CN105281641A - Vector frequency converter for alternating current motor - Google Patents
Vector frequency converter for alternating current motor Download PDFInfo
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- CN105281641A CN105281641A CN201510187177.1A CN201510187177A CN105281641A CN 105281641 A CN105281641 A CN 105281641A CN 201510187177 A CN201510187177 A CN 201510187177A CN 105281641 A CN105281641 A CN 105281641A
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- frequency converter
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- chip microcomputer
- alternating current
- frequency conversion
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Abstract
The present invention discloses a vector frequency converter for an alternating current motor. The vector frequency converter comprises a control circuit, a frequency conversion output circuit and a singlechip, wherein the control circuit comprises a CPU unit and a signal collecting unit, the CPU unit controls the frequency conversion output circuit according to signals of the signal collecting unit, the singlechip is used for completing interactive transmission with control commands of the CPU unit, an input end of the singlechip is connected with a keyboard while an output end of the singlechip is connected with a display, and the signal collecting unit is an electric current transducer. According to the vector frequency converter provided by the present invention, real-time detection of load parameters of a power output end of the frequency conversion output circuit, and the CPU unit can thus carry out calculation and coordination according to the load parameters, then sends a control command to the frequency conversion output circuit, and converts the control command to output control of frequency, voltage and current of the motor, thereby completing on-off control of a pump and realizing underload protection and power saving control of the pump. Meanwhile, a user can remotely monitor operating situations of the converter, thereby bringing convenience for usage of the user.
Description
Technical field
The present invention relates to converter technology field, particularly a kind of alternating current machine vector frequency converter.
Background technology
Under current scientific and technological social environment, life, the production of people be unable to do without the immersed pump classes such as immersible pump, submersible sewage pump, oil-immersed pump, compared with conventional pump class, this kind of pump class has a very large feature to be exactly the cooling agent that fluid load is the pump housing simultaneously, namely this kind of pump class is not suitable for long-time no-load running, during no-load running, on the one hand owing to lacking the cooling effect of fluid load, will be burnt in general tens minutes, had a strong impact on the useful life of the pump housing; On the other hand, because the no-load running of the pump housing will waste electric energy greatly.
Along with the development of electronic semi-conductor's technology, mostly adopt vector frequency converter to provide the power supply of voltage regulation and frequency modulation for alternating current machine, the exciting current and the torque current that realize alternating current machine separately accurately control.And currently used frequency converter comprises frequency conversion output circuit and control circuit; control circuit comprises CPU element and fault message detection module; CPU element exports according to the power supply of the signal controlling inversion unit of fault message detection module, to realize the protection such as overvoltage, under voltage, overload, over torque, overcurrent to power consumption equipments such as motors.In actual applications, this kind of frequency converter achieves and controls the science of conventional pump class, but cannot realize the underload protection to above-mentioned immersed pump class, and Energy Saving Control.
Summary of the invention
The object of the invention is to provide a kind of alternating current machine vector frequency converter.
For achieving the above object, the present invention implements according to following technical scheme:
A kind of alternating current machine vector frequency converter, comprise control circuit and frequency conversion output circuit, control circuit comprises CPU element and signal gathering unit, CPU element is according to the signal controlling frequency conversion output circuit of signal gathering unit, also comprise the single-chip microcomputer of the mutual transmission of control command between CPU element, the input of single-chip microcomputer is connected with keyboard, and the output of single-chip microcomputer is connected with display, and described signal gathering unit is current sensor.
Scheme as a further improvement on the present invention, described signal gathering unit also comprises fault message detection module, and fault message detection module provides fault message for CPU element.
Scheme as a further improvement on the present invention, the PORT COM of described single-chip microcomputer is connected with wireless transport module.
Preferably, described single-chip microcomputer is AT89S51 single-chip microcomputer.
Compared with prior art, the present invention is owing to including current sensor in signal gathering unit, achieve the load parameter of the power output end detecting frequency conversion output circuit in real time, thus make CPU element carry out calculating according to load parameter, coordinate after control command is sent to frequency conversion output circuit, and be converted to frequency to motor, voltage, electric current output control, complete the on off control of pump, the underload protection and the economize on electricity that realize pump control; Single-chip microcomputer completes the mutual transmission of control command between CPU element; make single-chip microcomputer receive operating desk by internal programmable logic give the various action command such as startup, shutdown, F.F., rewind, reset of frequency converter and externally export relevant logical order; the external circuit of single-chip microcomputer carries display and keyboard; reduce equipment volume; use voltage is low; information interaction and the remote monitoring to frequency converter can be carried out by wireless transport module and host computer simultaneously; make user can the ruuning situation of remote monitoring frequency converter, convenient for users to use.
Accompanying drawing explanation
Fig. 1 is circuit structure block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further described, is used for explaining the present invention in illustrative examples of this invention and explanation, but not as a limitation of the invention.
