CN103812366B - Three-phase controlled rectifier circuit - Google Patents
Three-phase controlled rectifier circuit Download PDFInfo
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- CN103812366B CN103812366B CN201210445225.9A CN201210445225A CN103812366B CN 103812366 B CN103812366 B CN 103812366B CN 201210445225 A CN201210445225 A CN 201210445225A CN 103812366 B CN103812366 B CN 103812366B
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- 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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Abstract
The present invention provides a kind of three-phase controlled rectifier circuit, including three-phase alternating current power network, filter circuit, rectification circuit and correcting circuit；The three-phase alternating current power network, for being powered for whole three-phase controlled rectifier circuit, including three live wires；The filter circuit, is connected with the three-phase alternating current power network, the alternating current for filtering the three-phase alternating current power network output, including three filter inductances；The rectification circuit, is connected with the filter circuit, and the alternating current for being inputted by filter circuit is converted into direct current, including diode rectifier bridge, electrochemical capacitor and steady resistance；The correcting circuit, is connected with the filter circuit and rectification circuit, for correcting net side power factor, including three two-way gate-controlled switches and three ac capacitors.Three-phase controlled rectifier circuit of the present invention is simple in construction, control is easy, can improve net side power factor, suppresses harmonic current.
Description
Technical field
The invention belongs to electric and electronic technical field, it is related to a kind of rectification circuit, more particularly to a kind of three-phase is controllable whole
Current circuit.
Background technology
For the converters of three-phase alternating-current powered, such as the domestic variable frequency air-conditioning of relatively high power, prime is three
Commutating phase device, rear class is inverter circuit, and inverter is followed by compressor, in the AC of whole system, can be produced very serious
Harmonic current problem, including low-order harmonic electric current and higher harmonic current, the electromagnetic environment of pollution periphery and power network, seriously
When can cause many harm, need to use current harmonics elimination technology for this.
At present, the current harmonics elimination technology of three phase supply commutation system can be using the complete active skill worked well
Art, passes through the control technology of active, it is possible to achieve higher even 1 net side power factor, although circuit is simple, but design
It is not easy to, the construction cycle is longer, it is less efficient, also provide no advantage against, be not yet widely used in terms of cost.
The current harmonics elimination technology of three phase supply commutation system can pass through design using the poor passive techniques of effect
Rational circuit structure and the rational parameter of configuration, can also realize net side power factor higher or even close to 1, and circuit
Simply, design easy, the construction cycle is shorter, is widely used, but there is the practical problems such as volume is larger, heavy,
And the cost of passive device also Satisfactory Control.
Therefore need a kind of new rectifier technology badly in application fields such as convertible frequency air-conditioners, preferably merge it is active with it is passive
The advantage of commutation technique, and overcome its weak point as far as possible.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of three-phase controlled rectifier circuit,
For solving the problem of active technique in the prior art finds serious harmonic current, power factor is low.
In order to achieve the above objects and other related objects, the present invention provides a kind of three-phase controlled rectifier circuit.The three-phase
Controlled rectification circuit includes：Three-phase alternating current power network, filter circuit, rectification circuit and correcting circuit；
The three-phase alternating current power network, for being powered for whole three-phase controlled rectifier circuit；Including the first live wire, the second fire
Line, the 3rd live wire.
The filter circuit, is connected with the three-phase alternating current power network, the friendship for filtering the three-phase alternating current power network output
Stream electricity；Including the first filter inductance, the second filter inductance and the 3rd filter inductance；
The rectification circuit, is connected with the filter circuit, and the alternating current for being inputted by filter circuit is converted into direct current
Electricity；Including diode rectifier bridge, electrochemical capacitor and steady resistance, the diode rectifier bridge has the first bridge arm, the second bridge
Arm, the 3rd bridge arm；
The correcting circuit, is connected with the filter circuit and rectification circuit, for correcting net side power factor；Including
One two-way gate-controlled switch, the second two-way gate-controlled switch, the 3rd two-way gate-controlled switch, the first ac capacitor, the second ac capacitor, with
And the 3rd ac capacitor.
