Product List
Contact Us
Email：qiao@hvtest.cc
Mobile：+8615871365102
What's app：+8615871365102
-
What aspects can determine if a series resonant brand is worth choosing?
2025-10-31Due to the fact that many factories now require good series resonance (also known as AC withstand voltage testing devices) for testing and stabilizing production efficiency, they also hope to purchase good series resonance brands. From what aspects can we determine which series resonance brand is worth choosing?Perhaps many people have this doubt when choosing a series resonance brand, worried that the chosen series resonance brand is not good, and feel that they have suffered a lot of losses. In fact, there are many ways that can be utilized when choosing a series resonance brand, such as understanding the length of time the brand has been established. The short time of the series resonance brand indicates that it is a newly established brand and cannot obtain very good guarantees in terms of technology or production technology. When using it, one may not be particularly confident. If the selected series resonance brand has been established for a long time and has a certain historical
MORE -
Capacitor inductor series resonant circuit
2025-10-31Capacitor inductor series resonant circuit? Wuhan UHV specializes in producing series resonant devices, with a wide range of product selection and professional electrical testing. When looking for series resonant devices, choose Wuhan UHV.There are many components composed of inductors and capacitors in the power system, such as equivalent inductance of power transformers, mutual inductors, reactors, generators, etc; Series and parallel capacitor banks for compensation, ground and phase to phase capacitance of line conductors, and equivalent capacitance of various high-voltage equipment. The combination between them can form a series of oscillation circuits with different self oscillation frequencies, and under certain conditions, can form a long-lasting ferromagnetic resonance overvoltage. In a series circuit composed of inductors and capacitors, when the capacitive reactance XC is equal to the inductive reactance XL, i.e. XC=XL, the phase of the voltage U and current I in the circui
MORE -
Research on the Characteristics of AC Resonant Circuits
2025-10-31Research on the Characteristics of Communication Resonant Circuits? Wuhan UHV specializes in producing series resonant devices, with a wide range of product selection and professional electrical testing. When looking for series resonant devices, choose Wuhan UHV.In circuits containing capacitors and inductors, if capacitors and inductors are connected in parallel, it may occur within a small period of time: the voltage of the capacitor gradually increases while the current gradually decreases; At the same time, the current of the inductor gradually increases, while the voltage of the inductor gradually decreases. And in another very short period of time: the voltage of the capacitor gradually decreases, while the current gradually increases; At the same time, the current of the inductor gradually decreases, while the voltage of the inductor gradually increases. The increase of voltage can reach a positive maximum value, and the decrease of voltage can also reach a negative maximum valu
MORE -
How can series resonance be relatively stable during use
2025-10-30The main purpose of using series resonance (also known as variable frequency resonance test device) for experiments is to maximize its advantages and ensure relatively stable voltage during use.In the process of conducting series resonance experiments, it is generally necessary to conduct multiple experiments in order to compare better performance during use. So generally, there won't be many problems during use, and only then can we ensure a smoother use of electricity. Therefore, during installation, it is necessary to follow the corresponding experimental data.Secondly, professional personnel must be responsible for installation during the use of series resonance, so as to effectively ensure the effectiveness of use and avoid many problems during installation. These are also some points to pay attention to when using this type of equipment. Only in this way can the advantages of the product be more prominent during use.In addition, when conducting series resonance experiments, i
MORE -
How to understand experimental cases of series resonance
2025-10-30Series resonance (also known as series resonance withstand voltage test device) is a device that will be used in the process of use, and there are many requirements that need to be met during the use of this device. Moreover, as long as we briefly understand it on the website, we can clearly understand the importance of this experiment. So how can we accurately understand the true situation of the data from these experimental cases?In the process of understanding, such experiments are generally targeted to a certain extent. So basically, the data is more suitable for personal use. However, in the process of conducting experiments, it is important to pay attention to how many times it is repeated, so that the effectiveness of use can be more professional. Therefore, special attention must be paid to these issues, only in this way can the effectiveness of use be effectively guaranteed. And it can also avoid many problems during use.Secondly, in the process of use, we all know that series
MORE -
What are the prerequisites for series resonance test?
