CN105517216B - Electromagnetic heating control device and electromagnetic heating apparatus - Google Patents
Electromagnetic heating control device and electromagnetic heating apparatus Download PDFInfo
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- CN105517216B CN105517216B CN201410499975.3A CN201410499975A CN105517216B CN 105517216 B CN105517216 B CN 105517216B CN 201410499975 A CN201410499975 A CN 201410499975A CN 105517216 B CN105517216 B CN 105517216B
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Abstract
The invention discloses a kind of electromagnetic heating control device, including rectification module, rectification module is for rectifying to export direct current the alternating current of input；Resonance modules comprising resonant capacitance and resonant inductance, for being electrically generated resonance potential according to the direct current after rectification；The resonance compensation module for being connected with resonant inductance and being connected in parallel with resonant capacitance, compensates for the capacitance parameter to resonant capacitance；The first switch tube being connected with resonance compensation module；Control module, for controlling first switch tube.As a result, when the first switch tube is turned on, capacitance parameter is compensated by resonance compensation module, resonant peak voltage is effectively reduced, improve the Upper Bound Power of laser heating；When first switch tube is closed, guarantees that first switch tube is able to achieve no-voltage conducting, reduce the loss of first switch tube, reduce the lower power of laser heating, expand the power bracket of sustainable heating.The invention also discloses a kind of electromagnetic heating apparatus.
Description
Technical field
The present invention relates to living electric apparatus technical field, in particular to a kind of electromagnetic heating control device and a kind of electromagnetic heating
Equipment.
Background technique
Relevant single tube electromagnetic oven passes through interval Power Regulation when low-power heats mostly and is heated, this is because
IGBT ((Insulated Gate Bipolar Transistor, insulated gate bipolar when 1000W or so in single tube electromagnetic oven
Transistor) can not achieve that voltage zero-cross is open-minded, cause the loss of IGBT very big, so, when power is lower than 1000W can only by
Power Regulation of having a rest is heated.
But maximum actual power usually only 1800W of single tube electromagnetic oven or so, in this way, being able to carry out in electromagnetic oven
The power bracket of continuous heating is just very small, for example, can only between 1000W to 1800W laser heating.Some culinary arts need to hold
Continuous low-power continues high-power heating and just can reach preferably to cook effect, and relevant electromagnetic oven will be unable to meet user more
The culinary art demand of sample.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of electromagnetic heating control device, the electromagnetic heating control device
It can expand the power bracket of electromagnetic heating apparatus continuous heating, realize continuous low power heating, meet that user is diversified to cook
It prepares food demand.
It is another object of the present invention to propose a kind of electromagnetic heating apparatus.
The electromagnetic heating control device that embodiment proposes according to an aspect of the present invention, including rectification module, the rectification mould
Block is for rectifying to export direct current the alternating current of input；Resonance modules, the resonance modules include resonant capacitance and
Resonant inductance, for being electrically generated resonance potential according to the direct current after rectification；Resonance compensation module, the resonance compensation module and institute
It states resonant inductance to be connected and be connected in parallel with the resonant capacitance, for the capacitance parameter to resonant capacitance in the resonance modules
It compensates；First switch tube, the first switch tube are connected with the resonance compensation module；Control module, the control mould
Block controls the first switch tube.
The electromagnetic heating control device proposed according to embodiments of the present invention is mended by resonance when the first switch tube is turned on
It repays module to compensate the capacitance parameter of resonant capacitance, the peak value of resonance potential is effectively reduced, namely reduce first switch tube
Crest voltage improve the accessible maximum power of electromagnetic heating apparatus to improve the Upper Bound Power of laser heating；When
When first switch tube is closed, quickly resonance potential can be made to be reduced to zero, guarantee that first switch tube is able to achieve no-voltage conducting, from
And the loss of first switch tube is reduced, the lower limit value of power bracket when prolonging its service life, and reducing laser heating,
It is the power bracket for expanding sustainable heating.
A specific embodiment according to the present invention, the resonant capacitance and resonant inductance series connection or described humorous
Vibration capacitor is connected with resonance inductance in parallel.
A specific embodiment according to the present invention, the resonance compensation module include: first capacitor and second switch,
The first end of the second switch is connected on the node between resonant inductance and the resonant capacitance, the second switch
Second end be connected with one end of the first capacitor, the other end phase of the other end of the first capacitor and the resonant capacitance
Even, there is first node between the second switch and the first capacitor；First resistor, the first resistor are connected in parallel on institute
It states between the third end of second switch and second end；Zener diode, the zener diode is in parallel with the first resistor,
The cathode of the zener diode is connected with the third end of the second switch, the anode of the zener diode and described the
The second end of two switching tubes is connected；It is soft to open circuit, the third end of described soft one end for opening circuit and the second switch
It is connected, the soft other end for opening circuit is connected with the first switch tube.
Another specific embodiment according to the present invention, resonance compensation module setting is in the resonant capacitance and described
Between resonant inductance, the input terminal of the resonance compensation module is connected with the resonant inductance, the resonance compensation module it is defeated
Outlet is connected with the resonant capacitance, and the resonant capacitance is connected across the both ends of the first switch tube.
A specific embodiment according to the present invention, the soft circuit of opening includes: second resistance, the second resistance
One end is connected with the third end of the second switch, and the other end of the second resistance is connected with the first switch tube；String
The 3rd resistor and diode of connection, the cathode of the diode are connected with one end of the second resistance, the sun of the diode
Pole is connected with the other end of the 3rd resistor, and the other end of the 3rd resistor is connected with the third end of second switch.
According to one embodiment of present invention, the electromagnetic heating control device further include: filter module, the filtering
For module for being filtered to the direct current after rectification, the filter module is connected to the rectification module and the resonance modules
Between.
A specific embodiment according to the present invention, the filter module further include the second inductance and third capacitor, work as institute
State rectification module be rectifier bridge when, one end of second inductance is connected with the first output end of the rectifier bridge, the third
One end of capacitor is connected with the other end of second inductance, and the second of the other end of the third capacitor and the rectifier bridge is defeated
Outlet is grounded after being connected, and has third node, the third node and institute between the third capacitor and second inductance
Resonance modules are stated to be connected.
A specific embodiment according to the present invention, the first switch tube and the second switch be metal-oxide-semiconductor or
IGBT。
According to one embodiment of present invention, the electromagnetic heating control device further include: immunity module, it is described anti-
Interference module is connected between the rectification module and the AC power source for providing the alternating current.Wherein, the immunity module
Including fuse, the 4th resistance and the 4th capacitor, one end of the fuse is connected with one end of the AC power source, the guarantor
The other end of dangerous silk is connected with one end of the 4th resistance, and the other end of the 4th resistance is another with the AC power source
End is connected, and the 4th capacitor is connected in parallel on the both ends of the 4th resistance.
The electromagnetic heating apparatus that embodiment proposes according to a further aspect of the invention, comprising: the electromagnetic heating controls dress
It sets.
The electromagnetic heating apparatus proposed according to embodiments of the present invention guarantees electromagnetic heating by electromagnetic heating control device
Switching tube in control device is able to achieve no-voltage conducting, so that the loss of switching tube is reduced, function when improving continuous heating
The upper limit value of rate range, the lower limit value of power bracket when reducing continuous heating expand power bracket when continuous heating, reduce
The turn-on consumption of switchable pipe reduces the difficulty of system radiating, meets the diversified culinary art demand of user.
A specific embodiment according to the present invention, the electromagnetic heating apparatus can be electromagnetic oven, IH electric cooker or IH electricity
Pressure cooker.
Detailed description of the invention
Fig. 1 is the block diagram of electromagnetic heating control device according to an embodiment of the present invention；
Fig. 2 is the block diagram of electromagnetic heating control device accord to a specific embodiment of that present invention；
Fig. 3 is the block diagram of the electromagnetic heating control device of another specific embodiment according to the present invention；
Fig. 4 is the block diagram of the electromagnetic heating control device of another specific embodiment according to the present invention；And
Fig. 5 is the block diagram of electromagnetic heating control device according to an embodiment of the invention.
Detailed description of the invention:
Rectification module 1, resonance compensation module 3, first switch tube U1, control module 4, filter module 5, resists resonance modules 2
Interference module 6, second switch U2, first resistor R1, zener diode ZD, soft opens circuit 301, second at first capacitor C1
Resistance R2,3rd resistor R3, diode D, resonant inductance L1, resonant capacitance C2, the second inductance L2, third capacitor C3, the one or two
Pole pipe D1, the second diode D2, third diode D3, the 4th diode D4, fuse F, the 4th resistance R4 and the 4th capacitor C4.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is set to describe the electromagnetic heating control device proposed according to embodiments of the present invention and electromagnetic heating
It is standby.
