CN106255248A

CN106255248A - A kind of railway holdfast heater

Info

Publication number: CN106255248A
Application number: CN201610680999.8A
Authority: CN
Inventors: 李志兵
Original assignee: Sichuan Huafu Railway Equipment Co Ltd
Current assignee: Sichuan Huafu Railway Equipment Co Ltd
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2016-12-21
Anticipated expiration: 2036-08-12
Also published as: CN106255248B

Abstract

The invention discloses a kind of railway holdfast heater, it includes high frequency generator circuit and electromagnetic switching device；High frequency generator circuit includes: current rectifying and wave filtering circuit, inverter circuit and output; electromagnetic switching device; it is mainly made up of cable, adapter and converter section; converter section includes shell, coil, magnetic conductor, protective layer and packed layer; protective layer is overlying on magnetic conductor; described protective layer is wound with described coil; described magnetic conductor, protective layer and coil are positioned in shell; it is filled with packed layer between described coil and shell; the two ends of magnetic conductor stretch out in described shell; described coil is connected with cable by connector, and connector is positioned in described shell；Output is provided with interface, for using aviation plug or snap joint to be connected with the cable of electromagnetic switching device.This one railway holdfast heater, is provided simultaneously with electromagnetic induction heating and electric energy transmission or the function converted, and its sensing heats is ideal through actual verification.

Description

A kind of railway holdfast heater

Technical field

The present invention relates to electromagnetic induction heating technology field, specifically relate to a kind of railway holdfast heater.

Background technology

Electromagnetic induction heating derives from the electromagnetic induction phenomenon that faraday finds, i.e. the electric current of alternation produces sense in the conductor Induced current, thus cause conductor temp.-elevating.Since find electric current by after wire generation heat effect, the most just occur in that much from Thing research manufactures the inventor of electric heater.1890, Sweden technical staff has invented First induction melting furnace-open flume type core Stove；1893, the U.S. occurred in that electric iron blank；1909, the appearance of electric stove achieved the process being converted into heat energy from electric energy； 1916, American has invented locked groove had core stove, electromagnetic induction technology to progress into practical stage.

Authorization Notice No. is CN202969179U, and authorized announcement date is that the Chinese patent literature on June 5th, 2013 discloses A kind of concrete sleeper electric heating changes windlass, and including electric cabinet and electromagnetic induction heating head, described electric cabinet is provided with connector, described Electromagnetic induction heating head is connected with electric cabinet by connector, and described electromagnetic induction heating head is divided into heating part and connecting portion, institute Stating connecting portion to be connected with electric cabinet, described heating part is followed successively by supporting layer, thermal insulation layer, electromagnetic induction coil layer and guarantor from inside to outside Sheath, described heating part is provided with insertion hole, and described supporting layer surrounds heating chamber along inserting hole inside heating part.This patent uses The mode of electromagnetic induction heating, to anchor bolt heat treated, improves work efficiency, and the head that works can be repeatedly used for a long, And simple in construction, it is easy to manufacture, reinstall new anchor bolt speed fast, easy to use, it is ensured that safety of railway traffic.

Meanwhile, Publication No. 201312406, publication date is that in JIUYUE, 2009 Chinese patent literature of 16 days discloses one High frequency generator, occurs including common mode filtering circuit, rectification circuit, power amplification circuit, transforming circuit, triggering circuit, high frequency Circuit, DC output circuit, wherein, common mode filtering circuit, rectification circuit, power amplification circuit, transforming circuit are sequentially connected with, and become The voltage signal output end of volt circuit connects triggering circuit, the feeder ear of high frequency generation circuit respectively, triggers the triggering letter of circuit Number outfan connects the triggering signal input part of high frequency generation circuit, and the signal output part of high frequency generation circuit connects direct current output The signal input part of circuit, it is characterised in that: described DC output circuit includes two and plural patch capacitor, respectively Patch capacitor is parallel with one another.DC output circuit is designed as two and two or more patch capacitor parallel with one another, Ke Yigen Selecting to connect one, two or more patch capacitors according to the output needed, output has extensibility.

As above, described in documents, there is a variety of high frequency generator circuit structure, but be applied to In electromagnetic induction heating technology field, it is complicated all to there is circuit structure in existing high frequency generator circuit, limited reliability, uses effect The shortcomings such as rate is the highest.

Further, the concrete sleeper electric heating with above-mentioned patent documentation as representative changes windlass, and it is only capable of playing heat effect, nothing Method is provided simultaneously with electromagnetic induction heating and electric energy transmission or the function converted；Meanwhile, in actual application, with above-mentioned patent Document is the prior art of representative, and its heats is not ideal enough.

Summary of the invention

It is contemplated that for the defect existing for above-mentioned prior art and deficiency, it is provided that a kind of railway holdfast adds hot charging Putting, alternating current or DC inverter can be become high-frequency alternating current by the present invention, and circuit design is succinct, reliable and stable, uses digital Signal processing, circuit uses flexibly, and efficiency is high；Meanwhile, the present invention be provided simultaneously with electromagnetic induction heating and electric energy transmission or The function converted, and its sensing heats is ideal through actual verification.

The present invention realizes by using following technical proposals:

A kind of railway holdfast heater, it is characterised in that: include high frequency generator circuit and electromagnetic switching device；Described High frequency generator circuit include: current rectifying and wave filtering circuit, inverter circuit and output, its circuit connecting relation is: rectifying and wave-filtering electricity Road is connected to civil power, and the positive and negative two ends that export of current rectifying and wave filtering circuit are parallel to anode and the negative terminal of inverter circuit, and inverter circuit is with defeated Go out connected；Described current rectifying and wave filtering circuit for being converted into DC voltage by the alternating voltage of input, and supply inverter circuit and make With；Described inverter circuit for being converted into the alternating voltage of high frequency by DC voltage；Described electromagnetic switching device, it is main Being made up of cable, adapter and converter section, described converter section includes shell, coil, magnetic conductor, protective layer and packed layer, institute The protective layer stated is overlying on magnetic conductor, is wound with described coil, described magnetic conductor, protective layer and coil position on described protective layer In shell, being filled with packed layer between described coil and shell, the two ends of magnetic conductor stretch out in described shell, described coil Being connected with cable by connector, connector is positioned in described shell；Described output is provided with interface, is used for using aviation to insert Head or snap joint are connected with the cable of electromagnetic switching device.

Being disposed with tack coat and equal thermosphere at the position, magnetic conductor termination stretching out in shell, protective layer is positioned at equal thermosphere Outside.

The hollow being shaped as one end open of described magnetic conductor.

Described magnetic conductor is Fe-based amorphous alloy, ferrum ni-based amorphous alloy, cobalt base amorphous alloy, iron-base nanometer crystal alloy Or FERRITE CORE.

Described FERRITE CORE selects PC40, PC44 magnetic ferrite magnetic core.

The material of described protective layer is epoxy resin, rubber, pottery or bonder.

Described equal thermosphere is alumina ceramic plate.

The material of described shell is epoxy resin, glass filled nylon or plastics.

The material of described packed layer is rubber.

Described cable is two core copper cables or multicore high frequency cable；Described coil is copper cash or multicore high-frequency line.

Described current rectifying and wave filtering circuit structure uses all wave rectification or halfwave rectifier.If input voltage is DC voltage, whole Stream filter circuit can omit, it is also possible to retains.

Described inverse circuit topology structure uses half-bridge circuit or full-bridge circuit.

Described inverter circuit includes Zero-voltage switch half-bridge control circuit, described Zero-voltage switch half-bridge control circuit It is made up of power circuit, micro-control unit MCU circuit, isolated form drive circuit and operation button, described micro-control unit MCU Circuit is pressed bonded with power circuit, isolated form drive circuit and operation respectively；

Described power circuit uses linear transformer power supply or switching type power supply；

Described micro-control unit MCU circuit uses AVR or ARM single-chip microcomputer, and micro-control unit MCU circuit is used for receiving institute State the instruction of operation button, after micro-control unit MCU processing of circuit, send working signal to isolated form drive circuit；

Described isolated form drive circuit uses any one in optical coupling isolation circuit and transformer isolation circuit；

Described operation button is for modifying to circuit parameter and regulating, and sends out to micro-control unit MCU circuit Send work order.

