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  1. Capacitor - Wikipedia › wiki › Capacitor

    A capacitor is a device that stores electric charge in an electric field.It is a passive electronic component with two terminals.. The effect of a capacitor is known as capacitance.

  2. Capacitor types - Wikipedia › wiki › Capacitor_types

    Capacitors for AC applications are primarily film capacitors, metallized paper capacitors, ceramic capacitors and bipolar electrolytic capacitors. The rated AC load for an AC capacitor is the maximum sinusoidal effective AC current (rms) which may be applied continuously to a capacitor within the specified temperature range.

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  4. Capacitor - Simple English Wikipedia, the free encyclopedia › wiki › Capacitor

    A capacitor (also called condenser, which is the older term) is an electronic device that stores electric energy. It is similar to a battery, but can be smaller, lightweight and a capacitor charges or discharges much quicker.

  5. Electrolytic capacitor - Wikipedia › wiki › Electrolytic_capacitor

    An electrolytic capacitor is a polarized capacitor whose anode or positive plate is made of a metal that forms an insulating oxide layer through anodization.This oxide layer acts as the dielectric of the capacitor.

  6. Ceramic capacitor - Wikipedia › wiki › Ceramic_capacitor

    A ceramic capacitor is a fixed-value capacitor where the ceramic material acts as the dielectric.It is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes.

  7. Motor capacitor - Wikipedia › wiki › Motor_capacitor
    • Overview
    • Start capacitors
    • Run capacitors
    • Dual run capacitors
    • Labeling
    • Failure modes

    A motor capacitor, such as a start capacitor or run capacitor is an electrical capacitor that alters the current to one or more windings of a single-phase alternating-current induction motor to create a rotating magnetic field. There are two common types of motor capacitors: run capacitors and start capacitors. Motor capacitors are used with air conditioners, hot tub/jacuzzi spa pumps, powered gates, large fans or forced-air heat furnaces for example. A "dual run capacitor" is used in some air c

    Start capacitors briefly increase motor starting torque and allow a motor to be cycled on and off rapidly. A start capacitor stays in the circuit long enough to rapidly bring the motor up to a predetermined speed, which is usually about 75% of the full speed, and is then taken out of the circuit, often by a centrifugal switch that releases at that speed. Afterward the motor works more efficiently with a run capacitor. Start capacitors usually have ratings above 70 µF, with four major ...

    Some single-phase AC electric motors require a "run capacitor" to energize the second-phase winding to create a rotating magnetic field while the motor is running. Run capacitors are designed for continuous duty while the motor is powered, which is why electrolytic capacitors are avoided, and low-loss polymer capacitors are used. Run capacitors are mostly polypropylene film capacitors and are energized the entire time the motor is running. Run capacitors are rated in a range of 1.5 to 100 ...

    A dual run capacitor supports two electric motors, with both a fan motor and a compressor motor. It saves space by combining two physical capacitors into one case. The dual capacitor has three terminals, labeled C for common, FAN, and HERM for hermetically-sealed compressor. Dual capacitors come in a variety of sizes, depending on the capacitance, such as 40 plus 5 µF, and also on the voltage. A 440-volt capacitor can be used in place of a 370-volt, but not a 370-volt in place of a 440 ...

    The units of capacitance are labeled in microfarads. Older capacitors may be labeled with the obsolete terms "mfd" or "MFD" which can be ambiguous but are, especially in this context, used for microfarad as well.

    A faulty run capacitor often becomes swollen, with the sides or ends bowed or bulged out further than usual; it can then be clear to see that the capacitor has failed, because it is swollen or even blown apart causing the capacitor's electrolyte to leak out. Some capacitors have a "pressure sensitive interrupter" design that causes them to fail before internal pressures can cause serious injury. One such design causes the top of the capacitor to expand and break internal wiring.

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