JPH09149691A - Group-control inverters - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the relative control and the independent control of group- control inverters which control the rotations of induction motors without providing an external controller by a method wherein functions by which at least one type of data among parameters, operation commands, frequency commands and monitored data are mutually communicated are added to the functions of the respective group-control inverters. SOLUTION: In respective group-control inverters 3a-3d, communication control processing units 6 to which signals from parameter units 4 and communication input signals 8 are inputted and which output communication output signals 7 to the outside are provided in arithmetic units 5 which generate control signals for the revolutions of respective induction motors 2a-2d. Then, mutual communication functions by which the bus-bar connections or the serial connections of data such as parameters, operation commands, frequency commands and monitored data are realized are provided. With this constitution, the independent control or the relative control, i.e., one of the machines is treated as a master and the other machines are treated as servants, of the induction motors 2a-2d can be performed without providing an external batch control/command apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a group control inverter device for group controlling an inverter device for frequency controlling an apparatus such as an induction motor whose frequency output is changed by changing the frequency. It is preferably used for speed control of a plurality of electric motors in a rolling system, a spinning production system such as winding a yarn or conveying a fabric, and an extrusion molding system.

[0002]

2. Description of the Related Art FIG. 10 is a block diagram of an overall schematic configuration showing a conventional inverter device. In the figure, 1 is an input AC power supply such as a commercial power supply, 2 is an induction motor driven by an inverter device 30, 30 is an inverter device, and a converter unit 31 for converting AC to DC and a converter unit 31
It has an inverter section 32 for converting the direct current obtained in step 1 into an alternating current of a predetermined frequency. 4 is a parameter unit for inputting parameter settings, operation commands, frequency commands, etc. to the inverter device 30, 5 is a calculation unit for controlling the inverter device 30, 6 is a communication control processing unit for reading communication signals from the outside, Reference numeral 8 is a communication input signal from the outside. The conventional inverter device 30 configured in this way
Gives a communication input signal 8 from the outside and data such as parameters set by the parameter unit, operation commands, and frequency commands, so that the induction motor 2 is operated with a predetermined frequency output.

FIG. 11 is a block diagram for performing group control by connecting a plurality of conventional inverter devices. Note that the same reference numerals and symbols as those in FIG. 10 indicate the same or corresponding components as those of FIG. 10, and therefore, redundant description will be omitted here. Reference numeral 12 is a command device composed of a personal computer that gives a command to the plurality of inverter devices 30, and the command device 12 transmits the communication input signal 8 assigned to the plurality of inverter devices 30 based on its own clock. , And outputs respective control signals to the plurality of inverter devices 30.

FIG. 12 is a block diagram of an overall schematic configuration showing a frequency command of a conventional inverter device, and FIG.
3 is a frequency-time characteristic diagram of a conventional inverter device. In FIG. 12, 13 is a frequency command device that gives a frequency command signal to the inverter device 30, and as shown in FIG. 13, after the frequency command device 13 outputs the frequency command signal of the frequency f2, it is lowered to the frequency f1. It is a steady state at the frequency f1. In the inverter device 30 of this type, the frequency command device 13 that gives the frequency command signal lowers the frequency from the frequency command signal of the frequency f2 to the frequency f1 and outputs the frequency command signal that is in the steady state at the frequency f1. At this time, in order to bring the frequency f2 to the steady state of the frequency f1, the inverter device 3
A delay time t1 is generated which is determined by the response speed of zero. The delay time period t1 is determined by the response speed of each inverter device 30, and varies depending on each inverter device 30.

FIG. 14 is an overall block diagram showing group control of frequency commands of another conventional inverter device.
FIG. 15 is a block diagram showing an overall schematic configuration of another conventional inverter device 30, and FIG. 16 is an input voltage-time period characteristic diagram (a) and a frequency-time period characteristic diagram (b) during an instantaneous power failure. . In the figure, reference numeral 12 is a command device that gives a command to a plurality of inverter devices 30.
Transmits a communication input signal 8 to a plurality of frequency command devices 13. Reference numeral 13 is a frequency command device that gives a frequency command signal to the inverter device 30. When the frequency command device 13 is outputting the frequency command signal 14 of frequency f2, an AC power supply instantaneous power failure occurs, and it is restored after t2. It is an example of. At this time, the frequency f1 is gradually decreased only during the time period t2 due to the occurrence of the AC power supply instantaneous power failure, and when the input is restored, it returns to the steady state with the delay of the time period t3.

Next, in the case of dealing with the momentary power failure of the AC power source, as in the conventional example of FIG. 15, in order to extend the time period in which the operation can be continued, as shown in FIG. The rotation output is sequentially decreased only during the period, the bus voltage is prevented from decreasing due to the regenerative energy, and the AC power supply is restored to restore the steady state during the time period t3. This prevents the output of the inverter device 30 from dropping sharply when an AC power supply instantaneous power failure occurs. At the time of restoration of the AC power supply, the rise is delayed only by preventing the output of the inverter device 30 from abruptly decreasing when the AC power supply instantaneous power failure occurs. That is, the time limit t3
Just after that, the steady state is entered.

