one carrier cycle, and the input current distribution balance is broken. Therefore, there is a problem that a large oscillation occurs in the input current and a problem that the output voltage becomes unstable at the time when the phase in which the absolute value of the input current command is the largest changes. In particular, when multiplexing the output voltages of several three-phase / single-phase PWM cycloconverters using the above-described control method, it is necessary to shift the phases of the carriers of each three-phase / single-phase PWM cycloconverter from each other. ,
The above problem always occurs. Therefore, the present invention provides a method for controlling the switching carrier frequency with the power supply voltage frequency regardless of whether the output voltage is multiplexed regardless of whether the output voltage is multiplexed or not. An object of the present invention is to provide a digital controller for a three-phase / single-phase PWM cycloconverter with a simple circuit.

[0004]

In order to solve the above-mentioned problems, the invention according to the first aspect is characterized in that a current can flow bidirectionally between each phase of a three-phase AC power supply and two terminals of a single-phase output, and self-conduction and self-interruption can be achieved. A three-phase / single-phase PWM cycloconverter control device for a power converter directly connected by six PWM-controlled bidirectional switches, wherein the three-phase AC power supply voltage is input to the three-phase AC power supply voltage. A power supply voltage information detecting unit that outputs a three-phase AC power supply line voltage for at least one phase, and a three-phase symmetric sine wave having the same frequency and an arbitrary amplitude as the three-phase AC power supply voltage as an input current command; The three-phase AC power supply voltage phase is set as the phase of the input current command, and the absolute value of the input current command in the phase of the input current command, and the ratio between the minimum value and the intermediate value is output as the input current distribution ratio. Input current distribution ratio generator and An input information generating unit that outputs, as input information, information that can determine the magnitude relationship between the absolute values of the input current commands and the sign of any one of the absolute values of the input current commands in the phase of the input current command, and a single-phase output voltage command. By inputting an absolute value, the phase of the three-phase AC power supply line voltage and the phase of the input current command, the input information, and the input current distribution ratio, the absolute value of one output phase and the input current command in one carrier cycle. The order of turning on / off the three bidirectional switches between the minimum input phase, the intermediate input phase, and the maximum input phase and the time to turn on each bidirectional switch are created as the switching pattern of this output phase. A switching pattern generating unit to output, a sign of the single-phase output voltage command, the input information, and an ON / OFF signal of one cycle of the carrier of the six bidirectional switches is generated by the switching pattern. And a bidirectional switch drive unit that generates and outputs a gate signal for driving the six bidirectional switches according to the ON / OFF signals of the six bidirectional switches. Things. According to a second aspect of the present invention, an input power factor compensation angle is input, and a three-phase symmetric sine wave having the same frequency as the three-phase AC power supply voltage and an arbitrary amplitude is used as an input current command, and An adder for adding the input power factor compensation angle to a voltage phase and outputting the same as the phase of the input current command is provided between the power supply voltage information detector and the switching pattern generator. Further, according to a third aspect of the present invention, the switching pattern output from the switching pattern generation unit only for a specific period during one carrier cycle, only a part of the sign of the single-phase output voltage command and the input information or An information updating unit for outputting the whole information is provided between the switching pattern creating unit and the switch signal generating unit. According to a fourth aspect of the present invention, the input power factor compensation angle is input, and a three-phase symmetric sine wave having the same frequency and an arbitrary amplitude as the three-phase AC power supply voltage is used as an input current command, and The addition unit that adds the input power factor compensation angle to the voltage phase and outputs the same as the phase of the input current command, and a switching pattern output from the switching pattern creation unit, for a specific period during one carrier cycle, An information updating unit for outputting only a part or all of the sign of the single-phase output voltage command and the input information is provided.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a three-phase embodiment of the present invention.
FIG. 2 is a block diagram showing a circuit configuration of a power converter using a single-phase PWM cycloconverter. In the figure, reference numeral 1 is a three-phase AC power supply, 2 is a single-phase load, 3, 4, and 5 are reactors,
6, 7, 8 are capacitors, 11, 12, 13, 14, 1
5 and 16 are bidirectional switches having a self-extinguishing ability, 21 is a three-phase transformer and a filter, 22 is a power supply voltage information detecting section for detecting a power supply voltage and a phase, 23 is an adding section, and 24 is an input current distribution ratio generating section. , 25 is an input information generation unit, 26 is a switching pattern generation unit, 27 is an information update 1 unit, 28 is an information update 2 unit, 29 is a switch signal generation unit, and 30 is a bidirectional switch drive unit.

