CN104582044B - Control circuit and control method for electromagnetic heating device - Google Patents
Control circuit and control method for electromagnetic heating device Download PDFInfo
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- CN104582044B CN104582044B CN201310493135.1A CN201310493135A CN104582044B CN 104582044 B CN104582044 B CN 104582044B CN 201310493135 A CN201310493135 A CN 201310493135A CN 104582044 B CN104582044 B CN 104582044B
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Abstract
The invention discloses a control circuit for an electromagnetic heating device. The control circuit comprises a switch module with two or more switch devices connected in parallel, a sampling module which is used for sampling the working parameters of the switch devices and connected with the switch devices, and a controller which is connected with the switch devices and the sampling module respectively and used for outputting a plurality of control signals according to the working parameters of the switch devices to correspondingly control the switch devices. According to the control circuit, the control signals can be output to correspondingly control the switch devices, so that the distribution control of the current and temperature rise of the switch devices is realized and the reliability of the control circuit is greatly improved. The invention further discloses a control method for the electromagnetic heating device.
Description
Technical field
The present invention relates to electromagnetic heating technique field, particularly to a kind of control circuit of electromagnetic heater and one kind
The control method of electromagnetic heater.
Background technology
Use single tube scheme more electromagnetic oven electric-control system in correlation technique, that is, adopt an igbt(insulated
Gate bipolar transistor, insulated gate bipolar transistor) plus associated driver circuitry complete a main core switching control
Circuit processed.
But, due to using single igbt, therefore requiring higher to the voltage and current parameter of igbt, radiating condition etc..Change
Yan Zhi, during using single igbt, the voltage x current surplus of igbt is easily not enough, and temperature rise is also easily concentrated, therefore, using single
The reliability of the ON-OFF control circuit of igbt is not high.
Content of the invention
The purpose of the present invention is intended at least solve above-mentioned technological deficiency.
For this reason, it is an object of the present invention to proposing a kind of Electromagnetic Heating in parallel using plural switching device
The control circuit of device, can output multi-channel control signal accordingly be controlled to plural switching device, thus to two
The electric current of individual above switching device, temperature rise are realized distribution and are controlled, and substantially increase the reliability of control circuit.
Further object is that proposing a kind of control method of electromagnetic heater.
For reaching above-mentioned purpose, a kind of control circuit of electromagnetic heater that one aspect of the present invention embodiment proposes, bag
Include: switch module, described switch module includes plural switching device parallel with one another；For sample described two more than
The running parameter of switching device sampling module, described sampling module is connected with described two above switching devices；And
Controller, described controller is respectively connected with described two above switching devices and described sampling module, described controller root
According to described two above switching devices running parameter output multi-channel control signal with to described two above switching devices
Accordingly controlled.
The control circuit of electromagnetic heater according to embodiments of the present invention, switch module is plural using parallel connection
Switching device, the running parameter of the plural switching device that controller is sampled according to sampling module controls letter with output multi-channel
Number respectively plural switching device is accordingly controlled, thus real to the electric current of plural switching device, temperature rise
Now distribution controls, and can maximally utilise plural switching device, so that plural switching device can more may be used
Work long hours by ground, substantially increase the reliability of control circuit.
Wherein, described running parameter is one or more of electric current, voltage and temperature of described switching device.
In one embodiment of the invention, the control circuit of described electromagnetic heater also includes drive module, institute
State drive module to be respectively connected with described two above switching devices and described controller.
Specifically, when described two above switching devices are an igbt and two igbt, the g of a described igbt
Pole is connected with described drive module respectively with the g pole of described 2nd igbt, the c pole of a described igbt and the c pole of the 2nd igbt
Be connected with the resonance modules in described electromagnetic heater respectively, the e pole of a described igbt and the e pole of the 2nd igbt respectively with
Described sampling module is connected.
Wherein, described sampling module includes: first resistor, the e pole of one end of described first resistor and a described igbt
It is connected, be connected the other end of described first resistor and power supply；Second resistance, one end of described second resistance and described first electricity
The e pole of one end of resistance and a described igbt is respectively connected with, and the other end of described second resistance is connected with described controller；First
Electric capacity, one end of described first electric capacity is connected with the other end of described second resistance and described controller, described first electric capacity
The other end is grounded；3rd resistor, one end of described 3rd resistor is extremely connected with the e of described 2nd igbt, described 3rd resistor
It is connected the other end and described power supply；4th resistance, described one end of 4th resistance and one end of described 3rd resistor and described
The e pole of the 2nd igbt is respectively connected with, and the other end of described 4th resistance is connected with described controller；Second electric capacity, described second
One end of electric capacity is connected with the other end of described 4th resistance and described controller, the other end ground connection of described second electric capacity.
