Frequently asked questions about FCMA soft starters
... steplessly to keep the motor current constant. The motor voltage typically ramps up to 95% as the motor reaches full speed. After closing the RUN contactor the motor voltage is equal to line voltage. 7. What is the starting current I can expect for my application? All reduced voltage soft starters w ...
... steplessly to keep the motor current constant. The motor voltage typically ramps up to 95% as the motor reaches full speed. After closing the RUN contactor the motor voltage is equal to line voltage. 7. What is the starting current I can expect for my application? All reduced voltage soft starters w ...
PDF
... the wind energy industry uses PMSG for direct gridconnection because it gives higher e ciency and has no slip ring maintenance. Thus, the lightweight and low maintenance features can be obtained in this type of wind power generation system [3], [4]. The con guration of PMSG wind power generation sys ...
... the wind energy industry uses PMSG for direct gridconnection because it gives higher e ciency and has no slip ring maintenance. Thus, the lightweight and low maintenance features can be obtained in this type of wind power generation system [3], [4]. The con guration of PMSG wind power generation sys ...
FREQUENTLY ASKED QUESTIONS – PERMANENT MAGNET AC
... Platinum e’s Service Factor (SF) is rated 1.0 on VFD power, which is in line with all other inverterduty induction motors. SF is an oft-times misunderstood concept, and its use is limited to NEMA motors (the IEC doesn’t recognize SF). Operating any motor beyond its rated power will result in additio ...
... Platinum e’s Service Factor (SF) is rated 1.0 on VFD power, which is in line with all other inverterduty induction motors. SF is an oft-times misunderstood concept, and its use is limited to NEMA motors (the IEC doesn’t recognize SF). Operating any motor beyond its rated power will result in additio ...
Variable Frequency Drives
... The starting current is very high, between 3 to 8 times the full load current. Depending on the size of the motor, this can result in voltage sags in the power system. The full torque is applied instantly at starting and the mechanical shock can eventually damage the drive system, particularly with ...
... The starting current is very high, between 3 to 8 times the full load current. Depending on the size of the motor, this can result in voltage sags in the power system. The full torque is applied instantly at starting and the mechanical shock can eventually damage the drive system, particularly with ...
Load Bank Energy Dissipation Units Chromalox
... Special construction materials can be used to suit applications like small hand-held portables or salt water environments. Chromalox load banks can also be designed and manufactured for hazardous areas. ...
... Special construction materials can be used to suit applications like small hand-held portables or salt water environments. Chromalox load banks can also be designed and manufactured for hazardous areas. ...
UNIT – 5 Explain the different starting methods for 3
... Methods (i) to (iv) are applicable to both squirrel-cage and slip ring motors. However, method (v) is applicable only to slip ring motors. In practice, any one of the first four methods is used for starting squirrel cage motors, depending upon ,the size of the motor. But slip ring motors are invaria ...
... Methods (i) to (iv) are applicable to both squirrel-cage and slip ring motors. However, method (v) is applicable only to slip ring motors. In practice, any one of the first four methods is used for starting squirrel cage motors, depending upon ,the size of the motor. But slip ring motors are invaria ...
Glossary of Crane Terminoloy
... An operator's compartment or platform on a pendant or radio controlled crane, having no permanently mounted electrical controls, in which an operator may ride while controlling the crane. Dynamic Lowering: A method of control by which the hoist motor is so connected in the lowering direction, that w ...
... An operator's compartment or platform on a pendant or radio controlled crane, having no permanently mounted electrical controls, in which an operator may ride while controlling the crane. Dynamic Lowering: A method of control by which the hoist motor is so connected in the lowering direction, that w ...
25471_energy_conversion_19
... 3-More steel in stator, greater amount of heat transfer 4- using special high grade steel with low hysteresis loss in stator 5- steel made of especially thin guage & high resistivity toreduce eddy current loss 6-rotor carefully machined to produce uniform air gap, reducing stray load losses ...
... 3-More steel in stator, greater amount of heat transfer 4- using special high grade steel with low hysteresis loss in stator 5- steel made of especially thin guage & high resistivity toreduce eddy current loss 6-rotor carefully machined to produce uniform air gap, reducing stray load losses ...
OPERATING MANUAL NX Series Driver
... stopping. The surface is hot and may cause a skin burn(s). Installation • To prevent the risk of damage to equipment, leave nothing around the driver that would obstruct ventilation. Connection • The driver’s data edit connector (CN4) and analog I/O signals connector (CN6) are not insulated. When gr ...
