CN114378420A - Ultrasonic wave generating system and ultrasonic welding machine - Google Patents
Ultrasonic wave generating system and ultrasonic welding machine Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B3/02—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency involving a change of amplitude
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/72—Welding, joining, soldering
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Abstract
The application provides an ultrasonic wave generating system and an ultrasonic welding machine, and relates to the technical field of ultrasonic waves. The ultrasonic generating system comprises a controller unit, a phase-shifted full-bridge unit, a tuning unit and a positive feedback unit; the controller unit is connected with the phase-shifted full-bridge unit in an isolated mode and used for sending a control signal to the driving end of the phase-shifted full-bridge unit; the phase-shifted full-bridge unit is used for converting an input voltage into an adjustable output voltage; the input end of the tuning unit is connected with the output end of the phase-shifted full-bridge unit and is used for adjusting the amplitude of the output voltage; and the input end of the positive feedback unit is connected with the output end of the tuning unit, and the output end of the positive feedback unit is connected with the phase-shifted full-bridge unit and used for compensating the input voltage to obtain the output voltage with the same amplitude. By adopting the ultrasonic generating system provided by the application, the output power linear regulation precision and the welding quality can be improved.
Description
Technical Field
The application relates to the technical field of ultrasonic waves, in particular to an ultrasonic wave generation system and an ultrasonic welding machine.
Background
At present, the welding technology is very commonly applied in the fields of aerospace, bridge shipbuilding, pressure vessels, metal structures and the like, and the requirements on the welding quality and the welding efficiency are higher and higher along with the continuous progress of the modern technology.
With the development and progress of science and technology, welding methods are also continuously improved, and in order to improve the welding quality and the welding efficiency, various composite welding methods have been designed, and ultrasonic welding is one of the methods. Ultrasonic welding is performed by transmitting a high-frequency vibration wave to the surfaces of two objects to be welded, and rubbing the surfaces of the two objects against each other under pressure to form a fusion between the molecular layers. However, the welding quality and the welding precision of the existing ultrasonic welding are generally not high, and the ultrasonic generating system has the problems of low output power linear regulation precision and low welding quality.
Disclosure of Invention
An object of the embodiment of the application is to provide an ultrasonic wave generating system and an ultrasonic welding machine, which are used for solving the problems of low output power linear regulation precision and low welding quality of the ultrasonic wave generating system. Mainly comprises the following aspects:
in a first aspect, the present application provides an ultrasound generation system, the system comprising: the device comprises a controller unit, a phase-shifted full-bridge unit, a tuning unit and a positive feedback unit;
the controller unit is connected with the phase-shifted full-bridge unit in an isolated mode and used for sending a control signal to the driving end of the phase-shifted full-bridge unit;
the phase-shifted full-bridge unit is used for converting an input voltage into an adjustable output voltage;
the input end of the tuning unit is connected with the output end of the phase-shifted full-bridge unit and is used for adjusting the amplitude of the output voltage; and
the input end of the positive feedback unit is connected with the output end of the tuning unit, and the output end of the positive feedback unit is connected with the phase-shifted full-bridge unit and used for compensating the input voltage to obtain the output voltage with the same amplitude.
The ultrasonic wave generation system provided by the embodiment of the application adjusts the input voltage through the phase-shifted full-bridge unit, adjusts the amplitude of the output voltage through the tuning unit, and compensates the input voltage through the positive feedback unit to obtain the output voltage with the same amplitude. The output power linear adjustment precision of the ultrasonic wave generation system is high, the welding quality is improved, and the influence of the welding pressure on the amplitude of the ultrasonic wave generation system is reduced.
In some optional implementations, the positive feedback unit includes: the rectifier module, the filter module and the first diode;
the input end of the rectifying module is connected with the output end of the tuning unit, the first output end of the rectifying module is connected with the filtering module, the second output end of the rectifying module is connected with the first diode, and the first diode is connected with the phase-shifted full-bridge unit;
the rectifying module is used for feeding back the voltage change of the output voltage to the phase-shifted full-bridge unit.
In the implementation manner, the positive feedback unit feeds back the output voltage at the tuning unit to the phase-shifted full-bridge unit, the input voltage of the phase-shifted full-bridge unit is increased, the output voltage of the phase-shifted full-bridge unit is also increased, so as to compensate the voltage reduction caused by the welding process, and output the output voltage with the same amplitude.
In some optional implementations, the system further comprises: an energy discharge unit;
the energy discharge unit is connected with the tuning unit and used for discharging residual energy in the system after the system stops working; wherein the residual energy in the system comprises energy in a capacitor and an inductor in the system after the system stops working.
