CN206211852U - Ultrasonic power circuit and ultrasonic cleaning apparatus - Google Patents
Ultrasonic power circuit and ultrasonic cleaning apparatus Download PDFInfo
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- CN206211852U CN206211852U CN201620552282.0U CN201620552282U CN206211852U CN 206211852 U CN206211852 U CN 206211852U CN 201620552282 U CN201620552282 U CN 201620552282U CN 206211852 U CN206211852 U CN 206211852U
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Abstract
A kind of ultrasonic power circuit and ultrasonic cleaning apparatus, including：There are module, two totem drive modules, filtration module and two switching tube circuit modules in input, rectification module, voltage changing module, ultrasonic wave transducer module, capacitive cancellation module, pulse width modulating signal；Input is connected with rectification module, voltage changing module is connected with rectification module, two switching tubes electricity module and ultrasonic wave transducer module respectively, each totem drive module respectively with a switching tube electricity module, there is module with pulse width modulating signal respectively and be connected in two totem drive modules, capacitive cancellation module is connected with ultrasonic wave transducer module, and voltage changing module is also grounded by filtration module.Above-mentioned ultrasonic power circuit and ultrasonic cleaning apparatus, after each pulse width modulating signal is via totem drive module and switching tube circuit module, drive the work of ultrasonic wave transducer module to produce ultrasonic wave by voltage changing module, significantly reduce caloric value in ultrasonic power, extend the life-span of circuit.
Description
Technical field
The utility model is related to electronic circuit technology field, and more particularly to a kind of ultrasonic power circuit and application should
The ultrasonic cleaning apparatus of ultrasonic power circuit.
Background technology
Ultrasonic wave can act on the surface for efficiently cleaning object by " cavitation ", so that ultrasonic cleaning technology exists
Industrial circle is widely used.So-called " cavitation ", that is, refer to the micro-bubble (cavitation nucleus) being present in liquid in ultrasonic field
In the presence of vibration, growth and constantly aggregation sound field energy, when energy reaches certain threshold value, cavitation bubble drastically collapses closure
Process.The μ s of the life-span of cavitation bubble about 0.1, it can release huge energy when drastically collapsing, and produce speed to be about
110m/s, the microjet for having strong impact power.In recent years, ultrasonic cleaning technology has progressed into commercial market, for example ultrasound
Baume looks, supersonic vegetable washing machine, ultrasonic wave dishwasher etc..
At present, in ultrasonic wave cleaning product, if necessary to cleaning than larger object surface, ultrasonic wave cleaning is generally needed
Than larger power output, from tens watts to several kilowatts.Traditional implementation method be by mains 220V rectifications it
Liter is pressed into high-voltage ac power by way of self-excitation or his Induced Oscillation afterwards, drives one or more piezoelectric ceramic pieces or piezoelectricity to make pottery
Porcelain oscillator, changes into ultrasonic wave and exports by the electromechanical transducing of piezoelectric ceramics, is then passed to water body, acts on clear by " cavitation "
Wash object surface.However, the equipment of traditional ultrasonic power by the way of self-excitation or his Induced Oscillation often stability is poor,
Service life is short.
Utility model content
Based on this, it is necessary to for how improving the stability of equipment, how to improve the technical problems such as service life, there is provided
A kind of ultrasonic power circuit and the ultrasonic cleaning apparatus using the ultrasonic power circuit.
A kind of ultrasonic power circuit, including：Input, rectification module, voltage changing module, ultrasonic wave transducer module, capacitive
There is module, two totem drive modules, filtration module and two switching tubes electricity in cancellation module, the pulse width modulating signal
Road module；
The input is connected with rectification module, the voltage changing module respectively with the rectification module, two switching tube circuits
Module and ultrasonic wave transducer module are connected, each totem drive module respectively with a switching tube circuit module one a pair
Should connect, totem drive module described in two occurs module and is connected with the pulse width modulating signal respectively, and the capacitive disappears
Except module is connected with the ultrasonic wave transducer module, the voltage changing module is also grounded by the filtration module.
Wherein in one embodiment, the voltage changing module includes push-pull transformer, the rectification module and described
Switching tube circuit module is connected to the primary side of the push-pull transformer, and the ultrasonic wave transducer module is connected to described pushing away
The secondary of pull transformer.
