What is a Brushed DC motor? Brushed DC motors represent one of the oldest, most cost-effective, and straightforward categories among DC motors. They utilize brushes for transferring current to the motor windings via mechanical commutation. The motor’s characteristics are influenced by the number of coils wound around it and the
Classification of DC motors DC motors vary based on the arrangement of connections between the field winding and the armature, with options for parallel, series, or both. Another key distinction lies in how the rotor receives power, either through brushes, where current is supplied via brushes, or brushless motors, where
How is torque generated in a DC motor? When a DC machine operates under load, whether functioning as a motor or a generator, the rotor’s conductors carry current within the magnetic field of the air gap. Consequently, each of these conductors undergoes a force (F=iL X B) as they are
What is L293 motor driver IC? A motor driver, commonly an integrated circuit chip, plays a crucial role in managing motors within autonomous robots and control setups. It serves as a crucial intermediary between the microcontroller (such as Arduino) and the motors it directs. Given that motors often demand higher
What is a Brushless DC motor? Brushless DC motors (BLDC motors), as their name suggests, operate without brushes. Unlike brushed motors where brushes transmit current to rotor coils through a commutator, brushless motors have fixed coils on the stator, while the rotor consists of permanent magnets. In brushless motors, the
Circuit symbol, Working principle of insulated gate bipolar transistor, structure of IGBTs, advantages of IGBTs, modes of operation of IGBTs
What is a DC motor? A DC motor is an electrical machine that converts electrical energy into mechanical energy. Inside a DC motor, the input electrical energy, which is in the form of direct current (DC), gets transformed into mechanical rotation in the presence of a stationary magnetic field. Working
What is electronic speed controller (ESC)? The ESC, which stands for “electronic speed control”, regulates electric motor speed (throttle) and function, and is widely used in radio-controlled (RC) models (drones), particularly with brushless motors. It offers a 3-phase electric power source and can be a separate unit or integrated within
What is Back EMF ? As the armature of a DC motor spins within a magnetic field, electromagnetic induction occurs, inducing an electromotive force (emf) in the armature’s conductors, similar to a generator’s operation. This induced emf opposes the applied voltage (following Lenz’s law) and is referred to as back
What is an H-bridge circuit? An H-bridge circuit forms the fundamental configuration for controlling a DC motor’s direction—either clockwise or counterclockwise. Comprising four switches (made using relays or transistors) arranged in the shape of the letter ‘H,’ this setup allows the motor to move in different directions. Engaging one pair