CN207994947U - A kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection - Google Patents
A kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection Download PDFInfo
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- CN207994947U CN207994947U CN201721903154.7U CN201721903154U CN207994947U CN 207994947 U CN207994947 U CN 207994947U CN 201721903154 U CN201721903154 U CN 201721903154U CN 207994947 U CN207994947 U CN 207994947U
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Abstract
The utility model discloses a kind of high-power dedusting power sources of permanent high-frequency and high-voltage of environmental protection, including switch unit, filter unit, high-frequency rectification unit, high-frequency inversion unit, high-frequency rectification transformer, body of deduster, IGBT driving units, detection unit, control unit and touch screen, the switch unit is connect with filter unit, the high-frequency rectification unit is connected with filter unit and high-frequency inversion unit, the high-frequency rectification transformer is connected with high-frequency inversion unit and body of deduster, and the high-frequency rectification transformer includes high frequency transformer, rectification silicon stack and current divider R1.The utility model can make the high-power dedusting power source reverse frequency of high-frequency and high-voltage constant, and power factor is more than 0.99, reduce grid side harmonic content, while spark discharge turn-off speed is fast.
Description
Technical field
The utility model is related to dedusting power source correlative technology field, the specially high-power dedustings of a kind of permanent high-frequency and high-voltage of environmental protection
Power supply.
Background technology
Attention with country to industrial production energy-saving and emission-reduction, the granular material discharged standard of industrial atmosphere is stringenter, electrostatic
The large-scale application of dedusting power source is in urgent need the promotion of environment protection treating equipment efficiency itself.Dedusting power source is removed as electrostatic
The core component of dirt device cannot have an impact power grid power quality while curbing environmental pollution, and it is electrical to influence other
The normal operation of equipment.Wherein high-frequency dust removing power supply since its is small, good dedusting effect and obtain large-scale application, it is existing big
Power high frequency dedusting power source is adjusted output voltage using mode of frequency regulation, and circuit topology is as shown in Figure 1, include filtered electrical
Feel L1, diode uncontrollable rectifier circuit 1, high-frequency inverter circuit 2 and 3, high-frequency rectification transformer 4 and 5.The diode uncontrollable rectifier
Circuit 1 is connected by filter inductance L1 with three phase network, and a DC bus-bar voltage is exported after filtered capacitance C2 filtering.It should
DC voltage inversion is high-frequency ac voltage by high-frequency inverter circuit 2, and high-frequency rectification transformation is added in by resonant capacitance C3
4 both ends of device form LCC resonance circuits using transformer leakage inductance L2 and parasitic capacitance, IGBT are made to be operated in Sofe Switch state, reduce
HF switch is lost.Above-mentioned inverter voltage is obtained by changing the boosting rectification of high-frequency rectification transformer 5 in the load of electric precipitation ontology
The secondary DC voltage waveform of one low ripple.Since busbar voltage is low, the primary side current of transformer of high-power high-frequency power supply is big
And be high frequency, transformer voltage ratio is big, IGBT device type selecting and transformer production complex process, and generally requiring two groups of circuit in parallel makes
With such as the high-frequency inverter circuit 3 and high-frequency rectification transformer 5 of Fig. 1.
Grid side uses diode uncontrollable rectifier mode, and one time DC voltage is uncontrollable, with mode of frequency regulation to output voltage
It is adjusted, there are following deficiencies：1, diode uncontrollable rectifier is carried out to network voltage, grid current harmonic content is big, Yi Zao
At power grid resonance；2, power factor is low, as place capacity increases, needs optional equipment reactive-load compensation equipment；3, busbar voltage
Low, the primary side current of transformer of only 530V, high-power high-frequency power supply are big and are high frequency, generally require two groups of high-frequency inversion electricity
Road limits the raising of high-frequency dust removing power；4, come in a manner of adjusting reverse frequency to secondary output DC voltage into
Row is adjusted, and for the bad working environments frequently discharged, high frequency transformer working frequency is far below design frequency, and rush of current becomes larger,
Transformer loss simultaneously increases.
