ECET 3500
... can have the number of its turns increased or decreased in order to control the speed of the motor may be connected in series with an external, variable resistor to provide a method of speed control will have the same current flowing through it that is flowing through the machine’s rotor windings al ...
... can have the number of its turns increased or decreased in order to control the speed of the motor may be connected in series with an external, variable resistor to provide a method of speed control will have the same current flowing through it that is flowing through the machine’s rotor windings al ...
SNSCT Course ware: EE211 Electrical Machines
... ~ D.C. series motor = D.C. shunt motor ~ universal motor ~ none of the above :: What will happen if the relative speed between the rotating flux of stator and rotor of the induction motor is zero ? ~ The slip of the motor will be 5% = The rotor will not run ~ The rotor will run at very high speed ~ ...
... ~ D.C. series motor = D.C. shunt motor ~ universal motor ~ none of the above :: What will happen if the relative speed between the rotating flux of stator and rotor of the induction motor is zero ? ~ The slip of the motor will be 5% = The rotor will not run ~ The rotor will run at very high speed ~ ...
The speed controls of three phase induction motor from rotor side
... is that with addition of external resistance starting torque increases but this method of speed control of three phase induction motor also suffers from some disadvantages : 1. The speed above the normal value is not possible. 2. Large speed change requires large value of resistance and if such larg ...
... is that with addition of external resistance starting torque increases but this method of speed control of three phase induction motor also suffers from some disadvantages : 1. The speed above the normal value is not possible. 2. Large speed change requires large value of resistance and if such larg ...
UNIT – III Induction Motor Drives
... and the prime movers such as diesel or petrol engines, gas or steam turbines, steam engines, hydraulic motors and electric motors, for supplying mechanical energy for motion control and drives employing electric motors are known as electrical drives. 2. Specify the functions of power modulator. Powe ...
... and the prime movers such as diesel or petrol engines, gas or steam turbines, steam engines, hydraulic motors and electric motors, for supplying mechanical energy for motion control and drives employing electric motors are known as electrical drives. 2. Specify the functions of power modulator. Powe ...
Instructions for Slo-Syn_en-US_RevA
... SLO-SYN Micro Series drives use modem solid-state electronics such as microprocessors to provide the features needed for advanced motion control applications. In some cases, these applications produce electromagnetic interference (EMI, or electrical “noise”) that may cause inappropriate operation of ...
... SLO-SYN Micro Series drives use modem solid-state electronics such as microprocessors to provide the features needed for advanced motion control applications. In some cases, these applications produce electromagnetic interference (EMI, or electrical “noise”) that may cause inappropriate operation of ...
Digital Control of Permanent Magnet Synchronous Motors
... There is an extreme way of eliminating the above disadvantages. This way absolutely passes over the unit inducing the problem (the speed or position encoder) and sets up a speed control system without any mechanical sensor. These drives are generally referred to as “sensorless electrical drives”. ...
... There is an extreme way of eliminating the above disadvantages. This way absolutely passes over the unit inducing the problem (the speed or position encoder) and sets up a speed control system without any mechanical sensor. These drives are generally referred to as “sensorless electrical drives”. ...
Aalborg Universitet "Active flux" orientation vector sensorless control of IPMSM
... does not need any additional signal, but does not operate at zero speed. There are a lot of different estimation methods in this category. Some of them, using the Kalman filter, MRAC [20] or the INFORM method [21] allow low and zero speed operation, but are apparently too complex and expensive to be ...
... does not need any additional signal, but does not operate at zero speed. There are a lot of different estimation methods in this category. Some of them, using the Kalman filter, MRAC [20] or the INFORM method [21] allow low and zero speed operation, but are apparently too complex and expensive to be ...
Motor torque, load torque and selection of motors
... 1.2 (Equation (1.3)). But high rotor resistance will mean high running slip, causing greater rotor losses and heat in the rotor circuit. The solution to this problem is found in a double squirrel cage motor. In such motors the rotor has two cages, one closer to the periphery of the rotor and the oth ...
... 1.2 (Equation (1.3)). But high rotor resistance will mean high running slip, causing greater rotor losses and heat in the rotor circuit. The solution to this problem is found in a double squirrel cage motor. In such motors the rotor has two cages, one closer to the periphery of the rotor and the oth ...
Overview of motors and motion control
... Stepper motors consist of a doubly salient structure (teeth on both the rotor and stator) and are used primarily in applications requiring precise position control which cannot justify the cost of expensive position feedback sensors. Stepper motors are a fairly new motor type, designed as a replacem ...
... Stepper motors consist of a doubly salient structure (teeth on both the rotor and stator) and are used primarily in applications requiring precise position control which cannot justify the cost of expensive position feedback sensors. Stepper motors are a fairly new motor type, designed as a replacem ...
1 “How to Turn an AC Induction Motor Into a DC... Steve Bowling
... AC induction motors (ACIM) have distinct advantages over other types of motors, and have typically been used when a robust, fixed-speed solution is desired. The evolution of microcontroller (MCU) and power electronic devices has made inexpensive variablespeed control of an ACIM possible. However, th ...
... AC induction motors (ACIM) have distinct advantages over other types of motors, and have typically been used when a robust, fixed-speed solution is desired. The evolution of microcontroller (MCU) and power electronic devices has made inexpensive variablespeed control of an ACIM possible. However, th ...
250-0096 - Alstron
... • Mount the drive away from heat sources. Operate the drive within the specified ambient operating temperature range. • Prevent loose connections by avoiding excessive vibration of the drive. • Mount drive with its board in either a horizontal or vertical plane. Six 0.19 in. (5 mm) wide slots in the ...
... • Mount the drive away from heat sources. Operate the drive within the specified ambient operating temperature range. • Prevent loose connections by avoiding excessive vibration of the drive. • Mount drive with its board in either a horizontal or vertical plane. Six 0.19 in. (5 mm) wide slots in the ...
Basics on electric motors
... wire causes some mechanical device to rotate. The core principle underlying motors is electromagnetic induction. By Ampere’s law, the current induces a magnetic field, which can interact with another magnetic field to produce a force, and that force can cause mechanical motion. A motor is basically ...
... wire causes some mechanical device to rotate. The core principle underlying motors is electromagnetic induction. By Ampere’s law, the current induces a magnetic field, which can interact with another magnetic field to produce a force, and that force can cause mechanical motion. A motor is basically ...
Asynchronous performance analysis of a single
... The induced currents in the rotor bars during the asynchronous operation will interact with the stator fluxlinkages and a cage torque will be produced. This torque ensures the starting capabilities of LSPMM. However, the permanent magnetization of the rotor makes starting more difficult. Current gen ...
... The induced currents in the rotor bars during the asynchronous operation will interact with the stator fluxlinkages and a cage torque will be produced. This torque ensures the starting capabilities of LSPMM. However, the permanent magnetization of the rotor makes starting more difficult. Current gen ...
ELECTRIC DRIVES
... • DC motors - permanent magnet – wound field • AC motors – induction, synchronous (IPMSM, SMPSM), brushless DC • Applications, cost, environment • Natural speed-torque characteristic is not compatible with load requirements Power sources • DC – batteries, fuel cell, photovoltaic - unregulated • AC – ...
... • DC motors - permanent magnet – wound field • AC motors – induction, synchronous (IPMSM, SMPSM), brushless DC • Applications, cost, environment • Natural speed-torque characteristic is not compatible with load requirements Power sources • DC – batteries, fuel cell, photovoltaic - unregulated • AC – ...
variable speed drives and motors a gambica technical guide
... will always be based on the maximum possible output from the drive, with the worst case ambient temperature. This may well represent a level substantially higher than normally encountered due to the need to cater for short time overload situations in equipment with potentially very short thermal tim ...
... will always be based on the maximum possible output from the drive, with the worst case ambient temperature. This may well represent a level substantially higher than normally encountered due to the need to cater for short time overload situations in equipment with potentially very short thermal tim ...
International Electrical Engineering Journal (IEEJ) Vol. 6 (2015) No.X, pp. XX-XX
... electronics semiconductor devices based inverters. These inverters widely called Pulse Width Modulation (PWM) Inverters. These inverters provide us capability to vary the frequency of the voltage supplies in the relatively easy way. As a result, the induction motor can be used in the variable speed ...
... electronics semiconductor devices based inverters. These inverters widely called Pulse Width Modulation (PWM) Inverters. These inverters provide us capability to vary the frequency of the voltage supplies in the relatively easy way. As a result, the induction motor can be used in the variable speed ...
K Direct Torque Control of Induction Motor Using Space
... Starting torque is very low and efficiency is also reduced. Such shaded-pole motors are typically used in low-power applications with low or zero starting torque requirements, such as desk fans and record players. Larger motors are provided with a second stator winding which is fed with an out-of-ph ...
... Starting torque is very low and efficiency is also reduced. Such shaded-pole motors are typically used in low-power applications with low or zero starting torque requirements, such as desk fans and record players. Larger motors are provided with a second stator winding which is fed with an out-of-ph ...
Dynamic Braking Using External Resistors
... Dynamic braking is a method of quickly dissipating the rotational energy stored in a servomotor/machine system when the power is removed from the servodrive. Without dynamic braking, the energy is dissipated as frictional losses in the system. In a well-built machine, such frictional losses may be r ...
... Dynamic braking is a method of quickly dissipating the rotational energy stored in a servomotor/machine system when the power is removed from the servodrive. Without dynamic braking, the energy is dissipated as frictional losses in the system. In a well-built machine, such frictional losses may be r ...
- Pcpolytechnic
... When the instrument is used as an ammeter, an external low resistance called shunt is connected in parallel with the movement so that net resistance of the instrument is very low and the instrument can be connected in series with any equipment whose current is to be measured. Due to low resistan ...
... When the instrument is used as an ammeter, an external low resistance called shunt is connected in parallel with the movement so that net resistance of the instrument is very low and the instrument can be connected in series with any equipment whose current is to be measured. Due to low resistan ...
time domain analysis of induction motor starting transients
... The capacitor size must be determined according to the terminal impedance of the auxiliary winding. Unfortunately, this impedance changes dramatically from the starting to the running condition. Hence, it is not practical to use only one fixed value capacitor for both starting and running. If both t ...
... The capacitor size must be determined according to the terminal impedance of the auxiliary winding. Unfortunately, this impedance changes dramatically from the starting to the running condition. Hence, it is not practical to use only one fixed value capacitor for both starting and running. If both t ...
Synchronous speed
... Reluctance motor designs have ratings that range from fractional horsepower (a few watts) to about 22 kW. Very small reluctance motors have low torque, and are generally used for instrumentation applications. Moderate torque, integral horsepower motors use squirrel cage construction with toothed rot ...
... Reluctance motor designs have ratings that range from fractional horsepower (a few watts) to about 22 kW. Very small reluctance motors have low torque, and are generally used for instrumentation applications. Moderate torque, integral horsepower motors use squirrel cage construction with toothed rot ...
18 Center of gravity.
... through a rotating door at the same time, one on the l.h.s. of the rotator and one the r.h.s. of the rotator. If the forces are applied as shown in the drawing, what ...
... through a rotating door at the same time, one on the l.h.s. of the rotator and one the r.h.s. of the rotator. If the forces are applied as shown in the drawing, what ...
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.