What Do All Those Things on an AC Motor Nameplate Mean?
... torque required for the load at rated speed. It is usually given as "HP" on the nameplate. In general: HP = (Torque) x (speed)/5,250 where: Torque is in lb-ft Speed is in rpm Full-load speed The speed at which rated full-load torque is delivered at rated power output is full-load speed. It is genera ...
... torque required for the load at rated speed. It is usually given as "HP" on the nameplate. In general: HP = (Torque) x (speed)/5,250 where: Torque is in lb-ft Speed is in rpm Full-load speed The speed at which rated full-load torque is delivered at rated power output is full-load speed. It is genera ...
Implementation and simulation of sensorless control and field weaken
... invention it has been mostly used in fixed speed applications such as driving fans, pumps, compressors and more. During the recent decades, modern power electronics has made it more popular in variable-speed applications [5]. Today there are several different methods for controlling the speed of the ...
... invention it has been mostly used in fixed speed applications such as driving fans, pumps, compressors and more. During the recent decades, modern power electronics has made it more popular in variable-speed applications [5]. Today there are several different methods for controlling the speed of the ...
AC motor
... increases the amount of slip as the motor slows down slightly. Even with no load, internal mechanical losses prevent the slip from being zero. The speed of the AC motor is determined primarily by the frequency of the AC supply and the number of poles in the stator winding, according to the relation: ...
... increases the amount of slip as the motor slows down slightly. Even with no load, internal mechanical losses prevent the slip from being zero. The speed of the AC motor is determined primarily by the frequency of the AC supply and the number of poles in the stator winding, according to the relation: ...
DC3N DC Drive User Guide 1/4 to 2 HP, 115/230 VAC
... ATTENTION: Reduce the chance of an electrical fire, shock, or explosion by proper grounding, over-current protection, thermal protection and enclosure. Follow sound maintenance procedures. ATTENTION: Starting and stopping with the inhibit terminal pins does not disconnect AC power in the stop positi ...
... ATTENTION: Reduce the chance of an electrical fire, shock, or explosion by proper grounding, over-current protection, thermal protection and enclosure. Follow sound maintenance procedures. ATTENTION: Starting and stopping with the inhibit terminal pins does not disconnect AC power in the stop positi ...
Slides on Steady-state basics
... Type 4 maintains generator at “slow” rotor rotational speed producing low freq in stator winding which is transformed by converter to grid. Also called “direct-drive.” Usually uses a PM synchronous generator. ...
... Type 4 maintains generator at “slow” rotor rotational speed producing low freq in stator winding which is transformed by converter to grid. Also called “direct-drive.” Usually uses a PM synchronous generator. ...
Basics For Practical Operation Motor Starting Notes
... lower than the motor’s rated current by a factor of 1√3 = 0.58. Due to the third harmonics currents circulating in the motor windings, a higher setting of the overload relay may be required. This may only be carried out on the basis of utilising a measuring device which records the correct r.m.s. va ...
... lower than the motor’s rated current by a factor of 1√3 = 0.58. Due to the third harmonics currents circulating in the motor windings, a higher setting of the overload relay may be required. This may only be carried out on the basis of utilising a measuring device which records the correct r.m.s. va ...
Operation Manual
... material and workmanship for a period of one (1) year from the date of shipment thereof. Within the warranty period, LEESON will repair or replace such products that are returned to LEESON or to the nearest Branch Office, with shipping charges prepaid. At our option, all return shipments are F.O.B. ...
... material and workmanship for a period of one (1) year from the date of shipment thereof. Within the warranty period, LEESON will repair or replace such products that are returned to LEESON or to the nearest Branch Office, with shipping charges prepaid. At our option, all return shipments are F.O.B. ...
Determining Electric Motor Load and Efficiency
... Computerized Load and Efficiency Estimation Techniques There are several sophisticated methods for determining motor efficiency. These fall into three categories: special devices, software methods, and analytical methods. The special devices package all or most of the required instrumentation in a p ...
... Computerized Load and Efficiency Estimation Techniques There are several sophisticated methods for determining motor efficiency. These fall into three categories: special devices, software methods, and analytical methods. The special devices package all or most of the required instrumentation in a p ...
unit 6 dynamic braking - Indian Railways Institute of Mechanical and
... For example at high train speed we need a weak motor field to hold the braking current to a reasonable value. This calls for a small main generator output. The driver achieves this by moving the selector handle. At low speed we need a strong motor field to get full braking current. He gets this by m ...
... For example at high train speed we need a weak motor field to hold the braking current to a reasonable value. This calls for a small main generator output. The driver achieves this by moving the selector handle. At low speed we need a strong motor field to get full braking current. He gets this by m ...