In the above implementation manner, the energy discharge unit is used for discharging residual energy in the capacitor and the inductor in the system after the system stops working, so as to avoid the residual energy in the capacitor and the inductor from damaging elements in the system.
In some optional implementations, the energy discharge unit includes: the switch, the second diode and the bleeder resistor;
the switch is connected with the second diode in parallel and then connected with the bleeder resistor in series, wherein the switch is opened when the system stops working, and the residual energy is discharged to the ground terminal through the switch and the bleeder resistor.
In some optional implementations, the capacitance and the inductance are located in a positive feedback unit, a phase-shifted full bridge unit, a tuning unit, and a power factor correction unit in the system.
In the implementation mode, when the system stops working, residual energy in capacitors and inductors in the positive feedback unit, the phase-shifted full-bridge unit, the tuning unit and the power factor correction unit is discharged to the ground terminal through switches and discharge resistors, so that the residual energy in the capacitors and the inductors is prevented from damaging elements in the system.
In some optional implementations, the system further comprises: an impedance conversion unit;
the input end of the impedance transformation unit is connected with the phase-shifted full-bridge unit, and the output end of the impedance transformation unit is connected with the tuning unit and used for adjusting the impedance of the system.
In the implementation manner, the impedance conversion unit can adjust the impedance of the ultrasonic wave generation system to be equivalent impedance equal to the internal impedance of the power supply, and can improve the energy transmission efficiency of the ultrasonic wave generation system. Meanwhile, input and output electrical isolation is realized, and the electricity utilization safety of the ultrasonic wave generation system is ensured.
In some optional implementations, the system further comprises: a power factor correction unit;
and the power factor correction unit is connected with the phase-shifted full-bridge unit and is used for compensating the reactive power of the system.
In the implementation mode, the power factor correction unit can reduce harmonic current pollution in a power grid, can compensate reactive power and reduce the influence of power grid fluctuation on the ultrasonic wave generation system.
In some optional implementations, the system further comprises: a sampling unit;
the sampling unit comprises a voltage sampling module and a current sampling module;
the voltage sampling module is used for collecting the voltage in the system and transmitting the voltage to the controller unit;
the current sampling module is used for collecting current in a system and transmitting the current to the controller unit.
In the implementation mode, the voltage sampling module and the current sampling module can respectively collect the voltage and the current in the system and transmit the voltage and the current to the controller unit, so that the controller unit can monitor the ultrasonic wave generation system, and the stability of the system is improved.
In some optional implementations, the system further comprises: a current overcurrent protection unit;
the current overcurrent protection unit is connected with the output end of the system and used for collecting the current value of the output end of the system.
In the implementation mode, the current overcurrent protection unit acquires the current value of the output end of the system, compares the current value with the set protection value, and executes overcurrent protection action when the current value exceeds the set protection value, so that the safety of the ultrasonic wave generation system and the load under abnormal conditions is ensured.
In a second aspect, an embodiment of the present application provides an ultrasonic welding machine, including: a welding kit and an ultrasonic generation system;
the welding kit is connected with the ultrasonic generating system and driven by the ultrasonic generating system to perform welding.
The ultrasonic welding machine comprises a welding kit and an ultrasonic generation system, wherein the ultrasonic generation system adjusts input voltage through a phase-shifted full-bridge unit, adjusts the amplitude of output voltage through a tuning unit, and compensates the input voltage through a positive feedback unit to obtain the output voltage with the same amplitude. The output power linear adjustment precision of the ultrasonic welding machine is high, the welding quality is improved, and the influence of the welding pressure on the amplitude of the ultrasonic generation system is reduced.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an ultrasonic wave generation system provided in an embodiment of the present application;
FIG. 2 is a specific circuit diagram of an ultrasound generation system provided in an embodiment of the present application;
FIG. 3 is a schematic view of a first structure of an ultrasonic generating system according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a second configuration of an ultrasound generation system according to an embodiment of the present disclosure; and
FIG. 5 is a schematic structural diagram of an ultrasonic welding machine according to an embodiment of the present application.
