Magnet track

In linear motor systems, the magnet track is the stationary component consisting of precisely arranged permanent magnets (typically neodymium iron boron) that create an alternating magnetic field along the travel path. It interacts with the electromagnetic coils in the moving forcer to generate linear motion through Lorentz force principles. The track typically includes a steel backing plate for structural support and a protective coating to resist corrosion and mechanical damage. Key parameters include magnetic pole pitch (20–60 mm), magnet width (30–120 mm), magnet height (10–30 mm), magnet grade (N35–N52 per GB/T 13560), maximum operating temperature (80–150 °C), surface magnetic flux density (0.8–1.2 T), straightness tolerance (±0.05–±0.1 mm/m per ISO 1101), mounting hole spacing (50–200 mm), weight per meter (5–20 kg/m), and corrosion protection rating (IP54–IP65 per IEC 60529). These values are reference ranges; actual specifications must be confirmed with the manufacturer for the specific model and application. The magnet track is a component used in linear motors for applications requiring precise, high-speed linear motion, such as automation, material handling, and machine tools. When selecting a magnet track, verify that the pole pitch and width match the forcer, the straightness tolerance meets the application's precision requirements, and the corrosion protection is suitable for the environment. Also confirm the maximum operating temperature and magnetic flux density to ensure performance and avoid demagnetization. The track's mounting hole spacing must align with the base plate or machine bed. Regular inspection for physical damage, corrosion, or demagnetization is recommended. If the motor exhibits reduced thrust or increased vibration, check the track surface for contamination or damage. Irreversible demagnetization can occur if the temperature exceeds the rated maximum. Always consult the manufacturer for detailed specifications and installation guidelines.

The magnet track establishes a fixed magnetic field pattern (typically alternating north-south poles) along the linear path. When current flows through the electromagnetic coils of the moving forcer positioned above the track, the interaction between the coil's magnetic field and the permanent magnet field generates force, propelling the forcer along the track. The magnitude and direction of the force depend on the current and the magnetic field strength. The alternating pole arrangement ensures continuous force generation as the forcer moves.