In addition, described sampling module includes: the first critesistor, one end of described first critesistor and described first
The e pole of igbt is connected with power supply ground；5th resistance, one end of described 5th resistance and the other end phase of described first critesistor
Even, the other end of described 5th resistance is connected with default power supply；6th resistance, one end of described 6th resistance and described first heat
The other end of quick resistance is connected with one end of described 5th resistance, and the other end of described 6th resistance is connected with described controller；
3rd electric capacity, one end of described 3rd electric capacity is connected with the other end of described 6th resistance and described controller, described 3rd electricity
The other end ground connection held；The e pole of the second critesistor, one end of described second critesistor and described 2nd igbt and power supply ground
It is connected；7th resistance, one end of described 7th resistance is connected with the other end of described second critesistor, described 7th resistance
The other end is connected with described default power supply；8th resistance, one end of described 8th resistance is another with described second critesistor
End is connected with one end of described 7th resistance, and the other end of described 8th resistance is connected with described controller；4th electric capacity, described
One end of 4th electric capacity is connected with the other end of described 8th resistance and described controller, another termination of described 4th electric capacity
Ground.
In one embodiment of the invention, described controller is sampled according to described sampling module a described igbt and
The running parameter of the 2nd igbt exports the control signal of two-way same duty cycle to carry out to a described igbt and the 2nd igbt
Control simultaneously.
In another embodiment of the present invention, the described igbt that described controller is sampled according to described sampling module
Export the control signal of two-way same duty cycle with the running parameter of the 2nd igbt to enter to a described igbt and the 2nd igbt
Row Time-sharing control.
In yet another embodiment of the present invention, the described igbt that described controller is sampled according to described sampling module
Export the control signal of two-way different duty with the running parameter of the 2nd igbt to enter to a described igbt and the 2nd igbt
Row controls respectively.
In some embodiments of the invention, described two above switching devices can be igbt, mos pipe, IGCT
One or more of.
For reaching above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of control method of electromagnetic heater,
Wherein, the switch module in described electromagnetic heater includes an igbt parallel with one another and the 2nd igbt, described controlling party
Method comprises the following steps: s1, the running parameter of the described igbt and the 2nd igbt that samples；And s2, according to described first
The running parameter output two path control signal of igbt and the 2nd igbt is accordingly to be controlled to a described igbt and the 2nd igbt
System.
The control method of electromagnetic heater according to embodiments of the present invention, by the work to an igbt and the 2nd igbt
Sampled as parameter, and according to the running parameter output two path control signal of an igbt and the 2nd igbt of sampling with to the
One igbt and the 2nd igbt is accordingly controlled, thus the electric current of an igbt and the 2nd igbt, temperature rise etc. are realized with distribution control
System, can maximally utilise an igbt and the 2nd igbt, when making an igbt and the 2nd igbt more reliably long
Between work.And, this control method is simple and reliable.
In one embodiment of the invention, described step s2 includes: according to the work of a described igbt and the 2nd igbt
Make parameter and export the control signal of two-way same duty cycle to be controlled to a described igbt and the 2nd igbt simultaneously；Or
The control signal of two-way same duty cycle is exported with to described first according to the running parameter of a described igbt and the 2nd igbt
Igbt and the 2nd igbt carries out Time-sharing control；Or the running parameter output two-way according to a described igbt and the 2nd igbt is not
With dutycycle control signal to be controlled respectively to a described igbt and the 2nd igbt.
