Permanent Injection Molded Magnets for Brushless DC Motor – Bonded magnet is one of the most important magnetic materials. It opened a new world of application possibilities. Thermo-elastomer and thermo-plastic resins can be blended together with a variety of magnetic powders to form injection molded, compression and flexible magnets.
Injection molded magnets can be formed into complex shapes and be insert molded directly onto other components to produce assembly parts. Compression bonded magnets offer higher magnetic output than injection-molded magnets, but are limited to more simple geometries.
Injection Molded:
Binder Types / Nylon / PPS / Polyamide.
Temperature Range -40c 180c
Very Tight tolerances off tool ( 0.002 -0.003 Typical )
Very good mechanical strength
Compression Bonded:
Higher Magnetic Strength due to higher magnetic particle density.
Epoxy Binder / Resistant to normal industrial solvents and automotive fluids
Epoxy Coat after manufacturing to prevent oxidation
Temperature Range -40c ~165c
“Tight” tolerances off tool
Good mechanical strength
Typical Bonded Magnet Applications:
Sensors
Brushless DC Motors
Household Appliances
Compressor
Door control motor
General Bonded Magnet Applications:
Materials are isotropic and can be magnetized in any direction
Wide range of existing tool sizes are available in rings, discs and rectangles
Exsisting Multipole magnetizing fixtures for quick prototyping
Easily machined
Existing Multipole rings simplify assembly verse arc sepments
| Magnetic Characteristics and Physical Properties of Bonded Compression Injection Moulding NdFeB, Permanent Bonded Compression Moulding NdFeB Magnet for Air Conditioner | |||||||
| Grade | HSYI-3 | HSYI-4 | HSYI-5 | HSYI-6 | HSYI-7 | HSYI-6SR(PPS) | |
| Br | (mT) | 350-450 | 400-500 | 450-550 | 500-600 | 550-650 | 500-600 |
| Residual Induction | (KGs) | (3.5-4.5) | (4.0-5.0) | (4.5-5.5) | (5.0-6.0) | (5.5-6.5) | (5.0-6.0) |
| Hcb | (KA/m) | 200-280 | 240-320 | 280-360 | 320-400 | 344-424 | 320-400 |
| Coercive Force | (KOe) | (2.5-3.5) | (3.0-4.0) | (3.5-4.5) | (4.0-5.0) | (4.3-5.3) | (4.0-5.0) |
| Hcj | (KA/m) | 480-680 | 560-720 | 640-800 | 640-800 | 640-800 | 880-1120 |
| Intrinsic Coercive Force | (KOe) | (6.5-8.5) | (7.0-9.0) | (8.0-10.0) | (8.0-10.0) | (8.0-10.0) | (11.0-14.0) |
| ( BH ) max | (KJ/m3) | 24-32 | 28-36 | 32-48 | 48-56 | 52-60 | 40-48 |
| Max. Energy Product | (MGOe) | (3.0-4.0) | (3.5-4.5) | (4.5-6.0) | (6.0-7.0) | (6.5-7.5) | (5.0-6.0) |
| μr/Recoil | 1.2 | 1.2 | 2.2 | 1.2 | 1.2 | 1.13 | |
| Permeability | (μ H/M) | ||||||
| (%/ ºC ) | -0.11 | -0.13 | -0.13 | -0.11 | -0.11 | -0.13 | |
| Tempetrature Coefficient | |||||||
| Tc | (ºC) | 320 | 320 | 320 | 320 | 320 | 360 |
| Curie Temperature | |||||||
| ( ºC ) | 120 | 120 | 120 | 120 | 120 | 180 | |
| Max.Work Temperature | |||||||
| (KA/m) | 1600 | 1600 | 1600 | 1600 | 1600 | 2000 | |
| Magnetizing Force | (KOe) | 20 | 20 | 20 | 20 | 20 | 25 |
| ρ | (g/m3) | 4.5-5.0 | 4.5-5.0 | 4.5-5.1 | 4.7-5.2 | 4.7-5.3 | 4.9-5.4 |
| Dendity | |||||||
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