Abstract: Motor is an indispensable part for robots to complete movement and various operations in strong radiation environments. To make the motor more reliable, motor driver, the key part of the motor system, is taken as the research object. The redevelopment design based on radiation hardening has been carried out. Through radiation resistance test and screening of COTS electronics, the partition design of driver circuit based on the electronics’ intrinsic radiation resistance, and the shielding design based on the electronics’ radiation resistance and the partitioned circuit, a three-phase brushless DC motor driver with an output power of 2 kW and a tolerance to total dose of more than 2 000 Gy (⁶⁰Co) was designed. Its prototype manufacturing and related verification test will be carried out in the future.

Key words: strong radiation environment, robot, motor driver, radiation hardening, electronics