The aspect that the present invention adds and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and easy to understand, wherein:
Fig. 1 is the module diagram of the control circuit of the electromagnetic heater according to the embodiment of the present invention；
Fig. 2 is the module diagram of the control circuit of the electromagnetic heater according to one embodiment of the invention；
Fig. 3 a is the circuit diagram of the control circuit of the electromagnetic heater according to one embodiment of the invention；
Fig. 3 b is the circuit diagram of the control circuit of the electromagnetic heater according to another embodiment of the present invention；
Fig. 4 is the control circuit output two-way same duty cycle of the electromagnetic heater according to one embodiment of the invention
Control signal carries out simultaneously driving the schematic diagram of control to two switching devices；
Fig. 5 is the control circuit output two-way same duty cycle of the electromagnetic heater according to another embodiment of the present invention
Control signal two switching devices are carried out with the schematic diagram of timesharing drive control；
Fig. 6 is the control circuit output two-way different duty of the electromagnetic heater according to another embodiment of the present invention
Control signal two switching devices are carried out with the schematic diagram of respectively drive control；And
Fig. 7 is the flow chart of the control method of the electromagnetic heater according to the embodiment of the present invention.
Reference:
Switch module 10, sampling module 20 and controller 30, switching device 100, drive module 40, resonance modules 50；Humorous
Shake inductance l11, resonant capacitance c11 and filter capacitor c12, two drive amplifications unit u31, u32 and resistance r31, r32, and first
Resistance r51, second resistance r52, the first electric capacity c51,3rd resistor r53, the 4th resistance r54 and the second electric capacity c52, the first temperature-sensitive
Resistance rt51, the 5th resistance r55, the 6th resistance r56, the 3rd electric capacity c53, the second critesistor rt52, the 7th resistance r57,
Eight resistance r58 and the 4th electric capacity c54.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples is described.Certainly, they are only merely illustrative, and
Purpose does not lie in the restriction present invention.Additionally, the present invention can in different examples repeat reference numerals and/or letter.This heavy
It is for purposes of simplicity and clarity again, itself do not indicate the relation between discussed various embodiment and/or setting.This
Outward, the invention provides various specific technique and material example, but those of ordinary skill in the art can be appreciated that
The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it
" on " structure can include the first and second features and be formed as the embodiment of directly contact it is also possible to include other feature shape
Become the embodiment between the first and second features, such first and second features may not be directly contact.
In describing the invention, it should be noted that unless otherwise prescribed and limit, term " installation ", " being connected ",
" connection " should be interpreted broadly, for example, it may be the connection of mechanical connection or electrical connection or two element internals, can
To be to be joined directly together it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
Simple first before the control circuit and control method of the electromagnetic heater that the description embodiment of the present invention proposes
Introduce the control program that the electromagnetic oven electric-control system in correlation technique is adopted.
Electromagnetic oven heating system in correlation technique typically adopts single tube scheme (adopting single igbt), to switch
The requirement of element igbt is higher, and therefore buying difficulty is big, and the crash rate of igbt is high.Also segmentation scheme is had to adopt two igbt simultaneously
Connection, but only one tunnel output on driving, can only realize two igbt open simultaneously or simultaneously turn off (this be theoretic simultaneously
It is switched on or off, in fact, being switched on or off due to while the deviation of switching device can cause in non-critical meaning), fail
Accomplish driving width and the dutycycle of two igbt its control signals of reasonable distribution, cause current-unbalance to cause sometimes single
Igbt overload and first burn, thus cause whole system lost efficacy.Therefore, these single channel igbt drive output to fail fully to send out
Wave double igbt advantage in parallel.
Embodiments of the invention are based on above reason and propose a kind of in parallel using plural switching device
Electromagnetic heater control circuit, can output multi-channel control signal accordingly be controlled by plural switching device
System, thus the electric current of plural switching device, temperature rise are realized distribution and controlled, substantially increases the reliability of control circuit
Property.Embodiments of the invention also proposed a kind of control method of electromagnetic heater.
The control circuit of electromagnetic heater and the control of proposition according to embodiments of the present invention to be described with reference to the accompanying drawings
Method.
Fig. 1 is the module diagram of the control circuit of the electromagnetic heater according to the embodiment of the present invention.As shown in figure 1,
The control circuit of this electromagnetic heater includes switch module 10, sampling module 20 and controller 30.
Wherein, switch module 10 includes plural switching device 100 parallel with one another, sampling module 20 and two with
On switching device 100 be connected, for the running parameter of plural switching device 100 of sampling.Controller 30 and two with
On switching device 100 and sampling module 20 be respectively connected with, controller 30 is joined according to the work of plural switching device 100
Number output multi-channel control signal is accordingly to be controlled to plural switching device 100.
