By Valentine Sybille.

Power. Publised at Sunday, November 26th 2017, 07:35:26 AM. This hierarchy means that a linear regulator will normally try to operate in "constant voltage" mode, where the voltage error amplifier is regulating the output voltage to a fixed value. However, this assumes that both the load current and junction temperature are below their limit threshold values.

By Alix Loane.

Motor. Published at Saturday, December 30th 2017, 00:13:39 AM. Eddy current and hysteresis heating are collectively called iron losses. The former induces currents in the iron of the motor while the latter is caused by the re-alignment of the magnetic domains in the iron. You can think of this as “friction heating” as the magnetic dipoles in the iron switch back and forth. Either way, both cause the bulk heating of the motor. Iron losses are a function of AC current and therefore the power supply voltage.

By Alix Loane.

Motor. Published at Friday, December 29th 2017, 20:40:03 PM. Inductance (L) has a property called inductive reactance, which for the purposes of this discussion may be thought of as a resistance proportional to frequency and therefore motor speed. According to Ohm’s law, current is equal to voltage divided by resistance. In this case we substitute inductive reactance for resistance in Ohm’s law and conclude motor current is the inverse of motor speed. Since torque is proportional to ampere-turns (current times the number of turns of wire in the winding), and current is the inverse of speed, torque also has to be the inverse of speed. In an ideal step motor, as speed approaches zero, its torque would approach infinity while at infinite speed torque would be zero. Because current is proportional to torque, motor current would be infinite at zero as well.

By Madeleine Catherine.

Car Wiring. Published at Friday, December 29th 2017, 19:35:53 PM. Modern cars often need room for many wires in confined spaces. Some manufacturers now use printed circuits instead of bundles of wires, particularly at the rear of the instrument panel. Printed circuits are plastic sheets on which copper tracks have been "printed". Components are plugged directly into the tracks. A few modern cars have flexible printed circuits. The copper tracks are printed in ribbons of flexible plastic, which replace the whole wiring system.

By Lydie Honorine.

Motor. Published at Friday, December 29th 2017, 17:00:56 PM. The easiest factor in choosing a power supply is its current rating, which is based on your motor ratings. A motor control will always draw less than 2/3 of the motor’s rated current when it is parallel (or half-winding) connected and 1/3 of the motor’s rated current when it is series (or full-winding) connected. That is to say, a 6 amp per phase motor will require a 4 amp power supply when wired in parallel and a 2 amp power supply when wired in series. If multiple motors and drives are used, add the current requirements of each to arrive at the total power supply current rating.

By Alix Loane.

Car Wiring. Published at Friday, December 29th 2017, 16:59:56 PM. Plan the route of the wires. There are some wires that should not come in close proximity to other wires. The radio wires must be kept clear of the ignition wires to reduce interference.

By Bertille Solange.

Car Wiring. Published at Friday, December 29th 2017, 14:22:05 PM. All of the ground wires in the cockpit can be run to the forward frame grounding post and the battery ground can be run to the frame at the rear or wherever you mount the battery. The exception in his case is the ignition ground, which he runs separate from the other ground wires directly to the battery ground.

By Bertille Solange.

Motor. Published at Friday, December 29th 2017, 13:36:08 PM. The easiest factor in choosing a power supply is its current rating, which is based on your motor ratings. A motor control will always draw less than 2/3 of the motor’s rated current when it is parallel (or half-winding) connected and 1/3 of the motor’s rated current when it is series (or full-winding) connected. That is to say, a 6 amp per phase motor will require a 4 amp power supply when wired in parallel and a 2 amp power supply when wired in series. If multiple motors and drives are used, add the current requirements of each to arrive at the total power supply current rating.

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