Inductance Measuring Device for DC Reactor of Medium Voltage Frequency Converter
A technology for measuring DC reactors and inductances, applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as easy failure, expensive special measuring instruments, and no coil inductance measuring function, etc. The effect of improving accuracy and reducing downtime
Active Publication Date: 2021-06-18
YUNNAN DAHONGSHAN PIPELINE
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Because the reactor plays a very important role in the use of the frequency converter, it is also one of the parts that are more prone to failure, and the commonly used measuring instruments do not have the accurate coil inductance measurement function, and the special measuring instruments are relatively expensive and not suitable for general electrical work. Instruments are necessary for the post, which brings us a new problem of how to quickly and accurately judge the degree of reactor insulation breakdown in terms of reactor fault handling
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] Such as Figures 1 to 5 The medium-voltage frequency converter DC reactor inductance measurement device includes a current detection module, an external interface module, a single-chip microcomputer module and a power supply module, and the current detection module, the external interface module and the power supply module are connected to the single-chip microcomputer module. The invention passes a power frequency 220 volts to the reactor under test, measures the current passing through the coil, and uses Ohm's law to calculate the impedance value of the coil (coil resistance + coil reactance), thereby calculating the inductance value to judge the insulation breakdown of the coil The device is equipped with an overcurrent protection device, which can effectively cut off the large current passing through the coil in the case of serious coil insulation breakdown, thereby preventing further damage to the coil under test and ensuring the safety of the measuring personnel. ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an inductance measuring device for a DC reactor of a medium-voltage frequency converter, which includes a current detection module, an external interface module, a single-chip microcomputer module and a power supply module, and the current detection module, the external interface module and the power supply module are connected to the single-chip microcomputer module; It is safe and reliable to use this device to detect, avoid direct access to 220V voltage, and use an ammeter to measure possible safety hazards in large currents; improve the accuracy of reactor insulation fault judgment, reduce manual judgment, dismantling and inspection time, and reduce downtime.
Description
technical field [0001] The invention relates to the technical field of inductance measuring devices, in particular to an inductance measuring device for a DC reactor of a medium-voltage frequency converter. Background technique [0002] Because the reactor plays a very important role in the use of the frequency converter, it is also one of the parts that are more prone to failure, and the commonly used measuring instruments do not have the accurate coil inductance measurement function, and the special measuring instruments are relatively expensive and not suitable for general electrical work. Instruments are necessary for the post, which brings us a new problem of how to quickly and accurately judge the degree of reactor insulation breakdown in reactor fault handling. Contents of the invention [0003] The purpose of the present invention is to provide an inductance measuring device for a DC reactor of a medium-voltage frequency converter, which can quickly and accurately ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R27/26
Inventor 潘春雷杨建平赵增佳韩军刚马波李妍
Owner YUNNAN DAHONGSHAN PIPELINE