This section provides an overview for auxiliary power supplies as well as their applications and principles. Also, please take a look at the list of 11 auxiliary power supply manufacturers and their company rankings.
Table of Contents
An auxiliary power supply is connected to the power supply unit of a main unit, and is a power supply device that is used to supplement the power supply that tends to be in short supply, separately from the main power supply.
For example, if the main power supply of a railroad car is mainly used to drive the car, an auxiliary power supply is used to provide a stable power supply for the air conditioning and lighting in the car. Similarly, power supplies for graphic displays in personal computers are also typical auxiliary power supplies.
Note that auxiliary power supply is also power supplies that receive power from the same power supply unit as the main unit.
The main application of auxiliary power supplies are to provide a stable supply of power for air conditioning and lighting in railcars, as mentioned above.
High-voltage power (1500 to 2500 V) supplied from overhead wires is converted to low-voltage power (440 to 100 V) via auxiliary power supplies unit. This is because most train cars are designed to use 100 VAC for various lighting and indicator lights, 3-phase 440 V for air conditioning equipment, and 100 VDC for door opening/closing devices, etc.
Apart from this example, a storage battery-type power supply called a UPS is also auxiliary power supplies in the broad sense of the term, as it is used to protect personal computers and network computers from data loss due to instantaneous power failure in the event of a power company blackout.
There are two main types of auxiliary power supplies for vehicles: MGs (Motor Generators) and SIVs (Stationary Inverters).
The MG (Motor Generator), also called an electric generator, has long been used as an auxiliary power supply.
On the other hand, the SIV (Static Inverter) uses IGBTs, which are typical high-power semiconductor devices, in the inverter circuit. which is also called a static inverter. there are different types of SIVs, including 3-level, 2-level, and 2-level inverters, as withstand voltage improvements were made according to the IGBTs' development period at the time. SIVs are also known as pulse-width modulation (PWM) control inverters, which can now be supported by small AC filters, contributing greatly to the miniaturization and high efficiency of auxiliary power supplies.
The low-voltage power supply generated by the SIV is an AC power supply, so the 100 VDC required for control equipment is converted by a rectifier.
*Including some distributors, etc.
Sort by Features
Sort by Area
Texas Instruments Incorporated was founded in 1930 and is headquartered in Dallas, Texas. Texas Instruments is a producer of high tech equipment for industrial, automotive, personal electronics, communications equipment industries. Texas Instruments designs, manufactures, and sells semiconductors to electronics designers and manufacturers in the United States and internationally. Texas Instruments operates in two segments: analog and embedded processing. The Analog segment offers power products, including battery-management solutions, DC/DC switching regulators, power switches, linear regulators, voltage references, and lighting products. The Embedded Processing segment offers microcontrollers that are used in fields such as electronic equipment and digital signal processors for mathematical computations.
ST Micro Electronics is a global semiconductor company serving customers with innovations to have a positive impact on people's lives. Their product line is micro electronic systems, such as switches, controllers, sensors and drivers. The main selling point of ST Micro Electronics is its provision of sustainable products, and introducing their electronics to create a more sustainable world. The company, as well as providing the electronic devices, also provides software and support, ensuring that all fields are covered to provide a fully provide a supported and strong relationship with their customer base. ST Micro Electronics believe that technology plays a key role in helping to solve environmental and social challenges, which is why their semiconductor technologies start with their employees, their customers and partners.
Toshiba has nearly a century-and-a-half-long history of pioneering the development of electrical equipment in Japan, providing customers with products and services such as energy systems and solutions and infrastructure systems and solutions. With a focus on digital technologies, Toshiba boasts cutting-edge products in semiconductors, barcode printers, and rechargeable Lithium-ion battery cells, modules, and industrial pack series. With arms in business, R & D, AI, sustainability, and digital solutions, Toshiba and its people evolve with the times, ensuring its continuing ability to solve ever-changing social issues through constant change. By utilizing the knowledge that Toshiba has amassed across numerous business domains, along with cutting-edge technologies like IoT, AI, and quantum related technologies, they have created digital solutions that provide our customers with new value and services
Number of Employees
Newly Established Company
Company with a History
This is the version of our website addressed to speakers of English in the United States. If you are a resident of another country, please select the appropriate version of Metoree for your country in the drop-down menu.