Described inverter circuit also includes display, and described display is connected with described micro-control unit MCU circuit, Display is used for display circuit duty；Display uses LED charactron, liquid crystal numberal tube, lattice lcd screen, black-and-white crystal Screen or color LCD screen, if cancelling display, will not impact circuit work, therefore without display, or can using Display lamp replaces.

Described power circuit is that capacitance-resistance cuts ripple mu balanced circuit, is mainly cut wave circuit and storage by filtering resistance-capacitance circuit, rectification Can form by circuit, its circuit connecting relation is: filtering resistance-capacitance circuit is connected to civil power, and the output two ends of filtering resistance-capacitance circuit connect whole Stream cuts wave circuit, and rectification is cut wave circuit positive and negative output two ends and is parallel to anode and the negative terminal of energy storage circuit.

Described filtering resistance-capacitance circuit includes L pole, N pole, electric capacity C1, electric capacity C2, resistance R1, resistance R2, resistance R3 and electricity Resistance R4, L pole, N pole are connected to live wire and the zero line of civil power respectively, and electric capacity C2 and resistance R4 is parallel to L pole and two ends, N pole, electric capacity C2 Play filtering effect, resistance R4 release under powering-off state electric capacity store electric charge, resistance R1, resistance R2, resistance R3 parallel connection structure Become equivalent resistance, described equivalent resistance and electric capacity C1 RC in series resistance-capacitance circuit.Resistance R1, resistance R2, resistance R3 parallel connection structure Becoming equivalent resistance merchandiser resistance phase ratio error less, thermal diffusivity is more preferable, and electric capacity C2 is decompression capacitor, capacitive reactance Xc=1/ (2 π fc).

Described rectification cut wave circuit include Zener diode D1, Zener diode D2, full-wave rectification bridge D3, resistance R5, Resistance R6, resistance R8, resistance R9, IGCT Q1 and IGCT Q2, full-wave rectification bridge D3 exchange input two ends are connected to filter capacitance-resistance The outfan of circuit, full-wave rectification bridge D3 is output as anode and negative terminal, and Zener diode D1 and resistance R5, resistance R8 connect, surely The negative pole of pressure diode D1 connects full-wave rectification bridge D3 anode, the negative terminal of a termination full-wave rectification bridge D3 of resistance R8, IGCT Q1 Grid is connected between resistance R5, resistance R8, and IGCT Q1 anode connects the live wire one end at the exchange input two ends of full-wave rectification bridge D3, IGCT Q1 negative electrode connects the negative terminal of full-wave rectification bridge D3, and Zener diode D2 and resistance R6, resistance R9 connect, Zener diode D2 Negative pole connect full-wave rectification bridge D3 anode, resistance R9 one termination full-wave rectification bridge D3 negative terminal, IGCT Q2 grid is connected to electricity Resistance is between R6, resistance R9, and IGCT Q2 anode connects the zero line one end at the exchange input two ends of full-wave rectification bridge D3, and IGCT Q2 is cloudy Pole connects the negative terminal of full-wave rectification bridge D3.

Described energy storage circuit includes that electric capacity C3, electric capacity C4 and resistance R7, electric capacity C3 and electric capacity C4 are parallel to rectification and cut ripple The anode of circuit and negative terminal, resistance R7 release under powering-off state electric capacity store electric charge.

Operation principle: when the positive half period at alternating current puts on the live wire end at full-wave rectification bridge D3 input two ends, all-wave The output plus terminal voltage of rectifier bridge D3 begins to ramp up, when voltage rises to the pressure voltage of Zener diode D1, and Zener diode D1 Breakdown, current flowing resistance R5, resistance R8, resistance R8 two ends produce voltage so that IGCT Q1 turns on, now live wire electric current Flow to zero line by IGCT Q1, full-wave rectification bridge D3, be equivalent to electric capacity C1 and resistance R1, resistance R2, resistance R3 composition RC resistance Capacitive circuit is connected to input voltage two ends, and the voltage on live wire declines, so that the voltage of VCC is equal to the pressure of Zener diode D1 Value, thus play the effect of voltage stabilizing.In like manner, the positive half period at alternating current puts on the zero line at full-wave rectification bridge D3 input two ends During end, the output plus terminal voltage of full-wave rectification bridge D3 begins to ramp up, when voltage rises to the pressure voltage of Zener diode D2, and voltage stabilizing Diode D2 is breakdown, current flowing resistance R6, resistance R9, and resistance R9 two ends produce voltage so that IGCT Q2 turns on, now Neutral line current flows to live wire by IGCT Q2, full-wave rectification bridge D3, is equivalent to electric capacity C1 and resistance R1, resistance R2, resistance R3 Constituting RC resistance-capacitance circuit and be connected to input voltage two ends, the voltage on zero line declines, so that the voltage of VCC is equal to Zener diode The pressure voltage of D1, thus play the effect of voltage stabilizing.

Described micro-control unit MCU circuit include disconnecting switch circuit, signaling conversion circuit, voltage detecting circuit and MCU chip, its circuit connecting relation is: MCU chip respectively with disconnecting switch circuit, signaling conversion circuit and voltage detecting circuit Connect.

Described disconnecting switch circuit includes interface P1, resistance R1, resistance R2, integrated package U1 and electric capacity C1, disconnecting switch Circuit input end connects button control signal, and output connects MCU chip the 2nd pin, 2 feet of interface P1, resistance R2, the 1 of integrated package U1 Foot is connected, 1 foot of interface P1 and the 2 foot ground connection of integrated package U1, and resistance R1, electric capacity C1 series connection is followed by the positive and negative two ends in power supply, The 3 of integrated package U1,4 feet are in parallel with electric capacity C1, and the midpoint of resistance R1, electric capacity C1 series connection connects MCU chip the 2nd pin.

Described signaling conversion circuit include diode D4, diode D5, diode D6, diode D7, diode D8, two Pole pipe D9, diode D10, interface P3, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C2, electric capacity C4, described signaling conversion circuit input termination sensor signal, output connect MCU chip the 13rd, 20,21,22 pins, diode D4, diode D7, diode D9 connect, and diode D5, diode D8, diode D10 connect, diode D4, diode D5 Negative pole is connected, diode D9, the connected rear ground connection of positive pole of diode D10；Resistance R11, resistance R12 series connection after with electric capacity C2, two Pole pipe D6 is in parallel；Resistance R10, electric capacity C4 are in parallel with diode D6 after connecting；Diode D6 negative pole and MCU chip the 13rd, 20, 21,22 pins are connected；The midpoint of resistance R10, electric capacity C4 series connection is connected with MCU chip the 9th pin；Resistance R13, resistance R14 go here and there The midpoint that connection is followed by after diode D9, the negative pole of diode D10, resistance R13, resistance R14 series connection connects positive source；Interface P3 1,2 feet connect diode D4, the positive pole of diode D5 respectively；Diode D7, the positive pole of diode D9 connect MCU chip the 40th, 41, 42 pins.

Described voltage detecting circuit includes resistance R7, resistance R8, resistance R9 and electric capacity C3, and described voltage detecting circuit is defeated Enter the detected power supply of termination, output termination MCU chip the 18th pin；Resistance R7, resistance R8, resistance R9 connect, electric capacity C3 and electricity Resistance R9 is in parallel, one end ground connection of resistance R9, and the midpoint of resistance R8, resistance R9 series connection connects MCU chip the 18th pin.

