CN102946186A - Active harmonic suppressing mechanism - Google Patents
Active harmonic suppressing mechanism Download PDFInfo
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- CN102946186A CN102946186A CN2012104373755A CN201210437375A CN102946186A CN 102946186 A CN102946186 A CN 102946186A CN 2012104373755 A CN2012104373755 A CN 2012104373755A CN 201210437375 A CN201210437375 A CN 201210437375A CN 102946186 A CN102946186 A CN 102946186A
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Abstract
The invention provides an active harmonic suppressing mechanism, and relates to the technical field of harmonic suppression. The active harmonic suppressing mechanism is characterized by comprising a rectifying circuit, a boost inductor, a switch control circuit, a freewheel diode, a voltage stabilization capacitor, an overvoltage/overcurrent protection circuit and a signal power supply circuit; the alternating current is conducted with an input end of the rectifying circuit; an output end of the rectifying circuit is sequentially conducted with the boost inductor, the freewheel diode and the voltage stabilization capacitor and forms a main loop with the boost inductor, the freewheel diode and the voltage stabilization capacitor; the switch control circuit and the overvoltage/overcurrent protection circuit are integrated in a power factor correction controller; the switch control circuit controls on or off of a switch tube of the power factor correction controller; the power factor correction controller is conducted with the main loop, performs voltage sampling on the output end of the rectifying circuit, and performs voltage and current sampling on the voltage stabilization capacitor; and the signal power supply circuit is respectively conducted with the boost inductor of the main loop and the power factor correction controller. The active harmonic suppressing mechanism is suitable for harmonic suppression of small and medium power electronic equipment.
Description
Technical field
The present invention relates to harmonic wave and suppress technical field, is that a kind of active harmonics suppresses mechanism.
Background technology
Along with the development of science and technology, electronic equipment has been widely used in every field, and more and more stricter to the requirement of its power consumption.In order to obtain step voltage before the stable direct current, ac-dc converter circuit in the power module mostly adopts the diode bridge rectification to connect the circuit of large capacity filtering at present, along with this class application of installation is more and more extensive, also more and more serious to the harmonic pollution of electrical network in recent years.Yet for a long time, people just pay attention to the raising of output performance, pay little attention to for input side harmonic pollution problem, in order to obtain level power supply before the stable direct current, choosing of capacitance is bigger than normal, so that input current abnormality is serious, brings huge harmonic pollution to electrical network.Simultaneously, the high order harmonic component that produces in power-supply device is transferred to other parts of system or other devices by power line or additional common wire, can cause the faulty operation of electronic equipment, thereby greatly reduce operating reliability and the stability of electronic equipment.Therefore must suppress the harmonic wave that produces in the power circuit, yet normally used passive power factor antidote efficient is lower, the sphere of action of passive low ventilating filter also be difficult to current waveform distortion that rectification circuit is caused and also other Switching Power Supply frequency of KHz level bring into play good effect, solve the problems referred to above so must propose a kind of active harmonics filter.
Summary of the invention
The purpose of this invention is to provide a kind of active harmonics and suppress mechanism, the harmonic wave that is applicable to the middle low power electronic equipment suppresses, particularly the harmonic wave for CE101 test frequency range among GJB151-97A carries out establishment, simultaneously the little requirement of output voltage fluctuation after the satisfied arrangement filtering.
Technical scheme of the present invention is that a kind of active harmonics suppresses mechanism, it is based on the BOOST topology, adopt the average current type current control method, use simultaneously power factor correction controller, it is characterized in that: it comprises rectification circuit, boost inductance, ON-OFF control circuit, fly-wheel diode, electric capacity of voltage regulation, overvoltage/current foldback circuit and signal power source circuit; The input conducting of alternating current and rectification circuit, the output of rectification circuit are successively with boost inductance, fly-wheel diode and electric capacity of voltage regulation conducting and consist of major loop; Power factor correction controller inside is integrated with ON-OFF control circuit and overvoltage/current foldback circuit, closure and the disconnection of the switching tube of ON-OFF control circuit power ratio control factor correcting controller; Power factor correction controller and major loop conducting, and carry out voltage sample at rectification circuit output end, carry out voltage and current sample at the electric capacity of voltage regulation place; The signal power source circuit respectively with boost inductance and the power factor correction controller conducting of major loop.
