Diagram of induction generator. The speed is increased in the same direction as that of the rotating field produced by the stator windings. Induction generator connections the electrical connections in the conduit box should be made in accordance with the appropriate connection diagram. High wye voltage hz l l t60 12 lead480 dual voltage dual voltage single voltage wye voltage hz 6 leadl l 60 480 specifications general all standard marathon electric induction generators are manufactured to nema dimensions. This paper presents an analytical study by utilizing a circle diagram to illustrate the operation of the induction generator in isolated operation.
All testing is. To understand the circle diagram of induction motor we should first know what is the circle diagram. Power flow diagram and losses of induction motor power flow diagram of induction motor explains the input given to the motor the losses occurring and the output of the motor. We have two types of induction generator let us discuss the application of each type of generator separately.
The speed of the machine is increased above the synchronous speed by an external prime mover. Permanent magnet generators are simple and reliable and can work at low speeds so they are ideal for use with wind turbines. The input power given to an induction motor is in the form of three phase voltage and currents. The circle diagram is a graphic representation of the performance of the machine and its drawn in terms of the locus of the input voltage and current.
Just like a dc machine a same induction machine can be used as an induction motor as well as an induction generator without any internal modificationsinduction generators are also called as asynchronous generators. An induction machine sometimes is used as a generator. Because of this induction generators cannot usually black start a de energized distribution system. Application of induction generator.
Induction generator is also known as asynchronous generator. Sometimes however they are self excited by using phase correcting capacitors. Let us discuss application of induction generator. Initially an induction generator or the machine is started as a motor.
An induction generator is a type of asynchronous generator meaning the waveform that is generated is not synchronized to the rotational speed. Possible applications for the. The operating speed of the induction generator is extended without generating excessive loss. An induction generator is asynchronous in nature because of which it is commonly used as windmill generator as a windmill runs at non fixed speed.
The power flow diagram of an induction motor is shown below. It has been observed from fig. Externally excited generators are widely used for regenerative breaking of hoists driven by the three phase induction motors. Before starting to explain how an induction asynchronous generator works i assume that you know the working principle of an induction motor.
At the starting the machine draws the lagging reactive volt amperes from the supply mains. Circle diagram of induction motor. Before deepen in steps of drawing the diagram it.