Described MCU chip uses the STM32 series monolithic that ST Microelectronics produces, and chip 5,6 foot connects crystal oscillator Y1, diode D1, diode D2, the connected rear ground connection of diode D3 negative pole, positive pole is gone here and there with resistance R4, resistance R5, resistance R6 respectively Connection, resistance R4, resistance R5, the resistance R6 other end connect respectively MCU chip the 10th, 11,12 feet；The 26 of MCU chip, 29 feet connect respectively The 1 of interface P4,2 feet, the 31 of MCU chip, 37 feet be connected with 4 feet of interface P2, the 30 of MCU chip, 34,38 feet and interface P2 3 feet are connected, and 44 feet of MCU chip are connected with 2 feet of interface P2, resistance R3 with the 1 of interface P2,2 feet in parallel, the 1 and 5 of interface P2 Foot connects negative terminal and the anode of power supply respectively.

Operating process: after power on circuitry, micro-control unit MCU circuit is in holding state, and power supply indicator D1 is bright.When connecing When mouth P1 receives high level, single-chip microcomputer enters program work, and lamp diode D3 is bright for running status, the 1 of interface P4,2 feet outputs Square wave, two square wave phase differences are 180 degree, and square wave sends into isolated form drive circuit.Sensor acquisition signal feeds back to microcontroller list Unit's MCU circuit interface P3 foot.It is bright that micro-control unit MCU circuit feeds back display lamp diode D2 after obtaining signal, and according to feedback Signal Regulation PWM1 and the dutycycle of PWM2 and frequency, thus realize power adjustments and phase adjusted.

Described integrated package U1 specifically refers to the chip that model is stm32f101, stm32f301 or stm32f401.

Described isolated form drive circuit is mainly by drive circuit, signal isolation circuit, level shifting circuit and protection Circuit forms, wherein: drive circuit input is connected with signal source, and the outfan of drive circuit and signal isolation circuit Input connects, and the outfan of signal isolation circuit is connected with the input of level shifting circuit, the output of level shifting circuit End is connected with protection circuit；The ground wire of signal source is connected with the ground wire of drive circuit, the former limit of signal isolation circuit, and signal is isolated The ground wire of circuit secondary is connected with the ground wire of level shifting circuit, protection circuit.

Described drive circuit uses driving chip IR2101S or driving chip IR2010S；Described drive circuit Including driving chip S1, resistance R4, resistance R5 and resistance R6, one end of described resistance R4 is connected with signal source, the other end with Second pin of driving chip S1 connects, the first of driving chip S1 and the 8th pin connection power supply VCC1, driving chip 4th and the 6th pin of S1 connects ground wire GND1；Resistance R5 and resistance R6 series connection, a termination driving chip S1 of resistance R5 The 7th pin, one end earth lead GND1 of resistance R6；The midpoint of resistance R5 and resistance R6 series connection is the defeated of drive circuit Go out end.

Resistance R4 is current-limiting resistance, and the size of resistance depends on the level value of signal source.

Resistance R5 is raster data model resistance, and the size of resistance depends on the grid capacitance size of driven metal-oxide-semiconductor.

Resistance R6 is grid pull down resistor, prevents in the case of not driving signal owing to electrostatic charge is at metal-oxide-semiconductor grid Accumulation causes misleading.

Choosing of driving chip S1 selects single channel to drive according to actual needs, and two-way drives or multichannel drives.

Described signal isolation circuit is mainly made up of isolating transformer T1, metal-oxide-semiconductor Q1 and sustained diode 3, wherein every It is made up of three windings from transformator T1, specifically two primary side winding, a vice-side winding；Two primary side winding have public affairs End altogether, Gu Yuanbian has three taps, first tap to connect power supply VCC2, and second tap for common port connects metal-oxide-semiconductor Q1 Drain electrode, the 3rd tap connects the negative pole of sustained diode 3；Take out for second of the drain electrode of metal-oxide-semiconductor Q1 and isolating transformer T1 Head connects, and grid is connected with the outfan of drive circuit, source ground；The negative pole of sustained diode 3 and isolating transformer T1 The 3rd tap connect, plus earth；The ground wire of signal isolation circuit is connected with the ground wire of drive circuit.

Described level shifting circuit includes resistance R1, resistance R2, resistance R3 and electric capacity C1, described resistance R2 and resistance Connecting with resistance R1 after R3 parallel connection, the one end after resistance R2 and resistance R3 parallel connection connects with wherein one end of signal isolation circuit again Connecing, one end of resistance R1 is connected with the other end of signal isolation circuit, and electric capacity C1 and resistance R2 and resistance R3 is in parallel, and signal is isolated The current flowing resistance R1 of circuit output end, resistance R2 and resistance R3, produce voltage signal at resistance R2 and resistance R3 two ends.C1 For filter high-frequency ripple.

Described protection circuit is made up of two TVS Transient Suppression Diodes, the negative pole of TVS Transient Suppression Diode D1 with The negative pole of TVS Transient Suppression Diode D2 is connected, and two positive poles are in parallel with the outfan of level shifting circuit.When output signal has wave When gushing, TVS pipe can be the most overanxious, to ensure the clean and tidy of output PWMOUT1 drive waveforms.

Compared with prior art, beneficial effects of the present invention shows:

1, in the present invention, the output on high frequency generator circuit is provided with interface, is used for using aviation plug or quickly connecing Head is connected with the cable of electromagnetic switching device；Thus facilitate and connect as one with electromagnetic switching device, form one complete one Plant railway holdfast heater, this one railway holdfast heater, be provided simultaneously with electromagnetic induction heating and electric energy transmission or turn The function changed, and its sensing heats is ideal through actual verification.

2, in the present invention, the high frequency generator circuit mainly formed by current rectifying and wave filtering circuit, inverter circuit and output, wherein The effect of current rectifying and wave filtering circuit is that the alternating voltage of input is converted into DC voltage, and to supply inverter circuit use, rectification is filtered Wave circuit structure can use all wave rectification, it would however also be possible to employ halfwave rectifier, selects more flexible from the prior art, if input Voltage is DC voltage, and current rectifying and wave filtering circuit can omit, it is also possible to retain；The effect of inverter circuit is to be changed by DC voltage Becoming the alternating voltage of high frequency, inverse circuit topology structure can use half-bridge circuit, it would however also be possible to employ full-bridge circuit, from existing skill Art can choose at random suitable inverter circuit；Output is provided with interface, can connect inductive load, and load can be equivalent to electricity Sense, inductance forms LC resonance with the electric capacity in half-bridge inversion circuit, and its load form that can connect is various, such as air core inductor, is wrapped in Inductance on metal works, the inductance being wrapped on magnetic conductor, it is wound around inductance on the transformer, the electricity being wrapped on electric conductor Sense etc., electromagnetic switching device is a kind of inductive load.

As can be seen here, this high frequency generator circuit all can use custom circuit to realize, and can realize alternating current or unidirectional current It is reverse into the technique effect of high-frequency alternating current, can be widely applied to electrical induction, Switching Power Supply, radio transmitting, wireless charging Electricity, electric welding machine etc. technical field；Circuit design is succinct, reliable and stable, uses complete digital signal processing procedure, and circuit uses spirit Living, efficiency is high.

3, in the present invention, the power circuit used is that capacitance-resistance cuts ripple mu balanced circuit, mainly by filtering resistance-capacitance circuit, rectification Cutting wave circuit and energy storage circuit composition, this capacitance-resistance is cut ripple mu balanced circuit and is used passive device composition, and simple for structure, reliability is high, With traditional non-isolation type regulated power supply is compared, having low cost, reliability is high, wide input voltage range, output voltage stabilization Etc. advantage.

