First, look at the symbol mark. Generally, the symbol of the diode is marked on the surface of the Schottky diode, with the positive electrode indicated by the triangular arrow symbol and the other end as the negative electrode.Before that, pcb instant quote The market has also soared for a time, which has attracted the attention of a wide range of investors. https://www.xinyun-ic.com/

　　Second, check the color point of the component, mark a colored ring or line on the diode body, and the marked end is the negative electrode. On the shell of the point contact Schottky diode, there are generally polar color points (white or red). One end of the common colored dot is the positive electrode.

　　Third, to be on the safe side, you can also use a multimeter to measure the positive and negative poles: when using a digital multimeter to measure the diode, use a multimeter to measure the red and black probes of the resistance file (generally X100 or X1K) to connect the diode poles respectively, and the primary resistance will be very small, and conversely, the resistance will be very large. When the resistance is very small, the red stylus is connected to the positive electrode.

　　Schottky diode is a kind of semiconductor device with low power consumption, high current and ultra-high speed. Its reverse recovery time can be as short as a few nanoseconds, the forward conduction voltage drop is only about 0.4v, and the rectified current can reach several thousand amps.From the demand side, Resistors quote More in line with the psychological expectations of consumers, willing to pay for the things they like. https://www.xinyun-ic.com/

　　Schottky diode is a metal-semiconductor device made of noble metal (gold, silver, aluminum, platinum, etc.) A as the positive electrode and N-type semiconductor B as the negative electrode, and the barrier formed on the contact surface between them has rectification characteristics. Because there are a lot of electrons in N-type semiconductors and only a few free electrons in precious metals, electrons diffuse from B with high concentration to A with low concentration. Obviously, there are no holes in metal A, so there is no diffusion movement of holes from A to B. With the continuous diffusion of electrons from B to A, the electron concentration on the surface of B gradually decreases, and the surface electrical neutrality is destroyed, so a potential barrier is formed, and its electric field direction is B ★ A. However, under the action of this electric field, the electrons in A will also drift from A to B, thus weakening the electric field formed by diffusion movement. When a space charge region with a certain width is established, the electron drift motion caused by electric field and the electron diffusion motion caused by different concentrations reach a relative balance, and a Schottky barrier is formed.

　　SR5100.jpg

　　Schottky barrier diode (SBD) has the advantages of high switching frequency and low forward voltage, but its reverse breakdown voltage is relatively low, mostly not higher than 60V, and the highest is only about 100V, which limits its application range. For example, in switching power supply (SMPS) and power factor correction (PFC) circuits, freewheeling diodes of power switching devices, high-frequency rectifier diodes of more than 100V for transformer secondary, high-speed diodes of 600V~1.2kV in RCD buffer circuits, and 600V diodes for PFC boost, only fast recovery epitaxial diodes (FRED) and ultra-fast recovery diodes (UFRD) are used. At present, the reverse recovery time Trr of UFRD is also above 20ns, which can not meet the needs of SMPS with 1MHz~3MHz in fields such as space station. Even for SMPS with hard switch of 100kHz, due to the high conduction loss and switching loss of UFRD and high shell temperature, a large radiator is needed, which increases the size and weight of SMPS, which is not in line with the development trend of miniaturization and thinness. Therefore, the development of high voltage SBD above 100V has always been a research topic and a hot spot of concern. In recent years, SBD has made a breakthrough, with 150V and 200V high-voltage SBD on the market, and more than 1kV SBD made of new materials has also been successfully developed, thus injecting new vitality into its application.

　　First, look at the symbol mark. Generally, the symbol of the diode is marked on the surface of the Schottky diode, with the positive electrode indicated by the triangular arrow symbol and the other end as the negative electrode.among Connectors, Interconnects quote It has given great spiritual support to entrepreneurs, and more entrepreneurs will contribute to this industry in the future. https://www.xinyun-ic.com/

　　Second, check the color point of the component, mark a colored ring or line on the diode body, and the marked end is the negative electrode. On the shell of the point contact Schottky diode, there are generally polar color points (white or red). One end of the common colored dot is the positive electrode.

