Symmetrical Stator Motor Phase Control
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Solution Overview
Problem
Traditional single-phase motors with unsymmetrical stator modules are complex to design and manufacture, increasing costs and time consumption, necessitating the development of a motor using a symmetrical stator module and corresponding control system.
Innovation Solution
A motor design featuring a symmetrical stator module configuration with a mechanical phase converting line between two stator modules, a rotor with two modules, and phase detectors on either side of the line, generating a resultant moment for phase conversion and using a control module to provide soft-switching or advanced phase driving signals for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an unsymmetrical stator module is used to overcome reverse rotation of the motor, then the reverse rotation problem is solved, but the design complexity and manufacturing cost increase
Solution Approach 1:
The patent applies asymmetry in the control strategy rather than physical structure. By using a symmetrical stator module with symmetrical winding arrangements, the physical structure remains simple and manufacturable. The asymmetry is introduced through the control system that applies different switching sequences and phase detection logic to achieve unidirectional rotation control, thus solving the reverse rotation problem without increasing manufacturing complexity
2Reliability
If an unsymmetrical stator module is used to overcome reverse rotation of the motor, then the reverse rotation problem is solved, but the manufacturing time consumption increases
Solution Approach 1:
The patent eliminates the need for complex unsymmetrical stator module manufacturing by using symmetrical modules with asymmetrical control. The symmetrical stator modules can be mass-produced using standard manufacturing processes, significantly reducing manufacturing time. The control system then manages rotation direction through electronic switching and phase detection, avoiding time-consuming custom manufacturing
3Device complexity
If a symmetrical stator module is used, then the design and manufacturing complexity is reduced, but the reverse rotation control becomes more challenging
Solution Approach 1:
The patent employs phase detection feedback mechanisms to monitor rotor position and provide feedback to the control system. This feedback enables the controller to determine the appropriate switching sequence to achieve desired rotation direction. By continuously monitoring phase information and adjusting switching commands accordingly, the system easily controls rotation direction despite using simple symmetrical stator modules
Solution Approach 2:
The patent uses dynamic switching control where the switching sequences are adjusted in real-time based on rotor position and desired rotation direction. The control system dynamically changes the phase excitation patterns to achieve forward or reverse rotation, making the operation of symmetrical modules as controllable as traditional unsymmetrical designs
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
The motor effectively addresses the complexity of reverse rotation issues with symmetrical stator modules, reducing manufacturing costs and time while ensuring efficient operation by utilizing phase detectors to generate appropriate driving signals for normal rotation.
Implementation Method 1
The first stator module has a first coil, the second stator module has a second coil, and a resultant moment is generated by the first coil and the second coil to drive the motor
Implementation Method 2
The first phase detector is configured on the stator. The first phase detector is configured at one side of the mechanical phase converting line, and the first phase detector and the first stator module are configured at the same side of the mechanical phase converting line. When the rotor stops rotating, the magnetic phase converting point remains within a range defined by an angle range having the mechanical phase converting line as a center line
Data Source
AI summary
Disclosed is a motor. The motor is electrically connected to a control module. The motor includes a stator and a rotor. The stator includes a first stator module and a second stator module. The first stator module is configured beside the second stator module. A mechanical phase converting line is defined as a center position between the first stator module and the second stator module. The rotor is configured around the stator. The first phase detector is configured at one side of the mechanical phase converting line, and the first phase detector and the first stator module are configured at the same side of the mechanical phase converting line.