Unlock instant, AI-driven research and patent intelligence for your innovation.

On-line analytic sine-wave AC electric source frequency changing method

An AC power supply, sine wave technology, applied in the conversion equipment and electrical components of AC power input to AC power output, intermediate conversion to DC conversion, etc., can solve the large gap between the output value and the set value, increase the frequency conversion The problem of the size of the device, the large size, etc.

Inactive Publication Date: 2007-11-07
沈进
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used frequency conversion speed controller has short service life, large volume, high cost, and large switching loss of the inverter module.
The existing frequency conversion speed regulation technology, after setting the motor speed and torque values ​​according to the needs, performs one-time sampling, one-time comparison operation and vector control on the actual feedback value of the motor, so that the output value and the set value It is difficult to meet the design requirements and use requirements, the energy consumption is large and the efficiency is low, and because the modulation technology of the output power waveform cannot be broken through, the modulation effect is also poor, the waveform distortion is large, and the anti-interference ability is not good. Strong, and can not reduce the temperature rise of the frequency converter, so it is difficult to guarantee the service life of the frequency converter, due to the addition of cooling devices, the volume of the frequency converter is increased, the power is reduced, and the conduction interference is difficult to control

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
  • On-line analytic sine-wave AC electric source frequency changing method
  • On-line analytic sine-wave AC electric source frequency changing method
  • On-line analytic sine-wave AC electric source frequency changing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The present invention is further explained as follows with reference to accompanying drawing in conjunction with specific embodiment:

[0009] An online analytical sine wave AC power frequency conversion method, which is a frequency conversion method to control the power on and off time through the function calculation results. Solve the sine wave function in the range of 0 to π, obtain the on-off time data, and save it, use the calculated data to control the power electronic device, and generate a series of unequal width pulses with the same frequency as the triangular wave Voltage, filtered to obtain an output sine wave voltage with the same frequency as the given sine wave function.

[0010] The present invention is realized by a set of voltage conversion control device, referring to accompanying drawing 2, the device is composed of a voltage sampling and rectification and voltage stabilization circuit 1, a single-chip microcomputer control circuit 2, an electronic s...

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

No PUM Login to View More

Abstract

A frequency-converting method of sine wave AC power supply in on-line analysis type includes carrying out calculation on triangular wave function with fixed frequency and sine wave function with set frequency in range of from O to pi when sine wave AC power supply is frequency-converted in order to obtain on-off time data being stored, controlling electric-electronic devices by obtained data for generating a series of pulse voltage as the same with triangular frequency in different width and obtaining output sine wave voltage in frequency as the same with set sine wave function after filtering.

Description

Technical field: [0001] The invention relates to a sine wave AC power frequency conversion method, in particular to an online analytical sine wave AC power frequency conversion method. Background technique: [0002] Since its appearance in the late 1970s, the frequency conversion speed controller has undergone nearly 30 years of development and evolution, and has experienced four innovations. At present, it has been widely used in various fields of production and life. Device technology has also been extensively reported. However, the commonly used frequency conversion speed regulator has short service life, large volume, high cost, and large switching loss of the inverter module. The existing frequency conversion speed regulation technology, after setting the motor speed and torque values ​​according to the needs, performs one-time sampling, one-time comparison operation and vector control on the actual feedback value of the motor, so that the output value and the set valu...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/44H02M5/458
Inventor 沈进
Owner 沈进