1. Electrical Drives: Systems which employed for motion control are called as Drives. Drives employ any of the prime movers for deliverying mechanical energy for motion control like Diesel engines, steam turbines and electric motors. Drives which employ electric motors are called as Electrical Drives. Basically Drive is a combination of various systems combined together for the purpose of motion control. Electrical drives are available with vast range of torque, speed and potential. Can employed electric braking due to which they are having malleable star control components. Previously, Induction and contemporary motors were employed mainly in constant speed drives. DC motor used by variable speed drives uses dc motor.The DC motor drive is used in many industries for the conversion of electrical energy into mechanical energy. One of the main reasons for choosing DC motors is the simplicity of their speed control.Now AC motors can also be used in variable speed drives which uses semiconductor converters. -Components of an Electrical Drive System: The ‘drive’ is completely an pound gadget united at once to a potential supply. This configuration is widely in use but pair cannot application definitely praisefully give …show more content…
It is asserted that it is essential to fully understand the nature of the load and the user requisite which must be contented by the drive. The load component might or might not have sensors to measure either speed, torque or shaft angle. The sensors which can be used are widely determined by the application. The nature of the load may be translational or rotational and the drive designer must make a judicious choice whether to use a direct-drive with a large motor or geared drive with a smaller but faster one. Moreover, the nature of the load in terms of the need for continuous or recurrent operation must be
* This type of system is also referred to as a continuously variable transmission. It is called this because as the engine speed increases the final drive ratio increases. That is, the difference between the engine speed and track speed decreases. It is equivalent to an automatic transmission on a car with an infinite number of gears that you never felt shift. Let's take a look at how this "infinite gearing" process works:
The experiment test-bed is composed of a DC motor, an engine, a chain drive, a shaft and other accessorial components. The DC motor is used to drive the engine shaft and its speed can be up to 1450 r/min.
Roller screws are accustomed remodel rotary movement into linear movement and the other way around. The bearing components are threaded rollers positioned between the screw and therefore the nut. The massive variety of contact points permits roller screws to support terribly high loads. The roller screw is comparable to the ball screw with the distinction that the load transfer components are threaded rollers. When put next to standard ball screws, have the subsequent advantages: the most advantage of roller screws is that they need an outsized variety of contact points to support the load with higher permissible static and dynamic load capability. Due to the larger variety of contact points the bearing perform is ensured by uniform spreading of load over the threaded rollers rather than balls just in case of ball screws. It's higher mechanics and dynamics in operating condition, generates less vibration and lower noise. The transmission exactitude of PRS is higher and may add a lot of more durable condition. Because to these compensation, a lot of analysis on roller screw has been administrated, and therefore the roller screw has been utilized in the medical, aerospace, military, assembly, Food and drink, Plastics, textiles and machine tools industries.
Electric Cars use the energy stored in a battery (or series of batteries) for vehicle propulsion. Electric motors provide a clean and safe alternative to the internal combustion engine. There are many pros and cons about electric cars. The electric vehicle is known to have faster acceleration. They produce no exhaust.
The use of manual was deemed too tedious and inert. At immense speeds, the use of a slick shift would be very tough and the drivers wont have that much time to react. Hence the use of more sophisticated and easier transmission systems have come into play. The paddle shift gearboxes are very easy to use. And with the combined strikeforce of a twin plate clutch gearbox, the gear changes are lightning fast. The use of electrohydraulics can be seen here. There is no clutch. Just a brake and a throttle pedal. The flappy paddles are located behing the steering wheel which make it easy for the driver to access it without much
...late 17th century, and beginning of the 18th century, transportation was favored by American society so much, the wealthier would hire chauffer’s to take people places. So not only did the motor produce a better and more efficient life style, it also created a huge business industry, as we know it today called, “valeting”. The actual motor worked like this. “Two cups filled with mercury would contain a magnet and a wire with one being fixed and the other free to move. Whenever a current was passed through the wire, the free moving magnet or wire would revolve around its fixed partner due to the electromagnet forces being produced.” (History of Innovation). This first motor was a prime example of the fact that movement could be created by electricity and electricity could be created by friction. This motor was the most useful and applicable invention in the 1800’s.
