experiment - Portal UniMAP
... The low torque values at low speeds are due to the fact that the currents induced in the rotor produce magnetic fields that create forces which act on the rotor in various directions. Most of these forces cancel each other and the resulting force acting on the rotor is weak. This explains why the si ...
... The low torque values at low speeds are due to the fact that the currents induced in the rotor produce magnetic fields that create forces which act on the rotor in various directions. Most of these forces cancel each other and the resulting force acting on the rotor is weak. This explains why the si ...
Alternating Current Motors
... mechanical power but are increasingly being used in variable speed-control applications. • Advantages: They are popular because they can provide rotary power with high efficiency, low maintenance, and exceptional reliability—all at relatively low cost. • These desirable qualities are the result of t ...
... mechanical power but are increasingly being used in variable speed-control applications. • Advantages: They are popular because they can provide rotary power with high efficiency, low maintenance, and exceptional reliability—all at relatively low cost. • These desirable qualities are the result of t ...
Ski 2006-Part1
... …to start a motor, without jeopardizing the power source, and bring it to it’s fully rated horsepower Only then will a pump provide rated pressure and flow to satisfy the design requirements. ...
... …to start a motor, without jeopardizing the power source, and bring it to it’s fully rated horsepower Only then will a pump provide rated pressure and flow to satisfy the design requirements. ...
How step-motor performance
... connected to the ends if the four coils that make up the phase windings. The coils can be connected in series or in parallel to operate with a bipolar drive, or in series with a center tap run from a unipolar drive. Relationships between motor parameters when using these connections are summarized i ...
... connected to the ends if the four coils that make up the phase windings. The coils can be connected in series or in parallel to operate with a bipolar drive, or in series with a center tap run from a unipolar drive. Relationships between motor parameters when using these connections are summarized i ...
Rotor side Control of High Power Slip Ring Induction Motor using a
... associated start windings to give the initial rotation in a single phase induction motor. The normal running windings within such a motor can cause the rotor to turn in either direction, so the starting circuit determines the operating direction. The four methods of starting an induction motor are d ...
... associated start windings to give the initial rotation in a single phase induction motor. The normal running windings within such a motor can cause the rotor to turn in either direction, so the starting circuit determines the operating direction. The four methods of starting an induction motor are d ...
SET 1 - contentcarry
... In general, eddy currents occur in conductors that experience a change of flux. This flux change can be due either to the mechanical motion in a magnetic field as in the armature of a motor, or to a changing current in the wires wound around the soft iron core of a transformer. In both cases, eddy ...
... In general, eddy currents occur in conductors that experience a change of flux. This flux change can be due either to the mechanical motion in a magnetic field as in the armature of a motor, or to a changing current in the wires wound around the soft iron core of a transformer. In both cases, eddy ...
DC Motor Drives - Universiti Teknologi Malaysia
... 0 to base armature voltage, above base field flux reduction Armature voltage control Field flux control ...
... 0 to base armature voltage, above base field flux reduction Armature voltage control Field flux control ...
Name of presentation - Energy Postgraduate Conference 2013
... • Future generation from renewable sources will employ rotating electrical machines as generators. • Constant & variable speed generators connected to the grid at the sub-transmission and distribution level. • Generator performance and power system stability studies are of interest. • Two questions: ...
... • Future generation from renewable sources will employ rotating electrical machines as generators. • Constant & variable speed generators connected to the grid at the sub-transmission and distribution level. • Generator performance and power system stability studies are of interest. • Two questions: ...
DEHRADUN INSTITUTE OF TECHNOLOGY LABORATORY MANUAL PRACTICAL INSTRUCTION SHEET
... Objective: - To study running (starting) and reversing of 3-phase induction motor. Apparatus Used: - One 3-phase Induction motor, One 3-phase Autotransformer, One Voltmeter(0500V) & One Ammeter(0-10A). Theory: At the time of starting, a 3-phase induction motor draws heavy current. This heavy current ...
... Objective: - To study running (starting) and reversing of 3-phase induction motor. Apparatus Used: - One 3-phase Induction motor, One 3-phase Autotransformer, One Voltmeter(0500V) & One Ammeter(0-10A). Theory: At the time of starting, a 3-phase induction motor draws heavy current. This heavy current ...
Simple electrical engineering projects
... the electromagnet to attract it to the next position. • It’s a bit like the way a four stroke car engine works. ...
... the electromagnet to attract it to the next position. • It’s a bit like the way a four stroke car engine works. ...
... e) Use the LINEST function in Excel to fit a line to your voltage and speed data. You must provide LINEST with a set of known x-values (in this case, the speed values) and a set of known y-values (in this case, the voltages). LINEST will return the slope of the line that best fits the data. In term ...
M Connector Option
... Dangerous voltages exist so use extreme caution when operating this equipment. Sufficient energy remains in the DDM-XXX to cause motion even with the power removed. To verify that the equipment is safe, insure that the voltage across the DC+ and DCterminals is at 0VDC. At startup, reduce the positiv ...
... Dangerous voltages exist so use extreme caution when operating this equipment. Sufficient energy remains in the DDM-XXX to cause motion even with the power removed. To verify that the equipment is safe, insure that the voltage across the DC+ and DCterminals is at 0VDC. At startup, reduce the positiv ...
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 ...
Speed control of wound rotor induction motors by AC regulator
... same circuit can be used as a starter speed control and loss minimization. This is a cheap, simple and efficient method for speed control of induction motors even at low torque and low speed requirements. Thus, the same high power wound rotor moor can be operated efficiently even at low speed and lo ...
... same circuit can be used as a starter speed control and loss minimization. This is a cheap, simple and efficient method for speed control of induction motors even at low torque and low speed requirements. Thus, the same high power wound rotor moor can be operated efficiently even at low speed and lo ...
Motor Insulation Class Life
... The term, temperature “rise”, means that the heat produced in the motor windings (copper losses), friction of the bearings, rotor and stator losses (core losses), will continue to increase until the heat dissipation equals the heat being generated. For example, a continuous duty, 40°C rise motor wil ...
... The term, temperature “rise”, means that the heat produced in the motor windings (copper losses), friction of the bearings, rotor and stator losses (core losses), will continue to increase until the heat dissipation equals the heat being generated. For example, a continuous duty, 40°C rise motor wil ...
working of schrage motor
... Same obtained changing the phase angle of the injected voltage into the secondary winding. In this case one set of brushes is advanced more rapidly than the other set. Now the two center lines do not coincide, have an angle ‘ρ’ between them. (“ρ” – Brush shift angle) Fig (d) : Brush set is mov ...
... Same obtained changing the phase angle of the injected voltage into the secondary winding. In this case one set of brushes is advanced more rapidly than the other set. Now the two center lines do not coincide, have an angle ‘ρ’ between them. (“ρ” – Brush shift angle) Fig (d) : Brush set is mov ...
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.