CN105450010B

CN105450010B - The DC DC converters of magnetron+coaxial electronic transformer

Info

Publication number: CN105450010B
Application number: CN201410733807.6A
Authority: CN
Inventors: 王勇
Original assignee: Shenzhen Gaoling Technology Co Ltd
Current assignee: Shenzhen Gaoling Technology Co Ltd
Priority date: 2014-12-04
Filing date: 2014-12-04
Publication date: 2018-01-23
Anticipated expiration: 2034-12-04
Also published as: CN105450010A; WO2016086875A1

Abstract

The key of the present invention is：Using high frequency power switching device of the magnetron as DC D/C power converters, working frequency is up to multiple gigahertz；Simultaneously using voltage changer of the hyperfrequency high-power transformer of coaxial configuration as DC DC converters, both cooperate, it is possible to achieve frequency is up to gigabit level, power reaches the other DC D/C powers converter of MW class.

Description

The DC-DC converter of magnetron+coaxial electronic transformer

Technical field

The present invention relates to DC-DC converter.More particularly to the DC-DC converter of magnetron+coaxial electronic transformer.

Background technology

Super high power DC-DC power source converter has become the developing direction of secondary power supply industry, and Switching Power Supply is efficient The technical foundation of rate secondary power supply.Theoretically, its higher volume can of the working frequency of Switching Power Supply is smaller, and efficiency is just Can be higher.But in practical application due to the high frequency Kelvin effect of conductor, the approach effect of coil, high-frequency circuit distributed constant etc. The influence of many factors, limits the raising of Switching Power Supply working frequency, hyperfrequency super high power electronics in numerous restraining factors Transformer is the factor of most critical.

High-frequency electronic transformer be still the design theory of continuing to use traditional transformer, although on winding construction, it is high Many improvement are all carried out in terms of frequency material, but its general principle does not change.It is mainly characterized by：

1st, primary coil is still cluster type coiling (the plane winding for including flat surface transformer)；

2nd, the electric current of armature winding is completely in phase；

3rd, the magnetic flux of transmission energy and the magnetic flux for producing electromagnetic interference are same magnetic fluxs.

Above-mentioned technical characterstic determines that the working frequency of high-power high-frequency electronic transformer is difficult to surmount current kilohertz Rank (actual operating frequency is limited in below 300kHz)；And efficiency of transmission, power density are all barely satisfactory；Particularly electromagnetism Interference increases in proportion with the increasing of transimission power；The superelevation frequency switching circuit of super high power simultaneously, due to device Also it is difficult to the needs for meeting practical application, these technical bottlenecks seriously constrain the application of Switching Power Supply.

The content of the invention

The key of the present invention is：Using high frequency power switching device of the magnetron as DC-DC power source converter, work Frequency reaches as high as multiple gigahertz；Simultaneously using the hyperfrequency high-power transformer of coaxial configuration as DC-DC converter Voltage changer, both cooperate, it is possible to achieve frequency is up to gigabit level, power reaches the other DC-DC power source of MW class and become Parallel operation.

Traditional transformer is all to secondary windings transmission energy, these changes by the outside resultant flux of armature winding The working frequency of depressor can not break through a megahertz rank, while with the increasing of power, also same level increases electromagnetic interference.Again divide The relative position of cloth armature winding and secondary windings, and the direction of each circle current in wire in armature winding is controlled, overturn biography System transformer, to the pattern of secondary windings transmission energy, utilizes the turn-to-turn magnetic flux of armature winding by the resultant flux of armature winding To secondary windings transmission energy --- the transmission of i.e. primary and secondary winding energy is carried out between the magnetic flux inside winding, and is produced The outside resultant flux of raw electromagnetic interference is not involved in energy transmission completely, and it is complete with two magnetic fluxs of electromagnetic interference to realize energy transmission Fully stripped, while effectively lifting transformer efficiency of transmission and power density, fundamentally weaken and suppression electromagnetic interference Produce.

