CN109028181A - A kind of single tube electromagnetic oven circuit and single tube electromagnetic oven control method - Google Patents
A kind of single tube electromagnetic oven circuit and single tube electromagnetic oven control method Download PDFInfo
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- CN109028181A CN109028181A CN201810751138.3A CN201810751138A CN109028181A CN 109028181 A CN109028181 A CN 109028181A CN 201810751138 A CN201810751138 A CN 201810751138A CN 109028181 A CN109028181 A CN 109028181A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
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Abstract
Single tube electromagnetic oven circuit disclosed by the invention, rectification circuit in the prior art, single tube electromagnetic oven main circuit, wherein single tube electromagnetic oven main circuit includes the LC oscillating circuit for converting electrical energy into electromagnetic energy, on the basis of the driving circuit of the connection of LC oscillating circuit and the controller being connect with driving circuit, it further include the no-voltage for detecting the input terminal of single tube electromagnetic oven main circuit and no-voltage detection circuit connected to the controller, and it is directly connect with the DC terminal of rectification circuit by the input terminal of single tube electromagnetic oven main circuit or silicon-controlled by being arranged in rectification circuit, to after powered up, the input terminal of single tube electromagnetic oven main circuit is set to generate no-voltage, the start and stop of single tube electromagnetic oven main circuit are controlled when voltage is zero, to the rush of current of driving circuit when not only eliminating starting, reduce the damage to driving circuit It is bad, also reduce the noise generated when stopping.The present invention also provides corresponding single tube electromagnetic oven control methods, have above-mentioned beneficial effect.
Description
Technical field
The present invention relates to technical field of electric appliances, more particularly to a kind of single tube electromagnetic oven circuit and single tube electromagnetic oven controlling party
Method.
Background technique
Electromagnetic oven is a kind of common electric appliance, easy to use, safe, and energy conversion efficiency is high, in daily life, business
There is a large amount of application in culinary art and industry.
Common single tube electromagnetic oven carries out power control using method of the pulsewidth modulation in conjunction with discontinuous operation, high-power
The method of Shi Caiyong pulsewidth modulation controls power, controls mean power using the method for discontinuous operation when small-power.
Fig. 1 is a kind of schematic diagram of single-phase single-tube electromagnetic oven circuit in the prior art.Fig. 2 is a kind of three-phase in the prior art
The schematic diagram of single tube electromagnetic oven circuit.As depicted in figs. 1 and 2, single tube electromagnetic oven in the prior art includes rectification circuit (by two
Pole pipe composition), filter circuit (inductance L1 and capacitor C1), first end and the filter circuit connecting with the DC terminal of rectification circuit connect
The LC oscillating circuit (inductance L2 and capacitor C2) connect, driving circuit (the switch Q1 and two being connect with the second end of LC oscillating circuit
Pole pipe D1), wherein resistance R1 is the equivalent resistance of electromagnetic oven load.In the state that single tube electromagnetic oven is powered but shuts down, capacitor
The both ends C1 keep the crest voltage of alternating current, and capacitor C2 both end voltage is zero.Start operating instant in electromagnetic oven, switch Q1 is led
Logical, capacitor C1 and capacitor C2 form parallel connection, and capacitor C2 can form great short-circuit impact electric current by switch Q1 quick charge,
Very big electromagnetic interference is not only generated, but also switch Q1 can be damaged.So single tube electromagnetic oven in the prior art cannot be frequent
Ground, which is switched on, shuts down, and when adjusting the power of electromagnetic oven using discontinuous operation method, the resting period is up to tens seconds, imitates to using
Fruit generates very big negative effect.
Dash current caused by how reducing single tube electromagnetic oven during driving circuit start and stop, to reduce to drive
The damage of dynamic circuit, further increases the control effect of single tube electromagnetic oven, is that those skilled in the art need the technology solved to ask
Topic.
Summary of the invention
The object of the present invention is to provide a kind of single tube electromagnetic oven circuit and single tube electromagnetic oven control methods, for reducing single tube
Electromagnetic oven during driving circuit start and stop caused by dash current subtract simultaneously to reduce damage to driving circuit
The noise generated in few driving circuit stopped process, further increases the control effect of single tube electromagnetic oven.
In order to solve the above technical problems, the present invention provides a kind of single tube electromagnetic oven circuit, including rectification circuit, single tube electromagnetism
Furnace main circuit and controller, wherein the single tube electromagnetic oven main circuit includes vibrating electricity for converting electrical energy into the LC of electromagnetic energy
Road, the driving circuit connecting with the second end of the LC oscillating circuit, the driving circuit are connect with the controller, further include
The one zero electricity for detecting the voltage over zero of the input terminal of the single tube electromagnetic oven main circuit and being connect with the controller
Press detection circuit；
The input terminal of the single tube electromagnetic oven main circuit is connect with the DC terminal of the rectification circuit；
The controller is used to detect the input terminal of the single tube electromagnetic oven main circuit in the no-voltage detection circuit
The single tube electromagnetic oven main circuit is controlled when appearance voltage over zero to start or stop.
It optionally, further include the first voltage detection circuit for being set to the rectification circuit；
The rectification circuit is specially rectified three-phase circuit, and wherein two-phase is diode circuit, and another phase is silicon-controlled
Circuit, the first voltage detection circuit are set to the diode circuit；
Correspondingly, the controller is also used to detect the friendship of the diode circuit when the first voltage detection circuit
When galvanic electricity pressure reaches peak value, the silicon-controlled of the ghyristor circuit is turned off or opened.
