Electromagnetic Brake Temperature Detection via Torque Thresholds

The patent uses torque sensor readings as an intermediary parameter to indirectly monitor brake temperature. Instead of directly measuring temperature with thermal sensors, the system uses torque measurements during brake engagement to infer temperature conditions, as torque characteristics change with temperature. This intermediary approach provides temperature monitoring capability without the complexity and cost of direct temperature measurement systems.

The patent replaces thermal measurement systems with mechanical torque sensing. By substituting the mechanical torque sensor data for thermal measurement, the system achieves temperature monitoring functionality using existing mechanical components rather than introducing separate thermal measurement infrastructure, thereby reducing device complexity.

The patent implements a feedback mechanism where the controller continuously monitors torque sensor readings during brake operation. When the torque readings indicate that brake temperature is approaching the upper threshold of the operating range, the controller automatically reduces the duty cycle or stops the brake to allow cooling. This feedback loop enables the system to maintain high productivity when conditions permit while preventing temperature-related damage.

The patent dynamically adjusts the duty cycle of the electromagnetic brake based on real-time torque measurements. Rather than operating at a fixed duty cycle, the system modifies operational parameters in response to temperature indicators, allowing maximum productivity during normal operation while automatically reducing load when temperature thresholds are approached, thus preventing thermal damage.

The patent makes the existing torque sensor serve multiple functions: it continues to provide torque control information for normal brake operation while simultaneously providing temperature monitoring data through threshold comparison. By making the torque sensor universal for both control and monitoring purposes, the system achieves temperature boundary detection without adding separate sensing infrastructure, thereby avoiding increased device complexity.

The system uses its own operational parameters (torque readings) to monitor its thermal state. The torque sensor, already present for control purposes, is also used for temperature boundary detection, allowing the system to self-monitor without external assistance or additional components. This self-service approach eliminates the need for separate monitoring hardware.