Electrical4U What is a DC Motor? An electric motor operated by DC (direct current) is known as a DC motor (unlike an induction motor that operates via an alternating current). A DC motor converts DC electrical energy into mechanical energy. Principle of DC Motor When a current-carrying conductor is placed in a magnetic field, it experiences … Read more
Energy cannot be created or destroyed, only transferred from one form to another. In a DC machine, mechanical energy converts into electrical energy. However, not all input power becomes output power; some is lost in various forms. These losses cause the machine to heat up and reduce its efficiency. There are four main categories of … Read more
When a DC machine is loaded either as a motor or as a generator, the rotor conductors carry current. These conductors lie in the magnetic field of the air gap. Thus each conductor experiences a force. The conductors lie near the surface of the rotor at a common radius from its center. Hence torque is … Read more
DC motors play a crucial role in modern industry. Understanding the working principle of a DC motor, which we explore in this article, begins with its fundamental single loop construction.The very basic construction of a DC motor contains a current carrying armature, connected to the supply end through commutator segments and brushes. The armature is … Read more
What is an SF6 Circuit Breaker An SF6 circuit breaker is a type of circuit breaker in which sulphur hexafluoride gas or SF6 gas is used as the arc quinching medium, known as an SF6 circuit breaker. SF6 gas has excellent insulating properties and high electronegativity, meaning it strongly attracts free electrons. It absorbs electrons … Read more
A DC motor is a device that converts direct current electrical energy to mechanical energy (learn about a DC motor’s working principle). A DC motor is constructed with: A stator is the static part of the DC machine that houses the field windings and receives the supply. A rotor is the rotating part of the … Read more
Electric Power Transmission Electric power transmission systems are the means of transmitting power from a generating source to various load centers (i.e. where the power is being used). Generating stations generate electrical power. These generating stations are not necessarily situated where the majority of the power is being consumed (i.e. the load center). Distance isn’t … Read more
Power system engineering is a key area of electrical engineering. It focuses on generating and transmitting electrical power efficiently, with minimal losses, from the source to the end user. Power levels often change due to load variations or disturbances. Power system stability is crucial in electrical engineering. It refers to a system’s ability to return … Read more
Corona Discharge, also referred to as the Corona Effect, is an electrical discharge phenomenon that occurs when a conductor carrying high voltage ionizes the surrounding fluid, often air. The corona effect will occur in high-voltage systems unless sufficient care is taken to limit the strength of the surrounding electric field. Since corona discharge results in … Read more
Definition of Ideal Transformer An ideal transformer is defined as a theoretical transformer with no losses—no core losses, copper losses, or any other type of losses. This means it has 100% efficiency. Ideal Transformer Model The ideal transformer model is developed by considering the windings of the transformer are purely inductive and the core of … Read more