CN102447403A - Three-phase rectifier circuit with low harmonic wave continuous input current - Google Patents
Three-phase rectifier circuit with low harmonic wave continuous input current Download PDFInfo
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Abstract
A three-phase rectifier circuit with low harmonic wave continuous input current related to the invention can reduce harmonic wave distortion and belongs to the field of power electronics. The three-phase rectifier circuit comprises three-phase four-wire AC current, phase current a, b, c and neutral wire N; a three-phase rectifier KM1; a single-phase rectifier KM2; capacitors C1, C2, C3; diodes D1, D2; inductors L1, L2; switching tubes M1, M2, M3; transformer T1; sensors S1, S2, S3; and a control circuit controlling the switching tubes. By controlling conduction of the switching tubes, the circuit of the invention boosts part of the phase voltage which does not work, rectifies it by the single-phase rectifier KM2 and parallel connects it and output of the three-phase rectifier KM1 to the capacitor C1 to supply energy to the load such that the phase voltage can work continuously, the input current is continuous and approximate to sine wave in order to improve the total power factor and to reduce harmonic wave pollution caused by the rectifier circuit to the grid.
Description
Technical field
The present invention relates to be a kind of with input current by intermittently becoming continuous rectified three-phase circuit, can improve power factor, reduce percent harmonic distortion, with the harm of the harmonic wave that reduces power supply, belong to electric and electronic technical field to electrical network.
Background technology
In the prior art; The problem that the rectified three-phase circuit of known capacitor filtering exists is that input current is interrupted; The harmonic wave total content THD (%r) of electric current is very high, and PF is lower for the total power factor, and electrical network is produced harmonic pollution; Harmonic wave has become a kind of electric power public hazards, and the most effectual way of solution is that the input at equipment is connected to harmonic suppression apparatus.
Summary of the invention
The present invention be directed to the deficiency that prior art exists; Propose a kind of with input current by intermittently becoming continuous rectified three-phase circuit; Make input current waveform near sinusoidal wave, can reduce the rectified three-phase circuit Harmonics of Input content of capacitor filtering, the distortion of proofreading and correct input current; Effectively improve the total power factor, reduce the harmonic pollution that rectification circuit produces electrical network.
The present invention realizes through following technical measures:
1, the rectified three-phase circuit of the continuous input current of a kind of low harmonic wave is characterized in that: comprise the three-phase and four-line alternating current, mutually electric a, b, c and center line N; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M1, M2, M3; Transformer T1; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are divided into two-way; One the tunnel connects a three-phase rectifier KM1, and the second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other; Its common port is connected to an end on the former limit of transformer T1, and the other end on former limit is linked center line N; The secondary of transformer T1 is input to single-phase rectifier KM2; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1, and the negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1; The two poles of the earth of capacitor C 1 are the output of the rectified three-phase circuit of the continuous input current of low harmonic wave of the present invention;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
2, the rectified three-phase circuit of the continuous input current of a kind of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 2, C3, C4, C5; Diode D1, D2; Inductance L 1, L2; Switching tube M1, M2, M3; Transformer T1; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are divided into two-way; One the tunnel connects a three-phase rectifier KM1; The second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other, and its common port is connected to an end on the former limit of transformer T1; Capacitor C 4, C5 series connection, the other end on the former limit of transformer T1 is linked the common port of C4 and C5; The secondary of transformer T1 is input to single-phase rectifier KM2; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to the other end of capacitor C 4, and the negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 5;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C4, C5＜3300 μ F that capacitor C 4, C5 choose scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
3, the rectified three-phase circuit of the continuous input current of a kind of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; Capacitor C 2, C4, C5; Diode D1; Inductance L 1, L3; Switching tube M1, M2, M3; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are divided into two-way, and one the tunnel connects a three-phase rectifier KM1, and the second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other, and its common port is connected to an end of inductance L 3; Capacitor C 4, C5 series connection; The other end of inductance L 3 is linked the common port of C4 and C5; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The L1 other end is connected to the other end of capacitor C 4, and the negative pole of three-phase rectifier KM1 is connected to the other end of capacitor C 5;
The span of said inductance L 1 is 1mH＜L1＜5mH; The span of capacitor C 2 is 0.01 μ F＜C2＜1 μ F; It is 10 μ F＜C4, C5＜3300 μ F that capacitor C 4, C5 choose scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
4, the rectified three-phase circuit of the continuous input current of a kind of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M4, M5, M6, M7, M8, M9; Transformer T2; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are connected to an end of three windings in the former limit of transformer T2 respectively, and the end of switching tube M6, M8 is linked on the phase voltage a, and the end of switching tube M4, M9 is linked on the phase voltage b; The end of switching tube M5, M7 is linked on the phase voltage c; M4 links to each other with the M5 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage a; M6 links to each other with the M7 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage b; M8 links to each other with the M9 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage c; Transformer T2 secondary is input to single-phase rectifier KM2; Three-phase alternating current a, b, c are connected to three-phase rectifier KM1 ac input end respectively; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1; The negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M4, M5, M6, M7, M8, M9 are the single-way switch pipe, adopt MOSFET or IGBT.
5, the rectified three-phase circuit of the continuous input current of a kind of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M10, M11, M12; Transformer T3; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; The former limit winding of transformer T3 is connected into triangle, and its node is connected to the end of switching tube M10, M11, M12 respectively, and the other end of switching tube M10, M11, M12 is connected to three-phase alternating current a, b, c respectively; Transformer T3 secondary is input to single-phase rectifier KM2; Three-phase alternating current a, b, c are connected to three-phase rectifier KM1 ac input end respectively; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1; The negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M10, M11, M12 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
For the rectified three-phase circuit of known capacitor filtering, three-phase alternating current as shown in Figure 1, in one-period: mutually electric Ua does not work discontinuous current between h-I and k-l section; Uc does not work discontinuous current between j-k and m-n section; Uc does not work between e-f and i-j section, and discontinuous current can make input current abnormality very big like this, and current harmonic content is high, to the harmonic pollution of electrical network generation.And circuit of the present invention comes the shutoff of opening of control switch pipe M1, M2, M3 through control circuit; The idle part of phase voltage through transformer boost with single-phase rectifier KM2 rectification after be connected to filter capacitor C1 with the output-parallel of three-phase rectifier KM1; Supply load; Thereby make the phase voltage continuous operation, continuous input current and approaching sinusoidal wave effectively improves the total power factor.Below 5 embodiment basic functional principle the same, all be through the turning on and off of control switch pipe, make the original idle part of its every phase voltage can continuous operation, make input circuit continuously and near sinusoidal wave, effectively improve the total power factor.
Description of drawings
Fig. 1 three-phase phase voltage oscillogram
The circuit diagram of Fig. 2 first embodiment of the invention
The circuit diagram of Fig. 3 second embodiment of the invention
The circuit diagram of Fig. 4 third embodiment of the invention
The circuit diagram of Fig. 5 four embodiment of the invention
The circuit diagram of Fig. 6 fifth embodiment of the invention
Embodiment
Fig. 2 has provided the circuit diagram of present embodiment, and the rectified three-phase circuit of the continuous input current of this low harmonic wave comprises the three-phase and four-line alternating current, mutually electric a, b, c and center line N; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M1, M2, M3; Transformer T1; Transducer S1, S2, S3; And the control circuit of control switch pipe; It is characterized in that: three-phase alternating current a, b, c are divided into two-way; One the tunnel connects a three-phase rectifier KM1; The second the road is connected to the end of three switching tube M1, M2, M3; The other end of three switching tubes links to each other, and its common port is connected to an end on the former limit of transformer T1, and the other end on former limit is linked center line N; The secondary of transformer T1 is input to single-phase rectifier KM2; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1, and the negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1; The two poles of the earth of capacitor C 1 are the output of the rectified three-phase circuit of the continuous input current of low harmonic wave of the present invention.
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, the module of forming by MOSFET and diode or the module of forming by IGBT and diode.
Its operation principle: for the rectified three-phase circuit of known capacitor filtering, three-phase alternating current as shown in Figure 1, in one-period: mutually electric Ua does not work discontinuous current between h-I and k-l section; Uc does not work discontinuous current between j-k and m-n section; Uc does not work between e-f and i-j section, and discontinuous current can make input current abnormality very big like this, and current harmonic content is high, to the harmonic pollution of electrical network generation.And present embodiment circuit working principle of the present invention is, and is when that road phase voltage of correspondence can not be worked, open-minded through the switch of controlling on the corresponding line; And the switch on other phase line turn-offs; Boost through transformer T1 and to boost a corresponding phase voltage,, thereby make the phase voltage continuous operation through supply load after the rectifier KM2 rectification; Continuous input current and approaching sinusoidal wave effectively improves the total power factor.
Fig. 3 has provided the circuit diagram of present embodiment, comprises three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 2, C3, C4, C5; Diode D1, D2; Inductance L 1, L2; Switching tube M1, M2, M3; Transformer T1; Transducer S1, S2, S3; And the control circuit of control switch pipe; It is characterized in that: three-phase alternating current a, b, c are divided into two-way; One the tunnel connects a three-phase rectifier KM1; The second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other, and its common port is connected to an end on the former limit of transformer T1; Capacitor C 4, C5 series connection, the other end on the former limit of transformer T1 is linked the common port of C4 and C5; The secondary of transformer T1 is input to single-phase rectifier KM2; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to the other end of capacitor C 4, and the negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 5.
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C4, C5＜3300 μ F that capacitor C 4, C5 choose scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, the module of forming by MOSFET and diode or the module of forming by IGBT and diode.
It is the same with embodiment 1 that its operation principle is followed; Different with embodiment 1 is filter capacitor C1 is by capacitor C 4 and the C5 replacement that is in series; And do not need center line N; Be used as the N line to the common port of C4 and C5, and be connected to the other end of transformer T1 the common port of C4 and C5, this is very valuable for the equipment of the sort of three-phase three-wire system that does not have a center line.
Fig. 4 has provided the circuit diagram of present embodiment, comprises three-phase alternating current a, b, c; A three-phase rectifier KM1; Capacitor C 2, C4, C5; Diode D1; Inductance L 1, L3; Switching tube M1, M2, M3; Transducer S1, S2, S3; And the control circuit of control switch pipe; It is characterized in that: three-phase alternating current a, b, c are divided into two-way, and one the tunnel connects a three-phase rectifier KM1, and the second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other, and its common port is connected to an end of inductance L 3; Capacitor C 4, C5 series connection; The other end of inductance L 3 is linked the common port of C4 and C5; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The L1 other end is connected to the other end of capacitor C 4, and the negative pole of three-phase rectifier KM1 is connected to the other end of capacitor C 5.
The span of said inductance L 1 is 1mH＜L1＜5mH; The span of capacitor C 2 is 0.01 μ F＜C2＜1 μ F; It is 10 μ F＜C4, C5＜3300 μ F that capacitor C 4, C5 choose scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, the module of forming by MOSFET and diode or the module of forming by IGBT and diode.
It is the same with embodiment 1,2 that its operation principle is followed; All be to hope to make its work through the idle part of a phase voltage that turns on and off of control switch pipe; Make continuous input current; Different with embodiment 1,2 is: embodiment the 1, the 2nd, boosts through transformer and boost a corresponding phase voltage after supply load behind the over commutation, and efficient is high; And present embodiment is the common port that is connected to the common port of three bidirectional switch M1, M2, M3 through L3 C4 and C5; Not the energy supply load, efficient is not low, but economization a lot of devices; Such as single-phase rectifier KM2, D2, L2 and C3, reduced cost greatly.
Fig. 5 has provided the circuit diagram of present embodiment, comprises three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M4, M5, M6, M7, M8, M9; Transformer T2; Transducer S1, S2, S3; And the control circuit of control switch pipe; It is characterized in that: three-phase alternating current a, b, c are connected to an end of three windings in the former limit of transformer T2 respectively, and the end of switching tube M6, M8 is linked on the phase voltage a, and the end of switching tube M4, M9 is linked on the phase voltage b; The end of switching tube M5, M7 is linked on the phase voltage c; M4 links to each other with the M5 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage a; M6 links to each other with the M7 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage b; M8 links to each other with the M9 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage c; Transformer T2 secondary is input to single-phase rectifier KM2; Three-phase alternating current a, b, c are connected to three-phase rectifier KM1 ac input end respectively; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1; The negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1.
