JP2001251864A - Gate signal output apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gate signal output apparatus used in a PWM inverter unit and also in a PWM cyclo-converter, in common. SOLUTION: When the output apparatus us connected to a three-phase three- level PWM inverter unit, a mode switching switch 9 makes the connection real-time implementation circuit group 300 connected to a dead-time implementation circuit group 400. Then, gate signals 501 to 512 are outputted, by using a connection ratio setting registers 200, the connection real-time implementation circuit group 300, and the dead-time implementation circuit group 400. When the output apparatus is connection to the three-phase three-phase cycle-converter, a mode changing switch 9 makes the connection real-time implementation circuit group 300 connected to a bidirectional switch connection distributing circuit 80, and gate signals 501 to 509 are outputted by using the connection ratio setting register group 300, an input/output phase information setting register 220, and the bidirectional switch connection distributing circuit 80.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate signal output device for outputting a gate signal for controlling a power conversion device for converting power supplied from an AC power supply into AC power of an arbitrary frequency. Phase pulse width modulation (hereinafter P
WM) The present invention relates to a gate signal output device used for an inverter device and a three-phase / three-phase PWM cycloconverter device.

[0002]

2. Description of the Related Art FIG. 4 is an equivalent circuit diagram showing a main circuit configuration of a three-phase three-level PWM inverter device. As shown in FIG. 4, the three-phase three-level PWM inverter device includes input terminals 11 and 12, capacitors 13 and 14, insulated gate bipolar transistors (hereinafter, IGBTs) 15 to 26 which are semiconductor switching elements, and a diode 27. ~
44 and output terminals 45 to 47. This circuit is connected via input terminals 11 and 12 to a converter (not shown in FIG. 4) for converting an AC voltage to a DC voltage. The input terminal 11 is connected to the positive terminal of the converter, and the input terminal 12 is connected to the negative terminal of the converter. The capacitors 13 and 14 are connected to the input terminals 11 and 1
2 is smoothed.

This circuit is connected to U-phase, V-phase and W-phase loads via output terminals 45 to 47, respectively. U
The output phase voltages of the phases are controlled by switching IGBTs 15-18. The U-phase output phase voltage value becomes the voltage value at the input terminal 11 when the IGBTs 15 and 16 are turned on, and becomes the voltage value at the input terminal 12 when the IGBTs 17 and 18 are turned on.
Is turned on, the voltage value at the intermediate point 10 is obtained. V phase,
Similarly, the W-phase output phase voltages are IGBTs 19 to 22,
It is controlled by switching the BTs 23 to 26.

FIG. 5 is a block diagram showing a configuration of a gate signal output device for generating gate signals for switching the IGBTs 15 to 26, respectively. As shown in FIG. 5, the gate signal output device includes a carrier generation circuit 100.
, A connection ratio setting register group 200, a connection real time creation circuit group 300, a dead time creation circuit group 400, and gate signal output terminals 601 to 612. The connection ratio setting register group 200 includes connection ratio setting registers 201 to 212, and the connection real time creation circuit group 300 includes connection real time creation circuits 301 to 312.
And a dead time creation circuit group 400
Is composed of dead time creation circuits 401 to 412.

[0005] The carrier generation circuit 100 generates a triangular wave voltage which is a PWM carrier signal. The connection ratio setting registers 201 to 212 store each IGBT with respect to the time of one cycle of the triangular wave voltage obtained by comparing the voltage command of each phase with the triangular wave voltage which is the PWM carrier signal.
The connection time ratios of the switching patterns 15 to 26 are stored.

[0006] The connection real time creation circuits 301 to 312 are used to control the time of one cycle of the PWM carrier signal obtained from the carrier generation circuit 100 and the connection ratio setting registers 201 to 21.
Based on the ratio of the connection times of the switching patterns of the IGBTs 15 to 26 obtained from Step 2, the connection real time of the switching patterns of the IGBTs 15 to 26 in one cycle of the PWM carrier signal is created. The dead time creation circuits 401 to 412 are respectively IGBTs created by the connection real time creation circuits 301 to 312, respectively.
From the connection time of 15 to 26 switching patterns,
By subtracting the dead time for preventing short circuit between IGBTs 15-18, 19-22, and 23-26, each I
Gate signals 501 to 512 of GBTs 15 to 26 are output to gate signal output terminals 601 to 612, respectively.