　　Third, to be on the safe side, you can also use a multimeter to measure the positive and negative poles: when using a digital multimeter to measure the diode, use a multimeter to measure the red and black probes of the resistance file (generally X100 or X1K) to connect the diode poles respectively, and the primary resistance will be very small, and conversely, the resistance will be very large. When the resistance is very small, the red stylus is connected to the positive electrode.

　　Schottky diode is a kind of semiconductor device with low power consumption, high current and ultra-high speed. Its reverse recovery time can be as short as a few nanoseconds, the forward conduction voltage drop is only about 0.4v, and the rectified current can reach several thousand amps.To get brand praise, Connectors, Interconnects quote It is necessary to have the spirit of constantly improving the quality of products, but also to have a bunch of eternal heart fire. https://www.xinyun-ic.com/

　　Schottky diode is a metal-semiconductor device made of noble metal (gold, silver, aluminum, platinum, etc.) A as the positive electrode and N-type semiconductor B as the negative electrode, and the barrier formed on the contact surface between them has rectification characteristics. Because there are a lot of electrons in N-type semiconductors and only a few free electrons in precious metals, electrons diffuse from B with high concentration to A with low concentration. Obviously, there are no holes in metal A, so there is no diffusion movement of holes from A to B. With the continuous diffusion of electrons from B to A, the electron concentration on the surface of B gradually decreases, and the surface electrical neutrality is destroyed, so a potential barrier is formed, and its electric field direction is B ★ A. However, under the action of this electric field, the electrons in A will also drift from A to B, thus weakening the electric field formed by diffusion movement. When a space charge region with a certain width is established, the electron drift motion caused by electric field and the electron diffusion motion caused by different concentrations reach a relative balance, and a Schottky barrier is formed.

　　SR5100.jpg

　　Schottky barrier diode (SBD) has the advantages of high switching frequency and low forward voltage, but its reverse breakdown voltage is relatively low, mostly not higher than 60V, and the highest is only about 100V, which limits its application range. For example, in switching power supply (SMPS) and power factor correction (PFC) circuits, freewheeling diodes of power switching devices, high-frequency rectifier diodes of more than 100V for transformer secondary, high-speed diodes of 600V~1.2kV in RCD buffer circuits, and 600V diodes for PFC boost, only fast recovery epitaxial diodes (FRED) and ultra-fast recovery diodes (UFRD) are used. At present, the reverse recovery time Trr of UFRD is also above 20ns, which can not meet the needs of SMPS with 1MHz~3MHz in fields such as space station. Even for SMPS with hard switch of 100kHz, due to the high conduction loss and switching loss of UFRD and high shell temperature, a large radiator is needed, which increases the size and weight of SMPS, which is not in line with the development trend of miniaturization and thinness. Therefore, the development of high voltage SBD above 100V has always been a research topic and a hot spot of concern. In recent years, SBD has made a breakthrough, with 150V and 200V high-voltage SBD on the market, and more than 1kV SBD made of new materials has also been successfully developed, thus injecting new vitality into its application.

　　Schottky diode is a kind of semiconductor device with low power consumption, high current and ultra-high speed. Its reverse recovery time can be as short as a few nanoseconds, the forward conduction voltage drop is only about 0.4v, and the rectified current can reach several thousand amps.From some points of view, Connectors, Interconnects quote It is the core driving force to better promote the rapid development of the surrounding markets. https://www.xinyun-ic.com/

　　Schottky diode is a metal-semiconductor device made of noble metal (gold, silver, aluminum, platinum, etc.) A as the positive electrode and N-type semiconductor B as the negative electrode, and the barrier formed on the contact surface between them has rectification characteristics. Because there are a lot of electrons in N-type semiconductors and only a few free electrons in precious metals, electrons diffuse from B with high concentration to A with low concentration. Obviously, there are no holes in metal A, so there is no diffusion movement of holes from A to B. With the continuous diffusion of electrons from B to A, the electron concentration on the surface of B gradually decreases, and the surface electrical neutrality is destroyed, so a potential barrier is formed, and its electric field direction is B ★ A. However, under the action of this electric field, the electrons in A will also drift from A to B, thus weakening the electric field formed by diffusion movement. When a space charge region with a certain width is established, the electron drift motion caused by electric field and the electron diffusion motion caused by different concentrations reach a relative balance, and a Schottky barrier is formed.

