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

What is a Thyristor?Thyristor definitionSCR for short, is a high-power electrical component, also known as thyristor. It has the advantages of small size, high efficiency and long life. In the automatic control system, it can be used as a high-power driving device to realize the control of high-power equipment with low-power control. It has been widely used in AC and DC motor speed control system, power regulation system and servo system.Thyristor structureIt is composed of 4 layers of semicondu

What is an Ultrafast Recovery Diode?Ultrafast Recovery Diode definitionA semiconductor diode with good switching characteristics and ultra-short reverse recovery time is commonly used as a continuous current, absorption, clamping, isolation, output and input rectifier for the switching device of a high-frequency inverter, so that the function of the switching device can be fully brought into play. Ultrafast recovery diode is an important and indispensable device for the development of high-frequ

What is a Schottky Diode?Schottky Diode definitionThe reverse recovery time is extremely short (can be as small as a few nanoseconds), the positive pilot voltage drop is only about 0.4V, and the rectification current can reach thousands of amps, which can be used as a switching diode and a low-voltage high-current rectifier diode.Schottky Diode structureIt is formed by connecting doped semiconductor regions (usually N-type) with metals such as gold, platinum, titanium, etc. The formation is not

What is a Fast Recovery Power Diode?Fast recovery power diode definitionSemiconductor diodes with good switching characteristics and short reverse recovery time are mainly used in switching power supplies, PWM pulse width modulators, frequency converters and other electronic circuits as high-frequency rectifier diodes, continuous current diodes or damping diodes.Fast recovery power diode performance characteristics The reverse recovery time is short The reverse recovery charge is smallDetection

What is a Power Diode?Power DiodedefinitionBased on semiconductor PN, its on-off and off-off are completely determined by the voltage and current it undergoes in the main circuit, which can realize the function of positive on-off and reverse cutoff, and the power diode is an uncontrollable device.How Power Diodes workWhen the PN junction is applied with a forward voltage, that is, P→+, N→-, the external electric field is opposite to the internal electric field, and the diffusion motion is greate

What is a High Voltage Circuit Breaker?High Voltage Circuit Breaker definitionA type of circuit breaker used in power systems with a rated voltage of 35KV and above, used to cut or switch on loaded or unloaded circuits, as well as faulty circuits.High Voltage Circuit Breaker components Conductive part : responsible for the conduction of current ‌Insulation part : prevent electric shock accident ‌Operating mechanism : through the contact parting, ‌ closing action to realize the circuit to break a

What is the thermal effect of electric current?Definition of thermal effect of currentWhen the current passes through the resistance, the current does work and consumes electrical energy, generating heat.Calculation formulaQ=I^2 Rt I - The current passing through A conductor in amperes (A); R -- the resistance of the conductor, in ohms (Ω); t -- the time for the current to pass through the conductor, in seconds (s); Q - The heat generated by the current on the resistance, in joules (J)Apply Inca

What is Electromotive Force?Electromotive force definitionThe tendency of electrons to move overcomes the resistance of conductor resistance to current and causes charge to flow in a closed conductor loop.The electromotive forceThe work done by a non-electrostatic force to move a unit of positive charge from the negative side of the power supply through the interior of the power supply to the positive side of the power supply.Electromotive force directionFrom the negative terminal of the power s

What is Capacitive Reactance?Tolerance reactance definitionThe charge on the capacitor plate in an AC circuit has a hindering effect on the directional moving charge and is represented by the letter Xc.How the capacitive reactance worksWhen the capacitor is connected to the AC power supply, the free charge does not actually pass through the insulating medium between the two poles, but because the voltage between the two plates is changing, when the voltage rises, the charge accumulates on the pl

What is Induced Resistance?InductiveResistance definitionWhen a current passes through the coil, an induced electromagnetic field is formed in the coil, which in turn generates an induced current in the coil to resist the current passing through the coil. Therefore, we call this interaction between the current and the coil electrical reactance.Induced reactance calculation formulaXL= 2πfL=ωLInductive reaction The inductor coil has no hindering effect on DC current, and has hindering effect on AC