JP3509094B2 - Control device for three-phase / single-phase PWM cycloconverter - Google Patents

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 a DC voltage, and a single-phase output power converter for multiplexing output voltages in series or in parallel. Power converter.

[0002]

2. Description of the Related Art A PWM cycloconverter can output a free output frequency and amplitude without requiring energy storage elements such as a smoothing inductance and a smoothing capacitor in a DC link, and can generate low-order harmonics in an input current waveform and an output voltage waveform. It is a direct AC-AC power converter that does not require power regeneration. However, the PWM cycloconverter
Since the input side and the output side are directly connected by the bidirectional switch and there is no energy storage element between the input side and the output side, when there is fluctuation, asymmetry or distortion of the power supply voltage, the output side is directly affected. We have proposed the control method of the PWM cycloconverter that can deal with the fluctuation, asymmetry or distortion of the power supply voltage online by using the instantaneous value of the power supply voltage, but the input power factor cannot be changed by these methods, that is, the input power factor cannot be changed. The rate is fixed at 1. Actually, there is a drawback that the input power factor is not 1 due to the influence of the filter. IEEJ Transactions on Volume D, Vol. 116, No. 6, 1996 (PP), PP644-651 (hereinafter abbreviated as conventional example)
In the PWM cycloconverter control method proposed in
It is possible to deal 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 possible to make the input power factor variable.

[0003]

However, since the PWM cycloconverter control device proposed in the above-mentioned conventional example is an analog control system, a CPU is required in the case of a digital control system.
And the control circuit is complicated. Further, in the control method, it is necessary to synchronize the switching carrier (hereinafter abbreviated as carrier) frequency with the power supply voltage frequency.
If the carrier and the input current command are out of phase with each other when they are asynchronous or synchronized, the input current distribution balance is destroyed by switching the phase between the minimum and intermediate absolute values of the input current command during one carrier cycle. Therefore, there is a problem that a large vibration occurs in the input current and a problem that the output voltage becomes unstable at the time when the phase where the absolute value of the input current command is maximum changes. In particular, when the output voltages of several three-phase / single-phase PWM cycloconverters using the above control method are multiplexed, it is necessary to shift the carrier phases of the three-phase / single-phase PWM cycloconverters from each other. ,
The problems mentioned above will always occur. Therefore, according to the present invention, even if the output voltage is multiplexed regardless of whether the switching carrier frequency is synchronous or asynchronous with the power supply voltage frequency, a large oscillation does not occur in the input current, and the online calculation amount of the control CPU is small. 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 problems, the invention according to claim 1 allows bidirectional current to flow between each phase of a three-phase AC power supply and two terminals of a single-phase output, and self-conduction and self-interruption. In a controller for a three-phase / single-phase PWM cycloconverter of a power converter that is directly connected by six PWM-controlled bidirectional switches, the three-phase AC power supply voltage is input to the three-phase AC power supply voltage. A power supply voltage information detection unit that outputs a three-phase AC power supply line voltage for at least one phase, and a three-phase symmetrical sine wave having the same frequency as the three-phase AC power supply voltage and an arbitrary amplitude as an input current command, The three-phase AC power supply voltage phase is set as the phase of the input current command, and among the absolute values of the input current command in the phase of the input current command, the ratio of the minimum value and the intermediate value is output as the input current distribution ratio. Input current distribution ratio generator , An input information generating unit that outputs as input information information that the magnitude of the absolute value of each of the input current commands in the phase of the input current command and the sign of any one of the absolute values can be determined, and a single-phase output voltage command By inputting an absolute value, 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, one output phase in one carrier cycle and the absolute value of the input current command Is the minimum input phase, the middle input phase, the maximum input phase 3 bidirectional switch ON / OFF sequence and the time to turn on each bidirectional switch is created as a switching pattern for this output phase. A switching pattern creation unit for outputting, a sign of the single-phase output voltage command, the input information, and the switching pattern generate an ON / OFF signal for one cycle of the carrier of the six bidirectional switches. And a switch signal generating section for outputting the gate signals for driving the six bidirectional switches according to ON / OFF signals of the six bidirectional switches, and a bidirectional switch driving section for outputting the gate signals. It is a thing. According to a second aspect of the present invention, the input power factor compensation angle is input, and a three-phase symmetrical 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. An addition unit that adds the input power factor compensation angle to the voltage phase and outputs it as the phase of the input current command is provided between the power supply voltage information detection unit and the switching pattern creation unit. In the invention according to claim 3, only a specific period of one carrier cycle, a code of the single-phase output voltage command, and a part of the input information, depending on the switching pattern output from the switching pattern creating section, or An information updating unit for outputting all 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 symmetrical 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. The input power factor compensation angle is added to the voltage phase, and the addition unit that outputs the phase as the input current command and the switching pattern output from the switching pattern creation unit for a specific period during one cycle of the carrier, An information updating unit for outputting only the sign of the single-phase output voltage command and a part or all of the input information is provided.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows three phases of an embodiment of the present invention.
It is a block configuration 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
Reference numerals 5 and 16 are bidirectional switches having a self-extinguishing capability, 21 is a three-phase transformer and a filter, 22 is a power supply voltage information detection unit for detecting the power supply voltage and phase, 23 is an addition unit, and 24 is an input current distribution ratio generation unit. , 25 is an input information generating unit, 26 is a switching pattern creating unit, 27 is an information updating 1 unit, 28 is an information updating 2 unit, 29 is a switch signal generating unit, and 30 is a bidirectional switch drive unit.

