Welcome to electrical and electronics engineering Q&A site...

Welcome to electrical and electronics engineering discussion website, Please login or register to continue.

Join our WhatsApp group

Subscribe To Our YouTube Channel

in Unit 1 by
parallel operation of MOSFET can be done more easily as compared to thyristor. why?

Amazon Shopping

Please log in or register to answer this question.

1 Answer

0 votes
Best answer
Parallel operation of MOSFET can be done more easily as compared to thyristor because the resistance of MOSFET is increases with increase in temperature. MOSFET have the positive temperature coefficient. In positive temperature coefficient, the resistance increases with increase in temperature and in case of negative temperature coefficient resistance decrease with increase in temperature. Due to the positive temperature coefficient of MOSFET if we connect MOSFET in parallel and if the current in particular MOSFET increases then due to losses the temperature in that particular MOSFET will be increased. This increase in temperature will also increase the internal resistance of that particular MOSFET, therefore, the current in that particular MOSFET will also decrease this thing will balance the current in MOSFETs.

But in case of a thyristor which is a negative temperature coefficient device. So due to negative temperature coefficient, the resistance in the thyristor will decrease when the temperature of thyristor will increase this causes more current to flow due to low resistance.Hence the parallel operation of MOSFET can be done more easily as compared to the thyristor.

Amazon Shopping

Welcome to Q&A site for electrical and electronics engineering discussion for diploma, B.E./B.Tech, M.E./M.Tech, & PhD study.
If you have a new question please ask in English.
If you want to help this community answer these questions.


Most popular tags

power motor dc circuit transformer voltage current used system phase factor resistance load synchronous energy ac induction generator electric series frequency capacitor use speed between electrical meter line type mosfet control transmission difference magnetic plant high single instrument bjt source advantages function diode machine unit winding torque amplifier define supply thyristor motors arduino field shunt maximum relay armature problem electricity time parallel on transformers types coil diagram state flow value material three starting and direction theorem method emf operating digital microprocessor test instruments efficiency ratio loss measure operation connected low applications wave effect single-phase working losses different network wattmeter temperature measuring constant signal controlled breaker device full compare drive wire resistivity logic materials machines inductance switch flux disadvantages converter transistor gain protection scr angle force core measurement number free principle rc generators law negative bridge friction open pole conductor conservation steam iron loop resistors hysteresis short computer using lines secondary station battery rectifier inverter linear relays nuclear regulation circuits design analog work rotor electronics gate forces diesel damping rlc connection factors capacitors minimum insulation basic moving running reactance systems air fault range direct main stability quality starter igbt eddy ideal ammeter rl 3-phase plants arc induced thermal error fuzzy biasing dielectric pressure balanced superposition errors rotation characteristics feedback measured electronic start alternator off back curve over solar three-phase tariff locomotive peak bias zener capacitance commutator surge rating universal potentiometer permanent mechanical copper self transducer capacity electrons memory adc excitation inductive transfer explain fuse pure harmonics application inductor internal pmmc average reaction welding resonance traction breakers designed electromagnetic si generation brushes density switching shaded rate impedance distribution methods star oscillator reluctance semiconductor simplification algebra 8085 boolean weston dynamometer insulating strength installation permeability definition fuel heating earth units neutral rms rated engineering conductors coefficient controller usually reverse excited analysis change body components