Figure 2 6 WRSG based WTs In WRSG the machine side converter (MSC) uses a passive rectifier and the generator is controlled through a excitation control using DC/DC converter in the rotor winding. In case of PMSG the MSC is a fully controllable 4-quadrant converter (16). The frequency converters for both of these generators allow variable speed operation over a wide range, so it enables to attain maximum power generation. Figure 2 7 PMSG based WTs Doubly Fed Induction Generator
It is used to accelerate a hot, pressurized gas passing through it to a higher speed in the axial (thrust) direction, by converting the heat energy of the flow into kinetic energy. Because of this, the nozzle is widely used in some types of steam turbines and rocket engine nozzles. It also sees use in supersonic jet engines. The nozzle was developed by Swedish inventor Gustaf de Laval in 1888 for use on a steam turbine. This principle was first used in a rocket engine by Robert Goddard.
A transmission transfers the power created by the engine to the wheels through a driveshaft and axle. B. Being able to change the gears manually lets you change the torque on the wheels depending on the speed at which you are traveling, torque is a measure of how much a force acting on an object causes that object to rotate. C. Each gear has its own ratio of rpm, which is revolutions per minute, which is a measure of the frequency of a rotation, it annotates the number of turns completed in one minute around a fixed axis. D. The clutch is a mechanical device that provides for the transmission of power ( usually motion) from one component (the driving member) to another (the driven member) when engaged, but can be disengaged.
The reason why helicopters stay up in the air is because the individual rotary blades are shaped like airplane wings. Once the spinning rotor assembly has reached a certain speed, the curved blades chop up the air around them, creating lower pressure above the blade and higher pressure below. This action creates a pushing or lifting force from below. The pilot uses hand and foot controls to change the angle of attack on each blade as they spin. This angle affects whether the helicopter will rise, descend, turn, or even hover.
However, have you ever wondered how the airplane works when it flying in the sky? An airplane by definition is a powered fixed-wing aircraft that is propelled forward by thrust from propeller or jet engine (Wikipedia). As the figure shows below, there are four main forces acting on the airplane, which are gravity, lift, thrust, and drag. [pic] Gravity Every object on the earth undergoes gravity, which is actually a force of acceleration. The gravity equals Mass times Acceleration, or G=ma.
In an EV, the electric motor is of ‘paramount importance’  as the main drive system. Electric cars have an electric motor and a controller powering the motor. Rechargeable batteries are used to provide power to the controller. Electric cars have more wires in them compared to gasoline car’s, this is because gas-powered cars have an abundance of hoses, pipes and fuel lines instead. Electric cars have not only now become a possible future within the way all vehicles are powered, but they’re expected to start rolling of the assembly lines of major automobile manufacturers in the next few years.
Case studies and results Fig. 3 depicts the main dimensions of the rotor, and the position of the AMBs and touchdown bearings. The main parameters of the rotor system are shown in Table 1. Fig. 4 shows the finite element model of the rotor including the node numbering.
James Watt's development of the steam engine led to a large number of further developments. using steam to create energy meant that this new form of powering a machine could be used anywhere, rather than just next to a stream/ river as with the Water Frame. The steam engine is best associated with the invention of trains but also was used to power machinery in factories, to power lifts in mines and for many other purposes.Hydraulic Power. The industrial
The permanent magnet is fixed firmly into position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed. This means that it is in turn attracted to and repelled from the permanent magnet, vibrating back and forth. The electromagnet is attached to a cone made of a flexible material such as paper or plastic which amplifies these vibrations, pumping sound waves into the surrounding air and towards your ears. Inside a speaker: 1.
The first principle states that if there is no force applied to the gyro, the spin axis of the gyro wheel tends to remain in a fixed direction in space. Precession is the tilting or turning of a gyro in response to a force. For instance, whenever a plane changes direction, small perpendicular force applied to gyro. As result of, the gyro will rotate 90 degrees ahead of that point of force. Gyroscope is being used in almost every vehicle especially in airplane’s instrument such as altitude indicator, heading indicator, and turn coordinator.