Vector control ac inverter
1.Vector control ac inverter.
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2. Basic Parameters of Vector control ac inverter.
3.Main features and application of the Vector control ac inverter.
4.Main parameters of Vector control ac inverter.
5.Details of Vector control ac inverter.
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Q1. What is the difference between a variable frequency drive and an inverter?
A1. A variable frequency drive (VFD) runs a motor in such a way that you can increase or decrease the velocity of rotation by varying the frequency of the input signal i.e incoming AC voltage. In effect it converts a standard AC frequency that is typically 50 hz or 60 Hz to anything between 0 Hz and either 50 or 60 Hz.
With a variable frequency drive you can have different configurations to control a motor. You can control the speed (rpm) of a motor by changing the frequency and you can do this in different ways. You can use preset speeds, you can change preset speeds to increase speed depending on your application, you can also control speed in a variable way.
It's more than frequency conversion... you have a first stage that rectifies incoming AC, and charges a DC capacitor bank called the "DC Bus". Then, the energy from the DC Bus is modulated as a PWM output (usually 4KHZ carrier) using a microprocessor... this is what controls how much energy is sent to the motor, and allows you to control its speed and torque from the variable frequency drive. An inverter is an electrical equipment that converts DC power into AC power.
A variable frequency drive is an equipment to drive induction motors where speed of the motor is controlled by regulating the frequency of the supply. To obtain constant torque however, voltage is also varied in order to keep v/f ratio constant. A variable speed drive is essentially consists of a rectifier and an inverter.
Therefore an inverter is a sub-part of a variable frequency drive in this context.
11. Vector control ac inverter Wirings diagram