CN108376972A - Controllable impedance and household electrical appliance - Google Patents
Controllable impedance and household electrical appliance Download PDFInfo
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- CN108376972A CN108376972A CN201810387230.6A CN201810387230A CN108376972A CN 108376972 A CN108376972 A CN 108376972A CN 201810387230 A CN201810387230 A CN 201810387230A CN 108376972 A CN108376972 A CN 108376972A
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- inductor
- transformer
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-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
- H02H9/002—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off limiting inrush current on switching on of inductive loads subjected to remanence, e.g. transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of controllable impedance and household electrical appliance.Controllable impedance includes inductor, temperature-sensing element and control unit.Temperature-sensing element is used to sense the temperature of inductor, and control unit is used to adjust the inductance value of inductor according to the temperature of the collected inductor of temperature-sensing element.The invention also discloses a kind of household electrical appliance including above-mentioned controllable impedance.The controllable impedance and household electrical appliance of the present invention acquires the temperature of inductor by the way that temperature-sensing element is arranged; when inductor temperatures are excessively high, control unit can automatically adjust the coil turn of inductor to reduce magnetic flux density; current saturation can be prevented, plays the role of protecting electronic component.
Description
Technical field
The present invention relates to household electrical appliance technical fields, more specifically, are related to a kind of controllable impedance and household electrical appliance.
Background technology
In the related art, generally by being powered to load for electric installation, due to power attenuation, load is led because of fever
The raising of sensor ambient temperature is sent a telegraph, magnetic permeability declines, and with the increase of electric current, magnetic flux no longer increases, and induced electromotive force is also no longer
Increase, keep electronic component fever excessive, this prolonged high fever phenomenon is easy to burn electronic component.
Invention content
A kind of controllable impedance of embodiment of the present invention offer and household electrical appliance.
The controllable impedance of embodiment of the present invention includes：Inductor, temperature-sensing element and control unit, the temperature-sensing element are used
In the temperature for sensing the inductor, described control unit is used for the temperature according to the collected inductor of the temperature-sensing element
Degree adjusts the inductance value of the inductor.
In some embodiments, the inductor includes the first connecting pin, second connection end and adjustable side, the adjusting
End is between first connecting pin and the second connection end；
The controllable impedance includes the regulating switch for connecting described control unit, and the regulating switch connection described first connects
End and the adjustable side are connect, described control unit is for controlling the regulating switch to disconnect first connecting pin and the tune
It saves end and connects first connecting pin and the adjustable side.
In some embodiments, described control unit includes divider resistance, and the regulating switch includes first end and
The one end at two ends, the divider resistance connects power supply, and the other end of the divider resistance connects the first end and the temperature-sensitive
One end of element, one end of the temperature-sensing element connect ground terminal with the second end.
In some embodiments, described control unit is used for the temperature in the collected inductor of the temperature-sensing element
Degree controls the regulating switch and disconnects first connecting pin and the adjustable side when being less than preset temperature.
In some embodiments, described control unit is used for the temperature in the collected inductor of the temperature-sensing element
The regulating switch is controlled when degree is not less than the preset temperature connects first connecting pin and the adjustable side.
The household electrical appliance of embodiment of the present invention include for electric installation and connecting the load for electric installation, the power supply
Device includes filter module, and the filter module includes above-described controllable impedance.
In some embodiments, described for electric installation includes rectification module, transformer, switch module and control module,
The rectification module connects the rectification module for connecting alternating current source, the filter module, and the transformer connects the filter
Wave module, for providing on-off signal to the transformer, the control module is used for according to predetermined power the switch module
Generate the switching frequency that control signal controls the switch module to the switch module.
In some embodiments, the control module includes detection module and controller, and the detection module is used for base
It is detected in the alternating current source to obtain detection signal, and the detection signal is sent to the controller, the control
Device is used to control the switching frequency of the switch module based on the detection signal.
In some embodiments, the control module includes driving circuit, and the driving circuit connects the switching molding
Block and the controller, the driving circuit are used to control the switching molding according to the control signal that the controller exports
The switching frequency of block.
In some embodiments, described for electric installation includes the auxiliary transformer for connecting the control module, described auxiliary
Primary voltage of the transformer for detecting the transformer, the control module is helped to be used for big in the primary voltage of the transformer
When setting voltage, controls the switch module and disconnect.
In some embodiments, described for electric installation includes the switch for connecting the alternating current source and the rectification module
Part, the control module is for controlling the make-and-break time of the switch member to adjust the output work of the transformer unit interval
Rate；
Or the switch member is used to be controlled the make-and-break time of the switch member by the control panel of the household electrical appliance.
In some embodiments, the control panel connection is described for electric installation, and the control panel is based on work(for receiving
Input instruction is simultaneously sent to described for electric installation by the input instruction of rate setting, and the control module is for according to described defeated
Enter instruction and controls the output power for electric installation；
Or the control panel is used to receive the input instruction based on power setting and is instructed according to the input and controlled
The output power for electric installation.