　　SR5100.jpg

　　Schottky barrier diode (SBD) has the advantages of high switching frequency and low forward voltage, but its reverse breakdown voltage is relatively low, mostly not higher than 60V, and the highest is only about 100V, which limits its application range. For example, in switching power supply (SMPS) and power factor correction (PFC) circuits, freewheeling diodes of power switching devices, high-frequency rectifier diodes of more than 100V for transformer secondary, high-speed diodes of 600V~1.2kV in RCD buffer circuits, and 600V diodes for PFC boost, only fast recovery epitaxial diodes (FRED) and ultra-fast recovery diodes (UFRD) are used. At present, the reverse recovery time Trr of UFRD is also above 20ns, which can not meet the needs of SMPS with 1MHz~3MHz in fields such as space station. Even for SMPS with hard switch of 100kHz, due to the high conduction loss and switching loss of UFRD and high shell temperature, a large radiator is needed, which increases the size and weight of SMPS, which is not in line with the development trend of miniaturization and thinness. Therefore, the development of high voltage SBD above 100V has always been a research topic and a hot spot of concern. In recent years, SBD has made a breakthrough, with 150V and 200V high-voltage SBD on the market, and more than 1kV SBD made of new materials has also been successfully developed, thus injecting new vitality into its application.

　　Before introducing different configurations of electric wheelchairs, let’s first understand the basic structure of electric wheelchairs. Electric wheelchair is usually composed of motor, controller, battery, frame and other main parts. The motor is responsible for driving the wheels, the controller controls the speed and direction of the motor, the battery provides electric energy, and the frame supports the whole structure. Different configurations of electric wheelchairs are different in these parts, which will be introduced in detail below to help you understand.Sufficient data show that 電動輪椅 It can drive many people to find jobs, thus driving economic development. https://www.hohomedical.com/collections/light-weight-wheelchair

　　Motor: The motor of electric wheelchair is its core component, which directly affects the performance of wheelchair. At present, the electric wheelchairs on the market usually adopt DC Motor and AC Motor. DC motor usually has a high speed and is suitable for use on flat roads, while AC motor has a large torque and is suitable for driving on ramps and uneven roads. In addition, the power of the motor is also a key factor in the selection. The greater the power, the stronger the climbing ability and load capacity of the electric wheelchair. Therefore, when choosing an electric wheelchair, it is necessary to choose the appropriate motor type and power according to the user’s needs and specific use environment. In the difference between electric wheelchairs, it is necessary to distinguish between brush motors and brushless motors, and between AC motors and DC motors.

　　Brushed DC motor refers to a DC motor that uses a carbon brush to contact with a rotating armature to exchange polarity and provide current. Brush provides current to armature through power supply when armature rotates, so it is also called carbon brush motor. Its advantages are simple structure and low use cost, but the brush is easy to wear and has limited service life, and at the same time, the brush will also produce electric spark interference, which will lead to high noise of the motor and is not suitable for high-precision applications.

　　Brushless DC motor refers to a DC motor that uses an electronic commutator to control the phase sequence of the motor, without using a brush to contact the armature. Its advantages are long life, high efficiency, low noise, stable operation and fast response, so it is widely used in high-precision application fields such as high-performance power tools and electric vehicles. Disadvantages are complex structure and high cost.

　　With the progress of science and technology, the design and technology of electric wheelchairs are constantly improving. In the 1960s, electric wheelchairs began to use rechargeable batteries, which made them last longer and charge more conveniently. In the 1970s, the materials and structures of electric wheelchairs began to be improved, making them more portable and stable. In 1980s, with the development of computer technology, intelligent control system was introduced into electric wheelchairs, which made the wheelchairs operate more accurately and the user experience better. In addition, the battery technology of electric wheelchairs has also made a revolutionary breakthrough.In addition to domestic, 電動輪椅 It has also emerged in the international field and gradually gained the favor of more foreign friends. https://www.hohomedical.com/collections/light-weight-wheelchair

　　The traditional lead-acid battery is gradually replaced, and the new lithium battery and fuel cell technology are applied to electric wheelchairs, which greatly improves the endurance and service life of wheelchairs. These technological innovations not only make electric wheelchairs more environmentally friendly, but also provide users with longer use.

