CN206930688U - A kind of dynamic distortion power source based on high speed DMA fitting - Google Patents
A kind of dynamic distortion power source based on high speed DMA fitting Download PDFInfo
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- CN206930688U CN206930688U CN201720725802.8U CN201720725802U CN206930688U CN 206930688 U CN206930688 U CN 206930688U CN 201720725802 U CN201720725802 U CN 201720725802U CN 206930688 U CN206930688 U CN 206930688U
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Abstract
The utility model embodiment discloses a kind of dynamic distortion power source based on high speed DMA fitting, for solving, the tester for electric energy meter or system can not produce the nonlinear waveforms such as the multiple zero passage waveform of peaked wave, voltage, and the technical problem that measurement standard causes measuring accuracy of the tester under fluctuating load to examine using standard electric energy meter mode in the prior art.The utility model embodiment includes：RAM, dma controller, Dual-channel digital analog converter, power amplifier, the waveform of default each cycle is stored in RAM；RAM, dma controller, Dual-channel digital analog converter, power amplifier are sequentially connected, and dma controller is used to transmitting the waveform of each cycle in RAM into Dual-channel digital analog converter the fitting for carrying out waveform by the typing order automatic cycle of waveform；Power amplifier is used to amplifying and exporting the waveform after fitting.
Description
Technical field
It the utility model is related to Electrical Measuring Instrument field of instrumentation technology, more particularly to a kind of dynamic based on high speed DMA fitting
Distortion power source.
Background technology
With application of the development and Power Electronic Technique of Power Electronic Technique in all trades and professions, modern industrial production is set
The capacity of standby middle current converter is also increasing, and quantity is more and more, and load of the power network under actual operating state is usually not
It is stable state, and increasing, the fluctuation pattern disunity that distorts, and the test condition of traditional electric energy meter typically requires stable state work(
Rate source, the measuring accuracy under fluctuating load cannot often be examined, and the load under actual operating state is often not stable state,
This is possible to cause such situation：Electric energy meter is qualified in the first inspection in laboratory, examines and determine unqualified after hanging net operation, removes and send
It is qualified again to laboratory verification.The whether accurate of electric energy measurement data directly influences interests between power grid enterprises and user
And the reasonability of transaction.Therefore, industry relevant criterion suggests that the test of electric energy meter needs to increase non-linear test waveform, especially
It is the test waveforms such as the multiple zero passage waveform of voltage, peaked wave, and these waveforms have no the tester of specialty, mesh both at home and abroad at present
Preceding electric energy industry can not solve nonlinear load test problem.
The test of electric energy meter is typically tested using list, three phase power source or list, three-phase standard electric energy meter at present, technology into
It is ripe to be widely used, it is general to use single, three-phase standard electric energy meter as standard, to demarcate the degree of accuracy of tested electric energy meter, the program
The advantages of be that design difficulty is not high, cost is cheap, technology maturation, and shortcoming is that electric energy under the load that can not test dynamic distortion misses
Difference.The electric energy meter that a vector measurement calibration system FLUKE 6105 of Fiuke Co., Ltd's manufacture can be tested under integer harmonics misses
Difference, but the nonlinear waveforms such as the multiple zero passage waveform of peaked wave, voltage (Fourier's incomplete decomposing waveform) can not be produced.
Utility model content
The utility model embodiment discloses a kind of dynamic distortion power source based on high speed DMA fitting, solves existing
The technology of tester or system in to(for) electric energy meter can not produce the nonlinear waves such as the multiple zero passage waveform of peaked wave, voltage
Shape, and measurement standard causes measuring accuracy of the tester under fluctuating load to examine using standard electric energy meter mode
Technical problem.