2025-10-30Series resonance basically belongs to some electrical tests in the process of free use, and there are also many issues that need to be paid attention to during the testing process, so that its advantages can be better highlighted during use. However, in the process of testing, it is not just about conducting tests, there are a series of advance conditions that need to be met, which need to be understood clearly.Firstly, in the process of conducting a series resonance test device, it is necessary to conduct a simple analysis of this method, as different data needs to be obtained during the experiment, and the results will also be completely different during the experiment. So don't rush to conduct experiments while obtaining the experimental data. Let's first analyze what subjects are needed in the experiment, what accessories are needed, and so on. After preparing a series of conditions for the series resonance test, the next step is to select different data so that the voltag
MORE -
What should be noted when maintaining series resonance?
2025-10-29No matter how good the testing equipment is, it requires very good assistance in use to stabilize its testing performance and extend its lifespan. So, what should be paid attention to when maintaining the series resonance (also known as the cable withstand voltage test device)?Firstly, when maintaining series resonance, everyone only needs to understand the correct maintenance method. Some people think that the operation of series resonance is relatively simple and the performance is relatively stable. Therefore, according to their previous understanding of it, they can have a very good maintenance effect. But if people really think like this, it is very likely to lead to more problems when implementing maintenance measures, and it will also result in poor maintenance effectiveness, affecting the accuracy of equipment repair and detection, and unable to provide a very good fault detection report or a very good solution to restore the production efficiency of factory equipment. Therefor
MORE -
What is the way to distinguish the quality of series resonance?
2025-10-29The factory chooses a good testing device. The factory equipment has very complete testing. Of course, when choosing a series resonance (also known as a power frequency withstand voltage tester), it is also necessary to understand the way to distinguish the quality of series resonance? Since you are spending money to purchase it, you definitely need to ensure that its performance is very comprehensive and the test results are very good in order to meet the selection needs of your factory.When choosing a series resonance, it is necessary to have an understanding of both its manufacturer and the manufacturer's production process. The manufacturer has good strength and a very sophisticated production process, which can naturally produce series resonance with particularly good performance and very simple operation. When using series resonance to test factory equipment, it can also save a lot of time and energy, allowing everyone to feel its high value throughout the entire testing proc
MORE -
How to choose a suitable series resonance?
2025-10-29There are many different series resonances (also known as AC withstand voltage test devices) in the market now, which makes many people confused when choosing. It is very important to choose a very suitable series resonance that can meet the equipment testing needs of one's own factory. So, how to choose a suitable series resonance?When choosing a suitable series resonance, the first step is to determine the style and specifications of your detection device. If the series resonance style and model you choose do not match the style and model you install, even if you purchase a series resonance with good performance, it will not highlight its very accurate detection ability and will bring you great trouble. Because choosing a series resonance is a very complex matter, it is necessary to consider its manufacturer's reputation and strength. Therefore, when choosing a series resonance, it is also necessary to consider the model of the factory equipment, and then select a series reso
MORE -
Why does series resonance have similar characteristics to power sources?
2025-10-28Usually, we will find that series resonance (also known as series resonance test device) has similar related characteristics of the power supply, and the reason for its similar related characteristics is also due to its own basic circuit structure. For a current source, its characteristic is that the current value it outputs is not affected by external loads and is only related to its own factors.And for the voltage source, its output voltage is also related to its own factors, and has no relationship with other external loads. At the same time, they will not be affected by external loads or factors that cause changes in voltage and current. Simply put, as long as they do not change themselves, the values they output are constant.Usually, when we refer to a component with similar power characteristics, it means that its output power is independent of other external factors or has little relationship with other load factors. Therefore, we call it a component with similar power character
MORE -
What are the sources of frequency error in series resonance?