Wherein in one embodiment, the switching tube circuit module includes metal oxide semiconductor field effect transistor
Pipe, the drain electrode of the mos field effect transistor is connected to the primary side of the push-pull transformer, and grid connects
Totem drive module described in one is connected to, source electrode is connected to the pulse width modulating signal and module occurs.
Wherein in one embodiment, the switching tube circuit module includes insulated gate bipolar transistor, the insulation
The drain electrode of grid bipolar transistor is connected to the primary side of the push-pull transformer, and grid is connected to totem described in and drives mould
Block, source electrode is connected to the pulse width modulating signal and module occurs.
Wherein in one embodiment, the capacitive cancellation module includes coupling inductance, and the coupling inductance is connected to institute
State the secondary of push-pull transformer, and with the ultrasonic wave transducer wired in parallel.
Wherein in one embodiment, the coupling inductance is electrodynamic capacity adjustable type coupling inductance.
Wherein in one embodiment, the ultrasonic wave transducer module includes piezoelectric ceramic piece, the piezoelectric ceramic piece two
End is connected to the secondary of the push-pull transformer.
Wherein in one embodiment, the totem drive module includes PNP transistor and NPN transistor, institute
Stating the colelctor electrode of PNP transistor is used to connect supply voltage, and base stage is connected to the pulse width modulating signal and module occurs,
Emitter stage is connected to the switching tube circuit module, and the colelctor electrode of the NPN transistor is connected to the switching tube circuit mould
Block, base stage is connected to the base stage of the PNP transistor, grounded emitter.
Wherein in one embodiment, the pulse width modulating signal occurs module includes fixed frequency pulse width modulated electricity
Road.
A kind of ultrasonic cleaning apparatus, with ultrasonic power circuit as described above.
, there is module by pulse width modulating signal and produce in above-mentioned ultrasonic power circuit and ultrasonic cleaning apparatus
The anti-phase pulse width modulating signal of two-way, each pulse width modulating signal is via totem drive module and switching tube circuit
After module, output to voltage changing module drives the work of ultrasonic wave transducer module to produce ultrasonic wave by voltage changing module, realizes no-voltage
Switching technique, significantly reduces caloric value in ultrasonic power, extends the life-span of circuit, while reducing noise and electromagnetic interference.
Brief description of the drawings
Fig. 1 is the circuit module schematic diagram of ultrasonic power circuit in one embodiment；
Fig. 2 is the electrical block diagram of ultrasonic power circuit in one embodiment；
Fig. 3 is the ZVT measured curve schematic diagram of one embodiment breaker in middle pipe.
Specific embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand the utility model.But the utility model can be implemented with being much different from other manner described here, this area
Technical staff can do similar improvement in the case of without prejudice to the utility model intension, therefore the utility model does not receive following public affairs
The limitation of the specific embodiment opened.
It is noted that PWM refers to Pulse Width Modulation, i.e. pulse width modulating signal.DSP refers to
Digital Signal Processing, i.e. Digital Signal Processing.MOS refers to Metal Oxide Semiconductor, i.e.,
Mos field effect transistor.IGBT refers to Insulated Gate Bipolar Transistor, that is, insulate
Grid bipolar transistor.
Fig. 1 is referred to, it is the circuit module schematic diagram of ultrasonic power circuit 10 in one embodiment, ultrasonic power
Circuit 10 includes input 101, rectification module 102, voltage changing module 103, ultrasonic wave transducer module 104, capacitive cancellation module
105th, there is module 106, two totem drive modules 107, two switching tube circuit modules 108 and filter in pulse width modulating signal
Ripple module 109.
Input 101 is connected with rectification module 102, voltage changing module 103 respectively with rectification module 102, two switching tube circuits
Module and ultrasonic wave transducer module 104 are connected, and each totem drive module 107 connects with a switching tube circuit module respectively
Connect, two totem drive modules 107 respectively with pulse width modulating signal occur module 106 be connected, capacitive cancellation module 105 with
Ultrasonic wave transducer module 104 is connected, and voltage changing module 103 is also grounded by filtration module 109.
Input 101 is used for input AC electricity, and rectification module 102 is used for alternating current that rectification is input into by input 101 simultaneously
To voltage changing module 103, pulse width modulating signal occurs module 106 to be used to produce two anti-phase pulse width modulation letters for output
Number, each totem drive module 107 is used to receive a pulse width modulating signal and drives output to a switching tube circuit mould
Block 108, two switching tube circuit modules 108 are used to being respectively connecting to voltage changing module 103, and voltage changing module 103 is by pulse width modulation
Ultrasonic wave transducer module 104 is driven after signal boosting, capacitive cancellation module 105 is used to eliminate the appearance of ultrasonic wave transducer module 104
Property electric current.
