Current-Shaping Circuit for Magnetic Coupler Torque Optimization
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Solution Overview
Problem
Dimensionally constrained magnetic couplers in wellbore applications are insufficient in peak torque capability due to size limitations, hindering the generation of sufficient power for downhole devices.
Innovation Solution
A current-shaping circuit is used in conjunction with magnetic couplers and alternators to eliminate high frequency torque components, allowing for the shaping of current into a sinusoidal waveform, which reduces the torque required and enhances the peak torque capability of the magnetic coupler, enabling smaller couplers to provide adequate power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the magnetic coupler is reduced to fit space constraints in the wellbore, then the device can be deployed in smaller wellbores, but the peak torque capability becomes insufficient to generate adequate power
Solution Approach 1:
The patent applies parameter changes by modifying the electrical current characteristics through the current-shaping circuit. By transforming the current waveform and eliminating high-frequency components, the system changes the operational parameters of the alternator-magnetic coupler system, allowing a smaller coupler to deliver sufficient power through optimized electrical rather than purely mechanical means
Solution Approach 2:
The patent replaces part of the mechanical torque transmission system with an electrical solution. Instead of relying solely on increasing mechanical torque through a larger magnetic coupler, the system uses a current-shaping circuit to modify electrical current characteristics, substituting mechanical size increases with electrical waveform control to achieve the same power output goal
2Power
If a larger magnetic coupler is used to increase peak torque capability, then sufficient power can be generated for downhole applications, but the device cannot be deployed in dimensionally constrained wellbores
Solution Approach 1:
The patent changes the electrical parameters of the power generation system by introducing a current-shaping circuit that modifies the current waveform. This parameter change allows the system to extract sufficient power from a smaller magnetic coupler by optimizing the electrical conversion process and eliminating high-frequency torque components that would otherwise require a larger coupler size
Solution Approach 2:
The patent introduces dynamic control through the current-shaping circuit, which actively manages the electrical current characteristics in real-time. This dynamic approach allows the system to maintain adequate power output from a smaller, dimensionally constrained magnetic coupler by adapting the electrical parameters rather than relying on fixed mechanical size increases
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 current-shaping circuit effectively increases the peak torque capability of dimensionally constrained magnetic couplers, allowing them to generate sufficient power for downhole tools by eliminating high frequency torque components, thus enabling the use of smaller couplers that can still meet power demands.
Implementation Method 1
The alternator may convert the mechanical energy into a current for the downhole tool
Implementation Method 2
torque transferred across the magnetic coupler can be used to generate mechanical energy
Data Source
AI summary
A power generation device is provided. The power generation device can include a magnetic coupler. The magnetic coupler can be associated with a maximum torque output. The maximum torque output of the magnetic coupler can be based on a size of the magnetic coupler. The power generation device can also include an alternator coupled to the magnetic coupling device. The alternator can convert kinetic energy received from the magnetic coupling device into a current. The kinetic energy can be generated by the magnetic coupler using a rotational force transferred across the magnetic coupling device. The power generation device can also include a power converter device coupled to the alternator to shape the current from the alternator such that the maximum torque output is sufficient to cause the power converter to output a threshold current sufficient for operating a well tool powered using the power generation device.