CN108626157A - Fan drive circuit and electromagnetic heating apparatus - Google Patents
Fan drive circuit and electromagnetic heating apparatus Download PDFInfo
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- CN108626157A CN108626157A CN201710159824.7A CN201710159824A CN108626157A CN 108626157 A CN108626157 A CN 108626157A CN 201710159824 A CN201710159824 A CN 201710159824A CN 108626157 A CN108626157 A CN 108626157A
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- drive circuit
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 239000003990 capacitor Substances 0.000 claims description 58
- 238000004146 energy storage Methods 0.000 claims description 32
- 230000005611 electricity Effects 0.000 claims description 10
- 230000001174 ascending effect Effects 0.000 abstract description 9
- 230000001681 protective effect Effects 0.000 abstract description 4
- 230000007257 malfunction Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
It includes wind turbine that the present invention, which discloses a kind of fan drive circuit and electromagnetic heating apparatus, the electromagnetic heating apparatus,；Fan drive circuit includes that fan provides the driving power and controller of working power, wind turbine soft-start circuit and driving switch, driving switch are series between wind turbine and ground, wherein controller is for exporting air-blower control signal；Wind turbine soft-start circuit controls the ascending output of air-blower control signal for receiving air-blower control signal；The air-blower control signal that driving switch is used to be exported according to wind turbine soft-start circuit, adjusts the switch conduction degree of its own, to adjust the size of wind turbine driving voltage.It is excessive that electromagnetic heating apparatus of the present invention solves the dash current that the electric capacity of voltage regulation inside due to wind turbine is generated in wind turbine powered on moment, and causes driving switch to fail so that the problem of wind turbine cisco unity malfunction, improves the protective capacities of electromagnetic heating apparatus.
Description
Technical field
The present invention relates to electromagnetic heating technique field, more particularly to a kind of fan drive circuit and electromagnetic heating apparatus.
Background technology
Currently, the electrical equipments such as electromagnetic oven mostly use greatly wind turbine to radiate to electrical equipment, so wind turbine is heating
The core element of cooling system in equipment.
Existing blower interior is usually present electric capacity of voltage regulation, and electric capacity of voltage regulation will produce prodigious punching in wind turbine powered on moment
Electric current is hit, and the capacity of capacitance is bigger, generated dash current is also bigger.If the dash current is excessive and is driven more than wind turbine
The threshold current of switch can then burn driving electric switch, and then lead to wind turbine cisco unity malfunction, thus occur in electrical equipment
Other components temperature rise it is serious, or even the problem of be burned out.
Invention content
The main object of the present invention is a kind of fan drive circuit of proposition and electromagnetic heating apparatus, it is intended to solve wind turbine upper
The dash current that electric moment generates is excessive and the problem of cause its driving switch to fail.
To achieve the above object, the present invention proposes a kind of fan drive circuit, is applied to electromagnetic heating apparatus, the electromagnetism
Heating equipment includes wind turbine；The fan drive circuit includes controller, wind turbine soft-start circuit and driving switch, the driving
Switch is series between the wind turbine and ground, wherein
The controller, for exporting air-blower control signal；
The wind turbine soft-start circuit, for receiving the air-blower control signal, and control the air-blower control signal by
It is small to be exported to big；
The driving switch, the air-blower control signal for being exported according to the wind turbine soft-start circuit, adjusts its own
Switch conduction degree, to adjust the size of the wind turbine driving voltage.
Preferably, the driving switch is NPN type triode.
Preferably, the wind turbine soft-start circuit includes capacitor energy storage circuit and bleeder circuit, the capacitor energy storage circuit
Input terminal connect with the controller, the output end of the capacitor energy storage circuit is connect with the output end of the bleeder circuit；
The output end of the bleeder circuit is connect with the driving switch.
Preferably, the capacitor energy storage circuit includes first resistor and capacitor, and the first end of the first resistor is institute
State the input terminal of capacitor energy storage circuit, the second end of the first resistor is the output end of the capacitor energy storage circuit, and with institute
State the first end connection of capacitor；The second end of the capacitor is grounded.
Preferably, the bleeder circuit includes second resistance and 3rd resistor, the second resistance first end and the electricity
Hold the output end connection of accumulator, the second end of the second resistance is the output end of the bleeder circuit, and with described the
The first end of three resistance connects；The second end of 3rd resistor is grounded.