4, in the present invention, the isolated form drive circuit used, two-way isolating transformer drives signal, and waveform is more preferable, effect Rate is higher；Adapt to wide input voltage range, reliable and stable；Can be applicable to electrical induction, Switching Power Supply, wireless charging etc.；This Isolated form drive circuit achieves transmission and the amplification of signal, and achieves the isolation of input signal and output signal, can be used for Switching tube altogether or the most altogether drives, the driving of the switching tube of such as half-bridge topology or full-bridge topologies.This circuit With traditional isolation drive is compared, circuit is more succinct, low cost, and reliability is high.With optocoupler type isolation drive is compared, response speed Faster.

5, in the present invention, it is made up of power circuit, micro-control unit MCU circuit, isolated form drive circuit and operation button Zero-voltage switch half-bridge control circuit, the micro-control unit MCU circuit used, it is mainly by disconnecting switch circuit, signal Change-over circuit, voltage detecting circuit and MCU chip composition, this circuit uses micro-control unit MCU circuit, and complete digital signal processes Process, circuit uses flexibly, and efficiency is high.Upper switching tube and the reference point of lower switching tube driving voltage in half-bridge circuit differ Sample, so needing to use the type of drive on non-co-ground, isolated form drive circuit can make circuit more reliable, prevent because of electromagnetic interference And make ground wire voltage wave zone carry out circuit false triggering.

6, in the present invention, the converter section mainly formed by shell, coil, magnetic conductor, protective layer and packed layer, relative to existing Having technology, when there being electric current to pass through in coil, the magnetic field concentration that magnetic conductor can produce electricity is inside magnetic conductor, when coil stream When crossing alternating current, magnetic direction and magnetic field size will not stop conversion, i.e. produce alternating magnetic field.When conductor is in this alternating magnetic field Time, conductor will produce faradic current, and therefore this device may be used for electric energy transmission or electric energy converts；If putting in this alternating magnetic field Entering independent conductor, conductor can produce eddy current effect and generate heat rapidly under vortex flow effect, and therefore this device can also be used for inductance Should heat, the conductor of heating arbitrary shape.

7, be disposed with tack coat and equal thermosphere at the position, magnetic conductor termination stretching out in shell, protective layer is positioned at soaking Outside Ceng, such frame mode, magnetic conductor major part is more crisp, embrittlement easily occurs when being heated uneven, adds soaking Layer can prevent magnetic conductor embrittlement equalizing temperature.

8, the hollow being shaped as one end open of magnetic conductor, and FERRITE CORE specific selection PC40, PC44 soft magnetism FERRITE CORE, its heats of such version is more preferable.

9, protective layer uses the materials such as epoxy resin, rubber, pottery, bonder, can effectively prevent magnetic conductor to damage；Outward Shell uses epoxy resin, glass filled nylon or plastics etc., after coil and magnetic conductor coiling complete, needs shell to protect it And encapsulation, convenient use；Packed layer uses rubber embedding, can waterproof and protection coil.

Accompanying drawing explanation

Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein:

Fig. 1 is a kind of railway holdfast heater structural representation；

Fig. 2 is high frequency generator circuit block diagram；

Fig. 3 is that capacitance-resistance cuts ripple mu balanced circuit block diagram；

Fig. 4 is that capacitance-resistance cuts ripple mu balanced circuit schematic diagram；

Fig. 5 is inverter circuit block diagram；

Fig. 6 is Zero-voltage switch half-bridge control circuit block diagram；

Fig. 7 is micro-control unit MCU circuit block diagram；

Fig. 8 is micro-control unit MCU circuit theory diagrams；

Fig. 9 is isolated form drive circuit block diagram；

Figure 10 is isolated form driving circuit principle figure；

Figure 11 is the structural representation of the present invention；

Figure 12 is hollow magnetic conductor schematic diagram；

Figure 13 is yi word pattern magnetic conductor schematic diagram.

Labelling in figure:

100, high frequency generator circuit, 101, magnetic conductor, 102, protective layer, 103, tack coat, 104, equal thermosphere, 105, line Cable, 106, shell, 107, packed layer, 108, coil, 109, adapter, 110, plug；

201, current rectifying and wave filtering circuit, 202, inverter circuit, 203, output, 2021, isolated form drive circuit, 2022, power supply Circuit, 2023, micro-control unit MCU circuit, 2024, display, 2025, operation button；

301, filtering resistance-capacitance circuit, 302, rectification cut wave circuit, 303, energy storage circuit；

401, Zero-voltage switch half-bridge control circuit, 2021, isolated form drive circuit, 2022, power circuit, 2023, micro- Control unit MCU circuit, 2025, operation button；

4011, disconnecting switch circuit, 4012, signaling conversion circuit, 4013, voltage detecting circuit, 4014, MCU chip；

2021, isolated form drive circuit, 501, drive circuit, 502, signal isolation circuit, 503, level shifting circuit, 504, protection circuit.

Detailed description of the invention

Embodiment 1

As the present invention one better embodiment, it discloses a kind of railway holdfast heater, including high frequency generator Circuit 100 and electromagnetic switching device, high frequency generator circuit it include current rectifying and wave filtering circuit 201, inverter circuit 202 and output 203, its circuit connecting relation is: current rectifying and wave filtering circuit 201 is connected to civil power, and the positive and negative two ends of output of current rectifying and wave filtering circuit 201 are also Being coupled to anode and the negative terminal of inverter circuit 202, inverter circuit 202 is connected with output；Described current rectifying and wave filtering circuit 201 is used for will The alternating voltage of input is converted into DC voltage, and supplies inverter circuit 202 and use；Described inverter circuit 202 is for by straight Stream voltage is converted into the alternating voltage of high frequency.Output is provided with interface, can connect inductive load, and load can be equivalent to inductance, Inductance forms LC resonance with the electric capacity in half-bridge inversion circuit 202.Its load form that can connect is various, such as air core inductor, is wrapped in Inductance on metal works, the inductance being wrapped on magnetic conductor, it is wound around inductance on the transformer, the electricity being wrapped on electric conductor Sense etc..Electromagnetic switching device is a kind of inductive load.Described current rectifying and wave filtering circuit 201 structure uses all wave rectification or half Ripple rectification.If input voltage is DC voltage, current rectifying and wave filtering circuit 201 can omit, it is also possible to retains.Described inverter circuit 202 topological structure use half-bridge circuit or full-bridge circuit.

Electromagnetic switching device, it is mainly made up of cable 105, adapter 109 and converter section, outside described converter section includes Shell 106, coil 108, magnetic conductor 101, protective layer 102 and packed layer 107, described protective layer 102 is overlying on magnetic conductor 101, Being wound with described coil 108 on described protective layer 102, described magnetic conductor 101, protective layer 102 and coil 108 are positioned at shell In 106, being filled with packed layer 107 between described coil 108 and shell 106, the two ends of magnetic conductor 101 stretch out in described shell 106, described coil 108 is connected with cable 105 by connector, and connector is positioned in described shell 106.

In this example, with reference to shown in Figure of description 13, magnetic conductor 101 is to be yi word pattern.For yi word pattern magnetic conductor 101, Magnetic direction is horizontal.

Described output is provided with interface, for using aviation plug or the snap joint cable phase with electromagnetic switching device Even.

Embodiment 2

As another better embodiment of the present invention, it discloses a kind of railway holdfast heater, occur including high frequency Device circuit 100 and electromagnetic switching device, in high frequency generator circuit: described inverter circuit 202 includes Zero-voltage switch half-bridge Control circuit 401, described Zero-voltage switch half-bridge control circuit 401 is by power circuit 2022, micro-control unit MCU circuit 2023, isolated form drive circuit 2021 and operation button 2025 form, described micro-control unit MCU circuit 2023 respectively with electricity Source circuit 2022, isolated form drive circuit 2021 and operation button 2025 connect；Described power circuit 2022 uses linear change Depressor power supply or switching type power supply；Described micro-control unit MCU circuit 2023 uses AVR or ARM single-chip microcomputer, micro-control unit MCU circuit, for receiving the instruction of described operation button 2025, processes backward isolated form through micro-control unit MCU circuit 2023 Drive circuit 2021 sends working signal；Described isolated form drive circuit 2021 uses optical coupling isolation circuit and transformer isolation Any one in circuit；Described operation button 2025 is used for modifying circuit parameter and regulating, and to microcontroller list Unit's MCU circuit 2023 sends work order.