Described rectification circuit is the bridge rectifier that is made of four rectifier diode combination conductings.
Described ON-OFF control circuit is by voltage sample and the conducting of multiplication comparison operation device, by closure and the disconnection of the switching tube of CMOS tube grid power ratio control factor correcting controller.
The comparative result of described overvoltage/current foldback circuit Real Time Monitoring main circuit current value and branch pressure voltage and reference voltage, when any condition was above standard, overvoltage/current foldback circuit can both quit work by control circuit.
Described signal power source circuit is the wire harness that adopts transformer principle coiling on boost inductance; through RC delay circuit charge initiation ON-OFF control circuit, and can be converted to by " electric energy--magnetic energy-electric energy " the Vcc operating voltage of ON-OFF control circuit and overvoltage/current foldback circuit.
The working frequency range of this active harmonics restraining device is 30KHz to 150KHz.
Characteristics of the present invention are to use ON-OFF control circuit, the switching frequency of Simultaneous Switching control circuit is much larger than power frequency, for passive PFC circuit, this active harmonics restraining device can accomplish that volume is little, lightweight, power factor value is higher, THD is low, input voltage range is wide, and output voltage also can be controlled and be kept constant.
Description of drawings
The present invention is further illustrated below in conjunction with embodiment:
Fig. 1 is current rectifying and wave filtering circuit and the Equivalent Harmonic voltage source schematic diagram when not adopting the APFC technology;
Fig. 2 is the circuit diagram of active harmonics restraining device;
Fig. 3 is under the active harmonics restraining device operating state, the waveform schematic diagram of current continuity conduction mode Average Current Control Method.
Among the figure: 1, rectification circuit; 2, boost inductance; 3, ON-OFF control circuit; 4, fly-wheel diode; 5, electric capacity of voltage regulation; 6, overvoltage/current foldback circuit; 7, signal power source circuit.
Embodiment
As shown in Figure 1, in current rectifying and wave filtering circuit when not adopting the APFC technology and the Equivalent Harmonic voltage source, in order to obtain step voltage before the stable direct current, the ac-dc converter circuit in the power module mostly adopts the diode bridge rectification to connect the circuit of large capacity filtering at present.Yet for a long time, people just pay attention to the raising of output performance, pay little attention to for input side harmonic pollution problem, in order to obtain level power supply before the stable direct current, choosing of capacitance is bigger than normal, so that input current abnormality is serious, brings huge harmonic pollution to electrical network.
Simultaneously, passive power factor antidote efficient is lower, the sphere of action of passive low ventilating filter also be difficult to current waveform distortion that rectification circuit is caused and also other Switching Power Supply frequency of KHz level bring into play good effect.
As shown in Figure 2, a kind of active harmonics suppresses mechanism, and it adopts average current type current control method and APFC technology based on the BOOST topology, realizes with power factor correction controller simultaneously.
It comprises rectification circuit 1, boost inductance 2, ON-OFF control circuit 3, fly-wheel diode 4, electric capacity of voltage regulation 5, overvoltage/current foldback circuit 6 and signal power source circuit 7.
Wherein, rectification circuit 1 is the bridge rectifier that is made of four rectifier diode combination conductings.
The input of rectification circuit 1 directly and the alternating current conducting, the output of rectification circuit 1 is successively with boost inductance 2, fly-wheel diode 4 and electric capacity of voltage regulation 5 conductings and consist of major loop.
Power factor correction controller inner integrated ON-OFF control circuit 3 and overvoltage/current foldback circuit 6.