The controllable impedance and household electrical appliance of the present invention acquires the temperature of inductor by the way that temperature-sensing element is arranged, in inductor
The coil turn that control unit can automatically adjust inductor when the temperature is excessively high can prevent current saturation to reduce magnetic flux density,
Play the role of protecting electronic component.
The additional aspect and advantage of embodiments of the present invention will be set forth in part in the description, partly will be from following
Description in become apparent, or the practice of embodiment through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, wherein：
Fig. 1 is the module diagram of the controllable impedance of embodiment of the present invention；
Fig. 2 is the circuit diagram of the controllable impedance of embodiment of the present invention；
Fig. 3 to Fig. 4 is the Curve of Magnetic Hysteresis Loop schematic diagram of the controllable impedance of embodiment of the present invention；
Fig. 5 is the circuit diagram of the household electrical appliance of embodiment of the present invention；With
Fig. 6 is the module diagram of the household electrical appliance of embodiment of the present invention.
Specific implementation mode
Embodiments of the present invention are described below in detail, the example of embodiment is shown in the accompanying drawings, wherein identical or class
As label indicate same or similar element or element with the same or similar functions from beginning to end.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of embodiments of the present invention, term " first ", " second " are used for description purposes only, and cannot understand
To indicate or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include one or more feature.In embodiments of the present invention
In description, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；Can be directly connected, can also indirectly connected through an intermediary, can be connection inside two elements or
The interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in embodiments of the present invention.
Following disclosure provides many different embodiments or example is used for realizing embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, hereinafter the component of specific examples and setting are described.When
So, they are merely examples, and is not intended to limit the present invention.In addition, embodiments of the present invention can be in different examples
Repeat reference numerals instruction discusses the relationship between various embodiments and/or setting in son.In addition, the embodiment party of the present invention
The various and/or reference letter that formula provides, this repetition are itself not specific technique for purposes of simplicity and clarity
With the example of material, but make those of ordinary skill in the art may realize that the application of other techniques and/or other materials
With.
It please refers to Fig.1 and Fig. 2, the controllable impedance 100 of embodiment of the present invention includes inductor 10, temperature-sensing element 12 and control
Unit 14 processed.Temperature-sensing element 12 is used to sense the temperature of inductor 10, and control unit 14 according to temperature-sensing element 12 for collecting
Inductor 10 temperature adjust inductor 10 inductance value.
Specifically, inductor 10 is used not only for filtering, oscillation, delay, trap in circuit, moreover it can be used to screening letter
Number, cross noise filtering, stabling current and inhibit Electromagnetic Interference the effects that.Fig. 3 is please referred to, however, on the one hand, household electrical appliance
In use since power attenuation makes component fever around, own temperature rises another aspect inductor at work,
The performance parameter of inductor will be made to change, the magnetic permeability of inductor is caused to decline, hysteresis loop changes, in temperature, electricity
In the case that sense material and coil turn are constant, the B-H loop after changing in selecting identical working region is than the magnetic before variation
Stagnant slope of a curve smaller, it is easier to reach current saturation, constant temperature is excessively high or even can burn household electrical appliance.
The controllable impedance 100 of embodiment of the present invention acquires the temperature of inductor 10 by the way that temperature-sensing element 12 is arranged,
Control unit 14 can automatically adjust the coil turn of inductor 10 to reduce magnetic flux density to inductor 10 when the temperature is excessively high, incorporated by reference to
Refering to Fig. 4, the cross-sectional area of inductor and it is constant by electric current in the case of, reduce the number of turns of inductor coil, magnetic flux is close
Spending B reduces, and working region is made to be moved toward the H axis left side, and B-H loop slope becomes larger in the working region after offset, can prevent electricity
Stream saturation plays the role of protecting electronic component.It should be noted that before temperature change referring to inductor in Fig. 3 and Fig. 4 rigid
B-H loop when start-up operation refers to when inductor reaches preset temperature or more after a period of operation after temperature change
B-H loop.
In some embodiments, inductor 10 includes the first connecting pin 102, second connection end 104 and adjustable side 106,
Adjustable side 106 is between the first connecting pin 102 and second connection end 104.Controllable impedance 100 further includes connection control unit 14
Regulating switch 16, regulating switch 16 is connected to the first connecting pin 102 and adjustable side 104, and control unit 14 is for controlling to adjust
Switch 16 is to disconnect the first connecting pin 102 and adjustable side 106 and the first connecting pin 102 of connection and adjustable side 106.
Specifically, the first connecting pin 102 and second connection end 104 can be the both ends of 10 coil of inductor, and adjusting is opened
It can be normally opened electromagnetic relay to close 16.What electromagnetic relay was generally made of iron core, coil, armature and contact reed etc..
