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Techforum Newsletter August 2011
... consumed by electric motors in fixed-speed centrifugal pump, fan and compressor applications and VFDs' global market penetration for all applications is still relatively small. This highlights especially significant energy efficiency improvement opportunities for retrofitted and new VFD installation ...
... consumed by electric motors in fixed-speed centrifugal pump, fan and compressor applications and VFDs' global market penetration for all applications is still relatively small. This highlights especially significant energy efficiency improvement opportunities for retrofitted and new VFD installation ...
Experience with On line PD Measurements on By James Cowling Martec
... • Stator Winding RTD’s • RFCT’s ...
... • Stator Winding RTD’s • RFCT’s ...
Actuators for Robots
... handle short bursts of very high current, which can be many times greater than the continuous current requirements. Another key characteristic of the brushed servo motor is a high torque ...
... handle short bursts of very high current, which can be many times greater than the continuous current requirements. Another key characteristic of the brushed servo motor is a high torque ...
Simple electrical engineering projects
... • How can you do this? One way is to use the inertia of the rotor to keep the rotor spinning, and feed current pulses to the electromagnet. There are many ways of doing this, all based on detecting when the rotor is at the right point for the electromagnet to attract it to the next position. • It’s ...
... • How can you do this? One way is to use the inertia of the rotor to keep the rotor spinning, and feed current pulses to the electromagnet. There are many ways of doing this, all based on detecting when the rotor is at the right point for the electromagnet to attract it to the next position. • It’s ...
Just What Is A Service Factor?
... This is a question we regularly receive on the Hotline. Understanding how the service factor affects an electric motor can be confusing, but it is not as complicated as it may seem. This guide should help explain the term service factor and its relationship to Boat Hoist and Lift motors. The Nationa ...
... This is a question we regularly receive on the Hotline. Understanding how the service factor affects an electric motor can be confusing, but it is not as complicated as it may seem. This guide should help explain the term service factor and its relationship to Boat Hoist and Lift motors. The Nationa ...
Magnetism and its uses
... • Remember that all conducting materials have some resistance to electron flow and thus electricity moving through the conductor is lost as heat. Also as the temperature rises, the resistance rises and more current is lost. A material that has no electrical resistance is called a superconductor. • I ...
... • Remember that all conducting materials have some resistance to electron flow and thus electricity moving through the conductor is lost as heat. Also as the temperature rises, the resistance rises and more current is lost. A material that has no electrical resistance is called a superconductor. • I ...
apt™ Modular Stepper Motor Driver Rack System See
... is increased as it is decreased in another, the new rotor position is somewhere between the two coils and the step size is a defined fraction of a full step (microstep). When used with the apt™ motor controller, the smallest angular adjustment is 0.014 degrees, resulting in a resolution of 25,600 mi ...
... is increased as it is decreased in another, the new rotor position is somewhere between the two coils and the step size is a defined fraction of a full step (microstep). When used with the apt™ motor controller, the smallest angular adjustment is 0.014 degrees, resulting in a resolution of 25,600 mi ...
112 Time-Current Curve A graph showing how long before a circuit
... From this site the complete text of all STEP 2000 courses can be downloaded in PDF format. These files contain the most recent changes and updates to the STEP 2000 courses. A unique feature of the quickSTEP site is our pictorial glossary. The pictorial glossary can be accessed from anywhere within a ...
... From this site the complete text of all STEP 2000 courses can be downloaded in PDF format. These files contain the most recent changes and updates to the STEP 2000 courses. A unique feature of the quickSTEP site is our pictorial glossary. The pictorial glossary can be accessed from anywhere within a ...
Specifier Guide - Baldor - Baldor Electric Company, a leader in
... For high-volume applications, extensive testing is practical to select the motor best suited for an application by taking advantage of special electrical or mechanical designs. However, in many applications, because of volume, cost, or expediency, it is desirable to use motors that are available fro ...
... For high-volume applications, extensive testing is practical to select the motor best suited for an application by taking advantage of special electrical or mechanical designs. However, in many applications, because of volume, cost, or expediency, it is desirable to use motors that are available fro ...