Preferably, one end of the first filter inductance and the first live wire in the three-phase alternating current power network in the filter circuit
It is connected, the other end of the first filter inductance is connected with the first input end of the diode rectifier bridge in the rectification circuit；Second
One end of filter inductance is connected with the second live wire in the three-phase alternating current power network, the other end of the second filter inductance with it is described whole
Second input of the diode rectifier bridge in current circuit is connected；In one end of 3rd filter inductance and the three-phase alternating current power network
The second live wire be connected, the 3rd input of the other end of the 3rd filter inductance and the diode rectifier bridge in the rectification circuit
It is connected.
Preferably, first, second, third input of the diode rectifier bridge be diode rectifier bridge first, second,
The midpoint of 3rd bridge arm.
Preferably, in the rectification circuit electrochemical capacitor and steady resistance is in parallel.
Preferably, the positive pole of the diode rectifier bridge is connected with the positive pole of electrochemical capacitor, forms output cathode, described two
The negative pole of pole pipe rectifier bridge is connected with the negative pole of electrochemical capacitor, forms output negative pole.
Preferably, it is the first of one end of the first two-way gate-controlled switch and the diode rectifier bridge defeated in the correcting circuit
Enter end to be connected, the other end of the first two-way gate-controlled switch is connected with one end of the first ac capacitor, the first ac capacitor
The other end is connected with the negative pole of the electrochemical capacitor.
Preferably, it is the second of one end of the second two-way gate-controlled switch and the diode rectifier bridge defeated in the correcting circuit
Enter end to be connected, the other end of the second two-way gate-controlled switch is connected with one end of the second ac capacitor, the second ac capacitor
The other end is connected with the negative pole of the electrochemical capacitor.
Preferably, it is the 3rd of one end of the 3rd two-way gate-controlled switch and the diode rectifier bridge the defeated in the correcting circuit
Enter end to be connected, the other end of the 3rd two-way gate-controlled switch is connected with one end of the 3rd ac capacitor, the 3rd ac capacitor
The other end is connected with the negative pole of the electrochemical capacitor.
As described above, three-phase controlled rectifier circuit of the present invention, has the advantages that：
1st, suppress harmonic current, improve net side power factor, DC voltage and raised and steadily；
2nd, circuit structure is simple, design is easy, control is easy, more efficient
Brief description of the drawings
Fig. 1 is shown as the circuit diagram of the three-phase controlled rectifier circuit of the present invention.
Fig. 2 is shown as the circuit diagram of the application circuit of the three-phase controlled rectifier circuit of the present invention.
Component label instructions
1 three-phase alternating current power network
2 filter circuits
3 rectification circuits
4 correcting circuits
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Refer to accompanying drawing.It should be noted that the diagram provided in the present embodiment only illustrates the present invention in a schematic way
Basic conception, then in schema only display with relevant component in the present invention rather than according to component count during actual implement, shape
Shape and size are drawn, and kenel, quantity and the ratio of each component can be during its actual implementation
A kind of random change, and its assembly layout kenel may also be increasingly complex.
With reference to embodiment and accompanying drawing, the present invention is described in detail.
Embodiment one
The present embodiment provides a kind of three-phase controlled rectifier circuit, as shown in figure 1, the three-phase controlled rectifier circuit includes：
Three-phase alternating current power network 1, filter circuit 2, rectification circuit 3 and correcting circuit 4.The three-phase alternating current power network 1 includes the first live wire
Ua, the second live wire Ub, the 3rd live wire Uc.The filter circuit includes three filter inductances, i.e. the first filter inductance L1, the second filter
Ripple inductance L2 and the 3rd filter inductance L3.The rectification circuit 3 includes, diode rectifier bridge B1, electrochemical capacitor E1 and steady
Determining resistance R1, the diode rectifier bridge B1 has three bridge arms, i.e. the first bridge arm, the second bridge arm, the 3rd bridge arm.The correction
Circuit 4 includes the first two-way gate-controlled switch BDS1, the second two-way gate-controlled switch BDS2, the 3rd two-way gate-controlled switch BDS3, first
Ac capacitor C1, the second ac capacitor C2, the 3rd ac capacitor C3.
Wherein, the three-phase alternating current power network 1 is used to power for whole three-phase controlled rectifier circuit.
The filter circuit 2, is connected with the three-phase alternating current power network, the friendship for filtering the three-phase alternating current power network output
Stream electricity, wherein, the first filter inductance L1 one end is connected with the first live wire Ua in the three-phase alternating current power network 1, the first filtering
And diode the inductance L1 other end is connected with the first input end N1 of the diode rectifier bridge B1 in the rectification circuit 3, i.e.,
Rectifier bridge B1 the first bridge arm midpoint is connected；Second filter inductance L2 one end and the second fire in the three-phase alternating current power network 1
Line Ub is connected, the second input of the second filter inductance L2 other end and the diode rectifier bridge B1 in the rectification circuit 3
N2 is connected, i.e., be connected with diode rectifier bridge B1 the second bridge arm midpoint；Intersect with described three 3rd filter inductance L3 one end
The the second live wire Uc flowed in power network 1 is connected, the 3rd filter inductance L3 other end and the diode rectification in the rectification circuit 3
Bridge B1 the 3rd input N3 is connected, i.e., be connected with diode rectifier bridge B1 the 3rd bridge arm midpoint.
The rectification circuit 3, is connected, the alternating current for being inputted by filter circuit is converted into directly with the filter circuit 2
Stream electricity, wherein, electrochemical capacitor E1 and steady resistance R1 are in parallel.The positive pole and electrochemical capacitor E1 of the diode rectifier bridge B1 is just
Extremely it is connected, forms output cathode DCP, the negative pole of the diode rectifier bridge B1 is connected with electrochemical capacitor E1 negative pole, is formed defeated
Go out negative pole DCN.
The correcting circuit, is connected with the filter circuit 2 and rectification circuit 3, for correcting net side power factor, its
In, the first two-way gate-controlled switch BDS1 one end is connected with the first input end N1 of the diode rectifier bridge B1, and described first
The two-way gate-controlled switch BDS1 other end is connected with the first ac capacitor C1 one end, the first ac capacitor C1 other end and institute
The negative pole for stating electrochemical capacitor E1 is connected；Second two-way gate-controlled switch BDS2 one end and the second of the diode rectifier bridge B1 defeated
Enter to hold N2 to be connected, the other end of the second two-way gate-controlled switch BDS2 is connected with the second ac capacitor C2 one end, second hands over
The stream electric capacity C2 other end is connected with the negative pole of the electrochemical capacitor E1；3rd two-way gate-controlled switch BDS3 one end and described two
Pole pipe rectifier bridge B1 the 3rd input N3 is connected, the other end and the 3rd ac capacitor of the 3rd two-way gate-controlled switch BDS3
C3 one end is connected, and the 3rd ac capacitor C3 other end is connected with the negative pole of the electrochemical capacitor E1.
The present embodiment passes through following steps implementation：
It is natural commutation bridge according to diode rectifier bridge B1, there are six line voltages between three bridge arm midpoints, it is in office
Rectified action can occur for meaning moment absolute value highest line voltage, be related to two input live wires, and a power cycle amounts to 6 sections
Line voltage participates in switching process, belongs to natural commutation.If only natural commutation, the electric current of net side is rich in Resonance Wave Composition, power
Factor is relatively low.Its reason is：（1）The angle of flow of diode is less than 120 ° in rectifier bridge, causes the angle of flow of current on line side smaller,
As a result power factor is relatively low；（2）When net side takes filter circuit, the angle of flow of filter inductance can be expanded, as a result power factor
Deviation increase；Therefore need using the angle of flow for expanding diode in rectifier bridge, while setting rational net side wave filter to increase
Plus the angle of flow of filter inductance.Above-mentioned effect is just served for the correcting circuit 4 of this application.
For correcting circuit 4, in a power cycle, the first two-way gate-controlled switch BDS1 can be operated in partially electronically conductive
Under pattern, three two-way gate-controlled switch BDS1~BDS3 one end respectively with three filter inductances and diode rectifier bridge B1, i.e.,
Three bridge arm midpoints connection of rectifier.Operationally ensure that three two-way gate-controlled switches are not simultaneously turned on, thus can be by
Correcting circuit and rectification circuit or even whole circuit reduction are single-phase or line chart, thus whole circuit operation principle except three
Outside natural commutation when only two-way gate-controlled switch does not work, need to only consider single filter inductance, single only two-way gate-controlled switch and
The circuit that corresponding diode rectifier bridge B1 related bridge arm is constituted.Filter inductance L1, the first two-way gate-controlled switch after below
Illustrate exemplified by BDS1 and diode rectifier bridge B1, without loss of generality, it is assumed that whole circuit is in the positive half cycle of the first phase voltage, by
Controller sends drive pulse signal so that the first two-way gate-controlled switch BDS1 is opened and turned off, as a result by first it is two-way can
Control switch BDS1 causes diode rectifier bridge B1 is directly over by left end to right-hand member the second or the 3rd of the first ac capacitor C1
Bridge arm down tube charges, and is charged without electrochemical capacitor E1, as a result the angle of flow increase of the first filter inductance L1 positive half cycle.It is assumed that
Whole circuit is in the secondary half cycle of the first phase voltage, sends drive pulse signal by controller so that BDS1 is opened and turned off, and ties
Fruit causes the first ac capacitor C1 right-hand member to be directly over diode rectifier bridge to left end by the first two-way gate-controlled switch BDS1
The second of B1 or the 3rd pipe on bridge arm and electrochemical capacitor E1 carry out electric discharge charging, that is, discharge, as a result the first filter inductance L1 pair
The angle of flow increase of half cycle.
Rule with turning off is opened by the two-way gate-controlled switch BDS1 of arranged rational first, it is possible to coordinate natural commutation
Process so that positive and negative half cycle filter inductance L1 180 ° of scopes of current crosses and the tracking phase of power network first（A phases）Voltage wave
Shape, suppresses a phases harmonic current within standard prescribed limit, and causes that a phases fundamental current is synchronous with a phase voltage waveforms substantially,
It is obtained with higher power factor.
Identical processing means can be used so that and cause that b, c phase fundamental current and b, c phase voltage waveform are same substantially
Walk, and harmonic current is effectively suppressed.It is final to obtain three-phase high power factor, reach the purpose of PFC.
Pulse send the design of rule and three filter inductance L1 ~ L3 inductance value, three ac capacitor C1 ~ C3 capacitance,
The weight of electrochemical capacitor E1 capacitance, the scope of line voltage and load has relation.Therefore three filter inductance L1 ~ L3's
, it is necessary to according to the weight of load after inductance value, three ac capacitor C1 ~ C3 capacitance, the optimization of electrochemical capacitor E1 capacitance are selected
Two-way gate-controlled switch BDS1~BDS3 break-make rule, including pulse frequency, pulse duty factor and the position of pulse are calculated, this is needed
To be determined according to measured result, it is necessary to which a large amount of work repeatedly are, it is necessary to constantly compare harmonic current standard, such as
IEC61000-3-2, temporarily without available analytic solutions or closed solution.
Above analysis method, the embodiment two that similarly suitable DC loop is connected using double electric capacity.
In the present embodiment, the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3 inductance are
3.5mH~5.5mH, electric current is 15A.First ac capacitor C1, the second ac capacitor C2, the 3rd ac capacitor C3 electric capacity difference
For the μ F of 22 μ F~35, voltage is 250V.First two-way gate-controlled switch BDS1, the second two-way gate-controlled switch BDS2, the 3rd it is two-way can
Control switch BDS3 supports 35A/100 °C, 600V, it is possible to using the pattern of any existing or new two-way gate-controlled switch.Two poles
Pipe rectifier bridge B1 supports 35A/100 °C, 600V.Electrochemical capacitor E1 electric capacity is 4x680 μ F, is divided into two groups, and every group in parallel, in parallel
Every group afterwards is connected again, single only pressure-resistant 450V.Steady resistance R1 is 68k Ω/10W.Switching frequency is 20kHz.
