6n-Tooth Linear Motor Phase Layout for Low Pulsation Thrust
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing linear motion motors face challenges in reducing pulsation and increasing thrust, particularly in structures with a 6n teeth configuration, where the phase settings of magnets and stator windings are not clearly defined to achieve both goals effectively.
Innovation Solution
A linear motion motor design featuring 6n teeth structures with permanent magnets aligned in a longitudinal direction, paired with 6n windings on stators, and a bonding member to align movers with a π/2 phase difference, supplying currents with phase differences of (1+6) π/3 or (2+6m) π/3 to the stator windings to reduce pulsation and enhance thrust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the number of teeth and magnets is increased to reduce pulsation, then the magnetic circuit balance improves, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by specifically setting the number of teeth to 6n (where n is a natural number) and configuring the phase differences between magnets and currents to precise values (π/2 for magnets, (1+6m)π/3 or (2+6m)π/3 for currents). This mathematical parameterization allows the system to achieve optimal pulsation reduction while maintaining manageable complexity through standardized configurations.
Solution Approach 2:
The patent introduces asymmetry in the phase arrangement of magnets and currents. By deviating the phases of opposite permanent magnets by π/2 and supplying currents with specific phase differences, the system creates an asymmetric magnetic field distribution that balances the magnetic circuit and reduces pulsation effectively.
2Force
If the phase sequence of windings is deviated to suppress thrust reduction, then the thrust is maintained, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter values for current phase differences: (1+6m)π/3 or (2+6m)π/3 where m is an arbitrary integer. These standardized parameter settings allow the system to maintain thrust while providing clear manufacturing guidelines that reduce precision requirements compared to arbitrary phase configurations.
3Object-affected harmful factors
If a 6n teeth structure is adopted to reduce pulsation, then the magnetic circuit balance improves, but the adaptability to different pole configurations is limited
Solution Approach 1:
The patent achieves universality by formulating the solution in terms of 6n teeth structure where n is any natural number, and by using generalized phase difference formulas with arbitrary integer m. This allows the same design principles to be applied across multiple configurations (6 teeth, 12 teeth, 18 teeth, etc.) and different pole numbers, making the solution broadly adaptable while maintaining pulsation reduction effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces pulsation and increases thrust in linear motion motors, as demonstrated in various 6n teeth structures, such as five poles and six teeth, seven poles and six teeth, eleven poles and twelve teeth, and thirteen poles and twelve teeth configurations.
Implementation Method 1
a linear motion motor driven by a three-phase current, includes: a first mover that aligns and holds a plurality of permanent magnets in a longitudinal direction; a first stator having 6n (n is an arbitrary natural number) teeth aligned in the longitudinal direction to face the first mover and 6n windings wound around the respective teeth
Data Source
AI summary
A linear motor achieves both a decrease in pulsation and an increase in propulsion with a 6n teeth structure provided with: a first mover for holding permanent magnets arranged longitudinally; a first stator having 6n teeth that are arranged so as to oppose the first mover and 6n windings that are wound on the respective teeth; a second mover holding permanent magnets longitudinally; a second stator having 6n teeth that are arranged in the longitudinal direction so as to oppose the second mover and 6n windings that are wound on the respective teeth The permanent magnets opposing each other in the first mover and the second mover are disposed with a phase difference of π/2 in the moving direction of the two movers, and electrical currents with a phase difference of (1+6m)π/3 or (2+6m)π/3 are supplied to the windings opposing each other in the first stator and the second stator.