Ultrasound Power Supply
An ultrasonic power supply is often referred to as an ultrasonic generator, ultrasonic generator. Its role is to convert electrical energy into a high-frequency alternating current signal that matches the ultrasonic transducer. From the amplification circuit form, you can use linear amplification circuit and switching power supply circuit, high-power ultrasonic power supply from the conversion efficiency considerations generally use switching power supply circuit form.
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What is Ultrasound Power Supply
An ultrasonic power supply is often referred to as an ultrasonic generator, ultrasonic generator. Its role is to convert electrical energy into a high-frequency alternating current signal that matches the ultrasonic transducer. From the amplification circuit form, you can use linear amplification circuit and switching power supply circuit, high-power ultrasonic power supply from the conversion efficiency considerations generally use switching power supply circuit form. Linear power supply also has its own unique scope of application, its advantage is that it can not be strictly required to match the circuit, allowing continuous and rapid changes in operating frequency. From the ultrasonic industry, ultrasonic is mainly divided into self-excited and it excitation power supply.
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Advantages of Ultrasound Power Supply
High-frequency vibration
Ultrasonic power supplies are capable of generating high-frequency vibrations, often at frequencies above 20kHz. This high-frequency vibration can be used in applications such as cleaning, welding, crushing, and punching.
High efficiency
Ultrasonic power supply can be efficiently converted into mechanical energy, its energy conversion efficiency is as high as 90% or more. Therefore, the use of ultrasonic power supply can greatly reduce the waste of energy.
Precise control
Ultrasonic power supply can be adjusted through the voltage, current or frequency and other parameters to accurately control the ultrasonic waves it produces. This makes the ultrasonic power supply in many applications have a very important role.
High safety
Ultrasonic power supply in the use of the process will not produce harmful substances, and will not cause pollution to the surrounding environment. In addition, because of its generation of ultrasound waves have a high degree of directionality and concentration, so in the process of use will not cause harm to the surrounding people or things.
High reliability
Ultrasonic power supply using materials and processes are very advanced, so its reliability is very high. In the process of use, if a failure occurs, it is only necessary to carry out simple maintenance or replacement.
Principle of Ultrasonic Power Supply
The principle of ultrasonic power supply is first of all by the signal generator to produce a specific frequency of the signal, this signal can be sinusoidal signal, can also be a pulse signal, this specific frequency is the frequency of the transducer, generally used in ultrasonic equipment in the ultrasonic frequency of 20KHz, 25KHz, 28KHz, 33KHz, 40KHz, 60KHz; 100KHz or more! Has not been used in large quantities. But with the continuous development of precision cleaning in the future. I believe the use of the surface will gradually expand.
The more perfect ultrasonic power supply should also have a feedback link, mainly to provide two aspects of the feedback signal: the first is to provide the output power signal, we know that when the generator's power supply (voltage) changes. Generator output power will also change, which is reflected in the transducer on the mechanical vibration is big and small, resulting in unstable cleaning effect. Therefore, the need to stabilize the output power, through the power feedback signal to adjust the power amplifier accordingly, so that the power amplification is stable.
The second is to provide frequency tracking signal. When the transducer works in the resonant frequency point when the highest efficiency, the most stable work, and the resonant frequency point of the transducer will be due to assembly reasons and work after aging changes, of course, this change in frequency is just drift, the change is not very large, frequency tracking signal can control the signal generator, so that the frequency of the signal generator within a certain range to track the resonant frequency point of the transducer. Let the generator work in the best state. Of course, with the modern electronic ultrasound technology, especially microprocessors (uP) and signal processors (DSP) development, the generator's function is more and more powerful, but no matter how to change, its core function should be as described above, just each part in the realization of the ultrasonic technology is different.
Working Principle of Ultrasonic Power Supplies
The working principle of ultrasonic power supply mainly involves the process of converting electrical energy into mechanical energy. This can be broken down into the following steps:
A signal generator produces a signal of a specific frequency, which is usually matched to the resonant frequency of the transducer 顩? The signal can be sinusoidal or pulsed, the exact type being chosen according to the application requirements.
The generated signal is amplified by a power amplifier 顩?to boost it to a sufficient power level to drive the transducer.