Microelectromechanical Devices
... demodulator creates a dc output that is proportional to sin( ) . An integral controller, VCO, and up-down counter together generate an estimated . Under steady state conditions the tracking error will be zero. ...
... demodulator creates a dc output that is proportional to sin( ) . An integral controller, VCO, and up-down counter together generate an estimated . Under steady state conditions the tracking error will be zero. ...
Power System Stabilizer (PSS) - Mitsubishi Electric Power Products
... During site examination, to confirm the effectiveness of the PSS, power fluctuations are generated when the PSS is in use and when it is not in use, and damping measurements are compared. As a common method for generating power fluctuations, a generator voltage transient response test, is applied. I ...
... During site examination, to confirm the effectiveness of the PSS, power fluctuations are generated when the PSS is in use and when it is not in use, and damping measurements are compared. As a common method for generating power fluctuations, a generator voltage transient response test, is applied. I ...
Hardware Design Considerations for an Efficient
... powered by a DC electric source through an integrated inverter, which produces an AC electric signal to drive the motor; additional sensors and electronics control the inverter output. The commutation is electronically controlled. Commutation time is provided by back electromotive force (EMF) measur ...
... powered by a DC electric source through an integrated inverter, which produces an AC electric signal to drive the motor; additional sensors and electronics control the inverter output. The commutation is electronically controlled. Commutation time is provided by back electromotive force (EMF) measur ...
Paralleling Dissimilar Generators
... differences in prime power applications, such as are used in remote, isolated cities and towns. In those applications, loads during the daylight hours are often much higher than in the evenings. A pair of 350 kW generator sets may be running during the day, and only a 50 kW set running at night. Thi ...
... differences in prime power applications, such as are used in remote, isolated cities and towns. In those applications, loads during the daylight hours are often much higher than in the evenings. A pair of 350 kW generator sets may be running during the day, and only a 50 kW set running at night. Thi ...
Stepper Motor Speed Control
... CONST. & OPER.:HOLDING TORQUE:The following is a definition of holding torque "With the motor shaft at stand still or zero RPM condition, the amount of torque, from an external source, required to break away the shaft from its holding position. This is measured with rated voltage and current app ...
... CONST. & OPER.:HOLDING TORQUE:The following is a definition of holding torque "With the motor shaft at stand still or zero RPM condition, the amount of torque, from an external source, required to break away the shaft from its holding position. This is measured with rated voltage and current app ...
Field Oriented Control of PM Motors
... During the last few decades the field of controlled electrical drives has undergone rapid expansion due mainly to the benefits of micro-controllers. These technological improvements have enabled the development of very effective AC drive control with lower power dissipation hardware and more accurat ...
... During the last few decades the field of controlled electrical drives has undergone rapid expansion due mainly to the benefits of micro-controllers. These technological improvements have enabled the development of very effective AC drive control with lower power dissipation hardware and more accurat ...
Brush Type Manual - General Dynamics Mission Systems
... that stand up to the most rigorous environments.We supply high performance products that withstand 700 g’s of shock, 15,000 lbs of pressure, and temperature ranges from -55ºC to +200ºC, for applications from ...
... that stand up to the most rigorous environments.We supply high performance products that withstand 700 g’s of shock, 15,000 lbs of pressure, and temperature ranges from -55ºC to +200ºC, for applications from ...
load- and test resistors
... Continuous operation outputs of several megawatts as well as special designs can also be realised. The devices which are customer-specific in almost all cases can be equipped with any kind of step circuit, regulation, measurement and control. ...
... Continuous operation outputs of several megawatts as well as special designs can also be realised. The devices which are customer-specific in almost all cases can be equipped with any kind of step circuit, regulation, measurement and control. ...
Unit -5 - WordPress.com
... According to Faraday’s law an Emf induced in any circuit is due to the rate of change of magnetic flux linkage through the circuit. As the rotor winding in an induction motor are either closed through an external resistance or directly shorted by end ring, and cut the stator rotating magnetic field ...
... According to Faraday’s law an Emf induced in any circuit is due to the rate of change of magnetic flux linkage through the circuit. As the rotor winding in an induction motor are either closed through an external resistance or directly shorted by end ring, and cut the stator rotating magnetic field ...
Lecture03-motors
... • Also part of the motor driver chips are four diodes connecting from each driver output to either Vs , the motor voltage supply, or ground. These diodes perform the important function of trapping and shunting away inductive voltage spikes that naturally occur as part of any motor’s operation. • Dio ...
