Network effects of line start permanent magnet synchronous motors
... network. Adverse effects of LS-PMSMs are particularly important as they could lead to problems with the supply voltage, or to excessive loading of the system. It is useful to know any favourable effects too, as these can be used in marketing the motor and in designing the local distribution system. ...
... network. Adverse effects of LS-PMSMs are particularly important as they could lead to problems with the supply voltage, or to excessive loading of the system. It is useful to know any favourable effects too, as these can be used in marketing the motor and in designing the local distribution system. ...
coil in a magnetic field - CMA
... The effect of a magnetic field on a current-carrying conductor multiplies if this conductor runs in turns. As the field has an effect on each single turn the forces are summing up according to the turns. The both opposite sides of the rectangular conductor are flown through by opposite currents. Is ...
... The effect of a magnetic field on a current-carrying conductor multiplies if this conductor runs in turns. As the field has an effect on each single turn the forces are summing up according to the turns. The both opposite sides of the rectangular conductor are flown through by opposite currents. Is ...
A motor control center
... See also: Motor soft starter A small motor can be started by simply plugging it into an electrical receptacle or by using a switch or circuit breaker. A larger motor requires a specialized switching unit called a motor starter or motor contactor. When energized, a direct on line (DOL) starter immed ...
... See also: Motor soft starter A small motor can be started by simply plugging it into an electrical receptacle or by using a switch or circuit breaker. A larger motor requires a specialized switching unit called a motor starter or motor contactor. When energized, a direct on line (DOL) starter immed ...
Technology Training that works
... shorted, one by one • As the motor reaches full speed, the whole bank of resistance is shorted out and the motor now runs alike a squirrel cage induction motor • Very much useful to develop high starting torque • Reduced starting current puts less burden on the power system ...
... shorted, one by one • As the motor reaches full speed, the whole bank of resistance is shorted out and the motor now runs alike a squirrel cage induction motor • Very much useful to develop high starting torque • Reduced starting current puts less burden on the power system ...
Chapter 16 Electromagnetism
... (2) Place the solenoid along east-west direction so that it is perpendicular to the earth’s magnetic field. (or, before making any measurement, adjust the potentiometer in the control box to set the millivoltmeter to zero.) (3) The current should be kept constant. (4) Slightly move the semiconductor ...
... (2) Place the solenoid along east-west direction so that it is perpendicular to the earth’s magnetic field. (or, before making any measurement, adjust the potentiometer in the control box to set the millivoltmeter to zero.) (3) The current should be kept constant. (4) Slightly move the semiconductor ...
Jim Hendershot - Coil Winding Expo
... for a generator application? The selection has a lot to do with the application but don’t forget the following points: The highest peak & continuous power efficiency is achieved with a Permanent Magnet Synchronous machine (motor or generator). Some applications cannot support the cost of magnets Inc ...
... for a generator application? The selection has a lot to do with the application but don’t forget the following points: The highest peak & continuous power efficiency is achieved with a Permanent Magnet Synchronous machine (motor or generator). Some applications cannot support the cost of magnets Inc ...
Document
... A technique to gain increased performance and modularity in control systems utilizing multiple computers or processors. ...
... A technique to gain increased performance and modularity in control systems utilizing multiple computers or processors. ...
2. electric motors - Bureau of Energy Efficiency
... Inventory is another consideration - Many large industries use standard equipment, which can be easily serviced or replaced, thereby reducing the stock of spare parts that must be maintained and minimizing shut-down time. This practice affects the choice of motors that might provide better energy pe ...
... Inventory is another consideration - Many large industries use standard equipment, which can be easily serviced or replaced, thereby reducing the stock of spare parts that must be maintained and minimizing shut-down time. This practice affects the choice of motors that might provide better energy pe ...
Motor Mastery University - Century Electric Motors
... are a few generating systems that produce two-phase current. When a motor is called “polyphase” it will usually use three-phase current. While there are both AC and DC motors, the most common type is the AC motor. ...
... are a few generating systems that produce two-phase current. When a motor is called “polyphase” it will usually use three-phase current. While there are both AC and DC motors, the most common type is the AC motor. ...
13 common causes of motor failure
... Winding insulation breakdown and bearing wear are the two most common causes of motor failure, but those conditions arise for many different reasons. This article demonstrates how to detect the 13 most common causes of winding insulation and bearing failure in advance. ...
... Winding insulation breakdown and bearing wear are the two most common causes of motor failure, but those conditions arise for many different reasons. This article demonstrates how to detect the 13 most common causes of winding insulation and bearing failure in advance. ...
Electricity Practical
... short wires. 2. a) Thick copper wires are good for carrying current because copper is a good conductor and thick wires have low resistance b) Long thin coils of nichrome are used in electric fires because nichrome has a high resistance causing it to heat up without melting ...
... short wires. 2. a) Thick copper wires are good for carrying current because copper is a good conductor and thick wires have low resistance b) Long thin coils of nichrome are used in electric fires because nichrome has a high resistance causing it to heat up without melting ...
and 2 - Faculty of Engineering
... by a magnetic circuit. When an alternating voltage is applied to one of these windings, an induced magnetic field is generated in the core, which then induces a voltage on the second winding. The winding at which the source is applied is called the primary winding, while the other winding is called ...
... by a magnetic circuit. When an alternating voltage is applied to one of these windings, an induced magnetic field is generated in the core, which then induces a voltage on the second winding. The winding at which the source is applied is called the primary winding, while the other winding is called ...
Commutator (electric)
A commutator is the moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called ""brushes"" made of a soft conductor like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings (coils of wire) on the armature are connected to the commutator segments. Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit. The first direct current commutator-type machine, the dynamo, was built by Hippolyte Pixii in 1832, based on a suggestion by André-Marie Ampère. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement. Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.