![]() ![]() Loops of wire are wound around slot in a metal coreĪre used in machines designed for low voltage and high current armatures are constructed with large wire because of high current Eg: - are used is in the starter motor of almost all automobiles The windings of a lap wound armature are connected in parallel. The windings of armatures are connected in different ways depending on the requirements of the machine. The entire assembly of iron core, commutator, and windings is called the armature. The commutator is connected to the slotted iron core. ![]() More loops of wire = higher rectified voltage In practical, loops are generally placed in slots of an iron core The iron acts as a magnetic conductor by providing a low-reluctance path for magnetic lines of flux to increase the inductance of the loops and provide a higher induced voltage. Major parts are rotor (armature) and stator (field). Principle of magnetic induction in DC machineĭC motors are everywhere! In a house, almost every mechanical movement that you see around you is caused by an DC (direct current) motor.Īn dc motor is a machine that converts electrical energy into mechanical energy by supplying a dc power (voltage and current). In this example, the ends of the wire loop have been connected to two slip rings mounted on the shaft, while brushes are used to carry the current from the loop to the outside of the circuit. While dc motors are widely used in many applications.Ī dc generator is a machine that converts mechanical energy into electrical energy (dc voltage and current) by using the principle of magnetic induction. DC generators are not as common as they used to be, because direct current, when required, is mainly produced by electronic rectifiers. ![]() Discuss the operating differences between different types of generators Understand the principle of DC generator as it represents a logical behavior of dc motors.ĭirect-current (DC) machines are divided into dc generators and dc motors. State the principle by which machines convert mechanical energy to electrical energy. Upon completion of the chapter the student should be able to: – – – Overview of Direct Current Machines Construction Principle of Operation Types of DC Motor Power Flow Diagram Speed Control ![]()
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