'Micro Reverse Star' - PQ34 High Frequency Transformer Series

The image is sourced from the interior of Shunluo

Under the goal of "carbon peak carbon neutrality", China's energy revolution is accelerating. To implement the dual carbon goal, the power system should take the lead. In the energy structure dominated by new energy, both photovoltaic and wind power, as clean energy sources, will play a major role. In recent years, centralized photovoltaic technology has developed rapidly in China, and distributed photovoltaic technology is no exception. Among them, distributed photovoltaics include industrial and commercial photovoltaics and household photovoltaics. Nowadays, household photovoltaic has become the focus of segmented fields in the photovoltaic industry.And the essential component of household photovoltaic is the micro inverterIn the circuit topology architecture of micro inversion,The mainstream solutions are interleaved parallel flyback and full bridge phase shifted forwardThe main magnetic devices involved are transformers (PQ34), current transformers (EE5.0 or ER8.5 SMD type), differential mode inductors (filtering), and common mode inductors. In addition, the auxiliary power supply includes auxiliary source transformers (EP13, etc.).

Driven by industry trends, Sunlord has developed a main transformer suitable for household photovoltaic micro inverters——The PQ34 high-frequency transformer series has reached a mature and stable level, which can achieve an overall conversion efficiency of over 96.5% in the circuit, and has advantages such as huge production capacity and stable quality.

• Mature and stable products, leading core supplier in the micro reverse industry

• Independently developed broadband, wide temperature, and low loss magnetic materials, with an overall circuit conversion efficiency of over 96.5%

• Stable and reliable quality, supporting customization

• Widely used in fields such as photovoltaic and energy storage
  

  
  

• Working temperature: -40 ℃~+125 ℃

• Package size: L38mm × W37mm × H15.5mmax (height H can be adjusted to 22.0 Max)

• Dielectric strength: PRI-SEC: AC3.75KV 5mA; SEC CORE: AC3.75KV 5mA

• Safety distance: PRI SEC: ≥ 6.5mm, PRI CORE: ≥ 4.0mm

  
  

The image is sourced from the interior of Shunluo

The PQ34 series magnetic cores of Sunlord high-frequency transformers have multiple different sizes and losses, which can meet different customer requirements. The following are examples of magnetic cores and their corresponding losses:

The image is sourced from the interior of Shunluo

Image from inside Shunluo

The PQ34 series high-frequency transformers are mainly used for micro inverters. The following figure shows the application architecture of household photovoltaic micro inverters, while the PQ34 transformers are mainly used for MPPT& DC-DC boost section.

Image from inside Shunluo

The following is a micro inverse topology circuit, and the application location of the PQ transformer has been marked:

Image from inside Shunluo

Finally, in addition to the high-frequency transformer PQ34, Sunlord also has other sizes for micro inversion, such asPQ36, PQ38, PQ40, PQ47Wait, it can meet customers' higher power customization needs(300W-500W/piece)Welcome everyone to consult.