AN2372
... BLDC motors are the workhorses in most light industrial applications. In some cases, Halleffect position sensors are used to simplify control logics for controlling these motors. BLDC motors, by the nature of currents through them, are somewhat noisy and a little less efficient. These disadvantages ...
... BLDC motors are the workhorses in most light industrial applications. In some cases, Halleffect position sensors are used to simplify control logics for controlling these motors. BLDC motors, by the nature of currents through them, are somewhat noisy and a little less efficient. These disadvantages ...
EE-0903478-Electrical Machines Laboratory-April-2015
... test & Blocked-rotor test, Equivalent circuit parameters evaluation, Torque-Speed characteristics of 3-phase induction motors, Speed control of 3-phase induction motors Synchronous motors: Starting of synchronous motors, Load test and torque-power angle characteristics, Vcurve and power factor corre ...
... test & Blocked-rotor test, Equivalent circuit parameters evaluation, Torque-Speed characteristics of 3-phase induction motors, Speed control of 3-phase induction motors Synchronous motors: Starting of synchronous motors, Load test and torque-power angle characteristics, Vcurve and power factor corre ...
U3e L8 Electricity and Magnetism 1
... electromagnetism. To use principles of electromagnetism to produce a mechanical result. ...
... electromagnetism. To use principles of electromagnetism to produce a mechanical result. ...
UNIT – 5 Explain the different starting methods for 3
... Slip-ring motors are invariably started by rotor resistance starting. In this method, a variable star-connected rheostat is connected in the rotor circuit through slip rings and full voltage is applied to the stator winding as shown in Fig. ...
... Slip-ring motors are invariably started by rotor resistance starting. In this method, a variable star-connected rheostat is connected in the rotor circuit through slip rings and full voltage is applied to the stator winding as shown in Fig. ...
幻灯片 1
... (a) Series: highest starting torque and greatest no-load speed. (b) shunt: lowest starting torque, a much lower no-load speed and has good speed regulation. (c) compound: high starting torque and good speed regulation. (d) separate:a special case of the shunt wound motor and ease to revert the dire ...
... (a) Series: highest starting torque and greatest no-load speed. (b) shunt: lowest starting torque, a much lower no-load speed and has good speed regulation. (c) compound: high starting torque and good speed regulation. (d) separate:a special case of the shunt wound motor and ease to revert the dire ...
Electromagnetic Bomb
... EMPs produced by nuclear weapons with ever diminishing intensity, have changing magnetic fields which couple with electrical circuitry to produce damge currents/voltage surges. ...
... EMPs produced by nuclear weapons with ever diminishing intensity, have changing magnetic fields which couple with electrical circuitry to produce damge currents/voltage surges. ...
electrical engineering technology emt 113/4
... Wound rotor has a complete set of three-phase winding that are mirror images of the winding on the stator. - The three phases of the rotor windings are usually Y-connected, the end of the three rotor wires are tied to slip ring on the rotor shaft. - Rotor windings are shorted through brushes ridi ...
... Wound rotor has a complete set of three-phase winding that are mirror images of the winding on the stator. - The three phases of the rotor windings are usually Y-connected, the end of the three rotor wires are tied to slip ring on the rotor shaft. - Rotor windings are shorted through brushes ridi ...
Intro to Orchestral Conducting
... AC Motors Synchronous and Induction (Asynchronous) Synchronous: rotor rotation frequency = AC current frequency ...
... AC Motors Synchronous and Induction (Asynchronous) Synchronous: rotor rotation frequency = AC current frequency ...
Electromagnetic Induction Study Guide
... generated by electromagnetic induction? b) If the resistance in the bell circuit that is connected to the solenoid is 5 , how large and in what direction is the current flowing through it? 2. A magnet is pulled away from a 2 cm radius, 7 coil solenoid at a rate of 4 cm/s. While the magnet moves 7.5 ...
... generated by electromagnetic induction? b) If the resistance in the bell circuit that is connected to the solenoid is 5 , how large and in what direction is the current flowing through it? 2. A magnet is pulled away from a 2 cm radius, 7 coil solenoid at a rate of 4 cm/s. While the magnet moves 7.5 ...
Electromechanical systems
... • Spring return • Examples include valves and switches, like a car starter ...
... • Spring return • Examples include valves and switches, like a car starter ...
Tachogenerator PDF document
... Good mechanical protection – versatility in application 8 pole Alnico magnet rotor for low ripple output A4 stator mounting format – simple to fit Largely unaffected by moisture and dirt 5 year guarantee ...
... Good mechanical protection – versatility in application 8 pole Alnico magnet rotor for low ripple output A4 stator mounting format – simple to fit Largely unaffected by moisture and dirt 5 year guarantee ...
EE 1403743
... promisingly used. Multiphase motors have high power density, high efficiency, reduced torque pulsation, these features are suitable for modern electric drive applications which are energy efficient in variable speed operation under weight and volume control [1]. The additional degrees of freedom in ...
... promisingly used. Multiphase motors have high power density, high efficiency, reduced torque pulsation, these features are suitable for modern electric drive applications which are energy efficient in variable speed operation under weight and volume control [1]. The additional degrees of freedom in ...
25741_ENERGY_CONVERSION_21
... INTRODUCTION • The same physical dc machine can operate as either motor or a generator & it depends on direction of power flow • Introduction to DC motors: • dc motors have a significant fraction of machinery purchased each year through 1960s • Reasons: existence of dc power system in cars, trucks a ...
... INTRODUCTION • The same physical dc machine can operate as either motor or a generator & it depends on direction of power flow • Introduction to DC motors: • dc motors have a significant fraction of machinery purchased each year through 1960s • Reasons: existence of dc power system in cars, trucks a ...
chapter 3 - Portal UniMAP
... rotor current and the rotor magnetic field is induced in the rotor windings rather than physically connected by wires, Figure 3.7. No dc field current is required to run the machine. Induction machine are cheap to manufacture, rugged and reliable and find their way in most possible applications. ...
... rotor current and the rotor magnetic field is induced in the rotor windings rather than physically connected by wires, Figure 3.7. No dc field current is required to run the machine. Induction machine are cheap to manufacture, rugged and reliable and find their way in most possible applications. ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.