... • Also part of the motor driver chips are four diodes connecting from each driver output to either Vs , the motor voltage supply, or ground. These diodes perform the important function of trapping and shunting away inductive voltage spikes that naturally occur as part of any motor’s operation. • Dio ...
simulink model of adapative fuzzy pid controller
... make synchronous machine prevalent in industrial applications. Due to high power to weight ratio, high torque, good dynamic control for variable speed applications, absence of brushes and commutator make Brushless dc (BLDC) motor, best choice for high performance applications. Due to the absence of ...
... make synchronous machine prevalent in industrial applications. Due to high power to weight ratio, high torque, good dynamic control for variable speed applications, absence of brushes and commutator make Brushless dc (BLDC) motor, best choice for high performance applications. Due to the absence of ...
national unit specification: general information
... This Unit has been designed to initially take a systems approach to electrical motor drive systems via a block diagram approach. Individual parts of the system (e.g. transmission arrangements, electrical protection and starting and braking) are then analysed in greater depth. The operation and perfo ...
... This Unit has been designed to initially take a systems approach to electrical motor drive systems via a block diagram approach. Individual parts of the system (e.g. transmission arrangements, electrical protection and starting and braking) are then analysed in greater depth. The operation and perfo ...
Induction Motors
... • Once the rotor is excited by a three phase supply, the motors starts rotating as an induction motor at sub synchronous speed. Then d.c. supply is given to the field winding. At a particular instant motor gets pulled into synchronism and starts rotating at a synchronous speed. As rotor rotates at ...
... • Once the rotor is excited by a three phase supply, the motors starts rotating as an induction motor at sub synchronous speed. Then d.c. supply is given to the field winding. At a particular instant motor gets pulled into synchronism and starts rotating at a synchronous speed. As rotor rotates at ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... Simulation of Four Quadrant Operation of Sensor less BLDC Motor controls the motor's speed by varying the DC bus voltage. The difference between the required speed and the actual speed is input into the PI controller, which then modulates the duty cycle of the PWM based on the error signal obtained ...
... Simulation of Four Quadrant Operation of Sensor less BLDC Motor controls the motor's speed by varying the DC bus voltage. The difference between the required speed and the actual speed is input into the PI controller, which then modulates the duty cycle of the PWM based on the error signal obtained ...
Dynamic Balancing of Rotating Machinery
... Production tolerances used in the manufacture of rotors are adjusted as closely as possible without running up the cost of manufacturing prohibitively. In general, it is more economical to produce parts, which are not quite true, and then to subject them to a balancing procedure than to produce such ...
... Production tolerances used in the manufacture of rotors are adjusted as closely as possible without running up the cost of manufacturing prohibitively. In general, it is more economical to produce parts, which are not quite true, and then to subject them to a balancing procedure than to produce such ...
Specification for three phase AUMATIC electric actuators - Auma-USA
... torque and/or thrust requirement as indicated by the valve manufacturer or supplier. The actuator must be adequately sized to provide the torque required to operate the valve at 90% of the nominal voltage. The operating speed shall provide valve closing and opening at approximately 12 inches per min ...
... torque and/or thrust requirement as indicated by the valve manufacturer or supplier. The actuator must be adequately sized to provide the torque required to operate the valve at 90% of the nominal voltage. The operating speed shall provide valve closing and opening at approximately 12 inches per min ...
Dynamometer
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A dynamometer or ""dyno"" for short, is a device for measuring force, torque, or power. For example, the power produced by an engine, motor or other rotating prime mover can be calculated by simultaneously measuring torque and rotational speed (RPM).A dynamometer can also be used to determine the torque and power required to operate a driven machine such as a pump. In that case, a motoring or driving dynamometer is used. A dynamometer that is designed to be driven is called an absorption or passive dynamometer. A dynamometer that can either drive or absorb is called a universal or active dynamometer.In addition to being used to determine the torque or power characteristics of a machine under test (MUT), dynamometers are employed in a number of other roles. In standard emissions testing cycles such as those defined by the United States Environmental Protection Agency (US EPA), dynamometers are used to provide simulated road loading of either the engine (using an engine dynamometer) or full powertrain (using a chassis dynamometer). In fact, beyond simple power and torque measurements, dynamometers can be used as part of a testbed for a variety of engine development activities, such as the calibration of engine management controllers, detailed investigations into combustion behavior, and tribology.In the medical terminology, hand-held dynamometers are used for routine screening of grip and hand strength, and the initial and ongoing evaluation of patients with hand trauma or dysfunction. They are also used to measure grip strength in patients where compromise of the cervical nerve roots or peripheral nerves is suspected.In the rehabilitation, kinesiology, and ergonomics realms, force dynamometers are used for measuring the back, grip, arm, and/or leg strength of athletes, patients, and workers to evaluate physical status, performance, and task demands. Typically the force applied to a lever or through a cable is measured and then converted to a moment of force by multiplying by the perpendicular distance from the force to the axis of the level.