Embodiment 3

As another better embodiment of the present invention, it discloses a kind of railway holdfast heater, occur including high frequency Device circuit 100 and electromagnetic switching device, in high frequency generator circuit: described inverter circuit 202 includes Zero-voltage switch half-bridge Control circuit 401, described Zero-voltage switch half-bridge control circuit 401 is by power circuit 2022, micro-control unit MCU circuit 2023, isolated form drive circuit 2021 and operation button 2025 form, described micro-control unit MCU circuit 2023 respectively with electricity Source circuit 2022, isolated form drive circuit 2021 and operation button 2025 connect；Described power circuit 2022 uses linear change Depressor power supply or switching type power supply；Described micro-control unit MCU circuit 2023 uses AVR or ARM single-chip microcomputer, micro-control unit MCU circuit, for receiving the instruction of described operation button 2025, processes backward isolated form through micro-control unit MCU circuit 2023 Drive circuit 2021 sends working signal；Described isolated form drive circuit 2021 uses optical coupling isolation circuit and transformer isolation Any one in circuit；Described operation button 2025 is used for modifying circuit parameter and regulating, and to microcontroller list Unit's MCU circuit 2023 sends work order.Described inverter circuit 202 also includes display 2024, described display 2024 are connected with described micro-control unit MCU circuit 2023, and display 2024 is for display circuit duty；Display 2024 Use LED charactron, liquid crystal numberal tube, lattice lcd screen, black-and-white crystal screen or color LCD screen, if cancelling display 2024, Circuit work will not be impacted, therefore without display 2024, or display lamp can be used to replace.

Isolated form drive circuit 2021: upper switching tube and the reference point of lower switching tube driving voltage in half-bridge circuit differ Sample, so needing to use the type of drive on non-co-ground.Isolated form drive circuit 2021 can make circuit more reliable, prevents because of electromagnetism Disturb and make ground wire voltage wave zone carry out circuit false triggering.Isolated form drive circuit 2021 can be divided into light-coupled isolation and transformator Isolation two big classes, can use any one in the design.

Embodiment 4

As another better embodiment of the present invention, it discloses a kind of railway holdfast heater, occur including high frequency Device circuit 100 and electromagnetic switching device, in high frequency generator circuit: power circuit 2022 cuts ripple mu balanced circuit for capacitance-resistance, mainly By filtering resistance-capacitance circuit 301, wave circuit 302 is cut in rectification and energy storage circuit 303 forms, and its circuit connecting relation is: filtering capacitance-resistance Circuit 301 is connected to civil power, and the output two ends of filtering resistance-capacitance circuit 301 connect rectification and cut wave circuit 302, and wave circuit 302 is cut in rectification Positive and negative output two ends are parallel to anode and the negative terminal of energy storage circuit 303.

Described filtering resistance-capacitance circuit 301 include L pole, N pole, electric capacity C1, electric capacity C2, resistance R1, resistance R2, resistance R3 and Resistance R4, L pole, N pole are connected to live wire and the zero line of civil power, electric capacity C2 and resistance R4 respectively and are parallel to L pole and two ends, N pole, electric capacity C2 plays the effect of filtering, and resistance R4 releases the electric charge that electric capacity stores under powering-off state, and resistance R1, resistance R2, resistance R3 are in parallel Constitute equivalent resistance, described equivalent resistance and electric capacity C1 RC in series resistance-capacitance circuit.Resistance R1, resistance R2, resistance R3 are in parallel Constituting equivalent resistance merchandiser resistance phase ratio error less, thermal diffusivity is more preferable, and electric capacity C2 is decompression capacitor, capacitive reactance Xc=1/ (2 π fc)。

Described rectification is cut wave circuit 302 and is included Zener diode D1, Zener diode D2, full-wave rectification bridge D3, resistance R5, resistance R6, resistance R8, resistance R9, IGCT Q1 and IGCT Q2, full-wave rectification bridge D3 exchange input two ends are connected to filtering resistance The outfan of capacitive circuit 301, full-wave rectification bridge D3 is output as anode and negative terminal, and Zener diode D1 goes here and there with resistance R5, resistance R8 Connection, the negative pole of Zener diode D1 connects full-wave rectification bridge D3 anode, the negative terminal of a termination full-wave rectification bridge D3 of resistance R8, brilliant lock Pipe Q1 grid is connected between resistance R5, resistance R8, and IGCT Q1 anode connects the live wire at the exchange input two ends of full-wave rectification bridge D3 One end, IGCT Q1 negative electrode connects the negative terminal of full-wave rectification bridge D3, and Zener diode D2 and resistance R6, resistance R9 connect, voltage stabilizing two The negative pole of pole pipe D2 connects full-wave rectification bridge D3 anode, the negative terminal of a termination full-wave rectification bridge D3 of resistance R9, IGCT Q2 grid Being connected between resistance R6, resistance R9, IGCT Q2 anode connects the zero line one end at the exchange input two ends of full-wave rectification bridge D3, brilliant lock Pipe Q2 negative electrode connects the negative terminal of full-wave rectification bridge D3.

Described energy storage circuit 303 includes that electric capacity C3, electric capacity C4 and resistance R7, electric capacity C3 and electric capacity C4 are parallel to rectification and cut The anode of wave circuit 302 and negative terminal, resistance R7 release under powering-off state electric capacity store electric charge.

Embodiment 5

As another better embodiment of the present invention, it discloses a kind of railway holdfast heater, occur including high frequency Device circuit 100 and electromagnetic switching device, in high frequency generator circuit: micro-control unit MCU circuit 2023 includes keeping apart powered-down Road 4011, signaling conversion circuit 4012, voltage detecting circuit 4013 and MCU chip 4014, its circuit connecting relation is: MCU core Sheet 4014 is connected with disconnecting switch circuit 4011, signaling conversion circuit 4012 and voltage detecting circuit 4013 respectively.

Described disconnecting switch circuit 4011 includes interface P1, resistance R1, resistance R2, integrated package U1 and electric capacity C1, isolation On-off circuit 4011 input termination button control signal, output connect MCU chip 4014 the 2nd pin, 2 feet of interface P1, resistance R2, The 1 foot series connection of integrated package U1,1 foot of interface P1 and the 2 foot ground connection of integrated package U1, resistance R1, electric capacity C1 series connection is followed by power supply Positive and negative two ends, the 3 of integrated package U1,4 feet in parallel with electric capacity C1, resistance R1, electric capacity C1 series connection midpoint connect MCU chip 4014 2nd pin.

Described signaling conversion circuit 4012 includes diode D4, diode D5, diode D6, diode D7, diode D8, diode D9, diode D10, interface P3, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C2, Electric capacity C4, described signaling conversion circuit 4012 input termination sensor signal, output connects MCU chip 4014 the 13rd, 20,21,22 Pin, diode D4, diode D7, diode D9 series connection, diode D5, diode D8, diode D10 series connection, diode D4, The negative pole of diode D5 is connected, diode D9, the connected rear ground connection of positive pole of diode D10；Resistance R11, resistance R12 series connection after with Electric capacity C2, diode D6 are in parallel；Resistance R10, electric capacity C4 are in parallel with diode D6 after connecting；Diode D6 negative pole and MCU chip 4014 the 13rd, 20,21,22 pins be connected；The midpoint of resistance R10, electric capacity C4 series connection is connected with MCU chip 4014 the 9th pin；Electricity The midpoint that resistance R13, resistance R14 series connection is followed by after diode D9, the negative pole of diode D10, resistance R13, resistance R14 series connection connects Positive source；The 1 of interface P3,2 feet connect diode D4, the positive pole of diode D5 respectively；Diode D7, the positive pole of diode D9 connect MCU chip 4014 the 40th, 41,42 pins.