It optionally, further include the second voltage detection for being set to the DC terminal of the rectification circuit and being connect with the controller
Circuit；
The second voltage detection circuit includes the capacitor connecting with the positive voltage terminal of the DC terminal of the rectification circuit, point
The resistance not connect with the negative voltage side of the DC terminal of the capacitor and the rectification circuit；
The controller is also used to according to the pulse voltage obtained by the pulsating volage shaping at the resistance both ends
Rising edge or failing edge drive the single tube electromagnetic oven main circuit to synchronize work as synchronous triggering signal.
Optionally, further include set on the rectification circuit DC terminal and connect with the controller, for detecting
State the tertiary voltage detection circuit of the voltage peak of DC terminal；
The controller is also used to stop the main electricity of single tube electromagnetic oven when the voltage peak is greater than preset voltage value
The work on road.
Optionally, further include set on the rectification circuit DC terminal and connect with the controller, for detecting
State the 4th voltage detecting circuit of the voltage peak of DC terminal；
The controller is also used to that the voltage peak is converted to the temperature of load according to preset transformational relation,
And the power of the single tube electromagnetic oven main circuit is adjusted according to the temperature.
In order to solve the above technical problems, the present invention also provides a kind of single tube electromagnetic oven control method, based on above-mentioned any one
Single tube electromagnetic oven circuit described in, comprising:
Controller receives the voltage of the first no-voltage detection circuit detection after receiving start command or ceasing and desisting order
Value；
When the controller receives the input of the single tube electromagnetic oven main circuit of the first no-voltage detection circuit detection
When no-voltage occurs in end, controls the single tube electromagnetic oven main circuit and start or stop work.
In order to solve the above technical problems, the present invention also provides a kind of single tube electromagnetic oven circuit, including rectification circuit, single tube electricity
Magnetic furnace main circuit, controller and the filter circuit between the rectification circuit and the single tube electromagnetic oven main circuit,
Described in single tube electromagnetic oven main circuit include first end connect with the filter circuit, second end and driving circuit connection be used for
The LC oscillating circuit and the driving circuit of electromagnetic energy are converted electrical energy into, the driving circuit is connect with the controller,
It further include for detecting alternating current no-voltage and the second no-voltage detection circuit connected to the controller；
The rectification circuit includes silicon-controlled and diode；
The controller is by controlling the silicon-controlled on-off so that the input of the single tube electromagnetic oven main circuit is brought out
Existing no-voltage starts or stops work with control the single tube electromagnetic oven main circuit.
It optionally, further include no-voltage for detecting the input terminal of single tube electromagnetic oven main circuit and connected to the controller
First no-voltage detection circuit；
When no-voltage occurs in the input terminal of the single tube electromagnetic oven main circuit, the controller controls the single tube electromagnetism
Furnace main circuit starts or stops.
Optionally, the rectification circuit is specially rectified three-phase circuit, each mutually silicon-controlled by a diode and one
Composition.
In order to solve the above technical problems, the present invention also provides a kind of single tube electromagnetic oven control method, based on above-mentioned any one
Single tube electromagnetic oven circuit described in, comprising:
Controller is when receiving pause command or start command, by making the main electricity of single tube electromagnetic oven to silicon-controlled control
There is no-voltage in the input terminal on road；
When no-voltage occurs in the input terminal that the controller receives the single tube electromagnetic oven main circuit detected, control is single
Pipe electromagnetic oven main circuit starts or stops.
A kind of single tube electromagnetic oven circuit provided by the invention, in addition to rectification circuit, single tube electromagnetic oven main circuit and controller,
Wherein single tube electromagnetic oven main circuit include LC oscillating circuit for converting electrical energy into electromagnetic energy and with LC oscillating circuit
The driving circuit of second end connection, driving circuit further include for detecting single tube electromagnetic oven main circuit outside connecting with controller
The voltage over zero of input terminal and the first no-voltage detection circuit connected to the controller, and single tube electromagnetic oven main circuit is defeated
Enter end directly to connect with the DC terminal of rectification circuit, to after powered up, can generate in the input terminal of single tube electromagnetic oven main circuit
Voltage over zero.
Another kind single tube electromagnetic oven circuit provided by the invention, in addition to rectification circuit, filter circuit, the main electricity of single tube electromagnetic oven
Road and controller, wherein single tube electromagnetic oven main circuit includes the LC oscillating circuit and and LC for converting electrical energy into electromagnetic energy
Oscillating circuit second end connection driving circuit, driving circuit connection controller outside, further include for detecting single tube electromagnetism
No-voltage the second no-voltage detection circuit of the input terminal of furnace main circuit, and rectification circuit include it is silicon-controlled, pass through controller control
Silicon-controlled on-off is made, the input terminal of single tube electromagnetic oven main circuit can be made to generate no-voltage.
It, can be in single tube electromagnetic oven main circuit on the basis of two kinds of single tube electromagnetic oven circuits provided in an embodiment of the present invention
Input terminal voltage control single tube electromagnetic oven main circuit starting when being zero, or single tube electromagnetic oven master is made by silicon-controlled control
Circuit start and stop reduce the damage to driving circuit to eliminate Startup time to the rush of current of driving circuit, while
Driving circuit is controlled when the input terminal voltage of single tube electromagnetic oven main circuit is zero to stop, and reduces noise.Further, due to subtracting
Small impact of the start-up course to driving circuit, when adjusting the power of single tube electromagnetic oven using discontinuous operation method, Ke Yi great
Shorten its resting period greatly, to keep power control more balanced, strengthens the control effect of single tube electromagnetic oven, improve user
Experience.The present invention also provides a kind of single tube electromagnetic oven control methods, have above-mentioned beneficial effect.
