CN103259345B - A kind of contactless power supply system of travelling car of parallel resonance series compensation - Google Patents
A kind of contactless power supply system of travelling car of parallel resonance series compensation Download PDFInfo
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- CN103259345B CN103259345B CN201310187371.0A CN201310187371A CN103259345B CN 103259345 B CN103259345 B CN 103259345B CN 201310187371 A CN201310187371 A CN 201310187371A CN 103259345 B CN103259345 B CN 103259345B
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Abstract
A contactless power supply system for the travelling car of parallel resonance series compensation, is made up of soft switching power, non-contact power former limit circuit, secondary electricity pickup circuit.Described Switching Power Supply is soft switching power, by rectifier bridge, and the compositions such as filter circuit, EMI circuit, inverter bridge, Switching Power Supply resonant circuit and high frequency transformer.Non-contact power former limit circuit by filter inductance 14, the compositions such as parallel resonance electric capacity 16 and non-contact power former limit circuit cable 4; Noncontact secondary electricity pickup circuit, is made up of electricity pickup and regulator rectifier circuit etc.The advantage of this power supply contactless system with the IGBT of low capacity by the effect of parallel resonance, can produce the primary current 22 more much bigger than the output circuit 20 of soft switching power 1, reduce the cost of soft switching power, improve the efficiency of system.Adopt soft switching power, make the voltage outputting to high frequency transformer close to sinusoidal wave, decrease the cost of filter.<!--1-->
Description
Technical field
The present invention relates to a kind of contactless power supply system adopting series parallel resonance method to form, the travelling car belonging to non-contact power field powered, charging device.
Background technology
In order to make travelling car can be used in various adverse circumstances and particular surroundings, breaking away from and using charger charging, changing the trouble such as battery and mobile device traction power line, the demand of non-contact power technology (CPS) gets more and more.At present, contactless power supply device is progressively practical and come into our daily life gradually.Realize transmitting non-contact electric energy technology and mainly comprise three kinds of forms: 1, inductively type; 2, radio acceptance type; 3, resonance type.
Travelling car is powered motor-driven carrier system (EMS, Electrified Monorail System) be also referred to as electric monorail conveying system, it is the automated system that there is conveying, transport goods, with machinery, electrically, the technology such as information combines, be widely used in that automobile, metallurgy, electronic product etc. are in enormous quantities, on the flow production line of multi items, also play an important role in extensive storage process in addition.
Travelling car has three kinds of supply power modes at present, and sliding contacting mode, cable-pulling chain mode, battery charge.The shortcoming that these modes have is, needs to safeguard, operating cost is higher, the reliability under cleannes height and inflammable and explosive environment, fail safe deficiency.Adopt non-contact power mode can imitate the shortcoming overcoming above-mentioned three kinds of supply power modes.The advantage of non-contact power is: 1) high mobility, flexibility, to the speed of motor-driven carrier and range ability unrestricted, be applicable to the circuit that layout is more complicated simultaneously.2) operating cost is low, and cost once drops into, and can reach almost non-maintaining.3) fail safe is high: do not have electrical contact and nuditing wire, avoids the potential safety hazard such as electric spark and electric shock, can be used for various adverse circumstances and particular surroundings.4) environmental friendliness: noiseless and dust release, eliminate battery relevant environment and pollute, green safety.5) reliability is high: system is without physical friction, and eliminate physical deterioration and chemical corrosion, reliability service is guaranteed.
Non-contact power of the present invention belongs to inductively type, its principle is first siding ring certain distance adjacent with second siding ring mainly, high frequency AC great current is added in first siding ring, be that medium induces electromotive force at second siding ring with electromagnetic field, through over commutation, filtering, voltage stabilizing, power for mobile terminal or charge, thus realizing delivery of electrical energy.First siding ring can be laid along the orbit of travelling car, or is laid on the fixing charge position of travelling car, and secondary coil, around in the FERRITE CORE of an E type or the shape such as U-shaped, is arranged on travelling car.In order to reduce costs and raise the efficiency, the method that present invention employs parallel resonance series compensation forms contactless power supply system.
Summary of the invention
In order to play the advantageous characteristic of non-contact power, expand its scope of application, the problem to be solved in the present invention reduces the cost of contactless power supply system, improves its delivery of electrical energy efficiency.Technical scheme of the present invention is as follows:
A contactless power supply system for electronic travelling car, (is comprised optional high-frequency isolation transformer by soft switching power, non-contact power former limit circuit (forming by former limit compensating circuit with along the cable of the former limit circuit that travelling car orbit or charge position lay), non-contact power secondary circuit forms.