After the coil both ends of electromagnetic relay add certain voltage, certain electric current can be flowed through in coil, to generate galvanomagnetic-effect,
Armature will overcome the pulling force of return spring to be drawn to iron core under the action of electromagnetic attracting force, to the movable contact with moving armature with
Stationary contact (normally opened contact) is attracted, and electromagnetic relay is closed.After coil blackout, the suction of electromagnetism also disappears therewith, and armature is just
Original position can be returned in the reaction force of spring, movable contact is made to be discharged with original stationary contact (normally-closed contact), electromagnetism after
Electric appliance disconnects.It is attracted and discharges in this way, to achieve the purpose that conducting, cut-out in circuit.And in embodiment party of the present invention
In formula, when normally opened electromagnetic relay is off, regulating switch 16 just will disconnect the first connecting pin 102 and adjustable side
106 circuit connects, and the electric current in circuit generates maximum magnetic flux by whole coils of inductor 10.When normally opened electromagnetism
In the closure state, regulating switch 16 will be connected the first connecting pin 102 and be connected with the circuit of adjustable side 106 relay, electricity
Electric current in road generates smaller magnetic flux by the coil sections of inductor 10.In this way, controlling inductance by regulating switch 16
The inductance value of device 10, it is simple in structure.
In some embodiments, control unit 14 includes divider resistance 18.Regulating switch 16 includes first end 161 and the
Two ends 162.One end of divider resistance 18 connects power supply VCC, and the other end connects one end of first end 161 and temperature-sensing element 12.Sense
The other end of warm element 12 connect and is grounded with second end 162.
Specifically, the circuit that divider resistance 18 is formed with regulating switch 16 and temperature-sensing element 12 is connected in series with, divider resistance
18, for protecting temperature-sensing element 12, can avoid temperature-sensing element 12 from being burnt because the voltage at both ends is excessive.Power supply VCC can be used directly
Galvanic electricity source.In one example, temperature-sensing element 12 is posive temperature coefficient thermistor.
In some embodiments, control unit 14 is used to be less than in the temperature of 12 collected inductor 10 of temperature-sensing element
Regulating switch 16 is controlled when preset temperature disconnects the first connecting pin 102 and adjustable side 106.
Specifically, household electrical appliance fever in rigid start to work is smaller, and the temperature change of inductor 10 is little, temperature-sensing element
12 temperature for collecting inductor 10 are less than preset temperature, and regulating switch 16 is made to disconnect the first connecting pin 102 and adjustable side 106,
It can ensure that inductor 10 fully works to generate maximum magnetic flux.The specific data of preset temperature can according to circumstances into
Row setting.
In some embodiments, control unit 14 is used for not small in the temperature of 12 collected inductor 10 of temperature-sensing element
Regulating switch 16 is controlled when preset temperature connects the first connecting pin 102 and adjustable side 106.
Specifically, after a period of operation, calorific value rises household electrical appliance, and the temperature raising of inductor 10 is more, this
When temperature-sensing element 12 collect the temperature of inductor 10 more than preset temperature, to reduce influence of the high temperature to inductor 10, make
Regulating switch 16 connects the first connecting pin 102 and adjustable side 106, reduces the working turns of 10 coil of inductor, and magnetic flux subtracts
Few, magnetic flux density reduces, and electric current can be prevented full, plays the role of protecting household electrical appliance.
Fig. 5 and Fig. 6 are please referred to, embodiment of the present invention additionally provides a kind of household electrical appliance 200, embodiment of the present invention
Controllable impedance 100 can be used for the household electrical appliance 200 of embodiment of the present invention.Household electrical appliance 200 include for electric installation 210 and connecting
Connect the load 220 for electric installation 210.Include filter module 60 for electric installation 210, filter module 60 includes any of the above-described embodiment party
The controllable impedance 100 of formula.
Specifically, household electrical appliance 200 inevitably generate fever, household electric because of power attenuation in use
The fever when starting to start work of device 200 is smaller, and the temperature change of inductor 10 is little, and temperature-sensing element 12 collects inductor 10
Temperature be less than preset temperature, make regulating switch 16 be off-state, can ensure inductor 10 fully work with generation
Maximum magnetic flux.After a period of operation, calorific value rises household electrical appliance 200, and the temperature raising of inductor 10 is more, this
When temperature-sensing element 12 collect the temperature of inductor 10 more than preset temperature, to reduce influence of the high temperature to inductor 10, make
Regulating switch 16 is conducting state, reduces the working turns of 10 coil of inductor, and magnetic flux is reduced, and magnetic flux density reduces, energy
Current saturation is enough prevented, plays the role of protecting household electrical appliance 200.
In some embodiments, further include rectification module 11, transformer 20, switch module 30 and control for electric installation 210
Molding block 40.Rectification module 11 is connected to alternating current source 50, and filter module 60 connects rectification module 11, the connection filtering mould of transformer 20
Block 60.For providing on-off signal to transformer 20, control module 40 is used for according to predetermined power output control switch module 30
Signal controls the switching frequency of switch module 30 to switch module 30.
