Magnetic Pole Conveyance Layout for Low-Heat Position Detection
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Solution Overview
Problem
Existing conveyance apparatuses face issues with increased heat loss due to winding resistance and deviation from the conveyance path when using electromagnetic attractive forces for container carrier positioning, particularly in specimen analysis systems.
Innovation Solution
A conveyance apparatus with a magnetic pole and adjacent magnetic poles, where currents are supplied to control magnetic saturation levels, improving position detection sensitivity while minimizing heat loss and preventing path deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current is increased to cause magnetic saturation for position detection, then position detection sensitivity is improved, but winding heat loss increases
Solution Approach 1:
The magnetic pole is divided into multiple teeth, with each tooth having its own winding. This segmentation allows the magnetic circuit to be divided into multiple parallel paths, reducing the current required in each winding to achieve the same magnetic saturation effect, thereby reducing heat loss while maintaining detection sensitivity.
Solution Approach 2:
Multiple teeth and their windings are combined to work together in achieving magnetic saturation. The combined magnetic effect of multiple teeth provides sufficient saturation for position detection while distributing the current load, reducing overall heat loss compared to a single large winding.
2Measurement precision
If coils around the attracting coil are excited indiscriminately to generate repulsive force, then container carrier position control is improved, but coil heat loss is excessively increased
Solution Approach 1:
Different teeth are assigned different functions based on their local position: some teeth generate attractive force for propulsion, while adjacent teeth generate repulsive force for positioning and stopping. This local differentiation allows precise control without requiring all coils to be excited simultaneously, reducing overall heat loss.
Solution Approach 2:
The excitation of windings is performed periodically and selectively rather than continuously and indiscriminately. Windings are activated in a sequence that provides the necessary attractive and repulsive forces at appropriate times during the container carrier's movement, reducing energy waste from continuous excitation.
3Reliability
If current is increased to control conveyance speed and prevent collision, then conveyance control is improved, but winding heat loss increases
Solution Approach 1:
The magnetic pole structure with multiple teeth allows dynamic control of magnetic flux distribution. By selectively activating different tooth windings, the system can dynamically adjust the magnetic force profile to control conveyance speed and prevent collisions without requiring continuously high current levels, thereby reducing heat loss.
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
Enhances position detection sensitivity of container carriers by controlling magnetic saturation levels, reducing heat loss, and maintaining the conveyance path alignment.
Implementation Method 1
a magnetic field is generated at the magnetic pole by a voltage applied by a drive circuit, and a thrust is generated at the magnet by the magnetic field to convey a conveyed object in a horizontal direction
Implementation Method 2
a permanent magnet is provided at a container carrier such as a holder that holds a specimen, and an electromagnetic attractive force generated by supplying a current to a winding of a magnetic circuit provided at a conveyance surface is used as a thrust of the container carrier
Implementation Method 3
a container carrier position detection method using a magnetic saturation phenomenon of a magnetic circuit due to a magnetic flux of a permanent magnet
Data Source
AI summary
A conveyance apparatus includes a magnet on a conveyed object side, a magnetic pole including a tooth made of a ferromagnetic body and a winding outside the tooth, a yoke for forming a magnetic circuit comprising a ferromagnetic body, the magnetic circuit coupling a plurality of the magnetic poles, and a drive circuit for supplying a current to the winding. A magnetic field is generated at the magnetic pole by a voltage applied, and a thrust conveys the object in a horizontal direction. The magnetic pole includes a first magnetic pole where current is supplied to apply a force in a conveyance direction, and at least one adjacent magnetic pole, the current is supplied to a windings of the adjacent and first magnetic poles simultaneously, and a magnetic saturation level is controlled by a magnetic flux generated by the at least one adjacent magnetic pole.