Wherein, the running parameter of plural switching device 100 can be in electric current, voltage and the temperature of switching device
More than one.That is, sampling module 20 can be with one or more of the electric current of sampling switch device, voltage and temperature.
In one embodiment of the invention, as shown in Fig. 2 the control circuit of above-mentioned electromagnetic heater also includes driving
Dynamic model block 40, drive module 40 is respectively connected with plural switching device 100 and controller 30, and it is right that drive module 40 is used for
The multi-way control signals of controller 30 output are amplified to generate drive signal, and controller 30 is exported by such as drive module 40
The level signal conversion of multichannel 0-5v be amplified to the level signal of 0-18v.Wherein, drive module 40 can also be integrated in control
In device 30.
Specifically, in one embodiment of the invention, as shown in Fig. 3 a or Fig. 3 b, when plural switching device
100 when being an igbt1 and two igbt2, the g pole of an igbt1 and the g pole of the 2nd igbt2 respectively with drive module 40 phase
Even, the c pole of an igbt1 is connected with the resonance modules 50 in electromagnetic heater respectively with the c pole of the 2nd igbt2, and first
The e pole of igbt1 is connected with sampling module 30 respectively with the e pole of the 2nd igbt2.
As shown in Fig. 3 a or Fig. 3 b, resonance modules 50 are lc resonance circuit, and it includes resonant inductance l11, resonant capacitance c11
With filter capacitor c12, wherein, resonant inductance l11 and resonant capacitance c11 is connected with filter capacitor c12 after being connected in parallel.Say,
The one termination power ground of filter capacitor c12, other end connects resonant power and powers positive pole pvcc, l11's and c11 being connected in parallel
One end connects resonant power and powers positive pole pvcc, and other end is connected to the c pole of an igbt1 and the c pole of the 2nd igbt2.Certainly,
Resonant inductance l11 and resonant capacitance c11 can also be connected in series.
And, drive module 40 includes two drive amplifications unit u31, u32, wherein, one end of drive amplification unit u31
Extremely it is connected with the g of an igbt1 with after resistance r31 series connection, the other end of drive amplification unit u31 is connected with controller 30, drive
One end of dynamic amplifying unit u32 is extremely connected with the g of the 2nd igbt2 with after resistance r32 series connection, and drive amplification unit u32's is another
End is connected with controller 30.Or, the drive amplification that two drive amplifications unit u31, u32 can also be made up of resolution element
Circuit.Controller 30 can be single-chip microcomputer or logical drive chip.
In one embodiment of the invention, as shown in Figure 3 a, sampling module 20 includes first resistor r51, second resistance
R52, the first electric capacity c51,3rd resistor r53, the 4th resistance r54 and the second electric capacity c52.Wherein, one end of first resistor r51 with
The e of the first igbt1 is extremely connected, and the other end of first resistor r51 and power supply ground pgnd is connected, one end of second resistance r52 and the
The e pole of one end of one resistance r51 and an igbt1 is respectively connected with, and the other end of second resistance r52 is connected with controller 30, the
One end of one electric capacity c51 is connected with the other end of second resistance r52 and controller 30, the other end ground connection of the first electric capacity c51
sgnd；One end of 3rd resistor r53 is extremely connected with the e of the 2nd igbt2, the other end of 3rd resistor r53 and power supply ground pgnd phase
Even, one end of the 4th resistance r54 is respectively connected with the e pole of one end of 3rd resistor r53 and the 2nd igbt2, the 4th resistance r54's
The other end is connected with controller 30, and one end of the second electric capacity c52 is connected with the other end of the 4th resistance r54 and controller 30, the
The other end ground connection sgnd of two electric capacity c52.
In the present embodiment, sampling module 20 sampled by the way of resistance igbt electric current naturally it is also possible to adopt it
He samples to the electric current of igbt at mode, for example with the electric current etc. of mutual inductor sample igbt.
