Design and Simulation of Switched Boost Inverter for AC and DC Loads

摘要

Switched Boost Inverter (SBI) is a single stage DC to AC power converter and it is derived from the Z - source inverter employs an LC impedance network in between the main inverter bridge and the power source. This SBI converter can possible to supply both DC and AC loads simultaneously from a single dc input source. Here, reducing the inverter switching stress. Also, this converter provides to shoot- through of the inverter legs without causing any damage to the inverter switches. The unique feature of the SBI, it can operate either in buck or boost mode operations with a wide range of obtainable output voltages from a given input voltage, unlike the traditional buck-type voltage source inverter.SBI construct similar advantages of converter uses more switching devices and lower number of passive devices compared to the original ZSI. Along with its pulse width modulation (PWM) control strategies is give the inverter switching pulse. These features make the SBI suitable for variable motor speed drive application. The SBI reduce the electromagnetic interference noise immunity when compared to the VSI. which enables the compact design of the power converter.Here BLDC motor drive is using as a DC load and AC load as resistive load and non linear load.The theoretical and modulation concepts presented have been verified in simulation .The operating modes of the proposed converter are simulated using MATLAB.