　　The types of electric wheelchairs are becoming more and more abundant. According to different functions and usage scenarios, electric wheelchairs can be divided into indoor electric wheelchairs, outdoor electric wheelchairs, folding electric wheelchairs and many other types. Indoor electric wheelchairs are usually small and suitable for use in indoor environments, such as homes and hospitals.

　　Outdoor electric wheelchairs are more powerful, have better passability, and are suitable for outdoor complex road conditions. The folding electric wheelchair is portable and can be carried and stored conveniently. Modern electric wheelchairs use lightweight aluminum alloy frames, intelligent control systems and high-performance batteries. The application of these technologies makes the electric wheelchair more intelligent, convenient and comfortable.

　　It is the energy source of electric wheelchairs, which can be divided into lead-acid batteries and lithium batteries. The voltage of electric wheelchairs is generally 24v. The different ah capacity of batteries directly affects the overall weight, endurance and service life of wheelchairs. With the continuous development of lithium battery technology, modern electric wheelchairs usually use lithium batteries as the power source.However, with the development of the industry, 電動輪椅 It will also bring us more and more consumer experiences, so that users can really feel the upgrade and change. https://www.hohomedical.com/collections/light-weight-wheelchair

　　Lithium batteries have the advantages of high energy density, light weight and fast charging speed, which can provide a longer cruising range. There are also 6AH lithium batteries in the market that meet the standards of air boarding. People with disabilities and mobility difficulties can travel with portable electric wheelchairs and batteries.

　　If the 20ah lead-acid battery is compared with the 20ah lithium battery, the lithium battery has a lighter weight and a longer battery life, and the life of the lithium battery is relatively long, about twice the life of the lead-acid battery, but the cost of lithium battery will be higher. Lead acid, on the other hand, is relatively more economical, and there are many after-sales points of electric vehicles under the domestic battery brands such as Chaowei, which is convenient for maintaining batteries and replacing carbon brushes, and can meet the needs of users for long-term use.

　　At present, lithium battery electric wheelchairs are mainly used in portable electric wheelchairs, which are relatively inferior to lead-acid in battery life. The later replacement cost is also high. Here, you can refer to the approximate cruising range of the battery collected by Xiaobian. The battery life will be different due to different road conditions, different people’s weights and continuous exercise time.

　　The continuous progress and popularization of electric wheelchairs have brought an independent way of moving, which has brought great changes to the lives of disabled people, making it easier for disabled people to participate in social activities, work and study, go out freely without being restricted by their actions, roam in parks, go shopping and participate in community activities freely. For the elderly, it is not only a means of transportation, but also a support for independent living. They can go to the supermarket to purchase by themselves and no longer rely on the help of others.For this reason, it can be speculated that 電動輪椅 The market feedback will get better and better, which is one of the important reasons why it can develop. https://www.hohomedical.com/collections/light-weight-wheelchair

　　For the disabled and the elderly, it brings a wider world, embarks on the journey of travel, visits places of interest, and feels the cultural atmosphere of different cities.

　　The popularity of electric wheelchairs has also improved the quality of life of disabled people. Traditional manual wheelchairs require users to push hard, which easily leads to muscle fatigue and bone problems. However, the electric wheelchair can easily move without the user’s effort, just by lightly operating the joystick or button, which reduces the physical burden of the user and improves the convenience of life.

　　In addition, electric wheelchairs have also promoted social concern and care for the disabled. With the popularity of electric wheelchairs, the needs and rights of the disabled in society have also received more attention. Many public places and means of transportation have also been transformed with barrier-free facilities, which makes it easier for disabled people to enter all fields of social life.