Fig. 1 is the block diagram of electromagnetic heating control device according to an embodiment of the present invention.As shown in Figure 1, the electromagnetism
Heating control apparatus includes: rectification module 1, resonance modules 2, resonance compensation module 3, first switch tube U1 and control module 4.
Wherein, rectification module 1 is for rectifying to export direct current the alternating current of input；Resonance modules 2 and rectification
Module 1 is connected, and resonance modules 2 include resonant capacitance C2 and resonant inductance L1, for being electrically generated resonance according to the direct current after rectification
Voltage；Resonance compensation module 3 is connected with resonant inductance L1 and is connected in parallel with resonant capacitance C2, for humorous in resonance modules 2
The capacitance parameter of vibration capacitor C2 compensates；First switch tube U1 is connected with resonance compensation module 3；Control module 4 is opened with first
It closes pipe U1 to be connected, for controlling first switch tube U1.
By the way that resonance compensation module 3 is in parallel with resonant capacitance C2, in this way, resonance compensation module 3 is in the every of resonance modules 2
The capacitance parameter of resonant capacitance C2 is compensated in a harmonic period, for example, when resonance compensation module 3 works in compensation model
When, the crest voltage of resonance potential can be reduced, namely reduce the crest voltage of first switch tube, improve the power of laser heating
The upper limit value of range improves the accessible maximum power of electromagnetic heating apparatus；When resonance compensation module 3 works in non-compensation mould
When formula, resonance potential is promptly dropped to zero, guarantees that first switch tube U1 can be from when next harmonic period starts
No-voltage conducting, to reduce the loss of first switch tube, the lower limit value of power bracket, adds electromagnetism when reducing laser heating
Hot equipment can realize laser heating in wider power bracket.
As a result, when the first switch tube is turned on, it is compensated by capacitance parameter of the resonance compensation module to resonant capacitance,
The peak value of resonance potential is effectively reduced, namely reduces the crest voltage of first switch tube, to improve the upper limit of laser heating
Power improves the accessible maximum power of electromagnetic heating apparatus；When first switch tube is closed, quickly resonance potential can be made to drop
Down to zero, guarantee that first switch tube is able to achieve no-voltage conducting, to reduce the loss of first switch tube, reduces continuous add
The lower limit value of power bracket when hot that is to say the power bracket for expanding sustainable heating, reduce the turn-on consumption of switching tube, prolong
Its long service life, and the difficulty of switching tube heat dissipation is reduced, meet the diversified culinary art demand of user.For example, passing through design
The different resonant parameters of resonance modules 2, allow power bracket when laser heating between 300W-2300W, laser heating
Maximum power it is bigger than in the related technology, while the minimum power of laser heating is smaller than in the related technology.According to
A specific example of the invention, first switch tube U1 can be MOS (metal-oxid-semiconductor, metal-oxide
Object-semiconductor field effect transistor) pipe or IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar
Transistor) etc. high power transistors, when first switch tube U1 is IGBT, the collector of IGBT is defeated with resonance compensation module 3
Outlet be connected, the emitter of IGBT ground connection, the grid of IGBT is connected with control module 4.
According to some specific embodiments of the present invention, as shown in Figures 2 to 4, resonant capacitance C2 and resonant inductance L1 can go here and there
Connection connection or resonant capacitance C2 and resonant inductance L1 can be connected in parallel.
As shown in Figures 2 and 3, when resonant capacitance C2 and resonant inductance L1 are connected in series, one end of resonant inductance L1 with
Rectification module 1 is connected, and the other end of resonant inductance L1 is connected with one end of resonant capacitance C2, another termination of resonant capacitance C2
Ground.In other words, resonant inductance L1 and resonant capacitance C2 constitutes cascade coupled resonator modules, wherein resonance compensation module 3 and resonant inductance
One end of L1 connects, and is connected in parallel with resonant capacitance C2.
