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

Regenerative BrakingIn regenerative braking, the kinetic energy of the driven machinery is harnessed and fed back into the power supply mains. This braking mechanism comes into play when the driven load or machinery compels the motor to operate at a speed exceeding its no - load speed while maintaining constant excitation.Contents Applications of Regenerative Braking Regenerative Braking in DC Shunt Motors Regenerative Braking in DC Series MotorsUnder the conditions of regenerative braking, a si

DefinitionAn optical fiber is a slender, flexible strand crafted from glass (silica) or plastic, designed specifically for the transmission of optical (light) signals. Despite its delicate appearance, an optical fiber typically has a diameter larger than that of a human hair.More precisely, an optical fiber functions as a waveguide, enabling the transmission of electromagnetic waves in the form of light at optical frequencies. This unique property allows it to carry information over long distanc

Commissioning Tests for Generator Circuit BreakersOnce a Generator circuit breaker has been installed, comprehensive commissioning tests must be conducted. The primary objectives of these tests are to: Ensure that no damage has occurred during transportation and storage. Verify the compatibility of individual components. Confirm that the assembly has been carried out correctly. Validate the proper performance of the fully assembled generator circuit breaker.Verification of Generator Circuit Brea

Excitation SystemDefinitionAn excitation system is a crucial component in synchronous machines, tasked with supplying the requisite field current to the rotor winding. Put simply, it is designed to generate magnetic flux by passing an electric current through the field winding. Key attributes that define an ideal excitation system include unwavering reliability across all operational scenarios, straightforward control mechanisms, ease of maintenance, stability, and a rapid transient response.The

The Split Phase Motor, alternatively referred to as a Resistance Start Motor, features a single - cage rotor. Its stator is equipped with two distinct windings: the main winding and the starting winding. These two windings are spatially displaced by 90 degrees, a configuration that plays a crucial role in the motor's operation.The main winding is characterized by its very low resistance and high inductive reactance, while the starting winding exhibits the opposite characteristics, with high resi

Two Phase AC Servo MotorIn a previous article, we've already explored servo motors. In this one, we'll focus on two - phase and three - phase AC servo motors.The stator of a two - phase AC servo motor is equipped with two distributed windings. These windings are electrically displaced from each other by 90 degrees. One of these windings is called the reference or fixed phase. It is powered by a constant - voltage source, ensuring a stable electrical input. The other winding is known as the contr

A chopper is a device that converts a fixed direct - current (DC) voltage into a variable DC voltage. Self - commutated devices, such as Metal - Oxide - Semiconductor Field - Effect Transistors (MOSFETs), Insulated - Gate Bipolar Transistors (IGBTs), power transistors, Gate - Turn - Off Thyristors (GTOs), and Integrated Gate - Commutated Thyristors (IGCTs), are commonly used in the construction of choppers. These devices can be turned on or off directly via a gate control signal using low - powe

High Continuous Current LevelsGenerator Circuit Breakers (GCBs) are required to handle high continuous current levels over extended periods. To meet this demand, they necessitate a continuous cooling system for the conductors. This cooling mechanism ensures that the conductors can operate within a safe temperature range, preventing overheating and potential damage, thereby maintaining the reliability and efficiency of the GCBs during long - term high - current operations.Unique Fault Current Con

DefinitionA drive that utilizes electrical power to propel forward is known as an electric traction drive. One of the primary applications of an electric drive is the transportation of people and goods from one location to another. Traction drives are predominantly categorized into two types: the single - phase AC traction drive and the DC traction drive.Electric Traction ServicesElectric traction services can be broadly categorized as follows: Electric trains Main - Line Trains Suburban Trai

Five core functions of Distribution automation systems①Fault IsolationFast isolation of fault section,reduce the scope of power cuts,avoid overridetrip and expand the outage scope.②Fault locationLocate fault section accurately,shorten the time of troubleshooting.③Alarm PushPush the fault type,fault time and switch position to the responsible person'smobile phone and monitoring center in time.④Monitoring AnalysisReal-time monitoring of load current,voltage,switch state,three-phaseunbalance,overlo