8. Induction motor
... At Starting 3-phase induction motor takes 5-7 times of full load current & starting torque being 1.5 to 2.5 times of full load torque. Due to this high current the winding of ...
... At Starting 3-phase induction motor takes 5-7 times of full load current & starting torque being 1.5 to 2.5 times of full load torque. Due to this high current the winding of ...
AC Generators I Notes
... The revolving-field type alternator has a stationary armature and a rotating magnetic field. Despite this major difference, the physics and the operation of the alternator is essentially the same as discussed for the elementary generator (a conductor in a magnetic field with relative motion between ...
... The revolving-field type alternator has a stationary armature and a rotating magnetic field. Despite this major difference, the physics and the operation of the alternator is essentially the same as discussed for the elementary generator (a conductor in a magnetic field with relative motion between ...
GAC is the name of a series of bipolar chopper drives, suitable for
... The wide range of current/voltage values optimizes the use of applications, with a great variety of stepping motors. ...
... The wide range of current/voltage values optimizes the use of applications, with a great variety of stepping motors. ...
Mtroniks Viper Marine 15 ESC
... The Marine15 has a 15Amp motor limit, what this means is that you can use any, DC Brushed motor, as long as the current drawn by that motor does not exceed 15Amps under load (with the prop connected, under water). The Marine15 is the perfect speed controller for anybody wanting to either upgrade the ...
... The Marine15 has a 15Amp motor limit, what this means is that you can use any, DC Brushed motor, as long as the current drawn by that motor does not exceed 15Amps under load (with the prop connected, under water). The Marine15 is the perfect speed controller for anybody wanting to either upgrade the ...
power devices and systems - McMaster University > ECE
... Parameter determination from laboratory test measurements Performance prediction - efficiency, voltage regulation Calculations in SI units, per unit and percent Three phase connections - three phase per unit calculations ...
... Parameter determination from laboratory test measurements Performance prediction - efficiency, voltage regulation Calculations in SI units, per unit and percent Three phase connections - three phase per unit calculations ...
Energy saving motors
... Pole-changing motors are designed for drives with constant torque characteristics and drives with quadratically rising torque because of the torque characteristics of the working machine. The motors can be calculated only for one rated voltage, for example 230 V, 400 V or 690 V. They are generally d ...
... Pole-changing motors are designed for drives with constant torque characteristics and drives with quadratically rising torque because of the torque characteristics of the working machine. The motors can be calculated only for one rated voltage, for example 230 V, 400 V or 690 V. They are generally d ...
Power electronics in ship propulsion electronic motors
... The line side converter takes power from a constant frequency (60 Hz) bus and produces a controlled DC voltage called DC link, on the same way as SCR - DC drive converter. In order to assure the appropriate induced voltage at the motor terminals, which is necessary to turn off the inverter thyrist ...
... The line side converter takes power from a constant frequency (60 Hz) bus and produces a controlled DC voltage called DC link, on the same way as SCR - DC drive converter. In order to assure the appropriate induced voltage at the motor terminals, which is necessary to turn off the inverter thyrist ...
P2‐CA‐NLH‐3 NLH 2012 Capital Budget Application Page 1 of 1 Re: Unit 1 and Unit 2 Generator Stator Rewind (Tab 2)
... components during overhaul work, and replacement items are on hand for this ...
... components during overhaul work, and replacement items are on hand for this ...
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 ...
Exercise 1 - Portal UniMAP
... 8. A 480 V 100 kW 0.85 PF leading 50 Hz six pole Y-connected synchronous motor has a synchronous reactance of 1.5 and a negligible armature resistance. The rotational losses are also to be ignored. This motor is to be operated over a continuous range of speeds from 300 to 1000 r/min, where the sp ...
... 8. A 480 V 100 kW 0.85 PF leading 50 Hz six pole Y-connected synchronous motor has a synchronous reactance of 1.5 and a negligible armature resistance. The rotational losses are also to be ignored. This motor is to be operated over a continuous range of speeds from 300 to 1000 r/min, where the sp ...