2025-10-28Series resonance (also known as variable frequency series resonance withstand voltage device) may inevitably experience some errors during use. So, what are the main sources of frequency errors? Firstly, it is possible that there may be errors between the resistors, capacitors, inductors, and other instruments used in the experiment and their rated values. However, the errors caused by this may not be significant, usually only accounting for a few percent of the possibility, but the difference can even be around plus or minus ten percent. Such errors are considered relatively large.Then errors may occur when connecting circuits in a series resonance test circuit due to improper operation, resulting in errors such as wire resistance, welding resistance, parasitic capacitance, and parasitic inductance. However, these errors can be said to be very small, usually accounting for a few thousandths of the possible errors.Of course, when conducting experiments, it is humans who are doing the e
MORE -
What are the small details involved in selecting series resonance?
2025-10-28Many people believe that when choosing a series resonance (also known as a series resonance withstand voltage device), they hope to have a preliminary understanding of the small details involved in selecting a series resonance? After all, many people have spent a lot of time and effort in the previous selection process, but still haven't found the suitable series resonance for themselves.When choosing a series resonance, it is important to understand whether its performance is stable or what its detection power is. A series resonance with higher detection power and stable performance can detect all problems within a few minutes during detection, and specific data values can also be obtained from the LED display screen. At this point, it is also very helpful for restoring the production capacity of the equipment, as equipment failure can seriously affect its character and prevent it from producing very good products. How can it have its own position in the market.When selecting a se
MORE -
Series resonance technology is mature and widely applicable
2025-10-27If the series resonance purchased by oneself does not have a very high technical content, or if various faults always occur during use, it will seriously affect its usability and cause great losses to one's own factory. However, now that the series resonance technology is mature and widely applicable, it is a testing equipment that many factories are competing to choose.Any manufacturer needs to ensure that a certain testing equipment has a very high technological content and very accurate detection performance when designing it, in order to become an advantage of their product and have corresponding value in the market. The series resonant device can highlight this point. Its entire detection speed is very fast, with high accuracy. With the correct operation, it can detect the problem of factory equipment in just a few minutes. It can also use data analysis on the LED screen to understand how to solve product equipment failures and the overall production efficiency of the factory.
MORE -
Strong series resonance function and strong protection
2025-10-27Regardless of the type of testing device purchased, it is necessary to ensure that it is a highly powerful and suitable testing device for the needs of one's own factory. Every customer in the market should choose it now.For example, when using series resonance, people may find that the operation is very simple. Before using series resonance, it is necessary to understand whether there is a problem with its circuit. Once this is determined, as long as it is installed properly, simple data operations can be used to find out what the fault is in their own equipment within a few minutes. Through corresponding data analysis, a good method can also be found to accurately detect electronic faults. More and more people now consider series resonance when choosing a powerful electronic detection device, which can ensure that customers will not suffer any losses during use and can also provide me with satisfactory detection results.The self-protection of series resonance equipment is also ve
MORE -
What are the ways to extend the service life of series resonance?
