What Magnetic Properties Are Required for Magnets in HVAC Inverter Compressors?

What Magnetic Properties Are Required for Magnets in HVAC Inverter Compressors?

Every HVAC inverter compressor relies on high-performance neodymium arc magnets to maintain stable motor operation. These magnets are core components of the built-in permanent magnet synchronous motor, directly affecting compressor efficiency and service life.

Working inside compressors means the magnets face continuous high temperature . The most critical performance requirement is high temperature resistance. N42H and N45H are the most widely used grades, with a maximum operating temperature of 120°C. They can resist demagnetization under long-time heat exposure, avoiding motor power drop.

High magnetic flux consistency is another essential property. Uniform magnetic strength keeps the compressor running smoothly, lowers noise and improves energy efficiency, which is vital for energy-saving air conditioning systems. Good corrosion resistance is also required. Nickel coating is commonly applied to protect magnets from oil and moisture inside the compressor chamber.

We supply custom arc segment magnets for HVAC compressors. We can adjust dimension, coating and magnet grade to match your motor design. Free feel to inquire and get technical support.