What Core Properties Do Magnets for Inverter Compressors Require?

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Neodymium magnets serve as vital magnetic parts inside inverter compressors for air conditioners, refrigerators and other HVAC equipment. Inverter compressors run continuously with variable speeds, so the magnets must withstand sustained high working temperatures and resist irreversible demagnetization.

The commonly used grades are N42H, N45H and N45SH. N42H and N45H can operate steadily up to 120°C, suitable for most household air conditioner compressors. N45SH supports temperatures up to 150°C, ideal for heavy-duty commercial compressors. These magnets deliver stable magnetic flux and consistent torque during frequent speed adjustments.

NiCuNi coating is standard for these magnets. We produce arc-shaped ndfeb magnet matching rotor design. Custom dimensions, magnetization directions and tolerances are available to meet different compressor motor specifications.