Fill in the blanks for questions (i-iv) below and solve the question asked in qu

Question

Fill in the blanks for questions (i-iv) below and solve the question asked in question (v). i) The advantages of a sine wave PWM inverter over a square wave inverter are ii) In a c class-D amplifier, an input signal is amplified by iii) The benefits of a transistor snubber circuit are: iv) The purpose of a transistor turn-off snubber circuit is to v) The purpose of a transistor turn-on snubber circuit is to vi) A power electronic converter uses an IGBT with the following specifications: R_theta, jc = 1 degree C/W, R_0, ca = 40 degree C/W, T_j, max = 150 degree C. Also, the power dissipated by the IGBT is given by P_diss = 10 + 0.001 fs, where fs denotes the switching frequency. Assuming the ambient temperature is 40 degree C, what is the maximum switching frequency at which the IGBT can be operated without a heat sink?

Explanation / Answer

i) It gives steady outputvoltage.

This inverter is ideal for all types of loads.

Protection and voltage control is possible.

ii) Input signal is amplified by a transistor. Here the signal is not linearly amplified. only the radio frequency portion of the input signal is amplified.

iii) transistor snubber circuit is used to Reduces the voltage transients.

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