The Brushless Dc Motor, By Lawal Adedayo Kehinde

The first time using a large windmill to use electricity was in Cleveland, Ohio in 1888 invented by Charles F. Brush. The Brush machine was a post mill with a multiple blade picket fence rotor 17 meters in diameter, featuring a large tail hinged to turn the rotor out of the wind. It was the first windmill to incorporate a step up gearbox in order to turn a direct current generator at its required operational speed. In 1891, the Dane Poul La Cour developed the first electrical output wind machine to incorporate the aerodynamic design principles used in the best European tower mills. By

For the car savvy drivers, electric motors develop their highest torque from zero rpms—meaning fast (and silent) zero-to-60 acceleration times. This means they snap to life at the touch of the accelerator. It does 0–60 mph in 3.7 seconds, making electric cars the fastest cars in the world. Electric cars can be direct drive, so there’s no transmission or complex gearbox. Power is applied smoothly and quietly. Acceleration is effortless.

The equivalent electrical circuit of a dc motor is shown in figure 5.2. It can be represented by a voltage source (Va) across the coil of the armature. The electrical equivalent of the armature coil can be described by an inductance (La) in series with a resistance (Ra) in series with an induced voltage (Vc) which

The first fundamental part needed in an electric vehicle is the electric motor. To put it simply, the job of the electric motor is to propel the car. Unlike a typical combustion engine, which has hundreds of moving parts, an electric motor only has one moving part [4]. The positives of this include a much lower initial cost compared to a fossil-fuel engine with the same horsepower. Having fewer moving parts also means that the motor has a longer lifespan.

Using an electric motor, an experiment was performed to test the efficiency of the motor when the mass being lifted was increased in increments of ten grams. As the mass increased by each increment of ten grams, the motor efficiency decreased by an average of 7.439%. Our results were found by using the equation: efficiency=gain in potential differenceelectrical energy used Therefore, this inverse relationship proved mass affects the efficiency of electric motors.

Electric cars possess less moving parts; for this reason, they have fewer maintenance requirements and expenses. Without a doubt;

Brushless motors are a bit similar to normal DC motors in the way that coils and magnets are used to drive the shaft. Though the brushless motors do not have a brush on the shaft which takes care of switching the power direction in the coils, and this is why they are called brushless. Instead the brushless motors have three coils on the inner (center) of the motor, which is fixed to the mounting. On the outer side it contains a number of magnets mounted to a cylinder that is attached to the rotating shaft. So the coils are fixed which means wires can go directly to them and therefor there is no need for a brush. The reason why QuadCopters use brushless motors instead of normal DC motors is the much higher speeds and less power usage for the same speed. The brushless motors are more efficient as there is no power lost as there is in the brush-transition on the DC motors. Usually rated with a KV rating (revolutions per volt). This is not equivalent to torque, but lower KV motors are usually used for larger

The electric motors work by electricity and magnets working together. Once the electricity gets going, the magnets take over. The magnets keep the motor going because the magnets used in motors have both positive and negative magnets on both sides. Surrounding the magnetic ends, are one positive and one negative magnet. This means that at any

The three phase induction motor is considered the mostly used electrical motor in all the industrial applications. The three phase induction motors are considered good because of their simplicity, rigidity, cheapness, easily maintained and could be made up with features that are suitable for most industrial requirements.

Electric cars are becoming very popular in today’s world and are becoming more main stream. One reason for this is the need for automobiles that have a lower or a zero carbon footprint. For the majority of the history of the automobile, the propulsion system was a gas or a diesel engine that would run off of fossil fuels. The burning of fossil fuels is very hazardous to our world and also creates much toxic pollution. However, electric cars run off of electricity, which is a very clean and pollution free resource, depending on how the electricity was produced of course. In this paper we are going to examine the history of electric cars, look into modern electric car technology, and peer into the future of electric car technology to see if EVs might be the answer to dramatically reducing our global pollution.

The economical driving and repair expenditure of an electric powered scooter is merely one of its useful benefits. Making use of high performance battery power instead of expensive gas can reduce travel expenditures enormously. In addition, high performance batteries have fewer problems than gasoline powered engines and therefore very seldom need repair. These hi-tech batteries are extremely long-lasting and dependable and will tolerate a great number of recharges.

Reduced Noise Pollution: Electric motors are capable of providing smooth drive with higher acceleration over longer distance.

In today’s motorized life , It’s difficult to live without motor (Engines) and the main source of it’s input power is fossil fuels & partly electric power. In future these fuels or electricity may not be available widely as they are non renewable energies. So, it may be difficult to use engine with the fuels.

You can build a simple motor with magnet, wire, jumbo paper clips, sandpaper, neodymium magnets, and a compass. There are motors all over the place in your house. You use electric motors in your everyday life. When you connect the wires and connect it completes the current and makes the motor start. The copper wire will start to spin when the current is completed. I am build a simple motor and see if it spins slower or faster with bigger and smaller batteries I think it will spin faster with bigger batteries.

Based on the modelling of SRM magnetic circuit, three models of SRM are found in literature: linear model, nonlinear model without mutual inductances, and nonlinear model with mutual inductances. Linear models in [6,7] are designed and simulated readily. On contrast nonlinear models are obtained after a large set of experimental tests to obtain the magnetic characteristics [8-15], or from a finite element method (FEM) analysis [16-18], which takes into consideration the saturation of rotor and stator materials. The nonlinear model is preferable when accurate precision is wanted. The converter used with SRM requires at least one switch per phase due to unidirectional phase current. This is a big advantage when compared to the converters for AC motor drives. Some configurations of converters used in SRM drives are presented in [19-22]. The half-bridge asymmetric converter is the most widely used for SRM drive applications, because of its high