That includes excessive effectivity, minimal THD, and user-friendly software program, the reference design seamlessly addresses unpredictable load challenges. 

Voltage supply inverters (VSIs) are steadily employed in uninterruptible energy provides (UPS) to supply a constant AC voltage on the output. Nonetheless, designing management for these inverters might be intricate because of the unpredictable masses that could be linked to the inverter’s output. Addressing these challenges and wishes, a reference design of a single-phase inverter has been launched by Texas Devices (TI). The reference design utilises a C2000 microcontroller (MCU) to manage a single-phase inverter (DC/AC). It presents twin operational modes for the inverter. One is the voltage supply mode with an output Inductor-Capacitor (LC) filter, and the opposite is a grid-connected mode that includes an Inductor-Capacitor-Inductor (LCL) output filter. With its excessive effectivity, minimal Complete Harmonic Distortion (THD), and user-friendly software program, this mannequin is especially interesting for professionals designing inverters for UPS and renewable power endeavours, together with PV inverters, grid storage, and microgrids.

The reference design has an enter voltage of 380-DC VIN, with an output of 110V Root Imply Sq. (RMS) at 60 Hz or 22V RMS. Customers can choose between 60 Hz or 50 Hz for output, and it presents a most output of 600-VA. The system achieves a peak effectivity of 98% and employs a 20-kHz switching mechanism. Relating to harmonic efficiency, its THD is lower than 1% for linear masses and fewer than 3% for typical non-linear masses when utilizing Sigma-Delta Frequency Modulation (SDFM). With Analog to Digital Converter (ADC), these values are lower than 2% for linear masses and fewer than 4% for typical non-linear masses. The operation of the controller might be chosen primarily based on both chilly or scorching eventualities, which means it may possibly work on remoted or non-isolated sides. 

An ordinary inverter is made up of a full bridge constructed with 4 switches. These switches might be managed utilizing pulse width modulation (PWM). Accompanying this bridge is a filter designed for its high-frequency switching. An inductor-capacitor (LC) output filter is employed for this reference design. To keep up a constant output voltage from the inverter, present and voltages have to be detected. The MCU’s on-chip ADCs present a fast and correct means to sense these alerts. The software program related to this reference design is organised into three sequential builds: an open loop, a closed present loop, and a closed voltage loop with an inside present loop. These are additional supplemented by varied testing choices for evaluating the management loop design. This step-by-step method streamlines each system initiation and the general design course of.

TI has examined this reference design. It comes with a Invoice of Supplies (BOM), schematics, Gerber file, and many others. Yow will discover extra knowledge concerning the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.