CN101640487B - Ultrasonic power system based on high frequency transformer feedback - Google Patents
Ultrasonic power system based on high frequency transformer feedback Download PDFInfo
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- CN101640487B CN101640487B CN2009100317595A CN200910031759A CN101640487B CN 101640487 B CN101640487 B CN 101640487B CN 2009100317595 A CN2009100317595 A CN 2009100317595A CN 200910031759 A CN200910031759 A CN 200910031759A CN 101640487 B CN101640487 B CN 101640487B
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- ultrasonic power
- high frequency
- resistance
- frequency pulse
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Abstract
The present invention discloses an ultrasonic power system based on high frequency transformer feedback, comprising an ultrasonic power, a matching inductor, an ultrasonic transducer, a non-inductive resistance, a high frequency pulse transformer, a phase discriminator and a DSP, wherein one output end of the ultrasonic power is connected with the matching inductor and the transducer in series in order and then is connected with one end of the non-inductive resistance and an end of a phase discrimination circuit resistance R1 respectively; the other end of the non-inductive resistance is connected with the other output end of the ultrasonic power; the output signal of the phase discrimination circuit is connected with the DSP; a primary terminal of the high frequency pulse transformer is connected with the output end of the ultrasonic power, one end of a secondary terminal of the high frequency pulse transformer is connected with one end of a phase discrimination circuit resistance R4 and the ground, and the other end of the secondary terminal of the high frequency pulse transformer is connected with the other end of the phase discrimination circuit resistance R4 and a 5th pin of an operation amplifier. The ultrasonic power system solves the problem of response delay in voltage phase measurement and reduces system error; and compared with a sensor, the high frequency transformer in the system has the advantages of small volume, light weight and low price.
Description
Technical field
The invention belongs to the supersonic generator field, specifically is a kind of ultrasonic power system.
Background technology
At present, adopting phase method to carry out in the sample circuit of ultrasonic power of frequency-tracking, what adopt all is transducer, give single-chip microcomputer or DSP with the sampled signal that obtains through phase discrimination processing then, by adjusting single-chip microcomputer or DSP output PWM wave frequency, and then change the frequency of ultrasonic power output voltage, thereby reach the purpose of frequency-tracking.Because there are operating lag in transducer, instrument transformer when measuring voltage, electric current, cause measuring not accurate, therefore when ultrasonic transducer resonance is higher, ultrasonic power to the tracking of resonance frequency can not accomplish fast, accurate.
Summary of the invention
In feedback element, there is operating lag in order to overcome existing ultrasonic power, causes ultrasonic power, the invention discloses ultrasonic power system based on the high frequency transformer feedback to the not accurate enough problem of the phase difference measurement of output voltage and electric current.
For solving the problems of the technologies described above, the invention provides a kind of ultrasonic power system based on the high frequency transformer feedback, comprise ultrasonic power, coupling inductance, ultrasonic transducer, noninductive resistance, phase discriminator and DSP, wherein ultrasonic power output is connected in series an end and the phase discriminator resistance R that connects described noninductive resistance behind coupling inductance, the transducer respectively successively
1An end, another output of the described ultrasonic power of another termination of described noninductive resistance, the output signal of phase discriminator meets DSP, it is characterized in that: also comprise high-frequency pulse transformer, two terminals in the former limit of described high-frequency pulse transformer connect two outputs of described ultrasonic power, the described phase discriminator resistance R of a termination of its secondary terminal
4An end and ground, the described phase discriminator resistance R of another termination
4The other end and 5 pin of operational amplifier.
Because high frequency transformer is when voltage transformation, its conversion time is very short, almost nil, therefore just the response time that exists in the voltage sample process can be dropped to almost nil, thereby eliminated the time delay that in the voltage-phase measuring process, exists, reached fast, accurately measured the purpose of ultrasonic power voltage pulse output phase information.
Beneficial effect: (1) has overcome the problem that has operating lag in the measurement of voltage-phase, has improved the accuracy of system to phase difference measurement, has reduced systematic error; (2) under identical specification requirement, the employed high frequency transformer of this programme has little, the lightweight advantage of volume with respect to transducer; (3) use the high frequency transformer that is similar to the EE10 type, has extremely strong price advantage, when using in batches, the high frequency transformer of an EE10 type has only about 0.2 to 0.5 yuan, can be under identical operating frequency then wants 50 to 80 yuan the transducer of operate as normal for one.
Description of drawings
Fig. 1 is E type core structure figure, and wherein (a) is front view, (b) is left view.
Fig. 2 is based on the main circuit diagram of the ultrasonic power system of high frequency transformer sampled voltage.
Fig. 3 is the phase discriminator figure of ultrasonic power.
Fig. 4 is the pulse voltage and the voltage waveform that adopts voltage sensor HNV025A sampling of ultrasonic power output.
Fig. 5 is the pulse voltage and the output voltage waveforms that adopts the high frequency transformer sampling of ultrasonic power output.
(a) among Fig. 4, Fig. 5 is the 25us/ lattice, (b) is the 10us/ lattice.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
As shown in Figure 1, the present invention adopts EE10 type ferrite core structure according to the designed high-frequency pulse transformer of technical requirement, and it is the copper conductor of 0.54mm that diameter is adopted on former limit, and former limit is around 18 circles, and it is the copper conductor of 0.72mm that secondary adopts diameter, and secondary is around 1 circle.A=10mm, B=5.4mm, C=4.65mm, D=4.2mm, E=7mm, F=2.4mm, the window area that can calculate EE type magnetic core are Aw=(E-F) D=19.32mm2.So just ultrasonic power main circuit output voltage amplitude can be reduced to control circuit required voltage size, and power circuit and control circuit can be isolated.