As shown in figure 4, when resonant capacitance C2 and resonant inductance L1 are connected in parallel, one end of resonant inductance L1 and resonance electricity
One end of appearance C2 is connected with rectification module 1 again after being connected, and the other end of resonant inductance L1 is connected with the other end of resonant capacitance C2
It is connected again with first switch tube U1 afterwards, such as is connected with the collector of first switch tube U1.In other words, resonant inductance L1 is harmonious
The capacitor C2 that shakes constitutes parallel resonance module, wherein resonance compensation module 3 is connected with resonant inductance L1, and simultaneously with resonant capacitance C2
Connection connection.
Carry out resonance compensation module in the electromagnetic heating control device of the present invention is described in detail embodiment below with reference to Fig. 2-Fig. 4
3 circuit diagram.
A specific embodiment according to the present invention, as shown in Fig. 2, when resonant capacitance C2 and resonant inductance L1 is connected in series
When, one end of the other end of resonant inductance L1 and resonant capacitance C2 are connected with resonance compensation module 3 again after being connected, resonance compensation mould
Block 3 can be connected in parallel between resonant capacitance C2 and first switch tube U1.Specifically, resonance compensation module 3 include: first capacitor C1,
Second switch U2, first resistor R1, zener diode ZD and soft open circuit 301.
Wherein, the first end of second switch U2 is connected on the node between resonant inductance L1 and resonant capacitance C2, the
The second end of two switching tube U2 is connected with one end of first capacitor C1, and the other end of first capacitor C1 is another with resonant capacitance C2's
End is grounded after being connected, and has first node B between second switch U2 and first capacitor C1；First resistor R1 is connected in parallel on second and opens
Between the third end and second end for closing pipe U2；Zener diode ZD is in parallel with first resistor R1, the cathode of zener diode ZD with
The third end of second switch U2 is connected, and the anode of zener diode ZD is connected with the second end of second switch U2；It is soft open-minded
One end of circuit 301 is connected with the third end of second switch U2, the soft other end for opening circuit 301 respectively with second switch
The first end of U2 is connected with the collector of first switch tube U1 such as first switch tube U1.Soft circuit 301 of opening can make second
Switching tube U2 realization is open-minded under no-voltage, to reduce the turn-on consumption of second switch U2, prolongs its service life.
A specific example according to the present invention, second switch U2 can be the high power transistors such as IGBT, metal-oxide-semiconductor, when
When second switch U2 is IGBT, the first end of second switch U2 can be the collector of IGBT, the second of second switch U2
End can be the emitter of IGBT, and the third end of second switch U2 can be the grid of IGBT.
Further, as shown in Fig. 2, soft circuit 301 of opening includes: second resistance R2,3rd resistor R3 and diode D.
Wherein, one end of second resistance R2 is connected with the third of second switch U2 end, that is, grid, and second resistance R2's is another
One end collector with first end, that is, collector of second switch U2 and first switch tube U1 such as first switch tube U1 respectively
It is connected；3rd resistor R3 and diode D series connection, also, the series circuit of 3rd resistor R3 and diode D also with second resistance R2
The cathode of parallel connection, diode D is connected with the other end of second resistance R2, one end phase of the anode and 3rd resistor R3 of diode D
Even, the other end of 3rd resistor R3 be connected with one end of second resistance R2 afterwards and second switch U2 third end i.e. grid phase
Even.
That is, resonance compensation module 3 may include the second switch U2 being connected in series and first capacitor C1, the first electricity
Resistance R1 and zener diode ZD is connected in parallel between the grid and emitter of second switch U2, second resistance R2,3rd resistor
R3 and diode D forms the grid that soft one end for opening circuit 301 is connected to second switch U2, soft to open the another of circuit 301
One end, that is, diode D cathode is connected to the collector of second switch U2, and the soft other end for opening circuit 301 is also with first
The collector of switching tube U1 is connected.
Specifically, the first capacitor C1 in resonance compensation module 3 is for compensating resonant capacitance parameter, when second
When switching tube U2 is connected, resonance compensation module 3 works in compensation model, increases the electric discharge of resonant inductance L1 Yu first capacitor C1
Circuit, first capacitor C1 can compensate resonant capacitance parameter, can reduce the crest voltage of resonance potential；Work as second switch
When U2 is turned off, resonance compensation module 3 works in non-compensation model, and first capacitor C1 is not that resonance modules 2 provide discharge loop, humorous
The inductance L1 that shakes only discharges to resonant capacitance C2, resonance potential promptly can be dropped to zero in this way, guarantee first switch tube U1 energy
It is enough to be connected from no-voltage when next harmonic period starts.
