Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

What is Slew Rate?Slew Rate DefinitionIn electronics, the slew rate is defined as the maximum rate of output voltage change per unit time. It is denoted by the letter S. The slew rate helps us to identify the amplitude and maximum input frequency suitable to an operational amplifier (OP amp) such that the output is not significantly distorted.To achieve the best performance, the slew rate should be maximized, allowing for the greatest undistorted output voltage swing.The slew rate is crucial for

What are Photo Electrons?Photoelectron DefinitionA photoelectron is defined as an electron emitted from a material when it absorbs light energy. This emission process is called the photoelectric effect and it provides key evidence for the quantum nature of light and matter. This article will explain what photoelectrons are, how they are produced, factors affecting their emission, and their applications in science and technology.Photoelectric EffectThe photoelectric effect is the process where el

What are Valence Electrons and Electrical Conductivity ?Valence Electrons DefinitionAn atom is made up of a nucleus containing protons and neutrons, with electrons in shells around it. The nucleus is positively charged, and the electrons are negatively charged. Atoms are electrically neutral because they have equal numbers of protons and electrons.Electrons in an atom are arranged in shells based on their energy levels. The closest shell to the nucleus has the lowest energy, while the farthest s

What is an Optoisolator?Optoisolator DefinitionAn optoisolator (also known as an optocoupler or optical isolator) is defined as an electronic component that transfers electrical signals between two isolated circuits using light.Working PrincipleThe input circuit consists of a variable voltage source and an LED. The output circuit consists of a phototransistor and a load resistor. The LED and the phototransistor are enclosed in a light-tight package to prevent external interference.When the input

What is Schottky Effect?Schottky Effect DefinitionThe Schottky effect is defined as a reduction in the energy needed to remove electrons from a solid surface in a vacuum when an electric field is applied. This boosts electron discharge from heated materials and impacts the thermionic current, surface ionization energy, and photoelectric threshold. Named after Walter H. Schottky, this effect is crucial for electron emission devices like electron guns.Thermionic EmissionTo understand the Schottky

What is a Static Bypass Circuit?Static bypass definitionStatic bypass is an important part of the UPS system. Its main function is to switch the load from the UPS output path to the path directly powered by the mains when the UPS system fails or needs to be maintained.Working principleA static bypass typically consists of a set of bidirectional Thyristors that can be turned on or off quickly in milliseconds, allowing for seamless switching between the load and the UPS output. In normal working m

What is an Online UPS?On-line uninterruptible power supply definitionOnline uninterruptible power supply is a kind of equipment that can provide continuous, stable and clean power supply, mainly used in occasions with high power quality requirements, such as data centers, server rooms, medical equipment, precision instruments and so on.ComponentRectifier: Converts alternating current to direct current.Battery pack: Stores electrical energy to provide energy in the event of a mains interruption.I

What is an Uninterruptible Power Supply?Uninterruptible power supply definitionAn uninterruptible power supply is a device capable of providing a continuous power supply with the primary purpose of protecting critical loads from grid outages, voltage fluctuations, frequency changes, and other power quality issues.The basic components of uninterruptible power supply: Battery pack: provides backup power to the UPS. When the mains power fails, the battery pack can supply power to the load. Charger:

What is an Inverter?Inverter definitionAn Inverter (Inverter) is an electronic device that converts direct current (DC) to alternating current (AC).Basic principle of inverterThe basic principle of the inverter is to use electronic switching devices (such as IGBT, MOSFET, etc.) to chop the direct current into a series of pulse voltages, and then smooth these pulse voltages into alternating current through a filter.Working processDc input: The inverter receives input from DC power sources such as