Preferably, the fan drive circuit further includes the first one-way conduction element, the first one-way conduction element string
Connection is connected between the controller and the capacitor energy storage circuit；The input terminal of the first one-way conduction element and the control
The output end of device processed connects, and the output end of the first one-way conduction element is connect with the input terminal of the capacitor energy storage circuit.
Preferably, the first one-way conduction element is the first diode, and the anode of first diode is described the
The input terminal of one one-way conduction element, the cathode of first diode are the output end of the first one-way conduction element.
Preferably, the fan drive circuit further includes the second one-way conduction element, the second one-way conduction element
Input terminal is connect with the controller, and the output end of the second one-way conduction element and the input terminal of bleeder circuit connect.
Preferably, the second one-way conduction element is the second diode, and the anode of second diode is described the
The output end of two one-way conduction elements, the cathode of second diode are the input terminal of the second one-way conduction element.
Preferably, the fan drive circuit further includes the 4th resistance, and the wind turbine includes positive power end and reversed electricity
Source, the driving switch include the first actuating station and the second actuating station, first end and the driving electricity of the 4th resistance
The positive power end of source and the wind turbine interconnects, the second end of the 4th resistance and the reverse electrical source end of the wind turbine and described
First actuating station of driving switch interconnects, the second actuating station ground connection of the driving switch.
The present invention also proposes that a kind of electromagnetic heating apparatus, the electromagnetic heating apparatus include wind turbine and wind turbine as described above
Driving circuit；The fan drive circuit includes controller, wind turbine soft-start circuit and driving switch, the driving switch series connection
Between the wind turbine and ground, wherein the controller, for exporting air-blower control signal；The wind turbine soft-start circuit is used
In the reception air-blower control signal, and control the ascending output of air-blower control signal；The driving switch is used for root
According to the air-blower control signal that the wind turbine soft-start circuit exports, the switch conduction degree of its own is adjusted, to adjust the wind
The size of machine driving voltage.
The fan drive circuit of electromagnetic heating apparatus of the present invention is receiving controller by the way that wind turbine soft-start circuit is arranged
It works when the air-blower control signal of output, and controls the ascending output of air-blower control signal to driving switch, so that driving is opened
It closes according to the air-blower control signal magnitude received, the switch conduction degree of its own is adjusted, to control driving power by small
To big output to wind turbine, and then drive wind turbine delay startup.Electromagnetic heating apparatus of the present invention solves steady inside due to wind turbine
Voltage capacitance is excessive in the dash current that wind turbine powered on moment generates, and leads to driving switch failure and make wind turbine from normal work
The problem of making improves the protective capacities of electromagnetic heating apparatus.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the high-level schematic functional block diagram of electromagnetic heating apparatus of the present invention；
Fig. 2 is the electrical block diagram of one embodiment of fan drive circuit in Fig. 1 electromagnetic heating apparatus.
Drawing reference numeral explanation：
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
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 describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the embodiment of the present invention directionality instruction (such as up, down, left, right, before and after ...),
Then directionality instruction be only used for explaining relative position relation under a certain particular pose (as shown in the picture) between each component,
Motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If in addition, relating to the description of " first ", " second " etc. in the embodiment of the present invention, it is somebody's turn to do " first ", " second " etc.
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.In addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, when the knot that conflicting or cannot achieve when will be understood that this technical solution occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection domain within.
The present invention proposes a kind of fan drive circuit, is applied in the electromagnetic heating apparatus such as electromagnetic oven, electromagnetic heating pot, should
Electromagnetic heating apparatus includes wind turbine, for radiating to other components in electromagnetic heating apparatus.
Referring to FIG. 1 and FIG. 2, in an embodiment of the present invention, which includes that fan 100 provides work
Make driving power 200 and controller 20, the wind turbine soft-start circuit 30 and driving switch 40 of power supply, the driving switch 40 is gone here and there
It is coupled between the wind turbine 100 and ground；The output end of controller 20 is connect with the input terminal of the wind turbine soft-start circuit 30, institute
The output end for stating wind turbine soft-start circuit 30 is connect with the controlled end of the driving switch Q1.
