Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!
Mine flameproof and intrinsically safe variable frequency speed control device
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An intrinsically safe, variable frequency speed regulation technology, applied in the direction of emergency protection circuit devices, electrical components, control systems, etc., can solve the problem of heat dissipation, and the frequency converter can not meet the flammability and explosion problems, so as to achieve long service life and energy saving Remarkable effect, good speed adjustment effect
Inactive Publication Date: 2012-02-08
范鑫焱
View PDF4 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
But its disadvantage is that due to the use of high-power power semiconductors as rectifier and inverter components, its heat dissipation problem has always hindered the use of frequency conversion technology in flammable and explosive environments such as mines, and in mining such as belt conveyors, hoisting winches, fans, scrapers Transport aircrafts require full torque start, variable load operation, soft start and soft stop, and frequency conversion technology is required, but general-purpose frequency converters cannot meet the requirements of flammable and explosive environments.
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] The specific implementation will be described in detail below in conjunction with the accompanying drawings:
[0016] figure 1 It is a schematic diagram of the electrical principle of the embodiment of the present invention. figure 2 It is a schematic diagram of the secondary control loop of this embodiment. A mine explosion-proof and intrinsically safe frequency conversion speed regulating device, which includes a frequency converter BPQ composed of a three-phase rectifier, a filter capacitor, and an IGBT inverter, and also includes a control device, an explosion-proof box and a motor M. The control device includes: isolating switch DH, power frequency and secondary control loop, frequency conversion and control loop, of which:
[0017] The power frequency and secondary control loop is composed of a power frequency loop and a secondary control loop. The power frequency loop is sequentially connected to the three-phase by the transformer BK, the resistance-capacitanc...
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 relates to a mine flameproof and intrinsic safety type variable frequency speed control device, which comprises a frequency converter consisting of a three-phase rectifier, a filtering capacitor and an IGBT inverter, a control device, and a flameproof case body, wherein the control device comprises an isolating switch, a power frequency and secondary control loop, and a variable frequency and control loop. The variable frequency speed control device has a variable frequency operating mode and a power frequency operating mode, and gives priority to the variable frequency operating mode complemented with the power frequency operating mode, thus the variable frequency speed control device not only can regulate the speed and save energy better, but also has the advantages of dust control, moisture protection, flame protection, and the like; and the variable frequency speed control device adopts digital display, which not only has a function of remote and approach controls, but also has functions of displaying electric energy, namely displaying load electric energy clearly, and temperature control, and has protection functions of surge protection, open phase protection, over voltage protection, under-voltage protection, and the like. The variable frequency speed control device can be applied to underground places with coal dust or gas coal dust explosion in coal mines to perform controls of starting, stopping and variable frequency speed control on a three-phase flameproof motor, and performs various protections on the motor. The variable frequency speed control device adopts a variable frequency speed control method which is advanced and can be widely popularized.
Description
Technical field: [0001] The invention relates to a motor frequency conversion control technology, more specifically to a mining explosion-proof and intrinsically safe frequency conversion speed regulating device. Background technique: [0002] In the prior art, motor frequency conversion control technology is rapidly and widely used in industrial production fields, such as machinery, household appliances, metallurgy, light textile and other industries. It can regulate speed very well and has obvious energy-saving functions. But its disadvantage is that due to the use of high-power power semiconductors as rectifier and inverter components, its heat dissipation problem has always hindered the use of frequency conversion technology in flammable and explosive environments such as mines, and in mining such as belt conveyors, hoisting winches, fans, scrapers Transport aircraft and others require full torque starting, variable load operation, and soft start and soft stop, all of wh...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.