Compare Inverter AC and Non - Inverter AC

The Comparison between Inverter AC and Non - Inverter AC is given as below.

Power

• The inverter 1 Ton AC will run continuously but draws as much power that is required to keep the room at desired cooling level. 

Pulse Width Modulation ( PWM )

Voltage Control in the Inverter

When an inverter is connected to load, the output voltage of inverter is controlled due to following reasons. 

• To adjust output voltage of inverter

Parallel Inverter OR Parallel Inverter With Feedback Diodes

• The power circuit diagram of the single phase parallel inverter is shown in the figure A.  
• The commutating capacitor C is connected across supply source therefore it is called as PARALLEL INVERTER. 

Series Inverter ( Load Commutated Inverter or Self Commutated Inverter )

• The commutating components L and C are connected in series with the load therefore this inverter is called as SERIES INVERTER. 
• The value of commutating components is selected such that the circuit becomes under damped. 

Single Phase Full Bridge Inverter

• The power circuit diagram for the single phase full bridge inverter is shown in the figure A. 
• The SCR triggering circuit and commutation circuit is not shown for simplicity. 

Single Phase Half wave Inverter

• The power circuit diagram for the single phase half bridge inverter is shown in the figure A. 
• The SCR triggering circuit and commutation circuit is not shown for simplicity.

Classification of Inverter

The classification of Inverter is done as follows

According to Semiconductor devices

• SCR
• BJT

Switching Semiconductor Devices for Inverter

The semiconductor devices which are used for inverter circuit is given below. The SCR is used for high power rating inverter.

Bipolar Junction Transistor ( BJT )

Compare Current Source Inverter ( CSI ) and Voltage Source Inverter ( VSI )

Voltage Source Inverter ( VSI ) – Current Source Inverter ( CSI )

• The output voltage remains constant for a given type of load in the VSI whereas the input current remains constant in the CSI. 
• A large capacitor is connected at the input side of the VSI whereas a large inductor is connected at the input side of the CSI. 

Current Source Inverter ( CSI )

• The voltage source inverter is one in which output voltage remains constant and it does not depends upon type of load. 
• The voltage across load is kept constant by connecting large capacitor at the input side of the inverter. 

Voltage Source Inverter ( VSI )

• The basic circuit for voltage driven inverter is shown in the figure A. The DC supply is given to the primary winding of the transformer.
• There are two semiconductor switches S1 and S2 in which switching is done by astable multivibrator at selected frequency. 

Principle of Inverter

Inverter

• It is a apparatus or device which converts constant DC voltage into variable voltage, variable frequency AC supply.