Utility model content
The it is proposed of the utility model in view of the above problems has developed a kind of high-power Environmental-protecting dust-removing power supply of permanent high-frequency and high-voltage,
Under the premise of ensureing that power factor of electric network is more than 0.99, output voltage, inversion frequency are adjusted in a manner of adjusting primary voltage
Rate is constant, ensures that system stable operation in permanent high frequency state, reduces the power consumption and production difficulty of high frequency transformer, different operating modes are suitable
Answering property is good, while reducing grid side Harmonics of Input, avoids the influence to other electrical equipments in power grid.
To achieve the above object, the utility model provides the following technical solutions a kind of high-power dedusting of permanent high-frequency and high-voltage of environmental protection
Power supply, including switch unit, filter unit, high-frequency rectification unit, high-frequency inversion unit, high-frequency rectification transformer, deduster sheet
Body, IGBT driving units, detection unit, control unit and touch screen, the switch unit are connect with filter unit, the high frequency
Rectification unit is connected with filter unit and high-frequency inversion unit, the high-frequency rectification transformer and high-frequency inversion unit and deduster
Ontology is connected, and the high-frequency rectification transformer includes high frequency transformer, rectification silicon stack and current divider R1.
Preferably, the switch unit is composed in series by breaker and contactor, and three-phase alternating current is given by switch unit
Filter unit is powered.
Preferably, the filter unit is made of external inductance, filter capacitor, interior inductance.
Preferably, the high-frequency rectification unit is made of three-phase thyristor bridge rectification circuit and Support Capacitor, to power grid three
Phase alternating current pressure carries out high-frequency rectification, boosting.
Preferably, the high-frequency rectification unit by single-phase bridge inverter circuit and resonance capacitance group at reverse frequency is constant
Constant, preferably 20kHz constitutes LCC resonance circuits with leakage inductance and the distribution capacity of high-frequency rectification transformer, and IGBT is operated in soft open
Off status.
Preferably, the detection unit includes：Three-phase alternating voltage/alternating current detection circuit, DC voltage/mono-
Secondary alternating current detection circuit, secondary DC voltage/D.C. current detecting circuit, IGBT temperature/temperature of oil in transformer/environment temperature
The detection of detection circuit, wherein three-phase alternating voltage/alternating current, a DC voltage/time alternating current is based on Hall
Effect realizes isolation sampling.
Preferably, described control unit includes AD samplings, pwm signal output, communication interface, storage unit, faulty hardware
Protect circuit.
Preferably, for described control unit using double-nuclear DSP chip TMS320F28374D as core, No.1 CPU is whole to high frequency
It flows unit and carries out closed-loop control, so that high-frequency rectification unit is exported one and stablize adjustable DC voltage；No. two CPU are to high-frequency inversion
Unit carries out closed-loop control, and reverse frequency is constant, and the value for reading detection unit is sampled by high-speed AD, quickly judges that ontology is
No flashing electric discharge, pwm pulse output is blocked rapidly when detecting that spark occurs, realizes rapidly switching off for spark.
Compared with prior art, the utility model has the beneficial effects that：The high-power dedusting power source of environmental protection perseverance high-frequency and high-voltage
Power grid input power factor is improved, power grid Harmonics of Input content is reduced；High-frequency rectification transformer greatly improved
Primary side input voltage reduces the turn ratio of transformer, primary side input current is reduced under same output capacity, reduces high frequency low voltage
The production difficulty of winding, while also improving the efficiency of transmission of transformer.It is adjusted by adjusting primary voltage rather than reverse frequency
Section output voltage, transformer operating frequency constant, power supply adaptability for working condition are good.