FIG. 6 is an equivalent circuit diagram showing a main circuit configuration of a three-phase / 3-phase PWM cycloconverter device. FIG.
As shown in (a), the three-phase / 3-phase PWM cycloconverter includes input terminals 61 to 63 and a bidirectional switch 5.
1 to 59 and output terminals 64 to 66. This three-phase / 3-phase PWM cycloconverter device
The input terminals 61 to 63 are connected to R, S, and T phases of a three-phase AC power supply (not shown in FIG. 3).
The output terminals 64 to 66 are connected to U-phase, V-phase, and W-phase loads (not shown).

This three-phase / three-phase PWM cycloconverter converts a voltage supplied from a three-phase AC power supply into a three-phase AC voltage of an arbitrary frequency by switching the bidirectional switches 51 to 59. is there. As shown in FIG. 5B, each of the bidirectional switches 51 to 59
The one-way switch in which the GBT 70 and the diode 72 are connected in series and the one-way switch in which the IGBT 71 and the diode 73 are connected in series are connected in antiparallel.

A control device for controlling the three-phase / 3-phase PWM cycloconverter device as described above is disclosed in
No. 3,341,807. The control device described in this publication compares two line voltage values of the output voltage command with a triangular wave voltage which is a PWM carrier signal,
Four switching patterns SP0h, SP1h, SP
0m, SP1m, and the bidirectional switch 51 based on the four switching patterns SP0h, SP1h, SP0m, SP1m, and the phase information such as the phase of the R-phase voltage of the three-phase AC power supply and the phase of the output phase voltage. Gate signals 501 to 509 are generated.

FIG. 7 is a block diagram showing the configuration of a gate signal output device for generating gate signals 501 to 509 for switching the bidirectional switches 51 to 59 by the control device described above. As shown in FIG. 7, the gate signal output device includes a carrier generation circuit 100.
A connection ratio setting register group 200, a connection real time creation circuit group 300, a bidirectional switch connection distribution circuit 80,
Gate signal output terminals 601 to 609 are provided. The connection ratio setting register group 200 includes connection ratio setting registers 201 to 204, and the connection real time creation circuit group 300 includes connection real time creation circuits 301 to 304.
It is composed of

The carrier generating circuit 100 generates a triangular wave voltage which is a PWM carrier signal. Each of the connection ratio setting registers 201 to 204 stores one of the PWM carrier signals.
Switching pattern SP0h, SP1 for cycle
h, SP0m, and the connection time ratio of SP1m are stored. Connection real-time creation circuits 301 to 304
Is the time of one cycle of the PWM carrier signal obtained from the carrier generation circuit 100 and the connection ratio setting register 201
Each switching pattern SP0 obtained from ２０４204
h, SP1h, SP0m, SP1m, and the switching patterns SP0h, SP1h, SP0m, SP in one cycle of the PWM carrier signal.
1 m connection real time is created.

The bidirectional switch connection / distribution circuit 80 includes switching patterns SP0h, SP1h, SP0m, S
P1m connection real time and input / output phase information setting register 22
The gate signals 501 to 509 are generated based on the phase information such as the phase of the R phase of the three-phase AC voltage and the phase of the output phase voltage stored in 0, and the gate signals 501 to 50 are generated.
9 is output to the gate signal output terminals 601 to 609.

Normally, the gate signal output device as shown in FIGS. 5 and 7 has many common parts such as a connection ratio setting register and a connection real time creation circuit as described above. Therefore, if the gate signal output device can be shared between the PWM inverter device and the PWM cycloconverter device, the development cost and development period of the PWM inverter device and the PWM cycloconverter device can be reduced. However, conventionally, such a gate signal output device is separately designed for a PWM inverter device and for a PWM cycloconverter device. Therefore, when each gate signal output device is developed, there is a problem that a development cost and a time for the development are separately required.