[0007]

As shown in FIG. 10, a conventional inverter device 30 has a communication input function for receiving a communication input signal 8. When performing communication, the inverter device 30 shown in FIG. As shown in, a plurality of inverter devices 30 are connected to the command device 12 such as a personal computer and a sequencer, and communication is performed by a communication program executed by the command device 12. In addition, when the same condition setting or different condition setting is performed for each inverter device 30, the command device 12 uses the plurality of inverter devices 30.
Are set collectively or individually.

When it is desired to arbitrarily set the time period t1 from the current frequency f1 to the next reaching frequency f2, the frequency command is input from the external frequency command device 13 as shown in FIG. 30 frequency controls are performed. When this control is performed by a plurality of inverter devices 30, a command is input from the frequency command device 13 to each inverter device 30 as shown in FIG. Further, in the case of dealing with the momentary power failure of the AC power source, as in the conventional example of FIG. 15, in order to extend the time period in which the operation can be continued, as shown in FIG. By doing so, the regenerative energy is used to prevent the drop of the bus voltage, and the power source is restored to restore the steady state during the time period t3.

Thus, the conventional inverter device 30
In order to control a plurality of inverter devices 30, first, it is necessary to set a communication program in the command device 12 such as a personal computer or a sequencer, and when the command is input, the respective inverter devices are also to be set. It was necessary to carry out 30 from the command device 12 individually. That is, the frequency command device 13 and the like are required outside, and the system becomes complicated and inevitably expensive. Moreover, in particular, in the case of an inverter device for a winding motor, a plurality of inverter devices collectively control the entire system at different frequencies. The time required is different, and the entire system must be stopped and then restarted.

In view of the above, the present invention provides a group control inverter device capable of performing relative control and independent control with respect to another inverter device without performing collective control of a plurality of inverter devices from an external control device. The second object is to provide a group control inverter device capable of continuing operation without temporarily stopping the entire system even when an instantaneous power failure occurs.

[0011]

A group control inverter device according to a first aspect of the present invention comprises a converter section for converting alternating current into direct current and an inverter section for converting direct current obtained by the converter section into alternating current of a predetermined frequency. In the group control inverter device, which has an AC power output from the inverter unit and supplies the induction motor with rotation speed control of a plurality of induction motors independently, the group control inverter device includes parameter data and operation command data. , One or more data of frequency command data and monitor data are mutually communicated, and these data can be transmitted to other devices by mutual data communication of parameters, operation commands, frequency commands and monitor data. it can.

According to a second aspect of the present invention, there is provided a group control inverter device in which the communication output of the first aspect is input to the plurality of group control inverter devices, and the communication output is input to the plurality of group control inverter devices. In order to input the communication output from the device, a plurality of the group control inverter device is connected, the communication output and a plurality of inputs,
Moreover, since a plurality of outputs can be output, a plurality of inverter devices can be connected for communication.

According to a third aspect of the present invention, there is provided a group control inverter device for outputting the mutual communication of the data according to the first aspect or the second aspect, by adding an arbitrary correction to the communication input and outputting the communication. It is possible to output by adding arbitrary correction to the input.

According to a fourth aspect of the present invention, there is provided a group control inverter device for performing the mutual communication of the data according to any one of the first to third aspects, in order to sequentially issue a command from one group control inverter device. Of the first group control inverter device,
The second group control inverter device receives the command and outputs the command to the third group control inverter device. That is, the command of the first inverter device can be continuously and sequentially input to the other group control inverter devices.

According to a fifth aspect of the present invention, there is provided a group control inverter device for converting the direct current into the alternating current of a predetermined frequency in the inverter part according to any one of the first to fourth aspects. The time limit from the frequency of to the next desired reaching frequency is arbitrarily set,
The time limit from the current frequency to the next frequency can be set with a parameter.

According to a sixth aspect of the present invention, there is provided a group control inverter device for converting the direct current to the alternating current of a predetermined frequency in the inverter part according to any one of the first to fifth aspects. This is to decelerate and accelerate the time from the frequency to the next desired frequency in the same time, and the time from the current frequency of the multiple group control inverter device to the next frequency can be set arbitrarily. It can be set with the parameter.

According to a seventh aspect of the present invention, there is provided a group control inverter device, wherein the converter section for converting the alternating current into the direct current according to any one of the first to sixth aspects is separated to form a separate common converter. The operation continuation time period is decelerated and accelerated in the same time period for multiple inverter units during an instantaneous power failure.By separating the converter section, it becomes a separate common converter, and the operation continuation time period is extended due to an AC power source instantaneous power failure. Can be achieved by simultaneously decelerating a plurality of group control inverter devices, and a plurality of group control inverter devices can be accelerated / decelerated in the same time period.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION A group control inverter device according to an embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same reference numerals and symbols as those in the conventional example denote the same or corresponding components as those in the conventional example.

Embodiment 1 FIG. 1 is a block diagram showing an overall schematic configuration of a group control inverter device which constitutes a group control inverter device according to a first embodiment of the present invention. In FIG. 1, 1 is an input AC power supply such as a commercial power supply, and 2
Is an induction motor in which the output speed depends on the input frequency, 3 is a group control inverter device according to the present embodiment, and 4 is a parameter for giving data such as parameter setting, operation command and frequency command to the group control inverter device 3. A unit, 5 is an arithmetic unit including a microcomputer for controlling the group control inverter device 3, 7 is a communication output signal output to the outside by bus coupling or serial coupling, and 8 is input from the outside by bus coupling or serial coupling. Communication input signal. A communication control processing unit 6 is operated by the arithmetic unit 5 in response to the input from the parameter unit 4 and the communication input signal 8 to control the rotation speed of the induction motor 2 and to output the communication output signal 7 to the outside as necessary. Is.

