A TORQUE TRACKING CONTROL ALGORITHM FOR DOUBLY
... A doubly-fed induction generator is an electrical asynchronous three-phase machine with open rotor windings which can be fed by external voltages. The typical connection scheme of this generator is reported in Fig. 1. The stator windings are directly connected to the line grid, while the rotor windi ...
... A doubly-fed induction generator is an electrical asynchronous three-phase machine with open rotor windings which can be fed by external voltages. The typical connection scheme of this generator is reported in Fig. 1. The stator windings are directly connected to the line grid, while the rotor windi ...
MOTOR CONTROL STARTER
... Synchronous Speed Speed at which it takes the motor to go one cycle and one revolution. S=[120*frequency}] (# poles) Example: For a three-phase, 60 Hertz, 2 pole motor: S=[120*60]/2=3600 revolutions per minute ...
... Synchronous Speed Speed at which it takes the motor to go one cycle and one revolution. S=[120*frequency}] (# poles) Example: For a three-phase, 60 Hertz, 2 pole motor: S=[120*60]/2=3600 revolutions per minute ...
Muscular System notes
... The summary takes a lot of space, but it is not that complicated. It will not account for much of the test. If you are short on time, you may want to study this last. ____________________________ If you know the distance from the joint center to the load and the distance from the joint center to the ...
... The summary takes a lot of space, but it is not that complicated. It will not account for much of the test. If you are short on time, you may want to study this last. ____________________________ If you know the distance from the joint center to the load and the distance from the joint center to the ...
- Switched Reluctance Drive Systems
... Due to the absence of rotor windings, SRM is very simple to construct, has a low inertia and allows an extremely high-speed operation. SRM operates in constant torque from zero speed up to the rated speed. Above rated speed up to a certain speed, the operation is in constant power. The range of this ...
... Due to the absence of rotor windings, SRM is very simple to construct, has a low inertia and allows an extremely high-speed operation. SRM operates in constant torque from zero speed up to the rated speed. Above rated speed up to a certain speed, the operation is in constant power. The range of this ...
SCIENTIFIC PAPERS OF THE UNIVERSITY OF PARDUBICE UTILIZATION OF INDUCTION-MACHINE MATHEMATICAL MODEL
... Here, a complex analysis of the asynchronous machine is to be performed, which includes the determination of particular machine properties, theperformance analyses of drives with given loads or debugging of control units, the responses of electric, mechanic and magnetic quantities, which are mutuall ...
... Here, a complex analysis of the asynchronous machine is to be performed, which includes the determination of particular machine properties, theperformance analyses of drives with given loads or debugging of control units, the responses of electric, mechanic and magnetic quantities, which are mutuall ...
UNIT-IV 1 Mark questions
... 14. A 220 V shunt motor develops a torque of 54 N-m at armature current of 10 A.The torque produced when the armature current is 20 A, is (a) 54 N-m (b) 81 N-m (c) 108 N-m (d) None of the above 15. The d.c. series motor should never be switched on at no load because (a) the field current is zero ...
... 14. A 220 V shunt motor develops a torque of 54 N-m at armature current of 10 A.The torque produced when the armature current is 20 A, is (a) 54 N-m (b) 81 N-m (c) 108 N-m (d) None of the above 15. The d.c. series motor should never be switched on at no load because (a) the field current is zero ...
Paper Title (use style: paper title)
... The variable speed electrohydraulic drive uses a variable speed electric motor to drive a hydraulic fixed displacement pump, by adjusting the electric motor speed to regulate the hydraulic pump output flow rate so as to meet the loaddemand. [1, 2]. The VFD is a system for controlling the rotational ...
... The variable speed electrohydraulic drive uses a variable speed electric motor to drive a hydraulic fixed displacement pump, by adjusting the electric motor speed to regulate the hydraulic pump output flow rate so as to meet the loaddemand. [1, 2]. The VFD is a system for controlling the rotational ...
Dual Motor Telescoping Column
... The outer surface of the stylish aluminium profile is matt anodised. The no-play sliding devices ensure the profiles can be extended and retracted without friction, even in the case of eccentric loads. TELESMART lifting columns have been designed to handle compressive loads. The actuator takes the f ...
