Three phase system
... The lighter lines are easier to install, and the supporting structures can be less massive and farther apart. Three-phase equipment and motors have preferred running and starting characteristics compared to single-phase systems because of a more even flow of power to the transducer than can be deliv ...
... The lighter lines are easier to install, and the supporting structures can be less massive and farther apart. Three-phase equipment and motors have preferred running and starting characteristics compared to single-phase systems because of a more even flow of power to the transducer than can be deliv ...
Making of Micromouse - India Electronics and Robotics Components
... kp is proportional controller constant kd is derivative controller constant The value of adj is used to either speed up or speed down one of the wheel . www.raghu.co.nr ...
... kp is proportional controller constant kd is derivative controller constant The value of adj is used to either speed up or speed down one of the wheel . www.raghu.co.nr ...
A. Commutation Torque Ripple in the PAO Method
... PWM duty ratio was modified to compensate voltage disturbance caused by commutation current in the sensorless drive of the BLDC motor , an overlapping technique, which extends the phase conduction period over 120 electrical degree, was adopted to reduce the torque spike by exciting a new conducting ...
... PWM duty ratio was modified to compensate voltage disturbance caused by commutation current in the sensorless drive of the BLDC motor , an overlapping technique, which extends the phase conduction period over 120 electrical degree, was adopted to reduce the torque spike by exciting a new conducting ...
Technical Guide No. 102
... paths along the surface of the varnished windings, especially when combined with moisture from the surrounding environment. This facilitates high frequency surface tracking, which can effectively produce short circuits between otherwise insulated portions of the windings. ...
... paths along the surface of the varnished windings, especially when combined with moisture from the surrounding environment. This facilitates high frequency surface tracking, which can effectively produce short circuits between otherwise insulated portions of the windings. ...
Water Pumping System with PLC and Frequency Control
... pumping system were performed, using an open loop and programming method of control in which stored instructions in memory of PLC was used to control the pumping flow rate. PC is a personal computer which is used to write the control program; then download it to the PLC through communication cable. ...
... pumping system were performed, using an open loop and programming method of control in which stored instructions in memory of PLC was used to control the pumping flow rate. PC is a personal computer which is used to write the control program; then download it to the PLC through communication cable. ...
Riding the Reflected Wave - Engineering School Class Web Sites
... assuming peak pu over-voltages of the NEMA frame sizes are sufficiently close to the theoretical 2 pu value. Fig. 3 is a calculated and experimentally confirmed plot of motor pu over-voltage vs. cable length for various risetimes (varies with PWM manufacturer) associated with the drive semiconductor ...
... assuming peak pu over-voltages of the NEMA frame sizes are sufficiently close to the theoretical 2 pu value. Fig. 3 is a calculated and experimentally confirmed plot of motor pu over-voltage vs. cable length for various risetimes (varies with PWM manufacturer) associated with the drive semiconductor ...
BDTIC www.BDTIC.com/infineon AP90001
... The CoolSET™-F3 (ICE3B0565JG) meets the requirements for Off-Line Battery Adapters and low cost SMPS for the lower power range. The switching frequency is fixed to 67 kHz with frequency jittering for low EMI. The CoolSET F3 family provides the highest output power with the lowest losses available in ...
... The CoolSET™-F3 (ICE3B0565JG) meets the requirements for Off-Line Battery Adapters and low cost SMPS for the lower power range. The switching frequency is fixed to 67 kHz with frequency jittering for low EMI. The CoolSET F3 family provides the highest output power with the lowest losses available in ...
Planning of an electric system for a small CNC machine Thesis
... Electric devices and apparatuses must be designed, built and manufactured in a way ...
... Electric devices and apparatuses must be designed, built and manufactured in a way ...
EXAMPLES OF STATOR WINDING PARTIAL DISCHARGE DUE TO INVERTER DRIVES
... magnet wire, and given the relatively small diameter of the magnet wire, it seems that partial discharge can sometimes originate in the air space between two adjacent turns [5-7]. Since the thin magnet wire insulation is primarily made from organic materials, if sufficient PD activity occurs, the in ...
... magnet wire, and given the relatively small diameter of the magnet wire, it seems that partial discharge can sometimes originate in the air space between two adjacent turns [5-7]. Since the thin magnet wire insulation is primarily made from organic materials, if sufficient PD activity occurs, the in ...
Power Transformers 10 to 100 MVA
... core-and-coil assembly of the transformer is put together from the core, windings, clamping devices, on-load tap changer and the leads. After the dried core-and-coil assembly has been inserted into the tank, the transformer is evacuated and filled with transformer oil. Then accessories like motor dr ...
... core-and-coil assembly of the transformer is put together from the core, windings, clamping devices, on-load tap changer and the leads. After the dried core-and-coil assembly has been inserted into the tank, the transformer is evacuated and filled with transformer oil. Then accessories like motor dr ...
PCA1462U
... After a motor pulse, the motor is short-circuited to VDD for 1 ms. Afterwards the energy in the motor inductor will be dissipated to measure only the current generated by the induced motor voltage. During the time tDI (dissipation of energy time) all switches shown in Fig.5 are open to reduce the cu ...
... After a motor pulse, the motor is short-circuited to VDD for 1 ms. Afterwards the energy in the motor inductor will be dissipated to measure only the current generated by the induced motor voltage. During the time tDI (dissipation of energy time) all switches shown in Fig.5 are open to reduce the cu ...
A4954 - Elecanisms
... The A4954 is designed to operate two DC motors. The output drivers are all low-RDS(on) , N-channel DMOS drivers that feature internal synchronous rectification to reduce power dissipation. The current in each of the two output full bridges is regulated with fixed off-time pulse width modulated (PWM) ...
... The A4954 is designed to operate two DC motors. The output drivers are all low-RDS(on) , N-channel DMOS drivers that feature internal synchronous rectification to reduce power dissipation. The current in each of the two output full bridges is regulated with fixed off-time pulse width modulated (PWM) ...
Pdf - Text of NPTEL IIT Video Lectures
... inside the stator an EMF is induced in the armature coils, and across the brushes as the coils are serious connected between brushes as well as if a current is allowed to flow through these conductors by either connecting an external resistance and rotating the machine in which case it access as gen ...
... inside the stator an EMF is induced in the armature coils, and across the brushes as the coils are serious connected between brushes as well as if a current is allowed to flow through these conductors by either connecting an external resistance and rotating the machine in which case it access as gen ...
Quick Reference.backup.fm
... ATTENTION: Rotation of the motor in an undesired direction can occur during these procedures. Failure to observe this precaution could result in damage to equipment or bodily ...
... ATTENTION: Rotation of the motor in an undesired direction can occur during these procedures. Failure to observe this precaution could result in damage to equipment or bodily ...
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.