Thermal Management of Electric Machines - MacSphere
... The Inter-Laminate Cooling concept is developed with application to an iron core inductor which serves as a proxy for the electric machine. The experimental results confirmed the capability of the method, expressed by the effectiveness, which defines the performance measure of the applied cooling me ...
... The Inter-Laminate Cooling concept is developed with application to an iron core inductor which serves as a proxy for the electric machine. The experimental results confirmed the capability of the method, expressed by the effectiveness, which defines the performance measure of the applied cooling me ...
UNIT 17 MOTOR CONTROL
... NEC Table 430-91 gives NEMA enclosure types for motor starters, listing the outdoor and indoor conditions ...
... NEC Table 430-91 gives NEMA enclosure types for motor starters, listing the outdoor and indoor conditions ...
Electric Field Simulations and Analysis for High Voltage High Power
... isolation within the SST [11]. Durable insulation is especially important for high power high voltage transformers since high electric stress leads to partial discharge and the breakdown of transformers [12], and the breakdown of transformers usually leads to costly repair or replacement [13]. The c ...
... isolation within the SST [11]. Durable insulation is especially important for high power high voltage transformers since high electric stress leads to partial discharge and the breakdown of transformers [12], and the breakdown of transformers usually leads to costly repair or replacement [13]. The c ...
Andrzej M. Trzynadlowski-Control of Induction Motors (Electrical and
... or a V-belt transmission, and the associated control equipment such as power converters, switches, relays, sensors, and microprocessors, constitute an electric drive system. It should be stressed that, as of today, most induction motor drives are still basically uncontrolled, the control functions l ...
... or a V-belt transmission, and the associated control equipment such as power converters, switches, relays, sensors, and microprocessors, constitute an electric drive system. It should be stressed that, as of today, most induction motor drives are still basically uncontrolled, the control functions l ...
Fujitsu Components Engineering Reference Relays
... the relays with a larger current capacity should be comparatively large. 1.2.4 Polarized latching and non-latching relays As to the operating characteristic of these relays, the non-latching relay is restored when the coil is deenergized after it is once energized to make the relay actuated. In cont ...
... the relays with a larger current capacity should be comparatively large. 1.2.4 Polarized latching and non-latching relays As to the operating characteristic of these relays, the non-latching relay is restored when the coil is deenergized after it is once energized to make the relay actuated. In cont ...
Manual-HC4-7-english.. - Powertech Engines Inc
... which will result in the generator being subjected to vibration levels higher than those derived from the generator itself. Newage generators are designed to withstand the vibration levels encountered on generating sets built to meet the requirements of ISO 8528-9 and BS5000-3. (Where ISO 8528 is ta ...
... which will result in the generator being subjected to vibration levels higher than those derived from the generator itself. Newage generators are designed to withstand the vibration levels encountered on generating sets built to meet the requirements of ISO 8528-9 and BS5000-3. (Where ISO 8528 is ta ...
Fuse Sizing Guide - OMEGA Engineering
... Some EDISON fuses, such as rectifier protection fuses, special purpose fuses, etc., do not show safety organization logos because test standards do not exist, or logo’s are awaiting testing for newly established standards. In these cases, any necessary additional information may be obtained from the ...
... Some EDISON fuses, such as rectifier protection fuses, special purpose fuses, etc., do not show safety organization logos because test standards do not exist, or logo’s are awaiting testing for newly established standards. In these cases, any necessary additional information may be obtained from the ...
Inductance in DC Circuits
... • When a battery is connected across a "pure" inductance, the current builds up to its final value at a rate determined by the battery voltage and the internal resistance of the battery. • The current buildup is gradual because of the counter emf generated by the self-inductance of the coil. • When ...
... • When a battery is connected across a "pure" inductance, the current builds up to its final value at a rate determined by the battery voltage and the internal resistance of the battery. • The current buildup is gradual because of the counter emf generated by the self-inductance of the coil. • When ...
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.