Electronic Hub

Starting of  Induction Motor A three phase Induction Motor is Self Starting. When the supply is connected to the stator of a three-phase induction motor, a rotating magnetic field is produced, and the rotor starts rotating and the induction motor starts. At the time of starting, the motor slip is unity, and the starting current is very large. The purpose of a starter is not to just start the motor, but it performs the two main functions. They are as follows. To reduce the heavy starting current To provide overload and under voltage protection. The three phase induction motor may be started by connecting the motor directly to the full voltage of the supply. The motor can also be started by applying a reduced voltage to the motor when the motor is started. The torque of the induction motor is proportional to the square of the applied voltage.Thus, a greater torque is exerted by a motor when it is started on full voltage than when it is started on the reduced voltage. There are three main

Types of Induction Motor There are mainly two types of induction motor on the basis of power supply, Single Phase Induction Motor and Three Phase Induction Motor. As their name suggests, 1 phase AC power supply is extended to single phase induction motor while three phase induction motor is connected to 3 phase AC power supply. Types of Single Phase Induction Motor: Again, single phase induction motor may be classified on the basis of their construction and starting methods. On this basis, they can be further categorized into following types: Split Phase Induction Motor Capacitor Start Induction Motor Capacitor Start Capacitor Run Induction Motor Shaded Pole Induction Motor Types of 3 Phase Induction Motor: A three phase induction motor (IM) has two major components, Stator and Rotor. Stator is the stationary part whereas Rotor is rotating part. Load is coupled to the rotor shaft of the motor. Three phase armature winding is wound on the stator. When balanced three phase current flows

Induction Motor: Working Principle, Types, & Definition What is an Induction Motor? An induction motor (also known as an asynchronous motor ) is a commonly used AC electric motor. In an induction motor, the electric current in the rotor needed to produce torque is obtained via electromagnetic induction from the rotating magnetic field of the stator winding. The rotor of an induction motor can be a squirrel cage rotor or wound type rotor. Induction motors are referred to as ‘asynchronous motors’ because they operate at a speed less than their synchronous speed. So first thing to understand – what is synchronous speed? Induction Motor Synchronous speed is the speed of rotation of the magnetic field in a rotary machine, and it depends upon the frequency and number poles of the machine. The induction motor always runs at speed less than its synchronous speed. The rotating magnetic field produced in the stator will create flux in the rotor, hence causing the rotor to r

Difference Between Charge & Current The most significant  difference  between the  charge  and the  current  is that the  charge  is the  physical property  of  matter , whereas the  current  is the  rate  of  flow  of  charges . Some other differences between charge and current are explained below in the tabular form. The electric charge is the physical property of matter which experiences the force when placed in an electric filed. It is of three types positive, negative and neutral. When these charges (generally electrons) move in the particular direction its generate current. And this current is used for illumination and mechanical works. Content: Charge Vs Current : Comparison Chart  Definition  Key Differences  Conclusion Comparison Chart : Basis For Comparison Charge Current Definition It is a physical property of particles which allow them to interact with each other. It is the rate of flow of charge particles (generally electrons). Force Experienc

Difference Between Voltage &  Current The voltage and current are the two major aspects of electricity.The voltage is the type of the electromagnetic force whose effect causes the flow of electrical current in the circuit. The magnitude of a voltage and current depends on each other, but these two terms are different from each other in some ways. One of the major differences between voltage and current is that the voltage is the difference between the two points and the current is the flow of electrical charges between these two points of an electric field. Some others differences between them are explained below in the comparison chart. Content: Voltage Vs Current : Comparison Chart Definition  Key Differences  Conclusion Comparison Chart : Basis for Comparison Voltage Current Definition Difference between two points of an electric field Flow of charges between two points Unit Volt Ampere Symbol V I Formula Field Created Magnetic Field Electrostat

Electric Current Definition : Electric current is defined as the rate of flow of negative charges of the conductor. In other words, the continuous flow of electrons in an electric circuit is called an electric current.The conducting material consists a large number of free electrons which move from one atom to the other at random. Unit of Current : Since the charge is measured in coulombs and time in seconds, so the unit of electric current is coulomb/Sec ( C/s ) or amperes ( A ). The amperes is the  SI  unit of the conductor. The  I  is the symbolic representation of the current. Current Folw  Q= 1 Coulomb; t = 1 Second; then I = 1A Thus, a wire is said to carry a current of one ampere when charge flows through it at the rate of one coulomb per second. When an electrical potential difference is applied across the metallic wire, the loosely attached free electrons start moving towards the positive terminal of the cell shown in the figure below. This continuous flow

Electronic Switches : The electronic switches are generally called as solid state switches because there are no physical moving parts and hence absence of physical contacts. Most of the appliances are controlled by semiconductor switches such as motor drives and HVAC equipments. There are different types of solid state switches are available in today market with different sizes and ratings. Some of these solid state switches include transistors, SCRs, MOSFETs, TRIACs and IGBTs. Bipolar Transistors : A transistor either allows the current to pass or it blocks the current as similar to working of normal switch. In switching circuits, transistor operates in cut-off mode for OFF or current blocking condition and in saturation mode for ON condition. The active region of the transistor is not used for switching applications. Both NPN and PNP transistors are operated or switched ON when a sufficient base current is supplied to it. When a small current flows though the base t