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Description : How GTO is advantages over SCR

Answer : i) It is turned-off by negative gate pulse. ii) No commutation circuit required, reducing the cost, size, weight and volume of the circuit. iii) As commutation choke is not used, the associated acoustic ... turn off time permits high switching frequency. v) It has higher di/dt rating at turn-off. 

Description : Draw a symbol and neat labeling V-I characteristics of GTO and explain its operation.

Answer : Ans: Symbol and V-I characteristics of GTO: Operation of GTO: i) As the applied anode to cathode voltage is increased above zero, very small current (leakage current) flows through the device. ... low voltage (VBRR). The reverse breakdown voltage is of the order of 20 to 30 volt only. 

Description : Draw the symbol of GTO and TRIAC.

Answer : 1) GTO: 2) TRIAC: 

Description : Is gate turn on mechanism of GTO is similar to conventional thyristor?

Answer : Yes gate turn on mechanism of GTO is similar to conventional thyristor.

Description : How is the GTO turned off? A) By using a commutation circuit B) By applying reverse gate pulse C) By using a latch-up circuit D) By reverse anode current pulse 

Answer : How is the GTO turned off? A) By using a commutation circuit B) By applying reverse gate pulse C) By using a latch-up circuit D) By reverse anode current pulse 

Description : basic gate drive circuit of GTO

Answer : basic gate drive circuit of GTO

Answer : GTO can be turned on by providing positive pulse to the gate terminal and it can be turn off by providing negative pulse to gate terminal.

Description : Draw the structural diagram of GTO. Explain briefly the switching behavior of GTO with the help of appropriate voltage and current waveform.

Answer : Gate Turn Off Thyristor (GTO) Conventional Thyristor can be turned on with gate terminal but can not turn off from gate terminal. But in case of Gate Turn Off Thyristor (GTO), we can turn it on and off ... subdivided as storage period (Ts), fall period (Tp) and tail period (Tt).

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