After power amplification, the signal passes through an impedance matching circuit, which adjusts the output impedance to match the impedance of the transducer to ensure that the signal can be effectively transmitted to the transducer.
The transducer is the key component of the ultrasonic power supply, which is usually made of piezoelectric ceramic material. Under the action of the electric field, the piezoelectric ceramic will produce vibration, thus converting electrical energy into mechanical vibration energy. This vibration propagates into the material to produce an ultrasonic effect.
The core function of the ultrasonic power supply is to convert electrical energy into ultrasonic energy to produce physical effects, such as for medical diagnosis 顩? Industrial testing 顩?and materials processing 顩?and other fields.
Ultrasonic power supply generally consists of an oscillator. Amplifier and transducer three parts. Among them, the oscillator generates high-frequency signals, the amplifier will amplify the signal, the transducer will be converted into mechanical energy, the ultrasonic signal.
Oscillator
Oscillator is the signal source of ultrasonic power supply, its main role is to produce high-frequency signals. At present, the commonly used oscillators include crystal oscillators. LC resonator and impedance converter. In the oscillator, the crystal oscillator has high frequency accuracy. Temperature stability and other advantages, so the most widely used.
Amplifier
Amplifier is mainly composed of two parts: amplifier circuit and voltage regulator circuit. The amplifier circuit can amplify the signal generated by the oscillator to a sufficient level to drive the transducer to generate ultrasonic waves. The voltage regulator circuit ensures the stability of the ultrasonic power supply to the power supply to ensure the accuracy and stability of the output signal.
Transducer
Transducer is the ultrasonic power supply in the core components, responsible for the conversion of electrical energy into mechanical energy, ultrasonic signals. The structure of the transducer form is also relatively diverse, commonly used including piezoelectric ceramic transducer. Magnetostrictive transducer and piezoelectric ceramic/magnetostrictive double effect transducer and so on. Among them, the piezoelectric ceramic transducer because of its stable performance. The piezoelectric ceramic transducer is widely used in various fields because of its stable performance, high sensitivity and other advantages.
Ultrasonic Power Supply Frequency Adjustment
Ultrasonic power supply frequency adjustment methods mainly include manual adjustment . Automatic adjustment and other methods. The following is a detailed description:
Manual adjustment of frequency. Adjustment is made through the frequency knob or the tuning screw . The frequency knob is directly turned manually and gradually adjusted to the desired frequency; the tuning screw is suitable for cases where the knob cannot reach the desired frequency and needs to be connected to an oscilloscope for adjustment.
Automatic frequency adjustment. Automatic adjustment is realized through the phase lock loop or frequency lock loop to ensure that the output frequency is the same as the input frequency and maintain the stability of the frequency.
Other methods. Including voltage regulation method . Mechanical regulation method . Temperature regulation method and optical regulation method . The voltage regulation method regulates the frequency by selecting a suitable voltage through a voltage regulator; the mechanical regulation method regulates the frequency by changing the position and shape of mechanical parts; the temperature regulation method regulates the frequency by controlling the temperature of the ultrasonic generator; and the optical regulation method utilizes the electron beam processing technology and the laser beam controller to achieve fast and extensive frequency adjustment.
It should be noted that when adjusting the frequency, the frequency should be gradually increased or decreased, avoiding direct tuning to the desired frequency to prevent damage to the equipment. At the same time, ensure that the device complies with the usage specifications to ensure the accuracy and stability of the adjustment.
Ultrasonic Power Supply 6 Common Fault Analysis and Solutions
Ultrasonic power supply is an indispensable device for many industrial applications, and its stable performance is directly related to production efficiency and product quality. However, in the process of use, ultrasonic power supply will also encounter a variety of failures. In this paper, we will analyze the ultrasonic power supply of the common 6 major faults, and provide the corresponding solution to help users better maintain and use the equipment:
Ultrasonic power supply can not start
When the ultrasonic power supply can not start, you first need to check whether the power supply is normal. If there is no problem with the power supply, then the fuse inside the device may have blown. At this time, the need to replace the fuse. In addition, you also need to check whether the wiring of the device is solid, in order to avoid the failure caused by poor wiring.