The transformer and filter 21 shown in FIG. 1 have two line voltages of the capacitors 6, 7, and 8 or two line voltages of the three-phase AC power source 1 (in this example, the r-phase and the s-phase of the three-phase AC power source 1). Phase and line voltage between s-phase and t-phase) are transformed to remove noise and output. The power supply voltage and phase detection unit 22 in FIG. 1 inputs the instantaneous value of the power supply voltage that has passed through the transformer and the filter 21, and corrects the effect of the transformer and the filter 21 by the phase β of the phase voltage of the power supply r phase and the power supply r phase. The line voltage Vrs between the s-phase and the line voltage Vst between the r-phase and the t-phase are output. In the power supply voltage and phase detection unit 22, when the three-phase AC power supply has a symmetrical sine wave, only one power supply line voltage is output, and two or three power supplies are used depending on the phase of the power supply voltage. It is also possible to estimate the voltage between two power supply lines, but if the three-phase AC power supply is asymmetrical or distorted, it is better to output the voltage between two power supply lines. The adder 23 of FIG. 1 receives the input power factor compensation angle ε and inputs the power supply voltage and the phase detector 22.
In addition to the phase β of the phase voltage of the r phase from the power source, the phase is output as the phase γ of the input current command of the r phase. The three-phase input current command is a three-phase symmetrical sine wave of arbitrary amplitude, which is deviated 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 rate generator 24 of FIG. 1 reads the input current distribution rate a from the input current distribution rate table and outputs it according to the phase γ of the r-phase input current command from the adder 23. The input current distribution ratio a is the ratio of the minimum value to 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 placed in the input current distribution ratio table. FIG. 2 shows the waveform of the input current distribution ratio a.

[0008]

[Equation 1]

The input information generator 25 of FIG. 1 uses the phase γ of the r-phase input current command from the adder 23 to input 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. Figure 2 shows the Be waveform and IC.

[0010]

[Table 1]

The section number IC of the input current command is the number of each section in which one cycle of the input current command is divided by 60 ° as shown in FIG. The magnitude relation of the input current command of each input phase does not change in each section, that is, it can be determined by the IC whether the input current command of each input phase is minimum, intermediate or maximum. As shown in Table 1, if IC1, IC2, and IC3 are arranged in a 3-bit array, the range of possible ICs is 0-5. Reference signal
Be is a digital 1 bit and is a signal for identifying the sign of the input current command having the maximum absolute value. The input current command with the maximum absolute value is positive when Be = 0, and negative when Be = 1. I c
It is possible to determine whether the absolute value of the input current command for each input phase is minimum, intermediate or maximum by combining 1, IC2, IC3 and Be. The input phase with the maximum absolute value of the input current command is defined as the input Bas phase. Input the input phase that minimizes the absolute value of the input current command.
Define as phase c. The input phase in which 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 v terminal is defined as the positive terminal, and the other output terminal is defined as the 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 output negative terminal when Be is 1 and the output positive terminal when Be is 0 are defined as the output Low terminal.

