ppt - MakeItOrTakeIt
... Opto-couplers are made up of a LED and a light sensitive device, all wrapped up in one package ...
... Opto-couplers are made up of a LED and a light sensitive device, all wrapped up in one package ...
Motor Control
... In squirrel cage motors, the conductors in the rotor slots are shorted at the ends. Therefore, the resistance of the conductors is fixed and cannot be changed. However, resistors can be connected in-line with the motor to reduce the starting voltage. During the acceleration period at the moment a mo ...
... In squirrel cage motors, the conductors in the rotor slots are shorted at the ends. Therefore, the resistance of the conductors is fixed and cannot be changed. However, resistors can be connected in-line with the motor to reduce the starting voltage. During the acceleration period at the moment a mo ...
1 - Portal UniMAP
... Find and sketch the equivalent circuit of the transformer referred to low-voltage side. ...
... Find and sketch the equivalent circuit of the transformer referred to low-voltage side. ...
Handout for ALTIVAR 18 AC Drives
... 150% full load torque down to 3 Hz 100% full load torque down to 1 Hz • Constant torque, V/Hz control • Variable torque, V/Hz control • Energy savings mode: optimizes output power by automatic adjustment of motor magnetization to match load requirements. Wide functionality • Configurable I/O: allows ...
... 150% full load torque down to 3 Hz 100% full load torque down to 1 Hz • Constant torque, V/Hz control • Variable torque, V/Hz control • Energy savings mode: optimizes output power by automatic adjustment of motor magnetization to match load requirements. Wide functionality • Configurable I/O: allows ...
Sample Exam Solution
... • In the first 3 cases, the best solution would be to start the using an external field and use contacts or switches to transfer it to a shunt self excited connection after the flux had built u sufficiently. This could be accomplished with a relatively small dc supply. • If the generator must supply ...
... • In the first 3 cases, the best solution would be to start the using an external field and use contacts or switches to transfer it to a shunt self excited connection after the flux had built u sufficiently. This could be accomplished with a relatively small dc supply. • If the generator must supply ...
electrical machines two marks
... The core is constructed by sheet steel laminations assembled to provide a continuous magnetic path with minimum of air gap included. The steel used is of high silicon content sometimes heat treated to produce a high permeability and a low hysteresis loss at the usual operating flux densities. The ed ...
... The core is constructed by sheet steel laminations assembled to provide a continuous magnetic path with minimum of air gap included. The steel used is of high silicon content sometimes heat treated to produce a high permeability and a low hysteresis loss at the usual operating flux densities. The ed ...
SineFormer Technology - Sine-wave EMC Output Filters
... simultaneously converts the phaseto-phase voltages into a sinusoidal signal, damps the common mode currents and also forms the conductor-to-ground voltage to sine-shaped voltage. This offers users a number of key benefits. Voltage peaks that are harmful for the motor windings are suppressed and bear ...
... simultaneously converts the phaseto-phase voltages into a sinusoidal signal, damps the common mode currents and also forms the conductor-to-ground voltage to sine-shaped voltage. This offers users a number of key benefits. Voltage peaks that are harmful for the motor windings are suppressed and bear ...
Unit – 7
... The current drawn by an induction motor has two components, the current in phase with the voltage which governs the power transfer to the load and the inductive component, representing the magnetizing current in the magnetic circuit, which lags 90° behind the load current. The power factor is define ...
... The current drawn by an induction motor has two components, the current in phase with the voltage which governs the power transfer to the load and the inductive component, representing the magnetizing current in the magnetic circuit, which lags 90° behind the load current. The power factor is define ...
Thruster Electrical Service Notes
... QL Bow and Stern Thrusters Basic Electrical Troubleshooting All QL bow thrusters use similar wiring of the controls. The drive motor is a DC 12 or 24 series wound that is designed to draw a high current and to run in short bursts. There is a large reversing solenoid with two separate coils that are ...
... QL Bow and Stern Thrusters Basic Electrical Troubleshooting All QL bow thrusters use similar wiring of the controls. The drive motor is a DC 12 or 24 series wound that is designed to draw a high current and to run in short bursts. There is a large reversing solenoid with two separate coils that are ...
Wireless Bluetooth Controller For DC Motor
... Duty cycle determines speed by controlling how long switches are active Motor direction can be controlled IN1 and IN2 fed from PWM Adjusted voltage is output to motor terminals ...
... Duty cycle determines speed by controlling how long switches are active Motor direction can be controlled IN1 and IN2 fed from PWM Adjusted voltage is output to motor terminals ...
EE 328 _lect_04
... Vt = Ea –IaRa –VB = 275-95×0.125-2 = 261.13 V P0 = Vt Ia = 26.13×95=24.81 Kw ...
... Vt = Ea –IaRa –VB = 275-95×0.125-2 = 261.13 V P0 = Vt Ia = 26.13×95=24.81 Kw ...
In a typical DC motor, there are permanent magnets on the outside
... result, a very high current flows through the rotor. This is similar to a transformer with the secondary coil short circuited, which causes the primary coil to draw a high current from the mains. When an induction motor starts DOL, a very high current is drawn by the stator, in the order of 5 to 9 t ...
... result, a very high current flows through the rotor. This is similar to a transformer with the secondary coil short circuited, which causes the primary coil to draw a high current from the mains. When an induction motor starts DOL, a very high current is drawn by the stator, in the order of 5 to 9 t ...
Brushed DC electric motor
A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source. Brushed motors were the first commercially important application of electric power to driving mechanical energy,and DC distribution systems were used for more than 100 years to operate motors in commercial and industrial buildings. Brushed DC motors can be varied in speed by changing the operating voltage or the strength of the magnetic field. Depending on the connections of the field to the power supply, the speed and torque characteristics of a brushed motor can be altered to provide steady speed or speed inversely proportional to the mechanical load. Brushed motors continue to be used for electrical propulsion, cranes, paper machines and steel rolling mills. Since the brushes wear down and require replacement, brushless DC motors using power electronic devices have displaced brushed motors from many applications