Zener diode ZD is used to carry out voltage clamping to the second end of second switch U2 and third end, protects second
Switching tube U2 prevents second switch U2 breakdown；First resistor R1 is for constituting the when electromagnetic heating apparatus stops working
The discharge loop of one capacitor C1, i.e., when electromagnetic heating apparatus stops working, if also remaining with charge in first capacitor C1, the
One resistance R1 provides discharge loop, and the charge of first capacitor C1 accumulation is imported resonance modules 2, stops electromagnetic heating apparatus
When work, first capacitor C1 is not charged, ensure that the safety that product is used and repaired；Second resistance R2,3rd resistor R3 and
Diode D forms soft circuit 301 of opening for realizing the soft open-minded of second switch U2, and second switch U2 is enable to accomplish zero
Voltage turn-on.
According to one embodiment of present invention, as shown in figure 5, electromagnetic heating control device further include: filter module 5, filter
For being filtered to the direct current after rectification, filter module 5 is connected between rectification module 1 and resonance modules 2 wave module 5.
Specifically, after the alternating current of 1 pair of rectification module input rectifies, the direct current that can be pulsed filters mould
The direct current that block 5 is pulsed is filtered available more straight direct current, and by more straight direct current electricity output to resonance modules
2。
A specific embodiment according to the present invention, as shown in Fig. 2, filter module 5 further includes the second inductance L2 and third
Capacitor C3.
Wherein, when rectification module 2 is rectifier bridge, one end of the second inductance L2 is connected with the first output end of rectifier bridge,
One end of third capacitor C3 is connected with the other end of the second inductance L2, the second output of the other end and rectifier bridge of third capacitor C3
End is grounded after being connected, and has third node D, third node D and 2 phase of resonance modules between third capacitor C3 and the second inductance
Even, for example, third node D is connected with one end of resonant inductance L1 in resonance modules 2.
Specifically, rectifier bridge may include first diode D1, the second diode D2, third diode D3 and the 4th diode
D4.The first output end as rectifier bridge after the cathode of first diode D1 is connected with the cathode of the second diode D2, the three or two
Second output terminal as rectifier bridge 21 after the anode of pole pipe D3 is connected with the anode of the 4th diode D4, the 4th diode D4's
The first input end that cathode is connected with the anode of first diode D1 as rectifier bridge 21, the anode and third of the second diode D2
Connected the second input terminal as rectifier bridge of the cathode of diode D3.
In addition, according to one embodiment of present invention, as shown in figure 5, electromagnetic heating control device further include: anti-interference mould
Block 6.Immunity module 6 is connected between rectification module 1 and the AC power source AC for providing alternating current.
In one particular embodiment of the present invention, as shown in Fig. 2, immunity module 6 includes: fuse F, the 4th electricity
Hinder R4 and the 4th capacitor C4.
Wherein, one end of fuse F is connected with one end of AC power source AC, and one end of the 4th resistance R4 is with fuse F's
The other end is connected, and the other end of the 4th resistance R4 is connected with the other end of AC power source AC, for example, one end of AC power source AC can
Think that firewire, the other end of AC power source AC can be zero curve；4th capacitor C4 is connected in parallel on the both ends of the 4th resistance R4.In addition,
One end of 4th resistance R4 is also connected with the first input end of such as rectifier bridge of rectification module 1, and the other end of the 4th resistance R4 is also
It is connected with the second input terminal of such as rectifier bridge of rectification module 1.
Another specific embodiment according to the present invention, as shown in figure 3, when resonant capacitance C2 and resonant inductance L1 series connection connects
When connecing, resonance compensation module 3 be may be provided among resonance modules 1.Shown in the electromagnetic heating control device and Fig. 2 of the embodiment
The main distinction of electromagnetic heating control device be that resonance compensation module 3 may be provided at resonant capacitance C2 and resonant inductance L1
Between, the input terminal of resonance compensation module 3 is connected with resonant inductance L1, the output end and resonant capacitance C2 of resonance compensation module 3
It is connected, resonant capacitance C2 is connected across between the both ends collector and emitter i.e. in parallel of first switch tube U1.In other words, second switch
The collector of pipe U2 is connected with the other end of resonant inductance L1, and the i.e. second resistance R2's of the soft other end for opening circuit 301 is another
One end of end resonant capacitance C2 is connected after being connected with the collector of first switch tube U1, the other end and the resonance electricity of first capacitor C1
The other end of appearance C2 is grounded after being connected, and one end of resonant capacitance C2 is connected with the collector of first switch tube U1, resonant capacitance C2
The other end be connected with the emitter of first switch tube U1.It then can be with the electromagnetic heating control in Fig. 2 embodiment for rest part
Device processed is almost the same, and which is not described herein again.