... stopping. The surface is hot and may cause a skin burn(s). Installation • To prevent the risk of damage to equipment, leave nothing around the driver that would obstruct ventilation. Connection • The driver’s data edit connector (CN4) and analog I/O signals connector (CN6) are not insulated. When gr ...
UNIT – 1 Explain the principle of operation of a DC Motor. ANS
... 3. (n / T) Characteristic The theoretical speed/ torque (c/s) may be derived from (1) and (2) above by obtaining the torque and speed for various values of current and plotting the co-ordinates on the speed/torque (c/s). The serieswound motor has a large torque when the current is large on starting. ...
... 3. (n / T) Characteristic The theoretical speed/ torque (c/s) may be derived from (1) and (2) above by obtaining the torque and speed for various values of current and plotting the co-ordinates on the speed/torque (c/s). The serieswound motor has a large torque when the current is large on starting. ...
Manual for Torque Module Type DMMAP und DMMAH for Alltrax
... ALLTRAX can be changed into a torque control which you are used from your traditional motor cycle. Different torque characteristics can be selected in 8 steps by switches. Easy to install: Connect the module interfaces in between the throttle sensor and the motor controller and fix the module on the ...
... ALLTRAX can be changed into a torque control which you are used from your traditional motor cycle. Different torque characteristics can be selected in 8 steps by switches. Easy to install: Connect the module interfaces in between the throttle sensor and the motor controller and fix the module on the ...
electrical drives and controls
... 3. Braking is very smooth. 33. What is meant by regenerative braking? In the regenerative braking operation, the motor operators as a generator, while it is still connected to the supply. Here, the motor speed is greater than the synchronous speed. Mechanical energy is converted into electrical ener ...
... 3. Braking is very smooth. 33. What is meant by regenerative braking? In the regenerative braking operation, the motor operators as a generator, while it is still connected to the supply. Here, the motor speed is greater than the synchronous speed. Mechanical energy is converted into electrical ener ...
Neptune - Simplex
... via direct numeric keypad entry. A comprehensive automation option is available which allows automatic load regulation via KW sensing such that the load bank automatically maintains a constant load on the generator. Load level, bandwidth, and timing are user programmable from the touchscreen. This f ...
... via direct numeric keypad entry. A comprehensive automation option is available which allows automatic load regulation via KW sensing such that the load bank automatically maintains a constant load on the generator. Load level, bandwidth, and timing are user programmable from the touchscreen. This f ...
neptune - Simplex, Inc.
... via direct numeric keypad entry. A comprehensive automation option is available which allows automatic load regulation via KW sensing such that the load bank automatically maintains a constant load on the generator. Load level, bandwidth, and timing are user programmable from the touchscreen. This f ...
... via direct numeric keypad entry. A comprehensive automation option is available which allows automatic load regulation via KW sensing such that the load bank automatically maintains a constant load on the generator. Load level, bandwidth, and timing are user programmable from the touchscreen. This f ...
3. SWITCHED RELUCTANCE MOTORS 3.1
... effect of keeping the inductance maximum and constant, and this inductance is known as aligned inductance, La. As there is no change in the inductance in this region, torque generation is zero even when a current is present in this interval. In spite of this fact, it serves a useful function by pro ...
... effect of keeping the inductance maximum and constant, and this inductance is known as aligned inductance, La. As there is no change in the inductance in this region, torque generation is zero even when a current is present in this interval. In spite of this fact, it serves a useful function by pro ...
Development of Microcontroller Based Speed Control Scheme of
... scheme. Three electrically equally spaced Hall sensors located over the three stator phases provide this information to the controller. These sensors usually provide either +5V (logic High) or 0V (logic Low) depending on whether the rotor pole is facing the particular sensor or not. In Proteus, sens ...
... scheme. Three electrically equally spaced Hall sensors located over the three stator phases provide this information to the controller. These sensors usually provide either +5V (logic High) or 0V (logic Low) depending on whether the rotor pole is facing the particular sensor or not. In Proteus, sens ...
instruction manual for dodge d-series clutch/brakes
... checks prove that proper voltages are being provided, then mechanical components of the unit should be checked to ensure the unit has not been damaged or improperly installed. A slight loss in torque may become evident as a clutch or brake nears the end of its normal life. Grease or oil contaminatio ...
