Electric Pump Rotation Sensing With Integrated Magnetic Monitoring
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Solution Overview
Problem
Existing electric pumps in vehicles lack effective monitoring of their rotation, which is crucial for ensuring proper operation and maintenance.
Innovation Solution
The electric pump incorporates a control assembly with a circuit board, magnetic element, and sensor, where the rotating assembly is connected to the magnetic element in a fixed or limited manner, allowing the sensor to monitor the rotation by sensing the magnetic field changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor and magnetic element are added to monitor rotation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The control assembly merges multiple functions into a single integrated unit: the circuit board serves as both the control platform and mounting base for the sensor, while the magnetic element is integrated with the rotating assembly. This combination achieves rotation monitoring without requiring separate monitoring devices, thus improving measurement precision while minimizing the increase in device complexity.
Solution Approach 2:
The magnetic element acts as an intermediary between the rotating assembly and the sensor. Instead of directly measuring mechanical rotation, the sensor detects magnetic field changes produced by the magnetic element, enabling non-contact rotation monitoring. This intermediary approach simplifies the measurement mechanism while maintaining high precision.
2Measurement precision
If the sensor is placed on the circuit board facing the magnetic element, then measurement precision is improved, but the risk of harmful factors to the circuit board increases
Solution Approach 1:
The control assembly is segmented into two functional zones: the sensor and magnetic element are positioned to face each other for precise magnetic field detection, while the circuit board is designed with this specific orientation to minimize exposure. The segmentation allows the sensitive electronic components to be protected from the working medium while maintaining effective sensor-magnetic element interaction for accurate measurement.
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 enables accurate monitoring of the pump's rotation, enhancing maintenance efficiency and reliability by detecting magnetic field variations, thus improving operational control.
Implementation Method 1
The control assembly includes a circuit board, a magnetic element and a sensor. The magnetic element is within the sensing range of the sensor, and the projection of the magnetic element on the first surface at least partially overlaps with the sensor
Data Source
AI summary
An electric pump is provided, having a first cavity, a control assembly and a rotating assembly, the control assembly and at least part of the rotating assembly being located in the first cavity. The control assembly includes a circuit board, a magnetic element and a sensor; the circuit board is in electrical and/or signal connection to the sensor; the end portion of the rotating assembly close to the circuit board is fixedly or limitedly connected to the magnetic element; the circuit board includes a first surface facing the magnetic element; at least part of the sensor is located on the first surface; the magnetic element is within the sensing range of the sensor; the projection of the magnetic element on the first surface overlaps the sensor, or the sensor is located in the projection range of the magnetic element on the first surface.