Capacitors in rectifier circuits are connected in parallel primarily to filter out the AC component of the rectified voltage. When AC is rectified into DC by diodes, there are residual ripples or fluctuations in the DC voltage. Capacitors connected in parallel smooth out these ripples by storing charge when the voltage is high and releasing … Read more
Running an Air Conditioner with Low Voltage: Air conditioners are designed to operate within a specific voltage range, typically around 208 to 230 volts for residential units. When the voltage supplied to an air conditioner drops below the recommended operating range, several issues can arise. The compressor, which is the main component responsible for cooling, … Read more
In a fan, especially in ceiling fans and similar appliances, capacitors are typically used to control the speed of the motor. Capacitors in fan motors are often part of the motor’s starting and running circuits. They help in creating phase shifts in the motor windings, which is essential for generating the rotating magnetic field required … Read more
Meaning of Recovery Time in Diodes: Recovery time in diodes refers to the time taken by a diode to transition from conducting to non-conducting state (or vice versa) after a change in voltage polarity or current flow. It specifically applies to the reverse recovery time in semiconductor diodes, where the diode switches from forward conduction … Read more
PSM stands for Pickup Setting Multiplier. It refers to a parameter used in protective relays to set the pickup or threshold level for detecting a fault condition. The PSM is usually a ratio or multiplier applied to the nominal current setting of the relay. For example, if the relay’s nominal current setting is 100A and … Read more
To decrease the consumption of a diesel generator, it’s essential to focus on optimizing its efficiency and ensuring proper maintenance. Regular maintenance, such as changing filters, checking and cleaning injectors, and ensuring the cooling system is functioning correctly, helps keep the generator running efficiently. Load management is also crucial; running the generator at its optimal … Read more
Stray Capacitance and Stray Inductance: Stray capacitance and stray inductance refer to unintended or undesired electrical properties that exist in circuits or components due to their physical layout or construction. Stray capacitance occurs when there is an unintended capacitance between conductors or between a conductor and ground. This capacitance can affect circuit performance by introducing … Read more
A single-phase induction motor operates on the principle of electromagnetic induction to produce rotational motion. When AC voltage is applied to the motor’s stator windings, it creates a rotating magnetic field. In a single-phase motor, this rotating magnetic field is not inherently present due to the single-phase supply, so auxiliary mechanisms are used to create … Read more
Dark current in a photodiode refers to the small current that flows through the photodiode even when no light is incident on it. This current arises due to thermal generation of charge carriers within the semiconductor material of the photodiode. In the absence of photons (light), electrons and holes are still thermally generated and can … Read more
A single-phase induction motor is not self-starting due to its asymmetric winding arrangement and the absence of a rotating magnetic field during startup. Unlike three-phase induction motors that inherently produce a rotating magnetic field from the balanced currents in their three windings, single-phase motors have only one main winding and an auxiliary winding (or shading … Read more