CN213072418U

CN213072418U - Frequency-tracking pull-down circuit of ultrasonic power supply

Info

Publication number: CN213072418U
Application number: CN202021595581.5U
Authority: CN
Inventors: 李明; 曾志林; 邹显添
Original assignee: Dongguan Hengsheng Supersonic Wave Equipment Co ltd
Current assignee: Dongguan Hengsheng Supersonic Wave Equipment Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-04-27
Anticipated expiration: 2030-08-04

Abstract

The utility model relates to an ultrasonic power source chases down circuit frequently, including power control circuit, this power control circuit includes power controller, is equipped with on power controller and sends out ripples control signal end, send out to be connected with on the ripples control signal end and pursue down circuit frequently, pursue down the circuit frequently including field effect transistor and diode, field effect transistor's grid with send out ripples control signal end and be connected, field effect transistor's source electrode is connected to the drain electrode ground connection of field effect transistor on the power control circuit, is connected with the diode between field effect transistor's source electrode and drain electrode, the positive pole of diode is connected with field effect transistor's drain electrode, the negative pole of diode is connected with field effect transistor's source electrode. The utility model discloses ultrasonic power chases down the circuit frequently and is about to control frequency immediately after sending a ripples at every turn and draws down, when waiting to send a ripples next time, the frequency can be followed the low toward high and found, and the frequency that can significantly reduce like this is on the high side can not pursue the probability frequently.

Description

Frequency-tracking pull-down circuit of ultrasonic power supply

Technical Field

The utility model relates to an ultrasonic power supply, concretely relates to ultrasonic power supply chases frequency and draws low circuit.

Background

The principle of the ultrasonic power supply is that firstly, a signal generator generates a signal with a specific frequency, the signal can be a sinusoidal signal or a pulse signal, the specific frequency is the frequency of a transducer, and the ultrasonic frequency generally applied in ultrasonic equipment is 20KHz, 25KHz, 28KHz, 33KHz, 40KHz and 60 KHz; 100KHz or more has not been used in large quantities. But with the continued development of precision cleaning. It is believed that the use surface will gradually expand.

The perfect ultrasonic power supply should also have a feedback link, mainly providing feedback signals in two aspects: the first is to provide an output power signal, which is known when the power supply (voltage) of the generator changes. The output power of the generator will also change, which is reflected on the transducer as a sudden and sudden mechanical vibration, resulting in unstable cleaning effect. Therefore, the output power needs to be stabilized, and the power amplifier is adjusted correspondingly through the power feedback signal, so that the power amplification is stabilized.

In the conventional automatic frequency tracking ultrasonic power supply, due to circuit characteristics, when the operating frequency is shifted, the tracking range from high to low is narrow, and the tracking range from low to high is wide. Usually, the machine can not be warned basically after the working frequency is higher.

SUMMERY OF THE UTILITY MODEL

To the present situation of the above prior art, the technical problem to be solved in the utility model is to provide a control frequency is pulled down immediately after sending a wave at every turn, when waiting to send a wave next time, the frequency can be followed the low toward high and is looked for, and the ultrasonic power supply of the probability that can significantly reduce the frequency high just can not pursue frequently like this pulls down the circuit frequently.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides an ultrasonic power frequency tracking draws low circuit, includes the power control circuit, and this power control circuit includes the power controller, is equipped with the control signal end of sending a wave on the power controller, send a wave control signal end on be connected with frequency tracking and draw low circuit, frequency tracking draws low circuit including field effect transistor Q1001 and diode D101, and the grid and the control signal end of sending a wave of field effect transistor Q1001 are connected, and the source electrode of field effect transistor Q1001 is connected to the drain electrode ground connection of field effect transistor Q1001 on the power control circuit, is connected with diode D101 between the source electrode of field effect transistor Q1001, and the positive pole of diode D101 is connected with the drain electrode of field effect transistor Q1001, and the negative pole of diode D101 is connected with the source electrode of field effect transistor Q1001.

Preferably, the fet Q1001 is an enhancement mode in an N-channel insulated gate fet.

Preferably, the power control circuit comprises a power controller V1, resistors R91, R93, R95, a capacitor C197, a field-effect transistor Q34 and a diode D30, wherein the 2 nd pin of the power controller V1 is connected with one end of a resistor R95, the other end of the resistor R95 is connected with gates of the resistor R93 and the field-effect transistor Q34, the other end of the resistor R93 is connected with the source of the capacitor C197 and the source of the field-effect transistor Q1001, the other end of the capacitor C197 is grounded, the source of the field-effect transistor Q34 is connected with the RT end of the PWM control chip 3525, the drain of the field-effect transistor Q34 is connected with the rear ground after being connected with the resistor R91, the diode D30 is connected between the source and the drain of the field-effect transistor Q34, the positive electrode of the diode D30 is connected with the drain of the diode Q34, and the negative.

Compared with the prior art, the utility model has the advantages of: the original fixation is changed from low to high, the stability of the power supply can be improved, and the alarm probability is reduced.

Drawings

Fig. 1 is a circuit diagram of the frequency-tracking pull-down circuit of the ultrasonic power supply of the present invention;

in the figure, 1-ultrasonic power supply frequency control circuit, 2-frequency tracking pull-down circuit, 3-wave sending control signal and 4-frequency control signal.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the ultrasonic power supply frequency-following and pulling-down circuit comprises a power supply control circuit 1, the power supply control circuit comprises a power supply controller V1, a wave-sending control signal end 3 is arranged on a power supply controller V1, a frequency-following and pulling-down circuit 2 is connected to the wave-sending control signal end 3, the frequency-following and pulling-down circuit 2 comprises a field effect tube Q1001 and a diode D101, a grid electrode of the field effect tube Q1001 is connected with the wave-sending control signal end (3), a source electrode of the field effect tube Q1001 is connected to a drain electrode of the field effect tube Q1001 on the power supply control circuit 1 and is grounded, the diode D101 is connected between a source electrode and a drain electrode of the field effect tube Q1001, an anode of the diode D101 is connected with the drain electrode of the field effect tube Q1001, and a cathode of the diode D101 is connected.

As shown in fig. 1, the fet Q1001 is an enhancement mode in an N-channel insulated gate fet.

As shown in fig. 1, the power control circuit 1 includes a power controller V1, resistors R91, R93, R95, a capacitor C197, a fet Q34 and a diode D30, a 2 nd pin of the power controller V1 is connected to one end of a resistor R95, the other end of the resistor R95 is connected to gates of the resistor R93 and the fet Q34, the other end of the resistor R93 is connected to sources of the capacitor C197 and the fet Q197, the other end of the capacitor C1001 is grounded, a source of the fet Q34 is connected to an RT terminal of the PWM control chip 3525, a drain of the fet Q34 is connected to a ground after being connected to a resistor R91, a diode D30 is connected between a source and a drain of the fet Q34, an anode of the diode D30 is connected to a drain of the fet Q34, and a cathode of the diode D30 is connected to a source of the fet Q34.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The frequency-chasing and lowering circuit of the ultrasonic power supply comprises a power supply control circuit (1), wherein the power supply control circuit comprises a power supply controller V1, a wave-sending control signal end (3) is arranged on a power supply controller V1, and is characterized in that the frequency-chasing and lowering circuit (2) is connected to the wave-sending control signal end (3), the frequency-chasing and lowering circuit (2) comprises a field effect tube Q1001 and a diode D101, the grid electrode of the field effect tube Q1001 is connected with the wave-sending control signal end (3), the source electrode of the field effect tube Q1001 is connected to the power supply control circuit (1), the drain electrode of the field effect tube Q1001 is grounded, the diode D101 is connected between the source electrode and the drain electrode of the field effect tube Q1001, the anode of the diode D101 is connected with the drain electrode of the field effect tube Q1001, and the cathode of the diode D101 is connected with the source electrode.

2. The ultrasonic power frequency follow-up pull-down circuit according to claim 1, wherein the fet Q1001 is an enhancement mode in an N-channel insulated gate fet.

3. The ultrasonic power supply frequency-chasing and pulling-down circuit as claimed in claim 1 or 2, wherein the power supply control circuit (1) comprises a power supply controller V1, resistors R91, R93 and R95, a capacitor C197, a field effect transistor Q34 and a diode D30, the 2 nd pin of the power supply controller V1 is connected with one end of a resistor R95, the other end of the resistor R95 is respectively connected with the gates of a resistor R93 and a field effect transistor Q34, the other end of the resistor R93 is connected with the sources of the capacitor C197 and the field effect transistor Q1001, the other end of the capacitor C197 is grounded, the source of the field effect transistor Q34 is connected with the RT end of the PWM control chip 3525, the drain of the field effect transistor Q34 is connected with the rear ground after being connected with the resistor R91, a diode D30 is connected between the source and the drain of the field effect transistor Q34, the anode of the diode D30 is connected with the source of the field effect transistor Q34, and the cathode of the.