Described voltage detecting circuit 4013 includes resistance R7, resistance R8, resistance R9 and electric capacity C3, described voltage detecting electricity The road 4013 detected power supply of input termination, output termination MCU chip 4014 the 18th pin；Resistance R7, resistance R8, resistance R9 go here and there Connection, electric capacity C3 is in parallel with resistance R9, one end ground connection of resistance R9, and the midpoint that resistance R8, resistance R9 connect connects MCU chip 4,014 the 18 pins.

The STM32 series monolithic that described MCU chip 4014 uses ST Microelectronics to produce, chip 5,6 foot connects Crystal oscillator Y1, diode D1, diode D2, diode D3 negative pole be connected after ground connection, positive pole respectively with resistance R4, resistance R5, resistance R6 connects, resistance R4, resistance R5, the resistance R6 other end connect respectively MCU chip 4014 the 10th, 11,12 feet；MCU chip 4014 26,29 feet respectively the 1 of connection interface P4,2 feet, the 31 of MCU chip 4014,37 feet be connected with 4 feet of interface P2, MCU chip 4014 30,34,38 feet be connected with 3 feet of interface P2,44 feet of MCU chip 4014 are connected with 2 feet of interface P2, resistance R3 and interface The 1 of P2,2 feet are in parallel, and 1 and 5 feet of interface P2 connect negative terminal and the anode of power supply respectively.

Operating process: after power on circuitry, micro-control unit MCU circuit 2023 is in holding state, and power supply indicator D1 is bright. When interface P1 receives high level, single-chip microcomputer enters program work, and lamp diode D3 is bright for running status, and the 1 of interface P4,2 feet Output square wave, two square wave phase differences are 180 degree, and square wave sends into isolated form drive circuit 2021.Sensor acquisition signal feeds back to Micro-control unit MCU circuit 2023 interface P3 foot.Micro-control unit MCU circuit 2023 feeds back display lamp diode after obtaining signal D2 is bright, and regulates dutycycle and the frequency of PWM1 and PWM2 according to feedback signal, thus realizes power adjustments and phase adjusted.

Embodiment 6

As another better embodiment of the present invention, it discloses a kind of railway holdfast heater, occur including high frequency Device circuit 100 and electromagnetic switching device, in high frequency generator circuit: isolated form drive circuit 2021 is main by drive circuit 501, signal isolation circuit 502, level shifting circuit 503 and protection circuit 504 form, wherein: drive circuit 501 input Being connected with signal source, the outfan of drive circuit 501 is connected with the input of signal isolation circuit 502, signal isolation circuit The outfan of 502 is connected with the input of level shifting circuit 503, the outfan of level shifting circuit 503 and protection circuit 504 Connect；The ground wire of signal source is connected with the ground wire of drive circuit 501, the former limit of signal isolation circuit 502, signal isolation circuit The ground wire of 502 secondary is connected with the ground wire of level shifting circuit 503, protection circuit 504.

Described drive circuit 501 uses driving chip IR2101S or driving chip IR2010S；Described driver Circuit 501 includes that driving chip S1, resistance R4, resistance R5 and resistance R6, one end of described resistance R4 are connected with signal source, separately One end is connected with second pin of driving chip S1, and the first of driving chip S1 and the 8th pin connection power supply VCC1, drive 4th and the 6th pin of dynamic chip S1 connects ground wire GND1；Resistance R5 and resistance R6 series connection, a termination of resistance R5 drives 7th pin of chip S1, one end earth lead GND1 of resistance R6；The midpoint of resistance R5 and resistance R6 series connection is driver electricity The outfan on road 501.

Described signal isolation circuit 502 is mainly made up of isolating transformer T1, metal-oxide-semiconductor Q1 and sustained diode 3, its Middle isolating transformer T1 is made up of three windings, specifically two primary side winding, a vice-side winding；Two primary side winding have one Individual common port, Gu Yuanbian has three taps, first tap to connect power supply VCC2, and second tap for common port connects MOS The drain electrode of pipe Q1, the 3rd tap connects the negative pole of sustained diode 3；The drain electrode of metal-oxide-semiconductor Q1 and the second of isolating transformer T1 Individual tap connects, and grid is connected with the outfan of drive circuit 501, source ground；The negative pole of sustained diode 3 and isolation 3rd tap of transformator T1 connects, plus earth；The ground wire of signal isolation circuit 502 and the ground wire of drive circuit 501 Connect.

Described level shifting circuit 503 includes resistance R1, resistance R2, resistance R3 and electric capacity C1, described resistance R2 and Connecting with resistance R1 after resistance R3 parallel connection, the one end after resistance R2 and resistance R3 parallel connection is with signal isolation circuit 502 wherein again One end connects, and one end of resistance R1 is connected with the other end of signal isolation circuit 502, and electric capacity C1 and resistance R2 and resistance R3 is also Connection, the current flowing resistance R1 of signal isolation circuit 502 outfan, resistance R2 and resistance R3, at resistance R2 and resistance R3 two ends Produce voltage signal.C1 is used for filter high-frequency ripple.

Described protection circuit 504 is made up of two TVS Transient Suppression Diodes, and TVS Transient Suppression Diode D1's is negative Pole is connected with the negative pole of TVS Transient Suppression Diode D2, and two positive poles are in parallel with the outfan of level shifting circuit 503.Work as output When signal has surge, TVS pipe can be the most overanxious, to ensure the clean and tidy of output PWMOUT1 drive waveforms.

Embodiment 7

As another better embodiment of the present invention, it discloses a kind of railway holdfast heater, occur including high frequency Device circuit 100 and electromagnetic switching device, in electromagnetic switching device: the shape of this magnetic conductor 101 is hollow as shown in figure 12, pin To hollow magnetic conductor 101, in hollow magnetic conductor 101, form toroidal magnetic field, magnetic field intensity and size of current, the sense of current Relevant.

Embodiment 8

As another better embodiment of the present invention, it discloses a kind of railway holdfast heater, occur including high frequency Device circuit 100 and electromagnetic switching device, electromagnetic switching device is mainly made up of two parts, coil 108 and magnetic conductor 101.

Coil 108: coil 108 material can use ordinary copper wire, if when high-frequency ac current uses, can use many Stock enamel-covered wire composition high-frequency line, increases conductive surface and amasss, to reduce the loss that Kelvin effect is brought.

Magnetic conductor 101: magnetic conductor 101 can use Fe-based amorphous alloy, ferrum ni-based amorphous alloy, cobalt base amorphous alloy, Iron-base nanometer crystal alloy, FERRITE CORE etc..In electrical induction is applied, magnetic conductor 101 magnetic flux is the highest, and efficiency is the highest, damages Consume the least.

When having electric current to pass through in coil 108, the surrounding of coil 108 wire just produces magnetic field and (has magnetic force around magnet The space of effect), the inner space being simultaneously wound around at coil 108 wire also produces magnetic field.Magnetic conductor 101 can produce electricity Magnetic field concentration, inside magnetic conductor 101, is differently formed different magnetic loops, such as Figure 12 or figure according to the structure of magnetic conductor 101 13 two kinds of versions:

In Figure 12, forming toroidal magnetic field in hollow magnetic conductor 101, magnetic field intensity and size of current, the sense of current have Close.In fig. 13, magnetic direction is horizontal.When coil 108 flows through alternating current, magnetic direction and magnetic field size will not stop to become Change, i.e. produce alternating magnetic field.When conductor is in this alternating magnetic field, conductor will produce faradic current.Therefore this device can be used Convert in electric energy transmission or electric energy.If putting into independent conductor in this alternating magnetic field, conductor can produce eddy current effect and at whirlpool electricity Generate heat rapidly under stream effect.Therefore this device can also be used for electrical induction.

