Heat pump solutions by onsemi
Heat pump is a proven way to provide secure and sustainable heating which is powered by low‐emissions electricity, is the central technology in the global transition to secure and sustainable heating. However, the primary objective of heat pumps is to provide heating, although reverse cycle heat pumps can also provide both heating and cooling. Due to their ability to recover waste heat and elevate its temperature to more practical levels, they possess significant potential for energy conservation.
Design trends for HVAC
- High Power Density with minimum power dissipation, high efficiency and low EMI
- Scalable design for different hear pump power scaling
- Robust design and integration for long life - protection from environmental influences
- Downsizing -> smaller inverter package defines the entire design
Figure 1: How heat pumps works
Heat pumps (Figure 1) can deliver heating, cooling, and dehumidification needs and are a proven and sustainable solution for heating powered by electricity. They are an environmentally friendly option for your home and office, helping us move away from fossil fuels to more renewable energy technologies. With global concerns about energy security and climate commitments, heat pumps are emerging as the primary tool for decarbonization in space and water heating systems.
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Three-phase block diagram
Single-phase block diagram
Key features
Intelligent Power Module
- IPM contains inverter power stage, gate driver, NTC (optional), bootstrap diode and power switches
- Bring the power level up to 1-20kW for single and three-phase input AC drives
- Direct Bonded Copper:
- Outstanding thermal conductivity: 24(AL2O3) to 170 (ALN) W/mK
- Perfect isolation and no degradation: >20kV/mm
- Huge Resistivity > 10Ωcm @20°C
- Broad temperature range: -55°C to 850°C
- Common packages for P2P replacement
- SiC inside for a huge efficiency improvement
PFC Controllers
- State-of-the-art single-phase, totem pole or Interleaved PFC controllers to increase efficiency
- FAN9673 Interleaved PFC
- NCP1681 Interleaved PFC
- Integrated PFC
- Benefits:
- Efficiency improvement and power factor optimization
- Reducing of voltage drops and current losses
- Improvement by reducing harmonics and voltage fluctuations
- Ensures compliance with standards, thus avoiding penalties
Power Discretes
- M3S EliteSiC MOSFET Features
- Optimized for High temperature operation
- Diodes : Low series-resistance temperature dependency
- MOSFETs : Stable reverse recovery over temperature
- Improved parasitic capacitances for high frequency and high efficiency application
- Large die with low RDS(on) available
Gate Drivers
Gate drivers are the interface between control signals and power switches. onsemi offers broad portfolio of isolated and non-isolated drivers for a variety of power switches with advanced features to boost your system applications.
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FS7 IGBT
- The 1200V Trench FS7 IGBTs are newly used and recommended for the PFC stage of a three-phase heat pump system.
- R-series with low Vce(sat)=1.37V at rated current @25°C.
- Available packages: TO-247-3L, TO-247-4L, QD3, Bare die.
- Power Integrated Modul with FS7 available