STMicro display solar cells using micro-switches and micro-inverter, the use of SiC diodes

high voltage DC power supply can also be used to optimize the function
called “MPPT (maximum power point tracking)”, a lot of power conditioners are installed in the feature. However, methods for generating light of different characteristics and multiple pieces of solar cell panels, MPPT function there is a problem that the system will be unable to maximize the overall power output.
joint venture STMicroelectronics STMicroelectronics (STMicroelectronics) in photovoltaic technology and services exhibition “PV Japan 2011″ (2011 December 5 – 7, Makuhari Messe Convention Center), the display photovoltaic power generation system for micro-micro-inverter converter and the reference model. Expected to be launched in the spring of 2012, the reference model based on the actual product.

relative to the DC output of the micro-converter, the output power micro-inverters for the exchange, almost with the original power regulator of all functions.
The STMicroelectronics micro-display converter “high-voltage power-optimized platform” is characterized by the output voltage up to 350 ~ 430V. Equipped with a power regulator have (1) MPPT, (2) boost, (3) DC to AC conversion of the three main functions (1) and (2).
reduce the loss of the use of SiC diodes
micro-switches and micro-inverter is based on optimization of solar panel output voltage and current values, so that the maximum power output of solar cell devices.
micro-inverter products now have a variety, but “the chip manufacturers to develop the reference model is the first time” (ST). And the company installed in the reference model used in the semiconductor silicon carbide Schottky diode (SiC SBD) product “STPSC806G”.
As the output power of DC current (DC), so a number of pieces of solar cell panels, in the high-voltage DC solar panels on the bus converter and the micro-group. Between micro-converter with sharing information through wire communication function.
reference model of the power conversion efficiency of 97% or more. Loss was mainly DC-DC boost converter circuits and switching losses, etc., the micro-power converter itself less than 1W.

The reference model of power conversion efficiency of 95% or more. Installed 32bit MCU products are also available so that the output phase AC power system with phase-coherent system linkage function. (Reporter: wild Zezhe students, “Nikkei Electronics”)