Single Winding Motor with Filtered Position Detection
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Solution Overview
Problem
Electric motor systems used in ventilation for electronic components in limited spaces require additional windings and terminals, leading to space constraints and increased manufacturing costs.
Innovation Solution
A motor system utilizing a single winding for both driving and position detection, controlled by a unit with filters and a comparator to manage current flow, eliminating the need for additional windings and terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional windings and terminals are added for position detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the driving winding and position detection winding into a single integrated winding structure. The stator winding serves dual purposes: generating the magnetic field for motor operation and providing position detection information through its inductive characteristics. This merging eliminates the need for separate detection windings and reduces terminal requirements while maintaining measurement precision.
Solution Approach 2:
The single stator winding performs multiple functions simultaneously: it acts as both the driving winding for motor operation and the detection winding for rotor position sensing. The control unit analyzes the inductive reactance variations of this multi-functional winding to determine rotor position, eliminating the need for dedicated detection windings and reducing overall device complexity.
2Measurement precision
If additional windings are added for position detection, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the driving and detection windings into a single stator winding structure, reducing the number of winding sets required. This consolidation decreases manufacturing steps, reduces material usage, and simplifies assembly processes, thereby lowering manufacturing costs while maintaining position detection precision through intelligent control algorithms.
Solution Approach 2:
The single stator winding serves dual purposes as both driving and detection winding, eliminating the need for separate detection winding manufacturing. This multi-functionality reduces production complexity, minimizes raw material requirements, and simplifies quality control processes, leading to reduced manufacturing costs.
3Measurement precision
If additional windings and terminals are added, then measurement precision is improved, but space requirements increase
Solution Approach 1:
The patent combines the driving and detection windings into a single stator winding structure, eliminating the need for separate detection winding space. This merging reduces the overall motor dimensions and terminal count, making the motor system more compact and suitable for space-constrained applications while maintaining position detection precision through control unit analysis.
Solution Approach 2:
The single stator winding performs both driving and detection functions, eliminating the need for additional detection windings and associated terminals. This multi-functionality reduces the motor's physical footprint and terminal space requirements, enabling compact motor designs for applications with limited installation space.
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 approach allows for a compact, cost-effective motor system that efficiently manages current flow and rotor position, reducing space requirements and manufacturing complexity.
Implementation Method 1
a stator having a winding through which current is flowing for driving the rotor
Implementation Method 2
The control unit employs a first filter and a second filter, each filter is connected to the winding and has outputs coupled to a comparator
Data Source
AI summary
An electric motor system having a rotor with a plurality of permanent magnets, and a stator having a winding through which current is flowing for driving the rotor. A control unit controls the current flowing through the winding. The control unit employs a first filter and a second filter, each filter is connected to the winding and has outputs coupled to a comparator. The comparator compares the signal output of the first filter to the signal output of the second filter. The control unit controls the current flowing through the winding depending on the result of the comparison of the two filtered signals.