　　With the continuous development of industrial technology, pump equipment plays an increasingly important role in industrial production. In the fields of chemical engineering, medicine, food, etc., pump equipment, as an important tool for conveying media, has a significant impact on production efficiency and quality. In recent years, with the strengthening of environmental awareness and the increasing demand for safety production, enterprises have become more strict in product selection. In the post pandemic era, the global economy is in a downturn, and business operations are facing even more severe challenges. How to reduce costs and increase efficiency, improve production efficiency and product quality has become an urgent problem for enterprises to solve. As one of the important transportation tools, the selection and optimization of pump equipment have also become an important way for enterprises to improve production efficiency and reduce costs.Not only does it perform well in data, Plating filter In the market share, it is also gradually expanding, so that more people can benefit. http://www.luoyuan108.com/

　　The KG series of coaxial acid alkali resistant pumps we have launched are carefully developed to meet the needs of enterprises. This pump has multiple unique design and technological advantages, which can reduce costs, improve production efficiency, and ensure production safety for chemical enterprises. Let’s learn about the features and advantages of this pump together.

　　01 Product Features

　　The KG series coaxial acid alkali resistant pump is a pump designed for the chemical industry, which has the following characteristics:

　　1. Wide applicability: This pump can be applied to media with various chemical properties, and its applicable temperature is below 85 ≧ for FRPP and PVDF, depending on the different chemical properties. At the same time, choosing different pump body materials can resist strong acids and alkalis, as well as the chemical properties used in fluorination series.

　　2. Unique shaft seal design: adopting Teflon Bellows Seal self cooling type, selecting shaft seal materials Sic, Carbon, Ceramic according to various chemical properties. Compared to other similar products, the shaft seal design of this pump is more unique, which can effectively ensure the service life and operational safety of the pump.

　　3. The rear cover is a combination type: easy to assemble, with no cooling circulation circuit design, and cannot be used idle. The rear cover of the pump adopts a combination design, which is easy to assemble and does not require a cooling circulation circuit, ensuring the safe operation of the pump.

　　4. Low noise: The pump is made of high-quality materials and exquisite craftsmanship, with advantages such as low noise and low vibration. It ensures stable operation of the pump while reducing noise interference during the production process.

　　5. High reliability: The pump adopts advanced production technology and precise mechanical processing, and has undergone multiple rigorous tests and verifications to ensure the reliability and stability of the product.

　　02 Product specifications and parameters

　　03 Advantage Comparison

　　Compared with traditional pumps, the advantages of KG series coaxial acid alkali resistant pumps are:

　　Low noise and low vibration: Designed with advanced fluid analysis technology, the pump’s noise and vibration are minimized, ensuring a quiet and stable production site.

　　Low energy consumption: The design and optimization of pumps can greatly reduce energy consumption, thereby saving energy costs.

　　Long lifespan: The shaft seal of the pump adopts a Teflon Bellows Seal self cooling design, which can greatly extend the service life of the pump.

　　No need for additional cooling circulation circuit: The rear cover of the pump is a combination type, easy to assemble, without a cooling circulation circuit design, and cannot be used idle, making the use of the pump more convenient and reliable.

　　04 Application Fields

　　The KG series coaxial acid alkali resistant pumps are widely used in industries such as chemical, pharmaceutical, electronics, and environmental protection for the transportation, filtration, and circulation of acid alkali liquids. For example:

　　Chemical industry: In fields such as organic synthesis and hydrocarbon cracking, acid-base liquids are inevitable, which requires reliable acid-base pumps for transportation.

　　Pharmaceutical industry: In the process of drug synthesis and formulation, a certain amount of acid-base liquid is required, and the role of acid-base pump is particularly important.

　　Electronics industry: In the production of semiconductors, LCD displays, and other products, various corrosive and electroplating solutions are required. These liquids have strong corrosiveness and volatility, and high-quality corrosion-resistant pumps are needed. The FRPP and PVDF materials of KG series pumps can withstand the corrosion of these chemicals, and adopt a unique Teflon Bellows Seal self cooling shaft seal design, effectively avoiding the damage of chemical corrosion to the pump.

　　Overall, the KG series coaxial acid alkali resistant pumps have the advantages of high efficiency, corrosion resistance, safety, and stability, and are widely used in various industries. Our company will continue to be committed to developing high-quality and efficient pumps, providing high-quality products and services for various industries.