CN106773932B - Based on the digitlization of FPGA by wave current limiting system and guard method - Google Patents
Based on the digitlization of FPGA by wave current limiting system and guard method Download PDFInfo
- Publication number
- CN106773932B CN106773932B CN201611110590.9A CN201611110590A CN106773932B CN 106773932 B CN106773932 B CN 106773932B CN 201611110590 A CN201611110590 A CN 201611110590A CN 106773932 B CN106773932 B CN 106773932B
- Authority
- CN
- China
- Prior art keywords
- fpga
- circuit
- current
- signal
- switching device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21137—Analog to digital conversion, ADC, DAC
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provide it is a kind of based on the digitlization of FPGA by wave current limiting system, it includes current measurement circuit, electronic power switch device and switching device driving circuit, it further include analog converting circuit, A/D converter circuit and fpga chip, the electric current for the switching device that wherein current measurement circuit detects, become the signal for being suitble to A/D converter circuit acquisition through analog converting circuit transformations, digital signal is converted to by A/D converter circuit, fpga chip obtains the digital signal, carry out overcurrent judgement, output pulse width signal dutyfactor gives switching device driving circuit driving power electronic switching device.The present invention is realized using digitizing solution by wave current limit, the arithmetic speed of FPGA, which is exceedingly fast, (can reach tens MHz, and calculation function is stronger), increasingly complex algorithm can be added in wave limiting function, and efficient fault tolerant mechanism, so that there is higher flexibility, safety and reliability by wave current limiting system.
Description
Technical field
The present invention relates to electronic power switch device overcurrent protection fields, and in particular to it is a kind of based on the digitlization of FPGA by
Wave current limiting system and guard method.
Background technique
With the continuous development of power electronic devices and control technology, Technics of Power Electronic Conversion system industrial electric driving,
Communications and transportation, electric system, communication system and new energy field are widely applied.And the voltage of switching device
Grade and current class are also higher and higher, and the requirement to the safe and stable operation ability of Technics of Power Electronic Conversion system equally also has sternly
Lattice requirement.And in practical applications, main circuit is likely to occur short-circuit or unexpected electric current fluctuation, although can use power electronics
The current foldback circuit that device itself provides realizes the judgement of overcurrent, and the locking of switching device is completed by control system, still
The threshold value of power electronic devices itself overcurrent protection is high, and not can be carried out flexible modulation, while being by exclusive circuit and control
It unites intrinsic time delay, it is longer to also result in protection process execution time.Therefore, after there is flow problem, to electric power electricity
The overcurrent impact of sub switch device influences very big.
Ideal method is the method taken by wave current limit, but at present in the technical implementation method
Based on mainly being realized with analog circuit, for using the timing sampling of microprocessor, analog circuit speed is fast, can be quick
Realize current-limiting function, but analog circuit also deposits following problem: (1) Analog Circuit Design is complex, is not easy to later period liter
Grade.And when the wave limiting protection of analog circuit realization multiple switch device, each device is required to configure independent circuit, is
Complexity of uniting improves.(2) analog circuit is difficult to realize complicated algorithm and fault tolerance.(3) in analog circuit, fluxion is crossed
Value, overcurrent return to numerical value, minimum pulse width numerical value once setting, and can not achieve online modification, complicated information is difficult to and micro process
Device interacts.(4) analog circuit is only only completed wave limiting function, and control system still needs.
Summary of the invention
The technical problem to be solved by the present invention is provide it is a kind of based on the digitlization of FPGA by wave current limiting system and guarantor
Maintaining method, so that there is higher flexibility, safety and reliability by wave current limiting system.
The technical solution taken by the invention to solve the above technical problem are as follows: a kind of electric by wave based on the digitlization of FPGA
Ductility limit system, it includes current measurement circuit, electronic power switch device and switching device driving circuit, it is characterised in that:
It further includes analog converting circuit, A/D converter circuit and fpga chip, the switching device that wherein current measurement circuit detects
Electric current becomes the signal for being suitble to A/D converter circuit acquisition through analog converting circuit transformations, is converted to digital letter by A/D converter circuit
Number, fpga chip obtains the digital signal, carries out overcurrent judgement, and output pulse width signal dutyfactor drives to switching device driving circuit
Dynamic electronic power switch device.
By above system, the current measurement circuit is current sensor, photo-electricity mutual-inductor or hall device.
By above system, the electronic power switch device is several, and each electronic power switch device is corresponding with
One group of current measurement circuit, switching device driving circuit, analog converting circuit and A/D converter circuit, each A/D converter circuit difference
It is connect with the fpga chip, fpga chip is connect with each switching device driving circuit respectively.
By above system, it further includes the microprocessor for sharing fpga chip algorithm, is connected with the fpga chip
It connects.
It is a kind of based on the digitlization of FPGA by the current protection method of wave current limiting system, it is characterised in that: it includes
Following steps:
Signal acquisition: the current signal of the electronic power switch device after acquisition analog-to-digital conversion；
Pulse width signal duty ratio normal value calculate: under normal condition, the current signal of electronic power switch device be less than or
Equal to overcurrent setting value, pulse width signal duty ratio normal value is calculated by the current signal；
The current signal judgement and control of electronic power switch device: when the current signal of electronic power switch device is greater than
When overcurrent setting value, pulse width signal duty ratio is reduced to preset minimum and is sent to switching device driving circuit, until electric power
When the current signal of electronic switching device is less than overcurrent return setting value, pulse width signal duty ratio is reverted into pulse width signal duty
Compare normal value.
According to the above method, while the current signals of several electronic power switch devices is acquired, be respectively controlled.
According to the above method, the pulse width signal duty ratio normal value calculates, and is completed by microprocessor；Electronic power switch
The current signal judgement and control of device, are completed by fpga chip.
According to the above method, when signal acquisition, the sample frequency of analog-to-digital conversion is 100kHz-1Mhz.
The invention has the benefit that
1, using digitizing solution realize by wave current limit, the arithmetic speed of FPGA be exceedingly fast (can reach tens MHz, and
Calculation function is stronger), increasingly complex algorithm and efficient fault tolerant mechanism can be added in wave limiting function, so that by wave
Current limiting system has higher flexibility, safety and reliability.
2, it after selecting the A/D chip of multichannel, can once realize the current detecting of multiple switch device, realize multiple switch
Device by wave current limit.
3, when controlling multiple electronic power switch devices, pulse width signal duty ratio is completed by increasing microprocessor
It calculates, FPGA can transmit information, microprocessor and FPGA paired running to micro process in time, and the safety for further increasing system is steady
It is qualitative.
Detailed description of the invention
Fig. 1 is the system principle diagram of one embodiment of the invention.
Fig. 2 is the system principle diagram of further embodiment of this invention.
Fig. 3 is that switching device driving signal generates schematic diagram.
Fig. 4 is the method flow diagram of one embodiment of the invention.
Specific embodiment
Below with reference to specific example and attached drawing, the present invention will be further described.
Embodiment one:
As shown in Figure 1, it is a kind of based on the digitlization of FPGA by wave current limiting system include current measurement circuit, electric power electricity
Sub switch device and switching device driving circuit, further include analog converting circuit, A/D converter circuit and fpga chip, wherein electric current
The electric current for the switching device that measuring circuit detects becomes the letter for being suitble to A/D converter circuit acquisition through analog converting circuit transformations
Number, digital signal is converted to by A/D converter circuit, fpga chip obtains the digital signal, carries out overcurrent judgement, output pulse width letter
Number duty ratio gives switching device driving circuit driving power electronic switching device.
It is a kind of it is above-mentioned based on the digitlization of FPGA by the current protection method of wave current limiting system, such as Fig. 3 and Fig. 4 institute
Show, comprising the following steps:
Signal acquisition: the current signal of the electronic power switch device after acquisition analog-to-digital conversion；
Pulse width signal duty ratio normal value calculate: under normal condition, the current signal of electronic power switch device be less than or
Equal to overcurrent setting value, pulse width signal duty ratio normal value is calculated by the current signal；
The current signal judgement and control of electronic power switch device: when the current signal of electronic power switch device is greater than
When overcurrent setting value, pulse width signal duty ratio is reduced to preset minimum and is sent to switching device driving circuit, until electric power
When the current signal of electronic switching device is less than overcurrent return setting value, pulse width signal duty ratio is reverted into pulse width signal duty
Compare normal value.
The current measurement circuit is current sensor, photo-electricity mutual-inductor or hall device, and current measurement may be implemented
Device, the current signal of measurement can be of ac and is also possible to DC quantity.Such as select the LT208-S7 of LEM company as
Original part is measured, the specified measurement electric current of primary side is 200A, and the secondary specified virtual value in side is 100mA.
Analog converting circuit, according to selected LEM current sensor, which needs the electricity of 100mA
Stream signal is filtered, improves and amplifies, and transformation obtains reasonable voltage, is supplied to A3AD converts the acceptable conjunction of chip institute
Manage voltage range.In view of to be transformed into 5V proper by nargin 100mA, then A2The no-load voltage ratio of analog converting circuit is 40A/V.
Switching device driving circuit receives the pulse-width control signal from fpga chip and completes electronic power switch device
Drive control.Driving circuit may be selected, the binary channels of CONCEPT company, compact drive module 2SC0108T.Switching device can
Select the FF200R12KS4, rated current 200A of EUPEC company.
Embodiment two:
The basic principle of the present embodiment is the same as example 1, the difference is that: as shown in Fig. 2, the electric power
Electronic switching device is several, and each electronic power switch device is corresponding with one group of current measurement circuit, switching device driving
Circuit, analog converting circuit and A/D converter circuit, each A/D converter circuit are connect with the fpga chip respectively, fpga chip
It is connect respectively with each switching device driving circuit.
Wherein several A/D converter circuits can integrate as A/D chip, and user can require to determine AD core according to practical object
Channel number, sampling resolution and the sampling rate of piece.When A/D chip is multichannel, the electricity of multiple switch device can be completed at the same time
Stream sampling provides support by wave current limit for the multiple devices of realization.Such as A/D chip can be AD7606, which can be with
It is completed at the same time the AD transformation on 16,8 tunnel.
FPGA chip circuit completes data acquisition and the wave limiting protection algorism of A/D chip.Fpga chip can be
The chip of any company or brand.According to the capacity of programmed algorithm, and completes function and select suitable size.And FPGA
Various control algolithms and tolerant fail algorithm can also be write according to user demand.If there is multiple devices, then FPGA can be according to reality
More control ports are arranged in situation.The xc6slx45t series core of the Sprtan6 series of Xilinx company may be selected in fpga chip
Piece.
When the electronic power switch device of control is more, simple may be excessive by fpga chip calculation amount, increases at this time
Add a microprocessor that fpga chip is assisted to be calculated.Microprocessor can be the chip of any company or brand, can
According to user function, and completes function and carry out type selecting and design.Such as: 28335 model dsp chip of TI company may be selected.
The present embodiment based on the digitlization of FPGA by the current protection method of wave current limiting system, while acquiring several
The current signal of a electronic power switch device, is respectively controlled.The pulse width signal duty ratio normal value calculates, by micro-
Processor is completed；The current signal judgement and control of electronic power switch device, are completed by fpga chip.According to specifically setting above
Meter, it is assumed that the overcurrent value by wave current limit is 200A, and it is 180A that overcurrent, which returns to setting value, specifically includes the following steps:
Step 1:AD sampling, obtain real-time electric current, and judge whether electric current is greater than overcurrent value 200A, if more than then into
Enter step 2, otherwise without any control, only electric current is monitored.
Step 2: if electric current is greater than 200A, opening at once by wave current limit, duty ratio is set as 1000, and pass through
Switching device driving circuit completes the control of electronic power switch device, and sends information needed to microprocessor.With
The setting of smaller duty ratio, electric current can be gradually reduced.When electric current, which is less than overcurrent, returns to setting value 180A, 3 are entered step.
The duty ratio of exiting in step 3:FPGA by wave current limit function, switching device maintains initial value constant.
Preferably, the sample frequency of analog-to-digital conversion is 100kHz-1Mhz, and speed depends on A/D chip conversion speed, with
And the arithmetic speed of FPGA.The sample rate of analog-to-digital conversion is faster, and control precision is higher, but the cost of A/D chip is also high, can
It is preferentially chosen according to application.
The present invention replaces the wave limiting of traditional analog comparator completion power electronic devices using digitizer
Function, feasibility include: with feature
(1) A/D chip sample rate has reached hundreds of kHz or even MHz ranks, is realized using digitizing solution by wave electric current
Limitation, compared with analog circuit, sampling section is without technical obstruction, can one and after selecting the A/D chip of multichannel
The secondary current detecting for realizing multiple switch device provides support by wave current limit for the multiple devices of realization；
(2) traditional analog circuit formula wave limiting circuit is realized using software program, avoid complicated analog circuit
Design can be realized simultaneously protecting by wave current limit for multiple devices, and the later period can also facilitate realization system function upgrading；
(3) after digitizing, increasingly complex algorithm and efficient fault tolerant mechanism can be added in wave limiting function, can
Further increase the security and stability of system；
(4) FPGA can be with microprocessor interactive information, overcurrent numerical value, return numerical value by wave limitation electric current, and minimum
The numerical value of pulsewidth can carry out offline or online modification according to different application objects, and overcurrent events occur and overcurrent returns
Afterwards, FPGA can also transmit information to micro process in time, thus can further improve control system performance；
(5) microprocessor model can be according to requiring to be chosen, and with FPGA paired running, FPGA can also write control
Algorithm is detached from microprocessor isolated operation.
Above embodiments are merely to illustrate design philosophy and feature of the invention, and its object is to make technology in the art
Personnel can understand the content of the present invention and implement it accordingly, and protection scope of the present invention is not limited to the above embodiments.So it is all according to
It is within the scope of the present invention according to equivalent variations made by disclosed principle, mentality of designing or modification.
Claims (5)
1. it is a kind of based on the digitlization of FPGA by wave current limiting system, it includes current measurement circuit, electronic power switch device
Part and switching device driving circuit, it is characterised in that: it further includes analog converting circuit, A/D converter circuit and fpga chip,
The electric current for the switching device that middle current measurement circuit detects becomes through analog converting circuit transformations and is suitble to A/D converter circuit acquisition
Signal, digital signal is converted to by A/D converter circuit, fpga chip obtains the digital signal, carries out overcurrent judgement, exports arteries and veins
Bandwidth signals duty ratio gives switching device driving circuit driving power electronic switching device；
The current measurement circuit is current sensor, photo-electricity mutual-inductor or hall device；
The electronic power switch device is several, and each electronic power switch device is corresponding with one group of current measurement electricity
Road, switching device driving circuit, analog converting circuit and A/D converter circuit, each A/D converter circuit respectively with the FPGA core
Piece connection, fpga chip are connect with each switching device driving circuit respectively；
Based on the digitlization of FPGA by the current protection method of wave current limiting system the following steps are included:
Signal acquisition: the current signal of the electronic power switch device after acquisition analog-to-digital conversion；
Pulse width signal duty ratio normal value calculates: under normal condition, the current signal of electronic power switch device is less than or equal to
Overcurrent setting value calculates pulse width signal duty ratio normal value by the current signal；
The current signal judgement and control of electronic power switch device: when the current signal of electronic power switch device is greater than overcurrent
When setting value, pulse width signal duty ratio is reduced to preset minimum and is sent to switching device driving circuit, until power electronics
When the current signal of switching device is less than overcurrent return setting value, pulse width signal duty ratio is being reverted into pulse width signal duty ratio just
Constant value.
2. it is according to claim 1 based on the digitlization of FPGA by wave current limiting system, it is characterised in that: it further includes
For sharing the microprocessor of fpga chip algorithm, it is connect with the fpga chip.
3. it is according to claim 2 based on the digitlization of FPGA by wave current limiting system, it is characterised in that: acquire simultaneously
The current signal of several electronic power switch devices, is respectively controlled.
4. it is according to claim 3 based on the digitlization of FPGA by wave current limiting system, it is characterised in that: the arteries and veins
Bandwidth signals duty ratio normal value calculates, and is completed by microprocessor；The current signal judgement and control of electronic power switch device, by
Fpga chip is completed.
5. it is according to claim 3 based on the digitlization of FPGA by wave current limiting system, it is characterised in that: signal acquisition
When, the sample frequency of analog-to-digital conversion is 100kHz-1Mhz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110590.9A CN106773932B (en) | 2016-12-06 | 2016-12-06 | Based on the digitlization of FPGA by wave current limiting system and guard method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110590.9A CN106773932B (en) | 2016-12-06 | 2016-12-06 | Based on the digitlization of FPGA by wave current limiting system and guard method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106773932A CN106773932A (en) | 2017-05-31 |
| CN106773932B true CN106773932B (en) | 2019-03-08 |
Family
ID=58874686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611110590.9A Active CN106773932B (en) | 2016-12-06 | 2016-12-06 | Based on the digitlization of FPGA by wave current limiting system and guard method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106773932B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011506A (en) * | 2017-11-23 | 2018-05-08 | 郑州云海信息技术有限公司 | A kind of Current limited Control method and system of inverter |
| CN110247615B (en) * | 2018-03-09 | 2024-04-12 | 深圳市蓝海华腾技术股份有限公司 | Wave-by-wave current limiting control system and method based on DSP chip and motor controller |
| CN114778935A (en) * | 2022-06-23 | 2022-07-22 | 宁波中车时代传感技术有限公司 | Over-current detection circuit and method suitable for alternating current |
| CN116885937B (en) * | 2023-09-04 | 2023-12-08 | 西安千帆翼数字能源技术有限公司 | Wave-by-wave current limiting method and system for three-phase four-bridge arm inverter |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588124B (en) * | 2008-05-23 | 2012-10-10 | 力博特公司 | Wave-chasing current-limiting control method of diode mid-point clamping multilevel converter |
| CN101557203B (en) * | 2009-03-20 | 2011-06-08 | 深圳市民展科技开发有限公司 | Power amplifier with overcurrent protection |
| CN101710694B (en) * | 2009-11-26 | 2012-12-19 | 上海大学 | Car engine cooling fan blocking/overcurrent protection system and method |
| TWI523420B (en) * | 2013-03-01 | 2016-02-21 | 德律科技股份有限公司 | Testing apparatus with backdriving protection function |
| CN103178695B (en) * | 2013-03-14 | 2016-01-13 | 华北电力大学 | Based on the universal Variable flow control platform of DSP+FPGA |
| CN103383404B (en) * | 2013-07-04 | 2015-11-25 | 清华大学 | Current measurement circuit |
| CN203674694U (en) * | 2013-10-11 | 2014-06-25 | 深圳市伟创电气有限公司 | Cycle-by-cycle current-limiting protection circuit for variable-frequency drive |
| CN103944369B (en) * | 2014-04-17 | 2016-03-23 | 成都麦隆电气有限公司 | A kind of wave-chasing current limiting method and device with short pulse suppression function |
| CN104753050B (en) * | 2015-03-13 | 2018-03-30 | 中国科学院空间应用工程与技术中心 | A kind of constant current protection solid-state power controller and solid state power control method |
| CN204858974U (en) * | 2015-07-22 | 2015-12-09 | 航天长峰朝阳电源有限公司 | High -power intelligence of high reliability power module that flow equalizes |
-
2016
- 2016-12-06 CN CN201611110590.9A patent/CN106773932B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106773932A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106773932B (en) | Based on the digitlization of FPGA by wave current limiting system and guard method | |
| CN105955071B (en) | A kind of load simulation circuit and power stage Emulation of Electrical Machinery test equipment | |
| CN103248294B (en) | Position-sensor-free DC brushless motor double closed loop speed regulation system control method | |
| CN103503291B (en) | The method and apparatus controlled for the firm power/electric current of switched mode power converter | |
| CN102243279B (en) | Apparatus for monitoring fault current in power system | |
| CN106199145B (en) | Ship AC system short circuit current direction determination process based on current changing rate | |
| CN104638913B (en) | Single-inductance double-output switch converters bicyclic voltage-type PFM control and its device | |
| CN105576999B (en) | Input voltage detection circuit and parameter setting and circuit protection method thereof | |
| CN201038719Y (en) | Controller possessing spare quick brake-separating judging circuit | |
| CN103201638B (en) | Supply unit | |
| CN106300989A (en) | High direct voltage high frequency switch power that the variable modulated waveform forward position of a kind of gamut is variable and control method thereof | |
| CN106374420A (en) | DC micro grid converter | |
| CN110333386A (en) | A kind of zero cross detection circuit | |
| Meyer | Enhanced power electronics system for high-performance testing of motor control units in a power HIL environment | |
| CN104078931A (en) | Protective method, protective circuit and protector for three-phase alternating-current power source phase sequence and air conditioner | |
| CN106787841B (en) | Rectification control system with redundant current feedback | |
| CN103609011B (en) | Simple method of controlling for three-phase alternating voltage dc voltage changer | |
| KR101309400B1 (en) | Merging unit with frequency protection function | |
| CN209462234U (en) | A kind of Synchronous Motor Excitation System | |
| CN102570411B (en) | Circuit breaker with a digital data processing device | |
| CN105529951B (en) | The variable inversion controlling method of dead time and system of belt current zero passage Region control | |
| CN104052153B (en) | Integrated form element and construction method for the emulation of bulk power grid stable monitoring system RTDS | |
| CN204733106U (en) | A kind of control system for permanent-magnet synchronous motor | |
| CN109586621A (en) | A kind of brushless direct current motor controller and its control method based on EP1C3 | |
| CN203166470U (en) | Three-phase AC power supply phase sequence protection circuit, protection device and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |