CN102157968A - High-power charger for maglev train - Google Patents
High-power charger for maglev train Download PDFInfo
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Abstract
The invention provides a high-power charger for a maglev train, which comprises an input filter circuit, an inverting circuit, an isolation transformer, a rectifying circuit, an output filter circuit and a control circuit, wherein the inverting circuit comprises at least two inverting modules, and all the inverting modules are connected in series; the isolation transformer comprises at least two transformers, each transformer corresponds to an inverting module, and each secondary winding of each transformer is connected with the rectifying circuit; each transformer comprises at least one secondary winding; the output ends of all the rectifying circuits are connected in parallel; the output end of the rectifying circuit is connected with the output filter circuit; a direct current-alternating current-direct current power supply mode is adopted; high voltage and low voltage are electrically isolated by adopting the isolation transformer so as to ensure the safety of passengers and staffs; the isolation transformer has stronger antijamming capability on a low-frequency signal, and the inductance in the output filter circuit can be less, thereby the volume and the weight of the whole charger are reduced to meet the requirement of an on-board power supply.
Description
Technical field
The present invention relates to magnetic suspension train power supply technique field, the high-power charger of particularly a kind of magnetic suspension train.
Background technology
The power-supply system of at present domestic low speed magnetic suspension train is DC1500V-DC330V, and the charger that needs needs high-power, for example up to 60kW.At present, high-power charger normally is made of chopper circuit, is needed direct voltage with the high-voltage dc voltage copped wave of importing directly promptly.The shortcoming of this copped wave DC power supply is not pass through electrical isolation between the input and output, to the high-voltage dc voltage Direct Transform is the direct voltage of another kind of electric pressure, and the strict electrical isolation of magnetic suspension train power requirement, to guarantee passenger and staff's safety.
The charger that magnetic suspension train is used need load ON TRAINS, moves with train, therefore, weight, volume and the load characteristic of charger is all had the requirement of harshness.
Summary of the invention
The technical problem to be solved in the present invention provides the high-power charger of a kind of magnetic suspension train, and is safe and reliable, and volume is less, weight is low weight, can satisfy the requirement of vehicle power.
The embodiment of the invention provides a kind of magnetic suspension train high-power charger, comprising: input filter circuit, inverter circuit, isolating transformer, rectification circuit, output filter circuit and control circuit;
The input of described input filter circuit connects high-voltage DC power supply, is used for high-voltage DC power supply is carried out filtering, and output connects the input of described inverter circuit;
Described inverter circuit comprises at least two inversion modules, and it is AC power that all inversion modules are cascaded the high-voltage DC power supply inversion;
Described isolating transformer comprises at least two transformers, is used for AC power is carried out step-down and electrical isolation, and the respectively corresponding inversion module of each transformer, each secondary winding of each transformer connects a rectification circuit; Each transformer comprises at least one secondary winding;
The AC power rectification that each described rectification circuit is used for each transformer output is a DC power supply, and the output of each described rectification circuit is connected in parallel;
The output of described rectification circuit connects output filter circuit, is used for the DC power supply of rectification circuit output is carried out filtering;
Control circuit is used for controlling the on off state of the switching device of inversion module.
Preferably, described each transformer comprises two secondary winding, and the output of each secondary winding connects a rectification circuit.
Preferably, the full bridge rectifier of described rectification circuit for constituting by uncontrollable diode.
Preferably, described inverter circuit is full bridge inverter or half-bridge inversion circuit.
Preferably, the switching device in the described inverter circuit is MOSFET module, IGBT module or Intelligent Power Module IPM.
Preferably, first anti-jamming circuit that also comprises the elementary winding two ends that are connected described each transformer;
Described first anti-jamming circuit comprises: the resistance of series connection and electric capacity.
Preferably, second anti-jamming circuit that also comprises each the secondary winding two ends that is connected each transformer;
Described second anti-jamming circuit comprises: the resistance of series connection and electric capacity.
Preferably, also comprise soft starting circuit;
Described soft starting circuit comprises: first resistance, counnter attack diode and contactor;
Be connected in parallel on the two ends of contactor after described first resistance and the series connection of counnter attack diode; Described contactor is connected between the inductance and electric capacity in the input filter circuit;
In the charger start-up course, described contactor disconnects, after startup finishes, and described contactor closure.