Detailed description of the invention
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present invention or the prior art
Attached drawing needed in technical description is briefly described, it should be apparent that, the accompanying drawings in the following description is only this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of schematic diagram of single-phase single-tube electromagnetic oven circuit in the prior art；
Fig. 2 is a kind of schematic diagram of Three-phase Single-transistor electromagnetic oven circuit in the prior art；
Fig. 3 is a kind of schematic diagram of single-phase single-tube electromagnetic oven circuit provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of the first Three-phase Single-transistor electromagnetic oven circuit provided in an embodiment of the present invention；
Fig. 5 is a kind of flow chart of single tube electromagnetic oven control method provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of another single-phase single-tube electromagnetic oven circuit provided in an embodiment of the present invention；
Fig. 7 is the schematic diagram of second of Three-phase Single-transistor electromagnetic oven circuit provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of the third Three-phase Single-transistor electromagnetic oven circuit provided in an embodiment of the present invention；
Fig. 9 is the flow chart of another single tube electromagnetic oven control method provided in an embodiment of the present invention.
Specific embodiment
Core of the invention is to provide a kind of single tube electromagnetic oven circuit and single tube electromagnetic oven control method, for reducing single tube
Electromagnetic oven single tube electromagnetic oven main circuit starting during caused by dash current, thus reduce to the main electricity of single tube electromagnetic oven
The damage on road, while the noise generated in single tube electromagnetic oven main circuit stopped process is reduced, further increase single tube electromagnetic oven
Control effect.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.It should be noted that embodied in the attached drawing of the embodiment of the present invention only
The circuit of the embodiment of the present invention illustrates or equivalent circuit, is not covered by whole elements of circuit provided by the embodiment of the present invention
And connection relationship.
Fig. 3 is a kind of schematic diagram of single-phase single-tube electromagnetic oven circuit provided in an embodiment of the present invention.
Single tube electromagnetic oven circuit provided in an embodiment of the present invention includes rectification circuit, single tube electromagnetic oven main circuit and control
Device, wherein single tube electromagnetic oven main circuit includes for converting electrical energy into the LC oscillating circuit of electromagnetic energy and LC oscillating circuit
The driving circuit of second end connection, it further includes for detecting the defeated of single tube electromagnetic oven main circuit that driving circuit is connect with controller
Enter the voltage over zero at end and the first no-voltage detection circuit connected to the controller；
The input terminal of single tube electromagnetic oven main circuit and the DC terminal of rectification circuit connect；
Controller is used to detect that voltage occurs in the input terminal of single tube electromagnetic oven main circuit in the first no-voltage detection circuit
Single tube electromagnetic oven main circuit is controlled when zero crossing to start or stop.
From Fig. 1 and Fig. 2 it can be seen that, single tube electromagnetic oven main circuit in the prior art (including LC oscillating circuit and drive
Dynamic circuit etc.) it is connected to after filter circuit (including inductance L1 and capacitor C1), in the state that single tube electromagnetic oven is powered but shuts down
When, the both ends capacitor C1 keep the crest voltage of alternating current, and capacitor C2 both end voltage is zero.Start operating instant in electromagnetic oven, opens
Q1 conducting is closed, capacitor C1 and capacitor C2 form parallel connection, and capacitor C2 can form great short-circuit impact by switch Q1 quick charge
Electric current not only generates very big electromagnetic interference, but also can damage switch Q1；Meanwhile shutdown is opened when electric current is excessive in circuit
Q1 is closed, loud noise can be also generated.In addition, due to the presence of capacitor C1 in filter circuit, in LC oscillating circuit resonant process,
Some invalid electric current flows through inductance L2 and switch Q1, then the direct current of rectification circuit is returned by diode D1 and inductance L2
End, this portion of electrical current form invalid thermal losses in inductance L2, switch Q1 and diode D1, reduce the whole effect of electromagnetic oven
Rate.
As shown in figure 3, rectification circuit is constituted by a diode, exchange end connects power supply, and DC terminal is directly connected to single tube electromagnetism
Furnace main circuit.Single tube electromagnetic oven main circuit is mainly by LC oscillating circuit (including inductance L2 and capacitor C2), switch Q1 and diode
The driving circuit of D1 composition is constituted, and the base stage of switch Q1 connects controller (non-table in Fig. 3), and controller (non-table in Fig. 3) passes through
The mode control switch Q1 of the pulse train of output pulse width modulation, starting electromagnetic oven main circuit are worked normally, and stopping is passed through
The mode control switch Q1 of output pulse width modulated pulse trains stops the work of electromagnetic oven main circuit.First no-voltage detection electricity
Road specifically can be set in the exchange end of rectification circuit, for detecting alternating voltage zero-crossing point, correspondingly, when electricity occurs in exchange end
When pressing through zero point, also there is no-voltage in the input terminal (DC terminal) of single tube electromagnetic oven main circuit.The structure of no-voltage detection circuit
And specific connection can refer to the prior art, this embodiment is not repeated.
Alternating current is by being converted into 100HZ Rectified alternating current after rectification circuit, in the input of single tube electromagnetic oven main circuit
There is voltage in end at the time of be 0, therefore controller can control driving circuit and start or stop at this moment, flow through in driving circuit
The electric current of switch Q1 gradually risen since 0, reduce the rush of current to switch Q1.
It further, can also include exchange end and the single tube electromagnetic oven for being set to rectification circuit in single tube electromagnetic oven circuit
Filter circuit (including inductance L3 and capacitor C3) between power connector end.