ON-OFF control circuit 3 is by voltage sample and the conducting of multiplication comparison operation device, by closure and the disconnection of the switching tube of CMOS tube grid driving voltage power ratio control factor correcting controller.
Power factor correction controller and major loop conducting, and carry out voltage sample at rectification circuit 1 output, 5 places carry out voltage and current sample at electric capacity of voltage regulation.
The comparative result of overvoltage/current foldback circuit 6 Real Time Monitoring main circuit current values and branch pressure voltage and reference voltage, when any condition was above standard, overvoltage/current foldback circuit 6 can both quit work by control circuit.
Signal power source circuit 7 adopts the wire harness of transformer principle coiling on boost inductance 2, through RC delay circuit and power factor correction controller conducting.
Signal power source circuit 7 is through RC delay circuit charge initiation ON-OFF control circuit 3, and can be converted to by " electric energy--magnetic energy-electric energy " the Vcc operating voltage of ON-OFF control circuit 3 and overvoltage/current foldback circuit 6.
Electric capacity of voltage regulation 5 plays burning voltage and electric current afterflow effect after switching tube disconnects.
Fly-wheel diode 4 guarantees that current direction is normal when the boost inductance terminal voltage is higher than the electric capacity of voltage regulation end, and when the boost inductance terminal voltage was lower than the electric capacity of voltage regulation end, diode reverse cut-off resistance reverse current formed.
The working frequency range of this active harmonics restraining device is 30KHz to 150KHz.
During work, industrial-frequency alternating current is through rectification circuit 1 rectification, electric current enters boost inductance 2 energy storage and passes through fly-wheel diode 4 to electric capacity of voltage regulation 5 chargings and enter load, synchronous signal power circuit 7 is by the RC circuit starting switch control circuit first time 3, and waveform is sampled after 3 pairs of rectifications of ON-OFF control circuit.
ON-OFF control circuit 3 control switch pipes are closed when sampled voltage surpasses instantaneous reference voltage, and boost inductance 2 rear end major loops are opened circuit, and electric capacity of voltage regulation 5 does not produce reverse current for load afterflow while fly-wheel diode 4 guarantees electric capacity of voltage regulation 5 to the switching tube drain electrode.
ON-OFF control circuit 3 control switch pipes disconnect when sampled voltage is lower than instantaneous reference voltage, boost inductance 2 rear ends and major loop are connected, fly-wheel diode 4 conducting boost inductances 2 discharge the energy storage of upper stage, electric capacity of voltage regulation 5 chargings, guarantee repeatedly that successively active harmonic suppression apparatus exports a burning voltage, input current waveform is followed voltage waveform simultaneously, as shown in Figure 3.
Signal power source circuit 7 is not cutoff power factor correction controller by transformer principle power supply is provided in this process; and the magnitude of voltage that overvoltage/current foldback circuit 6 real time monitoring output voltage partial pressure value and main circuit current value produce at sampling resistor, assurance device is working properly.
The parts that present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not one by one narration.
Claims (6)
1. an active harmonics suppresses mechanism, it is based on the BOOST topology, adopt the average current type current control method, use simultaneously power factor correction controller, it is characterized in that: it comprises rectification circuit (1), boost inductance (2), ON-OFF control circuit (3), fly-wheel diode (4), electric capacity of voltage regulation (5), overvoltage/current foldback circuit (6) and signal power source circuit (7); The input conducting of alternating current and rectification circuit (1), the output of rectification circuit (1) are successively with boost inductance (2), fly-wheel diode (4) and electric capacity of voltage regulation (5) conducting and consist of major loop; Power factor correction controller inside is integrated with ON-OFF control circuit (3) and overvoltage/current foldback circuit (6), closure and the disconnection of the switching tube of ON-OFF control circuit (3) power ratio control factor correcting controller; Power factor correction controller and major loop conducting, and carry out voltage sample at rectification circuit (1) output, locate to carry out voltage and current sample at electric capacity of voltage regulation (5); Signal power source circuit (7) respectively with boost inductance (2) and the power factor correction controller conducting of major loop.