A kind of alternating current machine vector frequency converter as shown in Figure 1, comprise control circuit and frequency conversion output circuit, control circuit comprises CPU element and signal gathering unit, CPU element is according to the signal controlling frequency conversion output circuit of signal gathering unit, also comprise the single-chip microcomputer of the mutual transmission of control command between CPU element, the input of single-chip microcomputer is connected with keyboard, and the output of single-chip microcomputer is connected with display, and described signal gathering unit is current sensor.This frequency converter can adopt AT89S51 single-chip microcomputer to complete the mutual transmission of control command between CPU element, make AT89S51 single-chip microcomputer receive operating desk by internal programmable logic give the various action command such as startup, shutdown, F.F., rewind, reset of frequency converter and externally export relevant logical order, AT89S51 single-chip microcomputer carries the trip information of display display CPU element, provide good human-computer interaction interface, achieve more intuitive information display function; AT89S51 single-chip microcomputer carries keyboard and provides pre-set parameter for CPU element, is convenient to the amendment of user to parameter, the operation such as startup, stopping, failure reset of frequency converter.Adopt fault message detection module to provide fault message for CPU element, achieve the detection of the information such as the voltage of this frequency converter, electric current, temperature, extend the useful life of frequency converter.AT89S51 single-chip microcomputer connects the information interaction that wireless transport module realizes between CPU element and host computer, for the remote monitoring of frequency converter, make user can the ruuning situation of remote monitoring frequency converter, convenient for users to use
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, the technology distortion that every technical scheme according to the present invention is made, and all falls within protection scope of the present invention.
Claims (4)
1. an alternating current machine vector frequency converter, comprise control circuit and frequency conversion output circuit, control circuit comprises CPU element and signal gathering unit, CPU element is according to the signal controlling frequency conversion output circuit of signal gathering unit, it is characterized in that: the single-chip microcomputer also having comprised the mutual transmission of control command between CPU element, the input of single-chip microcomputer is connected with keyboard, and the output of single-chip microcomputer is connected with display, and described signal gathering unit is current sensor.
2. alternating current machine vector frequency converter according to claim 1, is characterized in that: described signal gathering unit also comprises fault message detection module, and fault message detection module provides fault message for CPU element.
3. alternating current machine vector frequency converter according to claim 1, is characterized in that: the PORT COM of described single-chip microcomputer is connected with wireless transport module.
4. alternating current machine vector frequency converter according to claim 1, is characterized in that: described single-chip microcomputer is AT89S51 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510187177.1A CN105281641A (en) | 2015-04-20 | 2015-04-20 | Vector frequency converter for alternating current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510187177.1A CN105281641A (en) | 2015-04-20 | 2015-04-20 | Vector frequency converter for alternating current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105281641A true CN105281641A (en) | 2016-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510187177.1A Pending CN105281641A (en) | 2015-04-20 | 2015-04-20 | Vector frequency converter for alternating current motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN105281641A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702197A (en) * | 2017-09-30 | 2018-02-16 | 吉林同鑫热力集团股份有限公司 | A kind of multi-segment time on-off controlling system for heat exchange station |
| CN112158561A (en) * | 2020-09-29 | 2021-01-01 | 国电泉州热电有限公司 | System and method for determining fault point of coal feeder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0458778A (en) * | 1990-06-26 | 1992-02-25 | Fuji Electric Co Ltd | Vector controlled vvvf inverter |
| CN1545197A (en) * | 2003-07-29 | 2004-11-10 | 北京利德华福电气技术有限公司 | Full digitalized vector control type high-voltage large-power frequency converter based on DSP chip |
| CN202334434U (en) * | 2011-11-17 | 2012-07-11 | 淄博三品电子科技有限公司 | High-performance vector frequency converter |
| CN202334326U (en) * | 2011-11-17 | 2012-07-11 | 淄博三品电子科技有限公司 | Mini high-end vector frequency converter |
-
2015
- 2015-04-20 CN CN201510187177.1A patent/CN105281641A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0458778A (en) * | 1990-06-26 | 1992-02-25 | Fuji Electric Co Ltd | Vector controlled vvvf inverter |
| CN1545197A (en) * | 2003-07-29 | 2004-11-10 | 北京利德华福电气技术有限公司 | Full digitalized vector control type high-voltage large-power frequency converter based on DSP chip |
| CN202334434U (en) * | 2011-11-17 | 2012-07-11 | 淄博三品电子科技有限公司 | High-performance vector frequency converter |
| CN202334326U (en) * | 2011-11-17 | 2012-07-11 | 淄博三品电子科技有限公司 | Mini high-end vector frequency converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702197A (en) * | 2017-09-30 | 2018-02-16 | 吉林同鑫热力集团股份有限公司 | A kind of multi-segment time on-off controlling system for heat exchange station |
| CN112158561A (en) * | 2020-09-29 | 2021-01-01 | 国电泉州热电有限公司 | System and method for determining fault point of coal feeder |
| CN112158561B (en) * | 2020-09-29 | 2022-04-01 | 国能(泉州)热电有限公司 | System and method for determining fault point of coal feeder |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160127 |