Single tube electromagnetic oven circuit provided in an embodiment of the present invention in addition to rectification circuit, includes LC oscillating circuit, driving circuit
Single tube electromagnetic oven main circuit and controller outside, further include the first no-voltage detection circuit.On this basis, by by single tube
The input terminal of electromagnetic oven main circuit is directly connect with the DC terminal of rectification circuit, the input terminal of single tube electromagnetic oven main circuit occurs
Voltage over zero, in the starting of voltage over zero control driving circuit, to eliminate Startup time to the electric current of driving circuit
Impact, reduces the damage to driving circuit；In the stopping of voltage over zero control driving circuit, noise is also greatly reduced.
Further, due to eliminating impact of the start-up course to driving circuit, single tube electromagnetic oven is being adjusted using discontinuous operation method
Power when, its resting period can be greatly shortened, to keep power control more balanced, strengthen the control of single tube electromagnetic oven
Effect improves user experience.
Fig. 4 is the schematic diagram of the first Three-phase Single-transistor electromagnetic oven circuit provided in an embodiment of the present invention.
On the basis of the above embodiments, in another embodiment, single tube electromagnetic oven circuit further includes being set to rectification circuit
First voltage detection circuit；Rectification circuit is specially rectified three-phase circuit, and wherein two-phase is diode circuit, and another phase is
Ghyristor circuit, first voltage detection circuit are set to diode circuit；Correspondingly, controller is also used to when first voltage detection electricity
When road detects that the alternating voltage of diode circuit reaches peak value, the silicon-controlled of ghyristor circuit is turned off or opened.
As shown in figure 4, on the basis of the above embodiments, when rectification circuit is rectified three-phase circuit, filter circuit by
Three inductance (L4, L5 and L6) and three capacitor (C4, C5, C6) compositions.Wherein two-phase is by diode group to rectified three-phase circuit
At diode circuit, another phase be by Group of Silicon Controlled Rectifier at ghyristor circuit.
When needing to suspend electromagnetic oven work, firstly, connecting four by first voltage detection circuit (non-table in Fig. 4)
When the two-phase voltage of diode reaches maximum value, so that two silicon-controlled are in is continued off state, can also be detected with first voltage
Circuit detects after no-voltage 5 milliseconds (60HZ alternating current is 4.17 milliseconds), connects the two-phase voltage of four diodes at this time
When reaching maximum value, so that two silicon-controlled are in is continued off state, single-phase alternating current power supply is equivalent at this time, in this blow-up
There is no-voltage in the voltage over zero of galvanic electricity, i.e. single tube electromagnetic oven main circuit both ends, stop making list to the driving of switch Q1 at this time
Pipe electromagnetic oven main circuit break-off.When starting electromagnetic oven work, in the voltage over zero of single-phase alternating current, i.e. single tube electromagnetic oven
There is no-voltage in main circuit both ends, drive at this time to Q1, so that single tube electromagnetic oven main circuit is started work, work as single-phase alternating current
After voltage reaches maximum value, driving two is silicon-controlled, is at constant conduction state.
It, can also be by being set to two poles other than using the first no-voltage detection circuit detection no-voltage in the present embodiment
The crest voltage of the first voltage detection circuit detection of pipe circuit and turn off it is silicon-controlled after by 90 °, be 5 to 50Hz alternating current
Millisecond, it is believed that voltage over zero occurs in the input terminal of single tube electromagnetic oven main circuit, in this, as starting or stoping single tube electromagnetic oven
The foundation of main circuit.
, can be to avoid dash current when starting by above-mentioned control method, and may be implemented to turn by rapid starting/stopping
It changes, the ratio of electromagnetic oven work and pause time slot is adjusted, to realize the adjusting of electromagnetic oven mean power.
On the basis of the above embodiments, in another embodiment, single tube electromagnetic oven circuit further includes being set to rectification circuit
DC terminal and second voltage detection circuit connected to the controller；
Second voltage detection circuit includes the capacitor connecting with the positive voltage terminal of the DC terminal of rectification circuit, respectively with capacitor
The resistance connected with the negative voltage side of the DC terminal of rectification circuit；
Controller be also used to according to the rising edge of the pulse voltage obtained by the pulsating volage shaping at resistance both ends or
Failing edge drives single tube electromagnetic oven main circuit synchronous working as synchronous triggering signal.
In specific implementation, a capacitor is connected in the positive voltage terminal of the DC terminal of rectification circuit, the other end of capacitor connects
Connect the first end of a resistance, the negative voltage side of the DC terminal of the second end connection rectification circuit of resistance.When electromagnetic oven works, when
When switch Q1 is connected, electric current flows through inductance L2, switch Q1, and after switch Q1 shutdown, the inductance current of inductance L2 is reversed to capacitor C2
Charging, after the electric current of inductance L2 drops to 0, the backward voltage of capacitor C2 reaches maximum value, and then capacitor C2 passes through inductance again
L2 discharges, and after capacitor C2 discharge off, the inductance current of inductance L2 carries out positive charge, the forward direction at the both ends capacitor C2 to capacitor C2
Charging voltage can be higher than the output voltage of rectification circuit, and during this period, the both ends of resistance can generate a pulsating volage, in this arteries and veins
The lasting period of dynamic voltage, the voltage of switch Q1 collector are zero (actual value is -0.7V-0V)；This pulsating volage is carried out whole
Shape generates a pulse voltage, and controller selects the failing edge moment of this pulse as synchronization point, and driving switch Q1 makes out
Pass Q1 is in the conductive state, and the duration of switch Q1 conducting i.e. the work pulsewidth of electromagnetic oven, switch Q1 is turned off later.?
