Tricky but Easy Electrical Engineering!
A four quadrant chopper is a chopper which can operated in all the four quadrants. The power can flow either from source to load or load to source in this chopper. In first quadrant, a Class-E chopper acts as a Step-down chopper whereas in second quadrant it behaves as a Step-up chopper. This type of … Read more
Class-D or Type-D chopper is a circuit configuration of chopper in which power can flow in either direction i.e. from source to load and load to source. The operation of this chopper is confined in first and fourth quadrant. This type of chopper is also known as Two quadrant Type-B Chopper. The necessary condition for … Read more
The main difference between a GTO and an SCR is that a GTO can be turned OFF by the application of gate signal whereas SCR can cannot be switched OFF by gate signal. To turn OFF an SCR, a separate commutation circuit is required whereas a Gate Turn Off thyristor can be made OFF by … Read more
Class-C or Type-C Chopper is a category of chopper which can operate in first as well as second quadrant. This basically means that, the power can either flow from source to load or load to source in this chopper. This kind of chopper is also known as Two Quadrant Class-A chopper. In this article, we … Read more
Introduction: Class-B or Type-B chopper is defined as the chopper in which the direction of power flow is always from load to source. The operation of this chopper is confined in the second quadrant. This is the reason; it is also known as Second Quadrant Chopper. In second quadrant chopper, the output voltage is positive … Read more
Class-A or Type-A chopper is defined as the chopper in which the direction of power flow is always from source to load. The operation of this chopper is always in first quadrant. This is the reason; it is also known as First Quadrant Chopper. In this type of chopper, the output voltage and load current … Read more
The quadrant operation of chopper is basically the circuit configuration so adjusted to achieve the chopper voltage Vo and output current Io in all the four quadrants. A chopper can be operated in all four quadrants by employing required circuit configuration. We know that, a chopper is a semiconductor power electronic device. Again, a … Read more
This article outlines the definition, working principle and derivation & formula for average output voltage of a Step-down Chopper. The working principle has been discussed in detail with the help of circuit diagram & output voltage waveform. Definition: A Step-down chopper is a static device that step downs its DC input voltage. The value of … Read more
This article describes the advantage and disadvantage of GTO ( Gate Turn Off Thyristor) over conventional thyristor or SCR. Disadvantage: Following are the disadvantage of a GTO as compared to a conventional thyristor: The magnitude of latching and holding current is more than that of a SCR. The value of latching current is around 2 … Read more
Switching characteristics of a Gate Turn Off Thyristor or GTO comprises of dynamic characteristics during Turn ON and Turn OFF process. It basically represents the variation in anode voltage Va and anode current Ia when either positive or negative gate signal Ig is applied. Turn On Characteristic of GTO: Turn on process in GTO is … Read more