2. a kind of active harmonics described in according to claim 1 suppresses mechanism, it is characterized in that: described rectification circuit (1) is the bridge rectifier that is made of four rectifier diodes combination conductings.
3. a kind of active harmonics described in according to claim 1 suppresses mechanism, it is characterized in that: described ON-OFF control circuit (3) is by voltage sample and the conducting of multiplication comparison operation device, by closure and the disconnection of the switching tube of CMOS tube grid power ratio control factor correcting controller.
4. a kind of active harmonics described in according to claim 1 suppresses mechanism; it is characterized in that: the comparative result of described overvoltage/current foldback circuit (6) Real Time Monitoring main circuit current value and branch pressure voltage and reference voltage; when any condition was above standard, overvoltage/current foldback circuit (6) can both quit work by control circuit.
5. a kind of active harmonics described in according to claim 1 suppresses mechanism; it is characterized in that: described signal power source circuit (7) is the wire harness that adopts transformer principle coiling on boost inductance; through RC delay circuit charge initiation ON-OFF control circuit, and can be converted to by " electric energy--magnetic energy-electric energy " the Vcc operating voltage of ON-OFF control circuit (3) and overvoltage/current foldback circuit (6).
6. a kind of active harmonics described in according to claim 1 suppresses mechanism, and it is characterized in that: the working frequency range of this active harmonics restraining device is 30KHz to 150KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104373755A CN102946186A (en) | 2012-11-06 | 2012-11-06 | Active harmonic suppressing mechanism |
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| CN2012104373755A CN102946186A (en) | 2012-11-06 | 2012-11-06 | Active harmonic suppressing mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218530A (en) * | 2013-05-31 | 2014-12-17 | 浙江三花股份有限公司 | Hardware protection circuit for active PFC (power factor correction) |
| CN106610586A (en) * | 2016-12-08 | 2017-05-03 | 北京航空航天大学 | Magnetic suspension rotor harmonic current inhibition method based on parallel FORC and phase lag-lead compensation |
| CN109510458A (en) * | 2017-09-12 | 2019-03-22 | 株洲中车时代电气股份有限公司 | Boost filter |
| CN111999542A (en) * | 2019-05-08 | 2020-11-27 | 上海海立电器有限公司 | Method for debugging harmonic current |
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| CN202918185U (en) * | 2012-11-06 | 2013-05-01 | 西安开容电子技术有限责任公司 | Active harmonic suppression device |
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| WO2003017453A1 (en) * | 2001-08-16 | 2003-02-27 | Green Power Technologies Ltd. | Pfc apparatus for a converter operating in the borderline conduction mode |
| CN101754550A (en) * | 2008-12-12 | 2010-06-23 | 上海电机学院 | Centralized electricity-saving lamp power source |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218530A (en) * | 2013-05-31 | 2014-12-17 | 浙江三花股份有限公司 | Hardware protection circuit for active PFC (power factor correction) |
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| CN106610586A (en) * | 2016-12-08 | 2017-05-03 | 北京航空航天大学 | Magnetic suspension rotor harmonic current inhibition method based on parallel FORC and phase lag-lead compensation |
| CN106610586B (en) * | 2016-12-08 | 2019-10-22 | 北京航空航天大学 | It is a kind of based on parallel FORC and delayed phase-lead compensation magnetic suspension rotor method for inhibiting harmonic current |
| CN109510458A (en) * | 2017-09-12 | 2019-03-22 | 株洲中车时代电气股份有限公司 | Boost filter |
| CN111999542A (en) * | 2019-05-08 | 2020-11-27 | 上海海立电器有限公司 | Method for debugging harmonic current |
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Application publication date: 20130227 |