Closed loop control
... • Rotor circuit, slip voltage is available across the slip rings. – This slip voltage is rectified by the 3Φ diode bridge ...
... • Rotor circuit, slip voltage is available across the slip rings. – This slip voltage is rectified by the 3Φ diode bridge ...
Microcontroller Systems ELET 3232 Topic 14: Motion Control
... It is simpler and more popular than the variable reluctance type ...
... It is simpler and more popular than the variable reluctance type ...
JV2216521658
... asynchronous start with a synchronous steady state operation. With really low copper losses at steady state ( harmonic losses only ), a better efficiency can be reached. Synchronous machines are among the three most common types of electric machines, the other two kind being dc commutator machines a ...
... asynchronous start with a synchronous steady state operation. With really low copper losses at steady state ( harmonic losses only ), a better efficiency can be reached. Synchronous machines are among the three most common types of electric machines, the other two kind being dc commutator machines a ...
Speed control of DC motors
... needs to be controlled. Such applications are encountered frequently in our daily lives such as controlling the speed of fans or controlling the speed of hand-held tools such as drills, and in industrial automation applications such as controlling the speed of conveyor belts. ...
... needs to be controlled. Such applications are encountered frequently in our daily lives such as controlling the speed of fans or controlling the speed of hand-held tools such as drills, and in industrial automation applications such as controlling the speed of conveyor belts. ...
AN885
... be replaced by newer types when the cost of the necessary electronic control systems drops to sufficiently low levels. – Induction (Brushless) Motors are mainly used in applications requiring silent operation, long life and high safety levels (i.e. pumps, compressors, refrigerators, fans, etc.). The ...
... be replaced by newer types when the cost of the necessary electronic control systems drops to sufficiently low levels. – Induction (Brushless) Motors are mainly used in applications requiring silent operation, long life and high safety levels (i.e. pumps, compressors, refrigerators, fans, etc.). The ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... suitable for variable speed application because inverter is essential. SRM is a doubly salient machine because both the stator and rotor have salient poles. Flux is created by concentrated stator winding only. There are no permanent magnets, commutators, and windings in rotor side. So, SRM has simpl ...
... suitable for variable speed application because inverter is essential. SRM is a doubly salient machine because both the stator and rotor have salient poles. Flux is created by concentrated stator winding only. There are no permanent magnets, commutators, and windings in rotor side. So, SRM has simpl ...
Motor-Starting Sags
... starting torque vary with the square of the voltage applied to the motor, so the 50 percent tap will deliver only 25 percent of the full-voltage starting current and torque. The lowest tap which will supply the required starting torque is selected. Resistance and reactance starters initially insert ...
... starting torque vary with the square of the voltage applied to the motor, so the 50 percent tap will deliver only 25 percent of the full-voltage starting current and torque. The lowest tap which will supply the required starting torque is selected. Resistance and reactance starters initially insert ...
Basic Direct Current Generators and Motors
... The variable resistor shown can then be used to regulate the amount of current in the field and hence the voltage produced. The above is of course, a much simplified situation, inasmuch that the rotor only has one coil and two brushes. The next step would be to add a second pair of coils situated at ...
... The variable resistor shown can then be used to regulate the amount of current in the field and hence the voltage produced. The above is of course, a much simplified situation, inasmuch that the rotor only has one coil and two brushes. The next step would be to add a second pair of coils situated at ...
Motor Technologies
... increase in R, which results in further losses and heating. This process can destroy the motor if the maximum current is not limited. Furthermore, at higher temperatures, the field magnets begin to lose their strength. Hence, for a required torque output the current requirement becomes greater. Brus ...
... increase in R, which results in further losses and heating. This process can destroy the motor if the maximum current is not limited. Furthermore, at higher temperatures, the field magnets begin to lose their strength. Hence, for a required torque output the current requirement becomes greater. Brus ...
IES PE Short Course
... Fact: Salient pole rotors are cheaper to build than smooth. Do hydro-turbine generators have salient poles or smooth? ...
... Fact: Salient pole rotors are cheaper to build than smooth. Do hydro-turbine generators have salient poles or smooth? ...
PLL Based Slip Frequency Control System for Improving Stability of
... domestic and industrial machinery. The popularity of the induction motors due to its ruggedness and operational reliability. Several methodologies have been proposed to control the induction motor varying in complexity, performance and cost. The weakness of mechanical speed sensors, the maintenance ...
... domestic and industrial machinery. The popularity of the induction motors due to its ruggedness and operational reliability. Several methodologies have been proposed to control the induction motor varying in complexity, performance and cost. The weakness of mechanical speed sensors, the maintenance ...
EE 410/510: Electromechanical Systems Chapter 5
... Pulse width modulation is the primary means for induction motor control. Uses an inverter to supply fixed step voltages based Uses an inverter to supply fixed step voltages based over the current motor phases The additional applied voltage sums with the individual 3‐phase voltages to provide disc ...
... Pulse width modulation is the primary means for induction motor control. Uses an inverter to supply fixed step voltages based Uses an inverter to supply fixed step voltages based over the current motor phases The additional applied voltage sums with the individual 3‐phase voltages to provide disc ...
R a
... in steel rolling mills that require sudden torque increase. •Compensating windings put on pole faces can effectively negate the effect of AR. These windings are connected in series with armature winding. ...
... in steel rolling mills that require sudden torque increase. •Compensating windings put on pole faces can effectively negate the effect of AR. These windings are connected in series with armature winding. ...
DC Motor
... in steel rolling mills that require sudden torque increase. •Compensating windings put on pole faces can effectively negate the effect of AR. These windings are connected in series with armature winding. ...
... in steel rolling mills that require sudden torque increase. •Compensating windings put on pole faces can effectively negate the effect of AR. These windings are connected in series with armature winding. ...
DC Motor
... in steel rolling mills that require sudden torque increase. •Compensating windings put on pole faces can effectively negate the effect of AR. These windings are connected in series with armature winding. ...
... in steel rolling mills that require sudden torque increase. •Compensating windings put on pole faces can effectively negate the effect of AR. These windings are connected in series with armature winding. ...
High Voltage Induction Motors
... on many offshore platforms and FPSO’s, where the power generation is limited and in onshore facilities fed from low capacity lines. Use of DOL low starting current designs can provide a cost-effective solution, removing the need for expensive electronic variable frequency starters or other forms of ...
... on many offshore platforms and FPSO’s, where the power generation is limited and in onshore facilities fed from low capacity lines. Use of DOL low starting current designs can provide a cost-effective solution, removing the need for expensive electronic variable frequency starters or other forms of ...
Electric motor
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.