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motor control device

A technology for control devices and motors, applied in the direction of AC motor control, control systems, measurement devices, etc., can solve the problem of low measurement accuracy

Active Publication Date: 2022-04-19
SANYO DENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when measuring the insulation resistance value at a very low voltage, there will be a problem of low measurement accuracy.

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0037]

[0038] figure 1 It is a circuit diagram of the motor control device according to Embodiment 1 of the present invention. The motor control device is to drive and control multiple motors (in figure 1 In the first motor 500a and the second motor 500b) device. In Embodiments 1 and 2 described below, the circuit for controlling the first motor 500a is referred to as the motor control device 100a, and the circuit for controlling the second motor 500b is referred to as the motor control device 100b. The same is true for each structural element, which is distinguished by adding ab to the reference numerals. The motor control device 100a and the motor control device 100b have the same circuit configuration. Therefore, when summarizing these descriptions, the addition ab of the reference numeral 100 may be omitted, and the term "motor control device 100" may be used. The same applies to the reference numerals of other circuit configurations, and ab is sometimes omitted. ...

Embodiment approach 2

[0077] figure 2 It is a circuit diagram of motor control device 100 (100a, 100b) according to Embodiment 2 of the present invention. The motor control device 100 of the second embodiment is different from the first embodiment in that the low-voltage side output terminal of the power supply 132 is connected to the switch 134 , and the high-voltage side output terminal of the power supply 132 is connected to the positive side bus bar of the inverter 120 .

[0078] That is, in Embodiment 2, the low voltage side output terminal of the power supply 132a is connected to the switch 134a, and the low voltage side output terminal of the power supply 132b is connected to the switch 134b. The high voltage side output terminal of the power supply 132a is connected to the positive side bus bar of the inverter 120a, and the high voltage side output terminal of the power supply 132b is connected to the positive side bus bar of the inverter 120b.

[0079] In Embodiment 2, the current detect...

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Abstract

The present invention provides a motor control device including: an insulation resistance value detection unit for detecting insulation resistance values ​​of a plurality of motors; When detecting the insulation resistance value of a specific motor among the plurality of motors, the insulation resistance value detection unit applies the output voltage of the power supply corresponding to the specific motor to the ground, and applies the output voltage of the other power supply In the case of the motor corresponding to the other power source, the insulation resistance value of the specific motor is detected.

Description

technical field [0001] The present invention relates to motor control devices. Background technique [0002] Servo motors are driven by a motor control unit including an inverter, and are used in machine tools, etc. Machine tools, such as machine tools, that use cutting fluid for processing have the following problems. First, the cutting fluid adheres to the motor. Moreover, some cutting fluid also enters the inside of the motor, deteriorating the insulation of the motor. As the insulation of the motor deteriorates gradually, the motor will eventually be grounded. If the motor is grounded, the leakage switch will trip or the motor control device will be damaged, causing system failure. A system failure can have a huge impact on a factory's production line. Therefore, in consideration of preventive maintenance, a device capable of detecting the insulation resistance value of the motor is required. [0003] The subject of Japanese Patent Laid-Open Publication No. 2015-12...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P5/74H02P27/08G01R27/02
CPCH02P5/74H02P27/08G01R27/025
Inventor 井出勇治平出敏雄菊地敬吾
Owner SANYO DENKI CO LTD