Load Commutated Chopper Circuit: In this method of Load Commutated Chopper Circuit, the load current flowing through the thyristor is made to become zero while the motor current is conducted by the free-wheeling diode. Figure…

## Current Commutated Chopper Circuit

Current Commutated Chopper Circuit: Figure 11.34 shows a Current Commutated Chopper Circuit. The main thyristor Th1 of the chopper is commutated by a current pulse generated in the commutation circuitry. The sequence of operation is…

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## Voltage Commutated Chopper Circuit

Voltage Commutated Chopper Circuit: This Voltage Commutated Chopper Circuit comprises an auxiliary thyristor Th2, a diode D, inductor L and capacitor C as shown in Fig. 11.32 wherein the total chopper circuitry has been outlined…

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## What is TRIAC?

What is TRIAC? | Symbolic Representation | VI Characteristics of TRIAC: What is TRIAC? - The full form of TRIAC is Triode for Alternating Current (TRIAC) or Triode for AC. It is a bilateral switch…

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## Variable Reluctance Stepper Motor Working Principle

Variable Reluctance Stepper Motor Working Principle: A Variable Reluctance Stepper Motor Working Principle consists of a single or several stacks of stators and rotors-stators have a common frame and rotors have a common shaft as…

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## Blocked Rotor Test of Induction Motor

Blocked Rotor Test of Induction Motor: This Blocked Rotor Test of Induction Motor is used to determine the series parameters of the Circuit Model Parameters of an induction motor. The circuit is similar to that…

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## No Load Test of Induction Motor

No Load Test of Induction Motor: In this No Load Test of Induction Motor, the motor is run on no-load at rated voltage and frequency. The applied voltage and current and power input to motor…

## Vector Control of Induction Motor

Vector Control of Induction Motor: The sole idea behind the vector control of induction motor is to have an electrical drive which must offer superior performance than widely used separately excited dc motor in industry.…

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## Types of Forced Commutation

Types of Forced Commutation: It was observed from the discussion on choppers and inverters that in thyristor systems fed from dc supply, the forward current does not pass through zero naturally and must therefore be…

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## What is Sinusoidal Pulse Width Modulation?

What is Sinusoidal Pulse Width Modulation?: In Sinusoidal Pulse Width Modulation the pulse-width instead of being uniform as in the waveform of Fig. 11.55 is a sinusoidal function of its angular position with respect to…

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