Novel permanent magnet linear motor with isolated movers: analytical, numerical and experimental study

Area of Science:

• Electrical Engineering
• Electromagnetics
• Mechanical Engineering

Background:

• Conventional multiple motor systems face challenges in compactness and efficiency.
• There is a need for advanced linear motor designs with improved power density.

Purpose of the Study:

• To propose and analyze a novel permanent magnet linear motor with two independent movers.
• To enhance system compactness, power density, and working efficiency.
• To validate the analytical model through numerical and experimental methods.

Main Methods:

• Equivalent magnetic circuit method for magnetic field distribution.
• Formulation of force output considering armature reaction.
• Finite element method for inductance analysis and mover interaction.
• Development of a research prototype and thrust force measurement apparatus.

Main Results:

• The proposed motor design increases system compactness and improves power density and efficiency.
• Mutual-inductances between movers are negligible, ensuring independent operation.
• Analytical model for thrust force is validated by numerical computation and experimental measurements.

Conclusions:

• The novel two-mover permanent magnet linear motor offers significant advantages in compactness and efficiency.
• The analytical model accurately predicts the motor's thrust force performance.
• This design represents a promising advancement for high-performance linear motion applications.