In the present embodiment, driving power 10 is used for when wind turbine 100 works, and driving power is provided for wind turbine 100.In order to keep away
The moment that Fan-free 100 starts, driving power 10 is loaded directly into generates larger dash current at wind turbine both ends, the present embodiment
The ascending output of driving power 10 is controlled to wind turbine 100 by the way that fan drive circuit 200 is arranged, and then drives wind turbine
100 delay startups.
In order to make electromagnetic heating apparatus preferably develop and reduce electrical equipment towards micromation, intelligentized direction
Power consumption, the present embodiment controller 20 preferably realized using integrated chip, controller 20 when electromagnetic heating apparatus works on power,
Corresponding air-blower control signal is exported to wind turbine soft-start circuit 30.
Wind turbine soft-start circuit 30 is acted when receiving the air-blower control signal of the output of controller 20, and controls driving electricity
The ascending output of voltage in source 10 is to wind turbine 100, to drive 100 delay startup of wind turbine.
Driving switch 40 is used to, according to the air-blower control signal received after the partial pressure of the bleeder circuit 32, adjust it certainly
The switch conduction degree of body, to adjust the size of 100 driving voltage of the wind turbine.
Specifically, driving switch 40 adjusts the conducting degree of its own according to the size of air-blower control signal, drives at this time
Dynamic switch 40 is equivalent to an adjustable resistance, and adjustable resistance is connected partial pressure with wind turbine 100, by adjusting the conducting journey of driving switch 40
Degree adjusts the size of the driving voltage of wind turbine 100 with this to adjust the resistance value of adjustable resistance, in the present embodiment, driving
Switch 40 gradually increases its conducting degree according to the ascending output of air-blower control signal, and the resistance value of adjustable resistance by
Decrescence small, when driving switch 40 is fully on, the resistance value of adjustable resistance is reduced to zero, and the voltage of driving power 10 adds completely at this time
Ensure that wind turbine 100 works normally at positive power end and the reverse electrical source end both ends of wind turbine 100.In this way, avoiding in wind turbine
100 powered on moment, the voltage of driving power 10 are applied directly to positive power end and the reverse electrical source end both ends of wind turbine 100, cause
Electric capacity of voltage regulation in wind turbine 100 is (not shown) to be generated larger dash current and burns driving switch 40.
The fan drive circuit 200 of electromagnetic heating apparatus of the present invention is being received by the way that wind turbine soft-start circuit 30 is arranged
It works when the air-blower control signal that controller 20 exports, and controls the ascending output of air-blower control signal to driving switch 40,
So that driving switch 40 according to the air-blower control signal magnitude received, adjusts the switch conduction degree of its own, to control
The ascending output of driving power 10 drives 100 delay startup of wind turbine to wind turbine 100.Electromagnetic heating apparatus solution of the present invention
The dash current generated in 100 powered on moment of wind turbine due to the electric capacity of voltage regulation of 100 the inside of wind turbine of having determined is excessive, and driving is caused to be opened
The problem of closing 40 failures and making 100 cisco unity malfunction of wind turbine, improves the protective capacities of electromagnetic heating apparatus.
With reference to Fig. 2, in a preferred embodiment, the driving switch 40 preferably uses NPN type triode Q1, driving switch
40 include the first actuating station and the second actuating station, and the base stage of the NPN type triode Q1 is the controlled end of the driving switch 40,
The first end of the current collection of the NPN type triode Q1 extremely driving switch 40, the transmitting of the NPN type triode Q1 is extremely
The second end of the driving switch 40.
It should be noted that there are three types of working conditions for NPN type triode Q1 tools, that is, end, amplify and be saturated three kinds of states,
In general, when NPN type triode Q1 is as driving switch 40, one sufficiently large voltage of base stage of NPN triode is given mostly, and
It allows it directly to be redirected by cut-off state and is redirected as opening state for saturation state, that is, the off state of corresponding driving switch 40
State, in this way there will be a drawback, if NPN triode Q1 is directly redirected from cut-off state as saturation state, NPN triode Q1
The voltage very little at collector and emitter both ends and be equivalent to short circuit, the driving voltage that driving power 10 exports at this time will directly add
It is loaded on the component that it is driven, and it is caused to generate dash current.In order to avoid there is the above problem, the present embodiment
In, air-blower control signal is exported from small to large to the base stage of NPN type triode Q1 so that NPN type triode Q1 is according to wind turbine
The output from small to large of control signal and magnifying state is entered to by cut-off state, then saturation state is entered by magnifying state, it is complete
Linear output, in this way, NPN type triode Q1 in magnifying state, is equivalent to an adjustable resistance and connects with wind turbine 100 point
Pressure, adjustable resistance with the wind the increase of machine control signal and its resistance value is gradually reduced, both end voltage is gradually reduced, and wind turbine
100 driving voltage gradually increases from zero, is loaded directly on wind turbine 100 so as to avoid in powered on moment supply voltage, and
So that the electric capacity of voltage regulation in wind turbine 100 is generated larger dash current and burns NPN type triode Q1.Certainly in other embodiments,
Driving switch 40 can also use the electronic switches such as metal-oxide-semiconductor to realize, not be limited herein.