2025-10-27The detection value of series resonance (also known as series resonance withstand voltage test device) for factory equipment is increasing. When using it, it is necessary to find a good way to extend the service life of series resonance in order to be more conducive to the use of the factory. So, what are the ways to extend the service life of series resonance?Before using series resonance, it is necessary to understand its correct usage. Only by knowing the correct selection method can there be no problems during operation that may result in inaccurate detection data or affect the service life of series resonance. If you are not particularly familiar with the usage of series resonance, you can directly read the user manual of series resonance or communicate with the manufacturer's staff to get a very good answer, which can also help you operate series resonance in the correct way and naturally extend the service life of series resonance.Of course, after using series resonance, it
MORE -
Calculation method for frequency conversion series resonance
2025-10-24Variable frequency series resonance mainly refers to the voltage and current of the studied series circuit reaching the same phase, that is, the inductance reactance and capacitance reactance of the inductor in the circuit are equal in value and time, making the studied circuit exhibit pure resistance characteristics. At a given terminal voltage, the maximum current will occur in the studied circuit. The maximum active power is consumed in the circuit.Calculation method for frequency conversion series resonancez=r+jx，x=0，z=r，i=u/z=u/r。 (1) Resonance definition: In a circuit, when the energy of two components is released by one reactive module and the other reactive module must absorb the same energy, the energy of the two components is equal, that is, there will be energy pulsation between the two reactive components.(2) In order to generate resonance, the circuit must have inductance L and capacitance C.(3) The corresponding resonance frequency is represented by fr as the resonance f
MORE -
The difference between series resonance and parallel resonance principles
2025-10-24Under the action of applied AC power, the circuit of inductance and capacitor will cause oscillation; Each oscillation circuit has its own natural frequency. When the frequency of the applied AC power is equal to the natural frequency of the loop, the amplitude of the oscillation (voltage or current) reaches its maximum value, which is called resonance; The input circuit of the radio is a resonant circuit. By changing the inductance or capacitance of the loop, the natural frequency of the loop is equal to the radio frequency to be received. By generating resonance, the signal of the radio can be selected. The intermediate frequency transformer of the radio is also a resonant circuit tuned at a frequency of 465 kHz, allowing the intermediate frequency amplifier to have maximum amplification capability for intermediate frequency signals at 465 kHz, while suppressing signals at other frequencies.In a series oscillating circuit consisting of resistors, inductors, capacitors, and an externa
MORE -
How is the principle of series resonance control circuit analyzed?
2025-10-24Switching converter is a negative feedback control system, and its control link is crucial. The control methods of the converter are divided into voltage mode and current mode. Voltage mode control is a single closed-loop control with only voltage feedback, and the error amplifier only detects the output voltage when the output current and output voltage change. The control is simple, but the dynamic and steady-state performance is not good enough. In addition, due to only adjusting the voltage without considering the impact of current changes on the system, it is impossible to adjust the power of the converter.On the basis of voltage feedback, current mode control also introduces a current feedback loop, which essentially makes the output inductor current follow the value set by the error voltage. The inductor can be replaced by a constant current source, so that the system can be reduced to first order through second-order, simplifying the design of the control system regulator. In t
MORE -
Reason for the inability of the series resonance test device to reach the set target voltage
2025-10-23The series resonance test device is the primary equipment for AC withstand voltage testing. Currently, in the power testing industry, the variable frequency series resonance withstand voltage test device is generally used for large capacity test samples. Because it adopts the LC oscillation principle of inductance and capacitance, an assembled device can be used to complete the withstand voltage test of long-distance cables and high-voltage electrical equipment. In practical applications, due to its simple operation and portability, it is widely used in power engineering commissioning projects. By controlling the power supply of the main converter, the current can be converted into a pure sine wave through AC-DC-AC conversion, and the output frequency and voltage can be adjusted within a certain range. It is the core control part of the series resonant boost test.Today, we will explain the possible causes and troubleshooting solutions for a common situation encountered on site, so that
MORE -
Why does the series resonance test device sometimes fail to measure the resonance point?
2025-10-23In work, power workers often need to test the incoming lines of high-voltage power cables to identify the resonance points of the cables, thus requiring the use of a series resonance test device, which is difficult to achieve the desired effect of the instrument. This article briefly introduces several main reasons for measuring the resonance point of a series resonance test device.(1) Equipment wiring error. The series resonance test device mainly consists of four main components: the test host, excitation transformer, reactor, and voltage divider. The device must be connected to the tested cable. If the wiring is incorrect, not only can the resonance point of the cable not be measured, but also the resonance point of the cable cannot be measured. It can also easily affect the lifespan of the series resonance test device and even burn out the equipment between them.(2) The equipment usage method is incorrect. When using the series resonance testing device, it is necessary to strictly
MORE