Further, totem drive module 107 includes that the first totem drive module 1071 and the second totem drive
Module 1072.Switching tube circuit module 108 includes first switch pipe circuit module 1081 and second switch pipe circuit module
1082。
Input 101 is connected with rectification module 102, and input 101 is used for that input AC to be electric and the rectification of rectified module 102
Output.Voltage changing module 103 respectively with rectification module 102, first switch pipe circuit module 1081, second switch pipe circuit module
1082 and ultrasonic wave transducer module 104 connect.There is module and mould driven by the first totem in pulse width modulating signal 106
Block 1071 is connected with first switch pipe circuit module 1081, by the second totem drive module 1072 and second switch pipe circuit
Module 1082 is connected, and capacitive cancellation module 105 is connected with ultrasonic wave transducer module 104.
Pulse width modulating signal 106 occurs module to be used to produce the two anti-phase Hes of the first pulse width modulating signal 106
Second pulse width modulating signal 106.First totem drive module 1071 is used to amplify the first pulse width modulating signal 106
And first switch pipe circuit module 1081 is driven, and exported to voltage changing module 103 by first switch pipe circuit module 1081.Second
Totem drive module 1072 is used to amplify the second pulse width modulating signal 106 and drive second switch pipe circuit module
1082, and exported to voltage changing module 103 by second switch pipe circuit module 1082.
Voltage changing module 103 is used for will be by rectification module 102, first switch pipe circuit module 1081 and second switch pipe electricity
Ultrasonic wave transducer module 104 is driven after the input boosting of road module 1082.Capacitive cancellation module 105 is used to eliminate ultrasonic wave transducer
The capacity current of module 104.
, there is module by pulse width modulating signal and produce the anti-phase pulse width of two-way in above-mentioned ultrasonic power circuit
Modulated signal, after each pulse width modulating signal is via totem drive module and switching tube circuit module, output to transformation
Module, drives the work of ultrasonic wave transducer module to produce ultrasonic wave by voltage changing module, realizes zero voltage switching technology, significantly
Reduce caloric value in ultrasonic power, extend the life-span of circuit, while reducing noise and electromagnetic interference.
Further, filtration module 109 is used to filter high frequency electric present in the circuit after rectification.In an embodiment
In, filtration module 109 is filter capacitor.
Further, voltage changing module includes push-pull transformer, and rectification module and two switching tube circuit modules connect respectively
The primary side of push-pull transformer is connected to, ultrasonic wave transducer module is connected to the secondary of push-pull transformer.Push-pull transformer will
Ultrasonic wave transducer module is driven after pulse width modulating signal boosting.
Further, switching tube circuit module includes mos field effect transistor, metal oxide half
The drain electrode of conductor field-effect transistor is connected to the primary side of push-pull transformer, and grid is connected to a totem drive module, source
Pole is connected to pulse width modulating signal and module occurs.
Further, switching tube circuit module includes insulated gate bipolar transistor, the leakage of insulated gate bipolar transistor
Pole is connected to the primary side of push-pull transformer, and grid is connected to a totem drive module, and source electrode is connected to pulse width modulation
Signal generating module.
Further, capacitive cancellation module includes coupling inductance, and coupling inductance is connected to the secondary of push-pull transformer, and
With ultrasonic wave transducer wired in parallel.Because piezoelectric ceramic piece belongs to capacitive device, it is necessary to one coupling inductance of serial or parallel connection disappears
Except capacitive.But series inductance can cause that the series resonance frequency of piezoelectric ceramic piece occurs than larger variation, therefore herein using simultaneously
Connection inductance.
Further, coupling inductance is electrodynamic capacity adjustable type coupling inductance.Because the parameter of piezoelectric ceramic piece has necessarily
Error range, so the coupling inductance of parallel connection is adjustable coupling inductance, 14, coupling inductance band in the present embodiment is taken out
Head, can meet actual adjustment needs.