In a preferred embodiment, the wind turbine soft-start circuit 30 includes capacitor energy storage circuit 31 and bleeder circuit 32,
The input terminal of the capacitor energy storage circuit 31 is connect with the controller 20, the output end of the capacitor energy storage circuit 31 with it is described
The output end of bleeder circuit 32 connects；The output end of the bleeder circuit 32 is connect with the driving switch 40.
In the present embodiment, capacitor energy storage circuit 31 is used in the air-blower control signal for receiving the output of the controller 20
When, control the ascending output of air-blower control signal.
Bleeder circuit 32 to the air-blower control signal of input for carrying out partial pressure adjusting, to avoid the electricity of air-blower control signal
When pressing through big, driving switch 40 is damaged, it is to be understood that the dividing ratios by adjusting bleeder circuit 32 can also control defeated
Go out to the size of the air-blower control signal in driving switch 40, and then adjusts the working condition of driving switch 40.
With continued reference to Fig. 2, further, in above-described embodiment, capacitor energy storage circuit 31 includes first resistor R1 and capacitance
Device C1, the input terminal of capacitor energy storage circuit 31 described in the first end of the first resistor R1, the second end of the first resistor R1
For the output end of the capacitor energy storage circuit 31, and it is connect with the first end of the capacitor C1；The second of the capacitor C1
End ground connection.
In the present embodiment, first resistor R1 forms charge circuit with capacitor C1, and moment is inputted in air-blower control signal, by
Voltage in the both ends capacitor C1 cannot be mutated by air-blower control signal shorts, and air-blower control signal is output to through capacitor C1
Ground at this point, air-blower control signal of the load at the both ends capacitor C1 is maximum, and is input to the air-blower control of capacitor energy storage circuit 31
Signal output is zero.Hereafter capacitor C1 is started to charge up, and the voltage value of the air-blower control signal at the both ends loading capacitance device C1 is gradual
Reduce, and the air-blower control signal output for being input to capacitor energy storage circuit 31 gradually increases, until capacitor C1 reaches saturation, this
When capacitor energy storage circuit 31 output air-blower control signal be equal to and be input to the air-blower control signal of capacitor energy storage circuit 31.Therefore
The slack time constant, τ of capacitor energy storage circuit 31 can determine by the capacity of capacitor C1 and the resistance value of first resistor R1,
That is τ=R1*C1.
With continued reference to Fig. 2, in above-described embodiment, the bleeder circuit 32 preferably uses second resistance R2 and 3rd resistor
R3, wherein the first end of the second resistance R2 is connect with the output end of the capacitor energy storage circuit 31, the second resistance R2
Second end be the bleeder circuit 32 output end, and connect with the first end of the 3rd resistor R3；3rd resistor R3's
Second end is grounded.
In the present embodiment, second resistance R2 and 3rd resistor R3 series connection partial pressures are big with the output for controlling air-blower control signal
Small, the ratio of second resistance R2 and 3rd resistor R3 are bigger, and the voltage that second resistance R2 is got is bigger, namely output is extremely driven
The air-blower control signal of dynamic switch 40 is also bigger.In this manner it is possible to by adjusting second resistance R2's and/or 3rd resistor R3
Resistance value adjusts the output to the air-blower control signal magnitude of driving switch 40.