Preferably, also comprise voltage transformer, be used to measure the input voltage of inverter circuit and the output voltage of rectification circuit, the voltage of measuring is sent to control circuit, control circuit is according to the PWM ripple of the voltage control output of measuring, and described PWM ripple is used for driving the on off state of inverter circuit switching device.
Preferably, the output parallel voltage-stabilizing resistance of described rectification circuit.
Compared with prior art, the present invention has the following advantages:
The high-power charger of magnetic suspension train provided by the invention, adopt the powering mode of DC-AC-direct current, wherein adopt isolating transformer that high pressure and low pressure are carried out electrical isolation, guarantee passenger and staff's safety, and can avoid the electrical Interference between high pressure and the low pressure like this.Because isolating transformer is a high-frequency element, therefore stronger to the antijamming capability of low frequency signal, what the inductance in the output filter circuit can be done like this is smaller, thereby reduces the volume and weight of whole charger, to satisfy the requirement of magnetic suspension train to vehicle power.
Description of drawings
Fig. 1 is the structure chart of magnetic suspension train provided by the invention with high-power charger;
Fig. 2 is the circuit diagram of input filter circuit provided by the invention and soft starting circuit;
Fig. 3 is the schematic diagram of inverter circuit provided by the invention and isolating transformer;
Fig. 4 is the circuit diagram of rectification circuit provided by the invention;
Fig. 5 is the circuit diagram of magnetic suspension train provided by the invention with high-power charger.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
Referring to Fig. 1, this figure is the structure chart of magnetic suspension train provided by the invention with high-power charger.
The high-power charger of the magnetic suspension train that the embodiment of the invention provides comprises: input filter circuit 100, inverter circuit 200, isolating transformer 300, rectification circuit 400, output filter circuit 500 and control circuit 600;
The input of described input filter circuit 100 connects high-voltage DC power supply, is used for high-voltage DC power supply is carried out filtering, and output connects the input of described inverter circuit 200;
Described inverter circuit 200 comprises at least two inversion modules, and it is AC power that all inversion modules are cascaded the high-voltage DC power supply inversion;
Because the input voltage in the magnetic suspension train is DC1500V, therefore in order to reduce the voltage stress of switching device in the inverter circuit 200, adopted the inversion module of two series connection, 1500V is equally divided into two halves, the input voltage of each inversion module is 750V.The circuit structure and the device parameters of two inversion modules are identical, and each transmits the power of half.
Described isolating transformer 300 comprises two transformers, is used for AC power is carried out step-down and electrical isolation, and the respectively corresponding inversion module of each transformer, each secondary winding of each transformer connects a rectification circuit 400; Each transformer comprises at least one secondary winding;
In order to reduce the voltage stress that rectifying device bears in the rectification circuit 400, Secondary winding of transformer can adopt a plurality of.
The AC power rectification that each described rectification circuit 400 is used for each transformer output is a DC power supply, and the output of each described rectification circuit 400 is connected in parallel;
The output of described rectification circuit 400 connects output filter circuit 500, is used for the DC power supply of rectification circuit 400 outputs is carried out filtering;
The high-power charger of magnetic suspension train provided by the invention, adopt the powering mode of DC-AC-direct current, wherein adopt isolating transformer that high pressure and low pressure are carried out electrical isolation, passenger and staff's safety can be guaranteed, and the electrical Interference between high pressure and the low pressure can be avoided like this.Because isolating transformer is a high-frequency element, therefore stronger to the antijamming capability of low frequency signal, what the inductance in the output filter circuit just can be done like this is less, thereby reduces the volume and weight of whole charger, to satisfy the requirement of magnetic suspension train to vehicle power.
Introduce the implementation of each part in the charger provided by the invention below in conjunction with accompanying drawing.
Referring to Fig. 2, this figure is the circuit diagram of input filter circuit provided by the invention and soft starting circuit.
