motorintro - Cleveland State University
... can see that with S1 closed and S2 open, current will flow from right to left through the motor winding. With S1 open and S2 closed, current will flow from left to right. We can, therefore, change the direction of current flow using only two switches (instead of the four switches needed for the bipo ...
... can see that with S1 closed and S2 open, current will flow from right to left through the motor winding. With S1 open and S2 closed, current will flow from left to right. We can, therefore, change the direction of current flow using only two switches (instead of the four switches needed for the bipo ...
Behavior-Based Robotics
... recommended voltage range for best efficiency of the motor. Lower voltages will (usually) turn the motor, but will provide less power. Higher voltages are more tricky; they increase power output at the expense of the operating life of the motor ( the more you rev your car engine, the sooner it w ...
... recommended voltage range for best efficiency of the motor. Lower voltages will (usually) turn the motor, but will provide less power. Higher voltages are more tricky; they increase power output at the expense of the operating life of the motor ( the more you rev your car engine, the sooner it w ...
EV Fest Experiments
... An electric motor works by forcing the motion of a rotor using one or more switched magnetic fields. The force of the magnetic field developed by an electromagnet and hence torque of the motor is proportional to the current flowing through the motor windings. When stalled, the relationship between t ...
... An electric motor works by forcing the motion of a rotor using one or more switched magnetic fields. The force of the magnetic field developed by an electromagnet and hence torque of the motor is proportional to the current flowing through the motor windings. When stalled, the relationship between t ...
DC Motors 2
... b) The power loss due to the resistance of the armature c) The power developed d) The back EMF (EA) e) The efficiency assuming no mechanical power loss f) Draw a power conversion diagram and fill-in the values for power in, electrical power loss, power developed, mechanical power loss and power out. ...
... b) The power loss due to the resistance of the armature c) The power developed d) The back EMF (EA) e) The efficiency assuming no mechanical power loss f) Draw a power conversion diagram and fill-in the values for power in, electrical power loss, power developed, mechanical power loss and power out. ...
Chapter 17 Powerpoint
... Generators are not perfectly efficient Not all 100% of the mechanical energy is converted into electrical energy. The efficiency depends on 3 things. 1. I2*R or copper losses in the winding ...
... Generators are not perfectly efficient Not all 100% of the mechanical energy is converted into electrical energy. The efficiency depends on 3 things. 1. I2*R or copper losses in the winding ...
Slide 1
... missing parts. General neglect will be suspected if the motor is covered with dirt, oil or rust. ...
... missing parts. General neglect will be suspected if the motor is covered with dirt, oil or rust. ...
(3) and
... When dealing with small motors, transients settle quickly, and therefore, provided that the system is well behaved, it is usually the steady-state response that is important. Let the steady-state change in speed with change in load be ...
... When dealing with small motors, transients settle quickly, and therefore, provided that the system is well behaved, it is usually the steady-state response that is important. Let the steady-state change in speed with change in load be ...
UNIVERSAL MOTOR - Home
... Way, San Jose, CA 95134 “ High Performance DC Chopper Speed and Current Control of Universal Motors Using a Microcontroller” 0197-2618/07/$25.00 © 2007 IEEE [2] Hac1 Bodur, A. Faruk Bakan, M. Hadi Sarul Yildiz Technical University, Dept. of Electrical ...
... Way, San Jose, CA 95134 “ High Performance DC Chopper Speed and Current Control of Universal Motors Using a Microcontroller” 0197-2618/07/$25.00 © 2007 IEEE [2] Hac1 Bodur, A. Faruk Bakan, M. Hadi Sarul Yildiz Technical University, Dept. of Electrical ...
PDF
... The stator is directly connected to the AC mains, where as the wound rotor is fed from the Power Electronic Converters via slip rings to allow DIFG to operate at a variety of speeds in response to changing wind speed. The idea is to introduce a frequency converter between the variable frequency indu ...
... The stator is directly connected to the AC mains, where as the wound rotor is fed from the Power Electronic Converters via slip rings to allow DIFG to operate at a variety of speeds in response to changing wind speed. The idea is to introduce a frequency converter between the variable frequency indu ...
Click Here For
... Torque Equation - Expressions for Maximum Torque and Starting Torque - Torque Slip Characteristic – Load characteristics - Equivalent Circuit - Phasor Diagram - Crawling and Cogging -Circle Diagram-No Load and Blocked Rotor Tests-Predetermination of Performance. ...
... Torque Equation - Expressions for Maximum Torque and Starting Torque - Torque Slip Characteristic – Load characteristics - Equivalent Circuit - Phasor Diagram - Crawling and Cogging -Circle Diagram-No Load and Blocked Rotor Tests-Predetermination of Performance. ...
Electric generator
... an extent dependent upon the magnitude of the current, sion is perpendicular to the rotor axis, the foils being held it being therefore necessary to provide compensating speed regulating devices if it is desired to maintain a substan 30 together by rivets or other suitable fastening means. If the fe ...
... an extent dependent upon the magnitude of the current, sion is perpendicular to the rotor axis, the foils being held it being therefore necessary to provide compensating speed regulating devices if it is desired to maintain a substan 30 together by rivets or other suitable fastening means. If the fe ...
Exercises
... 1. Circle the letter beside the names of the two scientists who, in 1831, independently discovered that electric current can be produced in a wire by simply moving a magnet into or out of a wire coil. a. Einstein and Faraday b. Faraday and Henry c. Henry and Newton d. Maxwell and Newton 2. Is the fo ...
... 1. Circle the letter beside the names of the two scientists who, in 1831, independently discovered that electric current can be produced in a wire by simply moving a magnet into or out of a wire coil. a. Einstein and Faraday b. Faraday and Henry c. Henry and Newton d. Maxwell and Newton 2. Is the fo ...
File
... Atoms in a magnet are aligned according to their magnetic domains. Electromagnetic Induction is the production of a current in a conducting circuit by a change in the strength, position, or orientation in an external magnetic field. This is the reason generators and electric motors work. In an AC ge ...
... Atoms in a magnet are aligned according to their magnetic domains. Electromagnetic Induction is the production of a current in a conducting circuit by a change in the strength, position, or orientation in an external magnetic field. This is the reason generators and electric motors work. In an AC ge ...
Task 6 - Final Stakeholder Meeting
... • Reduce rotor bar skew - rotor bars are slightly skewed which helps reduce harmonics Reducing the skew will help reduce the rotor resistance and reactance, thereby providing gains in efficiency. However, care must be taken not increase harmonics. Odd harmonics, particularly the third harmonic, can ...
... • Reduce rotor bar skew - rotor bars are slightly skewed which helps reduce harmonics Reducing the skew will help reduce the rotor resistance and reactance, thereby providing gains in efficiency. However, care must be taken not increase harmonics. Odd harmonics, particularly the third harmonic, can ...
charging system
... voltages, the regulator will adjust the amount of rotor field current to control alternator output. •Electronic voltage regulator introduces more resistance between the rotor windings and battery to reduce the alternator out-put. ...
... voltages, the regulator will adjust the amount of rotor field current to control alternator output. •Electronic voltage regulator introduces more resistance between the rotor windings and battery to reduce the alternator out-put. ...
Closed Loop Control of Separately Excited DC Motor
... The variable speed, reliability and high performance are three main characteristics of an electric drive system due to which it can be easily controlled. The field of motor is connected directly to the power supply for the speed control. At the same time it is necessary for torque and speed control. ...
... The variable speed, reliability and high performance are three main characteristics of an electric drive system due to which it can be easily controlled. The field of motor is connected directly to the power supply for the speed control. At the same time it is necessary for torque and speed control. ...
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.