With reference to Fig. 2, in a preferred embodiment, fan drive circuit 200 further includes the first one-way conduction element 50, described
First one-way conduction element 50 is connected in series between the controller 20 and the capacitor energy storage circuit 31；Described first is unidirectional
The input terminal of breakover element 50 is connect with the output end of the controller 20, the output end of the first one-way conduction element 50 with
The input terminal of the capacitor energy storage circuit 31 connects；The first one-way conduction element 50 is for detecting the controller 20
It is connected when the air-blower control signal of output, and exports the air-blower control signal.
In the present embodiment, in order to avoid the interference signal of late-class circuit is scurried into controller 20, and the isolation of signal is realized,
First one-way conduction element 50 is when detecting that controller 20 exports the air-blower control signal of high level, the first one-way conduction element
50 input terminal is high level and output end is low level, forms certain voltage difference and is connected, and exports air-blower control signal.
Further, in above-described embodiment, the first one-way conduction element 50 preferably uses the first diode D1, described
The anode of first diode D1 is the input terminal of the first one-way conduction element 50, and the cathode of the first diode D1 is institute
State the output end of the first one-way conduction element 50.
In the present embodiment, according to the one-way conduction of diode, when the anode of the first diode D1 receives high level
When air-blower control signal, the anode of the first diode D1 is high level at this time, and the cathode of the first diode D1 is led for low level
It is logical, and export air-blower control signal.Certainly in other embodiments, one-way conduction element can also be that letter may be implemented in optocoupler etc.
The one-way conduction element of number electrical isolation, is not limited herein.
With reference to Fig. 2, in a preferred embodiment, fan drive circuit 200 further includes the second one-way conduction element 60, described
The input terminal of second one-way conduction element 60 is connect with the controller 20, the output end of the second one-way conduction element 60 with
The input terminal of the bleeder circuit 32 connects.
In the present embodiment, when detecting that controller 20 exports low level air-blower control signal, the second one-way conduction member
The input terminal of part 60 is low level and output end is high level, forms certain voltage difference and is connected, and exports air-blower control letter
Number.
With continued reference to Fig. 2, further, the second one-way conduction element 60 preferably uses the second diode D2, wherein
The anode of the second diode D2 is the output end of the second one-way conduction element 60, the cathode of the second diode D2
For the input terminal of the second one-way conduction element 60.
In the present embodiment, according to the one-way conduction of diode, when the cathode of the second diode D2 receive it is low level
When air-blower control signal, the cathode extremely low level of the second diode D2 at this time, and the second diode D2 is connected for high level,
And export low level air-blower control signal.
With reference to Fig. 2, it is based on above-described embodiment, the fan drive circuit 200 still further comprises the 4th resistance R4, described
Wind turbine 100 includes positive power end and reverse electrical source end, and the driving switch 40 includes the first actuating station and the second actuating station, institute
The first end and the positive electricity end of driving power 10 and the wind turbine 100 for stating the 4th resistance R4 interconnect, the 4th resistance R4's
The negative electricity of second end and the wind turbine 100 is extreme and the first actuating station of the driving switch 40 interconnects, the driving switch 40
The second actuating station ground connection.
In the present embodiment, the 4th resistance R4 is current-limiting resistance, is burnt for avoiding the electric current of the output of driving power 10 excessive
Ruin driving switch 40.
Thought in order to better illustrate the present invention, below in conjunction with Fig. 1 and Fig. 2, to the concrete principle of circuit of the present invention into
Row illustrates：
Such as Fig. 1 and Fig. 2, when detecting the air-blower control signal of high level of the output of controller 20, the second diode is cut
Only, the first diode D1 conductings, and the air-blower control signal is exported to the charging electricity being made of first resistor R1 and capacitor C1
Road inputs moment in air-blower control signal, due to the voltage at the both ends capacitor C1 cannot be mutated and by air-blower control signal shorts,
Air-blower control signal is output to ground through capacitor C1, at this point, the air-blower control signal for being added in the both ends capacitor C1 is maximum, and exports
Air-blower control signal to the partial pressure unit of second resistance R2 and 3rd resistor R3 compositions is zero.Hereafter capacitor C1 starts to fill
Electricity, being added in the voltage value of the air-blower control signal at the both ends capacitor C1 can gradually subtract with the increase of capacitor C1 stored energies
It is small, and then second resistance R2 and the air-blower control signal of 3rd resistor R3 partial pressures go out gradual increase, NPN type triode Q1 starts to lead
It is logical, and it is operated in magnifying state, NPN type triode at this time is equivalent to an adjustable resistance, and partial pressure of connecting with wind turbine 100, this
The driving voltage of sample wind turbine 100 will gradually increase from zero, and be unlikely to generate excessive surge voltage.When capacitor C1 reaches
When saturation, NPN type triode Q1 enters the saturation state emitter of NPN type triode Q1 and collector at this time by magnifying state
Voltage very little and be equivalent to short circuit, the load completely of the voltage of driving power is in 100 both ends of wind turbine, wind turbine normal work.It keeps away in this way
The driving voltage for having exempted from wind turbine 100 is excessive and generates excessive surge voltage in NPN type triode Q1 conducting moments, burns three poles
Pipe.