Icon: 100-an ultrasonic generating system; 102-an ultrasound generating system; 110-a controller unit; 120-phase-shifted full-bridge cell; 130-a tuning unit; 140-a positive feedback unit; 141-a rectifying module; 142-a filtering module; 143-a first diode; 150-an energy discharge unit; 151-switch; 152-a second diode; 153-bleeder resistance; 160-an impedance transformation unit; 170-power factor correction unit; 180-a sampling unit; 181-voltage sampling module; 182-a current sampling module; 190-a current overcurrent protection unit; 200-ultrasonic welding machine; 210-welding the assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
The applicant found in the course of the study: the existing ultrasonic wave generation system has some technical problems to be solved, such as the problems that the output power linearity adjustment degree of the ultrasonic wave generation system is low and the consistency of welding quality is difficult to control, the problems that a plurality of high-power ultrasonic welding machine devices on the same power supply bus have large impact on a power grid and the power quality of the power grid is reduced when the plurality of high-power ultrasonic welding machine devices work simultaneously, and the problems that residual energy flows backwards after the ultrasonic wave generation system stops working and damages the ultrasonic wave generation system and an ultrasonic wave vibration system.
Based on this, the embodiment of the present application provides an ultrasonic wave generation system, which includes a controller unit, a phase-shifted full-bridge unit, a tuning unit, and a positive feedback unit. The controller unit controls the phase-shifted full-bridge unit to adjust input voltage, the tuning unit is used for adjusting amplitude of output voltage, and the positive feedback unit compensates the input voltage to obtain the output voltage with the same amplitude. The ultrasonic generating system can improve the linear adjustment degree of output power and compensate the reduction of the amplitude brought by welding pressure. The ultrasound generation system provided by the present application is described below by way of several embodiments.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an ultrasonic generating system provided in the embodiment of the present application, and fig. 2 is a specific circuit diagram of the ultrasonic generating system provided in the embodiment of the present application. The ultrasound generation system 100 may include: a controller unit 110, a phase-shifted full-bridge unit 120, a tuning unit 130 and a positive feedback unit 140.
The controller unit 110 is connected to the phase-shifted full-bridge unit 120 in an isolated manner, and is configured to send a control signal to a driving end of the phase-shifted full-bridge unit 120;
illustratively, the controller unit 110 may be an integrated circuit chip having signal processing capabilities. The controller Unit 110 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The functions of variable calculation, logic judgment, signal arrangement, conversion acquisition and the like can be realized. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Therein, the phase-shifted full-bridge cell 120 is used to convert an input voltage into an adjustable output voltage.
Illustratively, the phase-shifted full-bridge unit 120 may be a full-bridge structure, and the phase-shifted full-bridge unit 120 may be 4 sets of circuits composed of a main switch tube, a capacitor and a diode, which are all connected in parallel. The main considerations for selecting the main switching tube are power level and switching frequency, and in one example, the main switching tube may be a MOSFET or an IGBT. The diode is connected between the collector and the emitter of the main switching tube to prevent the main switching tube from bearing excessive reverse voltage. The capacitor is a resonance capacitor and provides a zero-voltage switching condition for the main switching tube.
Illustratively, the driving end of the phase-shifted full-bridge unit 120 receives a control signal of the controller unit 110, wherein the control signal may be a PWM signal. The phase-shifted full-bridge unit 120 adjusts the turn-on overlap time between different main switching tubes based on the PWM signal, thereby controlling the amplitude of the output voltage.
The input terminal of the tuning unit 130 is connected to the output terminal of the phase-shifted full-bridge unit 120, and is used for adjusting the amplitude of the output voltage.
Exemplarily, the tuning unit 130 may include a resonance transformer and a plurality of capacitors, wherein the plurality of capacitors are connected in series. The tuning unit 130 may filter out high frequency components in the square wave output by the phase-shifted full-bridge unit 120 to obtain a fundamental wave sinusoidal signal of the ultrasonic frequency. The tuning unit 130 may also resonate when the loop frequency reaches a certain value, thereby achieving a maximum amplitude of the output voltage.
The input end of the positive feedback unit 140 is connected to the output end of the tuning unit 130, and the output end of the positive feedback unit 140 is connected to the phase-shifted full-bridge unit 120, so as to compensate the input voltage to obtain the output voltage with the same amplitude.
Illustratively, the positive feedback unit 140 feeds back the output voltage at the tuning unit 130 to the phase-shifted full-bridge unit 120, and the input voltage of the phase-shifted full-bridge unit 120 increases and the output voltage thereof also increases to compensate for the voltage reduction caused by the welding process and output the output voltage with the same amplitude.
Alternatively, the positive feedback unit 140 may include: a rectifying module 141, a filtering module 142 and a first diode 143.
