Speed control using the L6235 or L6229 with a PWM output from a
... and is not appropriate for a speed control. One could use the enable input but you would need to have two signals from the microcontroller, the PWM for speed and the direction input. This approach is more cumbersome when crossing zero speed and reversing direction. April 2012 ...
... and is not appropriate for a speed control. One could use the enable input but you would need to have two signals from the microcontroller, the PWM for speed and the direction input. This approach is more cumbersome when crossing zero speed and reversing direction. April 2012 ...
7154 VFD - Cincinnati State
... of 45 C and a have a maximum temperature rise of 115 C. Their watts loss must be less than 1% of the rated load. Box lug type terminals must be provided on all reactors rated from 2 amps thru 400 amps. Higher current reactors may be supplied with copper tab type terminals. Reactor must be MTE Corpor ...
... of 45 C and a have a maximum temperature rise of 115 C. Their watts loss must be less than 1% of the rated load. Box lug type terminals must be provided on all reactors rated from 2 amps thru 400 amps. Higher current reactors may be supplied with copper tab type terminals. Reactor must be MTE Corpor ...
Three Phase Systems
... Using a neutral wire allows higher voltage to be used in a single phase ...
... Using a neutral wire allows higher voltage to be used in a single phase ...
Lab 6 - PSU MNE
... the motor control voltage is toggled rapidly enough from 0 to full scale, the electrical and inertial characteristics of the motor will smooth out the speed variations. A 0 to 5 V square wave with 50% duty cycle will produce approximately the same motor response as a steady 2.5 V DC level. In this m ...
... the motor control voltage is toggled rapidly enough from 0 to full scale, the electrical and inertial characteristics of the motor will smooth out the speed variations. A 0 to 5 V square wave with 50% duty cycle will produce approximately the same motor response as a steady 2.5 V DC level. In this m ...
P6 Revision Questions Motors and Generators
... How is electricity generated at a power station? Put a tick ( ) in the box next to the correct answer. A bar magnet rotates inside coils of wire. An electromagnet rotates around a permanent magnet. ...
... How is electricity generated at a power station? Put a tick ( ) in the box next to the correct answer. A bar magnet rotates inside coils of wire. An electromagnet rotates around a permanent magnet. ...
Synchronous Generator
... WHAT IS THE ALTERNATOR:• Synchronous generator or basically case machine and ...
... WHAT IS THE ALTERNATOR:• Synchronous generator or basically case machine and ...
High Power Density Marine Propulsion Motors with Double
... flux pump incorporated in a completely superconducting circuit without any external connection to the machine frame. The resulting low inductance, high current design facilitates the quench protection of high energy content coils. The high power is developed in conjunction with a close-fitting super ...
... flux pump incorporated in a completely superconducting circuit without any external connection to the machine frame. The resulting low inductance, high current design facilitates the quench protection of high energy content coils. The high power is developed in conjunction with a close-fitting super ...
FG2611011107
... position. A PMBLDCM has the developed torque proportional to its phase current and its back electromotive force (EMF), which is proportional to the speed.[1] A BLDC motor needs quasi square current waveforms, which are synchronized with the back-EMF to generate constant output torque and have 120 co ...
... position. A PMBLDCM has the developed torque proportional to its phase current and its back electromotive force (EMF), which is proportional to the speed.[1] A BLDC motor needs quasi square current waveforms, which are synchronized with the back-EMF to generate constant output torque and have 120 co ...
Wide-Speed Operation of Direct Torque
... The stator of the considered VSI-fed IPMSM is a typical AC design accommodating a three-phase distributed winding in slots to produce the synchronously-rotating, quasi-sinusoidal armature-mmf wave. Conversely, the IPMSM rotor can be designed in different configurations. However, only two of them wit ...
... The stator of the considered VSI-fed IPMSM is a typical AC design accommodating a three-phase distributed winding in slots to produce the synchronously-rotating, quasi-sinusoidal armature-mmf wave. Conversely, the IPMSM rotor can be designed in different configurations. However, only two of them wit ...
How to use STP Calculator
... STP Calculator is a tool (windows program) that simplifies fractional horsepower motor and gearmotor selection for engineers and product designers. Specifically designed for motor evaluation, STP assists users with the evaluation of the critical relationship between input of electrical power and out ...
... STP Calculator is a tool (windows program) that simplifies fractional horsepower motor and gearmotor selection for engineers and product designers. Specifically designed for motor evaluation, STP assists users with the evaluation of the critical relationship between input of electrical power and out ...
Document
... The direction of rotation of 3-phase motors can be reversed by interchanging any two of the 3-phase power lines to the motor. ...
... The direction of rotation of 3-phase motors can be reversed by interchanging any two of the 3-phase power lines to the motor. ...
Fuses - R Rated
... The fuse that should be selected is the smallest fuse whose minimum melting characteristic crosses the overload relay at a current greater than 110% of the locked rotor current. In this example, it would be a 2400V 9R fuse. This agrees with the quick selection choice. Depending on the type of instal ...
... The fuse that should be selected is the smallest fuse whose minimum melting characteristic crosses the overload relay at a current greater than 110% of the locked rotor current. In this example, it would be a 2400V 9R fuse. This agrees with the quick selection choice. Depending on the type of instal ...
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.