Further, the gate signal output device as shown in FIG. 5 and FIG.
When a digital device such as C (hereinafter referred to as ASIC) is used, there is a problem that a large number of gate signal output terminals are required for the inverter and the cycloconverter.

[0015]

Conventionally, when a PWM inverter device or a PWM cycloconverter device is developed, a gate signal output device is used for a PWM inverter device.
Since it is separately required for the WM cycloconverter device, there is a problem that the development cost and the development period of the PWM inverter device and the PWM cycloconverter device are separately required.

The present invention relates to a PWM inverter device and a PWM
An object of the present invention is to provide a gate signal output device that can be commonly used with a cycloconverter device.

[0017]

In order to solve the above problem, the present invention provides a carrier generating means for generating a PWM carrier signal, and a connection time of a plurality of switching patterns with respect to a period of one cycle of the PWM carrier signal. A plurality of connection ratio setting registers each storing a ratio,
The ratio of the connection time of each switching pattern stored in each connection ratio setting register and the PWM
A plurality of connection real time creation circuits for respectively creating connection real time of each of the switching patterns in one cycle of the PWM carrier signal from a time of one cycle of the carrier signal; From the respective connection real times, subtracting a dead time for preventing a short circuit between the respective semiconductor switching elements,
A plurality of dead time generating circuits for respectively outputting gate signals to a plurality of semiconductor switching elements provided in the three-phase PWM inverter; a phase of a voltage input to the three-phase / 3-phase PWM cycloconverter; 3
An input / output phase information setting register for storing a phase of an output voltage command to be output from the phase PWM cycloconverter device, and the connection real time and the input / output phase register respectively created by the connection real time creation circuits A bidirectional switch connection / distribution circuit that outputs a gate signal to a plurality of bidirectional switches provided in the three-phase / three-phase PWM cycloconverter device based on each of the stored phases; A plurality of output terminals respectively connected to the bidirectional switch connection and distribution circuit for outputting respective gate signals output from the dead time creation circuits and the bidirectional switch connection and distribution circuit; When used in a PWM inverter device, each of the connection real time creation circuits and each of the dead time creation circuits Each connected, the 3-phase / 3-phase P
When used in a WM cycloconverter device, the device includes switching means for connecting the connection real-time creation circuits and the bidirectional switch connection distribution circuit.

The gate signal output device of the present invention has a three-phase PW
A carrier generating means necessary for generating a gate signal for switching a plurality of semiconductor switching elements of the M inverter device, each connection ratio setting register, each connection real time generation circuit, each dead time generation circuit, And a gate signal output terminal.

The gate signal output device according to the present invention further includes an input / output phase setting register necessary for outputting a gate signal for switching a plurality of bidirectional switches of a three-phase / 3-phase PWM cycloconverter device. And a bidirectional switch connection distribution circuit.

Furthermore, the gate signal output device of the present invention
There is provided switching means for switching whether each connection real-time creation circuit is connected to each dead time creation circuit or a bidirectional switch connection distribution circuit.

Since the gate signal output device of the present invention has the above-described configuration, a gate signal and a three-phase / three-phase PWM cyclone for switching a plurality of semiconductor switching elements of the three-phase PWM inverter device are provided. A gate signal can be output to switch a plurality of bidirectional switches of the converter device.

Therefore, when developing a three-phase PWM inverter device or a three-phase / 3-phase PWM cycloconverter device, it is possible to use the gate signal output device of the present invention to make the gate signal output device common. it can.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gate signal output device according to one embodiment of the present invention will be described in detail with reference to the drawings. In all the drawings, the components denoted by the same reference numerals all indicate the same components.