... The outer surface of the stylish aluminium profile is matt anodised. The no-play sliding devices ensure the profiles can be extended and retracted without friction, even in the case of eccentric loads. TELESMART lifting columns have been designed to handle compressive loads. The actuator takes the f ...
ESU Analyzer Series ESU Analyzer Series
... setup relays to control the measurement path, allowing the user to switch between Power measurements, Leakage measurements, REM/ARM/CQM testing, or even run an autosequence that could include any or all of these tests – without even moving wires around. The current transformer internal to the (68 ...
... setup relays to control the measurement path, allowing the user to switch between Power measurements, Leakage measurements, REM/ARM/CQM testing, or even run an autosequence that could include any or all of these tests – without even moving wires around. The current transformer internal to the (68 ...
Start of pump systems
... A high acceleration pressure head will be created during the speeding up phase. This is due to the rapid acceleration of the empty system. The pressure head curve during start up will meet the pump curve at a point where the flow and hence the power is high (2). A high power in the full speed duty p ...
... A high acceleration pressure head will be created during the speeding up phase. This is due to the rapid acceleration of the empty system. The pressure head curve during start up will meet the pump curve at a point where the flow and hence the power is high (2). A high power in the full speed duty p ...
MasterCraft 2006 - Perfectpass.com
... Make sure system is in ON Mode prior to starting test. You must have an RPM reading on PerfectPass display or it will never work properly. With engine ON, lock the gearshift in neutral and advance the throttle handle to 1800 RPM. When all is working correctly an “S” will appear next to the “R” and t ...
... Make sure system is in ON Mode prior to starting test. You must have an RPM reading on PerfectPass display or it will never work properly. With engine ON, lock the gearshift in neutral and advance the throttle handle to 1800 RPM. When all is working correctly an “S” will appear next to the “R” and t ...
Induction Motors
... operate at its rated power. For the small back-emf in this region, the current can be set at any desired level by means of regulators such as hysteresis controller or voltage PWM controller. Region2: The constant power limit region is the region where the controller maintains the torque inversely ...
... operate at its rated power. For the small back-emf in this region, the current can be set at any desired level by means of regulators such as hysteresis controller or voltage PWM controller. Region2: The constant power limit region is the region where the controller maintains the torque inversely ...
Rotating DC Motors Part I
... Figure 4. Note, while the brushes contact both commutator segments (positions 1 and 3), the current is diverted from the loop and will flow directly from the top brush to the lower brush (this short-circuit condition will go away as we move to a more practical machine). In position 2, the current fl ...
... Figure 4. Note, while the brushes contact both commutator segments (positions 1 and 3), the current is diverted from the loop and will flow directly from the top brush to the lower brush (this short-circuit condition will go away as we move to a more practical machine). In position 2, the current fl ...
GENERATOR DC / AC 60 HZ, SPEED = …3600 RPM
... ** External case drain line may be required on some units refer to specific model number. When external case drain is required it should be unobstructed direct return to reservoir with a minimum I.D. no less than that of case drain port on generator motor. ...
... ** External case drain line may be required on some units refer to specific model number. When external case drain is required it should be unobstructed direct return to reservoir with a minimum I.D. no less than that of case drain port on generator motor. ...
System Stability of Synchronous Machine with Small Signal
... 4.1 K-constants in the expanded form Expression for K constants in terms of the elements of matrix A is made. In the literature, they are usually expressed explicitly in terms of the various system parameters. The constants can be computed are : If the elements of matrix A are available, the K const ...
... 4.1 K-constants in the expanded form Expression for K constants in terms of the elements of matrix A is made. In the literature, they are usually expressed explicitly in terms of the various system parameters. The constants can be computed are : If the elements of matrix A are available, the K const ...
DC motor-1st Order
... calibration constant between the output voltage and the force. Multiplying this force by the moment arm of the armature gives the resulting torque. This is all done internally for you in the LabView routine. The current supplied to the motor may be calculate using ...
... calibration constant between the output voltage and the force. Multiplying this force by the moment arm of the armature gives the resulting torque. This is all done internally for you in the LabView routine. The current supplied to the motor may be calculate using ...