Further, ultrasonic wave transducer module includes piezoelectric ceramic piece, and piezoelectric ceramic piece two ends are connected to push-pull type transformation
The secondary of device.It is appreciated that using push-pull configuration, the bootstrap driver of the MOS/IGBT in full-bridge/half-bridge structure is eliminated, by
The anti-phase PWM1 of two-way, PWM2 signals directly drive MOS/IGBT through totem.MOS/IGBT outputs to recommending step-up transformer,
Isolation drive piezoelectric ceramic piece.
Further, totem drive module includes PNP transistor and NPN transistor, the current collection of PNP transistor
Pole is used to connect supply voltage, and base stage is connected to pulse width modulating signal and module occurs, and emitter stage is connected to switching tube circuit
Module, the colelctor electrode of NPN transistor is connected to switching tube circuit module, and base stage is connected to the base stage of PNP transistor, transmitting
Pole is grounded.
Further, pulse width modulating signal occurs module includes fixed frequency pulse-width modulation circuit.Further, arteries and veins
Rushing bandwidth modulation signals generation module includes digital signal processor.Fixed frequency pulse-width modulation circuit or Digital Signal Processing
Device is used to the pwm signal for producing two-way anti-phase.It is appreciated that the anti-phase pwm signal of two-way can be produced by hardware circuit, or by
Dsp processor output is produced.The set of frequency of pwm signal is 40KHz, can carry out frequency trim by an adjustable resistor, its
Dutycycle can be set or software set by capacitance-resistance.
Fig. 2 is referred to, it is the electrical block diagram of ultrasonic power circuit in one embodiment, in the present embodiment,
Realize that 120 watts of ultrasonic power circuits that ZVS (Zero Voltage Switch, ZVT) is switched are with frequency trim
Example, two-way PWM1 and PWM2 are exported using TL494 chips, and frequency is adjusted by the adjustable resistor of a 2kohm.Meanwhile,
Power needs according to the present embodiment, employ metal-oxide-semiconductor as switching tube.
The circuit structure includes：Zero line input N, live wire input L, full-bridge rectifier D1, electric capacity C4, electric capacity C5, open
Close pipe MOS1, switching tube MOS2, transformer T1, coupling inductance L1, piezoelectric ceramic piece CE, resistance R2, resistance R3, slide rheostat
R4, transistor Q1~Q4, chip U1.
Chip U1 has 16 pins, and wherein pin 13 is connected with 14, and pin 12,8 and 11 is connected to supply voltage
VCC.Pin 9 and 10 is respectively pwm signal output pin.Pin 7 is grounded.Pin 6 is connect by resistance R3 and slide rheostat R4
Ground.Pin 6 is grounded by electric capacity C5.
Live wire input L is connected to the ac input end 1 of full-bridge rectifier D1, and zero line input N is connected to full-bridge rectification
The ac input end 2 of device D1.The DC output end 2 of full-bridge rectifier D1 is connected with transformer T1, the direct current of full-bridge rectifier D1
Output end 4 is grounded.
Drain electrode of the two ends of the primary side of transformer T1 respectively with switching tube MOS1 and switching tube MOS2 is connected.Transformer T1's
Primary side is also grounded by electric capacity C4.The secondary of transformer T1 is connected with piezoelectric ceramic piece CE, coupling inductance L1 and piezoelectric ceramic piece
CE is in parallel.
The grid of switching tube MOS1 is connected with the emitter stage of transistor Q1, and source electrode is connected to the pin 4 of chip U1.Switching tube
The grid of MOS2 is connected with the emitter stage of transistor Q3, and source electrode is connected to the pin 4 of chip U1 and is grounded by resistance R2.
The base stage of transistor Q1 is connected with the pin 10 of chip U1, and colelctor electrode is connected to supply voltage VCC.Transistor Q2's
Base stage is connected with the base stage of transistor Q1, and emitter stage is connected with the emitter stage of transistor Q1, grounded collector.Transistor Q3's
Base stage is connected with the pin 9 of chip U1, and colelctor electrode is connected to supply voltage VCC.The base stage of transistor Q4 and the base of transistor Q3
Pole connects, and emitter stage is connected with the emitter stage of transistor Q3, grounded collector.In the present embodiment, transistor Q1 and Q3 are positive-negative-positive
Transistor, transistor Q2 and Q4 are NPN transistor.