High-frequency electronic transformer is made using coaxial configuration, the inner wire 2-31 of concentric conductor be transformer it is primary around Group, outer conductor 2-32 are the secondary windings of transformer, parallel distribution between wire；Control the wiring of armature winding so that adjacent to lead The anti-phase of line, it is possible to ensure that the resultant flux 2-34 between wire mutually strengthens, outside magnetic flux is cancelled out each other；Due to secondary Winding is coaxially distributed in outside armature winding and armature winding close coupling, utilizes the turn-to-turn resultant flux 2-34 of wire to transmit energy Amount, outside resultant flux is unrelated with energy transmission and cancels out each other.Can be more in the intercalation screen layer 2-35 of winding assembly Effectively suppress the electromagnetic interference significantly weakened；Screen layer is designed with Insulating gap 2-36, prevents closure vortex； Screen layer is designed with electrical terminal, is grounded as the case may be during practical application or vacantly.

Coaxial transformer is set up and designed based on Distribution parameter theory, so the height of working frequency is direct Determine the actual performance of coaxial transformer.1MHz wavelength is 300m, and the coaxial transformer of such long wavelength can only be " in water Month ", and 1MHz has been the upper limit of current high-power switchgear power supply, so high-power, ultra-high frequency (should reach 1,000MHz More than) oscillating circuit (or on-off circuit) be coaxial transformer can practical application key problem in technology.

Supply convertor is a complete circuit system, its DC power supply circuit, vibrates (switch) circuit, power feed Several main functional circuits such as circuit, voltage changer, rectifier, wave filter need co-ordination.Wherein DC power supply circuit, The technology and device of the circuits such as rectifier, wave filter are relatively ripe, can be with high-power oscillating circuit and voltage changer Technology restriction is there's almost no in the operating frequency range reached；High-power superelevation frequency oscillator circuit, voltage changer (high-frequency electrical Sub- transformer), the design of the high-power feed circuit of hyperfrequency and technique be hyperfrequency large power supply converter technology bottle Neck.By the design of magnetron and shaft power source transformer organically being integrated into one, can effectively solve above-mentioned technology bottle Neck.

Magnetron is hyperfrequency high-power switch device the most frequently used at present, is characterized in big power, efficiency high, work electricity Force down, size is small, in light weight, cost is low.Operating frequency range in 250MHz between 120GHz, pulse power from tens watts to Tens megawatts, the life-span is up to tens of thousands of hours.

The integration of coaxial manetron and coaxial UHF Power transformer should be the optimal of super high power supply convertor Selection, 915MHz or 2.45GHz the two frequencies are also very suitable for the use of supply convertor.915MHz wavelength about 328mm, 2.45GHz wavelength about 122mm, so short wavelength can utilize Distribution parameter theory completely, by transformer and filter circuit Volume make it is very small, it might even be possible to whole high-frequency circuits are built in coaxial transformer intracavitary completely, so as to realizing Super high power minimizes electromagnetic interference while transmission.

Brief description of the drawings

Fig. 1：The magnetic flux distribution schematic diagram of turn-to-turn anti-phase winding

2-31 --- single turn wire；

2-33 --- single turn wire magnetic flux；

2-34 --- resultant flux between wire.

Fig. 2：Using concentric conductor structure and the magnetic flux distribution schematic diagram of armature winding turn-to-turn anti-phase

2-31 --- concentric conductor inner wire (armature winding)；

2-32 --- concentric conductor outer conductor (secondary windings)；

2-33 --- single turn wire magnetic flux；

2-34 --- resultant flux between wire.

Fig. 3：Coaxial configuration transformer device structure schematic diagram

2-31 --- concentric conductor inner wire (armature winding)；

2-32 --- concentric conductor outer conductor (secondary windings).

Fig. 4：Coaxial configuration high-power high-frequency electronic transformer radial cross section with screen layer

2-31 --- concentric conductor inner wire (armature winding)；

2-32 --- concentric conductor outer conductor (secondary windings)；

2-33 --- single turn wire magnetic flux；

2-34 --- resultant flux between wire；

2-35 --- interlayer screen layer；

2-36 --- screen layer Insulating gap.