In another embodiment of the present invention, as shown in Figure 3 b, sampling module 20 include the first critesistor rt51,
Five resistance r55, the 6th resistance r56, the 3rd electric capacity c53, the second critesistor rt52, the 7th resistance r57, the 8th resistance r58 and
4th electric capacity c54.Wherein, one end of the first critesistor rt51 is connected with the e pole of an igbt1 and power supply ground pgnd, and the 5th
One end of resistance r55 is connected with the other end of the first critesistor rt51, the other end of the 5th resistance and default power supply vcc phase
Even, one end of the 6th resistance r56 is connected with the other end of the first critesistor rt51 and one end of the 5th resistance r55, the 6th electricity
The other end of resistance r56 is connected with controller 30, one end of the 3rd electric capacity c53 and the other end of the 6th resistance r56 and controller 30
It is connected, the other end ground connection sgnd of the 3rd electric capacity c53；One end of second critesistor rt52 and the e pole of the 2nd igbt2 and power supply
Ground pgnd is connected, and one end of the 7th resistance r57 is connected with the other end of the second critesistor rt52, and the 7th resistance r57's is another
End is connected with default power supply vcc, the other end of one end of the 8th resistance r58 and the second critesistor rt52 and the 7th resistance rt57
One end be connected, the other end of the 8th resistance r58 is connected with controller 30, one end of the 4th electric capacity c54 and the 8th resistance r58's
The other end is connected with controller 30, the other end ground connection sgnd of the 4th electric capacity c54.
In the present embodiment, adopt the critesistor of the thermometric temperature to detect igbt in sampling module 20, and will detect
To the temperature of igbt be sent to controller 30.
In other embodiments of the invention, sampling module 20 can also make into detect the electricity of the voltage of igbt as needed
Road, or make the circuit that the electric current to igbt and temperature are all sampled into.
Wherein, in one embodiment of the invention, as shown in Figure 3 a, the c pole of the c pole of an igbt1 and the 2nd igbt2
Link together, the e of two igbt extremely respectively sampling resistor r51, r53 of one detection electric current of concatenation with arriving, the g of two igbt
Pole is connected to two outfans of drive module 40, accepts the control of drive module 40 output.Drive module 40 has two drives
Dynamic amplifying unit u31, u32, and comprise two resistance r31, r32, mainly the level signal conversion of 0 to 5v is amplified to 0～
The level signal of 18v, to be suitable for driving igbt.Controller 30 is single-chip microcomputer or logical operation module, and it is responsible for receiving igbt phase
Close running status and include electric current, temperature information (such as ad1, ad2 two-way current signal), and output igbt original control signal
(such as pwm1, pwm2 two-way igbt output signal).The two path control signal of control igbt1 and igbt2 of controller 30 output
Time width or dutycycle depend on it and receive the electric current coming, temperature information, controller 30 carries out logical operationss to this information
Afterwards, and according to igbt reliability principle be allocated two-way igbt different open width or dutycycle.
In one embodiment of the invention, as shown in figure 4, controller 30 sampled according to sampling module 20 first
The running parameter of igbt1 and the 2nd igbt2 such as current information exports the control signal of two-way same duty cycle with to first
Igbt1 and the 2nd igbt2 is controlled simultaneously.Say, as shown in figure 4, being using two kinds for two switching devices (igbt)
The drive pattern of same duty cycle, this situation is usually two specification identical switching devices to be driven control.
In another embodiment of the present invention, as shown in figure 5, controller 30 sampled according to sampling module 20 first
The running parameter of igbt1 and the 2nd igbt2 such as current information exports the control signal of two-way same duty cycle with to first
Igbt1 and the 2nd igbt2 carries out Time-sharing control.That is, being to be driven using timesharing for two switching devices (igbt)
Pattern, that is, for driving time summation fixed in the case of, two switching devices each undertake half the time and (or carry out organic point
Join time scale) carry out timesharing driving igbt.The pattern being driven using this timesharing, can be effectively reduced sending out of switching device
Hot temperature rise.
In yet another embodiment of the present invention, as shown in fig. 6, controller 30 sampled according to sampling module 20 first
The running parameter of igbt1 and the 2nd igbt2 such as current information exports the control signal of two-way different duty with to first
Igbt1 and the 2nd igbt2 is controlled respectively.That is, as shown in fig. 6, when the present embodiment is to drive a road using two-way
Between many, the road time few different in width dutycycle collocation mode.This type of drive generally is directed to opening of different size
Close what device was driven, carry out different dutycycle distribution according to different switching capabilities.
