Inverter

Inverter

Author: Nuttaphong(www.try-plc.com)

What is the inverter

Inverter also called AC drives is an electronic device used to control the speed.Of induction motors or AC motors.

Inverter works.

Basic block diagram of a simple form of the inverter contains the key and runs as follows.

Reetifier circuit:

Contact Derek cycle power suppliers. Rectifier circuit: do conversion or change of voltage alternating current to direct voltage electric current circuits include Power diodes 4 the case of the input is single phase. Power diodes, or 6 if the input is 3 phase.

DC link

DC Link circuit the DC link circuit is a circuit connection between the current and the inverter. (Which will be described in next section), including kappa SIM router with a large rated voltage 400 VDC or 800 VDC depending on the voltage input as a single phase or three phase function filter pressure DC Circuit Order from Optical Power Generation, suppliers and more smoothing capacitors act. While working as a motor generator in the short term because of brake or have Reducing the speed down quickly. (For a case that works with the inertia load a lot and want to stop quickly. Is the pressure drop across the back with kappa and the Foster City. Foster City kappa damage, so in practice a chopper circuit by connecting the resistors in series with transistors and continue parallel to the kappa Foster City. The transistor is switched off to allow the current to flow through the control value. Resistance to reduce the energy that occurred.

Control circuit

Control circuit is to receive information from users such as Get the speed you want to be processed. And send the output to the transistor to control the voltage and. Frequency to rotational speed and torque as The user needs.

Why conversion from DC to AC and DC converter from the AC again

Because the conversion from AC to AC Direct is all. Frequency of the output will live up to high-frequency side input The inability to control motor speed to be faster than the speed mentioned. On the motor nameplate. However, changing from AC to DC and convert it back to AC again to make the inverter frequency can be higher than the frequency of the input

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