JPH06261596A - Inverter device for spinning-machine driving - Google Patents

Abstract

PURPOSE:To construct a versatile network system between many inverter devices by a method wherein an inverter device itself for spinning-machine driving is provided with a serial communication function. CONSTITUTION:In a microcomputer 12 installed in a control circuit 2 for an inverter device 1 which controls the speed of a main-shaft-driving induction motor for a spinning machine, protocols, at various stages, which are used to transfer various instruction signals and various status signals regarding the operation of the motor between the inverter device 1 and an external network system are constructed by software together with the operation program of a make-and-break instruction signal to a main-circuit switching element in the inverter device 1, and an interface circuit 13 is installed in the control circuit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device for controlling the speed of an induction motor for driving a spindle of a spinning machine.

[0002]

2. Description of the Related Art As a conventional inverter device of this type, according to a speed command signal and an operation command signal created by a separately installed control device, or according to a speed setting signal previously input to the inverter device itself, The one that controls the speed of the induction motor for the spinning machine and starts and stops it,
Alternatively, for a plurality of spinning machines, those having a serial communication function and performing a linked operation between each inverter device and an external network system through a dedicated interface control device separately provided for each inverter device, etc. It has been known.

Incidentally, FIG. 2 is an example of a block circuit diagram of a conventional inverter device which operates in cooperation with an external network system. In FIG. 2, 4 is an inverter device,
Three-phase AC rectification unit, smoothing capacitor, and inverter unit using switching transistors as switching elements and control circuit 10
And the speed is controlled by using the induction motor 3 for driving the spindle of the spinning machine as a load.

Regarding the control circuit 10, reference numeral 17 denotes an I / O control section for soft-processing the operation command signal from the I / O circuit 16, a speed command signal from the speed setting circuit 15 and the I / O control signal.
A speed setting unit for soft-processing the command signal of the / O control unit,
A microcomputer (microcomputer) having a PWM calculation unit that soft-processes a command signal from the speed setting unit and calculates and outputs a PWM signal for each switching element of the inverter unit, and 11 is a command signal from the PWM calculation unit. The reference numeral 14 designates a base drive circuit for distributing the received and amplified PWM signal to the respective switching elements, and 14 a control power source.

Further, the speed command circuit 20 and the operation command circuit 21 which constitute the external control device are the interface circuit 2
2 and 24, serial transmission control circuit 23, and power supply circuit 25
It is linked to an external network system via an interface control device composed of.

[0006]

Generally, in a spinning factory, an extremely large number of spinning machines are operated. On the other hand, when changing the type of yarn to be spun, an induction motor for driving the spinning machine is used. Need to change the speed setting value. However, in the conventional inverter device as described above, it is necessary to manually change the speed setting value of the induction motor, so that the setting value changing work for a large number of spinning machines is extremely complicated. Was there. Furthermore, when the spinning machine is stopped due to a trip of the inverter device or the like for some reason, it is necessary to find a stopped spinning machine in a large number of spinning machines and normally perform recovery by re-changing the speed setting value of the driving induction motor. In short, these restoration works are also extremely complicated.

Corresponding to the above, if the above-mentioned inverter devices and the external network system are linked to perform the speed setting change processing or the operation status signal return processing, the above-mentioned spinning machines for a large number of spinning machines are targeted. Although it is possible to simplify the work required for various processes, each inverter device requires a dedicated interface control device with the external network system, which makes the spinning machine operation system as a whole expensive. Didn't get

In view of the above, the present invention is directed to the construction of a network system capable of collectively processing the operation state of each spinning machine driving induction motor and the speed setting value changing processing for a large number of spinning machines. It is an object of the present invention to provide an inverter device for driving a spinning machine, which can be realized while reducing the cost.

[0009]

In order to achieve the above object, a spinning machine drive inverter device according to the present invention is provided with various command signals such as a speed command and various operating state signals related to the operation of an induction motor for driving a spindle of a spinning machine. And a microcomputer in which a protocol of various steps for performing transmission / reception with the inverter device and an external network system by serial communication, and a calculation program of an opening / closing command signal for a main circuit switching element of the inverter device are constructed by software. An interface circuit between input / output signals relating to the exchange of the various signals and a control circuit thereof are incorporated.

[0010]

In the related art, when a plurality of inverter devices as described above are linked to and controlled by an external network system through serial transmission of required signals, each inverter device is provided with a dedicated interface controller as described above. It was According to the present invention, a function of the interface control device, that is, a serial communication function between the inverter device and an external network system, and an operation program of an opening / closing command for a main circuit switching element of the inverter device are both constructed in a micro computer, and This micro computer is built in the control circuit of the inverter device, and the required serial communication functions are integrated in the inverter device to simplify the configuration of the network system for a plurality of spinning machines.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to a block circuit diagram of an inverter device illustrated in FIG. Figure 1
In FIG. 2, constituent elements having the same functions as those in the embodiment of the prior art shown in FIG.
FIG. 1 shows the speed command circuit 20 and the operation command circuit 2 shown in FIG.
An external control device composed of 1 and an interface circuit 2
2 and 24, serial transmission control circuit 23, and power supply circuit 25
And an interface control device, and a control circuit 10
With respect to the speed setting circuit 15 and the I / O circuit 16 in FIG. 1, and the I / O control and speed setting software processing units in the microcomputer 17, the interface circuit 13 and the microcomputer ( Microcomputer) 12 and the software processing unit of the serial communication function are integrated into the inverter device 1
2 shows a circuit configuration incorporated in the control circuit 2 in FIG.

Here, in the software processing section of the serial communication function of the microcomputer 12, a protocol of each required step for serial transmission of various signals through the interface circuit 13 between the inverter device and the external network system is constructed by software. ing.

[0013]

According to the present invention, an inverter device for controlling the speed of an induction motor for driving a spindle of a spinning machine is provided, and various command signals such as a speed command related to the operation of the motor and various status signals such as an operation stop state are exchanged. A multi-stage protocol for performing serial communication between the inverter device and an external network system by a software and a program for calculating an opening / closing command signal for a main circuit switching element of the inverter device; By incorporating an interface circuit between input / output signals related to transmission / reception in the control circuit of the inverter device, it is possible to perform the grasp of the operating state of each spinning machine driving induction motor and the speed setting value change processing all at once. A network system that controls many induction motors It is possible to construct simply and inexpensively between the inverter device can be reduced overall automation, productivity improvement by laborsaving in mills having a large number of the spinning machine.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of an inverter device showing an embodiment of the present invention.

FIG. 2 is a block circuit diagram of an inverter device showing an embodiment of the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inverter device 2 (inverter) control circuit 3 Induction motor 4 Inverter device 10 (Inverter) control circuit 11 Base drive circuit 12 Microcomputer (microcomputer) 13 Interface circuit 14 Control power supply 15 Speed setting circuit 16 I / O circuit 17 Microcomputer (microcomputer) Computer) 20 Speed command circuit 21 Operation command circuit 22 Interface circuit 23 Serial transmission control circuit 24 Interface circuit 25 Power supply circuit

Claims (1)

[Claims] 1. An inverter device for speed-controlling an induction motor for driving a spindle of a spinning machine, wherein the inverter device sends and receives various command signals such as a speed command related to the operation of the electric motor and various status signals such as an operation stop state. And a network in which an external network system is serially communicated, and a microcomputer in which an operation program of an opening / closing command signal for the main circuit switching element of the inverter device is constructed by software, and an input / output for transmitting / receiving the various signals An inverter device for driving a spinning machine, comprising an interface circuit between signals and its control circuit.