1.0 What Causes the Tides Tides are periodic rises and falls of large bodies of water. Tides are caused by the gravitational interaction between the earth and the moon. Tides are the cyclic rising and falling of earth’s ocean surface caused by the tidal forces of the moon and the sun acting on the earth . Tides cause changes in the depth of the sea and produce oscillating currents known as tidal streams‚ making prediction of tides important for coastal navigation. The strip of seashore
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ring assembly on the rotor in order to communicate current‚ i.e. to switch current from one winding to another‚ as a function of rotor position so that the magnetic fields of the rotor & stator are always at a 90o angle relative to each other. Brushless DC Motor: is an inside-out version of the brush-type DC motor‚ i.e. the rotor has the permanent magnets & the stator has the winding. Hence‚ magnetic fields of the rotor & stator must be perpendicular to each other at all rotor positions. Communication
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working‚ the rotors can become warped and damaged‚ and this metal grinding will shorten the life of properly working parts. What kind of symptoms and sounds indicate I need brake repairs? Paying close attention to sounds‚ sensations and smells will help you find brake problems: Squealing‚ screeching‚ or grinding sounds usually indicate your brake pads & shoes
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IBR (Integrated Blade Rotors) are among the most innovative and challenging components in modern gas turbine engines. BLISK may be integrally cast‚ machined from a solid piece of material or made by welding individual blades to the rotor disc. Initially BLISK was used only in first stage LP compressor. Its low weight and excellent aerodynamic efficiency making it popular for use in the HP stage also. CONVENTIONAL DISK Vs BLISK 2. Conventional rotor disk comprises rotor blades secured on the
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by the controller. Therefore‚ if the rotor leaves its center position‚ the control system will change the electromagnet current in order to change its attraction force and‚ respectively‚ draws the rotor back to its balance position. i I M PROVED M ACHI NE PERFORM ANCE CONTROL TECHNOLOGY USI NG ACTI VE Active Magnetic Bearings (AMBs) with their control system inherently offer the possibility of continuously recording bearing forces and rotor displacements. This allows on-line monitoring
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Parts of a wind turbine 1.6 History of windmills 2. Types of wind energy conversion devices 2.1 Dutch type grain grinding wind mills 2.2 Multiblade water pumping windmills 2.3 High speed propeller type windmills 2.4 The savonius rotor 2.5 The darrieus rotor 2.6 Giromill 3. Yaw control of Wind turbine 3.1 Importance of Yaw control 3.2 History 3.3 Different stages in yaw control 4. Different parts of yaw system 4.1 Yaw Bearing 4.2 Yaw Drive 4.3 Yaw brake 4.4 Yaw Vane 5. Types of yaw
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this point‚ the current is boosted to the high voltage needed for ignition and is then relayed to the rotor. The distributor is separated into three sections: the upper‚ middle‚ and lower. In the middle section‚ the corners of the spinning breaker cam strike the breaker arm and separate the points some 160 miles an hour. High-voltage surges generated by the action of the coil travel to the rotor that whirls inside a circle of high-tension terminals in the distributor cap‚ at each terminal‚ current
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on the current passing through the winding and the magnetic field strength. If more current is passed through the winding‚ then more force (torque) is obtained. In effect‚ two magnetic fields interacting cause movement: the magnetic field from the rotor and the magnetic field from the stators attract each other. This becomes the basis of both AC and DC motor design. AC MOTORS Most of the world’s motor business is addressed by AC motors. AC motors are relatively constant
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internal combustion engine which uses a rotary design to convert pressure into a rotating motion instead of using reciprocating pistons. Its four-stroke cycle takes place in a space between the inside of an oval-like epitrochoid-shaped housing and a rotor that is similar in shape to a Reuleaux triangle but with sides that are somewhat flatter. This design delivers smooth high-rpm power from a compact size. Since its introduction the engine has been commonly referred to as the rotary engine‚ though this
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for any engine that will see 8000 rpm and above. They weigh significantly less than the stock (cast iron) apex seals and provide lower mass‚ keeping the apex seal in contact with the rotor housing face at high rpm. At high rpm‚ the stock (cast iron) seal overcomes the spring‚ causing the seal to skip across the rotor housing surface‚ reducing engine performance. Cast iron seals also can warp at high rpm. Iannetti Advanced Carbon Apex Seals Design The two (2) spring design allows for a higher
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