When detecting the low level air-blower control signal that controller 20 exports, the first diode D1 cut-offs, the two or two
Pole pipe is connected, and exports the air-blower control signal, which exports through second resistance R2 to NPN type three
Pole pipe Q1 and make NPN type triode Q1 end so that positive power end and reverse electrical source of the electric current of driving power through wind turbine 100
End and driving switch 40 and be output to ground, be formed by current loop disconnection, and wind turbine 100 driven to be stopped.
The present invention is exponentially increased according to the charging characteristics of capacitor C1, the charging voltage of capacitor C1, capacitor C1 two
The voltage at end is gradually reduced and triode base voltage is made to be raised slowly to cut-in voltage from zero, i.e., enters amplification by cut-off state
State, then enter saturation state by magnifying state, being equivalent to one when the present invention is according to the amplification working condition characteristic of triode can
Adjust resistance the characteristics of, realize the driving voltage at 100 both ends of wind turbine be slowly increased namely flow through NPN type triode Q1 by it is small to
Big to increase, in this way, the driving current for avoiding wind turbine 100 is excessive and burns NPN type triode Q1, the present invention improves electromagnetism and adds
The protective capacities of hot equipment.
The present invention also proposes a kind of electromagnetic heating apparatus.
The electromagnetic heating apparatus includes wind turbine and fan drive circuit, and the concrete structure of the fan drive circuit is with reference to above-mentioned
Embodiment, since this electromagnetic heating apparatus uses whole technical solutions of all embodiments of above-mentioned fan drive circuit,
At least all advantageous effects caused by the technical solution with all embodiments of above-mentioned fan drive circuit, herein no longer one by one
It repeats.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the present invention.
Claims (11)
1. a kind of fan drive circuit (200) is applied in electromagnetic heating apparatus, the electromagnetic heating apparatus includes wind turbine
(100), which is characterized in that the fan drive circuit (200) includes the driving electricity that working power is provided to the wind turbine (100)
Source (10) and controller (20), wind turbine soft-start circuit (30) and driving switch (40), the driving switch (40) are series at
The wind turbine (100) is between ground, wherein
The controller (20), for exporting air-blower control signal；
The wind turbine soft-start circuit (30), for receiving the air-blower control signal, and control the air-blower control signal by
It is small to be exported to big；
The driving switch (40), the air-blower control signal for being exported according to the wind turbine soft-start circuit (30), adjusts it
The switch conduction degree of itself, to adjust the size of the wind turbine (100) driving voltage.
2. fan drive circuit (200) as described in claim 1, which is characterized in that the driving switch (40) is NPN type three
Pole pipe (Q1).
3. fan drive circuit (200) as described in claim 1, which is characterized in that wind turbine soft-start circuit (30) packet
Include capacitor energy storage circuit (31) and bleeder circuit (32), input terminal and the controller (20) of the capacitor energy storage circuit (31)
Connection, the output end of the capacitor energy storage circuit (31) are connect with the output end of the bleeder circuit (32)；The bleeder circuit
(32) output end is connect with the driving switch (40).
4. fan drive circuit (200) as claimed in claim 3, which is characterized in that the capacitor energy storage circuit (31) includes
First resistor (R1) and capacitor (C1), the first end of the first resistor (R1) are the input of the capacitor energy storage circuit (31)
End, the second end of the first resistor (R1) are the output end of the capacitor energy storage circuit (31), and with the capacitor (C1)
First end connection；The second end of the capacitor (C1) is grounded.