Insufficient ultrasonic output
Insufficient ultrasonic output can be caused by a variety of reasons. First, it may be a transducer failure. The transducer is the core component of the ultrasonic power supply, if it is damaged or aging, it will lead to insufficient ultrasonic output. At this point, the transducer needs to be replaced with a new one. In addition, you also need to check whether the power tube of the ultrasonic power supply is damaged, if the power tube is damaged, it will also lead to insufficient ultrasonic output. At this time, the need to replace the power tube.
Ultrasonic power overheating
Ultrasonic power supply in the working process will produce a certain amount of heat, if the heat dissipation is poor, it will lead to equipment overheating. Equipment overheating will not only affect the ultrasonic output effect, but also may damage the device's internal electronic components. Therefore, when the ultrasonic power supply is found to be overheating, it should be stopped immediately and check whether the heat dissipation system of the equipment is normal. If there is a problem with the cooling system, you need to clean the radiator or replace the fan in time.
Ultrasonic power supply produces abnormal noise
Ultrasonic power supply will produce a certain amount of noise in the working process, but if the noise is too loud or abnormal, it may be a problem within the device. Common causes include loose transducer. Equipment internal accumulation of excessive dust and so on. For this situation, you need to regularly check whether the fastening components of the equipment is loose, and timely clean up the dust inside the equipment.
Ultrasonic power supply frequency instability
Ultrasonic power supply frequency stability is essential to ensure product quality. If the frequency is not stable, may lead to product failure. Common causes of frequency instability include equipment aging. Environmental temperature changes. For this situation, the equipment needs to be inspected and maintained regularly to ensure that it is in good working condition. At the same time, you can also consider taking some measures to reduce the impact of ambient temperature on the equipment, such as the installation of air conditioning and other equipment to regulate the room temperature.
Ultrasonic power supply display failure
Ultrasonic power supply display is an important interface for users to interact with the equipment. If the display fails, it may lead to the user can not operate the equipment correctly. Common display failures include black screen. Flowering screen and so on. In this case, you need to check whether the display of the device is damaged, and replace the damaged display in time. At the same time, it is also necessary to check whether the connecting cable of the device is firm, in order to avoid display failure caused by poor connection.
Ultrasonic Power Supply Precautions
Ultrasonic power supply, is an important part of the high-power ultrasonic system, can also be referred to as the electronic box. Ultrasonic drive power. Ultrasonic controller. Can be used for mask welding. Plastic welding. Can also be installed on the production line to achieve automation. However, the following points usually need to be paid attention to in use:
Make sure to submerge the ultrasonic emitting surface of the vibration plate 10mm before turning on the ultrasonic power supply, it is strictly prohibited to start the ultrasonic source without cleaning fluid in the cleaning tank, in order to avoid damage to the transducer.
Prevent hard impact and strong vibration of ultrasonic vibration plate, do not place the workpiece directly on the surface of the vibration plate.
Do not use the process of cleaning liquid surface above the vibration plate outlet, prohibit water flushing, so as not to splash water from the outlet into the vibration plate or electrical box caused by failure.
Vibration plate should not be immersed in strong acid and alkali solution for a long time.
Replacement of cleaning fluid, should avoid too large a temperature difference between the two, so as to avoid sudden cold and heat deformation of the vibration plate and cause vibration head off.
If the ultrasonic vibration plate surface has too much dirt, will weaken the ultrasonic vibration force, reduce the cleaning effect, should be cleaned up in a timely manner.
Clean up the vibration plate surface dirt, do not use sharp brushes to scrape the vibration plate surface and strong vibration.
Power supply voltage changes beyond the allowable range of the machine, should be suspended.
Ultrasonic Power Supply Common Problems and Maintenance
Ultrasonic power supply does not work.
First, check whether the power supply is turned on, if the power supply has been turned on, you should check whether the switch is off. Secondly, check whether the output of the ultrasonic power supply has electricity, if not, replace the new battery or turn the switch to ON. check the connection between the ultrasonic transducer and the circuit board, if there is any problem, it should be dealt with in time.
There is a murmur when the ultrasonic power supply is working. First of all, use a screwdriver to loosen the compression nut, and then tap the compression nut with your hand, if you find that the sound increases significantly, indicating that there is an internal short circuit, which needs to be repaired in a timely manner. Secondly, use the multimeter resistance block to measure the resistance value between the leads, if you find an abnormal resistance value somewhere, there may be a false weld at the place, which needs to be re-welded. , the replacement of damaged parts.