The above embodiment in electric installation 210, since switch module 30 provides on-off signal to transformer 20, in this way
It can play the role of protecting circuit when alternating current source 50 is unstable, in addition, since control module 40 controls switch module 30
Switching frequency, so that can steadily provide output voltage for electric installation 210.It is appreciated that in some embodiments, leading to
Break signal is synchronous with the switching frequency of switch module 30, for example, when switch module 30 opens (conducting), switch module 30 carries
For connecting signal to transformer 20, transformer 20 is made to work；When switch module 30 closes (disconnection), switch module 30 provides interruption
Signal makes transformer 20 be stopped to transformer 20.
Specifically, rectification module 11 includes the full-wave rectifying circuit of four diodes composition.Rectification module 11 can will be handed over
The alternating voltage that stream source 50 generates is converted to DC voltage.It should be noted that in one example, alternating current source 50 is alternating current,
Its alternating voltage provided is about 220V, and frequency is about 50HZ.It is appreciated that other forms also can be used in rectification module 11
Circuit and be not limited to forming by four diodes.
Further, filter module 60 connects rectification module 11 and transformer 20.Filter module 60 further includes filter capacitor
62, one end ground terminal of filter capacitor 62.The anti-interference energy for electric installation 210 can be improved by filter capacitor 62 and inductor 10
Power, and the interference for electric installation 210 to other equipment can also be reduced.
It should be noted that in the present embodiment, transformer 20 can be high frequency transformer 20.High frequency transformer 20 is work
Working frequency is more than the power transformer 20 of intermediate frequency (10kHz).High frequency transformer 20 includes primary coil and secondary coil.High frequency becomes
What depressor 20 transmitted is high-frequency pulse square wave signal.The control signal that control module 40 generates can be high-frequency signal, be greater than
The signal of 10kHz.
Switch module 30 includes switching tube 32 and resonant capacitance 34.The base stage link control module 40 of switching tube 32, switch
One end of the emitter connection rectification module 11 of pipe 32, one end of the primary coil of the collector connection transformer 20 of switching tube 32
With one end of resonant capacitance 34, the other end and inductor of the primary coil of the other end connection transformer 20 of resonant capacitance 34
10.Rectification module 11 export DC voltage after the effect of switching tube 32, resonant capacitance 34 and transformer 20 inversion be
The high-frequency ac voltage of 20KHZ to 50KHZ.When switching tube 32 is connected, electric energy can be made to be stored in transformation by resonant capacitance 34
To maintain the voltage of transformer 20 in the primary coil of device 20, when switching tube 32 disconnects, transformer 20 is mutual with resonant capacitance 34
Resonance is so that the voltage of the emitter of switching tube 32 when being connected next time of switching tube 32 is reduced since 0V so as to play
The effect of 32 switching loss of switching tube.
It should be pointed out that switching tube 32 can be IGBT (Insulated Gate Bipolar Transistor, insulation
Grid bipolar transistor), control module 40 can drive IGBT to be switched on or off.
Predetermined power for electric installation 210 can be pre-set power, when the voltage of alternating current source 50 fluctuates, control
Molding block 40 can generate control signal to switch module 30 to control the turn-on time of switching tube 32.The turn-on time of switching tube 32
Longer, the switching frequency of switching tube 32 is lower, so that the output current of the collector of switching tube 32 is also just smaller.Also
To say, in the case where control module 40 is worked with predetermined power, when the voltage of alternating current source 50 fluctuation occurs and when increasing, can be with
The switching frequency of switch module 30 is controlled to control the defeated of the collector of switching tube 32 according to predetermined power by control module 40
Go out electric current, so that maintaining constant output power within the unit interval for electric installation 210 to reach for the pre- of electric installation 210
If power.
Can be electronic transformer for electric installation 210, electronic transformer has can be according to detection in embodiment of the present invention
To environmental variance (voltage fluctuation of such as alternating current source) and predetermined power come stablize itself output power without outside control
The function of the control signal of device.
In some embodiments, control module 40 includes detection module 42 and controller 44, and detection module 42 is used for base
It is detected in alternating current source 50 to obtain detection signal, and detection signal is sent to controller 44, controller 44 is for being based on
Detect the switching frequency of Signal-controlled switch module 30.
In this way, the voltage that alternating current source 50 is detected by detection module 42 controls the switching frequency of switch module 30 in time, this
Sample to keep stable output power within the unit interval for electric installation 210.
Specifically, controller 44 can be MCU (Microcontroller Unit, micro-control unit).Controller 44 can be with
The detection signal acquired to detection module 42 is handled and is analyzed, when detection module 42 detects the voltage hair of alternating current source 50
When raw fluctuation, controller 44 can make corresponding processing to control the switching frequency of switch module 30.
In some embodiments, control module 40 includes driving circuit 46,46 connecting valve module of driving circuit, 30 He
Controller 44, the switching frequency for the control Signal-controlled switch module 30 that driving circuit 46 is used to be exported according to controller 44.
