Press Applications: eddy-current vs VFDs
... At full speed and load, an AC motor will slip by an amount roughly equal to 3 percent of its synchronous speed, depending on the motor design. This slip represents energy loss in the rotor and converts directly to heat inside the motor, which must be dissipated. This makes AC motors relatively limit ...
... At full speed and load, an AC motor will slip by an amount roughly equal to 3 percent of its synchronous speed, depending on the motor design. This slip represents energy loss in the rotor and converts directly to heat inside the motor, which must be dissipated. This makes AC motors relatively limit ...
EET 027 - Electronics Instrumentation Lab
... outputs are balanced against one another. The secondary coils in an LVDT are connected in the opposite sense (one clockwise, the other counter clockwise). Thus when the same varying magnetic field is applied to both secondary coils, their output voltages have the same amplitude but differ in sign. T ...
... outputs are balanced against one another. The secondary coils in an LVDT are connected in the opposite sense (one clockwise, the other counter clockwise). Thus when the same varying magnetic field is applied to both secondary coils, their output voltages have the same amplitude but differ in sign. T ...
NCEA Level 3 Physics (90523) 2012 Assessment Schedule
... coils of the motor changes, inducing an EMF across the ends of the coil. • The EMF is proportional to the rate of change of flux so the faster the motor spins the greater the EMF. • The induced EMF will oppose the EMF from the battery, so it will limit the current in the coil. (This limits the amoun ...
... coils of the motor changes, inducing an EMF across the ends of the coil. • The EMF is proportional to the rate of change of flux so the faster the motor spins the greater the EMF. • The induced EMF will oppose the EMF from the battery, so it will limit the current in the coil. (This limits the amoun ...
Schneider Altivar ATV12 Quick Start Guide
... - Measure the voltage of the DC bus between the PA/+ and PC/- terminals to ensure that the voltage is less than 42 Vdc. - If the DC bus capacitors do not discharge completely, contact your local Schneider Electric representative. Do not repair or operate the drive • Install and close all covers befo ...
... - Measure the voltage of the DC bus between the PA/+ and PC/- terminals to ensure that the voltage is less than 42 Vdc. - If the DC bus capacitors do not discharge completely, contact your local Schneider Electric representative. Do not repair or operate the drive • Install and close all covers befo ...
Motor Single-Phasing Voltage Unbalance
... From the above data, it can be seen that 44% of motor failure problems are related to HEAT. Allowing a motor to reach and operate at a temperature 10°C above its maximum temperature rating will reduce the motor’s expected life by 50%. Operating at 10°C above this, the motor’s life will be reduced ag ...
... From the above data, it can be seen that 44% of motor failure problems are related to HEAT. Allowing a motor to reach and operate at a temperature 10°C above its maximum temperature rating will reduce the motor’s expected life by 50%. Operating at 10°C above this, the motor’s life will be reduced ag ...
excitation of dc generator
... Separately excited DC generators have many advantages over self-excited DC generators. It can operate in stable condition with any field excitation and gives wide range of output voltage. The main disadvantage of these kinds of generators is that it is very expensive of providing a separate excitati ...
... Separately excited DC generators have many advantages over self-excited DC generators. It can operate in stable condition with any field excitation and gives wide range of output voltage. The main disadvantage of these kinds of generators is that it is very expensive of providing a separate excitati ...
IES PE Short Course
... Fact: Salient pole rotors are cheaper to build than smooth. Do hydro-turbine generators have salient poles or smooth? ...
... Fact: Salient pole rotors are cheaper to build than smooth. Do hydro-turbine generators have salient poles or smooth? ...
International Electrical Engineering Journal (IEEJ) Vol. 6 (2015) No.X, pp. XX-XX
... In the stationary reference frame, the rotor angle value is set to 0 and the value of δ is set to -θr. The reference frame affects the simulation speed, waveforms of all dq variables and in some certain cases the accuracy of the obtained results. The brief descriptions of the used SCIM block paramet ...
... In the stationary reference frame, the rotor angle value is set to 0 and the value of δ is set to -θr. The reference frame affects the simulation speed, waveforms of all dq variables and in some certain cases the accuracy of the obtained results. The brief descriptions of the used SCIM block paramet ...
13-14 thru 13-26
... wind varies with the armature current, the compensating field balances out the armature current and protects the permanent magnets. The Ward Leonard Drive ...
... wind varies with the armature current, the compensating field balances out the armature current and protects the permanent magnets. The Ward Leonard Drive ...
The Micro Magician robot controller is the perfect choice
... Reverse polarity protection rated at 6A for protecting servos and motor driver IC Reverse polarity protection rated at 3A for logic and other 3.3V devices Built in USB using the CP2102 interface IC Built in dual FET "H" bridge with current limiting, motor stall detection and electronic braking Built ...
... Reverse polarity protection rated at 6A for protecting servos and motor driver IC Reverse polarity protection rated at 3A for logic and other 3.3V devices Built in USB using the CP2102 interface IC Built in dual FET "H" bridge with current limiting, motor stall detection and electronic braking Built ...
A Mathematical Model to Choose Optimal Subsynchronous
... important that the cascades have a high degree of operation and that they are can be used in modern automation systems. Lately, more focus is given on rational use of energy. Undoubtedly, with an EMD with slip-ring motors, especially the high-power ones, it is not reasonable to control the rotation ...
... important that the cascades have a high degree of operation and that they are can be used in modern automation systems. Lately, more focus is given on rational use of energy. Undoubtedly, with an EMD with slip-ring motors, especially the high-power ones, it is not reasonable to control the rotation ...
Week22_revised_Motor_Control_PWM
... motor whine is outside the normal human hearing range (20 – 20,000 Hz). If your motor driver circuitry uses MOSFETs, the PWM frequency should never exceed the switching speed of the MOSFET. Because of the weight of the motor armature and its inertia, the motor speed won't vary noticeable between e ...
... motor whine is outside the normal human hearing range (20 – 20,000 Hz). If your motor driver circuitry uses MOSFETs, the PWM frequency should never exceed the switching speed of the MOSFET. Because of the weight of the motor armature and its inertia, the motor speed won't vary noticeable between e ...
500 Series Manual
... accordance with local, state, and national safety codes. Make certain that the power supply is disconnected before attempting to service or remove any components!!! If the power disconnect point is out of sight, lock it in disconnected position and tag to prevent unexpected application of power. Onl ...
... accordance with local, state, and national safety codes. Make certain that the power supply is disconnected before attempting to service or remove any components!!! If the power disconnect point is out of sight, lock it in disconnected position and tag to prevent unexpected application of power. Onl ...
Electro-magnetic flow meters
... flux. Consider also how useful this integration method is in practical inductor design; if you know the number of turns on a winding and the voltage waveform on it then you integrate with regard to time and voilá you have found the amount of flux. What’s more is that you found it without knowing abo ...
... flux. Consider also how useful this integration method is in practical inductor design; if you know the number of turns on a winding and the voltage waveform on it then you integrate with regard to time and voilá you have found the amount of flux. What’s more is that you found it without knowing abo ...
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