Rotor Parameter Sensor for Electric Drive Diagnostics
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Solution Overview
Problem
There is a lack of diagnostic systems for the rotor of electric engines or motors in vehicles, which can lead to errors or failures such as temperature increases, demagnetization, and mechanical stress, resulting in potential vehicle safety issues and motor breakdowns.
Innovation Solution
A diagnostic system using sensors to monitor rotor parameters like temperature, acceleration, and magnetic fields, with wireless transmission of data to a control unit for real-time monitoring and error detection, enabling safe operation mode activation and preventing severe damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no diagnostic system is installed in the rotor, then the device complexity is reduced, but the reliability of the electric motor decreases due to undetected errors and failures
Solution Approach 1:
The diagnostic system is merged with the rotor structure itself. Sensors (temperature, acceleration, magnetic field) are integrated into the rotor, and the evaluation unit is positioned within the rotor assembly. This integration allows reliability monitoring without adding external diagnostic equipment, thus improving reliability while minimizing additional complexity.
Solution Approach 2:
The rotor performs self-diagnosis through integrated sensors that continuously monitor its own operational parameters (temperature, acceleration, magnetic field strength). The evaluation unit processes these signals locally within the rotor assembly, enabling the rotor to self-assess its condition and detect errors without external diagnostic systems.
2Measurement precision
If multiple sensors are integrated into the rotor for comprehensive monitoring, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
A single evaluation unit within the rotor assembly processes signals from multiple different sensor types (temperature sensors, acceleration sensors, magnetic field sensors). This multi-functional evaluation unit enables comprehensive monitoring of various rotor parameters without requiring separate processing systems for each sensor type, thus improving measurement precision while controlling complexity.
Solution Approach 2:
Multiple sensors measuring different physical quantities (temperature, acceleration, magnetic field) are integrated into the single rotor structure. The evaluation unit combines and processes signals from all these sensors centrally, enabling comprehensive rotor monitoring through a unified system rather than separate diagnostic systems for each parameter.
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 system extends the rotor's operating range and lifetime by detecting errors early, avoiding critical conditions, improving engine performance, and optimizing efficiency by monitoring temperature and resistance.
Implementation Method 1
using a temperature sensor adapted to sense or measure the temperature in the rotor
Implementation Method 2
an acceleration sensor is used that is adapted to monitor the rotation frequency of the rotor. The acceleration sensor is arranged and adapted in order to sense accelerations or vibrations of the rotor
Implementation Method 3
a rotor position sensor is used that is adapted to monitor the rotor position. By means of the rotor position sensor the radial position of the rotor can be detected
Data Source
AI summary
A rotor parameter sensor is used for electric drives. A rotor of an electric engine or motor is monitored by a sensor sensing one or more physical observables or operation parameters. Furthermore, a method and system is used for monitoring an electric engine or motor for use in electric or hybrid vehicles.