Fig. 5：The functional-block diagram of DC-DC conversion electric powers

1 --- DC power supplies；

2 --- the integrated microwave wave band supply convertor of coaxial transformer+magnetron；

2-1 --- high-frequency switch circuit；

2-2 --- high frequency feed circuit；

2-3 --- high frequency transformer；

2-4 --- high-frequency rectification circuit；

2-5 --- filter circuit；

3 --- DC dc sources.

Embodiment

The hyperfrequency high-power transformer of magnetron and coaxial configuration is combined into one, makes 2.45GHz/300kW's DC-DC power source converter.

High-power high-frequency electronic transformer is made using coaxial configuration, its structure is cylindric --- concentric conductor distribution Radial section is circular, and the interlayer of winding embeds screen layer, and screen layer is provided with the gap of insertion, prevents screen layer vertically Induced-current forms circulation, and screen layer is single-ended to have wire to pick out, and supply used time ground connection uses.

By the use of concentric conductor cored wire as transformer armature winding, using the outer conductor of concentric conductor as transformer Secondary windings, the suitable mode of connection is taken, ensure adjacent wires anti-phase in armature winding, it is possible to make full use of primary The performance that the turn-to-turn magnetic flux of winding mutually strengthens improves the efficiency of energy transmission between primary and secondary winding to greatest extent.

Now the turn-to-turn magnetic flux inside armature winding mutually strengthens, and is cancelled out each other in the outside resultant flux of cylindrical radial several It is zero, the effect of screen layer in addition ensures that its stray radiation is almost nil, therefore electromagnetic interference can be preferably minimized.

The output end of magnetron is directly connected with the inner wire (armature winding of transformer) of coaxial transformer, when When 2.4GHz high-power high-frequency electric current flows in the armature winding of coaxial transformer, with production around winding conducting wire The magnetic flux of raw alternation, the secondary conductor cutting that the alternating flux is coaxially distributed with armature winding, produces sense in secondary conductor Raw electric current, after the electric current is by the rectification of secondary circuit, filtering, it is transformed into D/C power output.

Claims

1. the DC-DC converter of magnetron+coaxial electronic transformer, it is characterized in that：Using magnetron as DC-DC converter High frequency power switching device, working frequency reach as high as multiple gigahertz；Simultaneously using the high-power change of hyperfrequency of coaxial configuration Voltage changer of the depressor as DC-DC converter, the hyperfrequency high-power transformer of the coaxial configuration is concentric conductor system The powerful coaxial electronic transformer of hyperfrequency of work, the inner wire of the concentric conductor is the first of the coaxial electronic transformer Level winding, the outer conductor of the concentric conductor are the secondary windings of the coaxial electronic transformer, and parallel distribution between wire；Will Armature winding of the output end of magnetron directly with the coaxial electronic transformer is connected, and both cooperate, it is possible to achieve frequency Rate is up to gigabit level, power reaches the other DC-DC converter of MW class.

2. according to the DC-DC converter of the magnetron described in claim 1+coaxial electronic transformer, it is characterized in that：According to ampere Law and relevant electromagnetic principles, electric current in the primary and secondary winding of coaxial electronic transformer described in reasonable layout and setting winding Flow direction, ensure the anti-phase of adjacent wires in armature winding so that the circle inside coaxial electronics primary winding Between resultant flux mutually strengthen, and outside resultant flux is cancelled out each other；In effectively lifting transformer efficiency of transmission and power density While, electromagnetic interference caused by reduction transformer is external, then embedded screen layer can more efficiently reduce the outside of residual Electromagnetic radiation caused by resultant flux.

3. according to the DC-DC converter of the magnetron described in claim 1+coaxial electronic transformer, it is characterized in that：Magnetic control plumber Working frequency scope is in 250MHz between 120GHz, and pulse power is from tens watts to tens megawatts, and the life-span is up to tens of thousands of hours.

4. according to the DC-DC converter of the magnetron described in claim 1+coaxial electronic transformer, it is characterized in that：Work as 2.4GHz High-power high-frequency electric current when flowed in the armature winding of coaxial electronic transformer, supervened around winding conducting wire The magnetic flux of alternation, the secondary windings cutting that the alternating flux is coaxially distributed with armature winding, produces in secondary windings and inducts Electric current, after the electric current is by the rectification of secondary circuit, filtering, it is transformed into D/C power output.