Instrumentation and Measurement Techniques
... A transformer: is a device that converts ac electrical energy at one voltage level to ac electrical energy at another voltage level, but with the same frequency. In general, transformers operate on the same principles as generators and motors, and are usually studied together with generators and mot ...
... A transformer: is a device that converts ac electrical energy at one voltage level to ac electrical energy at another voltage level, but with the same frequency. In general, transformers operate on the same principles as generators and motors, and are usually studied together with generators and mot ...
Analysing simple electric motors in the classroom - Physics
... map and sketch magnetic fields from permanent magnets. In a similar fashion, students should have mapped magnetic fields created by a currentcarrying wire to connect electrical current to magnetism. Using suspended iron filings, a ferrofluid or several compasses, students will map the area surroundi ...
... map and sketch magnetic fields from permanent magnets. In a similar fashion, students should have mapped magnetic fields created by a currentcarrying wire to connect electrical current to magnetism. Using suspended iron filings, a ferrofluid or several compasses, students will map the area surroundi ...
$doc.title
... Constructional features, analysis, modeling, and applications of three phase transformers, synchronous machines, and single phase induction motors; Principle of operation of special motors. ...
... Constructional features, analysis, modeling, and applications of three phase transformers, synchronous machines, and single phase induction motors; Principle of operation of special motors. ...
Electricity and Magnetism Web Quest
... Watch the video (optional), read the page information then click “Next” Read “Inside an Electric Motor” and complete the following. 10. What does a motor use to create motion? ...
... Watch the video (optional), read the page information then click “Next” Read “Inside an Electric Motor” and complete the following. 10. What does a motor use to create motion? ...
Motor Control
... This section provides a basic understanding of how resistors are used for motor control, and the information required to design a resistor configuration. To order a resistor assembly, simply obtain the data needed for your motor type and call the factory. Our engineers will design a package that bes ...
... This section provides a basic understanding of how resistors are used for motor control, and the information required to design a resistor configuration. To order a resistor assembly, simply obtain the data needed for your motor type and call the factory. Our engineers will design a package that bes ...
Motors use electromagnets.
... motor. Although they may look different from each other, all motors have similar parts and work in a similar way. The main parts of an electrical motor include a voltage source, a shaft, an electromagnet, and at least one additional magnet. The shaft of the motor turns other parts of the device. Rec ...
... motor. Although they may look different from each other, all motors have similar parts and work in a similar way. The main parts of an electrical motor include a voltage source, a shaft, an electromagnet, and at least one additional magnet. The shaft of the motor turns other parts of the device. Rec ...
AC GUI Stand Alone
... Other 3-phase induction motor If we choose other motor we must set: • The number of poles pair (1 or 2) • The (eventually) tachometer periods per revolution ...
... Other 3-phase induction motor If we choose other motor we must set: • The number of poles pair (1 or 2) • The (eventually) tachometer periods per revolution ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... SPWM technique converts the sine wave into small number of pulses which have different width. It produces pulsating waves in which the width of pulses change according to the amplitude of sine wave voltage. For example, the amplitude of voltage is minimum at the start of sine wave at 0 degree and th ...
... SPWM technique converts the sine wave into small number of pulses which have different width. It produces pulsating waves in which the width of pulses change according to the amplitude of sine wave voltage. For example, the amplitude of voltage is minimum at the start of sine wave at 0 degree and th ...
Elec467 Power Machines & Transformers
... DC generator equivalent circuit In this schematic the field windings are shown connected to an electrical source. Thus in addition to the prime mover the generator needs a power source for the field windings. Ra and Rf are the DC resistance of the coils. Ea is the output DC voltage fed to the load ...
... DC generator equivalent circuit In this schematic the field windings are shown connected to an electrical source. Thus in addition to the prime mover the generator needs a power source for the field windings. Ra and Rf are the DC resistance of the coils. Ea is the output DC voltage fed to the load ...
Final Control Element
... high-current power source from a remote device. Normally-closed contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive. It is also called Form B contact or "break" contact. Form B contact is ideal for applications that require the circuit to ...
... high-current power source from a remote device. Normally-closed contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive. It is also called Form B contact or "break" contact. Form B contact is ideal for applications that require the circuit to ...
Electrical System
... conductors. A changing current in the first circuit (the primary) creates a changing magnetic field. This changing magnetic field induces a changing voltage in the second circuit (the secondary). This effect is called mutual induction. ...
... conductors. A changing current in the first circuit (the primary) creates a changing magnetic field. This changing magnetic field induces a changing voltage in the second circuit (the secondary). This effect is called mutual induction. ...
Lecture Notes EEE 360
... • The direct current (dc) machine can be used as a motor or as a generator. • DC Machine is most often used for a motor. • The major advantages of dc machines are the easy speed and torque regulation. • However, their application is limited to mills, mines and trains. As examples, trolleys and under ...
... • The direct current (dc) machine can be used as a motor or as a generator. • DC Machine is most often used for a motor. • The major advantages of dc machines are the easy speed and torque regulation. • However, their application is limited to mills, mines and trains. As examples, trolleys and under ...
ENERGY EFFICIENT INDUCTION MOTORS
... A large fraction of electrical energy consumed in many facilities is used to run electric motors. Nationally, motor driven systems account for about 57% of all electrical energy use. The electric motor manufacturers are seeking methods for improving the motor efficiencies, which resulted in a new ge ...
... A large fraction of electrical energy consumed in many facilities is used to run electric motors. Nationally, motor driven systems account for about 57% of all electrical energy use. The electric motor manufacturers are seeking methods for improving the motor efficiencies, which resulted in a new ge ...
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.