Next failing edge of pulse voltage is again connected switch Q1.Using the failing edge of the pulse voltage, as controller
Synchronous triggering signal drives the synchronous working of single tube electromagnetic oven main circuit, this kind of synchronous method circuit is simple, synchronous precision.Separately
Outside, synchronous triggering signal of the rising edge of this pulse voltage as controller can also be used, the advantage is that synchronous circuit
Rate request it is low, the disadvantage is that synchronization accuracy is slightly worse.
On the basis of the above embodiments, in another embodiment, single tube electromagnetic oven circuit further include respectively with rectified current
The tertiary voltage detection circuit of voltage peak that the DC terminal and controller on road connect, for detecting DC terminal；Controller
It is also used to stop when voltage peak is greater than preset voltage value the work of single tube electromagnetic oven main circuit.
When switch Q1 conducting, electric current flows through inductance L2, switch Q1, after switch Q1 shutdown, the inductance current pair of inductance L2
Capacitor C2 reverse charging, after the electric current of inductance L2 drops to 0, the backward voltage of capacitor C2 reaches maximum value, then capacitor C2
It is discharged again by inductance L2, after capacitor C2 discharge off, the inductance current of inductance L2 carries out positive charge to capacitor C2；Such as Fig. 1
Or shown in Fig. 2, due to the presence of capacitor C1, the positive charge voltage of capacitor C2 is not above the voltage at the both ends capacitor C1, also
It is the voltage that will not be higher by rectification circuit output.In the present embodiment, due to single tube electromagnetic oven main circuit directly with rectification circuit
DC terminal connection, the raising of the positive charge voltage at the both ends capacitor C2 will lead to rectification circuit cut-off, and will continue to increase.When
When electromagnetic oven surface is without pot or when pot is far from boiler face, since single tube electromagnetic oven main circuit is not lost substantially, capacitor C2 at this time
There are many output voltage that positive charge voltage can be higher by rectification circuit, that is, the crest voltage at rectifier both ends can be higher by rectification
The voltage value that device normally exports.The crest voltage at rectifier both ends is detected, can be in the electromagnetic oven course of work, quickly inspection in real time
Pot.And cookware used in electromagnetic oven is class ferrous metal, when the temperature rises, resistivity can increase, the resistance of equivalent resistance R1
Value reduces, and resonant tank loss becomes larger, and reduces so as to cause the positive charge voltage of capacitor C2, detects the peak value of this voltage, also
The temperature in the bottom of a pan can be conversed.
In specific implementation, tertiary voltage detection circuit is set in the DC terminal of rectification circuit, for detecting rectification circuit
The crest voltage of DC terminal, when peak voltage is greater than preset voltage value, (this preset voltage value is measured value of experiment, is generally existed
It is different due to the model of electromagnetic oven between 310V-1500V) when, it is judged as that no pot, controller control single tube electromagnetic oven main circuit
It stops working, thus the high voltage damage switch Q1 for avoiding oscillating circuit resonance from generating and other circuits.
On the basis of the above embodiments, in another embodiment, single tube electromagnetic oven circuit further includes being set to rectification circuit
DC terminal and voltage peak connected to the controller, for detecting DC terminal the 4th voltage detecting circuit；
Controller is also used to voltage peak is converted to the temperature of load, and according to temperature according to preset transformational relation
Degree adjusts the power of single tube electromagnetic oven main circuit.
In specific implementation, unlike tertiary voltage detection circuit, the detection of the 4th voltage detecting circuit is single tube
The occurrence of the voltage peak of the input terminal of electromagnetic oven main circuit.Alternatively, the 4th voltage detecting circuit and tertiary voltage detection electricity
Road can be same device, and controller is analyzed to obtain voltage peak, is respectively controlled according to the voltage value that it is measured.
Is generated by voltage-temperature table, is stored in previously according to experimental measurements for the single tube electromagnetic oven of a certain model
In controller.To which controller can convert the voltage value that the 4th voltage detecting circuit measures according to voltage-temperature table
To cooking bottom temperature, further according to cooking bottom temperature, adjust electromagnetic oven power, realize the temperature control to the bottom of a pan, avoid the bottom of a pan high temperature or
Person is burned when cooking or dry combustion method.
The corresponding each embodiment of single tube electromagnetic oven circuit as detailed above, on this basis, the invention also discloses with
The corresponding single tube electromagnetic oven control method of above-mentioned single tube electromagnetic oven circuit.
Fig. 5 is a kind of flow chart of single tube electromagnetic oven control method provided in an embodiment of the present invention.As shown in figure 5, being based on
On the basis of above-mentioned any one embodiment, single tube electromagnetic oven control method includes:
S10: controller receives the electricity of the first no-voltage detection circuit detection after receiving start command or ceasing and desisting order
Pressure value；
S20: when the input that controller receives the single tube electromagnetic oven main circuit of the first no-voltage detection circuit detection is brought out
When existing voltage over zero, control single tube electromagnetic oven main circuit starts or stops work.
Since the embodiment of single tube electromagnetic oven control method part and the embodiment of single tube electromagnetic oven circuit part are mutually right
It answers, therefore the embodiment of single tube electromagnetic oven control method part refers to the description of the embodiment of single tube electromagnetic oven circuit part,
Here it wouldn't repeat.
Fig. 6 is the schematic diagram of another single-phase single-tube electromagnetic oven circuit provided in an embodiment of the present invention.
