CN202617032U

CN202617032U - Ultrasonic power supply

Info

Publication number: CN202617032U
Application number: CN2012202598336U
Authority: CN
Inventors: 张建春
Original assignee: SHENZHEN RIGAO TECHNOLOGY CO LTD
Current assignee: SHENZHEN RIGAO TECHNOLOGY CO LTD
Priority date: 2012-06-04
Filing date: 2012-06-04
Publication date: 2012-12-19
Anticipated expiration: 2022-06-04

Abstract

The utility model discloses an ultrasonic power supply, which comprises a pulse width modulation circuit unit, and a phase shifting control voltage circuit unit, wherein the pulse width modulation circuit unit is used for generating an initial first frequency signal from the first output end and a second frequency signal from the second output end, and the phase shifting control voltage circuit unit is connected with the phase shifting control voltage circuit unit. The ultrasonic power supply also comprises a first error code generation preventing unit connected with the first output end and used for generating a third frequency signal and a second error code generation preventing unit connected with the second output end and used for generating a fourth frequency signal. The ultrasonic power supply provided by the utility model has the advantages of little impact current, high frequency precision, easy inhibition of EMI (Electro-Magnetic Interference) conduction, better cleaning effect, and easy realization of power automatic control.

Description

A kind of ultrasonic power

Technical field

The utility model relates to a kind of ultrasonic power.

Background technology

Ultrasonic power is commonly referred to ultrasonic wave generating source, supersonic generator.Its effect is to convert electric energy to be complementary with ultrasonic transducer the high-frequency ac signal of telecommunication.The principle of ultrasonic power is the signal that is at first produced a CF by signal generator; This signal can be a sinusoidal signal; Also can be pulse signal, this CF be exactly the frequency of transducer, and fairly perfect ultrasonic power also should have feedback element; The feedback signal of two aspects mainly is provided: first provides the power output signal, and we know that power supply (voltage) when generator is when changing.The power output of generator also can change, and at this moment being reflected on the transducer is exactly that mechanical oscillation are suddenly big or suddenly small, causes cleaning performance unstable.Therefore need to stablize power output,, make power amplification stable through the corresponding adjustment power amplifier of power feedback signal.Second provides the frequency-tracking signal.It is most effective when transducer is operated in resonant frequency point; It is the most stable to work; And the resonant frequency point of transducer can change owing to the aging back of assembling reason and work, and the frequency of certain this change is drift just, and it is not very big changing; The frequency-tracking signal can control-signals generator, makes the frequency of signal generator follow the tracks of the resonant frequency point of transducer within the specific limits.

But, the problem below existing ultrasonic power exists:

1. can't solve the needed power output adjustment of ultrasonic power circuit, existing circuit must add silicon-controlled voltage regulation circuit or other DC-DC change-over circuit in prime, and cost is very high;

2. though existing phase whole-bridging circuit can solve power adjustment problem; But can't solve existing cost high (external mainstream chip price is mostly more than 50 yuans); And peripheral circuit is complicated, and FREQUENCY CONTROL is unstable, the not high serious problems of frequency accuracy;

3. there is serious input current spike problem in existing silicon-controlled voltage regulation circuit, when input voltage in 90 degree and 270 degree time, the input peak current is very high, PF value is very low, EMI low frequency conduct radiation is difficult to suppress, and electric power system is influenced very big;

4.DC-DC power regulation circuit must guarantee to have enough big input capacitance if want steady operation, and is when too big as if input capacitance (greater than 47UF), very serious to the ultrasonic cleaning influential effect.

The utility model content

The utility model proposes a kind of ultrasonic power, has solved the problem that the prior art cost is high, peripheral circuit is complicated, FREQUENCY CONTROL is unstable, frequency accuracy is not high.

The technical scheme of the utility model is achieved in that

The utility model discloses a kind of ultrasonic power; Comprise that being used for producing initial first frequency signal from first output reaches from the pulse width modulation circuit unit of the second frequency signal of second output generation; With the phase shift controlling voltage circuit unit that described pulse width modulation circuit unit links to each other, also comprise first anti-error code generation unit of generation the 3rd frequency signal that links to each other with described first output and the second anti-error code generation unit that is used to produce the 4th frequency signal that links to each other with described second output.

In the described ultrasonic power of the utility model; The described first anti-error code generation unit comprises first circuit unit; First comparator that links to each other with first circuit unit and the triode constant-current circuit unit that links to each other with described first comparator; First circuit unit comprises: four resistance, four second comparators and diodes, and wherein, each resistance and each second comparator are connected to form set of circuits; Every group of circuit is in parallel, and is input to described first comparator through described diode.

In the described ultrasonic power of the utility model; Described constant-current circuit unit comprises first triode and second triode; The base stage of first triode is connected with the output of described first comparator with the common junction that is connected of the collector electrode of second triode, and the emitter of first triode is exported the 3rd frequency signal with the common junction after the emitter of second triode is connected.

In the described ultrasonic power of the utility model; The described second anti-error code generation unit comprises the second circuit unit; The 3rd comparator that links to each other with the second circuit unit and the triode constant-current circuit unit that links to each other with described the 3rd comparator; The second circuit unit comprises: four resistance, four the 4th comparators and diodes, and wherein, each resistance and each the 4th comparator are connected to form set of circuits; Every group of circuit is in parallel, and is input to described the 3rd comparator through described diode.

In the described ultrasonic power of the utility model; Described constant-current circuit unit comprises the 3rd triode and the 4th triode; The base stage of the 3rd triode is connected with the output of described the 3rd comparator with the common junction that is connected of the collector electrode of the 4th triode, and the emitter of the 3rd triode is exported the 4th frequency signal with the common junction after the emitter of the 4th triode is connected.

Implement a kind of ultrasonic power of the utility model, have following beneficial technical effects:

1. cost is very low, and with the ultrasonic waves for cleaning power supply of 3KW, its cost can hang down about 100 yuan than the controllable silicon method, can hang down about 150 yuan than the DC-DC conversion, and than main flow phase shift chip, cost low about 50;

2. the opinion with technical parameter, the PF value is high, and impulse current is little, and frequency accuracy is high, and the EMI conduction suppresses easily, and cleaning performance is better, realizes that easily power controls automatically, and control precision and stability are all far above other three.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of a kind of ultrasonic power of the utility model;

Fig. 2 is the pulse width modulation circuit unit Connection Element sketch map among Fig. 1;

Fig. 3 is the anti-error code generation unit Connection Element sketch map of first among Fig. 1;

Fig. 4 is the anti-error code generation unit Connection Element sketch map of second among Fig. 1;

Fig. 5 is the phase shift controlling voltage circuit unit Connection Element sketch map among Fig. 1.

Embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

See also Fig. 1; The embodiment of the utility model; Comprise that being used for producing initial first frequency signal from first output reaches from the pulse width modulation circuit unit 10 of the second frequency signal of second output generation; The phase shift controlling voltage circuit unit 20 that links to each other with pulse width modulation circuit unit 10 also comprises first anti-error code generation unit 30 of generation the 3rd frequency signal that links to each other with first output and the second anti-error code generation unit 40 that is used to produce the 4th frequency signal that links to each other with described second output.

The first anti-error code generation unit 30 comprises first circuit unit; First comparator that links to each other with first circuit unit and the triode constant-current circuit unit that links to each other with first comparator; First circuit unit comprises: four resistance, four second comparators and diodes, and wherein, each resistance and each second comparator are connected to form set of circuits; Every group of circuit is in parallel, and is input to described first comparator through described diode.

The constant-current circuit unit comprises first triode and second triode; The base stage of first triode is connected with the output of described first comparator with the common junction that is connected of the collector electrode of second triode, and the emitter of first triode is exported the 3rd frequency signal with the common junction after the emitter of second triode is connected.

The second anti-error code generation unit 40 comprises the second circuit unit; The 3rd comparator that links to each other with the second circuit unit and the triode constant-current circuit unit that links to each other with described the 3rd comparator; The second circuit unit comprises: four resistance, four the 4th comparators and diodes, and wherein, each resistance and each the 4th comparator are connected to form set of circuits; Every group of circuit is in parallel, and is input to described the 3rd comparator through described diode.Wherein, The constant-current circuit unit comprises the 3rd triode and the 4th triode; The base stage of the 3rd triode is connected with the output of described the 3rd comparator with the common junction that is connected of the collector electrode of the 4th triode, and the emitter of the 3rd triode is exported the 4th frequency signal with the common junction after the emitter of the 4th triode is connected.