For example, a kind of ultrasonic cleaning apparatus, it has ultrasonic power circuit described in any of the above-described embodiment；And for example,
A kind of supersonic vegetable washing machine, it has ultrasonic power circuit described in any of the above-described embodiment；Above-described embodiment is directed to 120 watts
Supersonic vegetable washing machine.The equipment by AC220V 50Hz mains-supplied, output peak-to-peak value for 600V 40KHz exchange it is high
Pressure, drives six piezoelectric ceramic piece work of parallel connection.In the present embodiment, piezoelectric ceramic piece is by being adhesive in a basin for stainless steel
Under sub, sent during work in the water body in ultrasonic wave to basin, utilize the vegetables or other placed in " cavitation " effect sink
Object.
Push-pull configuration is used in the present embodiment, the bootstrap driver of the MOS/IGBT in full-bridge/half-bridge structure is eliminated, by
The anti-phase PWM1 of two-way, PWM2 signals directly drive MOS/IGBT through totem.MOS/IGBT outputs to recommending step-up transformer,
Isolation drive piezoelectric ceramic piece, the power needs according to present embodiment, employs metal-oxide-semiconductor as switching tube.
Because piezoelectric ceramic piece belongs to capacitive device, it is necessary to one coupling inductance of serial or parallel connection eliminates capacitive.But series connection
Inductance can cause that the series resonance frequency of piezoelectric ceramic piece occurs than larger variation, therefore use shunt inductance herein.Due to pressure
The parameter of electroceramics piece has certain error range, so shunt inductance is adjustable, the coupling inductance band in the present embodiment
14 taps, can meet actual adjustment needs.
The anti-phase pwm signal of two-way can be produced by hardware circuit, or export generation by DSP.The set of frequency of pwm signal is
40KHz, can carry out frequency trim by an adjustable resistor, and its dutycycle can be set or software set by capacitance-resistance.The present embodiment
Middle use TL494 chips export two-way PWM1 and PWM2, and frequency is adjusted by the adjustable resistor of a 2kohm.
Remain that two transformer inputs are anti-phase during push-pull type arrangement works, when one end input pulse is turned on, should
The drain electrode of corresponding metal-oxide-semiconductor or the colelctor electrode of IGBT is held to be changed into low level, Transformer Winding is started to charge up and passes through secondary output
Winding charges to the direct capacitance of coupling inductance and piezoelectric ceramics；Two input windings are in free oscillation side when pulse is closed
Formula, now coupling inductance and piezoelectric ceramic piece direct capacitance produce resonance so that input winding both end voltage start change；Together
When piezoelectric ceramic piece transducer start resonant operational.
If just resonance on the Frequency point of PWM, is formed in transformer inputs for coupling inductance and piezoelectric ceramic piece
One ZVS on off state：Input terminal voltage curve climbs to after peak, is closed after the conducting of another transformer inputs,
Now curve is dropped to zero-point voltage by the voltage at previously input end, subsequently into next cycle circulation.
But actually because the manufacture craft of piezoelectric ceramic piece and coupling inductance is constantly present certain error scope, so
The resonant frequency of coupling inductance and piezoelectric ceramic piece always deviates the Frequency point of PWM.Thus the voltage of transformer inputs is caused
When PWM is turned on, zero point is not on, can now cause MOS/IGBT to produce substantial amounts of switching loss, temperature rise is increased, when serious
Metal-oxide-semiconductor can be burnt.Therefore the output frequency of adjustment PWM is needed, the resonant frequency of coupling inductance and piezoelectric ceramic piece is closer to.
Adjustment PWM frequency, to ensure that the no-voltage time is fully defined enough.
It should also be noted that when the output frequency for adjusting PWM meets ZVT, if the frequency of PWM now
Beyond the permission operating frequency range of piezoelectric ceramic piece, ultrasonic transducer is easy to be burned out, so coupling electricity should be finely tuned
Sense, makes resonant frequency return to normal frequency scope：If PWM frequency is relatively low, coupling inductance is turned down；If PWM frequency is higher,
Then tune up coupling inductance.Coupling inductance has been adjusted every time, it is necessary to proofread whether PWM output frequencies meet ZVT again,
Be allowed to try one's best the resonant frequency of coupling inductance and piezoelectric ceramic piece.
After being adjusted through overfrequency adjustment and coupling inductance in the present embodiment, the temperature measurement of metal-oxide-semiconductor is 15 degree or so, defeated
Go out ultrasonic frequency in 40.6KHz, meet normal operation needs.As shown in figure 3, it is a ZVT for metal-oxide-semiconductor
The corresponding curve of measured curve, wherein 1+ represents pwm signal all the way, and the corresponding curves of 2+ represent the change of the drain voltage of metal-oxide-semiconductor
Change.
