Corrections? After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Let us know if you have suggestions to improve this article (requires login). At low speeds, some current from the generator is used to boost the generator’s magnetic field, thereby increasing voltage output. A Linear Voltage Regulator ensures the output voltage from the circuit is maintained at a specific voltage. The device acts as a variable resistor, continuously adjusting to maintain a constant output voltage. Set the multimeter to voltage. There are two types of voltage regulators: linear and switching. Attach the red wire to the input and the black wire to the ground, the multimeter should give a reading higher than the regulators' output value. Simple voltage regulator contains a Zener Diode and a resistor but more complicated versions include elements like a voltage reference and error amplifiers. Prime members enjoy fast & free shipping, unlimited streaming of movies and TV shows with Prime Video and many more exclusive benefits. This article was most recently revised and updated by, https://www.britannica.com/technology/voltage-regulator. At still higher speeds, the circuit is switched off, lowering the magnetic field. Types of Voltage Regulators Fixed voltage regulator. …with built-in rectifiers and a voltage regulator to match the generator output to the electric load and also to the charging requirements of the battery, regardless of engine speed.…, Electric circuit, path for transmitting electric current. This makes sure that even when a load is applied the voltage doesn’t drop. An electric circuit includes a device that gives energy to the charged particles constituting the current, such as a battery or a generator; devices that use current, such as lamps, electric motors, or computers; and the connecting wires or…. Such a device is widely used in motor vehicles of all types to match the output voltage of the generator to the electrical load and to the charging requirements of the battery. Our website uses cookies and similar technologies to provide you with a better service while searching or placing an order, for analytical purposes and to personalise our advertising to you. Voltage regulator, any electrical or electronic device that maintains the voltage of a power source within acceptable limits. A voltage regulator generates a fixed output voltage of a preset magnitude that remains constant regardless of changes to its input voltage or load conditions. In motor vehicles, voltage regulators rapidly switch from one to another of three circuit states by means of a spring-loaded, double-pole switch. The primary feature in choosing a regulator is usually the Output voltage as the main purpose of one is to regulate the voltage to a specific value such as 3.3V. Sorry, there was a problem saving your cookie preferences. A more specific type of regulator are Low Dropout Voltage Regulators (LDO) which can regulate voltage even when the power supply voltage is very close to the supply voltage. Updates? If not then there is a power supply issue. Announcing our NEW encyclopedia for Kids! Turn the dial or press a button on your ohm or multimeter and set it to … STMicroelectronics, 15 V Linear Voltage Regulator, 1.5A, Electronics Components, Power & Connectors. The two digits after the 78 represent the output voltage of the regulator, for example the 7805 is a 5V regulator and the 7812 is a 12V regulator. The voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage. STMicroelectronics L78 Series of fixed output voltage regulators ... 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Thus, a voltage regulator is used for two reasons:- Try again. The regulated voltage must be lower than the input voltage. Two types of regulators are used: step regulators, in which switches regulate the current supply, and induction regulators, in which an induction motor supplies a secondary, continually adjusted voltage to even out current variations in the feeder line.

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