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This section provides an overview for high frequency power supplies as well as their applications and principles. Also, please take a look at the list of 9 high frequency power supply manufacturers and their company rankings. Here are the top-ranked high frequency power supply companies as of January, 2025: 1.DAIHEN Corporation, 2.Ujwal Electronics, 3.NWL, Inc..
Table of Contents
A high frequency power supply is a power supply that outputs a constant voltage with a frequency ranging from several kHz to several hundred kHz.
Power supply types are classified according to their switching elements, with some using transistors and others using vacuum tubes. The vacuum tube method has been used for a long time and uses a large transmitter tube and transformer, so the size of the power supply is large.
On the other hand, the method using transistors has recently seen the development of inverters that use elements called MOSFETs, and the advantages are smaller size and higher power supply output efficiency. High frequency power supply is mainly used to heat objects using a method called induction heating.
Industrial applications include quenching, ERW pipe welding, thin steel plate heating, plasma generation, and cleaning.
High frequency power supplies are used to generate eddy currents to heat objects in high frequency induction heating. Specific applications are as follows:
Used in semiconductor and LCD manufacturing, MEMS manufacturing, solar cell manufacturing, plasma cleaning, steel and forging industries. It is also increasingly used in the new materials industry, food manufacturing, building materials manufacturing, wood drying, medical thermotherapy, electronics, automotive, vinyl fusion, and other industrial fields.
High frequency power supplies for plasma generation excite plasma by means of a high frequency electric field, thereby heating the ions and electrons that form the plasma. By irradiating the surface of polymer materials and other materials, they can be used to select the type of functional group and control the radical species on the surface, which is also used in the development of functional materials.
To generate a high frequency power supply, the input AC power supply must be converted once to DC, passed through an inverter, and then converted again to AC. First, the AC power supply is converted to DC using bridge diodes.
A bridge diode is an element consisting of six diodes connected in a bridge. By inverting the negative voltage side of the AC power supply, a DC voltage can be output. Next, the DC voltage is converted to a square wave using a switching element, and this square wave is connected to a matching transformer.
The voltage is then converted according to the number of transformer windings, and finally converted to AC power in a resonant circuit.
High frequency power supplies (inverters) are classified according to their switching elements.
Thyristors are used as the oscillator element. They are suitable for commercial power supply frequencies up to 10 kHz and high voltages, and have a large element.
Suitable for small oscillators 500W to 2kW. The element is small and is used for handy types, etc.
GBT stands for "Insulated Gate Bipolar Transistor." The elements are large and suitable for high-current applications and series resonance circuits. The frequency range is: 10kHz to 50kHz, for high output.
MOSFET stands for "Metal-Oxide-Semiconductor Field Effect Transistor." It is suitable for high-frequency applications and is smaller than other devices. Frequency range is 100kHz to 400kHz, so it is not suitable for high output power.
Vacuum tubes are suitable for high-frequency applications, self-excited oscillation type with frequencies ranging from 100 kHz to 10 MHz. They use a large transmitter tube and a large transformer, so the equipment becomes larger.
1. Voltage Control
This control method uses thyristors or other elements to suppress DC voltage. It is suitable for quenching because the frequency is fixed and the current penetration depth can be fixed.
The circuit is complex and expensive because of the need for flattening with a power supply capacitor.
2. Current Control
On the oscillator side, the output current value is constant because the frequency is varied by automatically adjusting the load resistance to match the indicated current value. Therefore, the oscillator frequency is always changing.
3. Power Control
The input power value is calculated by multiplying the voltage and current value of the DC section. The output is then controlled with respect to the indicated value.
4. PWM Control
This is a control method found in small oscillators. It is a control method in which the pulse width (duty ratio) is varied while the period remains constant.
*Including some distributors, etc.
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Incorporated in 1965, Analog Devices, Inc. designs, manufactures, tests, and markets integrated circuits (ICs), software, and subsystems that leverage analog, mixed-signal, and digital signal processing technologies. The company provides data converter products, power management and reference products for power conversion, driver monitoring, sequencing, and energy management applications in the automotive, communications, industrial, and high-end consumer markets. In addition, the company provides digital signal processing and system products for high-speed numeric calculations. It serves clients in the industrial, automotive, consumer, instrumentation, aerospace, and communications markets.