... checks prove that proper voltages are being provided, then mechanical components of the unit should be checked to ensure the unit has not been damaged or improperly installed. A slight loss in torque may become evident as a clutch or brake nears the end of its normal life. Grease or oil contaminatio ...
internally regulated generators
... are checked for opens and shorts. Disconnect the positive and negative leads of the field being checked. Set the meter to ohms RX1 scale. Connect the meter leads to each coil lead, and the meter should indicate a resistance reading. (Resistance of compound field will read aproximately zero on most o ...
... are checked for opens and shorts. Disconnect the positive and negative leads of the field being checked. Set the meter to ohms RX1 scale. Connect the meter leads to each coil lead, and the meter should indicate a resistance reading. (Resistance of compound field will read aproximately zero on most o ...
Optimal design of switched reluctance motors
... speed the current regulator may become “saturated” and a certain amount of torque ripple develops. It must be pointed out that similar phenomena occur in permanent-magnet motors and induction motors driven from electronic inverters. If the current waveform must be controlled to follow a sinusoidal f ...
... speed the current regulator may become “saturated” and a certain amount of torque ripple develops. It must be pointed out that similar phenomena occur in permanent-magnet motors and induction motors driven from electronic inverters. If the current waveform must be controlled to follow a sinusoidal f ...
Servomotor Parameters and their Proper Conversion
... motor per phase (LØ: line-to-neutral) and the motor inductance (Lm) is presented as Lm/Ø (delta winding), then equivalent LØ (line-to-neutral, wye-wound) = (Lm/Ø_delta-wound/3). 3. For a wye (Y) wound winding, if presented with Rm=RØ (line-to-neutral), multiply RØ by 2 for the total resistance: Rm ( ...
... motor per phase (LØ: line-to-neutral) and the motor inductance (Lm) is presented as Lm/Ø (delta winding), then equivalent LØ (line-to-neutral, wye-wound) = (Lm/Ø_delta-wound/3). 3. For a wye (Y) wound winding, if presented with Rm=RØ (line-to-neutral), multiply RØ by 2 for the total resistance: Rm ( ...
Energy savings with AC VSDs and motors on pumps
... reason VSDs are sometimes referred to as frequency converters. The conversion from DC back to AC uses a system of calculated and controlled pulses referred to as pulse width modulation (PWM). This system allows the VSD output frequency and voltage to be controlled, thereby controlling motor speed. H ...
... reason VSDs are sometimes referred to as frequency converters. The conversion from DC back to AC uses a system of calculated and controlled pulses referred to as pulse width modulation (PWM). This system allows the VSD output frequency and voltage to be controlled, thereby controlling motor speed. H ...
Brushless DC Motor Model
... Although PSpice is designed as an electronic circuit simulator, you can also use it to simulate mechanical or electromechanical systems. Analog Behavioral Modeling makes simulating mechanical systems much simpler. An example of an electromechanical system which can benefit from PSpice simulation is ...
... Although PSpice is designed as an electronic circuit simulator, you can also use it to simulate mechanical or electromechanical systems. Analog Behavioral Modeling makes simulating mechanical systems much simpler. An example of an electromechanical system which can benefit from PSpice simulation is ...
AC motor & drive - syncronous
... speed characteristic is not needed? 4. Why can't a synchronous motor start by itself? 5. What techniques are available to start a synchronous motor? 6.What happens to a synchronous motor as its field current is varied? 7. A synchronous motor is operating at a fixed load. Once the field current is in ...
... speed characteristic is not needed? 4. Why can't a synchronous motor start by itself? 5. What techniques are available to start a synchronous motor? 6.What happens to a synchronous motor as its field current is varied? 7. A synchronous motor is operating at a fixed load. Once the field current is in ...
TORSIONAL INTERHARMONIC INTERACTION STUDY OF
... The oil and gas industry is moving toward mega-plant sizes especially with regard to liquefied natural gas (LNG) plants. For these applications large single-shaft radial compressors driven by gas turbines and/or large electrical synchronous motors are required. Converter-fed synchronous motors combi ...
... The oil and gas industry is moving toward mega-plant sizes especially with regard to liquefied natural gas (LNG) plants. For these applications large single-shaft radial compressors driven by gas turbines and/or large electrical synchronous motors are required. Converter-fed synchronous motors combi ...
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.