Electronic Soft Starters
... and supply giving only unsynchronised on-off control No control over inrush currents or torque surge at start up Very rapid acceleration of load with large transient forces placed on drive train and electrical system ...
... and supply giving only unsynchronised on-off control No control over inrush currents or torque surge at start up Very rapid acceleration of load with large transient forces placed on drive train and electrical system ...
EX-503put - Corporate Group of Institutes
... the alternator is 375 rpm. Calculate: EMF induced per phase . The resultant flux in the air gap is 0.05Wb per pole . Assume the coil span as 150 electrical degree. Q.8 A 3-phase ,1500KVA, star –connected,50Hz, 2300V alternator has a resistance between each pair of terminals as measured by direct cur ...
... the alternator is 375 rpm. Calculate: EMF induced per phase . The resultant flux in the air gap is 0.05Wb per pole . Assume the coil span as 150 electrical degree. Q.8 A 3-phase ,1500KVA, star –connected,50Hz, 2300V alternator has a resistance between each pair of terminals as measured by direct cur ...
Chapter-8 - Universities Press
... the main and the other is the auxiliary winding or starting winding. The motor uses a squirrel-cage rotor, which has a laminated iron core with slots in it. Singlephase induction motor is not self-starting and requires some mechanism to assist it in the starting process. ...
... the main and the other is the auxiliary winding or starting winding. The motor uses a squirrel-cage rotor, which has a laminated iron core with slots in it. Singlephase induction motor is not self-starting and requires some mechanism to assist it in the starting process. ...
March
... (b) Explain how section of an electrical system aboard ship can be isolated for maintenance work (c) Describe, with reference to electrical connections, the procedure to replace a 3-phase induction motor with spare motor 3. Describe the action of a diode valve and give an example of its use. 4. Whic ...
... (b) Explain how section of an electrical system aboard ship can be isolated for maintenance work (c) Describe, with reference to electrical connections, the procedure to replace a 3-phase induction motor with spare motor 3. Describe the action of a diode valve and give an example of its use. 4. Whic ...
DC Motors DC Motors
... Suspend a bar magnet and allow it to swing freely to either decide which end is the North seeking (N-pole) or confirm the given N-pole. ...
... Suspend a bar magnet and allow it to swing freely to either decide which end is the North seeking (N-pole) or confirm the given N-pole. ...
24-451 FEEDBACK CONTROL SYSTEMS
... d. (10 points.) Let the input voltage be a step function ur(t)=Au(t). Determine the value of A if the steady state speed of the train (i.e., at time t ) is to be maintained at 20. (Hint: use the Final Value Theorem of Laplace transforms.) ...
... d. (10 points.) Let the input voltage be a step function ur(t)=Au(t). Determine the value of A if the steady state speed of the train (i.e., at time t ) is to be maintained at 20. (Hint: use the Final Value Theorem of Laplace transforms.) ...
ELECTRIC MOTOR
... The reverse task, that of converting mechanical motion into electrical energy, is accomplished by a generator or dynamo. In many cases the two devices differ only in their application and minor construction details, and some applications use a single device to fill both roles. For example, traction ...
... The reverse task, that of converting mechanical motion into electrical energy, is accomplished by a generator or dynamo. In many cases the two devices differ only in their application and minor construction details, and some applications use a single device to fill both roles. For example, traction ...
MAGNASTART Slipring Motor Starters TM P O W E R
... MagnastartTM Inducers have no moving parts, and do not use liquids or chemicals. MagnastartTM will give many years of service without any maintenance or adjustment. ...
... MagnastartTM Inducers have no moving parts, and do not use liquids or chemicals. MagnastartTM will give many years of service without any maintenance or adjustment. ...
AC motor
An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings.Less commonly, linear AC motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation.