Tuning circuit for ultrasonic welding generator

Abstract

The utility model discloses a tuning circuit for an ultrasonic welding generator. The tuning circuit comprises a controller, a driving circuit, a gear motor, an adjustable inductor, a power driving circuit, an inversion and matching circuit and a current detection sensor, a screw rod is additionally arranged on a magnetic core of the adjustable inductor, and the screw rod is connected with the speed reducing motor; the current detection sensor and the driving circuit are respectively connected with the controller, the driving circuit is also respectively connected with the gear motor, and the gear motor drives the screw rod to rotate so as to drive the value of the adjustable inductor to change, so that tuning is realized; the adjustable inductor is further connected with the power drive circuit and the inversion and matching circuit, and the inversion and matching circuit is further connected with a transducer of the ultrasonic welding generator. The method has the advantages that the defects that the current tuning process is complex, and operators are required to have rich experience in the tuning process are overcome, and then the tuning difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic circuit technical field, concretely relates to a tuning circuit for ultrasonic welding generator. BACKGROUND

[0002] At present, the analog ultrasonic welding generator on the market mainly adopts manual adjustment tuning inductance, makes the whole tuning process more complicated, requires the operating personnel to have rich experience in the tuning process, and improper tuning can easily cause mold damage. INVENTION CONTENTS

[0003] In view of the defects in the prior art, the utility model aims at providing a tuning circuit for ultrasonic welding generator to solve the technical problems proposed in the background art.

[0004] The utility model takes the technical scheme as: a tuning circuit for ultrasonic welding generator, the tuning circuit includes controller, drive circuit, speed reducer, adjustable inductance, power drive circuit, inverter and matching circuit and current detection sensor for detecting load current and power tube's reverse current, wherein the magnetic core of adjustable inductance is additionally provided with screw rod, the screw rod is connected with speed reducer,

[0005] The current detection sensor and drive circuit are connected with controller respectively, the drive circuit is also connected with speed reducer respectively, the screw rod is driven to rotate by speed reducer, and the value of adjustable inductance changes, and tuning is realized, the adjustable inductance is also connected with power drive circuit and inverter and matching circuit respectively, and the inverter and matching circuit are also connected with the transducer of ultrasonic welding generator.

[0006] Preferably, the tuning circuit further includes a display module for displaying current value, and the display module is connected with the controller through a serial port.

[0007] Preferably, the tuning circuit further includes a protection switch connected with the controller.

[0008] Preferably, the protection switch is a stroke protection switch.

[0009] Preferably, the speed reducer is a motor, and the drive circuit is a triode drive circuit.

[0010] Preferably, the current detection sensor is a Hall current detection sensor.

[0011] Preferably, the output end of the current detection sensor is connected with the controller through an amplifier.

[0012] Preferably, the controller is a single-chip microcomputer.

[0013] The utility model discloses the beneficial effect reflects: through installing screw rod on the magnetic core of existing tuning inductance, when the ultrasonic welding generator starts ultrasonic, singlechip control deceleration motor drives screw rod rotation, drives the value of tuning inductance to change, thereby realizes tuning, overcomes the current tuning process is more complicated, the defect that the operator needs to have rich experience in tuning process, and further reduces the tuning difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will be briefly introduced in the specific embodiment or prior art description The drawings needed to be used in the description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual proportion.

[0015] Figure 1 The principle block diagram of a tuning circuit for ultrasonic welding generator provided by the utility model embodiment;

[0016] Figure 2 The connection schematic diagram of a controller provided by the utility model embodiment;

[0017] Figure 3 The connection schematic diagram of a current detection sensor provided by the utility model embodiment;

[0018] Figure 4 The connection schematic diagram of a drive circuit provided by the utility model embodiment;

[0019] Figure 5 The connection schematic diagram of a protection switch provided by the utility model embodiment. DETAILED DESCRIPTION

[0020] The embodiments of the technical scheme of the application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the application, therefore only as an example, and cannot limit the protection scope of the application.

[0021] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the skilled person in the field of the application.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs.

[0026] As shown in Figures 1 to 5 The tuning circuit for the ultrasonic welding generator provided by the embodiment of the present application comprises a controller, a drive circuit, a speed reducer, an adjustable inductor, a power drive circuit, an inverter and matching circuit and a current detection sensor for detecting load current and power tube reverse current; wherein a screw rod is installed on the magnetic core of the adjustable inductor, and the screw rod is connected with the speed reducer;

[0027] The current detection sensor and the drive circuit are connected with the controller respectively, the drive circuit is also connected with the speed reducer respectively, the value of the adjustable inductor is changed by rotating the screw rod driven by the speed reducer, so as to realize tuning; the adjustable inductor is also connected with the power drive circuit and the inverter and matching circuit respectively, and the inverter and matching circuit is also connected with the transducer of the ultrasonic welding generator.

[0028] It should be noted that the power drive circuit and the inverter and matching circuit are mature applications of the prior art, and those skilled in the art should be familiar with them, and they will not be described here; the power drive circuit includes a power tube, and the load is the transducer of the ultrasonic welding generator;

[0029] And also includes the power module and the like which is well known to those skilled in the art.

[0030] When applied, the transducer of the ultrasonic welding generator is used as a load, and the meaning of the ultrasonic welding transducer in the drawing is the same.

[0031] In order to intuitively reflect the current value corresponding to different inductances, the tuning circuit further comprises a display module for displaying the current value, and the display module is connected with the controller through a serial port.

[0032] In the embodiment, the adjustable inductance has the same meaning as the existing tuning inductance; the controller uses a single-chip microcomputer, has multiple interfaces, and provides powerful computing and data processing capabilities; the display module uses a touch screen and is configured with a one-key debugging button to realize one-key control of the single-chip microcomputer on the panel; the above is only an example and is not a limitation.

[0033] The current detection sensor uses a Hall current detection sensor, and the output end of the current detection sensor is connected with the controller through an amplifier.

[0034] The Hall current detection sensor is denoted by HER1 in Figure 3 , and the amplifier is denoted by U2A; for a more specific structure, please refer to the attached Figure 3 .

[0035] Referring to Figure 4 , the reduction motor uses a motor, and the drive circuit uses a triode drive circuit; the drive signal output by the controller is M0 in Figure 4 .

[0036] The principle of the utility model is that when the ultrasonic welding generator starts ultrasonic, the single-chip microcomputer controls the rotation of the reduction motor, drives the value of the tuning inductance to change, and at the same time, the current detection sensor on the hardware circuit sends the detected load current and the reverse current value on the power tube to the single-chip microcomputer for detection and judgment; when the minimum current is detected, the single-chip microcomputer judges that the tuning is completed, at this time, the reduction motor is locked and stopped, and the inductance parameter at this time is used as the best tuning inductance to work.

[0037] The scheme adds a screw rod on the magnetic core of the existing tuning inductor, and when the ultrasonic welding generator starts ultrasonic, the single-chip microcomputer controls the reduction motor to drive the screw rod to rotate, and drives the value of the tuning inductor to change, so as to realize tuning.

[0038] Further, on the basis of the above technical scheme, in order to improve the security of application, the tuning circuit further comprises a protection switch connected with the controller.

[0039] In the embodiment, the protection switch is a stroke protection switch, and the number thereof is two, one of which represents the maximum stroke, Figure 5 denoted by M MAX; and the other represents the minimum stroke, Figure 5 denoted by M MIN.

[0040] In the implementation, the M MAX and M MIN represent the stroke protection switch of the motor, and protect the displacement stroke of the motor within a certain range.

[0041] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model, and they should be covered in the scope of the claims and the specification of the utility model.

Claims

1. A tuning circuit for an ultrasonic welding generator, characterized in that... The tuning circuit includes a controller, a drive circuit, a geared motor, an adjustable inductor, a power drive circuit, an inverter and matching circuit, and a current detection sensor for detecting the load current and the reverse current of the power transistor; wherein, a screw is mounted on the magnetic core of the adjustable inductor, and the screw is connected to the geared motor; The current detection sensor and the drive circuit are respectively connected to the controller. The drive circuit is also connected to the geared motor. The geared motor drives the screw to rotate, which in turn changes the value of the adjustable inductor, thereby achieving tuning. The adjustable inductor is also connected to the power drive circuit and the inverter and matching circuit. The inverter and matching circuit is also connected to the transducer of the ultrasonic welding generator.

2. The tuning circuit for an ultrasonic welding generator according to claim 1, characterized in that... The tuning circuit also includes a display module for displaying current values, which is connected to the controller via a serial port.

3. A tuning circuit for an ultrasonic welding generator according to claim 1 or 2, characterized in that... The tuning circuit also includes a protection switch connected to the controller.

4. A tuning circuit for an ultrasonic welding generator according to claim 3, characterized in that... The protection switch is a limit protection switch.

5. A tuning circuit for an ultrasonic welding generator according to claim 4, characterized in that... The geared motor is a motor, and the drive circuit is a transistor drive circuit.

6. A tuning circuit for an ultrasonic welding generator according to claim 5, characterized in that... The current detection sensor is a Hall current detection sensor.

7. A tuning circuit for an ultrasonic welding generator according to claim 6, characterized in that... The output of the current detection sensor is connected to the controller via an amplifier.

8. A tuning circuit for an ultrasonic welding generator according to claim 7, characterized in that... The controller is a single-chip microcomputer.

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