At the early age of nine months, a baby girl most commonly busts out her first word in two syllables: “Da-Da.” Dad. Within her first year of living, her life revolves around her father. Such is the case for Li’l Bit and Electricidad from Paula Vogel’s How I Learned to Drive and Luis Alfaro’s Electricidad, respectively. Stuck in suburban Maryland without ever meeting her biological father, the pubescent Li’l Bit fills the void by developing an emotionally-dependent and sexual relationship with her charming Uncle Peck. In contrast, Electricidad has grown up with her father throughout her life into adulthood, but she feels this bond stripped away and seeks vengeance when her mother Clemencia murders him. Although Uncle Peck is not Li’l Bit’s biological
There are two advantages to the belt drive design. The motor in a belt driven turntable is set away from the platter by means of a continuous belt loop. This minimizes vibration to the platter and thus needle skipping. Also, belt drive models tend to be much cheaper than their direct drive counter parts.
The future American commuter will undoubtedly have to transition from the use of fossil fuels to new alternatives due to the diminishing availability of the nation’s oil resources. How will America respond to this upcoming issue? It is difficult to predict which alternative fuel source America will ultimately choose, but with the premier of Nissan’s electric powered Leaf and other companies; such as Tesla Motors and Chevy, with their electric cars ready for market, the electric car may be winning the race to become the new standard for the gasoline alternative. Electric cars resolve long standing environmental issues, but it will need to maneuver around many roadblocks to become a marketable consideration for the general public. The cost of electric cars, currently on the market, makes them an impractical purchase for the average consumer. If cost is not the growing concern in today’s economy which prevents the consumer from considering this option; they may deny the technological advance due to battery storage capabilities and the inadequate infrastructure in place to refuel and provide for them.
“What we need to do is really improve energy efficiency standards, develop in full scale renewable and alternative energy and use the one resource we have in abundance, our creativity.” (Lois Capps) There are many ways we can utilize our abundance of creativity. Some have yet to be discovered, but some are being sought out today. One of these is the rise of the electric car. Despite a rough start competing with petroleum cars, electric cars will see a spark in popularity in the automotive market within the next few years with new models being developed and more charge stations being installed world wide. With more efficient ways of harvesting energy, the electric car will see more practical use and make its way into the lives of the average
As humans delve into the twenty-first century, scientific research continues at an exponentially increasing rate. While the work of researchers seems to affect people in positive ways, the common debate among the general population is whether or not there is a limit to how far scientists can take their research and impact the future of society. The changes that scientists induce upon society often escape foresight, such as diseases, dangerous paints, and other products that do not pass the test of time. One big issue that is fiercely debated is how to go about switching to alternative-fuel-source automobiles, given that the world’s supply of oil will run dry relatively soon. The electric car seems to be the best candidate as a replacement for the moment, but many people are still weary about completely discarding the trusty internal combustion engine for an invention barely as old as the people who will buy them. The electric fuel is promising, but it has not been around long enough to undergo the test of time needed for mass acceptance. Here the more direct question arises: is the electric car the solution to a more economically responsible car?
This involves relating the current supplied to the motor, motor shaft rotational speed, motor efficiency, and the power factor as a function of the load of the motor, similar to the figure on page 21 of the Lab Manual.
In a DC motor, the armature consists of any number of windings, each one an electromagnet. The armature is immersed in a directional external magnetic field. This external field does not move, and can come from permanent magnets or electromagnets.
A lot of scientists like the idea because it is advanced and they say it’s cleaner and safer in many
Cars general work with the engine turning over from the driver using their key which makes the four piston strokes start. Once that happens, it starts moving getting hot and while that is happening, it moves the transmission belt which moves the alternator, and the alternator starts generating power through kinetic energy which in turns keeps the battery powered so you don’t lose power while driving. After the engine does that then power is supplied to the various computers in the car which gets it started moving. The steering wheel is attached to a steering column and the several other parts of the steering linkage so steering is possible. The brakes have two different types on the front there can usually be disc rotors which work by the rotor being mounted on the rotor hub and held in place with the mounting bracket on the mounting bracket are brake pads which squeeze the rotor which cause the car slow down or stop. The brakes on the rear are drum brakes which are similar to disc brakes, but they have brake shoes which expand to stop or slow down the car. This is not always true though some cars just have disc brakes and some older cars have drum brakes the reason for this is because disc is more reliable than drum brakes. Of course after all that you would remove the key and it would then stop the engine and the belt from turning and then the majority of the electrical stuff turns off except for the battery.