Permanent Magnet DC (PMDC) Motor Arc-shaped Magnets
In order to quote the best price to you in timely, please kindly provide the following information when you send the inquiry:
Material type and grade required
Size and shape, if available, a sketch or drawing with dimensions and tolerances.
Coating of the magnets
Application of the magnets
Max working temperature
Quantity required
Magnetized or not? Magnetization direction?
Material type and grade required
Size and shape, if available, a sketch or drawing with dimensions and tolerances.
Coating of the magnets
Application of the magnets
Max working temperature
Quantity required
Magnetized or not? Magnetization direction?
Arc magnets are a unique shape which are designed especially for motors, generators and alternators and are commonly used for both rotors and stators. They are also used in magnetic flywheel assemblies. In motor design a ring of magnets with alternating polarities on the inner radius rotate in close proximity to a number of copper coils. As the copper passes through the magnetic fields an electric current is induced within the copper.
Four or more magnets with an equal number of north and south polarity on the inner radius can be used to create a multi-pole ring. All arc magnets are available with either pole on the inner radius.
Coating of Neodymium Permanent Magnets
| Coating | THickness | Color | PTC | SST | Characteristic |
| Zn | 4-8μm | Bright Blue | >24H~48H | Regular Protection,
Applicable to most products
| |
| Colored Zn | 4-8μm | Shining Color | >48H~72H | Excellent salt spray resistance | |
| NiCuNi | 10-20μm | Bright Silver | >48H~72H | >24H~48H | Excellent humidity,
heat&salt spray resistance
|
| Electroless Nickel | 10-30m | Bright Silver | >72H | >96H | Excellent humidity,
heat&salt spray resistance
|
| Black Nickel | 10-20μm | Bright Black | >72H | >48H~96H | Excellent humidity,
heat&salt spray resistance
|
| Sn | 10-25μm | Silver | >48H | >36H~72H | Excellent humidity,
heat&salt spray resistance
|
| Epoxy | 10-30μm | Black or Grey | >72H~108H | Excellent humidity,heat&salt spray
resistance,excellent adhesion
| |
| Phosphated
/Passivation
| ≤1μm | Dark Grey | <2.5H
Emerge in 3%Nacl Liquor
| Temporary Protection | |
| Everlube | 8-20μm | Yellow | >72H | >96H | Excellent salt spray resistance,
Excellent adhesion
|
| Golden | 10-15μm | Golden | >48H | >12H | Good looking |
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