Therefore, the group control inverter device 3
Is to obtain the function of communicating and outputting data such as parameters, operation commands, frequency commands, and monitor data set by the parameter unit 4 by bus coupling or serial coupling. At this time, as the communication output signal 7,
The number of rotations of the corresponding induction motor 2 can be output individually, or the number of rotations of which a specific induction motor 2 is the main, another induction motor 2 is the slave, and another induction motor 2 is the slave can be output.

FIG. 2 is a schematic block diagram showing an overall schematic configuration of group control of the group control inverter device according to the first embodiment of the present invention. In the figure, the same reference numerals and symbols as in FIG.
Since the components are the same as or corresponding to the components of the above, duplicate description will be omitted here. In FIG. 2, the group control inverter device 3 shown in FIG. 1 has a configuration for performing group control by setting the input and output so that the communication output signal 7 to the outside becomes the communication input signal 8 of the other party. It is a thing. Reference numerals 3a, 3b, 3c and 3d denote the group control inverter device 3 shown in FIG. In addition, throughout the whole, the subscripts a, b, c, d (A, B, C) indicate that they correspond to the induction motors 2a, 2b, 2c, 2d performing different operations.

For example, when this embodiment is used as a group control inverter device for a motor for a winding machine, a plurality of group control inverter devices 3a, 3b, 3 will be described.
c and 3d collectively control the entire system at different frequencies. It is assumed that the group control inverter device 3a is driven and simultaneously rotates at a constant rotation speed N, and at that time, the group control inverter device 3b is changed to the group control inverter device 3a.
It is assumed that the group control inverter device 3c is driven with a delay of T1 from the drive of T1 and rotates at a constant rotation speed of 0.8N, the group control inverter device 3c is driven with a delay of T2 from the drive of the group control inverter device 3a, and the average for one minute is 0. 9N, the group control inverter device 3d is driven with a delay of T3 from the driving of the group control inverter device 3a, and the average for 3 minutes is 1.
When rotating at 5N, group control inverter device 3
a outputs the communication output signal 7 to the group control inverter devices 3b, 3c, 3d, and the induction motors 2a, 2d are controlled by the group control inverter devices 3a, 3b, 3c, 3d.
The speed of b, 2c, and 2d can be controlled.

Further, the control can be performed as follows.
When it can be assumed that the group control inverter device 3a is driven and simultaneously rotates at a constant number of revolutions N, the group control inverter device 3a transmits a communication output signal 7, which the group control inverter device 3b uses as a communication input signal 8. Received,
The group control inverter device 3b is driven with a delay of T1 from the driving of the group control inverter device 3a, and the data for rotating at a constant rotation speed of 0.8 N is input to the arithmetic unit 6 of the group control inverter device 3b. Put in. At the same time, the next group control inverter device 3c and group control inverter device 3
Since the data of d also arrives, the group control inverter device 3
As the data of c, the group control inverter device 3b is driven with a delay of T2 -T1 from the drive, and the average for one minute is 0.
The communication output signal 7 is generated so as to rotate at 9N and is output. Similarly, the group control inverter device 3c is driven with a delay of T2-T1 from the group control inverter device 3b,
It receives the communication output signal 7 commanded to rotate at an average speed of 0.9 N for one minute, and takes it in the arithmetic unit 6 of the group control inverter device 3c. Then, the data of the group control inverter device 3d is processed so that the group control inverter device 3d starts driving the group control inverter device 3c to T3.
-T2-T1 drive with a delay, and the average of 3 minutes is 1.
The communication output signal 7 is transmitted so as to rotate at 5N. In this way, each group control inverter device 3a, 3b, 3c,
The arithmetic unit 6 of 3d processes its own captured data and other data to be transmitted, and sequentially transmits the processed data.

Also, each group control inverter device 3a, 3
The arithmetic unit 6 of b, 3c, and 3d separates the self-acquisition data and the data to be transmitted to others, and sequentially transmits them to the next group control inverter devices 3b, 3c, and 3d. The communication input signal 8 arriving at the devices 3b, 3c, 3d causes the communication output signal 7 to be transmitted next by the parameter unit 4 for giving parameter settings, operation commands, frequency commands, etc. of the group control inverter devices 3b, 3c, 3d. It can also be set.

Embodiment 2 FIG. 3 is a schematic block diagram showing an overall schematic configuration of group control of a group control inverter device according to a second embodiment of the present invention. In the figure, the same reference numerals and symbols as those of the first embodiment show the same or corresponding components as those of the first embodiment, and therefore, redundant description will be omitted here. In FIG. 3, reference numeral 9 denotes an input signal correction unit that can correct the communication input signal 7. In this embodiment, the group control inverter device 3
The configuration is such that a plurality of a, 3b, 3c, and 3d perform group control.

