Frequency conversion power frequency online switching device
A technology of switching devices and pins, which is applied in the direction of electrical components, control systems, AC motor control, etc., to achieve the effects of avoiding inrush current, prolonging service life and improving efficiency
Active Publication Date: 2016-04-13
山东金洲科瑞节能科技有限公司
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to solve the above-mentioned defects in the prior art, the present invention provides a frequency conversion industrial frequency online switching device, which solves the problem of inrush current generated during the switching process, and can realize the display and control of the frequency conversion state of the frequency converter
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 Construction
[0018] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0019] Such as figure 1 The shown frequency conversion power frequency on-line switching device includes a power supply module, a processing module, an EEPROM, an output module, a signal acquisition module, a switch signal input circuit, and a display module. The processing module includes a central processing unit and a communication module. The central processing unit adopts 32-bit ARM chip STM32F103, and the communication module includes two-way RS485 communication circuits, and the two-way RS485 communication circuits are electrically connected to the central processing unit respectively; the signal acquisition module includes 4-way signal Acquisition circui...
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 an on-line switching device of frequency conversion and power frequency. The on-line switching device comprises a power supply module, a processing module, an EEPROM (Electrically Erasable Programmable Read-Only Memory), an output module, a signal acquisition module, a switching signal input circuit and a display module, wherein the processing module comprises a CPU (Central Processing Unit) and two RS485 (Recommended Standard 485) communication circuits which are respectively electrically connected with the CPU; the signal acquisition module comprises four signal acquisition circuits which are all connected with the CPU; the switching signal input circuit and the EEPROM are respectively electrically connected with the CPU; the output module comprises two relay output modules which are connected with the CPU; the display module comprises a display circuit and a display screen; the power supply module is provided with three 5V electricity supplies for the complete device. According to the invention, by virtue of real-time collection of frequency conversion signals and control based on the CPU and PLC (Programmable Logic Controller), low-voltage start and soft switching of the frequency conversion state of a transducer are realized.
Description
technical field [0001] The invention relates to a switcher, in particular to a variable frequency power frequency on-line switching device. Background technique [0002] When the motor is converted from the frequency conversion state to the power frequency state, most of them adopt direct switching. Since the phase of the output waveform of the frequency converter in the frequency conversion state is different from that of the power frequency AC, it will cause a large instantaneous impact current, which will affect the power supply grid, Power supply equipment and motors have a great impact. Although there are switching controllers on the market, these switching controllers can only realize state switching, and cannot specifically track and control a certain inverter. Contents of the invention [0003] In order to solve the above-mentioned defects in the prior art, the present invention provides a frequency conversion power frequency on-line switching device, which solves ...
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): H02P27/00H02P27/04
Inventor 李钢
Owner 山东金洲科瑞节能科技有限公司