Description of the drawings
Fig. 1 is the functional block diagram of frequency modulation type high-frequency high-power dedusting power source；
Fig. 2 is the functional block diagram of the high-power dedusting power source of environmentally friendly permanent high-frequency and high-voltage；
Fig. 3 is the high-power dedusting power source electrical schematic diagram of environmentally friendly permanent high-frequency and high-voltage；
Fig. 4 is the high-power dedusting power source control unit structure diagram of environmentally friendly permanent high-frequency and high-voltage；
Fig. 5 is that the environmentally friendly permanent high-power dedusting power source output current of high-frequency and high-voltage adjusts comparison diagram；
In figure：1, switch unit, 2, filter unit, 3, high-frequency rectification unit, 4, high-frequency inversion unit, 5, high-frequency rectification becomes
Depressor, 6, body of deduster, 7, IGBT driving units, 8, detection unit, 9, control unit, 10, touch screen.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
- 5 are please referred to Fig.1, the utility model provides a kind of technical solution：A kind of high-power dedusting electricity of the permanent high-frequency and high-voltage of environmental protection
Source, including switch unit 1, filter unit 2, high-frequency rectification unit 3, high-frequency inversion unit 4, high-frequency rectification transformer 5, dedusting
Device ontology 6, IGBT driving units 7, detection unit 8, control unit 9 and touch screen 10, switch unit 1 is by breaker and contactor
It is composed in series, three-phase alternating current gives filter unit 2 to power by switch unit, and filter unit 2 is by external inductance, filter capacitor, interior
Inductance is constituted, and is filtered out to the switching harmonics of the generation of high-frequency rectification unit 3, high-frequency rectification unit 3 is by three-phase thyristor bridge
Rectification circuit and Support Capacitor are constituted, and carry out high-frequency rectification, boosting to power grid three-phase alternating voltage, control unit 9 passes through IGBT
Driving unit 7 controls the switching time of the IGBT of high-frequency rectification unit 3 with duty ratio is opened, and grid ac voltage is whole
It is set to direct current and boosts, while realizing the adjusting of power grid input power factor, high-frequency rectification unit 3 is by single-phase bridge inverter circuit
With resonance capacitance group at reverse frequency is invariable, preferably 20kHz, leakage inductance and distribution capacity structure with high-frequency rectification transformer
At LCC resonance circuits, IGBT is operated in Sofe Switch state, the direct current that single-phase bridge inverter circuit obtains high-frequency rectification unit 3
Voltage inversion is the rectangular-wave alternating-current voltage of constant frequency, and rectangular-wave alternating-current voltage is added in the equivalent leakage of resonant capacitance C3, transformer
Feel on L3 and transformer equivalent parasitic capacitances C4, generate resonance current, when resonance current zero passage turns off IGBT, in addition, high frequency is whole
Convertor transformer is made of high frequency transformer and rectification silicon stack, and original edge voltage obtains after the boosting of high-frequency rectification transformer and rectification
To the high-voltage dc voltage needed for dedusting ontology, detection unit 8 includes：Three-phase alternating voltage/alternating current detection circuit, once
A DC voltage/time alternating current detection circuit, secondary DC voltage/D.C. current detecting circuit, IGBT temperature/transformer
The inspection of oil temperature/ambient temperature detection circuit, wherein three-phase alternating voltage/alternating current, DC voltage/time alternating current
Survey is based on Hall effect and realizes that isolation sampling, control unit 9 are single including AD samplings, pwm signal output, communication interface, storage
Member, faulty hardware protect circuit, and for control unit 9 using double-nuclear DSP chip TMS320F28374D as core, No.1 CPU is whole to high frequency
It flows unit 3 and carries out closed-loop control, so that high-frequency rectification unit 3 is exported one and stablize adjustable DC voltage；No. two CPU are inverse to high frequency
Become unit 4 and carry out closed-loop control, reverse frequency is constant, and the value for reading detection unit is sampled by high-speed AD, quickly judges ontology