Soft switching power of the present invention is primarily of compositions such as rectifier bridge, filter circuit, EMI circuit, inverter bridge, Switching Power Supply series resonance inductor, Switching Power Supply series resonant capacitance and high-frequency isolation transformer, and its effect is that the high frequency electric source produced needed for the circuit of non-contact power former limit also plays buffer action.Adopt soft switching power, not only increase the efficiency of Switching Power Supply, also make the input and output voltage of high frequency transformer close to sinusoidal wave, simplify the structure of the filter needed for the circuit of non-contact power former limit, reduce system cost, improve the efficiency of system.
The magnetic core of high-frequency isolation transformer can be considered to select Superfine crystal material and ferrite, and coil adopts enamel-cover twisted wire (Litz-wire), to overcome kelvin effect, and Loss reducing.
The non-contact power former limit circuit of native system, the cable of former limit circuit is the load of former limit circuit, and the orbit along travelling car lays, or the fixing charge position of the travelling car that is laid in.The antiresonant circuit in series of the cable of parallel resonance electric capacity, current limliting small inductor and additional inductor/building-out capacitor and former limit circuit.Wherein additional inductor/building-out capacitor is Alternative devices.When the cable of former limit circuit is shorter, its inductance is less, then need additional inductor of connecting, make it equal with the capacitive reactance of parallel resonance electric capacity 16 with the induction reactance of former limit cable series connection, meet parallel resonance condition; When the cable of former limit circuit is long, its inductance is comparatively large, then need series compensation capacitance, offset the induction reactance of a part of former limit cable, meet parallel resonance condition.When the cable length of former limit circuit is very long, be limited to the withstand voltage of building-out capacitor and cost, the mode of multiple building-out capacitor of connecting can be adopted, reach condition of resonance.Current limliting small inductor stops higher harmonic current to inject parallel resonance electric capacity, to protect parallel resonance electric capacity not overcurrent.The effect of filter inductance is the harmonic wave of filtering Switching Power Supply, reduces the voltage harmonic be added on parallel resonance electric capacity, current limliting small inductor branch road.The change of the cable data of the former limit circuit brought by load, and temperature cause parallel resonance electric capacity, building-out capacitor the change etc. of capacitance, make circuit depart from resonance point, the frequency by automatic regulating switch power supply solves.
Because the former limit circuit of contactless power supply system needs high frequency big current, parallel resonance is have employed when system, its objective is with the inductive current in the cable of the condenser current compensation former limit circuit in parallel resonance electric capacity, for the phase relation of each electric current of antiresonant circuit, the phase of capacitance current and inductive current is close to 180 DEG C, under the condition of resonance, although the current ratio in the cable of former limit circuit and parallel resonance electric capacity is larger, the output current of Switching Power Supply and the output voltage same-phase of Switching Power Supply, it is the active current that this system consumes, be far smaller than the current value required for cable of former limit circuit.The power designs that the capacity of Switching Power Supply can consume according to load and system.The capacity of switching tube, high-frequency isolation transformer and filter inductance etc. is reduced greatly, and system cost declines to a great extent.Adjust design parameters, make the inductive current in the cable of the electric current of parallel resonance electric capacity, former limit circuit much larger than the output current of Switching Power Supply, just when Switching Power Supply exports smaller electric current, the primary current of very large contactless power supply system can be produced, to induce larger power.
The non-contact power secondary circuit of native system is made up of electricity pickup and rectification, filtering, voltage stabilizing circuit.The rectifier bridge be made up of Ultrafast recovery diode received by electricity pickup coil through pi type filter.Pi type filter is made up of inductance, electric capacity and electric capacity, with filtering high-frequency harmonic.From the direct current that rectifier bridge exports, through inductance, capacitor filtering, then obtain the higher direct voltage of quality, for load through voltage stabilizing circuit.
The present invention is by the effect of parallel resonance, electric current needed for the former limit of larger non-contact power can be produced, even can produce the non-contact power primary current of the large several times of nominal current of IGBT more used than soft switching power, and the output current of soft switching power is only smaller active current.Significantly reduce the cost of soft switching power, high-frequency isolation transformer and filter inductance, improve the efficiency of system.Owing to adopting soft switching power, make the voltage outputting to high frequency transformer close to sinusoidal wave, the design of filter is simplified, even only just can obtain good sine wave with filter inductance, reduce its cost and energy loss.
Accompanying drawing explanation
Fig. 1 is travelling car non-contact power overall structure figure of the present invention
Fig. 2 is the structure diagram of soft switching power.
Fig. 3 is non-contact power former limit circuit diagram.
Fig. 4 is the vectogram that non-contact power former limit circuit diagram parallel resonance is described.