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M4, M5, M6, M7, M8, M9 are the single-way switch pipe, adopt MOSFET or IGBT.
Its operation principle: shown in 1; With the one-period is example; In the o-f of phase voltage Uc section, open-minded through control circuit control corresponding switch, other switch turn-offs; Make one of them winding two ends, former limit of transformer T2 add the voltage U ac that reaches the standard grade (Uac＞0), in like manner can make winding two ends, corresponding former limit add the voltage U ab that reaches the standard grade (Uab＞0) in the f-p section; Can make winding two ends, corresponding former limit add the voltage U cb that reaches the standard grade (Ucb＜0) in the p-h section; Can make winding two ends, former limit add the voltage U ca that reaches the standard grade (Uca＜0) in the h-q section; Can make winding two ends, former limit add the voltage U ba that reaches the standard grade (Uba＞0) in the q-i section; Can make winding two ends, former limit add the voltage U bc that reaches the standard grade (Ubc＞0) in the i-r section; Can make winding two ends, former limit add the voltage U ac that reaches the standard grade (Uac＜0) in the r-j section; Can make winding two ends, former limit add the voltage U ab that reaches the standard grade (Uab＜0) in the j-s section.Boost corresponding line boost in voltage after supply load behind the over commutation through transformer T2, thereby make the original idle partial continuous work of every phase voltage, continuous input current and near sinusoidal wave effectively improves the total power factor.
Its operation principle is followed similar with embodiment 1, all is to make its work to the idle part of every phase voltage through turning on and off of control switch pipe, and makes its energy supply load; Make continuous input current, different with embodiment 1 is: embodiment 1 boosts phase voltage after the rectification, the energy supply load; And present embodiment is after the rectification of line boost in voltage, the energy supply load, because line voltage otherwise phase voltage value want big; So the no-load voltage ratio of boosting of its transformer little than embodiment 1; So can reduce transformer secondary umber of turn, reduce the volume and weight of transformer, and its usefulness be the single-way switch pipe; Want simple with respect to the bidirectional switch tubular construction of embodiment 1, but its control circuit wants complicated with respect to embodiment 1.
Fig. 6 has provided the circuit diagram of present embodiment, comprises three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M10, M11, M12; Transformer T3; Transducer S1, S2, S3; And the control circuit of control switch pipe; It is characterized in that: the former limit winding of transformer T3 is connected into triangle, and its node is connected to the end of switching tube M10, M11, M12 respectively, and the other end of switching tube M10, M11, M12 is connected to three-phase alternating current a, b, c respectively; Transformer T3 secondary is input to single-phase rectifier KM2; Three-phase alternating current a, b, c are connected to three-phase rectifier KM1 ac input end respectively; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1; The negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1.
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M10, M11, M12 are the bidirectional switch pipe, the module of forming by MOSFET and diode or the module of forming by IGBT and diode.
The operation principle of present embodiment is the same with embodiment 4; All be after the rectification of line boost in voltage the energy supply load; Different with embodiment 4 is: 6 single-way switch pipes of embodiment 4 usefulness; 3 bidirectional switch pipes that present embodiment is used, the former limit of its transformer winding quantity is different, and it is also different to connect method.