Whether flashing discharges, and blocks pwm pulse output rapidly when detecting that spark occurs, realizes rapidly switching off for spark, controls
The course of work of unit 9 processed is as follows：Control unit 9 using TMS320F28374D double-nuclear DSPs as master devices, including AD sampling,
The parts such as communication interface, pwm signal output, fault detect and hardware protection, 6 tunnels of No. 1 CPU control high-frequency rectifications unit 3
Pwm signal exports, and judges the voltage value at this time needed for body of deduster 6, by adjust this 6 road PWM signal open the moment with
Duty ratio adjusts a DC voltage of the output of high-frequency rectification unit 3, and then realizes adjusting to secondary DC voltage, simultaneously
The phase angle for controlling power network current and network voltage makes system be operated in pure active state, No. 2 CPU control high-frequency inversions units 4
4 road pwm signals outputs, the switch of 2 IGBT modules is controlled by driving unit 7, it is inverse that a DC voltage is carried out high frequency
Become, reverse frequency is invariable, preferably 20kHz, and inverter voltage is by resonant capacitance C2, the equivalent leakage inductance L2 of high frequency transformer, height
Frequency power transformer equivalent parasitic voltage C3 is connected on high-frequency rectification transformer primary side, generates resonance current, controls the shutdown moment of IGBT,
IGBT is set to be operated in Sofe Switch state, No. 2 CPU high speeds read AD sampled signals, quickly detect secondary voltage and secondary current letter
Number, flashing blocks 4 driving pulse of high-frequency inversion unit immediately when discharging, realize that spark discharge is quickly protected, control unit 9
To three-phase alternating voltage, a DC voltage, secondary DC voltage, three-phase alternating current, a resonance current, secondary current,
IGBT temperature, temperature of oil in transformer etc. are detected, and are sent into DSP through AD conversion, are participated in closed-loop control.
Operation principle：Switch unit 1 is made of breaker and contactor, after switch is closed, by power grid three-phase alternating voltage
It send to filter unit 2, high-frequency rectification unit 3 is connected with filter unit 2 and high-frequency inversion unit 4, high-frequency rectification transformer 5 and height
Frequency inversion unit 4 and body of deduster 6 are connected, and high-frequency rectification transformer 5 includes high frequency transformer, rectification silicon stack, current divider R1,
The contactor of main switch unit 1 after connecting power grid, is connected major loop, DSP is by controlling three-phase bridge by divider resistance R2 and R3
Opening for 6 IGBT of all controlled rectifier circuit and opens duty ratio at the moment, carries out rectification to grid ac voltage and boosts, and is right
The phase of power grid input current and network voltage is controlled, and so that equipment is operated in pure active state, DSP is by controlling single-phase bridge
The constant frequency of 4 IGBT is open-minded in formula inverter circuit, and the DC voltage constant frequency inversion that high-frequency rectification unit 3 is obtained is height
Frequency alternating voltage, high-frequency ac voltage are added in resonant capacitance C3, on transformer equivalent leakage inductance L3 and integrated capacitance C4, keep inversion electric
The existing resonance of outflow, when inverter circuit returns to zero, DSP controls the shutdown of IGBT, realizes that the Sofe Switch of IGBT, alternating voltage pass through
High direct voltage is obtained after the boosting rectification of high-frequency rectification transformer 5, is powered to electrostatic precipitation ontology；The control process of control unit 9
It summarizes：Control unit 9 is using double-nuclear DSP chip TMS320F28374D as main control unit, including AD samplings, communication interface, PWM letters
Parts, No. 1 CPU such as number output, fault detect and hardware protection carry out closed-loop control to 6 road PWM of high-frequency rectification unit 3, lead to
AD samplings are crossed, determine the current operating mode of equipment, so that high-frequency rectification unit 3 is exported a stable DC voltage, passes through adjusting
The amplitude of DC voltage, the secondary current frequency that high-frequency rectification transformer 5 exports is constant, realizes the tune to secondary output
Section, No. 2 CPU control 4 road PWM of high-frequency inversion unit, and high-speed sampling secondary voltage and secondary current are quickly dodged
Network judges.