The switching pattern generator 26 of FIG. 1 outputs an output phase voltage command (in this example, a voltage command V between the output terminals u and v).
uv ^* ) absolute value V ^* is input, and the input current distribution rate generator 2
4, the input current distribution ratio a from the input information generator 25, the reference signal Be from the input information generator 25, the phase γ of the r-phase input current command from the adder 23, and the power supply voltage and the power supply line voltage from the phase detector 22 ( Vrs, Vst), 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 is a power supply voltage conversion unit,
Reference numeral 32 is a timing calculation unit, and 33 is a pattern generation unit. The power supply voltage conversion unit 31 of FIG. 3 uses Δetop = ABS (etop-ebas) and Δesec = ABS (EBS = eBS) by using only addition / subtraction based on the phase γ of the r-phase input current command and the power supply line voltage (Vrs, Vst). es
ec-ebas) is calculated. Here, the absolute value of X is ABS (X)
It is written as. ebas is the instantaneous phase voltage of the input Bas phase, and 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 type B
It is the absolute value of the line voltage during the as phase. The timing calculation unit 32 in FIG. 3 calculates the temporary DC voltage Ed by the formula (3).

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

Further, in order to generate the switching patterns (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. Figure 3
The pattern generation unit 33 generates the switching pattern (SP0, SP1) as shown in FIG. 4 from the timing (T0, T1). The timing calculation unit 32 and the pattern generation unit 33 are not combined to calculate (T0, T1), and the carrier triangular wave whose amplitude is modulated by Ed and (1 + a) * V ^* and V ^* are generated as shown in FIG. The switching patterns (SP0, SP1) may be generated by comparing That is, SP0 is set to 1 when the carrier triangle wave is higher than (1 + a) * V ^* , SP0 is set to 0 when the carrier triangle wave is higher than V ^* , SP1 is set to 1 when the carrier triangle wave is higher than V ^* , and SP1 is set to 0 when the carrier triangle wave is lower than V ^* . (SP0,
(SP1) is the switching pattern of the output High terminal, and (S1)
As shown in Table 2, the three bidirectional switches connected to the output High terminal are turned on by P0, SP1). After turning on one bidirectional switch, turn off the remaining two bidirectional switches
To 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 5 (b). However, in this case, T2 in equations (4) and (5) is one period 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 update 1 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 output two terminals are all ON, all the other switches are OFF, and when the input Sec phase and the input Top phase are switched, the output Switching is not performed even if the sign of the voltage command changes. If the input Sec phase and the input Top phase are switched 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, or the sign of the output voltage command changes. Then, the distribution of input current is unbalanced in one carrier cycle,
Large vibration occurs in the input current waveform. This does not occur when the carrier triangular wave and the input current command are in phase with each other, but they always occur when they are asynchronous or when the carrier triangular wave and the input current command are out of phase during synchronization. As described above, the information update 1 unit 27 prevents the input Sec phase and the input Top phase from switching during the period when 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). Since it protects, even if the switching carrier frequency is asynchronous with the power supply voltage frequency, or in the case of synchronization, even if the carrier and the input current command are out of phase, the balance of the input current distribution is not destroyed in either case, No big vibration occurs in the input current. When the switching pattern SP1 from the switching pattern creating unit 26 is 0, the information updating unit 2 of FIG.
The reference signal Be from is output. That is, when SP1 is 1, the output of the information update 2 unit 28 does not change. Period (S, S) for turning on all bidirectional switches between the input Bas phase and the two output terminals
If the input Bas phase changes during the period (P0 is 1), the two terminals of the output will simultaneously commutate from one input phase to another. However, if the two terminals of the output do not actually commutate at the same time (actually, they cannot be done simultaneously at the same time), the output voltage waveform and the input current waveform are adversely affected, and useless commutation loss occurs. By using the information update 2 part 28, the input Top phase and output H
Since it controls so that the input Bas phase can be changed only during the period when the bidirectional switch between the igh terminals is turned on (the period when SP1 is 0),
There is no problem with this.