It is more than typically several mode of operations that two-way drives, indeed, it is possible to according to needs, the derailing switch to two-way
The priority of part, switching width, duty cycle of switching can be carried out changing adjustment and carry out organic assembling, thus realizing more
Multiple-working mode, when so that switching device is worked, the surplus (electric current, temperature rise) of electrical quantity is more, and then reliability is higher.Additionally,
Temporal combination can also be carried out, such as when starting, double switch device adopts drive pattern as shown in Figure 4, then adopts
Drive pattern as shown in Figure 5, finally adopts drive pattern as shown in Figure 6.It is of course also possible to using a kind of drive pattern
Double switch device is driven.
In some embodiments of the invention, plural switching device 100 can be in igbt, mos pipe, IGCT
One or more.
In some embodiments of the invention, the control circuit of above-mentioned electromagnetic heater is by adopting on source
Two-way pulse separation output control drives an igbt1 and the 2nd igbt2.The control signal of two-way igbt can be according to sampling two
The electric current of individual igbt or temperature rising state carry out reasonable distribution, such as by the electric current of detection contrast two-way igbt, patrol through single-chip microcomputer
Volume computing, such as wherein one road electric current exceedes certain value with respect to an other road electric current, then can to reduce electric current big for single-chip microcomputer
The pulse width of branch road or dutycycle.Alternatively, it is also possible to utilize temperature detection, the temperature wherein 1 igbt is such as detected is too high,
Then can accordingly reduce pulse width or the dutycycle of this road igbt.In addition it is also possible to opening according to two different sizes or feature
Close device, carry out different time opens distribution, such as one igbt one IGCT of parallel connection, can adopt open-minded when firmly opening
IGCT, soft opening is to open igbt so to carry out time distribution, and the feature such that it is able to give full play to different switching devices is entered
Row controls management.
Therefore, the control circuit of electromagnetic heater according to embodiments of the present invention, switch module is using in parallel two
Above switching device, the running parameter of the plural switching device that controller is sampled according to sampling module is with output multi-channel
Control signal is accordingly controlled to plural switching device respectively, thus to the electric current of plural switching device,
Temperature rise is realized distribution and is controlled, and can maximally utilise plural switching device, make the plural switching device can
More reliably to work long hours, substantially increase the reliability of control circuit.
Fig. 7 is the control method of the electromagnetic heater according to the embodiment of the present invention.Wherein, opening in electromagnetic heater
Close module and include an igbt parallel with one another and the 2nd igbt.As shown in fig. 7, the control method of this electromagnetic heater includes
Following steps:
S1, the running parameter of sampling the first igbt and the 2nd igbt, the such as electric current of sampling the first igbt and the 2nd igbt,
Temperature information.
S2, the running parameter output two path control signal according to an igbt and the 2nd igbt is with to an igbt and second
Igbt is accordingly controlled.
Specifically, step s2 includes: the running parameter according to an igbt and the 2nd igbt exports the identical duty of two-way
The control signal of ratio is to be controlled to an igbt and the 2nd igbt simultaneously；Or the work according to an igbt and the 2nd igbt
Make parameter and export the control signal of two-way same duty cycle so that Time-sharing control is carried out to an igbt and the 2nd igbt；Or according to
The running parameter of the first igbt and the 2nd igbt exports the control signal of two-way different duty with to an igbt and second
Igbt is controlled respectively.
That is, in an embodiment of the present invention, the control pulse that controller such as single-chip microcomputer has two-way independence is defeated
Go out, control double switch device respectively, two-way controls the pulse can be according to needing pulse-width, pulse duty factor to be modulated
With distribution, wherein, it is according to two that two-way controls the principle when carrying out pulse width, pulse duty factor modulation with distribution for the pulse
The characteristic of switching device and two switching devices working condition operationally and determine.
The control method of electromagnetic heater according to embodiments of the present invention, by the work to an igbt and the 2nd igbt
Sampled as parameter, and according to the running parameter output two path control signal of an igbt and the 2nd igbt of sampling with to the
One igbt and the 2nd igbt is accordingly controlled, thus the electric current of an igbt and the 2nd igbt, temperature rise etc. are realized with distribution control
System, can maximally utilise an igbt and the 2nd igbt, when making an igbt and the 2nd igbt more reliably long
Between work.And, this control method is simple and reliable.