The utility model embodiment provides a kind of dynamic distortion power source based on high speed DMA fitting, including：
RAM, dma controller, Dual-channel digital analog converter, power amplifier, default each cycle is stored in RAM
Waveform；
RAM, dma controller, Dual-channel digital analog converter, power amplifier are sequentially connected, and dma controller is used for RAM
In each cycle waveform by the typing order automatic cycle of waveform transmit to Dual-channel digital analog converter carry out waveform plan
Close；
Power amplifier is used to amplifying and exporting the waveform after fitting.
Alternatively, dma controller is connected by dma bus with RAM.
Alternatively, RAM is also connected with DSP Core by bus.
Alternatively, DSP Core are also associated with processing terminal, and processing terminal is used to pass through advance caused cycle waveform
DSP Core are downloaded to RAM.
Alternatively, processing terminal is connected by ethernet physical layer with DSP Core；
Connected between ethernet physical layer and DSP Core by bus.
Alternatively, dma controller is connected by synchronous serial interface with Dual-channel digital analog converter.
Alternatively, power amplifier includes current power amplifier and voltage power amplifier；
Current power amplifier and the A channel of Dual-channel digital analog converter connect；
The channel B of voltage power amplifier and Dual-channel digital analog converter connects.
Alternatively, Dual-channel digital analog converter is the Dual-channel digital analog converter of 16 bytes.
As can be seen from the above technical solutions, the utility model embodiment has advantages below：
The utility model embodiment provides a kind of dynamic distortion power source based on high speed DMA fitting, including：RAM、
Dma controller, Dual-channel digital analog converter, power amplifier, the waveform of default each cycle is stored in RAM；RAM、DMA
Controller, Dual-channel digital analog converter, power amplifier are sequentially connected, and dma controller is used for the ripple of each cycle in RAM
Shape is transmitted to Dual-channel digital analog converter the fitting for carrying out waveform by the typing order automatic cycle of waveform；Power amplifier is used for
Amplify and export the waveform after fitting.By the way that the waveform of every kind of cycle, including distorted waveform, recording etc. is non-thread in the present embodiment
Property waveform, is stored in RAM and RAM waveform automatic cycle is sent into Dual-channel digital analog converter using high speed DMA controller
Complete the fitting of random waveform and through power amplifier amplify to export, so as to obtain including dynamic distortion nonlinear waveform
Various waveform outputs, realize the test and calibration of dynamic distortion load, solve in the prior art for electric energy meter
Tester or system can not produce the nonlinear waveforms such as the multiple zero passage waveform of peaked wave, voltage, and measurement standard uses standard
Electric energy meter mode and the technical problem for causing measuring accuracy of the tester under fluctuating load to examine.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the one of a kind of dynamic distortion power source based on high speed DMA fitting provided in the utility model embodiment
The structural representation of individual embodiment；
Fig. 2 be the utility model embodiment in provide it is a kind of based on high speed DMA fitting dynamic distortion power source it is another
The structural representation of one embodiment；
Fig. 3 is a kind of DMA of the dynamic distortion power source based on high speed DMA fitting provided in the utility model embodiment
Automatic transmitting procedure schematic diagram；
Fig. 4 (a) is a kind of dynamic distortion power source based on high speed DMA fitting provided in the utility model embodiment
DMA address position schematic diagram；
Fig. 4 (b) is a kind of dynamic distortion power source based on high speed DMA fitting provided in the utility model embodiment
DMA channel control switching explanation schematic diagram.
Embodiment
The utility model embodiment discloses a kind of dynamic distortion power source based on high speed DMA fitting, existing for solving
Have in technology that can not to produce the multiple zero passage waveform of peaked wave, voltage etc. non-linear for the tester or system of electric energy meter
Waveform, and measurement standard causes measuring accuracy of the tester under fluctuating load to examine using standard electric energy meter mode
The technical problem of core.
Fig. 1 and Fig. 2 are referred to, a kind of dynamic distortion based on high speed DMA fitting provided in the utility model embodiment
One embodiment of power source includes：
RAM1, dma controller 2, Dual-channel digital analog converter 3, power amplifier 4, store in RAM1 default each
The waveform of cycle；
RAM1, dma controller 2, Dual-channel digital analog converter 3, power amplifier 4 are sequentially connected, and dma controller 2 is used for
The waveform of each cycle in RAM1 is transmitted to Dual-channel digital analog converter 3 by the typing order automatic cycle of waveform and enters traveling wave
The fitting of shape；
Power amplifier 4 is used to amplifying and exporting the waveform after fitting.
Wherein, dma controller 2, Dual-channel digital analog converter 3, the quantity of power amplifier 4 are not specifically limited, can root
Selected according to being actually needed, meet 1:1:2 corresponding annexation.
Further, dma controller 2 is connected by dma bus with RAM1.
Further, RAM1 is also connected with DSP Core5 by bus.
Further, DSP Core5 are also associated with processing terminal 6, and processing terminal 6 is used for will advance caused cycle waveform
RAM1 is downloaded to by DSP Core5.
Further, processing terminal 6 is connected by ethernet physical layer 7 with DSP Core5；
Connected between ethernet physical layer 7 and DSP Core5 by bus.
Further, dma controller 2 is connected by synchronous serial interface with Dual-channel digital analog converter.
Further, power amplifier 4 includes current power amplifier and voltage power amplifier；
Current power amplifier is connected with the A channel of Dual-channel digital analog converter 3；
Voltage power amplifier is connected with the channel B of Dual-channel digital analog converter 3.
Further, Dual-channel digital analog converter 3 is the Dual-channel digital analog converter of 16 bytes.
It is a kind of knot of the dynamic distortion power source based on high speed DMA fitting provided the utility model embodiment above
The detailed description of structure, a kind of dynamic distortion power based on high speed DMA fitting that the utility model embodiment will be provided below
The concrete operating principle in source is described in detail.
Referring to Fig. 2, by processing terminal 6, such as computer, notebook, Intelligent treatment terminal in the utility model, will be each
The waveform (including Ua, Ia, Ub, Ib, Uc, Ic passage) of cycle downloads to RAM1 by ethernet physical layer 7 and DSP Core5
In, it should be noted that the waveform of each cycle on processing terminal 6 can calculate generation or artificial fitting by MATLAB instruments
Produce, waveform can also be produced by the actual recording of oscillograph or oscillograph scene.Wherein, processing terminal 6 downloads to waveform
RAM1 speed is determined by the speed of Ethernet and DSP Core5 speed, when waveform is all downloaded to RAM1 by processing terminal 6
In after, DSP Core5 start the first dma controller 2a, the second dma controller 2b, the 3rd dma controller 2c, automatically handle
RAM1 waveform passes through the first dma controller 2a, the second dma controller 2b, the 3rd dma controller 2c and the first synchronous serial interface
8a, the second synchronous serial interface 8b, the 3rd synchronous serial interface 8c are sent to the first Dual-channel digital analog converter 3a, the second binary channels digital-to-analogue conversion
The waveform fitting output of distorting loads is realized on device 3b, the 3rd Dual-channel digital analog converter 3c, passes through the after waveform fitting output
One voltage power amplifier 4Ua, the first current power amplifier 4Ia and second voltage power amplifier 4Ub, the second current power
Amplifier 4Ib and tertiary voltage power amplifier 4Uc, the 3rd current power amplifier 4Ic realize the amplification and load of signal
The output of power.Wherein, DSP Processor 9 uses ADSP-BF609Blackfin processors, the built-in Ethernet thing of the processor
Manage the synchronous serial interface 8a of layer 7 and first, the second synchronous serial interface 8b, the 3rd synchronous serial interface 8c and DSP Core5 and the first DMA controls
Device 2a processed, the second dma controller 2b, the 3rd dma controller 2c.DSP Processor 9 can realize the data RAM1 by every cycle
80000 points of waveform is not realized by DSP Core5 intervention and automatically delivered.
Random waveform (containing distorted waveform or recording) is connect by the network of low speed by processing terminal 6 in the utility model
Mouth is sent to RAM1, and RAM1 waveform automatic cycle is then sent to Dual-channel digital analog converter 3 using the dma controller 2 of high speed
Complete the fitting of random waveform, due to being automatically controlled using dma controller 2, while not consuming DSP Core5 it is achieved thereby that
80000 points of waveform fittings per cycle export, and can accurately be exported by the high-resolution of Dual-channel digital analog converter 3.Binary channels
Digital analog converter 3 realized using 16BIT AD5545 chips, the address bit that the switchings of two passages is inputted by AD5545 chips
To realize, first voltage power amplifier 4Ua, second voltage power amplifier 4Ub, tertiary voltage power amplifier 4Uc pass through
Power supply operational amplifier is realized using series negative feedback, and alternating current-direct current output can be achieved and band is wider than 1MHz, working power is +/-
200V can realize exchange 100V output, the first current power amplifier 4Ia, the second current power amplifier 4Ib, the 3rd electric current
Power amplifier 4Ic maximum output current is 15A, and alternating current-direct current stream 10A output can be achieved.
In the utility model dma controller 2 to the self-propagating process of waveform as shown in figure 3, the first DAM controllers 2a
Control RAM1 address automatic circle transmission in order, each sampling from address 1 to address 80000*2 (two passages of Ua and Ia)
The number of significant digit of point RAM waveforms is 18BIT, and front two is address bit, for selecting the first Dual-channel digital analog converter 3a A to lead to
Road or channel B, rear 16Bit are the wave numerics of each sampled point, and the Ua and Ia waveform storage order that staggers is：Ua1、Ia1、
Ua2, Ia...Ua80000, Ia80000, the 2nd DAM controllers 2b address ram is from address 1 to address 80000*2 (Ub and Ib
Two passages) automatic circle transmission in order, the number of significant digit per sampled point RAM waveforms is 18BIT, and front two is address bit,
For selecting the second Dual-channel digital analog converter 3b A channel or channel B, rear 16Bit is the wave numerics of each sampled point, Ub
It is Ub1, Ib1, Ub2, Ib...Ub80000, Ib80000 with the Ib waveform storage order that staggers, the 3rd DAM controllers 2c RAM
Address automatic circle transmission in order from address 1 to address 80000*2 (two passages of Uc and Ic), per sampled point RAM waveforms
Number of significant digit is 18BIT, and front two is address bit, for selecting the 3rd Dual-channel digital analog converter 3c A channel or channel B,
16Bit is the wave numerics of each sampled point afterwards, Uc and Ic waveform stagger storage order be Uc1, Ic1, Uc2,
Ic...Uc80000、Ic80000。
DMA of the present utility model automatically controls passage switching output as shown in Fig. 4 (a) to Fig. 4 (b), RAM1 storages Ua's
The high address position of sampled value is：A1 is 1, A0 0；The high address position of storage Ia sampled points is：A1 is 0, A0 1；Storage
The 16Bit numerical value of Ua sampled value is D15~D0, and the 16Bit numerical value for depositing Ia sampled value is D15~D0, passage B and passage
C is identical with passage A principle.Specifically, as shown in figure 4, dma controller 2a when sampled point 1 (Ua) is exported, is understood most
High-order and secondary high-order A0 outputs are #01B, and it is #10B that highest order and time high-order A0 can be exported when exporting sampled point 1 (Ia),
As long as it is in advance (1 address location so in RAM areas<<And (2 16)<<16), waveform below will automatically select D/A (3a)
For A channel or channel B.UB and IC with UC with the IC course of work are identical with UAIA.
The utility model embodiment provides a kind of dynamic distortion power source based on high speed DMA fitting, including：RAM、
Dma controller, Dual-channel digital analog converter, power amplifier, the waveform of default each cycle is stored in RAM；RAM、DMA
Controller, Dual-channel digital analog converter, power amplifier are sequentially connected, and dma controller is used for the ripple of each cycle in RAM
Shape is transmitted to Dual-channel digital analog converter the fitting for carrying out waveform by the typing order automatic cycle of waveform；Power amplifier is used for
Amplify and export the waveform after fitting.By the way that the waveform of every kind of cycle, including distorted waveform, recording etc. is non-thread in the present embodiment
Property waveform, is stored in RAM and RAM waveform automatic cycle is sent into Dual-channel digital analog converter using high speed DMA controller
Complete the fitting of random waveform and through power amplifier amplify to export, so as to obtain including dynamic distortion nonlinear waveform
Various waveform outputs, realize the test and calibration of dynamic distortion load, solve in the prior art for electric energy meter
Tester or system can not produce the nonlinear waveforms such as the multiple zero passage waveform of peaked wave, voltage, and measurement standard uses standard
Electric energy meter mode and the technical problem for causing measuring accuracy of the tester under fluctuating load to examine.
A kind of dynamic distortion power source based on high speed DMA fitting provided by the utility model has been carried out in detail above
Introduce, for those of ordinary skill in the art, according to the thought of the utility model embodiment, in embodiment and application
There will be changes in scope, in summary, this specification content should not be construed as to limitation of the present utility model.
Claims (8)
- A kind of 1. dynamic distortion power source based on high speed DMA fitting, it is characterised in that including：RAM, dma controller, Dual-channel digital analog converter, power amplifier, default each cycle is stored in the RAM Waveform；The RAM, the dma controller, the Dual-channel digital analog converter, the power amplifier are sequentially connected, the DMA Controller is used to by the typing order automatic cycle of the waveform transmit the waveform of each cycle in the RAM to described double Passage digital analog converter carries out the fitting of the waveform；The power amplifier is used to amplifying and exporting the waveform after fitting.
- 2. the dynamic distortion power source according to claim 1 based on high speed DMA fitting, it is characterised in that the DMA controls Device processed is connected by dma bus with the RAM.
- 3. the dynamic distortion power source according to claim 1 based on high speed DMA fitting, it is characterised in that the RAM is also DSP Core are connected with by bus.
- 4. the dynamic distortion power source according to claim 3 based on high speed DMA fitting, it is characterised in that the DSP Core is also associated with processing terminal, and the processing terminal is used to download by the DSP Core caused cycle waveform in advance To the RAM.
- 5. the dynamic distortion power source according to claim 4 based on high speed DMA fitting, it is characterised in that the processing Terminal is connected by ethernet physical layer with the DSP Core；Connected between the ethernet physical layer and the DSP Core by bus.
- 6. the dynamic distortion power source according to claim 1 based on high speed DMA fitting, it is characterised in that the DMA controls Device processed is connected by synchronous serial interface with the Dual-channel digital analog converter.
- 7. the dynamic distortion power source according to claim 1 based on high speed DMA fitting, it is characterised in that the power Amplifier includes current power amplifier and voltage power amplifier；The current power amplifier is connected with the A channel of the Dual-channel digital analog converter；The voltage power amplifier is connected with the channel B of the Dual-channel digital analog converter.
- 8. the dynamic distortion power source according to claim 1 based on high speed DMA fitting, it is characterised in that the bilateral Road digital analog converter is the Dual-channel digital analog converter of 16 bytes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422156A (en) * | 2017-06-21 | 2017-12-01 | 广东电网有限责任公司电力科学研究院 | A kind of dynamic distortion power source based on high speed DMA fitting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422156A (en) * | 2017-06-21 | 2017-12-01 | 广东电网有限责任公司电力科学研究院 | A kind of dynamic distortion power source based on high speed DMA fitting |
| CN107422156B (en) * | 2017-06-21 | 2024-01-19 | 广东电网有限责任公司电力科学研究院 | Dynamic distortion power source based on high-speed DMA fitting |
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