The switch signal generator 29 of FIG. 1 uses 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 28 for six bidirectional directions. Generates and outputs an ON / OFF signal for switches 11-16. FIG. 6 is a block 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. The input phase information detection unit 61 in FIG. 6 uses the input current command section numbers (IC1, IC2, IC3) to input phase information (Jr, Kr, Js, Ks, Jt, Kt) as shown in Table 1.
To occur. Waveforms of (Jr, Kr, Js, Ks, Jt, Kt) are shown in FIG. As shown in Table 3, from (Jy, Ky), input y phase (y = r, s,
The input current command level of t) is known.

[0022]

[Table 3]

Actually, the input phase information detecting section 61 decodes the IC to detect the input phase information (Jr, Kr, Js, Ks, Jt, Kt). Instead of IC, (Jr, Kr, Js, Ks, Jt, Kt) is placed in the input information table and the (J
r, Kr, Js, Ks, Jt, Kt) may be output. This method does not require the input phase information detecting section 61, but has a drawback that when the input information generating section 25 is executed by the CPU, the number of signals output from the CPU is large. Inversion unit 62 in FIG. 6 is Be = 0
Invert (Jr, Js, Jt, Csign) to select (Jr ', Js', J
t ', Csign'), and when Be = 1 (Jr, Js, Jt, Csig
n) is output as it is as (Jr ', Js', Jt ', Csign'). As shown in Table 4, the input y-phase (y =
It is possible to judge which phase r, s, t) is. As shown in Table 5, it is possible to judge which of the output u and v terminals is based on Csign '.

[0024]

[Table 4]

[Table 5]

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

[0026]

[Table 6]

The switching pattern distribution unit 64 of FIG. 6 distributes the switching pattern (PJ, PK) of the output High terminal to the 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. Output low
The terminal switching pattern is (0, 0). (PJx, PK
x) turns on one of the three bidirectional switches connected to the output x terminal (x = u, v) as shown in Table 7. After turning on one bidirectional switch, turn off the remaining two bidirectional switches.

[0028]

[Table 7]

The ON / OFF determining unit 65 in FIG. 6 compares the input phase information related to each bidirectional switch with the switching pattern of the output terminal to determine the ON / OFF signal of each bidirectional switch and outputs it. Bidirectional switch Syx (y = r, s, t; x = u, v)
In (8), (Jy ', Ky) is compared with (PJx, PKx) as shown in Table 8 to generate the ON / OFF signal Cyx of the bidirectional switch Syx. 7 and 8 show the logic circuit of the switch signal generator.

[0030]

[Table 8]

The bidirectional switch drive section 30 controls ON / OFF of the six bidirectional switches 11-16 by the ON / OFF signals of the six bidirectional switches from the switch signal generation section 29.

A CPU may be incorporated in the control device of the three-phase / single-phase PWM cycloconverter of the present invention. 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, if the timing calculation unit 32 is processed 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-described embodiment, the input power factor compensation angle and the addition unit 23 may be omitted. However, in this case, since the input power factor cannot be changed, the input power factor is theoretically fixed at 1. However, the input power factor does not actually become 1 due to the influence of the filter capacitor. As in the embodiment described above, the actual input power factor can be controlled to 1 by inserting the input power factor compensation angle and the adder 23 and varying the input power factor.

[0033]

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

[Brief description of 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 of the present invention.

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

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

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

FIG. 7 is a logic circuit diagram of a switch signal generation section according to the present invention.

FIG. 8 is an example of a detailed logic circuit diagram of a switch signal generating section according to the present invention.