According to still another embodiment of the invention, as shown in figure 4, when resonant capacitance C2 and resonant inductance L1 is connected in parallel
When, resonance compensation module 3 is connected on two common ends of resonant capacitance C2 and resonant inductance L1 parallel connection.The electromagnetism of the embodiment
Heating control apparatus and electromagnetic heating control device shown in Fig. 2 be not mainly, one end of resonant inductance L1 and resonance
One end of capacitor C2 is connected, and the other end of resonant inductance L1 is connected with the other end of resonant capacitance C2, also, resonance compensation module
3 is in parallel with resonant inductance L1 and resonant capacitance C2, in other words, the first end of second switch U2 respectively with resonant inductance L1 one
End be connected with one end of resonant capacitance C2, the other end of first capacitor C1 respectively with the other end and resonant capacitance of resonant inductance L1
The other end of C2 is connected, and the soft other end for opening circuit 301 is connected afterwards and first switch tube U1 with the other end of first capacitor C1
Collector be connected, that is, the other end of second resistance R2 and the cathode of diode D are connected with the other end of first capacitor C1,
And the node between the cathode of diode D and the other end of first capacitor C1 is second node A.It then can be with for rest part
Electromagnetic heating control device in Fig. 2 embodiment is almost the same, and which is not described herein again.
It is described in detail referring to the electromagnetic heating control device course of work of Fig. 2-Fig. 4 to the embodiment of the present invention.
Control module 4 drives the conducting and shutdown of first switch tube U1 by output pwm signal, when control module 4 drives first switch
When pipe U1 is connected, the electric current of resonant inductance L1 becomes larger and energy storage；When control module 4 drives first switch tube U1 shutdown, resonance
Capacitor C2 discharges to resonant inductance L1, second node A (i.e. one end of resonant inductance L1 and second switch U2 in Fig. 2 and Fig. 3
Node in node or Fig. 4 between collector between the cathode of diode D and the other end of first capacitor C1) voltage
Increase, the voltage of first node B (node i.e. between one end of first capacitor C1 and the emitter of second switch U2) also with
The raising of the voltage of second node A and increase, when resonant capacitance C2 is discharged, the grid of first node A, second switch U2
The voltage of pole C point and third node D (node i.e. between one end of the second inductance L2 and third capacitor C3) are all the same, resonance electricity
The electric current for feeling L1 is maximum.
Then, resonant inductance L1 discharges to resonant capacitance C2, and the grid C point voltage of second switch U2 persistently rises, this
When due to zener diode ZD effect first node B voltage it is clamped, the voltage of the grid C of second switch U2 is with second
The voltage of node A increases, and then causes second switch U2 to be connected, and in turn on process, because first node B i.e. second opens
The voltage for closing the emitter of pipe U2 is clamped, does not have forward voltage between the collector and emitter of second switch U2, and second
Switching tube U2 is no-voltage conducting, and first capacitor C1 compensates the capacitance parameter of the resonant capacitance C2 of resonance modules 2, resonance
Inductance L1 not only discharges to resonant capacitance C2, while also discharging first capacitor C1, when the electric energy of resonant inductance L1 discharges, resonance
The electric energy of capacitor C2 and first capacitor C1 are maximum.
Then, resonant capacitance C2 and first capacitor C1 declines to resonant inductance L1 back discharge, the voltage of second node A,
As resonant capacitance C2 and first capacitor C1 discharge off, resonant inductance L1 is reversely put to resonant capacitance C2 and first capacitor C1 again
The voltage of electricity, second node A continues to decline, and the voltage of the grid C point of second switch U2 also declines, when the voltage of grid C point
When voltage lower than first node B, i.e., when the grid voltage of second switch U2 is lower than emitter voltage, second switch U2
Shutdown.At this point, resonant inductance L1 only discharges to resonant capacitance C2, the voltage of second node A continues to decline, when second node A's
When voltage drops to zero, i.e. the collector and emitter equipotential of first switch tube U1, between first switch tube U1 and ground quite
It is connected in the freewheeling diode of conducting wire, first switch tube U1, the current potential of second node A is clamped, the remaining energy of resonant inductance L1
Amount is released by first switch tube U1.At this moment, entire resonant process completes a cycle, and then, first switch tube U1 is again
It is connected in no-voltage, into next harmonic period.Also, since in entire harmonic period, second switch U2 works soft
Opening state, first switch tube U1 are also connected in voltage zero-cross, so the loss of switching device is smaller.