Embodiment 9

As best mode for carrying out the invention, high frequency generator circuit uses any one of above-described embodiment, electromagnetic conversion Device uses following structure will obtain more preferably effect:

Magnetic conductor 101: effect is the magnetic field concentration produced by coil 108, forms magnetic loop, uses PC40, PC44 Material permeability is high, generates heat little.When coil 108 flows through alternating current, hollow magnetic conductor 101 indentation, there is the strongest by producing Alternating magnetic field.

Protective layer 102: use the materials such as epoxy resin, rubber, pottery, bonder.Magnetic conductor 101 is high rigidity fragility material Material, protective layer 102 can effectively prevent magnetic conductor 101 to damage.

Tack coat 103: equal hot material is bonded together with magnetic conductor 101

All thermospheres 104: use Heat Conduction Material such as alumina ceramic plate.Magnetic conductor 101 major part is more crisp, when inequality of being heated Easily occurring embrittlement time even, adding equal thermosphere 104 can prevent magnetic conductor 101 embrittlement equalizing temperature.

Cable 105: two core copper cable or multicore high frequency cable.

Shell 106: using epoxy resin, glass filled nylon or plastics etc., coil 108 and magnetic conductor 101 coiling complete After, need its protection and encapsulation, convenient use.

Packed layer 107: use rubber embedding, can waterproof and protection coil 108

Coil 108: use copper cash or multicore high-frequency line.

Adapter 109: cable 105 and the connection of coil 108.

Plug 110: aviation plug or snap joint, facilitates cable to be connected with high frequency generator.

Annexation: magnetic conductor 101 is innermost layer, smears binding material at magnetic conductor 101 opening part and forms tack coat 103, equal backing is attached on tack coat 103.After binding material is fully cured, magnetic conductor 101, tack coat 103 and equal thermosphere 104 Form an entirety.Layer protective layer 102 is coated outside this entirety.At protective layer 102 outer winding coil 108, coil 108 Lead-out wire is connected with cable 105 by adapter 109.Coil 108 outer layer is packed layer 107.Packed layer 107 outer layer is shell 106.Therefore electromagnetic switching device distinguishes magnetic conductor 101, protective layer 102, coil 108 layers, packed layer 107, shell from inside to outside 106.Cable 105 one end is connected with adapter 109, and the other end is connected with plug 110.

When having electric current to pass through in coil 108, the magnetic field concentration that magnetic conductor 101 can produce electricity is in magnetic conductor 101 Portion.When coil 108 flows through alternating current, magnetic direction and magnetic field size will not stop conversion, i.e. produce alternating magnetic field.If at this Putting into independent conductor in alternating magnetic field, conductor can produce eddy current effect and generate heat rapidly under vortex flow effect.Therefore this device Can also be used for electrical induction, the conductor of heating arbitrary shape.

Claims

1. a railway holdfast heater, it is characterised in that: include high frequency generator circuit (100) and electromagnetic switching device； Described high frequency generator circuit (100) including: current rectifying and wave filtering circuit (201), inverter circuit (202) and output, and its circuit is even The relation of connecing is: current rectifying and wave filtering circuit (201) is connected to civil power, and the positive and negative two ends of output of current rectifying and wave filtering circuit (201) are parallel to inversion The anode of circuit (202) and negative terminal, inverter circuit (202) is connected with output；Described current rectifying and wave filtering circuit (201) is for by defeated The alternating voltage entered is converted into DC voltage, and supplies inverter circuit (202) use；Described inverter circuit (202) is used for will DC voltage is converted into the alternating voltage of high frequency；Described electromagnetic switching device, it is mainly by cable (105), adapter (109) Forming with converter section, described converter section includes shell (106), coil (108), magnetic conductor (101), protective layer (102) and fills out Filling layer (107), described protective layer (102) is overlying on magnetic conductor (101), is wound with described line on described protective layer (102) Circle (108), described magnetic conductor (101), protective layer (102) and coil (108) are positioned in shell (106), in described coil (108) And between shell (106), it being filled with packed layer (107), the two ends of magnetic conductor (101) stretch out in described shell (106), described line Circle (108) is connected with cable (105) by connector, and connector is positioned in described shell (106)；Described output is provided with and connects Mouthful, it is used for using aviation plug (110) or snap joint to be connected with the cable (105) of electromagnetic switching device.

A kind of railway holdfast heater the most according to claim 1, it is characterised in that: stretching out in shell (106) Magnetic conductor (101) position, termination is disposed with tack coat (103) and equal thermosphere (104), and protective layer (102) is positioned at equal thermosphere (104) outside.

A kind of railway holdfast heater the most according to claim 1, it is characterised in that: described inverter circuit (202) Including Zero-voltage switch half-bridge control circuit (401), described Zero-voltage switch half-bridge control circuit (401) is by power circuit (2022), micro-control unit MCU circuit (2023), isolated form drive circuit (2021) and operation button (2025) composition, described Micro-control unit MCU circuit (2023) respectively with power circuit (2022), isolated form drive circuit (2021) and operation button (2025) connect；Described power circuit (2022) uses linear transformer power supply or switching type power supply；Described microcontroller list Unit's MCU circuit (2023) uses AVR or ARM single-chip microcomputer, and micro-control unit MCU circuit (2023) is used for receiving described operation button (2025) instruction, processes backward isolated form drive circuit (2021) through micro-control unit MCU circuit (2023) and sends work Signal；Described isolated form drive circuit (2021) uses any one in optical coupling isolation circuit and transformer isolation circuit；Institute The operation button (2025) stated is used for modifying circuit parameter and regulating, and to micro-control unit MCU circuit (2023) Send work order；Described inverter circuit (202) also includes display (2024), and described display (2024) is with described Micro-control unit MCU circuit (2023) connects, and display (2024) is used for display circuit duty.

A kind of railway holdfast heater the most according to claim 3, it is characterised in that: described power circuit (2022) Cut ripple mu balanced circuit for capacitance-resistance, mainly cut wave circuit (302) and energy storage circuit (303) group by filtering resistance-capacitance circuit (301), rectification Becoming, its circuit connecting relation is: filtering resistance-capacitance circuit (301) is connected to civil power, and the output two ends of filtering resistance-capacitance circuit (301) connect Wave circuit (302) is cut in rectification, and rectification is cut wave circuit (302) positive and negative output two ends and is parallel to the anode of energy storage circuit (303) and bears End.

A kind of railway holdfast heater the most according to claim 4, it is characterised in that: described filtering resistance-capacitance circuit (301) include that L pole, N pole, electric capacity C1, electric capacity C2, resistance R1, resistance R2, resistance R3 and resistance R4, L pole, N pole are connected to city respectively The live wire of electricity and zero line, electric capacity C2 and resistance R4 are parallel to L pole and two ends, N pole, and resistance R1, resistance R2, resistance R3 parallel connection are constituted Equivalent resistance, described equivalent resistance and electric capacity C1 RC in series resistance-capacitance circuit.

