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An induction generator produces electrical power when its rotor is turned faster than the synchronous speed. For a four-pole motor (two pairs of poles on stator) powered by a 60 Hz source, the synchronous speed is 1800 rotations per minute (rpm) and 1500 RPM powered at 50 Hz. The motor always turns slightly slower than the synchronous speed.
The faster spinning generators might store more kinetic energy (proportional to square of the rotational frequency), but are typically lighter and thus decelerate faster, causing more power to be injected early in the response ("front-loading") when compared to the slower and heavier machines; this is not necessarily better due to interaction ...
It is also known as a unipolar generator, acyclic generator, disk dynamo, or Faraday disc. The voltage is typically low, on the order of a few volts in the case of small demonstration models, but large research generators can produce hundreds of volts, and some systems have multiple generators in series to produce an even larger voltage. [ 18 ]
The combined cycle power plants consist of few stages with varying startup times with more than 8 hours required to get to full power from cold state: [5] the gas turbine can start in 15-30 minutes; the steam turbine (ST) heating process takes from 1 hour (for hot startup) to 6 hours (for cold startup);
A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed, because the magnetic field is generated through a shaft-mounted permanent magnet mechanism, and current is induced into the stationary armature.
A small demonstration Marx generator (tower on the right). It is a ten stage generator. The main discharge is on the left. The nine smaller sparks that can be seen in the image are the spark gaps that connect the charged capacitors in series. A Marx generator is an electrical circuit first described by Erwin Otto Marx in 1924. [1]
When that happens, the fish immediately release venom into whatever disturbed it. Effects are fast acting and can include heart stoppage, seizures, and paralysis. Number 8.Cleaning the toilet. No ...
The chain can be operated at a much greater velocity than a belt, and both the voltage and currents attainable are much greater than with a conventional Van de Graaff generator. The 14 UD Heavy Ion Accelerator at the Australian National University houses a 15 MV pelletron. Its chains are more than 20 m long and can travel faster than 50 km/h ...