Fig. 5 is non-contact power secondary circuit figure.
In figure: 1 soft switching power, 2 high-frequency isolation transformer, 3 non-contact power former limit compensating circuits, 4 non-contact power former limit circuit cable, 5 non-contact power secondary circuits, 6 mains supplies, 7 rectifier bridges, 8 filter circuits, 9EMI circuit, 10 inverter bridge, 11IGBT, 12 Switching Power Supply series resonance inductors, 13 Switching Power Supply series resonant capacitance, 14 filter inductances, 15 current limliting small inductors, 16 parallel resonance electric capacity, 17 additional inductors, 18 building-out capacitors, the electric current of 19 parallel resonance electric capacity, the output current of 20 Switching Power Supplies, the output voltage of 21 Switching Power Supplies, inductive current in the cable 4 of 22 former limit circuit, 23 electricity pickup coils, 24, 26 pi type filter electric capacity, 25 pi type filter inductance, 27 secondary circuit rectifier bridges, 28 secondary circuit filter inductances, 29 secondary circuit filter capacitors, 30 voltage stabilizing circuits.
Embodiment
Specific embodiments of the invention are described in detail below by way of technical scheme and accompanying drawing.
The present embodiment is the travelling car contactless power supply system of a 10kW, is mainly divided into soft switching power, non-contact power former limit circuit, non-contact power secondary circuit.
Soft switching power as shown in Figure 1, power acquisition three-phase 380 volts of AC power 6, by rectifier bridge 7, the compositions such as filter circuit 8, EMI circuit 9, inverter bridge 10, Switching Power Supply series resonance inductor 12, Switching Power Supply series resonant capacitance 13 and high frequency transformer 2, its effect is that the high frequency electric source produced needed for the circuit of non-contact power former limit also plays buffer action.Switching Power Supply series resonance inductor 12 wherein, the resonance frequency of Switching Power Supply series resonant capacitance 13 are designed to 20kHz, the operating frequency of soft switching power is that 30kHz is adjustable, namely the working method of operating frequency higher than resonance frequency of Switching Power Supply is adopted, be the working method belonging to current continuity, be suitable for the needs of non-contact power former limit circuit.
As shown in Figure 3, in this example, filter inductance 14 adopts metal magnetic powder core to make magnetic core to non-contact power former limit circuit, does coil winding with Litz line.In this example, the current design of non-contact power former limit circuit is effective value 100A, and frequency is 30kHz.The output voltage of high frequency transformer secondary side, after filtering after inductance 14 filtering, is the sine wave of effective value 180V.The capacity of parallel resonance electric capacity 16 elects 3 μ F as, elects 0.5 μ H as with the current limliting small inductor 15 of parallel resonance capacitances in series.In order to the validity of invention is described, the length of non-contact power former limit circuit cable 4 have selected two kinds: 20 meters and 40 meters, be arranged in automatic carriage run track by.Length is the actual measurement inductance of 20 meters is 9.7 μ H, when the operating frequency of Switching Power Supply is 29.5kHz, reaches resonance condition.In this case, the additional inductor 17 in accompanying drawing 3, building-out capacitor 18 all need not add.Length is the cable actual measurement inductance of 40 meters is 19.3 μ H, at this moment the building-out capacitor 18 in accompanying drawing 3 is needed to add, to make the series inductance of building-out capacitor 18 and former limit circuit cable 4 be 9.7 μ about H, when the operating frequency of Switching Power Supply is 29.4kHz, reach resonance condition.In actual applications, capacitance of the inductance of former limit circuit cable 4, parallel resonance electric capacity 16 and additional capacitor 18 etc. has certain change by the impact of environment etc., Switching Power Supply in this example automatically can detect former limit circuit and whether be operated in resonance condition, and adjustment operating frequency makes circuit working in resonance condition at any time.In order to make also can to work close to resonance condition, can the power tube IGBT of Switching Power Supply be selected larger.
As shown in Figure 5, the inductance 23 in figure is electricity pickup coil to non-contact power secondary circuit, forms by E type ferrite magnetic core with around the winding on E-type magnetic core center pillar.Because the voltage waveform on former limit is better, the induction voltage waveform of actual measurement electricity pickup coil 23 is smooth sine wave, so the output of electricity pickup coil 23 directly connects the rectifier bridge 27 be made up of Ultrafast recovery diode, be filtered into direct current through inductance 28, electric capacity 29, then export constant DC power supply for travelling car through voltage stabilizing circuit 30.
