1. Solar Energy Storage Market Overview
With the acceleration of global energy transition, solar energy storage will usher in explosive growth. Solar inverters and energy storage converters (PCS) are core equipment in solar energy storage systems, and their efficiency, reliability, and cost directly affect overall system performance. Magnetic components (inductors, transformers) are indispensable key elements in these power electronic equipment.
2. Solar Inverter Magnetic Components
2.1 Solar Inverter Topologies
String inverters are the market mainstream, power range 20kW-150kW, using two-stage structure:
• Front-end DC-DC (MPPT boost/buck): use boost inductor
• Back-end DC-AC (inverter): use common mode inductor, differential mode inductor
Micro-inverters power range 200W-500W, require high power density:
• High-frequency transformer is key component
• Planar transformer replaces traditional wound transformer
2.2 MPPT Boost Inductor Selection
MPPT boost inductor selection points:
• Power range: 20kW-150kW (string type)
• Operating frequency: 16kHz-50kHz
• Inductance calculation: L = (Vin × D)/(ΔI × fs)
• Core selection: Sendust or ferrite
• Efficiency requirement: ≥98%
3. Energy Storage PCS Magnetic Components
3.1 PCS Topology
Energy storage converters usually use DAB or MMC topology:
• DC-DC stage: bidirectional DC-DC inductor between energy storage battery and DC bus
• DC-AC stage: similar to solar inverter, inverter or rectifier
3.2 Bidirectional DC-DC Inductor Design
Bidirectional DC-DC inductor special requirements:
• Bidirectional power flow: charging and discharging conditions
• Power range: 100kW-500kW (commercial/industrial storage)
• Operating frequency: 8kHz-20kHz
• Efficiency requirement: ≥98.5%
• Cycle life: >6000 cycles (daily charge/discharge cycles)
Ask ProMagTech EngineeringWith the acceleration of global energy transition, solar energy storage will usher in explosive growth. Solar inverters and energy storage converters (PCS) are core equipment in solar energy storage systems, and their efficiency, reliability, and cost directly affect overall system performance. Magnetic components (inductors, transformers) are indispensable key elements in these power electronic equipment.
2. Solar Inverter Magnetic Components
2.1 Solar Inverter Topologies
String inverters are the market mainstream, power range 20kW-150kW, using two-stage structure:
• Front-end DC-DC (MPPT boost/buck): use boost inductor
• Back-end DC-AC (inverter): use common mode inductor, differential mode inductor
Micro-inverters power range 200W-500W, require high power density:
• High-frequency transformer is key component
• Planar transformer replaces traditional wound transformer
2.2 MPPT Boost Inductor Selection
MPPT boost inductor selection points:
• Power range: 20kW-150kW (string type)
• Operating frequency: 16kHz-50kHz
• Inductance calculation: L = (Vin × D)/(ΔI × fs)
• Core selection: Sendust or ferrite
• Efficiency requirement: ≥98%
3. Energy Storage PCS Magnetic Components
3.1 PCS Topology
Energy storage converters usually use DAB or MMC topology:
• DC-DC stage: bidirectional DC-DC inductor between energy storage battery and DC bus
• DC-AC stage: similar to solar inverter, inverter or rectifier
3.2 Bidirectional DC-DC Inductor Design
Bidirectional DC-DC inductor special requirements:
• Bidirectional power flow: charging and discharging conditions
• Power range: 100kW-500kW (commercial/industrial storage)
• Operating frequency: 8kHz-20kHz
• Efficiency requirement: ≥98.5%
• Cycle life: >6000 cycles (daily charge/discharge cycles)