That is, in this embodiment, as described above, each group control inverter device 3a, 3b, 3c, 3d.
The arithmetic unit 6 can process its own captured data and other data to be transmitted, and sequentially transmit the processed data. However, at this time, when the group control inverter device 3a is driven and simultaneously rotates at the constant number of revolutions N, the group control inverter device 3a transmits a communication output signal 7, which the group control inverter device 3b communicates. The signal is received as signal 8, and the group control inverter device 3b is driven with a delay of T1 from the driving of the group control inverter device 3a, and the rotation speed is 0.8N.
Suppose you input data that rotates at a constant rate. Even if there is no rise delay in the group control inverter device 3a, the group control inverter device 3b does not
As the data of c, the group control inverter device 3b is driven with a delay of T2 -T1 from the drive, and the average for one minute is 0.
Even if the communication output signal 7 is generated so as to rotate at 9N, when the group control inverter device 3b is driven with a delay of T2-T1 from the drive, the increase in the rotation speed may be delayed due to the load of the induction motor 2b. In such a case, the input signal correction unit 9 corrects the communication input signal 7 so that the group control inverter device 3b is driven with a delay of T2-T1 ± α.

In this example, the group control inverter device 3
Although the data transmission from the group b inverter device 3c to the group control inverter device 3c has been described, the group control inverter device 3a to the group control inverter device 3b and the group control inverter device 3 are described.
b to the group control inverter device 3c, and the group control inverter device 3c to the group control inverter device 3d, similarly, the group control inverter devices 3a, 3b, 3c,
The arithmetic unit 6 of 3d can process its own captured data and other data to be transmitted, and further, the input signal correction unit 9 can correct the communication input signal 7 and sequentially transmit it. Data such as parameters, operation commands, frequency commands, and monitors are operated by the parameter unit 4 to start operation, rotation speed, rotation rising speed, rotation falling speed,
It is possible to communicate data such as correction of transport disturbance due to the difference in the number of rotations, and the relationship between load and slip. Further, it is also possible to add data from a sensor (not shown) and correct it.

Embodiment 3. FIG. 4 is a schematic block diagram showing an overall schematic configuration of group control of a group control inverter device according to a third embodiment of the present invention, and FIG. 5 is a group control of the group control inverter device according to the third embodiment of the present invention. It is a characteristic diagram which shows the frequency change timing by. In the figure,
The same reference numerals and symbols as those of the first embodiment show the same or corresponding components as those of the first embodiment, and therefore, duplicated description will be omitted here. In FIG.
Reference numeral 10 denotes a storage unit that is a non-volatile memory that stores an input signal. This embodiment also adopts a configuration in which group control is performed by a plurality of group control inverter devices 3a, 3b, 3c, 3d. In this embodiment, each group control inverter device 3a, 3b, 3c, 3d is self or other parameters, self and other parameters, operation command,
Holds data such as frequency command and monitor, and holds data such as self and / or other parameters, operation command, frequency command and monitor at the time of momentary power failure or power cutoff to restore or restart power. When the power supply is turned on, and further when the failure is recovered, it is read from the storage unit 10 and the stored contents are read by the self and / or other group control inverter devices 3a,
3b, 3c, 3d can be used. Of course, FIG.
As shown in, the next arrival frequency f from the current frequency f2
Timed Too up to 1 and group control inverter device 3
It is possible to arbitrarily set the delay time and the like among a, 3b, 3c and 3d and store them.

Embodiment 4 FIG. 6 is a schematic block diagram showing an overall schematic configuration of group control of a group control inverter device according to a fourth embodiment of the present invention, and FIG. 7 is an operation end timing by group control of the group control inverter device according to the fourth embodiment of the present invention. FIG. In the figure, the same reference numerals and symbols as those of the above-described embodiment indicate the same or corresponding components as those of the above-described embodiment, and thus the duplicated description will be omitted. In the present embodiment, the input signal correction unit 9 that can correct the communication input signal 7
And a storage unit 10 including a non-volatile memory for storing an input signal. This embodiment also adopts a configuration in which three group control inverter devices 3a, 3b, 3c perform group control. is there.

In this embodiment, a parameter unit 4 for inputting data of parameters, operation commands, frequency commands, monitors, etc. of the group control inverter device 3a among the three group control inverter devices 3a, 3b, 3c. The timing for ending the operation is set by. By setting the operation end timing data by the parameter unit 4 of the group control inverter device 3a, the operation end timing data is also transmitted to the two group control inverter devices 3b and 3c, and the current three units are set. Output frequencies f1 of the group control inverter devices 3a, 3b, 3c,
Set so that f2 and f3 stop at the stop time Toe.
Therefore, the three group control inverter devices 3a, 3
Even if the output frequencies f1, f2, f3 of b, 3c are different from each other, the stop time Toe can be made constant, and the induction motor 2
Due to the uneven stop of a, 2b, and 2c, the quality of the manufactured product flowing in the manufacturing process is not deteriorated.

Embodiment 5. FIG. 8 is a schematic block diagram showing the overall schematic configuration of group control of the group control inverter device according to the fifth embodiment of the present invention, and FIG. 9 is an input voltage by the group control of the group control inverter device according to the fifth embodiment of the present invention ( It is a characteristic view of a), the DC output (b) of a converter apparatus, and an inverter output frequency (c). In the figure, the same reference numerals and symbols as those of the above-described embodiment indicate the same or corresponding components as those of the above-described embodiment, and thus the duplicated description will be omitted. The group control inverter device 3 described above includes the converter unit 31 that converts alternating current into direct current.
And an inverter section 32 for converting the direct current obtained by the converter section 31 into an alternating current having a predetermined frequency. In the group control inverter devices 3a, 3b, 3c of the present embodiment,
The converter unit 31 for converting alternating current to direct current is taken out to form an independent common converter 310, and the group control inverter devices 3A, 3B, 3C include the inverter units 32a, 32b, 3
Although it has 2c, it does not have a converter section for converting AC to DC. Other configurations are the same as the configurations of the embodiment shown in FIG.