Back EMF in a Motor
... In this example, emphasis was placed on the motor operating at full speed. In fact, the back EMF varies directly with the frequency of rotation, so that if the armature is rotating at less than full speed, Vback decreases. This causes less overall resistance in the circuit, so that the current will ...
... In this example, emphasis was placed on the motor operating at full speed. In fact, the back EMF varies directly with the frequency of rotation, so that if the armature is rotating at less than full speed, Vback decreases. This causes less overall resistance in the circuit, so that the current will ...
10 Application Information
... resting times or repeatable operation at different loads and/or speeds. Efficiency – Ratio of power output to power input indicated as a percentage. In motors, it is the effectiveness with which a motor converts electrical power into mechanical power. Frequency – Number of cycles per second of alter ...
... resting times or repeatable operation at different loads and/or speeds. Efficiency – Ratio of power output to power input indicated as a percentage. In motors, it is the effectiveness with which a motor converts electrical power into mechanical power. Frequency – Number of cycles per second of alter ...
ATS48_AO Analog output assigment calculation
... ATS48 AO Analog output assigment calculation & scale ...
... ATS48 AO Analog output assigment calculation & scale ...
Fundamentals of Linear Electronics Integrated & Discrete
... Rotor matches rotating magnetic field of stator. ...
... Rotor matches rotating magnetic field of stator. ...
working of schrage motor
... Ej is reversed relative to E2. i.e. β=00 & sE2 must also be reversed. Same occurring only because ‘s’ becoming negative . i.e. The speed is thus above synchronous speed. Nr > NS . The commutator provides maximum voltage when the brushes are separated by One pole pitch. i.e. ‘θ’ = 1800 E. DEE_JRN ...
... Ej is reversed relative to E2. i.e. β=00 & sE2 must also be reversed. Same occurring only because ‘s’ becoming negative . i.e. The speed is thus above synchronous speed. Nr > NS . The commutator provides maximum voltage when the brushes are separated by One pole pitch. i.e. ‘θ’ = 1800 E. DEE_JRN ...
STMICROELECTRONICS’ MOTOR CONTROL ECOSYSTEM FEATURING STM32F30X AND L6230
... On top of the computational power achieved by the improved core, new analog peripherals have been added to reduce the workload of the CPU and to reduce the number of external components required by the application. Into the product have been embedded four PGA (programmable gain amplifiers) directly ...
... On top of the computational power achieved by the improved core, new analog peripherals have been added to reduce the workload of the CPU and to reduce the number of external components required by the application. Into the product have been embedded four PGA (programmable gain amplifiers) directly ...
Circle Diagram for Three Phase Induction Motors
... 4. Draw the perpendicular bisector to AS to meet the horizontal line AB at C. 5. With C as centre, draw a semi circle passing through A and S. This forms the circle diagram which is the locus of the input current. 6. From point S, draw a vertical line SL to meet the line AB. 7. Fix the point K as be ...
... 4. Draw the perpendicular bisector to AS to meet the horizontal line AB at C. 5. With C as centre, draw a semi circle passing through A and S. This forms the circle diagram which is the locus of the input current. 6. From point S, draw a vertical line SL to meet the line AB. 7. Fix the point K as be ...
Electric motor
![](https://commons.wikimedia.org/wiki/Special:FilePath/Motors01CJC.jpg?width=300)
An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this would be the conversion of mechanical energy into electrical energy and is done by an electric generator.In normal motoring mode, most electric motors operate through the interaction between an electric motor's magnetic field and winding currents to generate force within the motor. In certain applications, such as in the transportation industry with traction motors, electric motors can operate in both motoring and generating or braking modes to also produce electrical energy from mechanical energy.Found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives, electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as from the power grid, inverters or generators. Small motors may be found in electric watches. General-purpose motors with highly standardized dimensions and characteristics provide convenient mechanical power for industrial use. The largest of electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors may be classified by electric power source type, internal construction, application, type of motion output, and so on.Electric motors are used to produce linear or rotary force (torque), and should be distinguished from devices such as magnetic solenoids and loudspeakers that convert electricity into motion but do not generate usable mechanical powers, which are respectively referred to as actuators and transducers.