The circuit structure of the present embodiment is simple, it is easy to control, it is whole for three-phase to be widely used in all front stage circuits
In the converters for flowing device, and easy, net side power factor height is designed, suppress harmonic current, DC voltage is steady.
Embodiment two
The present embodiment provides a kind of application circuit of controlled rectification circuit, as shown in Fig. 2 the application circuit includes three-phase
AC network 1, filter circuit 2, rectification circuit 3 and correcting circuit 4.The three-phase alternating current power network 1 include the first live wire Ua,
Second live wire Ub, the 3rd live wire Uc.The filter circuit includes three filter inductances, i.e. the first filter inductance L1, the second filtering
Inductance L2 and the 3rd filter inductance L3.The rectification circuit 3 includes, diode rectifier bridge B1, the first electrochemical capacitor E1,
Two electrochemical capacitor E2, the first steady resistance R1 and the second steady resistance R2, the diode rectifier bridge B1 have three bridges
Arm, i.e. the first bridge arm, the second bridge arm, the 3rd bridge arm.The correcting circuit 4 include the first two-way gate-controlled switch BDS1, second pair
To gate-controlled switch BDS2, the 3rd two-way gate-controlled switch BDS3, the first ac capacitor C1, the second ac capacitor C2, the 3rd alternating current
Hold C3.
Wherein, the three-phase alternating current power network 1 is used to power for whole three-phase controlled rectifier circuit.
The filter circuit 2, is connected with the three-phase alternating current power network 1, for filtering the three-phase alternating current power network output
Alternating current, wherein, the first filter inductance L1 one end is connected with the first live wire Ua in the three-phase alternating current power network 1, the first filter
The ripple inductance L1 other end is connected with the first input end N1 of the diode rectifier bridge B1 in the rectification circuit 3, i.e., with two poles
Pipe rectifier bridge B1 the first bridge arm midpoint is connected；Second filter inductance L2 one end and second in the three-phase alternating current power network 1
Live wire Ub is connected, the second input of the second filter inductance L2 other end and the diode rectifier bridge B1 in the rectification circuit 3
Hold N2 to be connected, i.e., be connected with diode rectifier bridge B1 the second bridge arm midpoint；3rd filter inductance L3 one end and the three-phase
The second live wire Uc in AC network 1 is connected, and the second filter inductance L3 other end and diode in the rectification circuit 3 are whole
The 3rd input N3 for flowing bridge B1 is connected, i.e., be connected with diode rectifier bridge B1 the 3rd bridge arm midpoint.
The rectification circuit 3, is connected, the alternating current for being inputted by filter circuit is converted into directly with the filter circuit 2
Stream electricity, wherein, the first electrochemical capacitor E1 and the first steady resistance R1 are in parallel, and the second electrochemical capacitor E2 and the second steady resistance R1 are simultaneously
, there is direct current ring between the first electrochemical capacitor E1, the first steady resistance R1 and the second electrochemical capacitor E2, the second steady resistance R1 in connection
Save midpoint.The positive pole of the diode rectifier bridge B1 is connected with the first electrochemical capacitor E1 positive pole, forms output cathode DCP, institute
The negative pole for stating diode rectifier bridge B1 is connected with the second electrochemical capacitor E2 negative pole, forms output negative pole DCN.