The input filter circuit that present embodiment provides comprises input electromagnetic interface filter Z1, first inductance L 1, the first filter capacitor C1;
First inductance L 1 is connected in the major loop, and the first filter capacitor C1 is connected in parallel on the input of inverter circuit;
Described soft starting circuit comprises: first resistance R 1, counnter attack diode VD1 and contactor KM1;
Be connected in parallel on the two ends of contactor KM1 after described first resistance R 1 and the counnter attack diode VD1 series connection; Described contactor KM1 is connected between first inductance L 1 and the first filter capacitor C1 in the input filter circuit;
In the charger start-up course, control circuit is controlled described contactor KM1 and is disconnected, and the high-voltage DC power supply of input is that C1 charges by R1 and VD1, can reduce the impulse current in the charging process like this.When control circuit detect charging finish promptly start finish after, control described contactor KM1 closure, and then with R1 and VD1 short circuit.
VD1 is used to prevent that thereby the polarity of high-voltage DC power supply from connecing instead causes C1 to bear reverse voltage and damage.
Piezo-resistance RV is connected in parallel on the high-voltage DC power supply two ends of input, is used to absorb the extreme high voltage that voltage jump produces, and plays the protection input circuit between the positive negative wire of high-voltage DC power supply.
Voltage sensor (SV1 and SV2) is used to detect the input voltage of inverter circuit.Because the inverter circuit among the application has adopted two inversion modules, so corresponding voltage sensor of each inversion module, wherein the first voltage sensor SV1 is used to detect the voltage of the input of first inversion module, and the second voltage sensor SV2 is used to detect the voltage of the input of second inversion module.
Referring to Fig. 3, this figure is the schematic diagram of inverter circuit provided by the invention and isolating transformer.
Inverter circuit in the present embodiment preferably includes two inversion modules, is respectively first inversion module and second inversion module.The circuit structure of two inversion modules is all identical with device parameters.Be understandable that two inversion modules are divided the high-voltage DC power supply of input equally, each inversion module transmits the power of half.Certainly, in order to reduce the voltage stress of switching device in the inverter circuit, can consider to add inversion module, the electric pressure of the high-voltage DC power supply assigned to of each inversion module will descend like this, and the power of transmission will reduce.
The preferred half-bridge inversion circuit that adopts because the device in the half-bridge inversion circuit is less, is controlled fairly simple in the present embodiment.Be understandable that, also can adopt full bridge inverter.
First inversion module comprises second capacitor C 2, the 6th capacitor C 6, the 4th resistance R 4, the 5th resistance R 5, the first switching tube VT1 and second switch pipe VT2;
C2 and C6 series connection back and VT1 that connects and VT2 parallel connection, R4 is connected in parallel on the two ends of C2, and R5 is connected in parallel on the two ends of C6.
Second inversion module comprises the tenth capacitor C the 10, the 14 capacitor C 14, the 6th resistance R 6, the 7th resistance R 7, the 3rd switching tube VT3 and the 4th switching tube VT4;
C10 and C14 series connection back and VT3 that connects and VT4 parallel connection, R6 is connected in parallel on the two ends of C10, and R7 is connected in parallel on the two ends of C14.
Need to prove that the voltage at C2 and two ends, C6 series connection back is half of high-voltage DC power supply, the voltage at C10 and two ends, C14 series connection back also is half of high-voltage DC power supply.Such two inversion modules respectively transmit the power of half.Because inversion module adopts the mode of semi-bridge inversion, therefore, the voltage stress that each switching tube bore has only 1/4 of high-voltage DC power supply.
Need to prove that the switching tube in the inversion module can adopt MOSFET module, IGBT module or Intelligent Power Module (IPM, Intelligent Power Module).
Because the inverter circuit among this embodiment comprises two inversion modules, therefore to two transformers should be arranged, as can be seen from Figure 3, the output of each inversion module connects a transformer, and the output that the output of first inversion module connects the first transformer T1, second inversion module connects the second transformer T2.
The charger that present embodiment provides also comprises first anti-jamming circuit at the elementary winding two ends that are connected each transformer, comprising: the resistance of series connection and electric capacity.First anti-jamming circuit that the elementary winding two ends of T1 connect comprises two resistance and electric capacity of series connection, is respectively R10, R11 and C18.First anti-jamming circuit that the elementary winding two ends of T2 connect also comprises two resistance and electric capacity of series connection, is respectively R12, R13 and C19.