NWL, Inc. is an American manufacturer of transformers and power supplies that was originally founded as the Newell Manufacturing Company in 1933 before rebranding in 1991. Based in Bordentown, New Jersey, the company produces industrial- as well as military-spec transformers and inductors, electrostatic precipitators (ESPs), and power supplies. It also offers tech support, spare parts, repair and field services to customers in need of additional support. NWL products and services are used primarily by clients in the electrical, utilities, infrastructure, and military sectors.
Stangenes Industries, Inc. started in 1974 and is headquartered in Palo Alto, California. The company is a manufacturer of magnetic cores and transformers used in the medical and research industries and various military applications. Customers include the United States Department of Energy as well as research facilities such as CERN and DESY in Europe and KEK in Japan. Transformers are the company’s primary product including pulse, isolation, current, and general transformers. The company also produces electromagnets, pulse modulators, power supplies, and magnetic cores.
AMADA WELD TECH is a subsidiary of AMADA WELD TECH Co., LTD, which was founded in 1972. AMADA is based in Southern California and is a manufacturer of equipment and systems for resistance welding, hot bar bonding, laser marking, and other laser cutting services for industries such as aerospace, automotive, electronics, medical, and photonics. AMADA is ISO 9001:2015 certified. Examples of AMADA products include machines and systems for resistance welding, laser cutting, hermetic steam sealing, laser micromachining, and more.
DAIHEN Corporation, established in 1919 and headquartered in Osaka, Japan, is a manufacturer of Power Products, Industrial Robots, and RF/MW Generators & Automatic Matching Units for plasma applications. The company provides an extensive array of products, including Oil-immersed Transformer, Cast Resin Transformer suitable for high buildings, public facilities, and hospitals, Power Distribution Equipment such as closed type power distribution boards and remote monitoring systems, as well as Sensors for Robot Welding and Positioners & Sliders. The company also offers various welding & cutting machines, including TIG Welding Machines, Plasma Cutting Machines, as well as Peripheral Devices for Welding.
General High Voltage Ind. Ltd, founded in Shropshire, the UK, in 1991 is a manufacturer of high voltage power supplies. The company's product portfolio includes Electron beam welding machines, Industrial X-ray PSUs, Capacitor charging PSUs, Laser PSUs, and Electrostatic precipitators. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation. They also provide equipment repair, instrumentation system upgrades, and retrofits, and preventive maintenance.
Ujwal Electronics was established in 2010 and is based in Pune, India is a manufacturer and supplier of electronic instrumentation and automation products. The company’s product portfolio includes control panels, high voltage power supplies, high voltage transformers, lightning arrester testers, DC drives, and more. The electrical goods and accessories have been specifically developed to cater to a range of industrial applications and research endeavors. The goods find use across several industries like metal manufacturing, automotive, aerospace, jewelry, and electronics. These products are designed with an effort on optimizing energy efficiency and ensuring adherence to environmental regulations.
Zhongshan Haocheng Automation Equipment Co. Ltd., founded in 2009 and located in Zhongshan City, Guangdong Province, is a manufacturer, supplier, and researcher of industrial electrical equipment. The company supplies high-frequency lithium battery forklift chargers, industrial vehicle chargers, silicon oxide machines, hard oxidation power supplies, and car DC-DC converters. These products are used in battery charging, complex oxidation, electroplating production, and aluminum oxidation. In 2019 the company participated in the development of CCMA standards.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | DAIHEN Corporation |
18.4%
|
| 2 | NWL, Inc. |
15.8%
|
| 3 | Ujwal Electronics |
13.2%
|
| 4 | Stangenes Industries, Inc. |
13.2%
|
| 5 | General High Voltage Ind. Ltd |
13.2%
|
| 6 | Zhongshan Haocheng Automation Equipment Co., Ltd. |
7.9%
|
| 7 | AMADA WELD TECH INC. |
7.9%
|
| 8 | Analog Devices, Inc. |
7.9%
|
| 9 | EverExceed Industrial Co., Ltd |
2.6%
|
Derivation Method
The ranking is calculated based on the click share within the high frequency power supply page as of January 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
4 | 50.0% |
|
Japan
|
1 | 12.5% |
|
United Kingdom
|
1 | 12.5% |
|
India
|
1 | 12.5% |
China
|
1 | 12.5% |
62 products found
62 products
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