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Is it possible to use a dc motor as a prime mover for a three phase syncronous ac generator?
Wiki User
∙ 12y ago
It is possible to use it
Wiki User
∙ 12y ago
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Why is necessary to control over speed in a motor?
over speed control is recommended for all prime mover driven generator to prevent over frequency operation of load connected to a system supplied by the generator and also to prevent possible over frequency operation of the generator itself from Ac system.
What happen if a prime mover fails when two generators are in parallel?
It acts as synchronous motor by consuming power from the other generator....
Prime movers for power generating operation?
A "prime mover" is part of a generator - specificially the thing that's causing the generator to spin (such as a turbine). It is called the prime mover because it is what is causing the generator's rotation.
What is prime mover in a dc generator?
The prime mover in a DC generator is the mechanical device or system that provides the initial energy required to rotate the generator's armature. It could be an engine, turbine, or any other source that converts mechanical energy into rotational motion. The prime mover rotates the generator's rotor, inducing a magnetic field and generating electrical power.
What Turns the arm of a generator?
It is called the prime mover.
How generator run?
By help of prime mover which supplies the mechanical energy to the shaft of generator(in case of dc generators).
Is electric motor a prime mover?
no it is not
Can you use a dc series motor as a prime mover for a dc generator. if not why?
A DC series motor would be ill-suited to this application. There would be times when the generator would be only lightly loaded and would present only a small mechanical load to the motor. Under these conditions the current in the field winding of the motor would become smaller and it would turn faster to generate the counter EMF necessary to balance its supply voltage. This could result in damage to both the motor and the generator. Please see the link.
What fuel used in DC generator?
Any generator, d.c. or a.c., is driven by a 'prime mover'. It's the prime move that uses fuel, not the generator! There are lots of different types of prime mover, including combustion engines (petrol, diesel), turbines (gas, water, air), etc.
Why is reverse power protection required in units like signal generators?
Results of Motorization of a GeneratorIf a generator loses prime mover power, it acts as a motor with a DC field on the rotorThe DC field will cause the rotor to try and follow the AC field in the same direction as beforeIf the mechanical drag on the rotor is heavy, it will fall behind and "slip poles,"inducing a large voltage into the rotor; this can cause insulation breakdown of the windings, flashover at the brushes, and violent shaking of the generator mountings.If a generator loses DC excitation to the rotor it will not generate, but the prime mover power will still turn the rotorNow the generator acts as a motor running at no load
Generator is moving 3000 RPM on 320Mw powerif full load rejected and any protection is not activate generator work as a motor what are damage possible?
depends on many things, including the type of prime mover (what is powering generator?). Presuming a steam turbine (or possibly combustion turbine though that's large for a single CT-gen) at that size and speed. "Rejection" of load is a term often misused. I'll presume correct use in this case, meaning that the generator remains connected to the grid, but for some reason has stopped producing power. If on the other hand what was meant was the generator was disconnected from the grid, it will not "motor". Upon rejection of load with no change in prime mover, the turbine would increase speed to a point where turbine over-speed protection would trip the prime mover to the turbine (fuel or steam), perhaps depending on design there may be some pre-emergency turbine controls to help reduce or control speed to below the trip point (perhaps about 110%, again depending on design). but if there is no controls that operate (including on turbine) turbine-generator unit may speed to point of damage (even destruction) as the centrifugal force of the higher speed exceeds design characteristics of the unit. Back to original question... If the generator rejected load due to loss of its field current, or either an open or short circuit in the generator, it likely will not motor. However, if the generator remains wholly intact and connected to the grid (meaning the reason for rejecting load is the loss or reduction of the prime mover to the driving turbine), the generator will motor. Possible generator damage could occur due to heating or pole piece shifting, depending on how sudden the change of phase angle (power flow) occurred. More likely, is (steam) turbine damage caused by overheating, most often starting with the lower pressure area blading. It is not uncommon to "motor" hydro electric generators operating either as a pump, or as a synchronous condenser for voltage or VAR control. But hydro-turbine-generators operate much slower RPM, with larger mass and damage is not incurred.
How DC motor converted into DC generator?
Both dc generator & dc motor are the same and known dc machine.when we give an electrical supply to the dc machine a torque developed due to flux intraction & works as motor.but we used dc machine as a generator we rotate the rotor or prime mover by using external sourse.due to this the rotor conductors cut by the stationary magnetic field and electrical power is generated as per faradays law.Here the main difference is when we giving electrical energy to the rotor of dc machine produce torque(motor)but when we give the mechanical energy to rotor it produce electrical energy(generator)
