JPH0518297U - Drive control device for rotating machine - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a driving device for a rotating machine, which does not generate vibration in the machine when the current control section is enabled from the invalid state. The drive device for the rotating machine 1 is characterized in that, when the current control section 5 is enabled, the command of the speed control section 4 is set to the rotation speed of the rotating machine 1. The device sets the command of the speed control unit 4 to the rotation speed of the rotating machine 1 when the current control unit 5 is enabled, so that the rotation of the rotating machine 1 with respect to the speed command is not generated in the machine. The number can be followed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drive control device for a rotary machine that drives a movable part of an industrial machine or a machine tool.

[0002]

[Prior Art]

 Conventionally, in drive control devices for rotary machines that drive movable parts of industrial machines and machine tools, each control variable starts from zero when the current control part is enabled.

FIG. 4 is a block diagram schematically showing an example of a conventional drive control device for a rotary machine. In the figure, 1 is a rotating machine that drives a movable part of an industrial machine or a machine tool, 2 is a speed detecting means that detects the rotating speed of the rotating machine, and feeds back the detected speed as an actual rotating speed b of the rotating machine. 3 is an acceleration / deceleration control unit that adds acceleration time and deceleration time to a speed command a for rotating the rotating machine at a target speed. 4 is based on the output of the acceleration / deceleration control unit 3 and the actual rotation speed fed back. Speed controller for controlling the speed of the rotating machine 1 by means of 5 is a current controller for controlling the current to the rotating machine 1 based on a command from the speed controller 4, and 6 is each control variable when the current controller 5 is disabled. Is a variable control unit that makes zero.

Next, the operation of the conventional apparatus having the above configuration will be described based on the flowchart of FIG. First, the speed command a is input to the acceleration / deceleration control unit 3 (step 01), and if the current control unit 5 is invalid, the speed command a is set to zero (step 02).

An acceleration time and a deceleration time are added to the speed command by the acceleration / deceleration control unit 3 (step 05). The output of the acceleration / deceleration control unit 3 is set to zero when the current control unit 5 is invalid (step 06).

Next, a speed feedback a is created by the speed detecting means 2 (step 03), and a deviation between this speed feedback and the output of the acceleration / deceleration control unit 3 is calculated to create a speed deviation c (step 07). Speed control processing is performed by setting the input of the speed control unit 4 as a speed deviation (step 08). If the current control unit 5 is invalid, the output of the speed control unit 4 is set to zero (step 09).

Current control processing is performed by using the input of the current control section 5 as the output of the speed control section 4 (step 10). If the current control unit 5 is invalid, the output of the current control unit 5 is set to zero (step 11). The output of the current controller 5 drives the rotating machine 1 (step 12). FIG. 6 shows a conventional characteristic diagram.

[0008]

[Problems to be solved by the device]

 Since the conventional driving device for the rotating machine 1 is configured as described above, when the rotating machine 1 is rotating and the current control unit 5 is enabled from the time when the rotating machine 1 is disabled, the speed command a is given as shown in FIG. Since the output of the acceleration / deceleration control unit 3 starts from zero even if it is the same as the number of revolutions of 1, there is a problem that vibration is given to the machine when the current control unit 5 is enabled from the invalid state while the rotating machine 1 is rotating. there were.

The present invention has been made to solve the above problems, and provides a driving device for a rotating machine that does not generate vibration in the machine when the current control unit is enabled from the time when the current control unit is disabled. With the goal.

[0010]

[Means for Solving the Problems]

 A drive device for a rotating machine according to the present invention is characterized in that, when the current control section is enabled, the command of the speed control section is set to the rotation speed of the rotating machine.

[0011]

[Action]

 The drive device for a rotating machine according to the present invention, when the current control section is enabled, sets the command of the speed control section to the number of rotations of the rotating machine so that the machine can rotate with respect to the speed command without generating vibration. The rotation speed of the machine can be tracked.

[0012]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an implementation order of the present invention. In the figure, 1 is a rotary machine that drives a movable part of an industrial machine or a machine tool, and 2 is a rotational speed of a rotary machine 1. The speed detecting means 3 which feeds back the actual rotation speed b of the rotating machine 1 is an acceleration / deceleration control unit for adding an acceleration time and a deceleration time to a speed command a for rotating the rotating machine 1 at a target speed. Is a speed control unit that controls the speed of the rotating machine 1 based on the output of the acceleration / deceleration control unit 3 and the actual rotation speed fed back, and 5 controls the current to the rotating machine 1 based on a command from the speed control unit 4. The current control unit 6 is a variable control unit that sets each control variable to zero when the current control unit 5 is disabled. 7 is a speed tuning unit for setting variables of the acceleration / deceleration control unit 3 so that the output of the acceleration / deceleration control unit 3 becomes the same as the rotation speed of the rotating machine 1 when the current control unit 5 is enabled from the invalid state. is there.

Next, the operation of this embodiment will be described based on the flowchart of FIG. First, the speed command a is input to the acceleration / deceleration control unit 3 (step 01), and if the current control unit 5 is invalid, the speed command a is set to zero (step 02).

Next, the speed detection means 2 creates the speed feedback a (step 03). When the current controller 5 changes from invalid to valid, the speed synchronization processing 7 causes the output of the acceleration / deceleration processing to be the same as the speed feedback. The initial value of the control variable is set so that (step 04).

An acceleration time and a deceleration time are added to the speed command by the acceleration / deceleration control unit 3 (step 05). The output of the acceleration / deceleration control unit 3 is set to zero when the current control unit is invalid (step 06).

A deviation between the speed feedback and the output of the acceleration / deceleration control unit 3 is calculated to create a speed deviation c (step 07). Speed control processing is performed by setting the input of the speed control unit 4 as a speed deviation (step 08). If the current controller 5 is invalid, the output of the speed controller 4 is set to zero (step 09).

The input of the current control unit 5 is used as the output of the speed control unit 4, and the current control process is performed (step 10). If the current control unit 5 is invalid, the output of the current control unit 5 is set to zero (step 11). The output of the current controller 5 drives the rotating machine 1 (step 12).

[0018]

[Effect of the device]

 As described above, according to the present invention, when the current control unit changes from ineffective to effective, the command to the speed control unit is made to be the same as the rotation speed of the rotating machine to generate vibration in the machine. This has the effect of allowing the rotation speed of the rotating machine to follow the speed command.

[Brief description of drawings]

FIG. 1 is a diagram showing a drive control device for a rotating machine according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a flow according to an embodiment of the present invention.

FIG. 3 is a characteristic diagram according to an embodiment of the present invention.

FIG. 4 is a diagram showing a conventional drive control device for a rotating machine.

FIG. 5 is a flowchart showing a flow of a conventional device.

FIG. 6 is a characteristic diagram of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary machine 2 speed detection means 3 acceleration / deceleration control section 4 speed control section 5 current control section 6 variable control section 7 speed tuning section

Claims (1)

[Scope of utility model registration request] 1. A drive control device for controlling a rotating machine by a speed control unit and a current control unit provided at the output of the speed control unit, wherein when the current control unit is enabled, a command of the speed control unit is A drive control device for a rotating machine, wherein the rotational speed of the rotating machine is set.