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Program-control frequency converting device

A frequency converter and program-controlled technology, applied in the field of frequency converters, can solve the problems of single work and unchangeable frequency converters, and achieve the effects of reasonable structure, small acceleration and deceleration jitter, and high-speed precise control.

Inactive Publication Date: 2009-01-14
李帮庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly provides a universal program-controlled frequency converter that can control the motor and its external mechanical system according to the user's own needs; it solves the problems in the prior art that the program of the frequency converter is fixed and cannot be changed, and the work is single technical issues

Method used

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Embodiment 1

[0016] Embodiment 1: As shown in Figure 1, the program-controlled frequency converter of the present invention includes an overvoltage protection circuit, a rectification and filtering circuit, a drive and power output circuit, an overcurrent and overload detection circuit, a signal processing circuit and an input that can be programmed and defined by the user , output port, etc. The signal processing circuit includes frequency conversion speed controller, user program memory, user program processor, timer, counter and angle controller, etc. After the AC power supply is connected to the overvoltage protection circuit, it is connected to the rectification and filtering circuit, and the DC power supply suitable for the load requirements is formed through rectification and filtering; the rectification and filtering circuit is connected to the drive and power output circuit and the low-voltage switching power supply circuit. After the drive and power output circuit An over-current...

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PUM

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Abstract

This invention relates to a kind of programmable frequency converter, by which users can control the engine in the light of their demands. It concludes voltage protection circuit, rectifying filter circuit, low-voltage switching power supply circuit, drive and power output circuit, signal disposing circuit, overcurrent and overload detection circuit and three-phase frequency converting output of controlling engine. The signal disposing circuit concludes frequency converting speed setting controller, programmable processor and user program memory. The user-defined programs input into the user program processor through user program memory. The signals processed by the program processor and the signals of overcurrent and overload detection circuit are used as the input signals of frequency converting speed setting controller. Its output signals are connected with drive and power output circuit. This invention has frequency converter of universal engines. It resolves the questions that the modality of frequency converter can not change and the work is simplex.

Description

technical field [0001] The invention relates to a frequency converter of a three-phase asynchronous motor, in particular to a program-controlled frequency converter capable of controlling the motor and its external machinery according to the needs of the user. Background technique [0002] The existing frequency converter of the motor is developed on the basis of the speed-regulating motor. Compared with the speed-regulating motor, the frequency-changing speed controller has stable working performance and good power saving performance, so its application fields are all over the world. Light industry, home appliances, metallurgy, machinery and other industries. The frequency conversion speed controller of the motor mainly realizes the starting, stopping, acceleration and deceleration of the motor by controlling the parameters such as the frequency and voltage of the motor. And the control of the slip rate realizes the precise control of the angle, but there are many control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/04H02P27/06G05B19/04G05B19/05H02M1/14
Inventor 李邦庆
Owner 李帮庆
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