The utility model has the advantage of：By zero voltage switching technology, significantly reduce MOS/ in ultrasonic power
The heating of IGBT, extends its life-span, while reducing noise and electromagnetic interference.The coupling inductance of fine setting PWM frequency and piezoelectric ceramics,
Ensure working frequency and the life-span of piezoelectric ceramics；Fine setting PWM frequency so that ultrasonic power coordinates more closely with piezoelectric ceramics,
Reduce unnecessary energy dissipation；Using push-pull configuration, high voltage bootstrap circuit can be reduced, it is only necessary to two MOS/IGBT, cost
It is more excellent.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (9)
1. a kind of ultrasonic power circuit, it is characterised in that including：Input, rectification module, voltage changing module, ultrasonic wave transducer
Module, capacitive cancellation module, pulse width modulating signal generation module, two totem drive modules, filtration module and two open
Close pipe circuit module；
The input is connected with rectification module, the voltage changing module respectively with the rectification module, two switching tube circuit modules
And ultrasonic wave transducer module is connected, each totem drive module corresponds with a switching tube circuit module connect respectively
Connect, totem drive module described in two occurs module and is connected with the pulse width modulating signal respectively, and the capacitive eliminates mould
Block is connected with the ultrasonic wave transducer module, and the voltage changing module is also grounded by the filtration module；
The voltage changing module includes push-pull transformer, and the rectification module and the switching tube circuit module are connected to
The primary side of the push-pull transformer, the ultrasonic wave transducer module is connected to the secondary of the push-pull transformer.
2. ultrasonic power circuit according to claim 1, it is characterised in that the switching tube circuit module includes metal
Oxide semiconductor field effect transistor, the drain electrode of the mos field effect transistor is connected to described recommending
The primary side of formula transformer, grid is connected to totem drive module described in, and source electrode is connected to the pulse width modulating signal
Generation module.
3. ultrasonic power circuit according to claim 1, it is characterised in that the switching tube circuit module includes insulation
Grid bipolar transistor, the drain electrode of the insulated gate bipolar transistor is connected to the primary side of the push-pull transformer, grid
Totem drive module described in one is connected to, source electrode is connected to the pulse width modulating signal and module occurs.
4. ultrasonic power circuit according to claim 3, it is characterised in that the capacitive cancellation module includes coupling electricity
Sense, the coupling inductance is connected to the secondary of the push-pull transformer, and with the ultrasonic wave transducer wired in parallel.
5. ultrasonic power circuit according to claim 4, it is characterised in that the coupling inductance is that electrodynamic capacity is adjustable
Type coupling inductance.
6. ultrasonic power circuit according to claim 4, it is characterised in that the ultrasonic wave transducer module includes piezoelectricity
Potsherd, the piezoelectric ceramic piece two ends are connected to the secondary of the push-pull transformer.
7. ultrasonic power circuit according to claim 6, it is characterised in that the totem drive module includes PNP
Transistor npn npn and NPN transistor, the colelctor electrode of the PNP transistor are used to connect supply voltage, and base stage is connected to described
There is module in pulse width modulating signal, emitter stage is connected to the switching tube circuit module, the current collection of the NPN transistor
Pole is connected to the switching tube circuit module, and base stage is connected to the base stage of the PNP transistor, grounded emitter.
8. ultrasonic power circuit according to claim 7, it is characterised in that the pulse width modulating signal occurs mould
Block includes fixed frequency pulse-width modulation circuit.
9. a kind of ultrasonic cleaning apparatus, it is characterised in that with the ultrasonic power as described in any one of claim 1 to 8
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620552282.0U CN206211852U (en) | 2016-06-07 | 2016-06-07 | Ultrasonic power circuit and ultrasonic cleaning apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620552282.0U CN206211852U (en) | 2016-06-07 | 2016-06-07 | Ultrasonic power circuit and ultrasonic cleaning apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436574A (en) * | 2017-07-27 | 2017-12-05 | 北京东方赛腾科技有限公司 | A kind of multifunctional signal generator and its signal generating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436574A (en) * | 2017-07-27 | 2017-12-05 | 北京东方赛腾科技有限公司 | A kind of multifunctional signal generator and its signal generating method |
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Granted publication date: 20170531 Termination date: 20210607 |