K Power Solutions

IGBT and MOSFET are   Power Transistor both are voltage controlled device with isolated Gate. IGBT- Insulated Gate Bipolar Transistor. IGBT suitable for high voltage, low frequency application. IGBT has additional p-n junction and giving it properties of Both MOSFET and BJT.    IGBT terminal- Gate, Collector, Emitter. Available Voltage rating of IGBT is up to 1400 Volts. IGBT can be used frequency rating up to 20 kHz. IGBT required more time to turn off. It is highly tolerant to Electrostatic discharge.   IGBT has lower forward voltage drop. IGBT has great capacity of handling transient voltage and current. IGBT cost is more. MOSFET- Metal-Oxide Semiconductor Filed Effect Transistor   MOSFET suitable for low voltage and high frequency application. MOSFET doesn't have a p-n junction MOSFET terminal- Gate, Drain, Source. Available Voltage rating of MOSFET is up to 600 Volts. MOSFET can be used frequency rating up to 50kHz. MOSFET required less time to ...

Power Electronics is combination of Power, electronics and Control. It is primarily based on switching of power semiconductor devices. Development in Power handling capacity and switching speed of power device improving rapidly. Power electronics tooks very important place in modern technology and used in many applications and high power products. Some popular Applications- 1-Electric Vehicle 2-Furnace 3-High Frequency Lightings 4-High voltage DC 5-Heat Control 6-Laser Power supply 7-Motor control 8-Voltage regulator  Power Semiconductor devices- Since 1970 various types of power semiconductor devices were developed, which are made up of silicon or silicon carbide. Silicon carbide Device are still under development, majority of devices are made from Silicon. Classification of Power semiconductor devices- 1- Power Diodes 2- Thyristors 3- Transistors 1-Diodes It has 2 terminal cathode and anode. Diode conduct when anode voltage is greater than cathode and forward voltage drop of diod...

Harmonic are an unwanted distorted waveform which frequency is higher than the fundamental frequency. It is an integer multiplication of fundamental frequency. Electrical equipment are rated in 50 Hz frequency. Effects of Harmonics in Power System? 1-The high frequency signal cause decreasing the performance of the system. 2-It creates inefficiencies in equipment operations due to the increased need for power consumption, Overheating of electrical system and transformers. 3-It is also cause of failures in sensitive electronic devices like PLC and CNC devices Used in Industry. 4-The increase of overall current required creates higher installation and utility costs, and decreasing profitability. 5-It reduces Power quality, Reduces Power factor and Low power factor directly affects on electricity bill as all DISCOM company charges Penalty for not maintaining Power Factor. Causes of Harmonics- Generally harmonic are produced by nonlinear electronics loads, Non- Linear Loads - When current...

Electrical choke is a coil or Inductor. When someone can't breathe we say person is choke means flow of air is stopped. Same working principle is for electrical choke, Some energy which we want to choke or prevent from flowing to circuit. Characteristics of Choke: 1- It store electrical energy in a form of magnetic field. 2- Resistance of choke coil is very low, therefore no power loss in circuit.  3- Inductive reactance changes with change in frequency, It is directly proportional      X L= 2πFL 4- Choke coil may produce Electromagnetic Interference due to continuously changing in current. Applications of Choke : 1-The main function choke coil is it allows flow of Direct current or low-frequency Alternating Current and to block the high-frequency Alternating Current. 2- Choke coils are used in electronic circuits to reduce Electromagnetic Interference. 3- Choke coils are used in power supply circuits such as voltage regulators, rectifier circuits, inverter circuits,...

Low voltage circuit breaker Circuit breaker is automatically operated electromechanical device used for the protection of the circuit from overloading or short circuit. It breaks or opens the circuit when the current flowing through it exceeds its rated limit Circuit breakers used for breaking & making circuits below 1000 volts are called low voltage circuit breakers. According to IEC, low voltage refers to voltage below 1000 volts. LV circuit breakers are mostly used for residential & industrial applications. Commonly used low voltage AC circuit breakers are, 1- Miniature Circuit Breaker (MCB) MCB is used for the protection of low voltage circuit 240/415 v AC having a wide range of current ratings below 125 Amp. MCB can trip short circuit currents up to 10 kAmp in 2.5 milliseconds. There is a time delay between fault occurrence & the breaking of contacts. MCB are designed to have a time delay of 2 sec to 2 min for overloading.   Before selecting MCB it is need to sure ...

All electrical devices are rated based on the maximum power it can consumes, generates or transfer. Transformers are rated in kVA or VA . Transformers are an energy transfer device that transfers power from the primary side to the secondary side without changing frequency. Why transformers are rated in kVA and why not it is rated in kW like heater, motor and other electrical equipments? 1- Copper loss in transformer depends on the current and the iron loss depends upon the voltage of the transformer. Total losses in a transformer depend upon volt-ampere (VA) only and not on the power factor of the load.This is the reason transformer is rated in KVA and not in KW 2- Transformers are manufactured without considering the load being connected. So any kind of electrical load can be connected it may be resistive, capacitive, inductive or combination loads. If the transformer is rated in KW, there may be confusions regarding the type of load being connected. That is why the transformer ratin...