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2. Solid-state transformer - Wikipedia

   en.wikipedia.org/wiki/Solid-state_transformer

   Some can convert single-phase power to three-phase power and vice versa. Variations can input or output DC power to reduce the number of conversions, for greater end-to-end efficiency. A Modular Solid-state transformer consists of several high-frequency transformers [1] and is similar to a Multi-level converter. As a complex electronic circuit ...

3. Frequency changer - Wikipedia

   en.wikipedia.org/wiki/Frequency_changer

   A variable-frequency drive (VFD) is a type of frequency changer used for speed control of AC motors such as used for pumps and fans. The speed of a synchronous or induction AC motor is dependent on the frequency of the AC power supply, so changing frequency allows the motor speed to be changed. This allows fan or pump output to be varied to ...

4. Amtrak's 25 Hz traction power system - Wikipedia

   en.wikipedia.org/wiki/Amtrak's_25_Hz_traction...

   The Jericho Park converter exceeds its efficiency design criteria of 95%. Major disadvantages of solid state converters include harmonic frequency generation on both the 25 Hz and 60 Hz sides, and lower overload capability. Sunnyside Yard (Long Island City), NY – Static Inverter rated at 30 MW ordered from ABB in 1993 for $27 million. This ...

5. Variable-frequency drive - Wikipedia

   en.wikipedia.org/wiki/Variable-frequency_drive

   The VFD controller is a solid-state power electronics conversion system consisting of three distinct sub-systems: a rectifier bridge converter, a direct current (DC) link, and an inverter. Voltage-source inverter (VSI) drives (see 'Generic topologies' sub-section below) are by far the most common type of drives.

6. SEPTA's 25 Hz traction power system - Wikipedia

   en.wikipedia.org/wiki/SEPTA's_25_Hz_Traction...

   All 25 Hz power on the ex-Reading system is generated at the Wayne Junction static converter plant. This plant was built between 1985 and 1990 and consists of three 15 MVA solid-state, cycloconverter-based modules. The system was built by ASEA and is similar technically to the converter later installed at Amtrak's Jericho Park converter.

7. Transformer types - Wikipedia

   en.wikipedia.org/wiki/Transformer_types

   A solid-state transformer is actually a power converter that performs the same function as a conventional transformer, sometimes with added functionality. Most contain a smaller high-frequency transformer. It can consist of an AC-to-AC converter, or a rectifier powering an inverter.