Single tube electromagnetic oven circuit provided in an embodiment of the present invention, including rectification circuit, single tube electromagnetic oven main circuit, controller
And the filter circuit between rectification circuit and single tube electromagnetic oven main circuit, wherein single tube electromagnetic oven main circuit includes first
End connect with filter circuit, second end and driving circuit connect be used for convert electrical energy into electromagnetic energy LC oscillating circuit and
Driving circuit, driving circuit are connect with controller, further include for detecting alternating current no-voltage and connected to the controller second
No-voltage detection circuit；
Rectification circuit includes silicon-controlled and diode；
Controller is by controlling silicon-controlled on-off so that no-voltage occurs in the input terminal of single tube electromagnetic oven main circuit, with control
Single tube electromagnetic oven main circuit processed starts or stops work.
As shown in fig. 6, single tube electromagnetic oven circuit provided in an embodiment of the present invention is on the basis of existing technology, rectification circuit
It is made of silicon-controlled (SCR1 and SCR2 in such as figure) and diode, controller makes single tube electromagnetism by controlling silicon-controlled on-off
There is no-voltage in the input terminal of furnace main circuit.When needing break-off, controller suspends to two silicon-controlled drivings, at this time
Two are silicon-controlled, and one is in off state, and one is temporarily in the conductive state, when capacitor C1 both end voltage is zero, two
Silicon-controlled to be in off state, the input terminal voltage of single tube electromagnetic oven main circuit is zero at this time, and single tube electromagnetic oven main circuit is temporary
It stops work and makees, controller continues non-synchronously to drive single tube electromagnetic oven main circuit at this time.When needing to start work, in the 2nd 0 electricity
When pressure detection circuit detects exchange no-voltage, two silicon-controlled constant conductions are driven, single tube electromagnetic oven main circuit inputs at this time
End voltage is started from scratch risings, the start-up operation of single tube electromagnetic oven main circuit.
The control method of above-mentioned single tube electromagnetic oven circuit needs that the control circuit in single tube electromagnetic oven main circuit is allowed to protect always
The driving of the pulse single tube electromagnetic oven main circuit to driving circuit is held, is only controlled silicon-controlled.Itself the problem is that
When the voltage at single tube electromagnetic oven main circuit both ends is from above freezing liter, it is not easy to realize the synchronous working of main circuit.However single tube electromagnetism
Furnace must operate at synchronous regime again, for this purpose, single tube electromagnetic oven circuit can also include for detecting the main electricity of single tube electromagnetic oven
The no-voltage of the input terminal on road and the first no-voltage detection circuit connected to the controller.
In specific implementation, when needing break-off, when the second no-voltage detection circuit detects exchange no-voltage,
Controller pause to two silicon-controlled drivings, at this time two it is silicon-controlled be in off state, when the first no-voltage detection circuit
When detecting that no-voltage occurs in the input terminal of single tube electromagnetic oven main circuit, stops the driving to switch Q1, make single tube electromagnetic oven master
Circuit break-off.In the present embodiment, no-voltage is detected in the second no-voltage detection circuit, and after controlling silicon-controlled shutdown,
Because single tube electromagnetic oven main circuit works on, the voltage at the both ends of single tube electromagnetic oven main circuit can be reduced within a very short time
Zero, so detect no-voltage in the second no-voltage detection circuit, and after controlling silicon-controlled shutdown, postpone a setting time, i.e.,
Think that no-voltage occurs in the input terminal of single tube electromagnetic oven main circuit, therefore the entity circuit of the first no-voltage detection circuit can also be with
It is same circuit with the second no-voltage detection circuit.When needing to start work, detected in the second no-voltage detection circuit
The zero-acrross ing moment of single-phase alternating current, drive two silicon-controlled constant conductions, at this time single tube electromagnetic oven main circuit input terminal voltage from
Zero begins to ramp up, and the first no-voltage detection circuit detects that the voltage at single tube electromagnetic oven main circuit both ends is zero, at this time to switch
Q1 is driven, and single tube electromagnetic oven main circuit is made to start to work.
Another kind single tube electromagnetic oven circuit provided in an embodiment of the present invention, in addition to rectification circuit, filter circuit, single tube electromagnetism
Furnace main circuit and controller, wherein single tube electromagnetic oven main circuit include for convert electrical energy into the LC oscillating circuit of electromagnetic energy,
It further include for detecting alternating current no-voltage and being connect with controller outside the driving circuit being connect with the second end of LC oscillating circuit
The second no-voltage detection circuit, can also include the input terminal no-voltage for detecting single tube electromagnetic oven main circuit and with control
Device connection the first no-voltage detection circuit, and rectification circuit include it is silicon-controlled, silicon-controlled on-off is controlled by controller, can
So that the input terminal of single tube electromagnetic oven main circuit generates no-voltage.No-voltage is generated in the input terminal of single tube electromagnetic oven main circuit
When, controller control single tube electromagnetic oven main circuit starts and stops, to eliminate Startup time to the electric current of driving circuit
Impact, reduces the damage to driving circuit, while reducing noise when driving circuit stops.Further, due to reducing
Impact of the shutdown process to driving circuit can be significantly when adjusting the power of single tube electromagnetic oven using discontinuous operation method
Shorten its resting period, to keep power control more balanced, strengthens the control effect of single tube electromagnetic oven, improve user's body
It tests.
Fig. 7 is the schematic diagram of second of Three-phase Single-transistor electromagnetic oven circuit provided in an embodiment of the present invention.Fig. 8 is that the present invention is real
The schematic diagram of the third Three-phase Single-transistor electromagnetic oven circuit of example offer is provided.
On the basis of the above embodiments, in second of Three-phase Single-transistor electromagnetic oven circuit, rectification circuit is specially three-phase
Rectification circuit, wherein a phase is diode circuit, in addition two-phase is ghyristor circuit.