A kind of railway holdfast heater the most according to claim 5, it is characterised in that: wave circuit is cut in described rectification (302) include Zener diode D1, Zener diode D2, full-wave rectification bridge D3, resistance R5, resistance R6, resistance R8, resistance R9, IGCT Q1 and IGCT Q2, full-wave rectification bridge D3 exchange input two ends are connected to filter the outfan of resistance-capacitance circuit (301), all-wave Rectifier bridge D3 is output as anode and negative terminal, and Zener diode D1 and resistance R5, resistance R8 connect, and the negative pole of Zener diode D1 connects Full-wave rectification bridge D3 anode, the negative terminal of a termination full-wave rectification bridge D3 of resistance R8, IGCT Q1 grid is connected to resistance R5, resistance Between R8, IGCT Q1 anode connects the live wire one end at the exchange input two ends of full-wave rectification bridge D3, and IGCT Q1 negative electrode connects all-wave The negative terminal of rectifier bridge D3, Zener diode D2 and resistance R6, resistance R9 connect, and the negative pole of Zener diode D2 connects full-wave rectification bridge D3 anode, the negative terminal of a termination full-wave rectification bridge D3 of resistance R9, IGCT Q2 grid is connected between resistance R6, resistance R9, brilliant Brake tube Q2 anode connects the zero line one end at the exchange input two ends of full-wave rectification bridge D3, and IGCT Q2 negative electrode connects full-wave rectification bridge D3's Negative terminal；Described energy storage circuit (303) includes that electric capacity C3, electric capacity C4 and resistance R7, electric capacity C3 and electric capacity C4 are parallel to rectification and cut The anode of wave circuit (302) and negative terminal, resistance R7 release under powering-off state electric capacity store electric charge.

A kind of railway holdfast heater the most according to claim 3, it is characterised in that: described micro-control unit MCU Circuit (2023) includes disconnecting switch circuit (4011), signaling conversion circuit (4012), voltage detecting circuit (4013) and MCU core Sheet (4014), its circuit connecting relation is: MCU chip (4014) respectively with disconnecting switch circuit (4011), signaling conversion circuit (4012) connect with voltage detecting circuit (4013).

A kind of railway holdfast heater the most according to claim 7, it is characterised in that: described disconnecting switch circuit (4011) include that interface P1, resistance R1, resistance R2, integrated package U1 and electric capacity C1, disconnecting switch circuit (4011) input termination press Key control signal, output connects MCU chip (4014) the 2nd pin, 2 feet of interface P1, resistance R2, the 1 foot series connection of integrated package U1, connects 1 foot of mouth P1 and the 2 foot ground connection of integrated package U1, resistance R1, electric capacity C1 series connection is followed by the positive and negative two ends in power supply, integrated package U1 3,4 feet in parallel with electric capacity C1, resistance R1, electric capacity C1 series connection midpoint connect MCU chip (4014) the 2nd pin；

Described signaling conversion circuit (4012) include diode D4, diode D5, diode D6, diode D7, diode D8, Diode D9, diode D10, interface P3, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C2, electric capacity C4, described signaling conversion circuit (4012) input termination sensor signal, output connects MCU chip (4014) the 13rd, 20,21,22 Pin, diode D4, diode D7, diode D9 series connection, diode D5, diode D8, diode D10 series connection, diode D4, The negative pole of diode D5 is connected, diode D9, the connected rear ground connection of positive pole of diode D10；Resistance R11, resistance R12 series connection after with Electric capacity C2, diode D6 are in parallel；Resistance R10, electric capacity C4 are in parallel with diode D6 after connecting；Diode D6 negative pole and MCU chip (4014) the 13rd, 20,21,22 pins be connected；The midpoint of resistance R10, electric capacity C4 series connection and MCU chip (4014) the 9th pin phase Even；Resistance R13, resistance R14 series connection is followed by after diode D9, the negative pole of diode D10, resistance R13, resistance R14 series connection Midpoint connects positive source；The 1 of interface P3,2 feet connect diode D4, the positive pole of diode D5 respectively；Diode D7, diode D9 Positive pole connect MCU chip (4014) the 40th, 41,42 pins；

Described voltage detecting circuit (4013) includes resistance R7, resistance R8, resistance R9 and electric capacity C3, described voltage detecting circuit (4013) the detected power supply of input termination, output termination MCU chip (4014) the 18th pin；Resistance R7, resistance R8, resistance R9 go here and there Connection, electric capacity C3 is in parallel with resistance R9, one end ground connection of resistance R9, and the midpoint of resistance R8, resistance R9 series connection connects MCU chip (4014) 18th pin；

Described MCU chip (4014) uses the STM32 series monolithic that ST Microelectronics produces, and chip 5,6 foot connects crystalline substance Shake Y1, diode D1, diode D2, diode D3 negative pole be connected after ground connection, positive pole respectively with resistance R4, resistance R5, resistance R6 Series connection, resistance R4, resistance R5, the resistance R6 other end connect respectively MCU chip (4014) the 10th, 11,12 feet；MCU chip (4014) 26,29 feet respectively the 1 of connection interface P4,2 feet, 31,37 feet of MCU chip (4014) are connected with 4 feet of interface P2, MCU chip (4014) 30,34,38 feet are connected with 3 feet of interface P2, and 44 feet of MCU chip (4014) are connected with 2 feet of interface P2, resistance R3 with the 1 of interface P2,2 feet in parallel, 1 and 5 feet of interface P2 connect negative terminal and the anode of power supply respectively.

A kind of railway holdfast heater the most according to claim 3, it is characterised in that: described isolated form drive circuit (2021) main by drive circuit (501), signal isolation circuit (502), level shifting circuit (503) and protection circuit (504) composition, wherein: drive circuit (501) input is connected with signal source, the outfan of drive circuit (501) and letter Number isolation circuit (502) input connect, the outfan of signal isolation circuit (502) is defeated with level shifting circuit (503) Entering end to connect, the outfan of level shifting circuit (503) is connected with protection circuit (504)；The ground wire of signal source and driver electricity Road (501), the ground wire on signal isolation circuit (502) former limit connect, the ground wire of signal isolation circuit (502) secondary and level conversion Circuit (503), the ground wire of protection circuit (504) connect.

A kind of railway holdfast heater the most according to claim 9, it is characterised in that: described drive circuit (501) driving chip IR2101S or driving chip IR2010S is used；Described drive circuit (501) includes driving chip S1, resistance R4, resistance R5 and resistance R6, one end of described resistance R4 is connected with signal source, and the other end is with driving chip S1's Second pin connects, the first of driving chip S1 and the 8th pin connect the 4th and the of power supply VCC1, driving chip S1 Six pins connect ground wire GND1；Resistance R5 and resistance R6 series connection, the 7th pin of a termination driving chip S1 of resistance R5, One end earth lead GND1 of resistance R6；The outfan that midpoint is drive circuit (501) of resistance R5 and resistance R6 series connection；

Described signal isolation circuit (502) is mainly made up of, wherein isolating transformer T1, metal-oxide-semiconductor Q1 and sustained diode 3 Isolating transformer T1 is made up of three windings, specifically two primary side winding, a vice-side winding；Two primary side winding have one Common port, Gu Yuanbian has three taps, first tap to connect power supply VCC2, and second tap for common port connects metal-oxide-semiconductor The drain electrode of Q1, the 3rd tap connects the negative pole of sustained diode 3；Second of the drain electrode of metal-oxide-semiconductor Q1 and isolating transformer T1 Tap connects, and grid is connected with the outfan of drive circuit (501), source ground；The negative pole of sustained diode 3 and isolation 3rd tap of transformator T1 connects, plus earth；The ground wire of signal isolation circuit (502) and drive circuit (501) Ground wire connects；

Described level shifting circuit (503) includes resistance R1, resistance R2, resistance R3 and electric capacity C1, described resistance R2 and electricity Connecting with resistance R1 after resistance R3 parallel connection, the one end after resistance R2 and resistance R3 parallel connection is with signal isolation circuit (502) wherein again One end connects, and one end of resistance R1 is connected with the other end of signal isolation circuit (502), and electric capacity C1 and resistance R2 and resistance R3 is also Connection, the current flowing resistance R1 of signal isolation circuit (502) outfan, resistance R2 and resistance R3, at resistance R2 and resistance R3 two End produces voltage signal；

Described protection circuit (504) is made up of two TVS Transient Suppression Diodes, the negative pole of TVS Transient Suppression Diode D1 Being connected with the negative pole of TVS Transient Suppression Diode D2, two positive poles are in parallel with the outfan of level shifting circuit (503).