Power supply management device and machine tool having the power-supply management device

Patent metadata

Field	Value
Publication number	US-9645599-B2
Application number	US-201113877031-A
Country	US
Kind code	B2
Filing date	Sep 30, 2011
Priority date	Oct 1, 2010
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

The present invention provides a power-supply management device which can efficiently connect and disconnect power supply to an electric-powered section, and a machine tool including the power-supply management device. The power-supply management device ( 101 ) detects a synchronization command of a control program, and compares an operation time of the electric-powered section between synchronizations in each control system which is a synchronization target by the synchronization command on the basis of the detected synchronization command. Then, the power-supply management device ( 101 ) disconnects the power supply to the electric-powered section belonging to the control system except the control system having the maximum operation time of the electric-powered section between the synchronizations, and restarts the power supply at the end of the synchronization in each control system.

First claim

The invention claimed is:

1. A power-supply management device, comprising:
a power-supply-connecting/disconnecting section configured to connect/disconnect power supply to a plurality of electric-powered sections provided in a machine tool, the electric-powered sections operating in processing of a material held in the machine tool;
and
a comparator configured to compare a powered-on state of each electric-powered section during the processing of the material, and detect an electric-powered section which does not need to be powered-on, wherein the power-supply-connecting/disconnecting section is configured to disconnect the power supply to the electric-powered section which does not need to be powered-on during the processing of the machine tool based on information from the comparator,
the comparator is configured to compare the powered-on state between synchronizations of each of the electric-powered sections in response to a detection of a synchronization command of a control program, and detect the electric-powered section which does not need to be powered-on when each of the electric-powered sections is powered-on before and after the synchronization,
the comparator is configured to compare an amount of time each of the electric-powered sections has been powered-on between the synchronizations, and determine an electric-powered section, except an electric-powered section having a maximum powered-on time between the synchronizations, as an electric-powered section which does not need to be powered-on, and

the power-supply-connecting/disconnecting section is configured to disconnect the power supply to the electric-powered section which does not need to be powered on after the end of an operation between the synchronizations.

2. The power-supply management device according to claim 1 , wherein
the power-supply-connecting/disconnecting section is configured to disconnect the power supply to each of the electric-powered sections during interruption or preparation of the processing of the material, and connect the power supply to each of the electric-powered sections at the start of the processing or restart of the processing.

3. The power-supply management device according to claim 1 , wherein
the power-supply-connecting/disconnecting section is configured to connect the power supply to a power-supply-disconnected electric-powered section when the electric-powered section is no longer powered-on during the operation.

4. The power-supply management device according to claim 1 , wherein
the comparator is configured to compare the amount of time each of the electric-powered sections has been powered-on between the synchronizations, and determine the electric-powered sections that were not powered-on between the synchronizations as an electric-powered section which does not need to be powered-on.

5. The power-supply management device according to claim 1 , wherein
when a program controlling each of the electric-powered sections has a plurality of synchronization commands for synchronizing each of the electric-powered sections, the comparator is configured to detect a plurality of synchronization commands, and detect or calculate the powered-on time of each of the electric-powered sections between the synchronization commands, and set the powered-on time as the powered-on time of each of the electric-powered sections between the synchronizations.

6. The power-supply management device according to claim 1 , wherein
the power-supply-connecting/disconnecting section is configured to connect the power supply to the power-supply-disconnected electric-powered section at the synchronization of each of the electric-powered sections.

7. The power-supply management device according to claim 1 , wherein each of the plurality of electric-powered sections includes a motor and a corresponding motor driver.

8. A machine tool, comprising:
a plurality of electric-powered sections operating in processing of a material; and
a power-supply management device configured to connect/disconnect power supply to the plurality of electric-powered sections, wherein
the power-supply management device uses the power-supply management device according to claim 1 .

Assignees

• Matsumaru Hajime
• Akimoto Satoru
• Matsumoto Hitoshi
• Shibui Yutaka
• Tsuyusaki Umeo
• Shinohara Hiroshi
• Yanagidaira Shigeo
• Citizen Watch Co Ltd
• Citizen Machinery Co Ltd

Inventors

• Matsumaru Hajime
• Akimoto Satoru
• Matsumoto Hitoshi
• Shibui Yutaka
• Tsuyusaki Umeo
• Shinohara Hiroshi
• Yanagidaira Shigeo

Classifications

• G05B2219/32021

  Energy management, balance and limit power to tools · CPC title

• G05B2219/34442

  Control unit serves also to match drive motor to power supply · CPC title

• G05F5/00 Primary

  Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output · CPC title

• G05B19/188 Primary

  characterised by special applications and not provided for in the relevant subclasses, (e.g. making dies, filament winding) · CPC title

• G06F1/26

  Power supply means, e.g. regulation thereof (for memories G11C) · CPC title