As a result, in the above resonant process, second switch U2 increases first capacitor C1 and resonant inductance L1 when being connected
Discharge loop, the crest voltage of resonance potential can be effectively reduced, the upper limit of power bracket when improving laser heating
Value, improves the accessible maximum power of electromagnetic heating apparatus；After second switch U2 is closed, resonant inductance L1 is only to resonance electricity
Hold C2 electric discharge, so as to which resonance potential is promptly dropped to zero, guarantees that first switch tube U1 can be opened in next harmonic period
It can be connected from no-voltage when the beginning, reduce the loss of switching tube, reduced the lower limit value of power bracket, enable electromagnetic heating apparatus
Lower-wattage heating is carried out, particularly, when the parameter value of resonant capacitance C2 is smaller, continuous low power heating may be implemented.
To sum up, the electromagnetic heating control device proposed according to embodiments of the present invention, when the first switch tube is turned on, by humorous
Vibration compensating module compensates the capacitance parameter of resonant capacitance, resonant peak voltage is effectively reduced, namely reduce first switch
The crest voltage of pipe improves the accessible maximum power of electromagnetic heating apparatus to improve the Upper Bound Power of laser heating；
When first switch tube is closed, quickly resonance potential can be made to be reduced to zero, guarantee that first switch tube is able to achieve no-voltage conducting, from
And the loss of first switch tube is reduced, the lower limit value of power bracket when reducing laser heating that is to say and expand sustainable add
The power bracket of heat.
The embodiment of the present invention also proposed a kind of electromagnetic heating apparatus, comprising: above-mentioned electromagnetic heating control device.Its
In, electromagnetic heating apparatus can be electromagnetic oven, electric cooker or electric pressure cooking saucepan etc..
The electromagnetic heating apparatus proposed according to embodiments of the present invention guarantees electromagnetic heating by electromagnetic heating control device
Switching tube in control device is able to achieve no-voltage conducting, so that the loss of switching tube is reduced, function when improving continuous heating
The upper limit value of rate range, the lower limit value of power bracket when reducing continuous heating expand power bracket when continuous heating, reduce
The turn-on consumption of switchable pipe reduces the difficulty of system radiating, meets the diversified culinary art demand of user.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can be it is any may include, store, communicating, propagating or
Transfer program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment
Device.The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings
Electrical connection section (electronic device), 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 on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (8)
1. a kind of electromagnetic heating control device characterized by comprising
Rectification module, the rectification module is for rectifying to export direct current the alternating current of input；
Resonance modules, the resonance modules include resonant capacitance and resonant inductance, humorous for being electrically generated according to the direct current after rectification
Shake voltage, wherein the resonant capacitance and resonant inductance series connection or the resonant capacitance and resonance inductance in parallel connect
It connects；
Resonance compensation module, the resonance compensation module are connected with the resonant inductance and are connected in parallel with the resonant capacitance,
It is compensated for the capacitance parameter to resonant capacitance in the resonance modules；
First switch tube, the first switch tube are connected with the resonance compensation module；And
Control module, the control module control the first switch tube；
Wherein, the resonance compensation module includes:
First capacitor and second switch, wherein when the resonant capacitance and resonant inductance are connected in series, the second switch
The first end of pipe is connected on the node between resonant inductance and the resonant capacitance, the second end of the second switch and institute
The one end for stating first capacitor is connected, and the other end of the first capacitor is connected with the other end of the resonant capacitance, and described second
There is first node between switching tube and the first capacitor, alternatively, when the resonant capacitance is connected with resonance inductance in parallel,
The first end of the second switch is connected with one end of one end of the resonant inductance and the resonant capacitance respectively, and described
The second end of two switching tubes is connected with one end of the first capacitor, and the other end of the first capacitor is electric with the resonance respectively
The other end of sense is connected with the other end of the resonant capacitance, has first between the second switch and the first capacitor
Node；
First resistor, the first resistor are connected in parallel between the third end of the second switch and second end；
Zener diode, the zener diode is in parallel with the first resistor, the cathode of the zener diode and described the
The third end of two switching tubes is connected, and the anode of the zener diode is connected with the second end of the second switch；
Soft to open circuit, described soft one end for opening circuit is connected with the third end of the second switch, described soft to open electricity
The other end on road is connected with the first switch tube.
