Karim Ul Hasan

Stall current is the maximum current an AC motor uses when it starts or stops. If the motor stays at this current for too long, it can become damaged. The time until damage occurs depends on the motor’s characteristics, casing design, cooling methods, and the ambient temperature. Measuring stall current typically involves a tool called … Read more

A squeaky car AC blower motor usually comes from debris in the motor or a worn bearing. These issues can block airflow, creating noise. A video demonstration can show the differences between an old blower motor and a new one. Regular car maintenance can prevent these problems and keep your AC system working well. To … Read more

A squeaky car AC blower motor can be caused by debris blocking the motor or worn bearings inside it. You can tell an old motor from a new one by the noise it makes. Replacing the motor can stop the noise. Regular maintenance helps keep your AC system working well. Consider watching a video explanation … Read more

A split ring is an electrical component used to reverse current direction in motors. It mainly functions in DC motors to maintain smooth rotational motion. In AC motors, slip rings transfer power. Split rings help generate consistent torque by controlling the electromagnetic fields during rotation. The benefits of a split ring AC motor include high … Read more

A split phase AC motor, also known as a resistance start motor, features a single cage rotor. It has a stator with two windings: the main winding and the starting winding, positioned 90 degrees apart. This design allows the motor to start efficiently and run smoothly, making it ideal for many applications. Essential structure components … Read more

To spin an AC motor in reverse, switch two of the starter wires. This change alters the magnetic fields. As a result, the motor receives both positive and negative currents in a different sequence. This causes the rotor to rotate in the opposite direction, enabling controlled reverse operation. Safety is paramount when attempting to reverse … Read more

A SPICE model of an AC motor simulates its performance with a mathematical framework. Key parameters include phase voltage, phase current, torque, back-EMF, and angular speed. You can model a three-phase induction motor using software such as LTspice or TINA to effectively analyze its behavior and characteristics. The SPICE model simplifies complex computations by breaking … Read more

The speed of an AC motor is calculated using the formula RPM = 120 * F / P. In this formula, RPM is the motor speed, F is the supply frequency in Hertz (Hz), and P is the number of poles. Most AC motors use a squirrel cage rotor, which enhances efficiency and reliability. This … Read more

The speed of an AC motor depends on the number of poles and the line frequency of the power supply. Voltage does not affect the speed. Common configurations include two-pole and four-pole motors. The motor’s speed is calculated by the alternating current frequency and the number of poles. As we explore further, it’s important to … Read more

Sensorless speed estimation in AC motors improves control accuracy. This method calculates mechanical slip speed using real-time measurements of stator voltage and current. The Extended Kalman filter helps ensure precise rotor-speed estimation. This approach is effective for three-phase induction motors in industrial settings. Advanced techniques, such as observers and Kalman filters, have emerged as effective … Read more