Sample Exam Solution
... Are there any pitfalls with this technique? How are they resolved? Solution: The residual flux in the magnetic material in the poles and rotor core will produce a l voltage on the armature windings when the machine is turning at rated speed (Ea = Kφω ). The small voltage will drive a small current t ...
... Are there any pitfalls with this technique? How are they resolved? Solution: The residual flux in the magnetic material in the poles and rotor core will produce a l voltage on the armature windings when the machine is turning at rated speed (Ea = Kφω ). The small voltage will drive a small current t ...
HA2312001206
... indirect flux control of brushless dc (BLDC) motor with non sinusoidal back electromotive force (EMF) has been extensively investigated. In this study, a novel and simple approach to achieve a low-frequency torque ripple-free direct torque control (DTC) with maximum efficiency based on dq reference ...
... indirect flux control of brushless dc (BLDC) motor with non sinusoidal back electromotive force (EMF) has been extensively investigated. In this study, a novel and simple approach to achieve a low-frequency torque ripple-free direct torque control (DTC) with maximum efficiency based on dq reference ...
reduction ratio
... Belts and pulleys. Toothed timing belts are quiet and easy to use, but they can take up too much space if multiple stages are needed. They normally require a tensioning mechanism. Sprockets and chains. Can handle high torque and are easy to use because of the loose tolerances required, but they can ...
... Belts and pulleys. Toothed timing belts are quiet and easy to use, but they can take up too much space if multiple stages are needed. They normally require a tensioning mechanism. Sprockets and chains. Can handle high torque and are easy to use because of the loose tolerances required, but they can ...
Gear Trains
... are far too high to be useful, and at torques that are far too low. Gear reduction is the standard method by which a motor is made useful. LEGO ...
... are far too high to be useful, and at torques that are far too low. Gear reduction is the standard method by which a motor is made useful. LEGO ...
Full-Text PDF - Accents Journal
... considerable amount of load in AC distribution system. However, most of the existing airconditioners are not energy efficient and thereby, provide a scope for energy conservation. Air-Cons in domestic sector are usually driven by a single-phase induction motor running at constant rated torque with o ...
... considerable amount of load in AC distribution system. However, most of the existing airconditioners are not energy efficient and thereby, provide a scope for energy conservation. Air-Cons in domestic sector are usually driven by a single-phase induction motor running at constant rated torque with o ...
Brushless Motors
... instructor before proceeding. The 50-Ω rheostat, R1, must initially be set to maximum resistance. R2 should remain at 50 Ω throughout the experiment ∂. b) ...
... instructor before proceeding. The 50-Ω rheostat, R1, must initially be set to maximum resistance. R2 should remain at 50 Ω throughout the experiment ∂. b) ...
Motor Type Selection
... The slope of the speed-torque line of a motor can be calculated from the no-load speed n0 and the stall torque MH values listed in the motor data sheets. The following equation applies: n/M = n0/MH. If the motor data sheet is unavailable, the slope of the speed-torque line can be calculated from a ...
... The slope of the speed-torque line of a motor can be calculated from the no-load speed n0 and the stall torque MH values listed in the motor data sheets. The following equation applies: n/M = n0/MH. If the motor data sheet is unavailable, the slope of the speed-torque line can be calculated from a ...
Motor Start Theory
... Motors consist of two major sections – The Stator and the Rotor The stator consists of magnetic poles and stator windings within the frame of the motor.By variation of winding configuration and the contour of the stator laminations , the full load characteristics are determined The motor speed is de ...
... Motors consist of two major sections – The Stator and the Rotor The stator consists of magnetic poles and stator windings within the frame of the motor.By variation of winding configuration and the contour of the stator laminations , the full load characteristics are determined The motor speed is de ...
How Servo control combines power and precision
... Servo drive systems are increasingly being used in place of a standard AC motor as they offer superior control. Characteristics such as a high power output to physical size ratio and fast acceleration, making them ideal for many applications. These include packaging, product handling, printing and o ...
... Servo drive systems are increasingly being used in place of a standard AC motor as they offer superior control. Characteristics such as a high power output to physical size ratio and fast acceleration, making them ideal for many applications. These include packaging, product handling, printing and o ...
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.