Stepper Motor Coil as Sensor for Status Detection
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Solution Overview
Problem
Stepper motors in applications like airplane systems require precise position control, but existing solutions rely on additional sensors to determine the motor's status, adding weight and complexity.
Innovation Solution
An integrated circuit within the stepper motor uses a sensor coil to detect the counter electromotive force, which indicates the motor's status, allowing for weight reduction by eliminating external sensors and providing feedback through differential signals processed by a differential amplifier, sample and hold circuit, and comparator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensors are used to determine the motor status, then measurement precision is improved, but weight increases
Solution Approach 1:
The motor's own coil serves as the sensor to detect its functional status. The coil naturally produces counter electromotive force during operation, which is used to determine whether the motor is turning or locked, eliminating the need for external sensors and reducing weight.
Solution Approach 2:
The coil performs dual functions: it acts as both the actuator component for generating motor force and as the sensor for detecting motor status through counter electromotive force measurement, eliminating redundant components.
2Measurement precision
If additional sensors are used to determine the motor status, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The motor's own coil serves as the sensor to detect its functional status. The coil naturally produces counter electromotive force during operation, which is used to determine whether the motor is turning or locked, eliminating the need for external sensors and reducing weight.
Solution Approach 2:
The coil performs dual functions: it acts as both the actuator component for generating motor force and as the sensor for detecting motor status through counter electromotive force measurement, eliminating redundant components.
3Measurement precision
If traditional sensor-based detection is used, then measurement precision is improved, but loss of substance increases
Solution Approach 1:
The motor's own coil serves as the sensor to detect its functional status. The coil naturally produces counter electromotive force during operation, which is used to determine whether the motor is turning or locked, eliminating the need for external sensors and reducing weight.
Solution Approach 2:
The coil performs dual functions: it acts as both the actuator component for generating motor force and as the sensor for detecting motor status through counter electromotive force measurement, eliminating redundant components.
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
Enables efficient detection of the motor's turning and locking status, reducing weight and complexity while maintaining precise control, allowing for lighter and more efficient systems like airplane components.
Implementation Method 1
the coil is adapted such that a rotor of the electro-motor induces a counter electro-motoric force in the coil when the rotor is turning
Data Source
AI summary
The present invention relates to a circuit for detecting a functional status of an electro-motor. Typical electro-motors need additional components to identify the functional status of the motor. This means additional weight for such motors determining the functional status. According to the present invention a circuit is provided using a part of a motor as a sensor for detecting the functional status of the electro-motor.