First, the configuration of the gate signal output device of the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of the gate signal output device of the present embodiment. As shown in FIG. 1, the gate signal output device according to the present embodiment includes a carrier generation circuit 100, a connection ratio setting register group 200, a connection real time creation circuit group 300, a dead time creation circuit group 400, a bidirectional switch It comprises a connection distribution circuit 80, an input / output phase information register 220, gate signal output terminals 601 to 612, and a mode switching switch 9. A carrier generation circuit 100;
The connection ratio setting register group 200, the connection real time creation circuit group 300, the dead time creation circuit group 400, the bidirectional switch connection distribution circuit 80, the input / output phase information register 220, the gate signal output terminals 601 to 612, Performs the operation as described above. Mode switch 9
Is used in a three-phase PWM inverter device,
The connection real time creation circuits 301 to 312 and the dead time creation circuits 401 to 412 are respectively connected to form three-phase / 3
When used in the phase PWM cycloconverter device, the connection real-time creation circuits 301 to 312 and the bidirectional switch connection distribution circuit 80 are connected.

Next, the operation of the gate signal output device of this embodiment will be described with reference to FIGS. FIG.
The gate signal output device of the present embodiment is a three-phase three-level PWM
Three-phase three-level PWM when connected to an inverter device
FIG. 3 is a block diagram illustrating a configuration of an inverter device. The AC voltage supplied from the three-phase power supply 1 is subjected to full-wave rectification by a rectifier diode bridge 4 as a converter to become a DC voltage. The DC voltage is input to a three-phase three-level PWM inverter, and the three-phase three-level PWM inverter is driven by switching of each of the IGBTs 15-26.
A three-phase AC voltage is output to three loads 3 of a phase, a V phase, and a W phase. As shown in FIG. 2, the gate signal output terminals 601 to 612 of the gate signal output device 5 of the present embodiment are connected to the gate driver 60. Gate signals 501 to 5 output from gate signal output terminals 601 to 612
12 is amplified by the gate driver 60 and each IGBT 15
To IGBTs to perform switching of each of the IGBTs 15 to 26.

When connected to a three-phase three-level PWM inverter device, the mode changeover switch 9 of the gate signal output device 5 of the present embodiment
1 to 312 and the dead time creation circuits 401 to 412, respectively.

The connection ratio setting registers 201 to 212 store each IG with respect to the time of one cycle of the PWM carrier signal.
The ratio of the connection time of the switching patterns of the BTs 15 to 26 is stored. Connection real-time creation circuits 301-31
2 is calculated from the connection ratio and the time of one cycle of the PWM carrier signal output from the carrier generation circuit 100.
Each IGBT 15-2 in one cycle of WM carrier signal
The connection real time of the switching pattern 6 is created and output. The mode change switch 9 includes connection real time creation circuits 301 to 312 and dead time creation circuits 401 to 41.
2, the actual connection time of the switching pattern of each of the IGBTs 15 to 26 is input to the dead time creation circuits 401 to 412, respectively. Dead time creation circuits 401 to 412 are connected real time creation circuit 301.
From the connection real time of the switching patterns of the IGBTs 15 to 26 output from the IGBTs 15 to 26
Each IGB by subtracting the dead time to prevent short circuit
Gate signals 501 to 512 for T15 to T26 are created, and the gate signals 501 to 512 are output to gate signal output terminals 601 to 612, respectively. Each gate signal 5
01 to 512 are amplified by the gate driver 60 and input to the IGBTs 15 to 26, and the IGBTs 15 to
26 are performed.

The gate signal output device 5 of the present embodiment
Can output twelve gate signals. And
The number of gate signals required for the three-phase two-level PWM inverter device is six. Therefore, the gate signal output device 5 of the present embodiment can also be used as a gate signal output device of a three-phase two-level PWM inverter device.

FIG. 3 is a block diagram showing the configuration of a three-phase / 3-phase PWM cycloconverter device when the gate signal output device 5 of the present embodiment is connected to a three-phase / 3-phase PWM cycloconverter device.

The AC voltage supplied from the three-phase power supply 1 is output to the three-phase / three-phase cycloconverter via the input filter 2. In the three-phase / 3-phase cycloconverter device, the U-phase, V-phase, and W-phase
A three-phase AC voltage of an arbitrary frequency is output to the three loads 3 of the phase. Each of the U-phase, V-phase, and W-phase is provided with a current detector 6 for detecting an output current. The output of the current detector 6 is input to the commutation control circuit 50.