In this way, the control signal that controller 44 exports can control the switch frequency of switch module 30 by driving circuit 46
Rate, so that circuit structure is simple.
Specifically, the detection signal that controller 44 can be detected according to detection module 42 generates corresponding pulse-width signal
(PWM, Pulse Width Modulation), and driving circuit 46 can receive the pulsewidth modulation letter sent out from controller 44
Number the turn-on time of switching tube 32 is controlled, to change the switching frequency of switching tube 32.It should be noted that in an example
In, pulse-width signal is the pulse that each pulse width is equal, and the period by changing spike train can adjust output frequency
Rate, the width or duty ratio for changing pulse can adjust output voltage, that is to say, that can make voltage using suitable control method
Change with frequency coordination, electricity of the control for electric installation 210 is reached so as to the duty ratio in period, PWM by adjusting PWM
The purpose of stream.
Further, include the first sampling module 70 for electric installation 210, the first sampling module 70 connects the defeated of alternating current source 50
Outlet and detection module 42, detection module 42 are used to pass through 70 acquisition testing signal of the first sampling module.
In this way, the working condition of alternating current source 50 can be accurately obtained by the first sampling module 70, so that detection
Module 42 more accurately obtains the working condition for electric installation 210.
Specifically, the first sampling module 70 includes first resistor 72 and second resistance 74.One end of first resistor 72 connects
Alternating current source 50 and rectification module 11, the other end connect second resistance 74 and detection module 42.One end of second resistance 74 connects
Alternating current source 50 and rectification module 11, the other end connect first resistor 72 and detection module 42.In this way, detection module 42 passes through
One resistance 72 and second resistance 74 can detect the voltage of alternating current source 50.
Further, include the second sampling module 80 for electric installation 210, the second sampling module 80 connects rectification module 11
Output end and detection module 42, detection module 42 are used to detect the electric current of transformer 20, controller by the second sampling module 80
44 switching frequency for controlling switch module 30 according to the electric current of transformer 20, the voltage of alternating current source 50 and predetermined power.
In this way, can quickly and accurately detect the electric current of transformer 20, the knot of circuit by the second sampling module 80
Structure is simple.
Specifically, the second sampling module 80 includes 3rd resistor 82, one end connection rectification module 11 of 3rd resistor 82
Output end and ground terminal, the emitter and detection module 42 of other end connecting valve pipe 32.Detection module 42 is flowed through by detection
The electric current of 3rd resistor 82, so as to detect the primary current of transformer 20.Controller 44 can be according to 42 institute of detection module
State the predetermined power adjustment switching tube 32 of the primary current of the transformer 20 detected, the voltage of alternating current source 50 and control module 40
Turn-on time so that when the voltage of alternating current source 50 fluctuates adjust transformer 20 primary current so that
Control maintains predetermined power constant, and then but also output power of the transformer 20 within the unit interval maintains to stablize.
In some embodiments, the auxiliary transformer 130 of link control module 40 is included for electric installation 210, auxiliary becomes
Depressor 130 is used to detect the primary voltage of transformer 20, and control module 40 is used to be more than setting in the primary voltage of transformer 20
When voltage, control switch module 30 disconnects.
In this way, the primary voltage of transformer 20 can be quickly detected by auxiliary transformer 130, and rapid feedback is to control
Molding block 40, circuit structure is simple.
Specifically, in embodiment of the present invention, control module 40 includes detection module 42 and controller 44, auxiliary transformer
The 130 voltage relationship proportional to the primary voltage of transformer 20, such as proportional relationship.Also it just says, detection module 42 is examined
The voltage of auxiliary transformer 130 is surveyed, and the voltage of auxiliary transformer 130 is transferred to controller 44, controller 44 is used for basis
The proportionate relationship of the voltage of auxiliary transformer 130 and the primary voltage of transformer 20 would know that the primary voltage of transformer 20.Together
When, it is more than setting voltage in the primary voltage of transformer 20, controller 44 can make corresponding processing and can control after analyzing and open
The switching tube 32 for closing module 30 disconnects, so as to play the role of protecting transformer 20 and switching tube 32.
Further, auxiliary transformer 130 be connected to transformer 20 primary side may make transformer 20 output stablize, and
And it is connected to winding coil and insulating materials needed for the primary side of transformer 20 relative to auxiliary transformer 130, it is connected to change
The auxiliary transformer 130 of 20 primary side of depressor can reduce the cost of transformer 20, reduce the size of transformer 20.
Further, include third sampling module 90 for electric installation 210, third sampling module 90 connects auxiliary transformer
130 and control module 40, control module 40 passes through the primary voltage that third sampling module 90 detects transformer 20.
In this way, can quickly and accurately detect the primary voltage of transformer 20, circuit knot by third sampling module 90
Structure is simple.
Specifically, in embodiment of the present invention, control module 40 includes detection module 42 and controller 44, and third samples mould
Block 90 includes the 4th resistance 92 and the 5th resistance 94, and one end of the 4th resistance 92 connects one end and the control of auxiliary transformer 130
Device 44, other end connecting detection module 42.One end of one end connection auxiliary transformer 130 of 5th resistance 94 and controller
44, other end connecting detection module 42.Detection module 42 can be quickly detected by the 4th resistance 92 and the 5th resistance 94
The voltage of auxiliary transformer 130.
Further, control module 40 includes accessory power supply 48, and accessory power supply 48 connects auxiliary transformer 130.In this way, auxiliary
Help power supply 48 that can provide power supply to control module 40 by auxiliary transformer 130.
Specifically, controller 44 by accessory power supply 48 be separately connected the 4th resistance 92 one end and the 5th resistance 94 one
End.Meanwhile accessory power supply 48 connects controller 44, the sustainable other moulds for giving controller 44 or control module 40 of accessory power supply 48
Block or circuit or element provide power supply.
Further, accessory power supply 48 may include that voltage-stablizer, rectifier diode and capacitance etc., rectifier diode become auxiliary
The output voltage of depressor 130 switchs to DC voltage to capacitor charging, the voltage of capacitance by voltage-stablizer stablize certain numerically, such as
18V and/or 5V, stabilizer output voltage can be provided to controller 44 and driving circuit 46, such as 5V supply controllers 44,18V
It is provided to driving circuit 46.
In some embodiments, include the switch member 110 of connection alternating current source 50 and rectification module 11 for electric installation 210,
Control module 40 is for controlling the make-and-break time of switch member 110 to adjust the output power of the unit interval of transformer 20.
In this way, by the make-and-break time of control switch member 110 to adjust the output power of the unit interval of transformer 20, this
Sample is efficient, and transformer 20 is made to maintain to stablize in the output power of unit interval, and circuit structure is simple.
Specifically, in one example, switch member 110 is relay, preferably electromagnetic relay.In embodiment party of the present invention
In formula, the make-and-break time by controlling electromagnetic relay 110 can control the output power of 20 unit interval of transformer.Namely
It says, can be according to the input power of user, within the unit interval, controlling the make-and-break time ratio of electromagnetic relay 110 can make
Transformer 20 exports the setting power set by user.
It should be noted that user input power or setting power can it is identical as the predetermined power for electric installation 210 or
Difference, user herein refer to ordinary consumer rather than the maintenance personal of profession.The input power of user or setting power are
Referring to user can be inputted or the power of setting by button on household electrical appliance 200 or input interface, and for the default of electric installation 210
Power is the power not changed by the input of user or setting, for electric installation 210 predetermined power can be household electrical appliance 200 or
Set constant power when dispatching from the factory for electric installation 210.It is appreciated that when household electrical appliance 20 or when being repaired for electric installation 210,
Maintenance personal can change the predetermined power for electric installation 210 by maintenance device, but in user's normal use household electrical appliance
When 200, it can not usually change the predetermined power for electric installation 210.
In one embodiment, the predetermined power for electric installation 210 is 1000W, and the input power of user is 800W.
In embodiment of the present invention, it will not change with the input power of user for the predetermined power of electric installation 210, that is,
It says, still switch member 110 can be controlled according to 1000W for electric installation 210.But in order to reach user setting
800W can only control the output power for electric installation 210 by controlling the make-and-break time of switch member 110 for electric installation 210, open
It is 1000W to close output power when part 110 is connected for electric installation 210, for the output work of electric installation 210 when switch member 110 disconnects
Rate is 0W, for example, within the unit interval (such as 10S), control switch member 110 connects 8S, disconnects 2S, then within the unit interval
(10S), the average value for the output power of electric installation 210 are 800W, that is to say, that for the output of electric installation 210 in the unit interval
Power can be equal to the input power or setting power of user.
In some embodiments, switch member 110 is used to control switch member 110 by the control panel 230 of household electrical appliance 200
Make-and-break time.
Specifically, in one example, the predetermined power for electric installation 210 is 1000W, and the input power of user is
800W.It will not change with the input power of user for the predetermined power of electric installation 210.In order to reach user setting
800W, control panel 230 control the make-and-break time of switch member 110 to control the output power for electric installation 210.For example, in unit
In time (such as 10S), control panel 230 controls switch member 110 and connects 8S, disconnects 2S, then within the unit interval (10S), for Denso
The average value for setting 210 output power is 800W, that is to say, that can be equal to for the output power of electric installation 210 in the unit interval
The input power or setting power at family.
It should be noted that the output power for electric installation 210 can be understood as the input power inputted with user's operation
Unanimously, and for the predetermined power of electric installation 210 40 pre-set power of module in order to control.
Further, include voltage doubling rectifier module 120 for electric installation 210, voltage doubling rectifier module 120 is connected to transformer 20
Primary side, voltage doubling rectifier module 120 is used to increase the output voltage of transformer 20.
In this way, the output voltage of transformer 20 can be made to double by voltage doubling rectifier module 120, circuit structure is simple.
Specifically, voltage doubling rectifier module 120 includes the first multiplication of voltage diode 122,124, first times of the second multiplication of voltage diode
Voltage capacitance 126 and second times of voltage capacitance 128.First multiplication of voltage diode 122 and the second multiplication of voltage diode 124 are connected in series with.First
Times voltage capacitance 126 and second times of voltage capacitance 128 are connected in series with.First multiplication of voltage diode 122 and the second multiplication of voltage diode 124 composition
Circuit and first times of voltage capacitance 126 and the circuit in parallel that forms of second times of voltage capacitance 128 connect.One secondary of transformer 20
One end of coil is connected between the first multiplication of voltage diode 122 and the second multiplication of voltage diode 124, and the other end is connected to the first multiplication of voltage
Between capacitance 126 and second times of voltage capacitance 128.In addition, another secondary coil of transformer 20 can connect power load 220,
Such as magnetron.
In some embodiments, the connection of control panel 230 is set for receiving based on power for electric installation 210, control panel 230
Fixed input is instructed and is sent control signals to for electric installation 210, and control module 40 is used to instruct control power supply according to input
The output power of device 210.
In this way, household electrical appliance 200 can be instructed according to the input of user to control the output power for electric installation 210, operate
Flexibly, user experience is good.
Specifically, control panel 230 can be the electric-controlled plate of household electrical appliance 200 or computer board and can be used as electric installation 210
Host computer is provided with button or other input units on control panel 230, and user can input the household electric of setting with operation button
The output power of device 200.Certainly, control panel 230 is not limited to the above embodiment, and can select other according to actual demand
Embodiment.For example, control panel 230 can be by wired or wirelessly the input power of user is sent to for Denso
Set 210.
Specifically, in one embodiment, the predetermined power for electric installation 210 is 1000W, and user passes through control panel
The output power 800W of the household electrical appliance 200 of 230 input settings.Within the unit interval (such as 10S), the controller of control module 40
44 control switch members 110 connect 8S, disconnect 2S, then within the unit interval (10S), are averaged for the output power of electric installation 210
Value is 800W, that is to say, that the output power in the unit interval for electric installation 210 can be operated equal to user on household electrical appliance 200
Input power.
Further, when including switch member 110 for electric installation 210, switch member 110 may be provided on control panel 230, control
The input of user can be instructed and be sent to control module 40 in a wired or wireless manner by making sheet 230, control module 40 according to
The input instruction at family can send a control signal to control panel 230 or computer board by wired or wireless mode, then by control panel
230 or computer board control switch member 110 make-to-break ratio.
Further, control panel 230 is used to receive the input instruction based on power setting and instructs control to supply according to input
The output power of electric installation 210.
In this way, control panel 230 can be directly according to the make-to-break ratio of the input instruction control switch member 110 of user, to rise
Output power to control for electric installation 210 acts on.
In one example, it is 1000W, the input that user is inputted by control panel 230 for the predetermined power of electric installation 210
Power is 800W.Within the unit interval (such as 10S), control panel 230 controls switch member 110 and connects 8S, disconnects 2S, then in unit
Interior (10S), the average value for the output power of electric installation 210 are 800W, that is to say, that for electric installation 210 in the unit interval
Output power can be equal to the input power that user operates on household electrical appliance 200.It should be noted that for electric installation 210
The input power that output power can be understood as with user is inputted by control panel 230 is consistent, and for the default work(of electric installation 210
Rate 40 pre-set power of module in order to control.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the present invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
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 discuss suitable
Sequence, include according to involved function by it is basic simultaneously in the way of or in the opposite order, to execute 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 (system of such as computer based system including processing module or other can be from instruction
Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any can include, store, communicating, propagating or
Transmission 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 includes following：With one or more wiring
Electrical connection section (control method), 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 be for example by carrying out optical scanner to paper or other media, then into edlin, interpretation or when necessary with it
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or combination thereof come real
It is existing.In the above-described embodiment, multiple steps or method can use storage in memory and by suitable instruction execution system
The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used
Any one of following technology or their combination well known to domain are realized：With for realizing logic function to data-signal
The discrete logic of logic gates, the application-specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that realize all or part of step that above-described embodiment method carries
Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium
In matter, which includes the steps that one or a combination set of embodiment of the method when being executed.
In addition, each functional unit in various embodiments of the present invention can be integrated in a processing module, also may be used
To be that each unit physically exists alone, can also two or more units be integrated in a module.It is above-mentioned integrated
The form that hardware had both may be used in module is realized, can also be realized in the form of software function module.The integrated module
If being realized in the form of software function module and when sold or used as an independent product, a calculating can also be stored in
In machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiment is
Illustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be right
Above-mentioned implementation implementation is changed, changes, replacing and modification.
Claims (12)
1. a kind of controllable impedance, which is characterized in that including inductor, temperature-sensing element and control unit, the temperature-sensing element is used for
The temperature of the inductor is sensed, described control unit is used for the temperature according to the collected inductor of the temperature-sensing element
Adjust the inductance value of the inductor.
2. controllable impedance as described in claim 1, which is characterized in that the inductor includes the first connecting pin, the second connection
End and adjustable side, the adjustable side is between first connecting pin and the second connection end；
The controllable impedance includes the regulating switch for connecting described control unit, and the regulating switch connects first connecting pin
With the adjustable side, described control unit is for controlling the regulating switch to disconnect first connecting pin and the adjustable side
With connection first connecting pin and the adjustable side.
3. controllable impedance as claimed in claim 2, which is characterized in that described control unit includes divider resistance, the adjusting
Switch includes first end and second end, and one end of the divider resistance connects power supply, and the other end of the divider resistance connects institute
One end of first end and the temperature-sensing element is stated, one end of the temperature-sensing element connects ground terminal with the second end.
4. controllable impedance as claimed in claim 2, which is characterized in that described control unit is used to acquire in the temperature-sensing element
To the temperature of the inductor be less than preset temperature when control the regulating switch and disconnect first connecting pin and the tune
Save end.
5. controllable impedance as claimed in claim 4, which is characterized in that described control unit is used to acquire in the temperature-sensing element
To the temperature of the inductor be not less than the preset temperature when control the regulating switch connect first connecting pin and
The adjustable side.
6. a kind of household electrical appliance include for electric installation and connecting the load for electric installation, which is characterized in that described for Denso
It sets including filter module, the filter module includes claim 1-5 any one of them controllable impedances.
7. household electrical appliance as claimed in claim 6, which is characterized in that it is described for electric installation include rectification module, transformer, open
Module and control module are closed, for the rectification module for connecting alternating current source, the filter module connects the rectification module, described
Transformer connects the filter module, and the switch module is for providing on-off signal to the transformer, the control module
For generating the switching frequency that control signal controls the switch module to the switch module according to predetermined power.
8. household electrical appliance as claimed in claim 7, which is characterized in that the control module includes detection module and controller,
The detection module is used to be based on to detect to obtain detection signal the alternating current source, and the detection signal is sent to institute
Controller is stated, the controller is used to control the switching frequency of the switch module based on the detection signal.
9. household electrical appliance as claimed in claim 8, which is characterized in that the control module includes driving circuit, the driving
Circuit connects the switch module and the controller, the control signal that the driving circuit is used to export according to the controller
Control the switching frequency of the switch module.
10. household electrical appliance as claimed in claim 7, which is characterized in that described to include the connection control module for electric installation
Auxiliary transformer, the auxiliary transformer is used to detect the primary voltage of the transformer, and the control module is used in institute
When stating the primary voltage of transformer more than setting voltage, controls the switch module and disconnect.
11. household electrical appliance as claimed in claim 7, which is characterized in that it is described for electric installation include connect the alternating current source and
The switch member of the rectification module, the control module is for controlling the make-and-break time of the switch member to adjust the transformer
The output power of unit interval；
Or the switch member is used to be controlled the make-and-break time of the switch member by the control panel of the household electrical appliance.
12. household electrical appliance as claimed in claim 11, which is characterized in that the control panel connection is described for electric installation, described
Control panel is used to receive the input instruction based on power setting and is sent to input instruction described for electric installation, the control
Molding block, which is used to be instructed according to the input, controls the output power for electric installation；
Or the control panel is used to receive the input instruction based on power setting and according to described in input instruction control
For the output power of electric installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387230.6A CN108376972A (en) | 2018-04-26 | 2018-04-26 | Controllable impedance and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387230.6A CN108376972A (en) | 2018-04-26 | 2018-04-26 | Controllable impedance and household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108376972A true CN108376972A (en) | 2018-08-07 |
Family
ID=63032706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810387230.6A Pending CN108376972A (en) | 2018-04-26 | 2018-04-26 | Controllable impedance and household electrical appliance |
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| CN105679494A (en) * | 2016-03-15 | 2016-06-15 | 东莞铭普光磁股份有限公司 | Adjustable inductor |
| WO2016135889A1 (en) * | 2015-02-25 | 2016-09-01 | 三菱電機株式会社 | Motor drive control device and air conditioner |
| CN208094171U (en) * | 2018-04-26 | 2018-11-13 | 广东美的厨房电器制造有限公司 | Controllable impedance and household electrical appliance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB805930A (en) * | 1955-11-15 | 1958-12-17 | Western Electric Co | Adjustable inductance device |
| JPH10311646A (en) * | 1997-05-13 | 1998-11-24 | Matsushita Refrig Co Ltd | Control device of refrigerator |
| CN1255602A (en) * | 1998-11-27 | 2000-06-07 | 东芝株式会社 | Microwave oven |
| CN101662218A (en) * | 2009-09-04 | 2010-03-03 | 福建星网锐捷网络有限公司 | Switch power supply, system and protection method |
| WO2016135889A1 (en) * | 2015-02-25 | 2016-09-01 | 三菱電機株式会社 | Motor drive control device and air conditioner |
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