Ultrasonic transducer sound head off. First of all, we must carefully observe and find out the sound head off. Second, according to the degree of detachment to choose the appropriate tool to remove it. Once again, as needed, the sound head off the installation.
Ultrasonic power supply power is insufficient. First, check whether the ultrasonic source is damaged, if so, it is necessary to replace the new ultrasonic source. Then, check the circuit board for poor contact; repair the circuit board to restore it to normal operation.
When used for a period of time, the phenomenon of frequency reduction. First, determine whether it is a voltage problem or a current problem. If it is a voltage problem, you can properly adjust the voltage until the frequency returns to normal. If it is a current problem, you can adjust the current down appropriately until the frequency is restored.
In the process of use, due to temperature changes, resulting in equipment can not work properly. At this time, adjust the temperature to keep the equipment in normal working condition.
After working for a long time, the equipment is damaged due to vibration. In this case, the vibrating parts should be cleaned up in time to prevent damage to the equipment due to resonance.
In the process of use, there are often cases of burnt out electronic tubes. When encountering this situation, turn off the power supply first, and then check. If it is because the heat dissipation of the electronic tube is not good, causing it to be burned out, then the heat dissipation hole should be cleaned up in time and the cooling water should be added. If it is caused by other reasons, it is necessary, by the maintenance personnel sent to the door to deal with.
In the process of use, sometimes harmonic interference occurs. When encountering this situation, first of all, we should judge which type of interference, and then take corresponding measures.
After working for a long time, the phenomenon of no signal output will occur. In this case, the influence of other factors should be ruled out first.
Ultrasonic Power Supply Application Areas
Cleaning field
Due to the strong vibration and micro-jet effect of ultrasonic waves, so it is very effective for cleaning a variety of complex surfaces and difficult to clean the dirt. The use of ultrasonic power for cleaning has the advantages of good cleaning effect, fast speed, environmental protection and so on.
Welding field
Ultrasonic power in the welding field also has a wide range of applications. Through high-frequency vibration, ultrasonic waves can quickly two metal surfaces closely together, so as to achieve efficient, high-quality welding effect. In addition, ultrasonic welding also has the advantages of environmental protection and energy saving.
Crushing field
Ultrasonic power generation of strong vibration and high-speed impact can effectively break a variety of hard materials, such as rocks, ceramics, glass, etc.. This crushing method has the advantages of high efficiency, environmental protection, energy saving, and so on, so it has been widely used in many fields.
Perforation field
Utilizing the high-frequency vibration of the ultrasonic power supply, it can quickly punch tiny, uniform holes in various materials. This kind of punching has the advantages of high precision, fast speed and low cost, so it has been widely used in many industrial fields.
Standard output frequency: 28KHz, 40KHz, 60KHz can be customized according to user requirements of other frequencies
Timing function: According to user requirements for time setting
Standard input voltage
220V AC 50HZ
output power
0-3500W optional, 0-maximum power adjustable
Appearance size
350*380*130
Our factory
Lianyungang Longhai Mining Machinery Manufacturing Co., Ltd. began in 1996, formerly known as Lianyungang Longhai mining machinery manufacturing factory. Since 2006, it has introduced foreign capital and changed its name to Lianyungang Longhai Mining Machinery Manufacturing Co., Ltd. (hereinafter referred to as "Longhai mining machinery"). First engaged in the production and sales of small beneficiation equipment such as magnetic separators. Vacuum filters have been produced since 1999. Cylindrical vacuum filter, disc vacuum filter (plastic plate, filter cloth and filter medium). Since 2005, we have seen that many fine-grained concentrates and tailings in the mine beneficiation industry need to be dehydrated, the aperture of the filter cloth of the disc filter is too large, and the filtered fine-grained ore is easy to stick to the surface of the filter cloth or penetrate. In addition, the filtrate is too turbid and does not meet the discharge standard, so we began to produce a ceramic vacuum filter with a higher degree of automation. The filtrate is clear, the filterable material particles can reach 325 mesh, the water content is lower, and the degree of automation is higher, Lower power consumption.
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