Affiliations: [a] Key Laboratory of Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, China | [b] Key Laboratories for National Defense Science and Technology of Innovative Micro-Nano Devices and System Technology, Chongqing University, Chongqing, China | [c] State Key Laboratory of Power Transmission Equipment {&} System Security and New Technology, Chongqing University, Chongqing, China
Correspondence:
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Corresponding author: Xitian Pi, Key Laboratory of Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400030, China. E-mail:pixitian@cqu.edu.cn
Abstract: As the core component of a precision power operation system for
Neurosurgery, medical micro-motors need to have characteristics of high
reliability, high speed, high precision, low temperature rise and capability
of repeated autoclave sterilization. Therefore, high requirements of design
and manufacture are put forward. In view of the above, a super-high speed
micro motor with a micro flow channel auxiliary cooling system was proposed
in this paper. We used Ansoft to analyze the magnetic field distribution of
the motor and operating performances at rated speed, and calculate the motor
loss and motor temperature distribution. The results showed that the motor
speed could reach 89000 Rpm in stable operation and the output power was 60
W. The temperature rise of the rotor and stator core was very low, when the
temperature of the liquid coolant in cooling system was 20°C,
which could efficiently prolong load working hours. This research provided a
new idea for the design of a super-high speed micro-motor utilized in
neurosurgical power operation system.
Keywords: Super-high speed medical motor, structure design, cooling system, electromagnetic field analysis, temperature field