[Explanation of symbols]

1 Three-Phase AC Power Supply 2 Single-Phase Loads 3, 4, 5 Reactors 6, 7, 8 Capacitors 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 rate generator 25 Input information generator 26 Switching pattern generator 27 Information update 1 section 28 Information update 2 part 29 switch signal generation part 30 bidirectional switch drive part 31 power supply voltage conversion part 32 timing calculation part 33 pattern generation part 61 input phase information detection part 62 inversion part 63 switching pattern conversion part 64 switching pattern distribution part 65 ON / OFF decision Part a Input current distribution ratio Be Reference signal IC Input current command section number IC1, IC2, IC3 Input current command section number binary 3 bits Csign Output voltage command code SP0, SP1 Switching pattern Vrs Power supply r phase and s Line voltage between phases Vst Power line voltage between power supply r-phase and t-phase V ^* Absolute value of output phase voltage command β r Power supply phase Voltage phase γ r Phase of input current command ε Input power factor compensation angle

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Natsu Akatsuki Yaskawa Electric Co., Ltd. 2-1, Kurosaki Shiroishi, Hachimansai-ku, Kitakyushu, Fukuoka Prefecture (56) Reference JP-A-11-341807 (JP, A) Hei 7-7944 (JP, A) JP 11-252992 (JP, A) Jun Koyama et al., VVVF online control of PWM cycloconverter, IEEJ Transactions D, June 1996, Vol. 116, No. 6, p. ． 644-651 (58) Fields investigated (Int.Cl. ⁷ , DB name) H02M 5/00-5/48

Claims (4)

(57) [Claims] 1. A three-phase AC power supply, each phase and two terminals of a single-phase output are capable of bidirectionally flowing a current, capable of self-conduction and self-interruption, and directly connected by six PWM-controlled bidirectional switches. In a control device for a three-phase / single-phase PWM cycloconverter of a power converter, a power supply for inputting the three-phase AC power supply voltage and outputting a three-phase AC power supply voltage phase and a three-phase AC power supply line voltage for at least one phase A voltage information detection unit, the input current command is a three-phase symmetrical sine wave of the same frequency as the three-phase AC power supply voltage and an arbitrary amplitude, and the three-phase AC power supply voltage phase is the phase of the input current command, the input Among the absolute values of the input current command in the phase of the current command, an input current distribution ratio generator that outputs the ratio of the minimum value and the intermediate value as the input current distribution ratio, and each input in the phase of the input current command. Absolute of current command The input information generation unit that outputs the information that can determine the magnitude relationship and the sign of any one of the absolute values as input information, and the absolute value of the single-phase output voltage command, and the three-phase AC power supply line voltage and the Input current command phase, the input information,
Depending on the input current distribution ratio, three bidirectional switches between one output phase and the input phase with the minimum absolute value of the input current command, the intermediate input phase, and the maximum input phase in one cycle of the carrier are turned on.
A switching pattern creation unit that creates and outputs the N / OFF order and the time to turn on each bidirectional switch as a switching pattern of this output phase, the sign of the single-phase output voltage command, the input information, and the switching pattern. A switch signal generator that generates and outputs an ON / OFF signal for one carrier cycle 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 cycloconverter control device having a bidirectional switch drive section for generating and outputting a gate signal for driving the. 2. An input power factor compensation angle is input, a three-phase symmetrical 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 the input is applied to the three-phase AC power supply voltage phase. 3. The adder unit for adding a power factor compensation angle and outputting as a phase of the input current command is provided between the power supply voltage information detecting unit and the switching pattern creating unit. Control device for single-phase / single-phase PWM cycloconverter. 3. Information 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 creating unit. The control device for the three-phase / single-phase PWM cycloconverter according to claim 1, wherein an update unit is provided between the switching pattern creation unit and the switch signal generation unit. 4. An input power factor compensation angle is input, a three-phase symmetrical 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 the input is applied to the three-phase AC power supply voltage phase. An adder that adds a power factor compensation angle and outputs as a phase of the input current command, and the single-phase output voltage command for a specific period during one carrier cycle by the switching pattern output from the switching pattern creation unit. 3. The three-phase / single-phase PWM according to claim 1, further comprising: an information updating unit which outputs only a part of or all of the input information and the input information.
Cycloconverter control device.