Performance of Linear Motors at Extreme Temperatures

Performance in extreme high temperature environments (≥ 60 ℃)
Electromagnetic performance attenuation: The insulation material of the coil has insufficient high temperature resistance and is prone to aging and failure, resulting in a decrease in motor thrust (about 3% -5% for every 10 ℃ increase in thrust), and even a risk of coil burnout.
Thermal deformation effect: The difference in thermal expansion coefficients between the stator and rotor materials can cause uneven air gaps, increase operating noise, and reduce positioning accuracy (accuracy may decrease by more than 20% at high temperatures of 100 ℃).
Accelerated component wear: Permanent magnets are prone to demagnetization at high temperatures (neodymium iron boron permanent magnets may permanently lose magnetism above 150 ℃), lubrication failure of rolling guides, encoders and other accessories, and increased wear.
Performance in extreme low temperature environments (≤ -20 ℃)
Increased resistance to movement: The viscosity of lubricating oil increases or even solidifies, causing difficulty in starting the motor, increased friction during operation, and slower response speed.
Material performance changes: The brittleness of metal parts increases, plastic parts are prone to cracking, and connection parts may become loose due to thermal shrinkage, affecting structural stability.
Electrical system abnormalities: cables and connectors have decreased elasticity and are prone to breakage, electronic components such as encoders have decreased sensitivity, signal transmission is delayed or distorted, and positioning errors have increased.
Key influencing factors
Motor type: Non iron core linear motor has better heat dissipation than iron core, but weaker low-temperature resistance; Permanent magnet synchronous linear motors are more susceptible to high-temperature demagnetization than induction linear motors.
Protection level: IP65 and above. High protection motors can reduce direct corrosion of internal components by temperature and enhance adaptability to extreme environments.
Material selection: Motors made of high-temperature resistant insulation materials (such as polyimide) and low-temperature resistant lubricating oils (such as synthetic esters) have stronger extreme temperature tolerance.