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Motor control device and insulation resistance detection method thereof

A technology of motor control and insulation resistance, applied in the direction of motor control, motor generator testing, measuring devices, etc., can solve problems such as difficult to calculate equivalent resistance correctly

Pending Publication Date: 2021-04-20
SANYO DENKI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is difficult to accurately calculate the equivalent resistance corresponding to the leakage current of the semiconductor switching element

Method used

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  • Motor control device and insulation resistance detection method thereof
  • Motor control device and insulation resistance detection method thereof

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Embodiment Construction

[0021]In the following detailed description, many specific details are proposed in order to provide a thorough understanding of the disclosed embodiments. However, it is clear that one or more embodiments can be implemented without these specific details. In other cases, well-known structures and apparatus are schematically illustrated in order to simplify the drawings.

[0022]figure 1 Representation of the present invention.

[0023]Further, in the following description, the current may include a current value, the voltage can include a voltage value, and the impedance may include an impedance value, in addition, the resistance can include a resistance value. These terms are explained by technical knowledge of those skilled in the art.

[0024]Motor control device COnt1 Including: rectifier circuit (DC supply department) SDC , Including the bus bar ml on the positive side+And negative side bus ml-Busbar ML, smoothing capacitor (capacitor) C1, C2, Including semiconductor switching element T...

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Abstract

The invention provides a motor control device and an insulation resistance detection method thereof. The motor control device includes: a second switch capable of grounding the negative side bus bar; a third switch, one end of which is connected to a second power supply connected to the bus bar and the other end of which can be grounded; a current detection unit that detects a current value between the winding of the motor and the negative-side bus; and an insulation resistance calculation unit that calculates the insulation resistance value of the motor according to the current value detected by the current detection part, the voltage value of the capacitor and the voltage value of the second power supply part when the third switch is turned off and the third switch is turned on in a state in which the electric charge of the ground capacitor is discharged by turning on the second switch for a predetermined period of time while cutting off the electric power supply by the first switch unit.

Description

Technical field[0001]One way of the present invention relates to an insulating resistance detection method of a motor control device and a motor control device.Background technique[0002]The motor such as a servo motor is driven by a motor control device including an inverter, for machine tools, and the like. The cutting fluid is attached to the motor in a device for processing using a cutting liquid using a cutting liquid. There is sometimes a problem that the cutting fluid enters the inside of the motor to degrade the insulation of the motor.[0003]In addition, even when the motor is used for the machine tool, the motor may produce an insulating deterioration in the case of long-term use or when the environment is used.[0004]The insulation deterioration of the motor is gradually performed, and the final motor is grounded. If the motor is grounded, the leakage switch trip or the motor control device is damaged. As a result, the system failure is generated. The system failure has a si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R27/08G01R31/34H02P29/024
Inventor 井出勇治菊地敬吾平出敏雄
Owner SANYO DENKI CO LTD
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