2. electromagnetic heating control device as described in claim 1, which is characterized in that when the resonant capacitance and resonant inductance string
When connection connection, the resonance compensation module is arranged between the resonant capacitance and the resonant inductance, the resonance compensation mould
The input terminal of block is connected with the resonant inductance, and the output end of the resonance compensation module is connected with the resonant capacitance, described
Resonant capacitance is connected across the both ends of the first switch tube.
3. electromagnetic heating control device as described in claim 1, which is characterized in that the soft circuit of opening includes:
Second resistance, one end of the second resistance are connected with the third end of the second switch, the second resistance it is another
One end is connected with the first switch tube；
Concatenated 3rd resistor and diode, the cathode of the diode are connected with the other end of the second resistance, and described two
The anode of pole pipe is connected with one end of the 3rd resistor, the other end and the third end phase of second switch of the 3rd resistor
Even.
4. electromagnetic heating control device as described in claim 1, which is characterized in that further include:
Filter module, for being filtered to the direct current after the rectification, the filter module is connected to the filter module
Between the rectification module and the resonance modules.
5. electromagnetic heating control device as claimed in claim 4, which is characterized in that the filter module further includes the second inductance
With third capacitor,
When the rectification module is rectifier bridge, one end of second inductance is connected with the first output end of the rectifier bridge,
One end of the third capacitor is connected with the other end of second inductance, the other end and the rectifier bridge of the third capacitor
Second output terminal be connected after be grounded, between the third capacitor and second inductance have third node, the third
Node is connected with the resonance modules.
6. electromagnetic heating control device as described in claim 1, which is characterized in that wherein, the first switch tube and described
Second switch is metal-oxide-semiconductor or IGBT.
7. electromagnetic heating control device as described in claim 1, which is characterized in that further include:
Immunity module, the immunity module be connected to the rectification module and provide the alternating current AC power source it
Between, wherein the immunity module includes fuse, the 4th resistance and the 4th capacitor, one end of the fuse and the friendship
The one end in galvanic electricity source is connected, and the other end of the fuse is connected with one end of the 4th resistance, the 4th resistance it is another
One end is connected with the other end of the AC power source, and the 4th capacitor is connected in parallel on the both ends of the 4th resistance.
8. a kind of electromagnetic heating apparatus characterized by comprising
Such as the described in any item electromagnetic heating control devices of claim 1-7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410499975.3A CN105517216B (en) | 2014-09-25 | 2014-09-25 | Electromagnetic heating control device and electromagnetic heating apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410499975.3A CN105517216B (en) | 2014-09-25 | 2014-09-25 | Electromagnetic heating control device and electromagnetic heating apparatus |
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| CN105517216A CN105517216A (en) | 2016-04-20 |
| CN105517216B true CN105517216B (en) | 2019-04-02 |
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| CN108075628A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic compatibility wave filter and household electrical appliance |
| CN108075627A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic compatibility wave filter and household electrical appliance |
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| CN204145789U (en) * | 2014-09-25 | 2015-02-04 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic Heating control device and electromagnetic heating apparatus |
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| CN201805366U (en) * | 2010-08-27 | 2011-04-20 | 吕真 | Circuit for improving energy efficiency of electromagnetic oven and microwave oven |
| CN102548074B (en) * | 2012-01-13 | 2014-04-02 | 深圳麦格米特电气股份有限公司 | Single-tube resonance soft switch circuit of induction cooker and control method thereof |
| CN203104830U (en) * | 2012-12-31 | 2013-07-31 | 美的集团股份有限公司 | Electromagnetic heating apparatus |
| CN203708523U (en) * | 2013-12-20 | 2014-07-09 | 美的集团股份有限公司 | Control circuit for electromagnetic heating device and electromagnetic heating device |
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| CN204145789U (en) * | 2014-09-25 | 2015-02-04 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic Heating control device and electromagnetic heating apparatus |
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