The group control inverter device according to the present embodiment includes three group control inverter devices 3a, 3b and 3c.
It adopts a configuration for performing group control with, and can be controlled as follows. In this embodiment, the common converter 310 converts AC input from the AC power supply 1 into DC, and outputs the steady state output of the common converter 310 to the capacitors Ca, Cb, Cc of the group control inverter devices 3a, 3b, 3c. A DC voltage Vc is applied to. At this time, each group control inverter device 3a, 3b,
The induction motors 2a, 2b, 2c connected to 3c are output frequencies f from the group control inverter devices 3A, 3B, 3C.
It is rotating at 1, f2 and f3. At this time, it is assumed that a power failure occurs at timing Es. At this point, it is not possible to determine whether or not there is an instantaneous power failure, but it is presumed to be an instantaneous power failure, and the inverter unit 3 for group control is controlled only from the timing Es to the time Th.
A, 3B and 3C are outputs of frequencies f1, f2 and f3. As a result, each group control inverter device 3a, 3
The voltage of the capacitors Ca, Cb, Cc of b, 3c rapidly decreases from the voltage Vc before the power failure until then to the voltage Vb.

After a lapse of the time Th from the power failure occurrence timing Es, the output frequencies f1, f2, f3 from the group control inverter devices 3A, 3B, 3C are gradually decreased. As a result, the regenerative energy of the induction motors 2a, 2b, 2c reduces the voltage reduction rate of the capacitors Ca, Cb, Cc of each group control inverter device 3a, 3b, 3c.
Even if the power failure continues for a long time in this state, the output from the group control inverter devices 3A, 3B, 3C maintains the control pull-in area of the induction motors 2a, 2b, 2c during that time.
Incidentally, when the power failure is restored at the timing Ee after the lapse of the time Th + T01 from the timing Es of the power failure occurrence, the capacitors Ca, C of the group control inverter devices 3a, 3b, 3c.
The voltage suddenly rises from the DC voltage Va of b and Cc, and
Then, the group control inverter devices 3A, 3B, 3C before the power failure output the frequencies f1, f2, f3, and the voltage returns to the DC voltage Vc before the power failure. When a power failure including an instantaneous power failure occurs, the output of the common converter 310 causes the capacitors Ca, Cb, Cc of the group control inverter devices 3a, 3b, 3c.
Since the voltage of is always changed uniformly, even if the control of the group control inverter devices 3A, 3B, 3C is performed or even if the control cannot be executed due to a power failure,
It is possible to simultaneously stop the plurality of group control inverter devices 3a, 3b, 3c.

As described above, the group-controlled inverter devices according to the first to fifth embodiments described above convert the alternating current to direct current and the converter 31 to convert the direct current obtained by the converter 31 into alternating current having a predetermined frequency. And an AC power output from the inverter unit 32 is supplied to the induction motors 2a, 2b, 2c, 2d to control the rotation speeds of the induction motors 2a, 2b, 2c, 2d independently. Group control inverter devices 3a, 3b, 3c, 3d, 3A,
In 3B and 3C, the group control inverter devices 3a and 3
b, 3c, 3d, 3A, 3B, and 3C are used to mutually communicate one or more data of parameter data, operation command data, frequency command data, and monitor data, such as parameters, operation commands, frequency commands, and monitors. Of the other group control inverter devices 3a, 3b,
It is possible to transmit these data to 3c, 3d, 3A, 3B and 3C and set them. Therefore, the group control inverter devices 3a, 3b, 3c, 3d, 3A, 3
Data such as parameters, operation commands, frequency commands, and monitors from B and 3C are supplied to a plurality of group control inverter devices 3a,
Communication can be performed only among 3b, 3c, 3d, 3A, 3B, and 3C, the command device 12 such as a personal computer and a communication program are not required, and the group control system to be used can be inexpensive, and its configuration can be improved. Can be simplified. Therefore, a plurality of group control inverter devices 3a, 3
b, 3c, 3d, 3A, 3B, 3C are not collectively controlled from an external control command device such as the command device 12,
Relative control with other and independent control becomes free.

In the group control inverter device of the first to fifth embodiments, the group communication inverter devices 3a, 3b, 3 are used for the mutual communication of the data and the communication output.
c, 3d, 3A, 3B, 3C, and a plurality of group control inverter devices 3a, 3b, 3c, 3d, 3A,
In order to input the communication output from 3B, 3C, a plurality of the group control inverter devices 3a, 3b, 3c, 3d, 3
A, 3B, 3C are connected, and a plurality of communication outputs and inputs can be input and a plurality of outputs can be output. Therefore, a plurality of group control inverter devices 3a, 3b, 3c, 3d,
3A, 3B, 3C can be connected for communication. Therefore, the group control inverter devices 3a, 3b, 3c, 3
Data such as parameters, operation commands, frequency commands, and monitors can be mutually communicated from d, 3A, 3B, and 3C, and a plurality of units can be simultaneously input / output, and mutual communication connection can be arbitrarily set. Group control inverter device 3
a, 3b, 3c, 3d, 3A, 3B, 3C can be communicated only, the command device 12 such as a personal computer and the communication program are unnecessary, and the group control system to be used can be inexpensive, and The configuration can be simplified. Therefore, a plurality of group control inverter devices 3a, 3
b, 3c, 3d, 3A, 3B, 3C are not collectively controlled from an external control command device such as the command device 12,
Relative control with other and independent control becomes free.