The effect of first anti-jamming circuit is the spike that absorbs on the primary winding.
Each Secondary winding of transformer connects a rectification circuit, and in order to reduce the voltage stress of rectifying device in the rectification circuit, preferred each transformer comprises two secondary winding in the present embodiment, therefore, and two rectification circuits of the follow-up connection of each transformer.
Be understandable that, the number of transformer secondary output winding can be set as required, for example can for one, can for two, also can be three.The number of secondary winding is many more, and the voltage stress that the rectifying device in the rectification circuit bears is more little.Introduce rectification circuit below.
Referring to Fig. 4, this figure is the circuit diagram of rectification circuit provided by the invention.
Rectification circuit in the present embodiment preferably adopts the full bridge rectifier of being made up of uncontrollable diode, owing to adopt two transformers in embodiment illustrated in fig. 3, each transformer comprises two secondary winding, each secondary winding connects a rectification circuit, therefore, Fig. 4 shows four full bridge rectifiers.
First rectification circuit comprises four diodes, is respectively VD2, VD3, VD6 and VD7.
Second rectification circuit comprises four diodes, is respectively VD10, VD11, VD14 and VD15.
The 3rd rectification circuit comprises four diodes, is respectively VD4, VD5, VD8 and VD9.
The 4th rectification circuit comprises four diodes, is respectively VD12, VD13, VD16 and VD17.
Need to prove, only illustrated among Fig. 4 to be understandable that the simplest form of full bridge rectifier that each diode can be realized by a plurality of diode parallel connections,
The output of first rectification circuit and second rectification circuit the 22 resistance R 22 in parallel; The output of the 3rd rectification circuit and the 4th rectification circuit the 23 resistance R 23 in parallel.
R22 and R23 all are voltage regulation resistances, and effect is to avoid voltage to float.
The two ends of each secondary winding connect second anti-jamming circuit, comprise the resistance and the electric capacity of series connection.Second anti-jamming circuit in the present embodiment comprises two resistance and electric capacity of series connection, and as shown in Figure 4, the two ends of first secondary winding of the first transformer T1 connect the 14 resistance R the 14, the 20 capacitor C 20 and the 15 resistance R 15 of series connection; The two ends of the second subprime winding of the first transformer T1 connect the 16 resistance R the 16, the 21 capacitor C 21 and the 17 resistance R 17 of series connection; The two ends of first secondary winding of the second transformer T2 connect the 18 resistance R the 18, the 22 capacitor C 22 and the 19 resistance R 19 of series connection; The two ends of the second subprime winding of the second transformer T2 connect the 20 resistance R the 20, the 23 capacitor C 23 and the 21 resistance R 21 of series connection.
The effect of second anti-jamming circuit mainly is in order to absorb the spike on the transformer secondary output winding.
Referring to Fig. 5, this figure is the circuit diagram of magnetic suspension train provided by the invention with high-power charger.
As can be seen from Figure 5, circuit among this figure has comprised the part of Fig. 2-Fig. 4, and added voltage sensor among this figure, be used to detect the voltage of inverter circuit input and the voltage of rectification circuit output end, and give control circuit with the Voltage Feedback that detects, control circuit is according to the duty ratio of the pwm pulse of the voltage control output that detects, and pwm pulse is used for driving the on off state of switching tube in the inverter circuit.
The voltage sensor of inverter circuit input has the first voltage sensor SV1, the second voltage sensor SV2;
The voltage sensor of rectification circuit output end has tertiary voltage transducer SV3, is used to measure the voltage of whole charger output, and feeds back to control circuit, and control circuit is adjusted pwm pulse according to the voltage of inverter circuit input and the output voltage of charger.
Charger also comprises two current sensors in the present embodiment, be respectively the first current sensor SC1 and the second current sensor SC2, wherein SC1 is used to measure the output total current of charger, SC2 is used to measure the output current that charges a battery, and wherein charging current is the part of output total current.The measurement feedback of SC1 and SC2 is given control circuit, and control circuit is according to the output current of measured value control charger.
