JPH04138092A - Motor operation controller - Google Patents

Abstract

PURPOSE:To improve speed characteristics at the time of follow-up starting of a helper motor, which may cause crumpling or breaking of paper, by providing a standby motor, which does not operate but monitors the speed of the helper motor, and accelerating a motor from a currently monitored speed to a set speed constantly, without decelerating the motor temporarily, upon provision of an 'operation' command at the time of standby. CONSTITUTION:An auxiliary motor controller 6 comprises a control circuit 10 provided with three modes of 'operation' 11, 'standby' 12 and 'stop' 13. Under the 'standby' 12 mode, the auxiliary motor controller 6 controls not to produce an output from a main motor circuit but to keep a speed detecting circuit 8 in ready state, and a speed detector 3 associated with an auxiliary motor 2M monitors the rotational speed 23 of the auxiliary motor 2M. When a main controller 15 provides an operational command 17 to the auxiliary motor controller 6 under that state, speed reference generating circuit 9 in the auxiliary motor controller does not rise the speed reference from zero but rises a current rotational speed 23 to a speed command value 24 along a curve 26 thus accelerating the auxiliary motor 2M smoothly without decelerating the motor temporarily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a motor operation control device for a sectional paper machine, a film manufacturing machine, etc.

(Prior art) In conventional sectional paper machines, when the roll driven by an auxiliary electric motor (hereinafter referred to as helper motor) rotates during paper feeding, the paper may wrap around the roll or the paper may not flow in the correct direction. After completing the paper passing process, as I may not be able to go to
There is a helper motor that you want to start after. After the main motor (hereinafter referred to as the master motor) is operated, the paper threading operation is performed, and when the paper threading operation is completed, the helper roll is rotated by the frictional force of the paper. , is rotating at a certain rotational speed.

When a driving command is given to the helper motor in this state, the speed standard generation circuit of the helper motor control device starts up the speed standard from zero after the driving command, so the speed of the helper motor decreases and is rotated by frictional force. It will slow down one step from its current speed and then accelerate again.

(Problem to be Solved by the Invention) When the above-mentioned helper motor is started after the helper motor is started, it will be accelerated again after being decelerated, which may cause "paper wrinkles" or "paper breakage" if the paper strength is weak. This causes serious problems such as product quality and operational time loss.

The present invention provides an electric motor operation control device that improves the speed characteristics of the helper motor when it is started after the helper motor, which causes "paper wrinkles" and "paper breaks," and can smoothly accelerate without slowing down. be.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a main motor that drives a main roll, an auxiliary motor that drives an auxiliary roll, and a speed detector that detects the rotational speed of the auxiliary motor. , a speed reference generation circuit that inputs the speed signal of this speed detector and adjusts the speed reference signal, a speed setting circuit that outputs a speed setting value to this speed reference generation circuit, and an operation command that gives operation commands to auxiliary machinery. circuit, an operation control circuit that outputs run, hold, or stop according to the output signal of this operation command circuit, and a main circuit that supplies power to the trap conductor according to the signals of this operation control circuit and speed reference generation circuit. This is an electric motor operation control device comprising:

(Function) In a continuous processing line driven by multiple motors such as a sectional paper machine, in a helper motor control device that starts after the master motor is operated, the standby motor does not operate but monitors the speed of the helper motor. It has a mode, and when a "run" command is received during standby, it accelerates from the currently monitored speed to the set speed without slowing down.

(Example) Next, an example of the present invention will be described. Figure 1 shows main roll 1
A main motor IM that drives the auxiliary motor IM, an auxiliary motor 2M that drives the auxiliary roll 2, a speed detector 3 that detects the rotational speed of the auxiliary motor 2M, and a speed signal of the speed detector 3 is inputted to generate a speed reference signal. The speed reference generation circuit 9 to be adjusted, the speed setting circuit I6 which outputs a speed setting value to the speed reference generation circuit 9, the operation command circuit 17 which gives a driving command to the auxiliary machine 2M, and the output signal of the driving command circuit 17 A motor operation control device comprising an operation control circuit IO that outputs run, hold or stop, and a main circuit 7 that supplies power to the auxiliary motor 2M based on signals from the operation control circuit IO and the speed reference generation circuit 9. It shows.

That is, 1 is a main roll, IM is a main motor (master motor) that drives it, and 2 is an auxiliary roll 2M is an auxiliary motor (pelver motor) that drives it.

The auxiliary machine control device 6 is configured to be able to monitor the speed of the auxiliary machine with the speed detector 3 via the speed detection circuit 8. It is possible to generate a speed reference as a control device 6.

In addition, the auxiliary machine control device 6 has three modes [
"Operation JIL,""Standby" 12, "Stop" 13], which is the operation command 1 from the master control device 15.
It is switched by 7.

In the "standby" 12 mode, the auxiliary machine control device if6 does not output the motor main circuit, but keeps the speed detection circuit 8 alive and uses the speed detector 3 attached to the auxiliary machine 2M to perform auxiliary motor control. The rotational speed 23 of the machine 2M is monitored.

In this state, the auxiliary machine control device 6 is controlled by the master control device 15.
When the operation command 17 is issued, the speed reference generation circuit 9 of the auxiliary machine control device does not start the speed reference from zero, but starts the compensation from the currently rotating speed 23 to the speed command value 24. Machine 2M can accelerate smoothly without slowing down.

In other words, when the auxiliary motor 2M is started after the traction motor 1M has been operated, if a "standby" command is given to the auxiliary motor 2M at the same time as the traction motor LM is started, the auxiliary motor 2M can be started. When a "run" command is given when starting the machine 2M, the auxiliary machine control device 6 uses the speed reference generation circuit 9 to
It is possible to accelerate from the currently rotating speed 23 to the speed setting value 24 without any acceleration or deceleration due to the speed characteristic as shown by the curve 26.

[Effects of the Invention] Since the auxiliary engine can accelerate without decelerating at all during a follow-up start, the causes of "paper wrinkles" and "paper breaks" are reduced.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an operation control device showing an embodiment of the present invention, and FIG. 2 is a diagram illustrating the characteristics of FIG. 1. 3...Speed detector 6...Auxiliary motor control device 7
...Main circuit 8...Speed detection circuit 9...
Speed reference generation circuit 10...Control circuit 15...Main control device 1
6...Set speed circuit 17...Driving command circuit Agent Patent attorney Norio Ogo Diagram

Claims (1)

[Claims] A main motor that drives the main roll, an auxiliary motor that drives the auxiliary roll, a speed detector that detects the rotational speed of the auxiliary motor, and a speed standard that inputs the speed signal of this speed detector and adjusts the speed reference signal. a generating circuit, a speed setting circuit that outputs a speed setting value to the speed reference generating circuit, a driving command circuit that gives a driving command to the auxiliary motor, and a driving, holding, or stopping signal outputted from the driving command circuit. An electric motor operation control device comprising: an operation control circuit; and a main circuit that supplies power to the auxiliary electric motor based on signals from the operation control circuit and the speed reference generation circuit.