EAEP-Electrical and Electronics Portal

Scheme: A VFD panel view What is variable frequency driver (VFD)? A variable frequency driver (it is also knows as Drives, VFD and inverters) is a type of motor starter that drives an electric motor by changing the frequency and voltage of its power supply. A VFD works according to principle of V / f  policy. The VFD has the ability to control the acceleration and de-acceleration of the motor during start or stop, respectively. These drives are the main reason why the DC motor, which was used extensively in factories in the past, has completely shifted the AC motor from our focus to the essential. VFD has brought the use of AC motors back to important among us. The AC-induction motor can change its speed by changing the frequency and voltage of the power supply used to operate it. This means that if the voltage applied to the motor is 0 Hz, then motor is running at zero speed. When a frequency of 50 Hz is applied to the motor, the motor will run at its rated speed, and if the frequ...

Scheme: Induction motor An induction motor is a machine. Any machine that converts electrical energy into mechanical energy is called a motor. An induction motor works according to the principle of electromagnetic induction. Let us know why it is called induction motor. In a d.c motor electrical energy is conducted directly to the armature (i.e rotating part of the motor) through brushes and Commutator. Hence the d.c motor can be called the conduction motor. Like this in a.c motors, the rotor does not connect to the electrical energy by conduction instead by induction. In this sense, such an electric motors are called induction motors. An induction motor is also called a rotating transformer because this operating principle is consistent with the transformer operating principle. That is, the primary winding is stationary but the secondary winding is rotable.

Hall sensor symbol What is a Hall effect sensor? Hall effect sensor is defined as a device which use the principle to convert magnetically encoded signals into electrical signals. Which means Hall effect sensor output voltage is directly proportional to the magnetic field strength. Hall effect sensors are used in automotive systems for sensing distance, position, speed detection, and current sensing applications.