E-Bike Drive Assembly Start-Up Detection via Test Torque

The patent extracts the essential detection requirement from a complex multi-sensor system and implements it using only the existing motor current sensor. By taking out only the necessary detection function (rotor position and current magnitude) that can be derived from motor current analysis, the system achieves reliable torque generation detection without adding complex sensor arrays or mechanical switches.

The patent replaces mechanical detection methods (such as mechanical switches, Hall sensors, or multiple physical sensors) with an electrical field-based detection approach. By analyzing the motor current characteristics and rotor position through electrical measurements alone, the system substitutes mechanical detection systems with a purely electrical detection method, reducing device complexity while maintaining reliability.

The patent performs preliminary detection of rotor position and current magnitude continuously or at regular intervals before actual torque generation is needed. By having this detection data already available in advance, the system can immediately determine when torque generation conditions are met without performing additional detection steps at the moment of activation, thus maintaining high detection accuracy while minimizing detection time.

The patent detects only the critical parameters (rotor position and current magnitude) necessary for torque generation detection, rather than comprehensively detecting all possible drive train conditions. This partial detection approach focuses resources on the most important parameters, achieving sufficient detection accuracy for the specific application while reducing overall detection time.