The input end of the rectifying module 141 is connected to the output end of the tuning unit 130, the first output end of the rectifying module 141 is connected to the filtering module 142, the second output end of the rectifying module 141 is connected to the first diode 143, and the first diode 143 is connected to the phase-shifted full-bridge unit 120. The rectifying module 141 is used for feeding back the voltage variation of the output voltage to the phase-shifted full-bridge unit 120.
Illustratively, the rectifying module 141 may be a bridge rectifying circuit composed of four diodes, wherein a connection point of anodes of the two diodes is a cathode of the output terminal of the rectifying module 141, and a connection point of cathodes of the two diodes is an anode of the output terminal of the rectifying module 141. The rectifying module 141 may rectify the ac power output from the tuning unit 130 into dc power, and superimpose the dc power on the input end of the phase-shifted full-bridge unit 120 through the first diode 143.
Illustratively, when the welding pressure increases, the equivalent impedance of the ultrasonic wave generating system 100 increases, the voltage of the primary side of the resonant transformer in the tuning unit 130 increases, the secondary side of the resonant transformer also senses the high voltage, the sensed high voltage is rectified by the rectifying module 141 and then superimposed on the input end of the phase-shifted full-bridge unit 120 through the first diode 143, and the voltage of the output end of the phase-shifted full-bridge unit 120 also increases, thereby forming a positive feedback to increase the output voltage at this time.
Illustratively, the filtering module 142 may include a capacitor and a resistor, wherein the capacitor and the resistor are connected in parallel. The ac signal or the high frequency signal in the output terminal voltage of the rectifying module 141 may be filtered.
As shown in fig. 3, fig. 3 is a first schematic structural diagram of an ultrasonic wave generating system according to an embodiment of the present application.
Optionally, the ultrasound generation system 102 may further include an energy discharge unit 150.
The energy discharge unit 150 is connected to the tuning unit 130, and is configured to discharge remaining energy in the system after the system stops operating, where the remaining energy in the system includes energy in a capacitor and an inductor in the system after the system stops operating.
Illustratively, when the ultrasound generation system 102 is in operation, the capacitance and inductance in the system will store energy. After the ultrasound generation system 102 stops operating, its stored energy is discharged to ground through the energy discharge unit 150. The energy discharge unit 150 may be a normally closed relay connected in series with an energy absorbing resistor, wherein when the relay is closed, the energy of the energy storage capacitor passes through the resistor and the relay, and when the relay is open, the energy discharge is stopped.
Optionally, the energy discharge unit 150 comprises: switch 151, second diode 152, and bleed resistor 153.
The switch 151 and the second diode 152 are connected in parallel and then connected in series with the bleeder resistor 153, the switch 151 is turned on when the system stops working, and the residual energy is bled to the ground terminal through the switch 151 and the bleeder resistor 153.
Illustratively, the switch 151 may be a semiconductor device such as an IGBT, a MOSFET, a triode, or a thyristor, and since the delay time of the semiconductor switching device is very small and the electromagnetic interference is small, the energy discharge and stop will not cause the problems of delay time and serious electromagnetic interference due to the on or off of the semiconductor switching device. The switch 151 may be a semi-controlled semiconductor device to implement a fast turn-on function. The switch 151 may also be a fully-controlled semiconductor device, which not only can realize fast turn-on, but also can realize fast turn-off, and the fully-controlled semiconductor device has strong anti-interference capability.
For example, when the system stops working, the controller unit 110 may control the switch 151 to open, and the residual energy in the capacitor and the inductor is discharged to the ground terminal through the switch 151 and the discharging resistor 153.
Illustratively, a second diode 152 is connected in anti-parallel across the switch 151, which functions as a freewheeling preventing high voltage breakdown of the switch 151.
Optionally, the capacitance and inductance are located in the positive feedback unit 140, the phase-shifted full bridge unit 120, the tuning unit 130, and the power factor correction unit 170 in the system.
Illustratively, the capacitors and inductors in the positive feedback unit 140, the phase-shifted full bridge unit 120, the tuning unit 130, and the power factor correction unit 170 store energy when the ultrasound generation system 102 is operating, and the stored energy is discharged to the ground through the energy discharge unit 150 to avoid damaging the components in the system.
Fig. 4 is a schematic view of a second structure of an ultrasonic wave generating system according to an embodiment of the present application, as shown in fig. 4.
Optionally, the ultrasound generating system 100 may further include an impedance transformation unit 160.
The input end of the impedance transformation unit 160 is connected to the phase-shifted full-bridge unit 120, and the output end of the impedance transformation unit 160 is connected to the tuning unit 130, so as to adjust the impedance of the system.