As shown in FIG. 3, the gate signal output terminal 6
01 to 612 are connected to the commutation control circuit 50.
The commutation control circuit 50, the current detector ₆₁ with the polarity of the current detected from the 6 _3, controls each of the commutation sequence of IGBT70,71 which are provided two per each bidirectional switch Is what you do. The gate signal output terminals 601 to 612 of the gate signal output device 5 of the present embodiment are connected to the commutation control circuit 50. Commutation control circuit 50
Receives the gate signals 601 to 609 from the gate signal output terminals 601 to 609, based on the polarity of the current detected from the current detector ₆₁ through _3, the bidirectional switch 51 to
18 gate signals to the IGBTs 70 and 71 included in 59 are created. The created 18 gate signals are amplified by the gate driver 60, and each of the bidirectional switches 51 to 5
9 is input to each of the IGBTs 70 and 71.

The connection real time creation circuit group 300 includes a switching pattern SP0 for one cycle time of the PWM carrier signal obtained from the connection ratio setting register group 200.
From the ratio of the connection time of h, SP1h, SP0m, and SP1m, the connection real time of each switching pattern SP0h, SP1h, SP0m, and SP1m in one cycle of the PWM carrier signal is created. The mode changeover switch 9 of the gate signal output device 5 connects the connection real-time creation circuit group 300 and the bidirectional switch connection distribution circuit 80. Therefore, each connection real time created by the connection real time creation circuits 301 to 304 is input to the bidirectional switch connection distribution circuit 80. Bidirectional switch connection distribution circuit 80
Are the switching patterns SP0h, SP1h, SP
0m, SP1m and the gate signals 501 to 501 based on the phase information such as the phase of the input current and the phase of the output phase voltage of the R phase of the three-phase AC power supply stored in the input / output phase information setting register 220. 509, and outputs the gate signals 501-509 to gate signal output terminals 601-60.
9 is output.

The commutation control circuit 50 controls each of the two IGBTs of the two-way switch based on the gate signals 501 to 509 output from the gate signal output device 5 and the polarity of the current input from the current detector 6. The commutation order is controlled, and 18 gate signals for driving each IGBT are output to the gate driver 60 to control each IGBT.

As described above, the gate signal output device 5 of the present embodiment is a part required for the gate signal output device of the three-phase PWM inverter device and the gate signal output device of the three-phase / 3-phase PWM cycloconverter device. It has the necessary parts, and is equipped with the mode changeover switch 9 so that it can be used for both a three-phase PWM inverter device and a three-phase / 3-phase PWM cycloconverter device. Therefore, a gate signal output circuit can be shared when developing a three-phase PWM inverter device or a three-phase / 3-phase PWM cycloconverter device.
The development cost and the development period of the phase PWM inverter device and the three-phase / 3-phase PWM cycloconverter device can be reduced.

In the gate signal output device 5 of the present invention, the gate signal output terminal to the inverter device and the gate signal output terminal to the cycloconverter are shared. Therefore, the gate signal output device 5 of the present invention
This has the advantage that the number of output pins can be reduced when it is configured by a digital device such as an IC.

[0036]

As described above, in the gate signal output device of the present invention, the gate signal for switching a plurality of semiconductor switching elements of the three-phase PWM inverter device and the three-phase / 3-phase PWM cycloconverter device are provided. A gate signal for switching a plurality of bidirectional switches can be output.

Therefore, when developing a three-phase PWM inverter device or a three-phase / 3-phase PWM cycloconverter device, it is possible to use the gate signal output device of the present invention to make the gate signal output device common. it can.
Therefore, a three-phase PWM inverter device or a three-phase / 3-phase PW
The development cost and development period for developing the M cycloconverter device can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a gate signal output device according to an embodiment of the present invention.

FIG. 2 shows a gate signal output device according to an embodiment of the present invention;
3 when connected to a phase 3 level PWM inverter device
It is a block diagram showing composition of a phase 3 level PWM inverter device.