The group control inverter devices of the second and fourth embodiments output mutual communication of the data after the communication input is subjected to arbitrary correction by the input signal correction unit 9. , It is possible to output by adding any correction to the communication input. Therefore, data such as parameters, operation commands, frequency commands, and monitors can be corrected and output as communication outputs from the group control inverter devices 3a, 3b, 3c, and 3d, and input data can also be corrected. It is possible to improve the reliability of the system. Therefore, the command device 12 such as a personal computer and the communication program are not required externally, the group control system can be inexpensive, and the configuration thereof can be simplified. Therefore, a plurality of group control inverter devices 3a, 3b, 3c, 3d can be controlled relative to each other and independently without being collectively controlled from an external control command device such as a command device.

In the group control inverter device of the first to fifth embodiments, the mutual communication of the data is performed by sequentially issuing commands from one group control inverter device 3a, 3A to another group control inverter device. Devices 3b, 3c, 3d, 3B,
3C, and receives the command of the first group control inverter device 3b, 3B, the second group control inverter device 3c, 3C receives the command and the third group control The instruction is output to the inverter device 3d for use. That is, the command from the first inverter device 3a, 3A is transmitted to the other group control inverter devices 3b, 3c, 3d, 3B,
It can be input to 3C sequentially and continuously. Therefore, the group control inverter devices 3a, 3b, 3c, 3d, 3A, 3B,
When communication is performed with a plurality of 3Cs, a command such as a parameter of one group control inverter device 3a, 3A is automatically transmitted to the other group control inverter devices 3b, 3c, 3d, 3B ,.
Since it can be input to 3C, the setting only needs to be done once, and the time limit for command input work can be shortened. Therefore, a plurality of group control inverter devices 3a, 3b, 3c, 3d, 3A, 3B, 3C are not controlled collectively from an external control command device such as the command device 13, but can be controlled independently from each other. Control is free.

In the group control inverter device of the first to fifth embodiments, the conversion of the direct current into the alternating current of the predetermined frequency in the inverter part 31 is performed from the current frequency f2 of the alternating current power to the next desired frequency. The time Too until reaching the reaching frequency f1 or the time Toe until reaching the next desired reaching frequency 0 from the current frequencies f1, f2, f3 is arbitrarily set, and the current frequency f2 to the next frequency f1. Time Too or current frequency f1,
The time Toe from f2, f3 to the next desired reaching frequency 0 can be set by a parameter. Therefore, the time T from the current frequency f2 to the next arrival frequency f1
Since the time Toe from oo or the current frequencies f1, f2, f3 to the next desired reaching frequency 0 can be set arbitrarily, it can be configured without providing another device such as the frequency command device 13. The group control system to be used can be inexpensive and the configuration can be simplified. Therefore, a plurality of group control inverter devices 3a, 3b, 3c, 3d, 3
Relative control and independent control with respect to the other units can be freely performed without collectively controlling A, 3B, and 3C from an external control command device such as the command device 13. Therefore, analogically, even if an instantaneous power failure occurs, operation can be continued without stopping the entire system, and the time period from the current frequency to the next arrival frequency can be set arbitrarily.

In the group control inverter device of the first to fifth embodiments, the conversion of the direct current into the alternating current of the predetermined frequency in the inverter part 31 is performed from the present frequency f2 of the alternating current power to the next desired frequency. Time Too until reaching the reaching frequency f1 or time Toe until reaching the next desired reaching frequency 0 from the current frequencies f1, f2, f3, the desired reaching frequency f1 due to power failure recovery from the present frequencies f1, f2, f3 , F2, f3 to time To1 + To2
Are decelerated and accelerated with the same time period Too or time period Toe and time period To1 + To2, and the next frequency is reached from the current frequency f2 of a plurality of group control inverter devices 3a, 3b, 3c, 3d, 3A, 3B, 3C. Time Too until reaching frequency f1 or time Toe from current frequencies f1, f2, f3 to next desired reaching frequency 0, desired frequency f1 due to power failure recovery from current frequencies f1, f2, f3, The time period To1 + To2 up to f2 and f3 can be set with arbitrary parameters. Therefore, a plurality of group control inverter devices 3a, 3b, 3c, 3d, 3A,
Since 3B and 3C are decelerated and accelerated in the same time period Too, a plurality of group control inverter devices 3a, 3b, 3c, 3d, 3A, 3B, 3 are used in applications such as a winder.
It is possible to decelerate and accelerate in the same time period even when C is operating at different frequencies or when a momentary power failure occurs. Prevents breakage and improves reliability. Therefore, analogically, even if an instantaneous power failure occurs, it is possible to continue operation without temporarily stopping the entire system.

In the group-controlled inverter device of the fifth embodiment, the converter section 31 for converting the alternating current into the direct current is separated to form a separate common converter 310, and a continuous operation time limit is provided for a plurality of groups when the AC power supply is momentarily interrupted. The control inverter devices 3A, 3B, and 3C are decelerated and accelerated in the same time period, and the common converter 31 is provided by separating the converter unit.
By setting to 0, the extension of the operation continuation time period can be extended by the momentary power failure of the AC power supply.
This is made possible by simultaneously decelerating B and 3C, and a plurality of group control inverter devices 3A, 3B and 3C.
Can be accelerated and decelerated at the same time. Therefore, since the common converter 310 in which the converter unit 31 is separated and installed separately is provided, the plurality of group control inverter devices 3A, 3B, 3C can be provided while further extending the operation continuation time period during the AC power supply momentary power failure. Is used for decelerating and accelerating in the same time period, even if a plurality of group control inverter devices 3A, 3B, 3C are operating at different frequencies in applications such as a winder, an instantaneous power failure will occur. Even if it occurs, deceleration and acceleration can be performed in the same time period, which prevents yarn breakage and improves reliability. Therefore, even if an instantaneous power failure occurs, the operation can be continued without stopping the entire system.

By the way, in each of the above-mentioned embodiments, a plurality of group control inverter devices 3a, 3b, 3c, 3d, 3 are provided.
The case of setting data such as parameters, operation commands, frequency commands, and monitors with a specific one of A, 3B, and 3C has been described, but when the present invention is implemented, a plurality of group control inverters are used. Devices 3a, 3b, 3c, 3d, 3
It is also possible to use two or more of A, 3B and 3C.

[0042]

As described above, the group control inverter device according to claim 1 has the converter section for converting alternating current into direct current and the inverter section for converting direct current into alternating current of a predetermined frequency. In the group control inverter device that supplies the output AC power to the induction motor and independently controls the rotation speed of the plurality of induction motors, the group control inverter device includes parameter data, operation command data, frequency command data, and a monitor. One or more pieces of data are mutually communicated, and parameters, operation commands, frequency commands,
These data can be transmitted and set to other group control inverter devices by data communication of a monitor or the like. Therefore, communication can be performed between a specific group control inverter device and a plurality of group control inverter devices, a command device such as a personal computer and a communication program are unnecessary, and the group control system to be used is inexpensive. In addition, the configuration can be simplified. Therefore,
There is an effect that the plurality of group control inverter devices can be freely controlled relative to each other and independent control without performing collective control from an external control command device such as a command device.

According to a second aspect of the present invention, there is provided a group control inverter device according to the first aspect of the present invention, wherein the data mutual communication is input to the plurality of group control inverter devices and the communication from the plurality of group control inverter devices is performed. In order to input an output, a plurality of the group control inverter devices are connected, and since a plurality of communication outputs and inputs can be input and a plurality of outputs can be output, a plurality of group control inverter devices are connected by communication. can do. Therefore, in addition to the effect described in claim 1, data such as parameters, operation commands, frequency commands, and monitors can be mutually communicated, and a plurality of units can be simultaneously input / output. Connection, bus connection, etc. can be set arbitrarily, so mutual communication can be performed only between multiple group control inverter devices,
The group control system to be used can be inexpensive and the configuration can be simplified.

According to a third aspect of the present invention, there is provided a group control inverter device for outputting the mutual communication of the data according to the first or second aspect of the present invention, after the input signal correcting section adds an arbitrary correction to the communication input. It is possible to output by adding an arbitrary correction to the communication input. Therefore, in addition to the effect described in claim 1 or claim 2, data such as parameters, operation commands, frequency commands, and monitors can be corrected and output as communication outputs, and input data can be corrected. It is also possible to improve the reliability of the system.

According to a fourth aspect of the present invention, there is provided a group control inverter device for performing mutual communication of the data according to any one of the first to third aspects, wherein a command of the first inverter device is another group control inverter. Since the data can be sequentially and continuously input to the device, in addition to the effect according to any one of claims 1 to 3,
When communicating with multiple group control inverter devices,
The command of one group control inverter device can be input to the other group control inverter device, so the setting can be done only once, the time for command input work can be shortened, and moreover, the communication connection can be sequentially connected in runner type. There is.

According to a fifth aspect of the present invention, there is provided a group-controlled inverter device for converting the direct current into the alternating current of a predetermined frequency in the inverter part according to any one of the first to fourth aspects. The time limit from the frequency to the next desired reaching frequency is arbitrarily set, and
In addition to the effect according to any one of claims 4 to 4, since the time period from the current frequency to the next reaching frequency can be set arbitrarily, the frequency setting and the change time period when changing the frequency can be performed. It is not necessary to provide another device such as a frequency command device for setting, the group control system to be used can be inexpensive, and the configuration can be simplified. Furthermore, there is an effect that the time limit from the current frequency to the next arrival frequency can be arbitrarily set.

According to a sixth aspect of the present invention, there is provided a group control inverter device, wherein conversion from direct current to alternating current of a predetermined frequency in the inverter part according to any one of the first to fifth aspects is performed by converting the current of the alternating current power. The time from the frequency to the next desired frequency is decelerated and accelerated in the same time, and the time from the current frequency of the plural group control inverter devices to the next frequency can be set arbitrarily. It can be set with the parameter. Therefore, in addition to the effect according to any one of claims 1 to 5, since a plurality of group control inverter devices are decelerated and accelerated in the same time period, a winder etc. Depending on the application, even when a plurality of group control inverter devices are operating at different frequencies, or even when an instantaneous blackout occurs, deceleration and acceleration can be performed in the same time period. Therefore, even if an electric power outage occurs, it is possible to continue operation without temporarily stopping the entire system.

According to a seventh aspect of the present invention, there is provided a group control inverter device, wherein the converter section for converting the alternating current into the direct current according to any one of the first to sixth aspects is a separate common converter.
When the AC power supply is instantaneously interrupted, the operation continuation period is decelerated and accelerated by multiple inverter units for group control in the same time period.By using a common converter, the operation continuation period can be extended by multiple AC power supply momentary interruptions. It is possible by simultaneously decelerating the group control inverter device of
In addition, it is possible to accelerate and decelerate a plurality of group control inverter devices at the same time. Therefore, since the common converter is provided, the inverter unit for group control can be decelerated and accelerated in the same time period while further extending the operation continuation time period during the AC power supply instantaneous power failure. For example, even if multiple inverters for group control are operating at different frequencies, even if an instantaneous blackout occurs, deceleration and acceleration can be performed at the same time, improving reliability. Become. Therefore, even if an instantaneous power failure occurs, there is an effect that the operation can be continued without stopping the entire system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall schematic configuration of a group control inverter device that constitutes a group control inverter device according to a first embodiment of the present invention.

FIG. 2 is a schematic block diagram showing an overall schematic configuration of group control of the group control inverter device according to the first embodiment of the present invention.

FIG. 3 is a schematic block diagram showing an overall schematic configuration of group control of a group control inverter device according to a second embodiment of the present invention.

FIG. 4 is a schematic block diagram showing an overall schematic configuration of group control of a group control inverter device according to a third embodiment of the present invention.

FIG. 5 is a characteristic diagram showing frequency change timing by group control of a group control inverter device according to a third embodiment of the present invention.

FIG. 6 is a schematic block diagram showing an overall schematic configuration of group control of a group control inverter device according to a fourth embodiment of the present invention.

FIG. 7 is a characteristic diagram showing operation end timing by group control of a group control inverter device according to a fourth embodiment of the present invention.

FIG. 8 is a schematic block diagram showing an overall schematic configuration of group control of a group control inverter device according to a fifth embodiment of the present invention.

FIG. 9 is a characteristic diagram of an input voltage by the group control of the group control inverter device according to the fifth embodiment of the present invention, a DC output of the converter device, and an inverter output frequency.

FIG. 10 is a block diagram of an overall schematic configuration showing a conventional inverter device.

FIG. 11 is a block diagram for performing group control by connecting a plurality of conventional inverter devices.

FIG. 12 is a block diagram of an overall schematic configuration showing a frequency command of a conventional inverter device.

FIG. 13 shows a frequency of a conventional inverter device-
It is a time characteristic chart.

FIG. 14 is an overall block diagram showing group control of frequency commands of another conventional inverter device.

FIG. 15 is a block diagram showing an overall schematic configuration of another conventional inverter device.

FIG. 16 is an input voltage-time period characteristic diagram and a frequency-time period characteristic diagram during an instantaneous power failure.

[Explanation of symbols]

2 induction motors, 3 (3a, 3b, 3c, 3d, 3A,
3B, 3C) Inverter device for group control, 4 parameter unit, 5 arithmetic unit, 6 communication control processing unit,
7 communication output signal, 8 communication input signal, 9 input signal correction unit, 10 storage unit, 310 common converter.

Claims (7)

[Claims] 1. A converter unit for converting alternating current into direct current,
An inverter unit that converts the direct current obtained by the converter unit into an alternating current of a predetermined frequency, supplies the AC power output from the inverter unit to an induction motor, and independently controls a plurality of induction motors. In the group control inverter device, the group control inverter device mutually communicates one or more data of parameter data, operation command data, frequency command data, and monitor data. 2. In the mutual communication of the data, a plurality of the groups are controlled so that the communication outputs are input to the plurality of group control inverter devices and the communication outputs from the plurality of group control inverter devices are input. The group control inverter device according to claim 1, wherein a control inverter device is connected. 3. The group control inverter device according to claim 1, wherein in the mutual communication of the data, an arbitrary correction is added to the communication input and the data is output. 4. The intercommunication of the data, wherein a command from one group control inverter device is sequentially transmitted to another group control inverter device. The group control inverter device described in 1. 5. The conversion from direct current to alternating current of a predetermined frequency in the inverter unit is characterized by arbitrarily setting a time period from the current frequency of the alternating current power to the next desired reaching frequency. The group control inverter device according to any one of claims 1 to 4. 6. The conversion from direct current to alternating current having a predetermined frequency in the inverter section is to decelerate and accelerate the time period from the current frequency of the alternating current power to the next desired reaching frequency at the same time period. The group control inverter device according to any one of claims 1 to 5. 7. A converter unit for converting the alternating current into the direct current is separated to form a separate common converter, and a plurality of inverter devices are decelerated and accelerated at the same time during a continuous interruption of alternating current power supply. The group control inverter device according to any one of claims 1 to 6.