For example, the impedance transforming unit 160 may include a transformer, and the impedance transforming unit 160 may adjust the impedance of the system, wherein the ratio of the primary impedance to the secondary impedance of the transformer is equal to the square of the ratio of the number of primary turns to the number of secondary turns. The impedance transformation unit 160 may adjust the impedance of the system to an equivalent impedance equal to the ultrasound power source to improve the energy transmission efficiency of the ultrasound generation system 100.
Meanwhile, the transformer also realizes the electrical isolation of the input and the output of the ultrasonic wave generation system 100, and can ensure the electricity utilization safety of the ultrasonic wave generation system 100.
Optionally, the ultrasound generation system 100 may further include a rectifying and filtering module. The rectification filter module is connected with an external alternating current power supply and used for rectifying alternating current of the external alternating current power supply into direct current.
Optionally, the ultrasound generation system 100 may further include a power factor correction unit 170.
The power factor correction unit 170 is connected to the phase-shifted full-bridge unit 120, and is configured to compensate for the reactive power of the system.
For example, the power factor correction unit 170 may be an active power factor correction unit, or a passive power factor correction unit, and in this application, an active power factor correction unit is adopted, and the power factor correction unit 170 may improve the utility of the ultrasonic wave generation system 100 to the mains power and reduce the power loss in the conversion process.
For example, the pfc unit 170 may include an inductor, a capacitor, and an electronic component, and the controller unit 110 controls a driving terminal of the electronic component to adjust a waveform of a current to compensate for a phase difference between circuit voltages.
Illustratively, the power factor correction unit 170 may be connected to a rectifying and filtering module, and the direct current passing through the rectifying and filtering module has current harmonics, which are non-linear and may reduce the power factor of the external ac power source.
Optionally, the ultrasound generating system 100 may further include a sampling unit 180. The sampling unit 180 may include a voltage sampling module 181 and a current sampling module 182.
The voltage sampling module 181 is configured to collect a voltage in the system and transmit the voltage to the controller unit 110; the current sampling module 182 is used to collect the current in the system and transmit the current to the controller unit 110.
Illustratively, the output feedback of the ultrasound generating system 100 can be hardware controlled by the controller unit 110, the phase-shifted full-bridge unit 120, and the sampling unit 180.
Illustratively, the ultrasound generating system 100 includes a plurality of current sampling modules 182, the current sampling modules 182 may acquire current signals at the phase-shifted full-bridge unit 120 in the system, the current sampling modules 182 may also acquire current signals at the output end of the system, and send the current signals to an analog-to-digital conversion module of the controller unit 110, the controller unit 110 may obtain a correction amount of the current signals by using an incremental algorithm, obtain a phase shift angle between different main switching tubes based on the correction amount, perform 4-way PWM distribution, and output a control signal to the driving end of the phase-shifted full-bridge unit 120.
For example, the ultrasonic wave generating system may include a plurality of voltage sampling modules 181, the voltage sampling modules 181 may collect voltage signals at the output end of the phase-shifted full-bridge unit 120, the voltage sampling modules 181 may also collect voltage signals at the output end of the system, and send the voltage signals to an analog-to-digital conversion module of the controller unit 110, and the controller unit 110 may adjust the delay time of the PWM signal based on the voltage signals, generate phase-shifted signals, and output control signals to the driving end of the phase-shifted full-bridge unit 120.
For example, the voltage sampling module 181 may also collect voltage signals of other places of the ultrasound generating system, such as an input voltage, and a voltage on a bus, and transmit the voltage signals to the controller unit 110, so that the controller unit can monitor the ultrasound generating system 100, and improve the stability of the system.
Optionally, the ultrasonic wave generation system 100 may further include a current overcurrent protection unit 190.
The current overcurrent protection unit 190 is connected to the output end of the system, and is configured to collect a current value at the output end of the system.
For example, the input end of the current over-current protection unit 190 may be connected to the current sampling module 182 at the output end of the phase-shifted full-bridge unit 120, the current sampling module 182 converts the current signal therein into a voltage signal, the current over-current protection unit 190 compares the voltage signal with a set protection value, and when the voltage signal exceeds the set protection value, an over-current protection action is issued, so as to ensure the safety of the power supply and the load under abnormal conditions.
For example, the input end of the current overcurrent protection unit 190 may also be connected to the current sampling module 182 of the output end of the ultrasonic wave generation system 100, the current sampling module 182 converts the current signal therein into a voltage signal, the current overcurrent protection unit 190 compares the voltage signal with a set protection value, and when the voltage signal exceeds the set protection value, the current overcurrent protection unit 190 issues an overcurrent protection action, thereby ensuring the safety of the power supply and the load under abnormal conditions.