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art is come
Say, still can with technical scheme described in the above embodiments is modified, or to which part technical characteristic into
Row equivalent replacement, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all
It is included within the scope of protection of this utility model.
Claims (8)
1. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection, including switch unit (1), filter unit (2), high-frequency rectification list
First (3), high-frequency inversion unit (4), high-frequency rectification transformer (5), body of deduster (6), IGBT driving units (7), detection are single
First (8), control unit (9) and touch screen (10), it is characterised in that：The switch unit (1) connect with filter unit (2), institute
It states high-frequency rectification unit (3) with filter unit (2) and high-frequency inversion unit (4) to be connected, the high-frequency rectification transformer (5) and height
Frequency inversion unit (4) and body of deduster (6) are connected, and the high-frequency rectification transformer (5) includes high frequency transformer, rectification silicon stack
With current divider R1.
2. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection according to claim 1, it is characterised in that：The switch
Unit (1) is composed in series by breaker and contactor, and three-phase alternating current is powered by switch unit to filter unit (2).
3. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection according to claim 1, it is characterised in that：The filtering
Unit (2) is made of external inductance, filter capacitor, interior inductance.
4. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection according to claim 1, it is characterised in that：The high frequency
Rectification unit (3) is made of three-phase thyristor bridge rectification circuit and Support Capacitor, and it is whole to carry out high frequency to power grid three-phase alternating voltage
Stream, boosting.
5. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection according to claim 1, it is characterised in that：The high frequency
Rectification unit (3) is by single-phase bridge inverter circuit and resonance capacitance group at reverse frequency is invariable, preferably 20kHz, with high frequency
The leakage inductance of rectifier transformer constitutes LCC resonance circuits with distribution capacity, and IGBT is operated in Sofe Switch state.
6. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection according to claim 1, it is characterised in that：The detection
Unit (8) includes：Three-phase alternating voltage/alternating current detection circuit, a DC voltage/time alternating current detection circuit,
Secondary DC voltage/D.C. current detecting circuit, IGBT temperature/temperature of oil in transformer/ambient temperature detection circuit, wherein three intersections
The detection of galvanic electricity pressure/alternating current, a DC voltage/time alternating current is based on Hall effect and realizes isolation sampling.
7. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection according to claim 1, it is characterised in that：The control
Unit (9) includes AD samplings, pwm signal output, communication interface, storage unit, faulty hardware protection circuit.
8. a kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection according to claim 1, it is characterised in that：The control
For unit (9) using double-nuclear DSP chip TMS320F28374D as core, No.1 CPU carries out closed-loop control to high-frequency rectification unit, makes
High-frequency rectification unit exports one and stablizes adjustable DC voltage；No. two CPU carry out closed-loop control, inversion to high-frequency inversion unit
Frequency-invariant samples the value for reading detection unit by high-speed AD, quickly judge ontology whether flashing electric discharge, when detecting
Spark blocks rapidly pwm pulse output when occurring, realize rapidly switching off for spark.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721903154.7U CN207994947U (en) | 2017-12-29 | 2017-12-29 | A kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection |
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| CN201721903154.7U CN207994947U (en) | 2017-12-29 | 2017-12-29 | A kind of high-power dedusting power source of permanent high-frequency and high-voltage of environmental protection |
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| CN207994947U true CN207994947U (en) | 2018-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111443288A (en) * | 2020-04-27 | 2020-07-24 | 山东沃森电源设备有限公司 | Low-cost new energy automobile motor test power supply |
-
2017
- 2017-12-29 CN CN201721903154.7U patent/CN207994947U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111443288A (en) * | 2020-04-27 | 2020-07-24 | 山东沃森电源设备有限公司 | Low-cost new energy automobile motor test power supply |
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