The transformer and filter 21 shown in FIG. 1 are connected to two line voltages of the capacitors 6, 7, and 8 or two line voltages of the three-phase AC power supply 1 (in this example, the r-phase and s of the three-phase AC power supply 1). Phase and line voltage between the s-phase and the t-phase) to remove noise and output. The power supply voltage and phase detection unit 22 in FIG. 1 receives the instantaneous value of the power supply voltage via the transformer and the filter 21 and corrects the influence of the transformer and the filter 21 on the phase β of the power supply r phase and the power supply r phase. A line voltage Vrs between the s phase and a line voltage Vst between the r phase and the t phase are output. In the case where the three-phase AC power supply has a symmetric sine wave, the power supply voltage and phase detection unit 22 outputs only one power supply line voltage and uses a sine function according to the phase of the power supply voltage. Although a method of estimating two power supply line voltages may be used, when the three-phase AC power supply is asymmetric or distorted, it is preferable to output two power supply line voltages. The input unit 23 of FIG. 1 receives the input power factor compensation angle ε and receives the power supply voltage and the phase detection unit 22.
And the phase β of the phase voltage of the power supply r phase from the power supply, and outputs as the phase γ of the r-phase input current command. The three-phase input current command is a three-phase symmetric sine wave having an arbitrary amplitude shifted by ε from the phase of the power supply phase voltage. FIG. 2 shows the waveforms of the three-phase power supply phase voltage, the three-phase input current command, and ε.

The input current distribution ratio generator 24 shown in FIG. 1 reads and outputs the input current distribution ratio a from the input current distribution ratio table in accordance with the phase γ of the r-phase input current command from the adder 23. The input current distribution ratio a is a ratio between the minimum value and the intermediate value among the absolute values of the three-phase input current command. The relationship between γ and the input current distribution ratio a is as shown in equations (1) and (2). The input current distribution ratio a is calculated in advance and stored in the input current distribution ratio table. FIG. 2 shows a waveform of the input current distribution ratio a.

[0008]

(Equation 1)

The input information generating unit 25 shown in FIG. 1 uses the phase γ of the r-phase input current command from the adding unit 23 to calculate the section number (hereinafter abbreviated as IC) of the input current command from the input information table, that is, (IC1, IC2, IC3) and a reference signal (hereinafter abbreviated as Be) are read and output. The input information table is created as shown in Table 1. FIG. 2 shows Be waveforms and ICs.

[0010]

[Table 1]

The section number IC of the input current command is the number of each section which divides one cycle of the input current command by 60 ° as shown in FIG. The magnitude relationship of the input current commands of each input phase does not change in each section, that is, the IC can determine whether the input current command of each input phase is minimum, intermediate, or maximum. As shown in Table 1, when IC1, IC2, and IC3 are arranged in a 3-bit array, the possible range of IC is 0 to 5. Reference signal
Be is a 1-bit digital signal that identifies the sign of the input current command whose absolute value is maximum. When Be = 0, the input current command whose absolute value is maximum is positive, and when Be = 1, it is negative. I c
1, By combining IC2, IC3 and Be, it is possible to determine whether the absolute value of the input current command of each input phase is minimum, middle or maximum. The input phase at which the absolute value of the input current command is maximum is defined as the input Bas phase. Enter the input phase that minimizes the absolute value of the input current command.
Defined as c-phase. The input phase where the absolute value of the input current command is intermediate is defined as the input Top phase.

When the output voltage command (in this example, the voltage command Vuv * between the output terminals u and v) is positive (Csign = 0), the u terminal is used, and when the output voltage command is negative (Csign = 1). The terminal v is defined as a positive terminal, and the other output terminal is defined as a negative terminal. The positive terminal of the output when the reference signal Be is 1 and the negative terminal of the output when Be is 0 are defined as the output High terminal. Conversely, the negative terminal of the output when Be is 1 and the positive terminal of the output when Be is 0 are defined as the output Low terminal.

The switching pattern generator 26 shown in FIG. 1 outputs an output phase voltage command (a voltage command V between output terminals u and v in this example).
uv ^*) of type the absolute value V ^*, also the input current distribution ratio generating section 2
4, the reference signal Be from the input information generator 25, the phase γ of the r-phase input current command from the adder 23, the power supply voltage and the power supply line voltage from the phase detector 22 ( Vrs, Vst), the switching pattern (SP0, SP
Create and output 1). FIG. 3 is a configuration diagram of the switching pattern creation unit. Reference numeral 31 in the figure denotes a power supply voltage conversion unit,
32 is a timing calculation unit, and 33 is a pattern generation unit. The power supply voltage conversion unit 31 in FIG. 3 uses only addition and subtraction based on the phase γ of the r-phase input current command and the power supply line voltage (Vrs, Vst) to obtain Δetop = ABS (etop-ebas) and Δesec = ABS ( es
ec-ebas) is calculated. Here, the absolute value of X is ABS (X)
Notation. ebas is the instantaneous phase voltage of the input Bas phase, ese
c is the instantaneous phase voltage of the input Sec phase, etop is the instantaneous phase voltage of the input Top phase, Δetop is the absolute value of the line voltage between the input Top phase and the input Bas phase, and Δesec is the input Sec phase. And input B
This is the absolute value of the line voltage during the as phase. The timing calculator 32 in FIG. 3 calculates the provisional DC voltage Ed by the equation (3).

Ed = Δe _top + a * Δe _sec ………………………… (3)

Further, in order to generate the switching pattern (SP0, SP1) as shown in FIG. 4, the timing (T0, T1) is calculated by the equations (4) and (5).

T0 / T2 = 1- (1 + a) * V ^* / Ed ……………………… (4) T1 / T2 = 1-V ^* / Ed …………………… …… (5)

Note that T2 is a half cycle of the carrier. FIG.
The pattern generator 33 generates the switching patterns (SP0, SP1) as shown in FIG. 4 from the timings (T0, T1). The timing calculation unit 32 and the pattern generation unit 33 are not combined to calculate (T0, T1), and as shown in FIG. 4, a carrier triangular wave whose amplitude is modulated by Ed and (1 + a) * V ^* and V ^* May be generated to generate the switching pattern (SP0, SP1). That is, SP0 is set to 1 when the carrier triangular wave is higher than (1 + a) * V ^* , SP0 is set to 0 when the carrier triangular wave is lower than V ^* , and SP1 is set to 0 when the carrier triangular wave is higher than V ^* . (SP0,
(SP1) is the switching pattern of the output High terminal, and (S1)
P0, SP1) turns on the three bidirectional switches connected to the output High terminal as shown in Table 2. When one bidirectional switch is turned on, the other two bidirectional switches are turned off
I do.

[0018]

[Table 2]

The shape of the carrier triangular wave of the pattern generating section 33 may be as shown in FIG. 5 (a) or FIG. 5 (b). However, in this case, T2 in the equations (4) and (5) is one cycle of the triangular wave. The switching pattern (SP0, SP1) may be generated by comparing a carrier triangular wave having an amplitude of 1 with (1 + a) * V ^* / Ed and V ^* / Ed.

In the information updating unit 27 of FIG. 1, the switching pattern SP0 from the switching pattern creating unit 26 is 1
At this time, the section number (IC1, IC2, IC3) of the input current command from the input information generator 25 and the sign Csign of the output voltage command are output. That is, when SP0 is 0, the output of the information update 1 unit 27 does not change. When SP0 is 1, the bidirectional switches between the input Bas phase and the two output terminals are all ON, the other switches are all OFF, and when the input Sec phase and the input Top phase are switched, the output No switching is performed even if the sign of the voltage command changes. During the period when SP0 is 0, that is, during the period when the bidirectional switch between the input Sec phase or input Top phase and a certain output terminal is turned on, the input Sec phase and the input Top phase are switched, or the sign of the output voltage command changes. Then, the input current distribution becomes unbalanced in one carrier cycle,
Large vibration occurs in the input current waveform. This does not occur when the phase of the carrier triangular wave is synchronous with the input current command, but it always occurs when the phase of the carrier triangular wave and the input current command are out of sync with each other when the phase is asynchronous or synchronous. As described above, the information update 1 unit 27 prevents the input Sec phase and the input Top phase from switching during the period in which the bidirectional switch between the input Sec phase or the input Top phase and a certain output terminal is turned ON (when SP0 is 0). Because it protects, the switching carrier frequency is not synchronized with the power supply voltage frequency, or in the case of synchronization, the carrier and the input current command are out of phase. No large oscillation occurs in the input current. When the switching pattern SP1 from the switching pattern creation unit 26 is 0, the information update unit 28 in FIG.
And outputs the reference signal Be from. That is, when SP1 is 1, the output of the information update unit 28 does not change. The period during which all bidirectional switches between the input Bas phase and the two output terminals are turned on (S
If the input Bas phase changes during the period when P0 is 1), the two terminals of the output will be simultaneously commutated from one input phase to another input phase. However, if the two terminals of the output do not actually commute at the same time (in fact, they cannot be performed at the same time), the output voltage waveform and the input current waveform will be adversely affected, and unnecessary commutation loss will also occur. If the information update 2 part 28 is used, the input Top phase and the output H
Since control is performed so that the input Bas phase can be changed only during the period when the bidirectional switch between the igh terminals is ON (SP1 is 0),
This is not a problem.

The switch signal generator 29 shown in FIG. 1 receives the switching pattern (S
P0, SP1), the section number (IC1, IC2, IC3) of the input current command from the information update 1 unit 27, the sign Csign of the output voltage command, and the reference signal Be from the information update 2 unit 6. An ON / OFF signal for the switches 11-16 is generated and output. FIG. 6 is a configuration diagram of the switch signal generator. Reference numeral 61 in the figure
Is an input phase information detection unit, 62 is an inversion unit, 63 is a switching pattern conversion unit, 64 is a switching pattern distribution unit, and 65 is an ON / OFF determination unit. As shown in Table 1, the input phase information detection unit 61 in FIG. 6 uses the input current command section numbers (IC1, IC2, IC3) as shown in Table 1 to determine the input phase information (Jr, Kr, Js, Ks, Jt, Kt).
Occurs. FIG. 2 shows the waveforms of (Jr, Kr, Js, Ks, Jt, Kt). As shown in Table 3, the input y phase (y = r, s,
The level of the input current command of t) is known.

[0022]

[Table 3]

In practice, the input phase information detecting section 61 decodes an IC to detect input phase information (Jr, Kr, Js, Ks, Jt, Kt). Put (Jr, Kr, Js, Ks, Jt, Kt) in the input information table instead of the IC, and input (J
r, Kr, Js, Ks, Jt, Kt). Although this method does not require the input phase information detecting unit 61, when the input information generating unit 25 is executed by the CPU, there is a disadvantage that the number of signals output from the CPU is large. The inversion unit 62 in FIG. 6 is when Be = 0
(Jr, Js, Jt, Csign) are inverted and (Jr ', Js', J
t ', Csign'), and when Be = 1 (Jr, Js, Jt, Csig
n) are output as (Jr ', Js', Jt ', Csign') as they are. As shown in Table 4, the input y phase (y =
r, s, t) can be determined. As shown in Table 5, the output u and v terminals can be determined from Csign '.

[0024]

[Table 4]

[Table 5]

The switching pattern converter 63 shown in FIG. 6 converts the switching patterns (SP0, SP1) as shown in Table 6 (P
J, PK). FIG. 4 shows the waveform of (PJ, PK).