The correcting circuit, is connected with the filter circuit 2 and rectification circuit 3, for correcting net side power factor, its
In, the first two-way gate-controlled switch BDS1 one end is connected with the first input end N1 of the diode rectifier bridge B1, and described first
The two-way gate-controlled switch BDS1 other end is connected with the first ac capacitor C1 one end, the first ac capacitor C1 other end and institute
The negative pole for stating the first electrochemical capacitor E1 is connected, i.e., the described first ac capacitor C1 other end is connected in the DC link
Point；Second two-way gate-controlled switch BDS2 one end is connected with the second input N2 of the diode rectifier bridge B1, and described second
The two-way gate-controlled switch BDS2 other end is connected with the second ac capacitor C2 one end, the second ac capacitor C2 other end and institute
The negative pole for stating electrochemical capacitor E1 is connected, i.e., the described second ac capacitor C2 other end is connected to the DC link midpoint；The
Three two-way gate-controlled switch BDS3 one end is connected with the 3rd input N3 of the diode rectifier bridge B1, the described 3rd it is two-way can
The control switch BDS3 other end is connected with the 3rd ac capacitor C3 one end, the 3rd ac capacitor C3 other end and the electrolysis
Electric capacity E1 negative pole is connected, i.e., the described 3rd ac capacitor C3 other end is connected to the DC link midpoint.
Three-phase controlled rectifier circuit of the present invention, its circuit structure is simple, control is easy, can be widely used in institute
Some front stage circuits in the converters of three-phase rectifier, and design easily, net side power factor it is high, suppress humorous
Ripple electric current, DC voltage is steady.
In summary, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (8)
1. a kind of three-phase controlled rectifier circuit, it is characterised in that the three-phase controlled rectifier circuit includes：Three-phase alternating current power network,
Filter circuit, rectification circuit and correcting circuit；
The three-phase alternating current power network, for being powered for whole three-phase controlled rectifier circuit；Including the first live wire, the second live wire,
Three live wires；
The filter circuit, is connected with the three-phase alternating current power network, the alternating current for filtering the three-phase alternating current power network output；
Including the first filter inductance, the second filter inductance and the 3rd filter inductance；
The rectification circuit, is connected with the filter circuit, and the alternating current for being inputted by filter circuit is converted into direct current；Bag
Diode rectifier bridge, electrochemical capacitor and steady resistance are included, the diode rectifier bridge has the first bridge arm, the second bridge arm, the 3rd
Bridge arm；
The correcting circuit, is connected with the filter circuit and rectification circuit, for correcting net side power factor；Including first pair
To gate-controlled switch, the second two-way gate-controlled switch, the 3rd two-way gate-controlled switch, the first ac capacitor, the second ac capacitor, Yi Ji
Three ac capacitors；
Wherein, when the three-phase controlled rectifier circuit is in the positive half cycle of the first phase voltage so that the first two-way gate-controlled switch is opened
Logical and shut-off, the angle of flow increase of the positive half cycle of first filter inductance；When the three-phase controlled rectifier circuit is in first
The negative half period of phase voltage so that the first two-way gate-controlled switch is opened and turned off so that the negative half period of first filter inductance
Angle of flow increase；
When the three-phase controlled rectifier circuit is in the positive half cycle of the second phase voltage so that the second two-way gate-controlled switch is opened and closed
It is disconnected, the angle of flow increase of the positive half cycle of second filter inductance；When the three-phase controlled rectifier circuit is in the second phase voltage
Negative half period so that the second two-way gate-controlled switch is opened and turned off so that the angle of flow of the negative half period of second filter inductance
Increase；
When the three-phase controlled rectifier circuit is in the positive half cycle of third phase voltage so that the 3rd two-way gate-controlled switch is opened and closed
It is disconnected, the angle of flow increase of the positive half cycle of the 3rd filter inductance；When the three-phase controlled rectifier circuit is in third phase voltage
Negative half period so that the 3rd two-way gate-controlled switch is opened and turned off so that the angle of flow of the negative half period of the 3rd filter inductance
Increase；
Opening and turning off by the described first two-way gate-controlled switch, the second two-way gate-controlled switch, the 3rd two-way gate-controlled switch, matching somebody with somebody
Close the switching process of the rectification circuit so that the positive and negative filter inductance of half cycle first, the second filter inductance and the 3rd filtering
The current crosses 180 degree scope and tracking power network three-phase voltage waveform of inductance, suppress three-phase phase harmonic current and provide model in standard
Within enclosing, and cause three-phase fundamental current and three-phase voltage synchronous waveform substantially.
