Electric Machine Rotor With Conductive Coils For Torque Enhancement
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Solution Overview
Problem
Existing electric machines, such as those used in submersible pumps, experience limited torque, which restricts fluid lifting power and efficiency in fluid extraction applications.
Innovation Solution
The electric machine incorporates a rotor with a rotor core, permanent magnets, and electrically conductive coils that are electrically excited by a power source, enhancing torque through additional electromagnetic fields and increased flux density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional rotor design with permanent magnets is used, then the structure is simple, but the torque is limited
Solution Approach 1:
The patent merges permanent magnets with electrically conductive coils within the rotor assembly. The coils are positioned to surround or be adjacent to the permanent magnets, combining two different magnetic field generation mechanisms (permanent magnet field and electromagnetic induction field) into a unified rotor structure that produces enhanced torque.
Solution Approach 2:
The rotor employs a composite approach by integrating permanent magnets (providing steady magnetic field) with electrically conductive coils (generating dynamic electromagnetic field when excited). This composite magnetic field system creates synergistic effects that produce higher torque than either component alone.
2Force
If electrically conductive coils are added to the rotor, then torque is enhanced, but the device complexity increases
Solution Approach 1:
The electrically conductive coils serve multiple functions: they generate electromagnetic fields to enhance torque, can be selectively excited to modulate torque output, and work in conjunction with the permanent magnets to create a versatile rotor system that adapts to different operational requirements.
Solution Approach 2:
The system transitions from a static permanent magnet rotor to a dynamic rotor where torque can be modulated by controlling the electrical excitation of the coils. This dynamic capability allows torque adjustment based on load conditions, improving overall system performance.
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 increases the torque exerted on the rotor, leading to improved fluid lifting power and efficiency in fluid extraction, reducing the cost per unit measurement of extracted fluid.
Implementation Method 1
one or more electrically conductive coils disposed at least partially within the rotor core to modulate torque exerted on the rotor
Implementation Method 2
a plurality of permanent magnets disposed in contact with the rotor core
Data Source
AI summary
An electric machine is presented. The electric machine includes a stator. The electric machine further includes rotor disposed adjacent to the stator. The rotor includes a rotor core, a plurality of permanent magnets disposed in contact with the rotor core, a plurality of permanent magnets disposed in contact with the rotor core to modulate torque exerted on the rotor.