5. fan drive circuit (200) as claimed in claim 3, which is characterized in that the bleeder circuit (32) includes second
Resistance (R2) and 3rd resistor (R3), second resistance (R2) first end and the output end of the capacitor energy storage circuit (31) connect
Connect, the second end of the second resistance (R2) is the output end of the bleeder circuit (32), and with the 3rd resistor (R3)
First end connects；The second end of 3rd resistor (R3) is grounded.
6. fan drive circuit (200) as claimed in claim 3, which is characterized in that the fan drive circuit (200) is also wrapped
Include the first one-way conduction element (40), the first one-way conduction element (40) is connected in series in the controller (20) and described
Between capacitor energy storage circuit (31)；The output end of the input terminal and the controller (20) of the first one-way conduction element (40)
Connection, the output end of the first one-way conduction element (40) are connect with the input terminal of the capacitor energy storage circuit (31).
7. fan drive circuit (200) as claimed in claim 6, which is characterized in that the first one-way conduction element (50)
For the first diode (D1), the anode of first diode (D1) is the input terminal of the first one-way conduction element (50),
The cathode of first diode (D1) is the output end of the first one-way conduction element (50).
8. fan drive circuit (200) as claimed in claim 3, which is characterized in that the fan drive circuit (200) is also wrapped
The second one-way conduction element (60) is included, the input terminal of the second one-way conduction element (60) is connect with the controller (20),
The output end of the second one-way conduction element (60) is connect with the input terminal of bleeder circuit (32).
9. fan drive circuit (200) as claimed in claim 8, which is characterized in that the second one-way conduction element (60)
For the second diode (D2), the anode of second diode (D2) is the output end of the second one-way conduction element (60),
The cathode of second diode (D2) is the input terminal of the second one-way conduction element (60).
10. the fan drive circuit (200) as described in claim 1 to 9 any one, which is characterized in that the wind turbine driving
Circuit (200) further includes the 4th resistance (R4), and the wind turbine (100) includes positive power end and reverse electrical source end, the driving
It includes the first actuating station and the second actuating station, first end and the driving power (10) of the 4th resistance (R4) to switch (40)
And the positive power end interconnection of the wind turbine (100), the second end of the 4th resistance (R4) are reversed with the wind turbine (100)
First actuating station of power end and the driving switch (40) interconnects, the second actuating station ground connection of the driving switch (40).
11. a kind of electromagnetic heating apparatus, which is characterized in that the electromagnetic heating apparatus includes wind turbine (100) and such as claim 1
To the fan drive circuit (200) described in 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710159824.7A CN108626157B (en) | 2017-03-16 | 2017-03-16 | Fan driving circuit and electromagnetic heating equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710159824.7A CN108626157B (en) | 2017-03-16 | 2017-03-16 | Fan driving circuit and electromagnetic heating equipment |
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| Publication Number | Publication Date |
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| CN108626157A true CN108626157A (en) | 2018-10-09 |
| CN108626157B CN108626157B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004182A (en) * | 2006-01-16 | 2007-07-25 | 台达电子工业股份有限公司 | Fan system, and control device |
| CN202550940U (en) * | 2012-03-07 | 2012-11-21 | 上海御能动力科技有限公司 | Motor soft starting device |
| US20150270794A1 (en) * | 2014-03-20 | 2015-09-24 | Hamilton Sundstrand Corporation | Soft-start control for electromechanical devices using a resistor-capacitor circuit |
| CN206694297U (en) * | 2017-03-16 | 2017-12-01 | 佛山市顺德区美的电热电器制造有限公司 | Fan drive circuit and electromagnetic heating apparatus |
-
2017
- 2017-03-16 CN CN201710159824.7A patent/CN108626157B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004182A (en) * | 2006-01-16 | 2007-07-25 | 台达电子工业股份有限公司 | Fan system, and control device |
| CN202550940U (en) * | 2012-03-07 | 2012-11-21 | 上海御能动力科技有限公司 | Motor soft starting device |
| US20150270794A1 (en) * | 2014-03-20 | 2015-09-24 | Hamilton Sundstrand Corporation | Soft-start control for electromechanical devices using a resistor-capacitor circuit |
| CN206694297U (en) * | 2017-03-16 | 2017-12-01 | 佛山市顺德区美的电热电器制造有限公司 | Fan drive circuit and electromagnetic heating apparatus |
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| Publication number | Publication date |
|---|---|
| CN108626157B (en) | 2024-05-28 |
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