In flow chart or here any process described otherwise above or method description are construed as, represent and include
The module of the code of executable instruction of one or more steps for realizing specific logical function or process, fragment or portion
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by substantially simultaneously in the way of or in the opposite order, carry out perform function, this should be by the present invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or here logic described otherwise above and/or step, for example, it is possible to be considered as to use
In the order list of the executable instruction realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system as computer based system, including processor or other can hold from instruction
Row system, device or equipment instruction fetch the system of execute instruction) use, or with reference to these instruction execution systems, device or set
Standby and use.For the purpose of this specification, " computer-readable medium " can any can be comprised, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress using with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following: has the electricity of one or more wirings
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (ram), read only memory
(rom), erasable edit read-only storage (eprom or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (cdrom).In addition, computer-readable medium can even is that the paper that can print described program thereon or other are suitable
Medium, because edlin, interpretation or if necessary with it can then be entered for example by carrying out optical scanning to paper or other media
His suitable method is processed to electronically obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realizing.For example, if realized with hardware, and the same in another embodiment, can use well known in the art under
Any one of row technology or their combination are realizing: have the logic gates for data signal is realized with logic function
Discrete logic, there is the special IC of suitable combinational logic gate circuit, programmable gate array (pga), scene
Programmable gate array (fpga) etc..
Those skilled in the art are appreciated that to realize all or part step that above-described embodiment method carries
Suddenly the program that can be by completes come the hardware to instruct correlation, and described program can be stored in a kind of computer-readable storage medium
In matter, this program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, can be integrated in a processing module in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a module.Above-mentioned integrated mould
Block both can be to be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.Described integrated module is such as
Fruit using in the form of software function module realize and as independent production marketing or use when it is also possible to be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and can carry out multiple changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention by claims and its equivalent limits.
Claims (12)
1. a kind of control circuit of electromagnetic heater is it is characterised in that include:
Switch module, described switch module includes plural switching device parallel with one another；
For the sampling module of the running parameter of described two above switching devices of sampling, described sampling module with described two
Above switching device is connected；And
Controller, described controller is respectively connected with described two above switching devices and described sampling module, described control
Device is according to the running parameter output multi-channel control signal of described two above switching devices with to described two above switches
Device is accordingly controlled.
2. the control circuit of electromagnetic heater as claimed in claim 1 is it is characterised in that described running parameter is described opening
Close one or more of electric current, voltage and temperature of device.
3. the control circuit of electromagnetic heater as claimed in claim 1 is it is characterised in that also including drive module, described
Drive module is respectively connected with described two above switching devices and described controller.
4. the control circuit of electromagnetic heater as claimed in claim 3 is it is characterised in that work as described two above switches
When device is an igbt and two igbt, the g pole of a described igbt and the g pole of described 2nd igbt respectively with described driving
Module is connected, the c pole of a described igbt and the c pole of the 2nd igbt respectively with described electromagnetic heater in resonance modules phase
Even, the e pole of a described igbt is connected with described sampling module respectively with the e pole of the 2nd igbt.
5. the control circuit of electromagnetic heater as claimed in claim 4 is it is characterised in that described sampling module includes:
First resistor, one end of described first resistor is extremely connected with the e of a described igbt, the other end of described first resistor with
It is connected power supply；
Second resistance, phase is distinguished with one end of described first resistor and the e pole of a described igbt in one end of described second resistance
Even, the other end of described second resistance is connected with described controller；
First electric capacity, one end of described first electric capacity is connected with the other end of described second resistance and described controller, and described
The other end ground connection of one electric capacity；
3rd resistor, one end of described 3rd resistor is extremely connected with the e of described 2nd igbt, the other end of described 3rd resistor with
Described power supply ground is connected；
4th resistance, the e pole phase respectively of described one end of 4th resistance and one end of described 3rd resistor and described 2nd igbt
Even, the other end of described 4th resistance is connected with described controller；
Second electric capacity, one end of described second electric capacity is connected with the other end of described 4th resistance and described controller, and described
The other end ground connection of two electric capacity.
