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Motor control apparatus

A control device and motor technology, applied in the direction of motor generator testing, multiple motor speed adjustment, measurement devices, etc., to achieve the effect of accurate measurement

Active Publication Date: 2017-07-18
SANYO DENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the insulation resistance value of the motor of the measurement object may be higher than the original part where the current flows through the motor other than the measurement object

Method used

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  • Motor control apparatus

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Embodiment Construction

[0022] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawings.

[0023]

[0024] figure 1 It is a circuit diagram of the motor control device 100 of this embodiment. The motor control device 100 drives and controls a plurality of motors (in figure 1 In is the arrangement of the first electric motor 410 and the second electric motor 420). The motor control device 100 includes a rectifier circuit 110 , a smoothing capacitor (smoothing circuit) 120 , an insulation resistance value detection unit 130 , a first inverter 140 , and a second inverter 150 .

[0025] Motor control device 100 is connected to three-phase AC power supply 200 vi...

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Abstract

The invention provides a motor control apparatus which ensures an accurate measurement of the insulation resistance value of the measurement-target motor without being influenced by the decrease of the insulation resistance of the non-measurement-target motor, even when measuring the insulation resistance value of a specific motor among the plurality of motors. The motor control apparatus according to one aspect of the present invention outputs a voltage command to the inverter such that a voltage with an electric potential identical to an electric potential of an earth is applied to the motor where the insulation resistance value is not detected (the non-measurement-target motor).

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. Furthermore, there is also cutting fluid that enters the inside of the motor and degrades the insulation of the motor. When the insulation deterioration of the motor gradually increases, the motor will eventually be grounded. After the motor is grounded, the leakage switch trips or the motor control device is damaged, resulting in system failure. System failures have had a huge impact on the factory's production line. Therefore, in consideration of preventive maintenance, a device capable of detecting the insulation resistance value of the motor is preferable. [0003] Japanese Patent Laid-Open Publication N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/46G01R27/02G01R31/34
CPCH02P5/46G01R27/025G01R31/343
Inventor 井出勇治平出敏雄
Owner SANYO DENKI CO LTD