Tricky but Easy Electrical Engineering!
What is Gate Turn Off Thyristor (GTO)? A Gate Turn Off Thyristor (GTO) is a power semiconductor device which can be turned ON and OFF by applying gate current. It is basically a pn pn device which is tuned ON by applying positive gate current and turned off by negative gate current at its gate … Read more
The main difference between a step-up and step-down chopper is that average value of output voltage of former is greater than its input DC voltage whereas it is less than the DC input voltage for latter. This is the basic but major functional difference between the two. Step-down and step-up choppers are static devices which … Read more
Definition: Step-up chopper is a static device whose average output DC voltage is greater than its input DC voltage. It is different from the step-down chopper. In step-down chopper, the average value of output voltage stepped down i.e. it is less than its input voltage. Working Principle of Step-up Chopper: To understand the working principle, … Read more
Current Limit Control is one of the output voltage control strategy of chopper. In this method, the ON and OFF time of chopper circuit is governed by the previously set value of load current. This technique is different form Time Ratio Control method. In this technique, the chopper is switched ON when the load current … Read more
There are mainly two techniques or methods to control the output voltage of a chopper: Time Ratio Control Method and Current Limit Control. The output voltage of chopper depends on the duty cycle. By changing the duty cycle, the output voltage can be varied. Both the methods, employ some technique to vary the duty cycle. … Read more
Definition: Complex Power is basically the representation of electrical power in the form of complex number. Like a complex number, it consists of real and imaginary part. Real part represents the active power whereas the imaginary part represents the reactive power. It is generally represented by symbol S. If active and reactive power be P … Read more
What is a Chopper? A chopper is a static device that converts fixed DC input voltage to a variable DC output voltage. It is basically a high speed ON/OFF semiconductor switch. It may be thought of as DC equivalent of an AC transformer since they behave in an identical manner. Chopper is fed through a … Read more
Active and Passive elements are two different types of circuit element. This classification is based on the capability of circuit element to deliver energy either in the form of voltage or current. If a circuit element has the capability to deliver energy to the circuit, it is called Active element whereas if the element consumes … Read more
Unilateral and Bilateral Elements are the two different types of electrical / electronic circuit element on the basis of their V-I characteristics on reversal of voltage polarity. This article describes Unilateral and Bilateral Elements and circuit in detail with relevant diagrams. Unilateral Elements: Unilateral elements in electrical circuit is defined as the element whose V-I … Read more
Definition: Impedance Triangle is a right angled triangle whose base, perpendicular and hypotenuse represents Resistance, Reactance and Impedance respectively. It is basically a geometrical representation of circuit impedance. Explanation of Impedance Triangle: Impedance consists of two components viz. resistance and reactance. Therefore, it can be expressed in these two components. Let the impedance of an … Read more