As shown in Figure 2, Ls is the coupling inductance, and the high-frequency pulse voltage of ultrasonic power inversion unit output is supplied with ultrasonic transducer work after the overmatching inductance is tuning; R is 0.5 ohm a noninductive resistance, just can represent the output current of ultrasonic power with this ohmically voltage; Ts is the designed high-frequency pulse transformer of the present invention, its former edge joint is to the pulse voltage output of ultrasonic power, its secondary terminal Sample_V+ ", " Sample_V-" and sample rate current " Sample_I+ ", " Sample_I-" receive respectively in the phase discriminator of ultrasonic power; will handle the signal that obtains through phase discriminator then and give DSP; as the basis of DSP change electric power output voltage frequency, and then reach the purpose of frequency-tracking.
As shown in Figure 3, sample rate current Sample_I+ connecting resistance R
1One end, resistance R
13 pin of another termination first operational amplifier LF353A.The 1 pin connecting resistance R of the first operational amplifier LF353A
2One end and 2 pin, 4 pin connect-the 15V power supply, and 8 pin connect+the 15V power supply, resistance R
23 pin of another termination first comparator LM393A.The 1 pin connecting resistance R of the first comparator LM393A
32 pin of one end, trigger 74LS74,2 pin of XOR gate 74LS86,2 pin of the first comparator LM393A and 4 pin ground connection, 8 pin connecting resistance R
3The other end and+the 5V power supply.1 pin, 4 pin of trigger 74LS74 connect+the 5V power supply, and 3 pin of trigger 74LS74 connect 1 pin, the resistance R of XOR gate 74LS86
67 pin of one end, the second comparator LM393B, the FLAG that 5 pin of trigger 74LS74 are drawn connects DSP (not drawing among the figure), resistance R
69 pin of another termination second comparator LM393B and+the 5V power supply.
Sampled voltage Sample_V+ connecting resistance R
45 pin of one end and the second operational amplifier LF353B, resistance R
4Other end ground connection and sampled voltage Sample_V-.6 pin of the second operational amplifier LF353B connect 7 pin and resistance R
5One end, 9 pin connect+the 15V power supply, and 10 pin connect-the 15V power supply, resistance R
55 pin of another termination second comparator LM393B.The 6 pin ground connection of the second comparator LM393B, 10 pin ground connection.The U_Pulse that 3 pin of XOR gate 74LS86 are drawn meets DSP (not drawing among the figure).
As shown in Figure 4, curve 1:0.5V/div is the voltage waveform of voltage sensor HNV025A output, and curve 2:20V/div (20 times of difference detector reductions) is the pulse voltage waveform of ultrasonic power output.As can be seen from the figure, curve 1 relative and curve 2 probably postpone 6 μ s, and the waveform distortion is serious.
As shown in Figure 5, curve 1:0.5V/div, for adopting the voltage waveform of high frequency transformer (Ts) output, curve 2:40V/div (20 times of difference detector reductions) is the pulse voltage waveform of ultrasonic power output.As can be seen from the figure, curve 1 relative and curve 2 does not almost postpone and distortion.
Claims (2)
1. ultrasonic power system based on high frequency transformer feedback, comprise ultrasonic power, coupling inductance, ultrasonic transducer, noninductive resistance, phase discriminator and DSP, connect an end of described noninductive resistance and the resistance R in the phase discriminator respectively after wherein ultrasonic power output is connected in series coupling inductance, transducer successively
1An end, another output of the described ultrasonic power of another termination of described noninductive resistance, the output signal of phase discriminator meets DSP, it is characterized in that: ultrasonic power system also comprises high-frequency pulse transformer, two terminals in the former limit of described high-frequency pulse transformer connect two outputs of described ultrasonic power, the resistance R in the described phase discriminator of a termination of its secondary terminal
4An end and ground, the resistance R in the described phase discriminator of another termination
4The other end and the normal phase input end of operational amplifier.
2. the ultrasonic power system based on the high frequency transformer feedback according to claim 1 is characterized in that: described high-frequency pulse transformer adopts EE type ferrite core structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100317595A CN101640487B (en) | 2009-07-07 | 2009-07-07 | Ultrasonic power system based on high frequency transformer feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100317595A CN101640487B (en) | 2009-07-07 | 2009-07-07 | Ultrasonic power system based on high frequency transformer feedback |
Publications (2)
| Publication Number | Publication Date |
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| CN101640487A CN101640487A (en) | 2010-02-03 |
| CN101640487B true CN101640487B (en) | 2011-11-09 |
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| CN2009100317595A Expired - Fee Related CN101640487B (en) | 2009-07-07 | 2009-07-07 | Ultrasonic power system based on high frequency transformer feedback |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795078A (en) * | 2010-03-31 | 2010-08-04 | 华南农业大学 | Ultrasonic power driving power supply with novel topological structure |
| WO2014047338A1 (en) * | 2012-09-19 | 2014-03-27 | Colorado Seminary, Which Owns And Operates The University Of Denver | System and method of improved micro channel performance |
| CN104516290A (en) * | 2013-09-30 | 2015-04-15 | 北京中电科电子装备有限公司 | Ultrasonic transducer driving power supply |
| CN105281590B (en) * | 2015-11-09 | 2017-09-19 | 江南大学 | The ultrasonic frequency detection method of ultrasonic wave biological processing |
| CN115395802B (en) * | 2022-08-29 | 2023-06-02 | 广东利元亨智能装备股份有限公司 | Ultrasonic power supply circuit and ultrasonic welding device |
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- 2009-07-07 CN CN2009100317595A patent/CN101640487B/en not_active Expired - Fee Related
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Granted publication date: 20111109 Termination date: 20130707 |