Introduction: The brushless DC motor is a very common and unique piece of machinery that we take advantage of in everyday life. For example the Brushless DC motor is commonly found in computers. This essay will prove how a brushless DC motor works, its advantage and disadvantages also the difference between a brushless DC motor and a brushed DC motor. Throughout this essay multiple physics concepts and equations will be discussed.
Motor Effect: To summarise the motor effect it is the idea that the force caused by current flowing through a wire and causing a magnetic field around it. When this created magnetic field interacts with a magnetic field from a fixed magnet, it causes a force which moves the wire in relation to the right hand…
Brushless DC Motor Physics Report.
Motor: A machine powered by electrical current or the explosion of gases inside chambers that will provide movement for a vehicle.
When an electric current, magnetic field or external force acts on a coil found inside of the motor, it will provide force to it, thus causing the coil to move, the coil rotates on a half turn basis otherwise the motor is forced to stop and will not move.
The Motor Effect
Motor effect refers to a current carrying…
Business-to-Business Orthopedic Motor Market
generated approximately 33% of its dollar revenue from this segment (see Exhibits 1A and 1B) and
held a 19% share of the market in this segment.
Segment B placed a premium on the motor’s thermal resistance performance and also highly valued
the market and technical knowledge of a manufacturer’s sales representatives. This segment
represented just under 8% of the company’s revenue and MM’s market share in this segment was 4%.
A high thermal…
Direct Current (DC) motors
A Direct Current (DC) motor is one of the broader classification of electric motors which operate from a direct current. Nearly all mechanical devices applied in daily life activities are powered by electric motors. Motors transform electrical energy to mechanical energy, hence they are essential for energy conversions in electrical machines.
All types of electrical motors are made up of a stationary field referred to a stator and…
A skid steer loader is a versatile machine, and a must have for anyone in landscaping, large-scale construction, farming, or logging. It has a rigid frame and lift arms you can attach various tools and skid steer loader attachments to. Loaders may be track-equipped or four-wheel drive.
The drive system of the loader has no transmission. Instead, it uses pumps and hydraulic motors to power the wheels or tracks. Wheels can drive independently of each other, which makes them very maneuverable.…
Mechanical power is defined as torque and RPM (rotation per minute) and electric power is defined as current and voltage. Therefore, in order convert mechanical power into electric power, torque shall be converted into current and rpm shall be changed into voltage. The relation between the rpm and voltage can be defined with equations with the use of Equations.
When there is a decrease in value in equations there is an increase in efficiency of power generator. In here, there is no loss when …
The joints had to be such that they can be loosened and tightened at any required configuration, this obstacle was overcome by the use of wing nut at the end of the screw instead of a normal nut, and the image below shows the wing nut and bolt.
This is the most cost effective yet strong way of locking the joints compared to knobs and other clamp mechanisms.
For the Robot Arm Construction our group members had a variety of materials to choose from, these materials…
they pass through the nozzle. Each nozzle converts heat and pressure energy into velocity energy by controlling the expansion of the gas. Each small nozzle has a convergent area.
Each stage of the turbine is larger than the preceding one. The pressure energy drops are quite rapid; consequently, each stage must be larger to use the energy of a lower pressure, lower temperature, and larger volume of gases. If more stages are used, the rate of divergence will be less.
The turbine motor area must…
Motor & Gearbox
The mirrors are required to rotate specific angles. To be able to achieve specific angles we need a stepper motor. The stepper motor is known to divide one revolution into equal steps which is our main requirements for the rotation of the mirrors.
Figure 2-13: The Stepper Motor
The following table shows the stepper motor specifications:
Table 2-1: Stepper Motor Specifications
Current 4.2 A
Torque 8.34 N.m
The desired torque calculated to withstand the mirror…
function of the linear DC Motor model has to be obtained. Actually in our case, the input of the plant is current so the transfer function of the mathematical model in ratio of angular velocity to current has to be obtained. It is given by:
G(s)=Ω_1/I_a =R_A/K_M 1/(T_e s+1)
where T_e=(J_meq R_A)/(K_m Cϕ) is electro-mechanical time constant.
The feed forward control could be determined using equation G_F=G^(-1)(2.64) as follows:
G_F (s)=K_M/R_A (T_e s+1)/(T_o s+1)
It can be clearly seen…