The embodiment of the present application also discloses an ultrasonic welding machine 200, as shown in fig. 5, fig. 5 is a schematic structural diagram of the ultrasonic welding machine provided in the embodiment of the present application. The ultrasonic welder 200 includes a welding kit 210 and an ultrasonic generating system 100.
The welding kit 210 is connected to the ultrasonic generation system 100 and driven by the ultrasonic generation system 100 to perform welding.
Illustratively, the ultrasonic wave generating system 100 in the ultrasonic welding machine 200 adjusts the input voltage by the phase-shifted full-bridge unit 120, adjusts the amplitude of the output voltage by the tuning unit 130, and compensates the input voltage by the positive feedback unit 140 to obtain the output voltage of the same amplitude. Therefore, the ultrasonic welding machine 200 controls the welding kit 210 to weld through the output voltages with the same amplitude, so that the output power of the ultrasonic welding machine 200 is linearly adjusted with high precision and welding quality.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An ultrasound generation system, comprising: the device comprises a controller unit, a phase-shifted full-bridge unit, a tuning unit and a positive feedback unit;
the controller unit is connected with the phase-shifted full-bridge unit in an isolated mode and used for sending a control signal to the driving end of the phase-shifted full-bridge unit;
the phase-shifted full-bridge unit is used for converting an input voltage into an adjustable output voltage;
the input end of the tuning unit is connected with the output end of the phase-shifted full-bridge unit and is used for adjusting the amplitude of the output voltage; and
the input end of the positive feedback unit is connected with the output end of the tuning unit, and the output end of the positive feedback unit is connected with the phase-shifted full-bridge unit and used for compensating the input voltage to obtain the output voltage with the same amplitude.
2. The system of claim 1, wherein the positive feedback unit comprises: the rectifier module, the filter module and the first diode;
the input end of the rectifying module is connected with the output end of the tuning unit, the first output end of the rectifying module is connected with the filtering module, the second output end of the rectifying module is connected with the first diode, and the first diode is connected with the phase-shifted full-bridge unit;
the rectifying module is used for feeding back the voltage change of the output voltage to the phase-shifted full-bridge unit.
3. The system of claim 1, further comprising: an energy discharge unit;
the energy discharge unit is connected with the tuning unit and used for discharging residual energy in the system after the system stops working; wherein the residual energy in the system comprises energy in a capacitor and an inductor in the system after the system stops working.
4. The system of claim 3, wherein the energy discharge unit comprises: the switch, the second diode and the bleeder resistor;
the switch is connected with the second diode in parallel and then connected with the bleeder resistor in series, wherein the switch is opened when the system stops working, and the residual energy is discharged to the ground terminal through the switch and the bleeder resistor.
5. The system of claim 3, wherein the capacitance and inductance are located in a positive feedback unit, a phase-shifted full bridge unit, a tuning unit, and a power factor correction unit in the system.
6. The system of claim 1, further comprising: an impedance conversion unit;
the input end of the impedance transformation unit is connected with the phase-shifted full-bridge unit, and the output end of the impedance transformation unit is connected with the tuning unit and used for adjusting the impedance of the system.
7. The system of claim 1, further comprising: a power factor correction unit;
and the power factor correction unit is connected with the phase-shifted full-bridge unit and is used for compensating the reactive power of the system.
8. The system of claim 1, further comprising: a sampling unit;
the sampling unit comprises a voltage sampling module and a current sampling module;
the voltage sampling module is used for collecting the voltage in the system and transmitting the voltage to the controller unit;
the current sampling module is used for collecting current in a system and transmitting the current to the controller unit.
9. The system of claim 1, further comprising: a current overcurrent protection unit;
the current overcurrent protection unit is connected with the output end of the system and used for collecting the current value of the output end of the system.
10. An ultrasonic welding machine, comprising: a welding kit and the ultrasound generating system of any of claims 1-9;
the welding kit is connected with the ultrasonic generating system and driven by the ultrasonic generating system to perform welding.
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| CN202210037723.3A CN114378420A (en) | 2022-01-13 | 2022-01-13 | Ultrasonic wave generating system and ultrasonic welding machine |
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| CN202210037723.3A CN114378420A (en) | 2022-01-13 | 2022-01-13 | Ultrasonic wave generating system and ultrasonic welding machine |
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