[0026]

[Table 6]

The switching pattern distribution unit 64 of FIG. 6 distributes the switching pattern (PJ, PK) of the output High terminal to two output terminals as shown in Table 5 according to the output terminal information Csign ', and switches the output terminals. Pattern (PJu, PK
u) and (PJv, PKv) are created. Always turn on the bidirectional switch between the output Low terminal and the input Bas phase. That is, output low
The switching pattern of the terminal is (0, 0). (PJx, PK
x), as shown in Table 7, turns on one of the three bidirectional switches connected to the output x terminal (x = u, v). When one bidirectional switch is turned on, the other two bidirectional switches are turned off.

[0028]

[Table 7]

The ON / OFF deciding section 65 in FIG. 6 compares the input phase information related to each bidirectional switch with the switching pattern of the output terminal to decide and output the ON / OFF signal of each bidirectional switch. Bidirectional switch Syx (y = r, s, t; x = u, v)
In (2), (Jy ′, Ky) and (PJx, PKx) are compared as shown in Table 8 to generate an ON / OFF signal Cyx of the bidirectional switch Syx. 7 and 8 show a logic circuit of the switch signal generator.

[0030]

[Table 8]

The bidirectional switch drive unit 30 controls ON / OFF of the six bidirectional switches 11-16 according to ON / OFF signals of the six bidirectional switches from the switch signal generating unit 29.

The control device of the three-phase / single-phase PWM cycloconverter of the present invention may include a CPU. For example, the addition unit 23, the input current distribution ratio generation unit 24, the input information generation unit 25, and the power supply voltage conversion unit 31 of the switching pattern generation unit 26 are processed by the CPU. Timing calculator 3
2 may be processed by the CPU. However, when the timing calculation unit 32 performs processing by the CPU, it is difficult to make the sampling cycle of the CPU shorter than the half cycle of the carrier. In the above embodiment, the input power factor compensation angle and the adder 23 may not be provided. However, in this case, since the input power factor cannot be changed, the input power factor is theoretically fixed at 1, but the input power factor does not actually become 1 due to the influence of the filter capacitor. As in the above-described embodiment, the actual input power factor can be controlled to 1 by inserting the input power factor compensation angle and the adder 23 to vary the input power factor.

[0033]

As described above, according to the present invention, three-phase
/ A digital controller for a single-phase PWM cycloconverter can be created, and only one switching pattern created from the output voltage command is distributed to the output terminals.
The amount of online calculation is small and the control circuit is simple. In addition, the information updating means sets the input T during the ON state of the bidirectional switch between each output terminal and the input Top phase or the input Sec phase.
Since the control is performed so that the op phase and the input Sec phase do not change, even if the switching carrier frequency is made asynchronous with the power supply voltage frequency, or if the phase of the carrier triangular wave and the input current command are shifted when synchronized, The multiplexing does not destroy the input current distribution balance.
Therefore, there is an effect that a large oscillation in the input current and an unstable state of the output voltage can be completely eliminated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a control device of a three-phase / single-phase PWM cycloconverter of the present invention.

FIG. 2 is a waveform diagram of a power supply voltage, an input current command, an input current distribution ratio, a reference signal, and input phase information according to the present invention.

FIG. 3 is a configuration diagram of a switching pattern creation unit according to the present invention.

FIG. 4 is a diagram of a switching pattern according to the present invention.

FIG. 5 is a waveform diagram of a carrier triangular wave of a pattern generation unit according to the present invention.

FIG. 6 is a configuration diagram of a switch signal generator of the present invention.

FIG. 7 is a logic circuit diagram of a switch signal generator of the present invention.

FIG. 8 is an example of a detailed logic circuit diagram of a switch signal generator of the present invention.

