Inverter 310v high frequency AC 220v AC

In many applications, it is important for an inverter to be lightweight and of a relatively small size. This can be achieved by using a High-Frequency Inverter that involves an isolated DC-DC stage (Voltage Fed Push-Pull/Full Bridge) and the DC-AC section, which provides the AC output.

The power supply topologies suitable for the High-Frequency Inverter includes push-pull, half-bridge and the full-bridge converter as the core operation occurs in both the quadrants, thereby, increasing the power handling capability to twice of that of the converters operating in single quadrant (forward and flyback converter).

The simplest form of an inverter is the bridge-type, where a power bridge is controlled according to the sinusoidal pulse-width modulation (SPWM) principle and the resulting SPWM wave is filtered to produce the alternating output voltage. In many applications, it is important for an inverter to be lightweight and of a relatively small size.

C2000TM and PiccoloTM are trademarks of Texas Instruments. All trademarks are the property of their respective owners. The applied DC voltage is converted to a 50 Hz AC voltage via a full bridge (S1...S4). This is then transmitted via a 50 Hz transformer and subsequently fed into the public grid. Figure 1-2. Transformerless Inverter Technology

Transformerless Inverter Technology The existing DC voltage is converted to a square 50 Hz AC voltage via a full bridge (S1...S4), then smoothed to a sinusoidal 50 Hz AC voltage via the chokes (L1+L2) and fed into the public grid. Additional safety measures (residual current circuit breaker) required.

The AC voltage feedback to the MCU for closed-loop control is given by scaling down the voltage by a resistor divider network and rectifying it by means of a precision rectifier circuit. The precision rectifier circuit is built with the high-speed precision difference amplifier INA143 followed by TL082 powered from a dual supply (±12 V).