See also Fig. 2, Fig. 3, Fig. 4 and Fig. 5, wherein, first output has contact DRA; Export in the input of Fig. 3 and Fig. 4, second input has contact DRB, in like manner exports in the input of Fig. 3 and Fig. 4; The signal of contact DRA output first frequency; Contact DRB output second frequency signal, Fig. 3 output contact DRC exports the signal of the 3rd frequency, and Fig. 4 output contact DRD exports the signal of the 4th frequency.

Wherein, resistance R 8, R9, R10, R11, R17, R18, R19, R20 value can be 2K.

The contact of the DRCT of the DRCT map interlinking 1 of Fig. 5.

This circuit is a core with chip SG3525; Cooperate comparator LM339 and corresponding element to realize phase shifting control; Be that the comparator model of code name is LM339 with 324 among the figure, SG3525 and accessory circuit have been formed high-precision vibration and drive circuit, and wherein 5 pin of SG3525 are external timing capacitor end; Its waveform is the 0.7---3.3VP-P sawtooth waveforms; The design's purport also is to utilize this sawtooth waveforms, compares with POWER-hi (phase shift controlling voltage signal), finally realizes the phase whole-bridging circuit that the phase angle is controlled.

A kind of ultrasonic power of the utility model is characterised in that:

1.DRCT be the triangular signal network name, obtain two groups of signal RST and STOP through comparator;

When RST and DRA be high simultaneously or STOP and DRB simultaneously when high, DRC is a height;

When RST be with DRB simultaneously for high or STOP and DRA simultaneously when high, DRD is a height;

4.DRA be upper left half-bridge; DRB is a left side half-bridge down; DRC is upper right half-bridge; DRD is the bottom right half-bridge;

Thereby realized that accurate phase-shifting full-bridge drives.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.

Claims

1. ultrasonic power; Comprise that being used for producing initial first frequency signal from first output reaches from the pulse width modulation circuit unit of the second frequency signal of second output generation; The phase shift controlling voltage circuit unit that links to each other with described pulse width modulation circuit unit; It is characterized in that, also comprise first anti-error code generation unit of generation the 3rd frequency signal that links to each other with described first output and the second anti-error code generation unit that is used to produce the 4th frequency signal that links to each other with described second output.

2. ultrasonic power according to claim 1; It is characterized in that; The described first anti-error code generation unit comprises first circuit unit, first comparator that links to each other with first circuit unit and the triode constant-current circuit unit that links to each other with described first comparator, and first circuit unit comprises: four resistance, four second comparators and diodes; Wherein, Each resistance and each second comparator are connected to form set of circuits, and every group of circuit is in parallel, and are input to described first comparator through described diode.

3. ultrasonic power according to claim 2; It is characterized in that; Described constant-current circuit unit comprises first triode and second triode; The base stage of first triode is connected with the output of described first comparator with the common junction that is connected of the collector electrode of second triode, and the emitter of first triode is exported the 3rd frequency signal with the common junction after the emitter of second triode is connected.

4. ultrasonic power according to claim 1; It is characterized in that; The described second anti-error code generation unit comprises the second circuit unit, the 3rd comparator that links to each other with the second circuit unit and the triode constant-current circuit unit that links to each other with described the 3rd comparator, and the second circuit unit comprises: four resistance, four the 4th comparators and diodes; Wherein, Each resistance and each the 4th comparator are connected to form set of circuits, and every group of circuit is in parallel, and are input to described the 3rd comparator through described diode.

5. ultrasonic power according to claim 4; It is characterized in that; Described constant-current circuit unit comprises the 3rd triode and the 4th triode; The base stage of the 3rd triode is connected with the output of described the 3rd comparator with the common junction that is connected of the collector electrode of the 4th triode, and the emitter of the 3rd triode is exported the 4th frequency signal with the common junction after the emitter of the 4th triode is connected.