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AC Motors Overview
... well as single phase Pressure Washer motors. This group of specialty m includes Arbor Saw to Woodworking, Pre-1952 NEMA motors to SAE Hydraulic Pump motors. An extensive line of TEFC and ODP F-2 moto available as well in 1 Hp through 60 Hp. The Automotive Approved mo approved by major US automobile ...
... well as single phase Pressure Washer motors. This group of specialty m includes Arbor Saw to Woodworking, Pre-1952 NEMA motors to SAE Hydraulic Pump motors. An extensive line of TEFC and ODP F-2 moto available as well in 1 Hp through 60 Hp. The Automotive Approved mo approved by major US automobile ...
Sensorless Control of Doubly-Fed Induction Generators in Variable
... [2] and references therein) is increasing due to cost effectiveness/robustness, which implies that the vector controllers must operate without the information of mechanical sensors (such as position encoders or speed transducers) mounted on the shaft. The required rotor signals must be estimated via ...
... [2] and references therein) is increasing due to cost effectiveness/robustness, which implies that the vector controllers must operate without the information of mechanical sensors (such as position encoders or speed transducers) mounted on the shaft. The required rotor signals must be estimated via ...
Control of Electric Vehicle
... Hence, in recent years, there is quite a lot of researches in the exploring advanced controll strategies in electric vehicles. As the development of the high computing capability microprocessor, such as DSP (Digital Signal Processor), it is possible to perform complex control on the electric vehicle ...
... Hence, in recent years, there is quite a lot of researches in the exploring advanced controll strategies in electric vehicles. As the development of the high computing capability microprocessor, such as DSP (Digital Signal Processor), it is possible to perform complex control on the electric vehicle ...
design and real time implementation of control algorithm for
... Brushless DC (PMBLDC) motor is also referred to as an electronically commutated motor [2] . There are no brushes on the rotor and the commutation is performed electronically at certain rotor positions. The stator magnetic circuit is usually made from magnetic steel sheets. The magnetization of the p ...
... Brushless DC (PMBLDC) motor is also referred to as an electronically commutated motor [2] . There are no brushes on the rotor and the commutation is performed electronically at certain rotor positions. The stator magnetic circuit is usually made from magnetic steel sheets. The magnetization of the p ...
Hardware Design Considerations for an Efficient
... The BLDC motor is a permanent magnet motor with a trapezoidal back-EMF, as opposed to the sinusoidal back-EMF found in a permanent-magnet synchronous motor. Figure 4 shows the trapezoidal waveforms of a three-phase BLDC. In every commutation step, one phase winding is connected to a positive supply ...
... The BLDC motor is a permanent magnet motor with a trapezoidal back-EMF, as opposed to the sinusoidal back-EMF found in a permanent-magnet synchronous motor. Figure 4 shows the trapezoidal waveforms of a three-phase BLDC. In every commutation step, one phase winding is connected to a positive supply ...
SPEED CONTROL OF A PERMENANT MAGNET DIURECT
... remains relatively constant regardless of changes in required load. When this method is used, the speed of separately excited D.C motor can be controlled by varying Va and holding Vf constant at its rated value. Then when the voltage applied to the armature is raised, the armature current increases ...
... remains relatively constant regardless of changes in required load. When this method is used, the speed of separately excited D.C motor can be controlled by varying Va and holding Vf constant at its rated value. Then when the voltage applied to the armature is raised, the armature current increases ...
Design and Performance of a High Temperature Superconducting
... N IMPORTANT quality index of electric machine is the power density: it is known that axial flux machines tend to have a higher power density than the radial machines. As a result, they are used more and more in applications where the power density is a critical issue: renewable energy production[1], ...
... N IMPORTANT quality index of electric machine is the power density: it is known that axial flux machines tend to have a higher power density than the radial machines. As a result, they are used more and more in applications where the power density is a critical issue: renewable energy production[1], ...
Electrical Noise Performance of Gold-on
... Pennzane®”, i.e., without additives), NYE 2001 (with anti-wear and anti-oxidant additives), and NYE 2001XPbNp (with anti-wear, antioxidant, and lead naphthenate additives, where the X is the mass percent of the latter, typically around 3% which is used in this testing). Noise, or variations in the c ...
... Pennzane®”, i.e., without additives), NYE 2001 (with anti-wear and anti-oxidant additives), and NYE 2001XPbNp (with anti-wear, antioxidant, and lead naphthenate additives, where the X is the mass percent of the latter, typically around 3% which is used in this testing). Noise, or variations in the c ...
Problem B - Geneva Area City Schools
... output emf. Find the rms current and the maximum ac current in the circuit. 2. Some wind turbines in the United States can provide an rms current of 1.3 A. Calculate the maximum ac current. 3. In Iceland, people harness geothermal energy by placing pipes deep into the Earth in order to tap hot-water ...
... output emf. Find the rms current and the maximum ac current in the circuit. 2. Some wind turbines in the United States can provide an rms current of 1.3 A. Calculate the maximum ac current. 3. In Iceland, people harness geothermal energy by placing pipes deep into the Earth in order to tap hot-water ...
Commutator (electric)
![](https://commons.wikimedia.org/wiki/Special:FilePath/Universal_motor_commutator.jpg?width=300)
A commutator is the moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called ""brushes"" made of a soft conductor like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings (coils of wire) on the armature are connected to the commutator segments. Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit. The first direct current commutator-type machine, the dynamo, was built by Hippolyte Pixii in 1832, based on a suggestion by André-Marie Ampère. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement. Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.