Claims (2)
1. a contactless power supply system for the travelling car of parallel resonance series compensation, this contactless power supply system comprises high-frequency soft switch power supply (1), non-contact power former limit circuit (3) and non-contact power secondary circuit (5), it is characterized in that,
Non-contact power former limit circuit is antiresonant circuit, high-frequency soft switch power supply is added to this antiresonant circuit as power supply by a high-frequency inductor filter, described high-frequency soft switch power acquisition three-phase 380 volts of AC power (6), comprise rectifier bridge (7), filter circuit (8), EMI circuit (9), inverter bridge (10), Switching Power Supply series resonance inductor (12), Switching Power Supply series resonant capacitance (13) and high frequency transformer (2); The antiresonant circuit in series on parallel resonance electric capacity (16), current limliting small inductor (15) and additional inductor (17)/building-out capacitor (18) and former limit circuit cable (4); When non-contact power former limit circuit cable is long, its inductance is comparatively large, then a building-out capacitor of at least connecting, offsets the induction reactance of a part of circuit cable, meet parallel resonance condition;
Non-contact power secondary circuit is made up of electricity pickup coil, rectifier bridge, filter circuit, voltage stabilizing circuit;
Electricity pickup coil is inductance, forms primarily of E type ferrite magnetic core with around the winding on E-type magnetic core center pillar; The output of described electricity pickup coil directly connects the rectifier bridge (27) be made up of Ultrafast recovery diode, is filtered into direct current, then exports constant DC power supply for travelling car through voltage stabilizing circuit (30) through inductance (28), electric capacity (29).
2. the contactless power supply system of travelling car according to claim 1, is characterized in that, described soft switching power operating frequency range is 10kHz-60kHz.
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| CN201310187371.0A CN103259345B (en) | 2013-05-18 | 2013-05-18 | A kind of contactless power supply system of travelling car of parallel resonance series compensation |
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| CN201310187371.0A CN103259345B (en) | 2013-05-18 | 2013-05-18 | A kind of contactless power supply system of travelling car of parallel resonance series compensation |
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| CN103259345B true CN103259345B (en) | 2015-10-28 |
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Families Citing this family (9)
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| CN103414259B (en) * | 2013-08-23 | 2015-04-22 | 广西电网公司电力科学研究院 | Control method for current-mode IPT system efficiency optimizing control circuit |
| CN104578439B (en) | 2013-10-21 | 2018-10-09 | 台达电子企业管理（上海）有限公司 | Device for wireless charging link |
| CN103633747B (en) * | 2013-11-12 | 2017-02-15 | 天津工业大学 | Electromagnetic resonance wireless power supply system for subway |
| US9923584B2 (en) | 2015-09-03 | 2018-03-20 | Qualcomm Incorporated | Rectifiers for wireless power transfer with impedance inverting filters for reduced electromagnetic interference |
| CN106411105B (en) * | 2016-06-17 | 2019-03-15 | 安徽长远绿色能源有限公司 | A kind of soft switch circuit topology based on capacitor charge and discharge |
| DE102016219491A1 (en) * | 2016-10-07 | 2018-04-12 | Bayerische Motoren Werke Aktiengesellschaft | Coil unit for inductive charging of a vehicle |
| CN106849369B (en) * | 2017-04-05 | 2024-05-03 | 贵州电网有限责任公司电力科学研究院 | Energy taking device and method for overhead lightning protection ground wire of power transmission line based on CT electricity taking |
| CN109802498B (en) * | 2019-02-22 | 2022-03-25 | 上海桁壹高科技有限公司 | Power supply system, method and device based on radio frequency electromagnetic wave energy collection |
| CN112994487B (en) * | 2021-02-07 | 2022-05-20 | 重庆中车长客轨道车辆有限公司 | Direct current power supply device |
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| CN102157973A (en) * | 2011-04-08 | 2011-08-17 | 东南大学 | High-power induction charging converter of electric vehicle and control method thereof |
| CN102611206A (en) * | 2012-03-13 | 2012-07-25 | 崔玉龙 | Kilowatt-level wireless electric energy transmitting device |
| CN102969801A (en) * | 2012-11-01 | 2013-03-13 | 重庆大学 | Current type wireless power supply system load identification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11178248A (en) * | 1997-12-05 | 1999-07-02 | Shinko Electric Co Ltd | Power circuit for non-contact power supply |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157973A (en) * | 2011-04-08 | 2011-08-17 | 东南大学 | High-power induction charging converter of electric vehicle and control method thereof |
| CN102611206A (en) * | 2012-03-13 | 2012-07-25 | 崔玉龙 | Kilowatt-level wireless electric energy transmitting device |
| CN102969801A (en) * | 2012-11-01 | 2013-03-13 | 重庆大学 | Current type wireless power supply system load identification method |
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