DEPARTMENT OF ELECTRICAL ENGINEERING EA3220: ELECTRICAL MEASUREMENT & MEASURING INSTRUMENTS
... three phase system, errors & remedies in wattmeter and energy meter. UNIT II: Instrument transformers: Instrument Transformer and their applications in the extension of instrument range, Introduction to measurement of speed, frequency and power factor. UNIT III: Measurement of Parameters: Different ...
... three phase system, errors & remedies in wattmeter and energy meter. UNIT II: Instrument transformers: Instrument Transformer and their applications in the extension of instrument range, Introduction to measurement of speed, frequency and power factor. UNIT III: Measurement of Parameters: Different ...
electrical engineering technology emt 113/4
... It run essentially constant speed from zero to full-load. The speed is frequency-dependent and consequently these motors are not easily adapted to speed control Induction machines is called induction because the rotor voltage (which produces the rotor current and the rotor magnetic field) is induced ...
... It run essentially constant speed from zero to full-load. The speed is frequency-dependent and consequently these motors are not easily adapted to speed control Induction machines is called induction because the rotor voltage (which produces the rotor current and the rotor magnetic field) is induced ...
Precision High Side Current Sense Amplifiers
... The LT1999 accurately measures fast switching currents in H-bridge motor controls, switching power supplies, solenoids and battery chargers. It features a –5V to 80V input common mode voltage range, 2MHz bandwidth, less than 1.5mV offset voltage and 0.5% gain error over temperature. With more than 8 ...
... The LT1999 accurately measures fast switching currents in H-bridge motor controls, switching power supplies, solenoids and battery chargers. It features a –5V to 80V input common mode voltage range, 2MHz bandwidth, less than 1.5mV offset voltage and 0.5% gain error over temperature. With more than 8 ...
electrical engineering technology emt 113/4
... It run essentially constant speed from zero to full-load. The speed is frequency-dependent and consequently these motors are not easily adapted to speed control Induction machines is called induction because the rotor voltage (which produces the rotor current and the rotor magnetic field) is induced ...
... It run essentially constant speed from zero to full-load. The speed is frequency-dependent and consequently these motors are not easily adapted to speed control Induction machines is called induction because the rotor voltage (which produces the rotor current and the rotor magnetic field) is induced ...
EASA`s "Getting the most from your Electric Motors"
... of belt-driven machines. Poor belt alignment may place excessive axial load on the motor bearings. It also may cause belts to be over tensioned, increasing the radial load on the bearings. Belt alignment is simpler than coupling alignment but still must be done accurately. The correct tool could be ...
... of belt-driven machines. Poor belt alignment may place excessive axial load on the motor bearings. It also may cause belts to be over tensioned, increasing the radial load on the bearings. Belt alignment is simpler than coupling alignment but still must be done accurately. The correct tool could be ...
Window Lift and Relay Based DC Motor Control
... channels. The hall sensor is powered by the EVDD pin which is capable of supplying up to 20 mA @ 5 V. DC motor: The DC motor is driven by a twin single pole double throw relay. This configuration allows the relay to also act as an H bridge allowing the MCU to polarize the motor in either direction. ...
... channels. The hall sensor is powered by the EVDD pin which is capable of supplying up to 20 mA @ 5 V. DC motor: The DC motor is driven by a twin single pole double throw relay. This configuration allows the relay to also act as an H bridge allowing the MCU to polarize the motor in either direction. ...
actuators
... form poles around which are wound copper wire coils. • These primary windings connect to, and are energized by, the voltage source to produce a rotating magnetic field. • Three-phase windings spaced 120 electrical degrees apart are popular in industry. Rotor • Rotor is another assembly of lamination ...
... form poles around which are wound copper wire coils. • These primary windings connect to, and are energized by, the voltage source to produce a rotating magnetic field. • Three-phase windings spaced 120 electrical degrees apart are popular in industry. Rotor • Rotor is another assembly of lamination ...
(SEIG) or Squirrel Cage Induction Generator
... there is an outer stationary member (stator) and an inner rotating member (rotor). The rotor is mounted on bearings fixed to the stator. Both the stator and the rotor carry cylindrical iron cores, which are separated by an air gap. The cores are made of magnetic iron of high permeability and have co ...
... there is an outer stationary member (stator) and an inner rotating member (rotor). The rotor is mounted on bearings fixed to the stator. Both the stator and the rotor carry cylindrical iron cores, which are separated by an air gap. The cores are made of magnetic iron of high permeability and have co ...
motors in parallel
... ● Factors to be taken into account: ● If parallel cables are used, the cable lenght to be considered must be multiplied by 2, ● If motors are in parallel, the cable lenght to be considered must be the sum of all motor cable lengthes. ● Note: a multiplication factor can be used if the swithching freq ...
... ● Factors to be taken into account: ● If parallel cables are used, the cable lenght to be considered must be multiplied by 2, ● If motors are in parallel, the cable lenght to be considered must be the sum of all motor cable lengthes. ● Note: a multiplication factor can be used if the swithching freq ...
comparison star – delta starting versus softstarter - T-Net
... or unknown phase sequence the load motor and load may rotate in the wrong direction. This can cause damage to some rotating machines. This type of fault normally presents after contactor or field wiring maintenance. » PHASES IMBALANCE: This cannot be controlled. If motor continues operation with imb ...
... or unknown phase sequence the load motor and load may rotate in the wrong direction. This can cause damage to some rotating machines. This type of fault normally presents after contactor or field wiring maintenance. » PHASES IMBALANCE: This cannot be controlled. If motor continues operation with imb ...
Synchronous Machines
... When a synchronous generator is excited with field current and is driven at a constant speed, a balanced voltage is generated in the armature winding. If a balanced load is now connected to the armature winding, a balanced armature current at the same frequency as the emf will flow. Since the freque ...
... When a synchronous generator is excited with field current and is driven at a constant speed, a balanced voltage is generated in the armature winding. If a balanced load is now connected to the armature winding, a balanced armature current at the same frequency as the emf will flow. Since the freque ...
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