Speaker
Description
This report presents the preliminary design of two motor drivers developed for the S3FEL project: one for cavity tuning and the other for coupler adjustment. Both drivers control stepper motors to regulate the resonant frequency and coupling degree of the 1.3 GHz superconducting cavity, respectively. Each driver comprises two functional modules: a motor driver board and a limit signal conditioning circuit. The driver board translates low-power control signals (enable, direction, speed) into high-power outputs to drive the motor. Key design features include optocoupler-based isolation between control and power stages to prevent interference, subdivided stepping for improved positioning accuracy and motion smoothness, and real-time current monitoring to ensure correct output. The limit signal conditioning circuit provides excitation to the limit switches, samples their status, and returns the signals to the controller. Both drivers also supply a holding current to maintain motor position when stationary. Experimental validation confirms that the designed drivers satisfy the operational requirements for precise tuning and coupling control in the S3FEL system.
Funding Agency
the National Natural Science Foundation of China (Grant No. 12405221)
| Paper status | Proceeding files received |
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