The magnetic suspension train that the embodiment of the invention provides adopts straight-friendship-straight unsteady flow mode with high-power charger, because electric pressure is than higher (DC1500), power ratio big (60kW), because the price of the high switching tube of voltage ability to bear is higher, and risk is bigger.The switching tube volume of high pressure grade generally is twice above than the switching tube volume of low pressure grade, weight is also heavy a lot.The switching tube heat radiation of high pressure grade requires to require than the switching tube heat radiation of low pressure grade high a lot, not on an order of magnitude.Therefore in order to save cost, reduce the voltage ability to bear of switching tube in the inverter circuit, adopt two inversion module series connection to carry out inversion, realized that the switching device of low voltage grade is applied to the occasion of high voltage for the high-voltage DC power supply of importing.In order to reduce the voltage stress of diode in the rectification circuit, the secondary winding of isolating transformer adopts two, can certainly take a plurality of.Isolating transformer plays the effect that step-down is isolated, and can reduce interference, the inductance in the output filter circuit is reduced, and then reduce weight and volume.The output galvanic current presses 330, the one road to supply with the train main line after the direct voltage process output filter filtering of rectification circuit output, and one the tunnel charges a battery.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all still belongs in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (10)
1. the high-power charger of magnetic suspension train is characterized in that, comprising: input filter circuit, inverter circuit, isolating transformer, rectification circuit, output filter circuit and control circuit;
The input of described input filter circuit connects high-voltage DC power supply, is used for high-voltage DC power supply is carried out filtering, and output connects the input of described inverter circuit;
Described inverter circuit comprises at least two inversion modules, and it is AC power that all inversion modules are cascaded the high-voltage DC power supply inversion;
Described isolating transformer comprises at least two transformers, is used for AC power is carried out step-down and electrical isolation, and the respectively corresponding inversion module of each transformer, each secondary winding of each transformer connects a rectification circuit; Each transformer comprises at least one secondary winding;
The AC power rectification that each described rectification circuit is used for each transformer output is a DC power supply, and the output of each described rectification circuit is connected in parallel;
The output of described rectification circuit connects output filter circuit, is used for the DC power supply of rectification circuit output is carried out filtering;
Control circuit is used for controlling the on off state of the switching device of inversion module.
2. the high-power charger of magnetic suspension train according to claim 1 is characterized in that described each transformer comprises two secondary winding, and the output of each secondary winding connects a rectification circuit.
3. the high-power charger of magnetic suspension train according to claim 1 is characterized in that, the full bridge rectifier of described rectification circuit for being made of uncontrollable diode.
4. the high-power charger of magnetic suspension train according to claim 1 is characterized in that described inverter circuit is full bridge inverter or half-bridge inversion circuit.
5. the high-power charger of magnetic suspension train according to claim 4 is characterized in that, the switching device in the described inverter circuit is MOSFET module, IGBT module or Intelligent Power Module IPM.
6. the high-power charger of magnetic suspension train according to claim 1 is characterized in that, also comprises first anti-jamming circuit at the elementary winding two ends that are connected described each transformer;
Described first anti-jamming circuit comprises: the resistance of series connection and electric capacity.
7. the high-power charger of magnetic suspension train according to claim 1 and 2 is characterized in that, also comprises second anti-jamming circuit at each the secondary winding two ends that is connected each transformer;
Described second anti-jamming circuit comprises: the resistance of series connection and electric capacity.
8. the high-power charger of magnetic suspension train according to claim 1 is characterized in that, also comprises soft starting circuit;
Described soft starting circuit comprises: first resistance, counnter attack diode and contactor;
Be connected in parallel on the two ends of contactor after described first resistance and the series connection of counnter attack diode; Described contactor is connected between the inductance and electric capacity in the input filter circuit;
In the charger start-up course, described contactor disconnects, after startup finishes, and described contactor closure.
9. the high-power charger of magnetic suspension train according to claim 1, it is characterized in that, also comprise voltage transformer, be used to measure the input voltage of inverter circuit and the output voltage of rectification circuit, the voltage of measuring is sent to control circuit, control circuit is according to the PWM ripple of the voltage control output of measuring, and described PWM ripple is used for driving the on off state of inverter circuit switching device.
10. the high-power charger of magnetic suspension train according to claim 1 is characterized in that, the output parallel voltage-stabilizing resistance of described rectification circuit.
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| CN2011100955292A CN102157968A (en) | 2011-04-15 | 2011-04-15 | High-power charger for maglev train |
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| CN2011100955292A CN102157968A (en) | 2011-04-15 | 2011-04-15 | High-power charger for maglev train |
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| CN103812320A (en) * | 2014-02-28 | 2014-05-21 | 北京航空航天大学 | Digital power supply device for magnetic suspension molecular pump control system |
| CN104319826A (en) * | 2014-09-28 | 2015-01-28 | 株洲南车时代电气股份有限公司 | Charger for storage batteries |
| CN104426379A (en) * | 2013-08-23 | 2015-03-18 | 西门子公司 | Converter circuit and method for running converter circuit |
| CN105089365A (en) * | 2014-05-23 | 2015-11-25 | 株洲南车时代电气股份有限公司 | Device, system and method for controlling door lock |
| CN105305828A (en) * | 2014-06-26 | 2016-02-03 | 株洲南车时代电气股份有限公司 | Intelligent vehicle-mounted DC power supply applicable to multiple working modes |
| CN105592615A (en) * | 2014-10-21 | 2016-05-18 | 核工业西南物理研究院 | High-power microwave vacuum tube filament power source system and working method thereof |
| CN106300467A (en) * | 2015-05-25 | 2017-01-04 | 中车大连电力牵引研发中心有限公司 | Charger research and development platform |
| CN107248774A (en) * | 2016-03-28 | 2017-10-13 | 波音公司 | System architecture for the battery charger based on GaN base supply unit |
| CN109149687A (en) * | 2018-08-21 | 2019-01-04 | 上海广为美线电源电器有限公司 | Start the automatic control type frequency conversion charger of automobile |
| CN112636577A (en) * | 2020-11-27 | 2021-04-09 | 联合汽车电子有限公司 | PFC circuit compatible with single-phase and three-phase alternating-current input, control method and charger |
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| CN104426379B (en) * | 2013-08-23 | 2018-10-12 | 西门子公司 | Converter circuit and method for running this kind of converter circuit |
| CN104426379A (en) * | 2013-08-23 | 2015-03-18 | 西门子公司 | Converter circuit and method for running converter circuit |
| CN103812320A (en) * | 2014-02-28 | 2014-05-21 | 北京航空航天大学 | Digital power supply device for magnetic suspension molecular pump control system |
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| CN105089365B (en) * | 2014-05-23 | 2017-11-14 | 株洲南车时代电气股份有限公司 | Door head lock control device, system and method |
| CN105305828A (en) * | 2014-06-26 | 2016-02-03 | 株洲南车时代电气股份有限公司 | Intelligent vehicle-mounted DC power supply applicable to multiple working modes |
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| CN106300467A (en) * | 2015-05-25 | 2017-01-04 | 中车大连电力牵引研发中心有限公司 | Charger research and development platform |
| CN107248774A (en) * | 2016-03-28 | 2017-10-13 | 波音公司 | System architecture for the battery charger based on GaN base supply unit |
| CN107248774B (en) * | 2016-03-28 | 2019-08-06 | 波音公司 | System architecture for the battery charger based on GaN base power supply device |
| CN109149687A (en) * | 2018-08-21 | 2019-01-04 | 上海广为美线电源电器有限公司 | Start the automatic control type frequency conversion charger of automobile |
| CN112636577A (en) * | 2020-11-27 | 2021-04-09 | 联合汽车电子有限公司 | PFC circuit compatible with single-phase and three-phase alternating-current input, control method and charger |
| WO2022110891A1 (en) * | 2020-11-27 | 2022-06-02 | 联合汽车电子有限公司 | Pfc circuit with single-phase and three-phase alternating-current inputs being compatible, and control method and charger |
| CN112848914A (en) * | 2021-03-27 | 2021-05-28 | 湖南凌翔磁浮科技有限责任公司 | High-speed magnetic suspension controller and control system |
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Application publication date: 20110817 |