6. the control circuit of electromagnetic heater as claimed in claim 4 is it is characterised in that described sampling module includes:
It is connected first critesistor, the e pole of one end of described first critesistor and a described igbt and power supply；
5th resistance, one end of described 5th resistance is connected with the other end of described first critesistor, described 5th resistance
The other end is connected with default power supply；
6th resistance, one end of described 6th resistance and the other end of described first critesistor and one end of described 5th resistance
It is connected, the other end of described 6th resistance is connected with described controller；
3rd electric capacity, one end of described 3rd electric capacity is connected with the other end of described 6th resistance and described controller, and described
The other end ground connection of three electric capacity；
It is connected second critesistor, the e pole of one end of described second critesistor and described 2nd igbt and power supply；
7th resistance, one end of described 7th resistance is connected with the other end of described second critesistor, described 7th resistance
The other end is connected with described default power supply；
8th resistance, one end of described 8th resistance and the other end of described second critesistor and one end of described 7th resistance
It is connected, the other end of described 8th resistance is connected with described controller；
4th electric capacity, one end of described 4th electric capacity is connected with the other end of described 8th resistance and described controller, and described
The other end ground connection of four electric capacity.
7. the control circuit of electromagnetic heater as claimed in claim 4 is it is characterised in that described controller is adopted according to described
The running parameter of a described igbt and the 2nd igbt of egf block sampling exports the control signal of two-way same duty cycle with right
A described igbt and the 2nd igbt is controlled simultaneously.
8. the control circuit of electromagnetic heater as claimed in claim 4 is it is characterised in that described controller is adopted according to described
The running parameter of a described igbt and the 2nd igbt of egf block sampling exports the control signal of two-way same duty cycle with right
A described igbt and the 2nd igbt carries out Time-sharing control.
9. the control circuit of electromagnetic heater as claimed in claim 4 is it is characterised in that described controller is adopted according to described
The running parameter of a described igbt and the 2nd igbt of egf block sampling exports the control signal of two-way different duty with right
A described igbt and the 2nd igbt is controlled respectively.
10. the control circuit of electromagnetic heater as claimed in claim 1 is it is characterised in that described two above switch
Device is one or more of igbt, mos pipe, IGCT.
A kind of 11. control methods of electromagnetic heater are it is characterised in that the switch module in described electromagnetic heater includes
An igbt parallel with one another and the 2nd igbt, described control method comprises the following steps:
S1, the running parameter of the described igbt and the 2nd igbt that samples；And
S2, according to the running parameter of a described igbt and the 2nd igbt output two path control signal with to a described igbt and
2nd igbt is accordingly controlled.
The control method of 12. electromagnetic heaters as claimed in claim 11 is it is characterised in that described step s2 includes:
Running parameter according to a described igbt and the 2nd igbt exports the control signal of two-way same duty cycle with to described
First igbt and the 2nd igbt is controlled simultaneously；Or
Running parameter according to a described igbt and the 2nd igbt exports the control signal of two-way same duty cycle with to described
First igbt and the 2nd igbt carries out Time-sharing control；Or
Running parameter according to a described igbt and the 2nd igbt exports the control signal of two-way different duty with to described
First igbt and the 2nd igbt is controlled respectively.
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| CN201310493135.1A CN104582044B (en) | 2013-10-18 | 2013-10-18 | Control circuit and control method for electromagnetic heating device |
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| CN201310493135.1A CN104582044B (en) | 2013-10-18 | 2013-10-18 | Control circuit and control method for electromagnetic heating device |
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| CN104582044B true CN104582044B (en) | 2017-01-18 |
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| CN106527531B (en) * | 2016-12-30 | 2019-01-22 | 西门子（上海）电气传动设备有限公司 | Parallel IGBT temperature control equipment and method |
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| CN203563220U (en) * | 2013-10-18 | 2014-04-23 | 美的集团股份有限公司 | Control circuit of electromagnetic heating device |
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| JPS5856475B2 (en) * | 1979-08-03 | 1983-12-15 | 株式会社東芝 | Oscillation circuit of induction heating cooker |
| CN102235690A (en) * | 2010-04-22 | 2011-11-09 | 乐金电子(天津)电器有限公司 | Microwave oven and control method thereof |
| CN202998532U (en) * | 2012-07-30 | 2013-06-12 | 东莞市精诚电能设备有限公司 | Electromagnetic induction heating control circuit based on digital signal processing |
| CN203147845U (en) * | 2013-01-31 | 2013-08-21 | 深圳麦格米特电气股份有限公司 | Mechanical frequency conversion microwave oven |
| CN203136220U (en) * | 2013-02-21 | 2013-08-14 | 美的集团股份有限公司 | Electromagnetic heating device |
| CN103313451B (en) * | 2013-05-30 | 2015-06-17 | 杨作峰 | Electromagnetic heating circuit utilizing single-chip microcomputer to automatically track resonant frequency |
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