Claims (5)
1. the rectified three-phase circuit of the continuous input current of low harmonic wave is characterized in that: comprise the three-phase and four-line alternating current, mutually electric a, b, c and center line N; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M1, M2, M3; Transformer T1; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are divided into two-way; One the tunnel connects a three-phase rectifier KM1, and the second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other; Its common port is connected to an end on the former limit of transformer T1, and the other end on former limit is linked center line N; The secondary of transformer T1 is input to single-phase rectifier KM2; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1, and the negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1; The two poles of the earth of capacitor C 1 are the output of the rectified three-phase circuit of the continuous input current of low harmonic wave of the present invention;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
2. the rectified three-phase circuit of the continuous input current of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 2, C3, C4, C5; Diode D1, D2; Inductance L 1, L2; Switching tube M1, M2, M3; Transformer T1; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are divided into two-way; One the tunnel connects a three-phase rectifier KM1; The second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other, and its common port is connected to an end on the former limit of transformer T1; Capacitor C 4, C5 series connection, the other end on the former limit of transformer T1 is linked the common port of C4 and C5; The secondary of transformer T1 is input to single-phase rectifier KM2; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to the other end of capacitor C 4, and the negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 5;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C4, C5＜3300 μ F that capacitor C 4, C5 choose scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
3. the rectified three-phase circuit of the continuous input current of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; Capacitor C 2, C4, C5; Diode D1; Inductance L 1, L3; Switching tube M1, M2, M3; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are divided into two-way, and one the tunnel connects a three-phase rectifier KM1, and the second the road is connected to the end of three switching tube M1, M2, M3, and the other end of three switching tubes links to each other, and its common port is connected to an end of inductance L 3; Capacitor C 4, C5 series connection; The other end of inductance L 3 is linked the common port of C4 and C5; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The L1 other end is connected to the other end of capacitor C 4, and the negative pole of three-phase rectifier KM1 is connected to the other end of capacitor C 5;
The span of said inductance L 1 is 1mH＜L1＜5mH; The span of capacitor C 2 is 0.01 μ F＜C2＜1 μ F; It is 10 μ F＜C4, C5＜3300 μ F that capacitor C 4, C5 choose scope; Switching tube M1, M2, M3 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
4. the rectified three-phase circuit of the continuous input current of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M4, M5, M6, M7, M8, M9; Transformer T2; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; Three-phase alternating current a, b, c are connected to an end of three windings in the former limit of transformer T2 respectively, and the end of switching tube M6, M8 is linked on the phase voltage a, and the end of switching tube M4, M9 is linked on the phase voltage b; The end of switching tube M5, M7 is linked on the phase voltage c; M4 links to each other with the M5 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage a; M6 links to each other with the M7 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage b; M8 links to each other with the M9 other end, and its common port is linked the other end of the former limit winding that links to each other with phase voltage c; Transformer T2 secondary is input to single-phase rectifier KM2; Three-phase alternating current a, b, c are connected to three-phase rectifier KM1 ac input end respectively; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1; The negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M4, M5, M6, M7, M8, M9 are the single-way switch pipe, adopt MOSFET or IGBT.
5. the rectified three-phase circuit of the continuous input current of low harmonic wave is characterized in that: comprise three-phase alternating current a, b, c; A three-phase rectifier KM1; A single-phase rectifier KM2; Capacitor C 1, C2, C3; Diode D1, D2; Inductance L 1, L2; Switching tube M10, M11, M12; Transformer T3; The control circuit of control switch pipe; And transducer S1, S2, S3 to be connected on three-phase alternating current a, b, c respectively last, all be connected on the described control circuit then; The former limit winding of transformer T3 is connected into triangle, and its node is connected to the end of switching tube M10, M11, M12 respectively, and the other end of switching tube M10, M11, M12 is connected to three-phase alternating current a, b, c respectively; Transformer T3 secondary is input to single-phase rectifier KM2; Three-phase alternating current a, b, c are connected to three-phase rectifier KM1 ac input end respectively; The positive pole output of three-phase rectifier KM1 is connected to an end of inductance L 1; Capacitor C 2 is connected in parallel on the L1 two ends with diode D1; The positive pole output of single-phase rectifier KM2 is connected to an end of inductance L 2; Capacitor C 3 is connected in parallel on the L2 two ends with diode D2; The other end of L1 and L2 is connected to an end of capacitor C 1; The negative pole of three-phase rectifier KM1 and single-phase rectifier KM2 is connected to the other end of capacitor C 1;
The span of said inductance L 1, L2 is 1mH＜L1, L2＜5mH; The span of capacitor C 2, C3 is 0.01 μ F＜C2, C3＜1 μ F; It is 10 μ F＜C1＜3300 μ F that capacitor C 1 is chosen scope; Switching tube M10, M11, M12 are the bidirectional switch pipe, module of being made up of MOSFET and diode or the module of being made up of IGBT and diode.
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Application publication date: 20120509 Assignee: Beijing Arc Light Technology Co.,Ltd. Assignor: Beijing University of Technology Contract record no.: X2023990000865 Denomination of invention: A three-phase rectifier circuit with low harmonic continuous input current Granted publication date: 20140226 License type: Common License Record date: 20231016 |
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