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2. Three-phase electric power - Wikipedia

   en.wikipedia.org/wiki/Three-phase_electric_power

   An important class of three-phase load is the electric motor. A three-phase induction motor has a simple design, inherently high starting torque and high efficiency. Such motors are applied in industry for many applications. A three-phase motor is more compact and less costly than a single-phase motor of the same voltage class and rating, and ...

3. Programmable load - Wikipedia

   en.wikipedia.org/wiki/Programmable_load

   A programmable load is a type of test equipment or instrument which emulates DC or AC resistance loads normally required to perform functional tests of batteries, power supplies or solar cells.

4. Phase-fired controller - Wikipedia

   en.wikipedia.org/wiki/Phase-fired_controller

   Phase-fired control (PFC), also called phase cutting or phase-angle control, is a method for power limiting, applied to AC voltages. [1] It works by modulating a thyristor , SCR , triac , thyratron , or other such gated diode -like devices into and out of conduction at a predetermined phase angle of the applied waveform.

5. Static synchronous compensator - Wikipedia

   en.wikipedia.org/wiki/Static_synchronous_compensator

   Single phase of a three-phase bridge rectifier, showing 2 levels possible. Bottom right shows the switch equivalent of the IGBT operation. One of the earliest VSC topologies was the two-level converter, adapted from the three-phase bridge rectifier. Also referred to as a 6-pulse rectifier, it is able to connect the AC voltage through different ...

6. Phase-locked loop - Wikipedia

   en.wikipedia.org/wiki/Phase-locked_loop

   A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the input and output phase in lockstep also implies keeping the input and output frequencies the same, thus a phase-locked loop can also track an input frequency.

7. Programmable logic controller - Wikipedia

   en.wikipedia.org/wiki/Programmable_logic_controller

   Before, control logic for manufacturing was mainly composed of relays, cam timers, drum sequencers, and dedicated closed-loop controllers. [3] The hard-wired nature of these components made it difficult for design engineers to alter the automation process. Changes would require rewiring and careful updating of the documentation.