[Explanation of symbols]

1 Three-phase AC power supply 2 Single-phase load 3, 4, 5 Reactor 6, 7, 8 Capacitor 11, 12, 13, 14, 15, 16, 17, 18, 1
9 Bidirectional switch with self-extinguishing capability 21 Three-phase transformer and filter 22 Power supply voltage phase detector 23 Adder 24 Input current distribution ratio generator 25 Input information generator 26 Switching pattern generator 27 Information update 1 28 Information update 2 unit 29 switch signal generation unit 30 bidirectional switch drive unit 31 power supply voltage conversion unit 32 timing calculation unit 33 pattern generation unit 61 input phase information detection unit 62 inversion unit 63 switching pattern conversion unit 64 switching pattern distribution unit 65 ON / OFF determination Part a Input current distribution ratio Be Reference signal IC Input current command section number IC1, IC2, IC3 Binary 3 bits of input current command section number Csign Sign of output voltage command SP0, SP1 Switching pattern Vrs Power supply r phase and s Line voltage between phases Vst Line voltage between r and t phases of power supply V ^* Output phase voltage command interruption Pair phase β Phase of power phase voltage of r phase γ Phase of input current command of r phase ε Input power factor compensation angle

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Natsu Xiao Ei 2-1 Kurosaki Joishi, Yawatanishi-ku, Kitakyushu-shi, Fukuoka F-term (reference) 5H750 BA06 CC14 CC16 DD01 DD14 DD17 FF05 FF07

Claims (4)

[Claims] 1. A six-way PWM-controlled bidirectional switch that allows a current to flow bidirectionally and allows self-conduction and self-interruption between each phase of a three-phase AC power supply and two terminals of a single-phase output. In the control device for a three-phase / single-phase PWM cycloconverter of a power converter, a power supply that inputs the three-phase AC power supply voltage and outputs a three-phase AC power supply voltage phase and a three-phase AC power supply line voltage of at least one phase. A voltage information detection unit, a three-phase symmetric sine wave having the same frequency and an arbitrary amplitude as the three-phase AC power supply voltage is set as an input current command, and the three-phase AC power supply voltage phase is set as the phase of the input current command; Among the absolute values of the input current command in the phase of the current command, an input current distribution ratio generating unit that outputs a ratio between a minimum value and an intermediate value as an input current distribution ratio, and each of the inputs in the phase of the input current command. Absolute current command An input information generating unit that outputs, as input information, information that can determine the magnitude relationship of any one of the absolute values and the absolute value of a single-phase output voltage command; The phase of the input current command, the input information,
According to the input current distribution ratio, three bidirectional switches between one output phase and an input phase in which the absolute value of the input current command is the minimum, an intermediate input phase, and a maximum input phase in one carrier cycle are set to O.
A switching pattern creation unit that creates and outputs the order of N / OFF and the time to turn on each bidirectional switch as a switching pattern of this output phase, a sign of the single-phase output voltage command, the input information, and the switching pattern. A switch signal generating unit that generates and outputs an ON / OFF signal for one cycle of the carrier of the six bidirectional switches; and the six bidirectional switches according to the ON / OFF signals of the six bidirectional switches. A three-phase / single-phase PWM cyclo-converter, comprising: a bidirectional switch drive unit for generating and outputting a gate signal for driving the PWM. 2. An input power factor compensation angle is input, and a three-phase symmetric sine wave having the same frequency and an arbitrary amplitude as the three-phase AC power supply voltage is set as an input current command, and the input is input to the three-phase AC power supply voltage phase. 2. The device according to claim 1, wherein an addition unit that adds a power factor compensation angle and outputs the added value as a phase of the input current command is provided between the power supply voltage information detection unit and the switching pattern creation unit. Control device for single-phase / single-phase PWM cycloconverter. 3. A signal for outputting only a part or all of the sign of the single-phase output voltage command and the input information for a specific period during one carrier cycle according to the switching pattern output from the switching pattern generator. 2. The control device for a three-phase / single-phase PWM cycloconverter according to claim 1, wherein an update unit is provided between the switching pattern generation unit and the switch signal generation unit. 4. An input power factor compensation angle is input, and a three-phase symmetric sine wave having the same frequency and an arbitrary amplitude as the three-phase AC power supply voltage is set as an input current command, and the input is input to the three-phase AC power supply voltage phase. An addition unit that adds a power factor compensation angle and outputs the same as the phase of the input current command; and a switching pattern output from the switching pattern generation unit, for a specific period during one carrier cycle, the single-phase output voltage command. 3. The three-phase / single-phase PWM according to claim 1, further comprising an information updating unit for outputting only part or all of the input information.
Control device for cyclo converter.