As shown in fig. 7, compared to Three-phase Single-transistor electromagnetic oven circuit in the prior art shown in Fig. 2, in the present embodiment, by
Four silicon-controlled (SCR3, SCR4, SCR5 and SCR6) and two diodes constitute controlled rectification circuit.The present embodiment is by inductance
The filter circuit that L1, capacitor C1 are constituted is located between the DC terminal of rectification circuit and single tube electromagnetic oven main circuit and shown in Fig. 4
The first single tube electromagnetic oven circuit provided in an embodiment of the present invention is compared, and the filter circuit in the present embodiment greatly simplifies.
In the present embodiment, the pause of single tube electromagnetic oven --- starting method are as follows: suspend to four silicon-controlled drivings, or
There is the zero passage voltage moment in A, B two-phase, pause drives SCR3, SCR4, when A, B two-phase voltage reach maximum value, i.e. A, B two
Phase voltage zero crossing postpones 90 degree, pause driving SCR5, SCR6；Or there is the zero passage voltage moment in A, C two-phase, pause is driven
Dynamic SCR5, SCR6, when A, C two-phase voltage reach maximum value, pause driving SCR3, SCR4；Described kind of silicon-controlled controlling party
Method can make the both ends C1 no-voltage occur.When C1 both end voltage is zero, i.e., there is zero electricity in single tube electromagnetic oven main circuit both ends
Pressure, stops the driving to Q1 at this time, makes single tube electromagnetic oven main circuit break-off；There is the exchange no-voltage moment in A, B two-phase,
SCR3, SCR4 constant conduction are driven, single tube electromagnetic oven main circuit both ends are no-voltage at this time, are driven to Q1, keep single tube electric
Magnetic furnace main circuit is started to work, and then when A, B two-phase voltage reach maximum value, i.e., A, B two-phase voltage zero crossing postpone 90 degree,
Make SCR5, SCR6 constant conduction；Or there is the exchange no-voltage moment in A, C two-phase, SCR5, SCR6 constant conduction are driven, this
The electromagnetic oven main circuit both ends Shi Danguan are no-voltage, are driven at this time to Q1, so that single tube electromagnetic oven main circuit is started to work, so
Afterwards when A, B two-phase voltage reach maximum value, make SCR3, SCR4 constant conduction.
The same with above-described embodiment, the present embodiment can not also set the first no-voltage detection circuit, only to silicon-controlled progress
The control, makes the voltage zero at single tube electromagnetic oven main circuit both ends, and control circuit is allowed to be always maintained to single tube electromagnetic oven master
The pulsed drive of circuit.
The present embodiment is merely illustrated by controlling controlled rectification circuit, realizes the input terminal in single tube electromagnetic oven main circuit
There is a kind of specific method of no-voltage, realizes the physical circuit of no-voltage and corresponding occur at single tube electromagnetic oven main circuit both ends
Control method can there are many.
In another embodiment, rectification circuit is specially rectified three-phase circuit, and each phase can by a diode and one
Control silicon composition.As shown in figure 8, rectification circuit includes three silicon-controlled (SCR7, SCR8 and SCR9), it is respectively arranged at A, B, C tri-
In circuitry phase.Its specific control mode is similar to Three-phase Single-transistor electromagnetic oven circuit shown in Fig. 7, and details are not described herein.
In the embodiment that above-mentioned power supply is three-phase alternating current, the common control method of rectification circuit are as follows: in the mistake of A, B phase
Zero point, controller control is silicon-controlled, and A, B two-phase is made to start constant conduction, when A, B phase voltage reach maximum value, controller control
It makes silicon-controlled, so that C phase is started constant conduction, begin to ramp up the voltage at single tube electromagnetic oven main circuit both ends from 0；In A, B phase electricity
When pressure reaches maximum value, controller control is silicon-controlled, turns off C phase persistently, then in the zero crossing of A, B phase, controller control
It is silicon-controlled, it turns off A, B two-phase persistently, the voltage at single tube electromagnetic oven main circuit both ends is made to drop to 0.
May be implemented the rectification circuit control method specific rectification circuit combination can there are many.
, can be to avoid dash current when starting by foregoing circuit and control method, and may be implemented by quick
Start and stop conversion adjusts the ratio of electromagnetic oven work and pause time slot, to realize the adjusting of electromagnetic oven mean power.
The corresponding each embodiment of single tube electromagnetic oven circuit as detailed above, on this basis, the invention also discloses with
The corresponding single tube electromagnetic oven control method of above-mentioned single tube electromagnetic oven circuit.
Fig. 9 is the flow chart of another single tube electromagnetic oven control method provided in an embodiment of the present invention.As shown in figure 9, base
On the basis of above-mentioned any one embodiment, single tube electromagnetic oven control method includes:
S20: controller is when receiving pause command or start command, by making single tube electromagnetic oven to silicon-controlled control
There is no-voltage in the input terminal of main circuit；
S21: when no-voltage occurs in the input terminal that controller receives the single tube electromagnetic oven main circuit detected, control is single
Pipe electromagnetic oven main circuit starts or stops.
Since the embodiment of single tube electromagnetic oven control method part and the embodiment of single tube electromagnetic oven circuit part are mutually right
It answers, therefore the embodiment of single tube electromagnetic oven control method part refers to the description of the embodiment of single tube electromagnetic oven circuit part,
Here it wouldn't repeat.
A kind of single tube electromagnetic oven circuit provided by the present invention and single tube electromagnetic oven control method have been carried out in detail above
It introduces.Each embodiment is described in a progressive manner in specification, and the highlights of each of the examples are implement with other
The difference of example, the same or similar parts in each embodiment may refer to each other.For the device disclosed in the embodiment,
Since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
It can.It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, may be used also
With several improvements and modifications are made to the present invention, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. a kind of single tube electromagnetic oven circuit, including rectification circuit, single tube electromagnetic oven main circuit and controller, wherein the single tube is electric
Magnetic furnace main circuit includes for converting electrical energy into the LC oscillating circuit of electromagnetic energy, connecting with the second end of the LC oscillating circuit
Driving circuit, the driving circuit connect with the controller, which is characterized in that further includes for detecting the single tube electromagnetism
The voltage over zero of the input terminal of furnace main circuit and the first no-voltage detection circuit being connect with the controller；
The input terminal of the single tube electromagnetic oven main circuit is connect with the DC terminal of the rectification circuit；
The controller is used to detect that the input terminal of the single tube electromagnetic oven main circuit occurs in the no-voltage detection circuit
The single tube electromagnetic oven main circuit is controlled when voltage over zero to start or stop.
2. single tube electromagnetic oven circuit according to claim 1, which is characterized in that further include set on the of the rectification circuit
One voltage detecting circuit；
The rectification circuit is specially rectified three-phase circuit, and wherein two-phase is diode circuit, and another phase is ghyristor circuit,
The first voltage detection circuit is set to the diode circuit；
Correspondingly, the controller is also used to detect the alternating current of the diode circuit when the first voltage detection circuit
When pressure reaches peak value, the silicon-controlled of the ghyristor circuit is turned off or opened.
3. single tube electromagnetic oven circuit according to claim 1, which is characterized in that further include set on the straight of the rectification circuit
Stream end and the second voltage detection circuit being connect with the controller；
The second voltage detection circuit includes the capacitor connecting with the positive voltage terminal of the DC terminal of the rectification circuit, respectively with
The resistance that the capacitor is connected with the negative voltage side of the DC terminal of the rectification circuit；
The controller is also used to the rising according to the pulse voltage obtained by the pulsating volage shaping at the resistance both ends
Edge or failing edge drive the single tube electromagnetic oven main circuit to synchronize work as synchronous triggering signal.
4. single tube electromagnetic oven circuit according to claim 1, which is characterized in that further include set on the straight of the rectification circuit
Flow the tertiary voltage detection circuit of end and voltage peak connect with the controller, for detecting the DC terminal；
The controller is also used to stop the single tube electromagnetic oven main circuit when the voltage peak is greater than preset voltage value
Work.
5. single tube electromagnetic oven circuit according to claim 1, which is characterized in that further include set on the straight of the rectification circuit
Flow the 4th voltage detecting circuit of end and voltage peak connect with the controller, for detecting the DC terminal；
The controller is also used to that the voltage peak is converted to the temperature of load, and root according to preset transformational relation
The power of the single tube electromagnetic oven main circuit is adjusted according to the temperature.
6. a kind of single tube electromagnetic oven control method, which is characterized in that based on the electricity of single tube described in claim 1 to 5 any one
Magnetic furnace circuit, comprising:
Controller receives the voltage value of the first no-voltage detection circuit detection after receiving start command or ceasing and desisting order；
When the input that the controller receives the single tube electromagnetic oven main circuit of the first no-voltage detection circuit detection is brought out
When existing no-voltage, controls the single tube electromagnetic oven main circuit and start or stop work.
7. a kind of single tube electromagnetic oven circuit, including rectification circuit, single tube electromagnetic oven main circuit, controller and it is set to the rectification
Filter circuit between circuit and the single tube electromagnetic oven main circuit, wherein the single tube electromagnetic oven main circuit include first end with
Filter circuit connection, second end and driving circuit connection LC oscillating circuit for converting electrical energy into electromagnetic energy and
The driving circuit, the driving circuit are connect with the controller, which is characterized in that further include for detecting zero electricity of alternating current
Pressure and the second no-voltage detection circuit connected to the controller；
The rectification circuit includes silicon-controlled and diode；
The controller is by controlling the silicon-controlled on-off so that the input terminal of the single tube electromagnetic oven main circuit occurs zero
Voltage starts or stops work with control the single tube electromagnetic oven main circuit.
8. single tube electromagnetic oven circuit according to claim 7, which is characterized in that further include for detecting single tube electromagnetic oven master
The no-voltage of the input terminal of circuit and the first no-voltage detection circuit connected to the controller；
When no-voltage occurs in the input terminal of the single tube electromagnetic oven main circuit, the controller controls the single tube electromagnetic oven master
Circuit starts or stops.
9. single tube electromagnetic oven circuit according to claim 7 or 8, which is characterized in that the rectification circuit is specially three-phase
Rectification circuit, it is each mutually by a diode and a Group of Silicon Controlled Rectifier at.
10. a kind of single tube electromagnetic oven control method, which is characterized in that based on the electricity of single tube described in claim 7 to 9 any one
Magnetic furnace circuit, comprising:
Controller is when receiving pause command or start command, by making single tube electromagnetic oven main circuit to silicon-controlled control
There is no-voltage in input terminal；
When there is no-voltage in the input terminal that the controller receives the single tube electromagnetic oven main circuit detected, control single tube electricity
Magnetic furnace main circuit starts or stops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810751138.3A CN109028181B (en) | 2018-07-10 | 2018-07-10 | Single-tube electromagnetic oven circuit and single-tube electromagnetic oven control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810751138.3A CN109028181B (en) | 2018-07-10 | 2018-07-10 | Single-tube electromagnetic oven circuit and single-tube electromagnetic oven control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115498746A (en) * | 2022-11-07 | 2022-12-20 | 广东希荻微电子股份有限公司 | Power supply circuit, power supply method and electronic equipment |
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| CN109028181B (en) | 2020-02-07 |
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