2. three-phase controlled rectifier circuit according to claim 1, it is characterised in that：First filtered electrical in the filter circuit
One end of sense is connected with the first live wire in the three-phase alternating current power network, the other end of the first filter inductance and the rectification circuit
In diode rectifier bridge first input end be connected；One end of second filter inductance and second in the three-phase alternating current power network
Live wire is connected, and the other end of the second filter inductance is connected with the second input of the diode rectifier bridge in the rectification circuit；
One end of 3rd filter inductance is connected with the 3rd live wire in the three-phase alternating current power network, the other end of the 3rd filter inductance and institute
The 3rd input for stating the diode rectifier bridge in rectification circuit is connected.
3. three-phase controlled rectifier circuit according to claim 2, it is characterised in that：The diode rectifier bridge first,
Second, third input is the midpoint of the bridge arm of diode rectifier bridge first, second, third.
4. three-phase controlled rectifier circuit according to claim 1, it is characterised in that：Electrochemical capacitor in the rectification circuit
It is in parallel with steady resistance.
5. three-phase controlled rectifier circuit according to claim 1, it is characterised in that：The positive pole of the diode rectifier bridge with
The positive pole of electrochemical capacitor is connected, and forms output cathode, and the negative pole of the diode rectifier bridge is connected with the negative pole of electrochemical capacitor, shape
Into output negative pole.
6. three-phase controlled rectifier circuit according to claim 1, it is characterised in that：In the correcting circuit first it is two-way can
Control switch one end be connected with the first input end of the diode rectifier bridge, the other end of the first two-way gate-controlled switch and
One end of first ac capacitor is connected, and the other end of the first ac capacitor is connected with the negative pole of the electrochemical capacitor.
7. three-phase controlled rectifier circuit according to claim 1, it is characterised in that：In the correcting circuit second it is two-way can
Control switch one end be connected with the second input of the diode rectifier bridge, the other end of the second two-way gate-controlled switch and
One end of second ac capacitor is connected, and the other end of the second ac capacitor is connected with the negative pole of the electrochemical capacitor.
8. three-phase controlled rectifier circuit according to claim 1, it is characterised in that：In the correcting circuit the 3rd it is two-way can
Control switch one end be connected with the 3rd input of the diode rectifier bridge, the other end of the 3rd two-way gate-controlled switch and
One end of 3rd ac capacitor is connected, and the other end of the 3rd ac capacitor is connected with the negative pole of the electrochemical capacitor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210445225.9A CN103812366B (en) | 2012-11-08 | 2012-11-08 | Three-phase controlled rectifier circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210445225.9A CN103812366B (en) | 2012-11-08 | 2012-11-08 | Three-phase controlled rectifier circuit |
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| CN103812366A CN103812366A (en) | 2014-05-21 |
| CN103812366B true CN103812366B (en) | 2017-07-28 |
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|---|---|---|---|---|
| CN105656302B (en) * | 2016-04-07 | 2019-05-03 | 湖州积微电子科技有限公司 | A kind of frequency converter pfc circuit |
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| CN110336458B (en) * | 2019-05-10 | 2020-05-26 | 珠海格力电器股份有限公司 | Harmonic suppression circuit, power supply with same and air conditioner |
| CN110460288B (en) * | 2019-08-05 | 2021-07-16 | 广东美的制冷设备有限公司 | Alternating current fan control circuit and equipment based on three-phase uncontrolled rectification |
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| CN103812366A (en) | 2014-05-21 |
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Effective date of registration: 20191023 Address after: 200433 No. 15, No. 323 National Road, Shanghai, Yangpu District Patentee after: Shanghai Rujing Electric Control Technology Co., Ltd Address before: 200433 No. 1803, 1805, 1806, 335 and 1807, building 2, National Road, Yangpu District, Shanghai Patentee before: Shanghai Ruking Electronic Science & Technology Co., Ltd. |