FIG. 3 shows a gate signal output device according to an embodiment of the present invention;
FIG. 3 is a block diagram illustrating a configuration of a three-phase / 3-phase PWM cycloconverter device when connected to a three-phase / 3-phase PWM cycloconverter device.

FIG. 4 is an equivalent circuit diagram showing a main circuit configuration of a three-phase three-level PWM inverter device.

FIG. 5 is a block diagram showing a configuration of a conventional gate signal output circuit used in a three-phase three-level PWM inverter device.

FIG. 6 is an equivalent circuit diagram showing a main circuit configuration of a three-phase / 3-phase PWM cycloconverter device.

FIG. 7 is a block diagram showing a configuration of a conventional gate signal output circuit used in a three-phase / 3-phase PWM cycloconverter device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 3-phase power supply 2 Input filter 3 Load 4 Rectifier diode bridge 5 Gate signal output device 6 Current detector 9 Mode changeover switch 10 Intermediate point 11, 12 Input terminal 13, 14 Capacitor 15-26, 70, 71 IGBT 27-44, 72, 73 Diode 40 Bidirectional switch connection and distribution circuit group 50 Commutation control circuit 51 to 59 Bidirectional switch 60 Gate driver 61 to 63 Input terminal 64 to 66 Output terminal 80 Bidirectional switch connection and distribution circuit 100 Carrier generation circuit 200 Connection ratio Setting register group 201 to 212 Connection ratio setting register 220 I / O information setting register 300 Connection real time creation circuit group 301 to 312 Connection real time creation circuit 400 Dead time creation circuit group 401 to 412 Dead time creation circuit 501 to 512 Gate signal No. 601 to 612 Gate signal output terminal

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidenori Hara 2-1 Kurosaki Castle Stone, Yawatanishi-ku, Kitakyushu City, Fukuoka Prefecture Inside Yaskawa Electric Co., Ltd. (72) Inventor Shunichi Sakata 2-1 Kurosaki Castle Stone, Yawatanishi-ku, Kitakyushu City, Fukuoka Prefecture F term in Yaskawa Electric Co., Ltd. (reference) 5H007 CA01 CB05 CC23 DB07 EA03 EA13 5H750 BA01 BA06 CC06 DD14 DD18 FF02

Claims (2)

[Claims] 1. A carrier generating means for generating a PWM carrier signal; a plurality of connection ratio setting registers each storing a ratio of a connection time of a plurality of switching patterns to a period of one cycle of the PWM carrier signal; The ratio of the connection time of each switching pattern stored in the connection ratio setting register and the PWM
A plurality of connection real time creation circuits for respectively creating connection real time of each of the switching patterns in one cycle of the PWM carrier signal from one cycle time of the carrier signal; Then, a dead time for preventing short circuit between the semiconductor switching elements is subtracted from each connection real time to obtain a three-phase P.
A plurality of dead time generating circuits for respectively outputting gate signals to a plurality of semiconductor switching elements provided in a WM inverter device; a phase of a voltage input to a three-phase / 3-phase PWM cycloconverter device; An input / output phase information setting register for storing a phase of an output voltage command to be output from the PWM cycloconverter; and a connection real time and an input / output phase register created by the connection real time creation circuits. A bidirectional switch connection / distribution circuit that outputs a gate signal to a plurality of bidirectional switches provided in the three-phase / three-phase PWM cycloconverter device based on the stored phases; The dead time creation circuit is connected to the bidirectional switch connection distribution circuit. A plurality of output terminals for respectively outputting the respective gate signals output from the two-way switch connection distribution circuit; and, when used in the three-phase PWM inverter device, the connection real-time generation circuit and the dead time generation. And a switching means for connecting the connection real-time creation circuit and the bidirectional switch connection distribution circuit when the circuit is used in the three-phase / three-phase PWM cycloconverter. apparatus. 2. The carrier generating means, the connection ratio setting registers, the connection real time creation circuits, the dead time creation circuits, the input / output phase information setting registers, and the bidirectional switch connection. An ASIC in which a distribution circuit, each of the output terminals, and the switching means are integrated.
2. The gate signal output device according to claim 1, comprising: