CN107395019A - A kind of electrostatic precipitator high frequency electric source control system - Google Patents

A kind of electrostatic precipitator high frequency electric source control system Download PDF

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Publication number
CN107395019A
CN107395019A CN201710576463.6A CN201710576463A CN107395019A CN 107395019 A CN107395019 A CN 107395019A CN 201710576463 A CN201710576463 A CN 201710576463A CN 107395019 A CN107395019 A CN 107395019A
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China
Prior art keywords
high frequency
control system
frequency electric
electric source
source control
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CN201710576463.6A
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Chinese (zh)
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赵萍
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Bao Wenlong
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Individual
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Priority to CN201710576463.6A priority Critical patent/CN107395019A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A kind of electrostatic precipitator high frequency electric source control system, more advanced zvzcs phase-shifted full-bridge converters are modified to the ZVS phase-shifted full-bridge converters of electrostatic precipitator high frequency electric source control system converter, while controller adds Ethernet interface to adapt to following communication need.

Description

A kind of electrostatic precipitator high frequency electric source control system
Technical field
The present invention relates to electrostatic precipitator high frequency electric source FIELD OF THE INVENTIONThe, and in particular to a kind of electrostatic precipitator high frequency electric source Control system.
Technical background
ZVS phase-shifted full-bridge converters are mainly used in electrostatic precipitator high frequency electric source field, each producer at present, And improved to obtain adjustment waveform, with the development and progress of technology, at present in field of switch power, have begun to make With more advanced zvzcs phase-shifted full-bridge converters, under such circumstances, the present invention then produces.
Existing ZVS phase-shifted full-bridge converters circuit parsing is as shown in Figure 2：
Fig. 3 is described in half of switch periods of master power switch pipe, Q1, and Q4 conductings are switched to Q3, Q2 turn on process In, it is as shown in Figure 3 that 2 points of ab hears voltage Vab, primary side current of transformer IP, and rectifier bridge output voltage Vrect) waveform.
ZVS phase whole-bridging circuits undergo 6 switch mode, are described below in half of switch periods of main power tube：
1. switch the mode l-t0 moment.
Before the to moment, Ql and Q4 conductings.As shown in Fig. 4 (a), primary current is through Q1, main transformer, and Lk, Q4 are to secondary Transmission energy.Voltage Vab=Vi between song, primary current linear rise.
2. switch mode 2.【To, t1】Period.
At the to moment, Q1 shut-offs, due to there is C1 presence, Q1 voltages are slow to be risen, and is zero voltage turn-off.It is electric between bent after Q1 shut-offs Press v it is bent start it is rapid decline, but still greater than 0, so when secondary be still operated in rectification state.It is believed that output filter capacitor L Connected with primary side leakage inductance h.Because inductive current can not be mutated, ' still flow, and be gradually reduced by former direction.Such as Fig. 4 (b) Shown, electric current ' charges to C1, discharged to c3.Vab subtracts d, N 0 at the tl moment.
3. switch mode 3.Itl, f2】Period.
Tl moment, Cl chargings, c3 electric discharges terminate, and % is reduced to O.Q3 anti-and diode D3 is turned on naturally.This【Tl, f2】Q3 is opened in period, then Q3 is that no-voltage is open-minded.When opening Q3, because primary current direction is constant, Q3 is upper to be stood There is electric current to flow through.Primary current b still flows through D3, main transformer, leakage inductance Si and Q4, forms circulation.As shown in Fig. 4 (c).
4. switch mode 4.[t2, the t3] period.
After the tz moment turns off Q4, primary current ' charges to c4, discharged to c2.As shown in Fig. 4 (d).Due to Yah=mono- Vc4, secondary rectifying tube D3 and still begin to turn on, this causes rectifier bridge to be operated in the freewheeling state that four pipes all turn on.Anti- To in the presence of voltage, i.Fall off rate increases.
5. switch mode 5 " f3, t4】Period.
Such as the moment, c2 is discharged to 0, C4 and charges to K.Q2 anti-and diode D2 is turned on naturally, current direction such as Fig. 4 (e) It is shown.Q2 is opened in this period, then Q2 is that no-voltage is open-minded.In addition, primary current fD is in the presence of one VI, rapidly Decline.
6. switch mode 6.【T4, f5】Period.
Primary current f.It is decreased to 0 in the presence of a M and reversely increases, but primary current very little at this moment, no normal direction Load conveying energy, therefore secondary rectifying tube is still operated under freewheeling mode, if Fig. 4 is (shown in D.Until t5 moment, primary side Electric current inversely increases, it is sufficient to powering load.Hereafter primary current powers to the load through loop Q2, h, main transformer, Q3, electricity Road enters the working condition shown in Fig. 4 (g), and handoff procedure terminates.The ZVS phase-shifted full-bridge converters it can be seen from analysis more than Realize Sofe Switch, it is necessary to have enough current draw paralleled power switches electric capacity (additional shunt capacitance and knot in finite time Electric capacity sum) on electric charge, switching tube both end voltage is dropped to 0.
Since the realization of ZVS phase-shifted full-bridge converter Sofe Switch is relevant with primary current, then in the situation of light load Under, primary current is smaller so that the shortcomings that ZVT is increasingly difficult, and this is ZVS phase-shifted full-bridge converter maximums.It is actual Upper advanced arm and lagging leg realize the condition of Sofe Switch difference.During advanced arm switch, secondary rectifying tube is operated in rectification shape State, for output inductor equivalent to being connected in primary side leakage inductance, current changing rate is small, paralleled power switches electric capacity.
On charge extraction speed it is fast.When lagging arm switch, secondary rectifying tube is operated in freewheeling state, and only primary side is leaked Sense maintains primary current, and current changing rate is big, and the charge extraction speed on paralleled power switches electric capacity is slow.Therefore lagging leg is soft opens Close and realize one of the shortcomings that more advanced arm is difficulty, and this is ZVS phase-shifted full-bridge converters.In order to allow lagging leg to realize ZVS more Easily, primary current is increased into most direct idea.The increase of primary current can be by increasing exciting current (main transformer Aerating gap reduces magnetizing inductance), or increase leakage inductance (or additional resonant inductance) to realize.But no matter using it is above-mentioned which kind of Method, it can all increase the loss of dutycycle, i.e., when primary side bears square-wave voltage, due to the presence of inductance on branch road, primary side electricity Stream is smaller, and no normal direction secondary conveys energy, and it is small to be reflected as secondary dutycycle compared with primary side.Duty-cycle loss and Sofe Switch condition Contradiction, and one of the shortcomings that ZVS phase-shifting full-bridge exchangers.
In addition, as shown in Fig. 3 and Fig. 4 (c), primary current is in D3, main transformer, n, when forming circulation between imprisoning, Circuit is still in constant current mode.Larger circulation in this indication circuit be present, circulation is in especially anti-simultaneously two poles of semiconductor devices Large energy is consumed in pipe, causes efficiency to reduce.And discussion in front is pressed, circulation is bigger, and Sofe Switch is easier.Sofe Switch carries One of contradiction between the efficiency that high efficiency and circulation reduce, and the shortcomings that ZVS phase-shifted full-bridge converters.
In summary, ZVS phase-shifted full-bridge converters exist underloading be difficult to Sofe Switch, lagging leg Sofe Switch realize it is tired Difficult, duty-cycle loss is contradicted with Sofe Switch condition and circulating loss quite a few four big inherent defect of efficiency, these Shortcoming limits the scope of application of ZVS phase-shifted full-bridge converters.
The content of the invention
The present invention is modified to for the ZVS phase-shifted full-bridge converters of electrostatic precipitator high frequency electric source control system converter More advanced zvzcs phase-shifted full-bridge converters, while controller adds Ethernet interface to adapt to following communication need.
The zvzcs phase shifts Golden Bridge of ZVZCS phase-shifted full-bridge converter operation principles, series transductor and blocking capacitor Converter is as shown in Figure 1.
Fig. 5 is described in half of switch periods of main power tube, and switching tube is switched to Q3, Q2 conducting from Ql, Q4 conducting are final During, 2 points of ab asks voltage Vab, primary side current of transformer Ip, blocks resistance cb both end voltage Vcb, and rectifier bridge output electricity Press vrect waveform.
ZVZCS phase whole-bridging circuits undergo 5 switch mode, are described below in half of switch periods.
1. switch mode 1, t0 moment.Energy transmits (transferring).
Before the to moment, Q1, Q4 conducting, primary current pass through Ql, cb, main transformer primary side, pulsactor LS and Q4, Charged to blocking capacitor cb, the rise of its voltage.Primary current also raises under input voltage effect.Secondary is operated in rectification shape State, energy is exported for load.
2. switch mode 2.【To, tl】Period.Discharge and recharge (1eadingleg capacitorcharging and discharging).At the to moment, Q1 shut-offs, due to electric capacity cl presence, Ql voltages are slow to be risen, and is zero voltage turn-off.Output filtering Inductance is connected equivalent to primary side leakage inductance, and primary current is not mutated, and is charged to c1, is discharged to c3.Due to original edge voltage direction not Become, secondary side diode is still in rectification state.
3. switch mode 3.【T1, t2】Period.Primary current resets (resetting).
After capacitor charge and discharge terminates.C3 both end voltages are that 0, a3 is anti-and diode D3 is turned on naturally.Hereafter Q3 is opened, then Q3 is that no-voltage is open-minded.Now blocking capacitor cb voltages are left positive right negative, and primary side circulation reduces under the effect of this voltage.In t2 Quarter is decreased to O.
Because original edge voltage starts reversely, secondary commutation diode is existing and Da is begun to turn on, and secondary is started working
In freewheeling state.
4. switch mode 4.【t2,t3】Period.Primary side stops (off).
T2 moment primary currents drop to O, now turn off Q4, then Q4 is zero-current switching.Q2 is opened at the t3 moment.
5. mode 5 is switched,【T3, t4】Period.Duty-cycle loss (duty-cyclelosing).
Such as Fig. 2, it is reverse to saturation conduction, and blocking capacitor cb by blocking to contain pulsactor for actually this process Two processes of charging complete.The t3 moment opens Q2, it is bent between voltage v it is bent=1.And now energy can not be immediately transferred to pair Side, reason are that primary current will make pulsactor saturation, it is necessary to which certain time, when primary current is smaller, secondary still works In freewheeling state.It is reflected as secondary duty-cycle loss.Until pulsactor saturation, when primary current rises to sufficiently large, secondary Diode can just recover rectification state.
Complete half period handoff procedure.
Because advanced arm Sofe Switch condition is identical with ZVS phase-shifted full-bridge converters, as long as and lagging leg can make current reset Zcs is can be achieved with, zvzcs phase-shifted full-bridge converters can realize Sofe Switch in the range of broader (almost full load), more Electrostatic dust collection equipment suitable for electric cleaner field.The characteristic of lagging leg Zero Current Switch is more suitable for IGBT device, therefore more suitable Close in the IGBT common applications applications such as high input voltage.
But compared with ZVS phase-shifted full-bridge converters, the time of current reset is more than primary current and extracts capacitance charge Time.So ZVZCS topologys are more suitable for low frequency switch device, it is not easy to minimize, is understood through our repetition tests, in 20KHZ Below can be with reliability service.
Electrostatic precipitation high frequency electric source Ethernet networking
The present invention is used as 10M/ using ARM families STM32F107 as main processor core using the DM9161A of high performance-price ratio 100M Ethernet PHY chips, RMII interfaces are attached thereto, standard RJ45 interfaces, are supported that level crossing netting twine is adaptive, are met IEEE 802.3-2002 standards.It is illustrated in fig. 7 shown below, by this configuration, can easily realizes following electrostatic precipitator high-frequency electrical All kinds of networking requirements of source control system, realize that such as Telnet is logged in, HTTP embeds webpage, TFTP file transmitting functions, branch DHCP protocol is held, IP and real time execution can be obtained automatically, supports level crossing netting twine adaptation function, a netting twine just can be real Now with router and PC connection.
The technical scheme of use：
A kind of electrostatic precipitator high frequency electric source control system, it is included in progress on the basis of zvzcs phase-shifted full-bridge converters Improve, as shown in figure 1, more adapting to electrostatic precipitator high frequency electric source control system, ensure that the reliability of product, meanwhile, it is quiet Networking is communicated in electric cleaner high frequency electric source control system switching controller and is also in the 485 of original MODBUS communication protocols On mouth, it is difficult to meet that the increasingly flourishing information management control of present society requires that the present invention uses more advanced ether Netcom Agreement is interrogated, 10M transmission is supported, can preferably adapt to the demand of future development.
Brief description of the drawings
Fig. 1 is the schematic diagram of the zvzcs phase shifts Golden Bridge converter of series transductor and blocking capacitor.
Fig. 2 is the schematic diagram of ZVS phase-shifted full-bridge converters.
Fig. 3 is main oscillogram in half of switch periods of ZVS phase-shifted full-bridge converter master power switch pipes.
Fig. 4 is equivalent circuit in each period in half of switch periods of ZVS phase-shifted full-bridge converter master power switch pipes Figure.
Fig. 5 is main oscillogram in half of switch periods of zvzcs phase-shifted full-bridge converter master power switch pipes.
Fig. 6 is electrostatic precipitation high frequency electric source Ethernet networking diagram one.
Fig. 7 is electrostatic precipitation high frequency electric source Ethernet networking diagram two.
Embodiment
A kind of electrostatic precipitator high frequency electric source control system, it is included in progress on the basis of zvzcs phase-shifted full-bridge converters Improve, as shown in figure 1, more adapting to electrostatic precipitator high frequency electric source control system, ensure that the reliability of product, meanwhile, it is quiet Networking is communicated in electric cleaner high frequency electric source control system switching controller and is also in the 485 of original MODBUS communication protocols On mouth, it is difficult to meet that the increasingly flourishing information management control of present society requires that the present invention uses more advanced ether Netcom Agreement is interrogated, 10M transmission is supported, can preferably adapt to the demand of future development.

Claims (1)

1. a kind of electrostatic precipitator high frequency electric source control system, it is included on the basis of zvzcs phase-shifted full-bridge converters and is changed Enter, communicated as shown in figure 1, simultaneously, in electrostatic precipitator high frequency electric source control system switching controller networking be also in it is original On 485 mouthfuls of MODBUS communication protocols, the more advanced ethernet communication agreement of use, 10M transmission is supported.
CN201710576463.6A 2017-07-14 2017-07-14 A kind of electrostatic precipitator high frequency electric source control system Pending CN107395019A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109004843A (en) * 2018-09-06 2018-12-14 深圳市泰昂能源科技股份有限公司 A kind of voltage control method and device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005928A (en) * 2010-12-06 2011-04-06 山东大学 Photovoltaic high-frequency isolation boost soft switch DC/DC converter and control method thereof
CN102139244A (en) * 2011-02-16 2011-08-03 王红星 High frequency power supply for electric dust removal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005928A (en) * 2010-12-06 2011-04-06 山东大学 Photovoltaic high-frequency isolation boost soft switch DC/DC converter and control method thereof
CN102139244A (en) * 2011-02-16 2011-08-03 王红星 High frequency power supply for electric dust removal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109004843A (en) * 2018-09-06 2018-12-14 深圳市泰昂能源科技股份有限公司 A kind of voltage control method and device

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Effective date of registration: 20180718

Address after: 110000 332 Youth Street, Heping District, Shenyang, Liaoning 3-4-2

Applicant after: Bao Wenlong

Address before: 111300 211 group 3, twenty family village, Dahe Town, lighthouse City, Liaoning

Applicant before: Zhao Ping

RJ01 Rejection of invention patent application after publication
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Application publication date: 20171124