Vol. 337 No. 4 (2026)
DOI https://doi.org/10.18799/24131830/2026/4/5504
Fault-tolerant brushless DC motor for an electric oil pump
Relevance. Oil production is one of the priority sectors of the Russian economy. Brushless DC motors are widely used to drive well pumps in this industry. One of the main advantages of brushless DC motors is their relatively compact size compared to other types of electric motors. This makes them more suitable for use in confined spaces such as oil wells or offshore platforms. Ensuring reliable and long-term operation of these mechanisms is critical for improving their operational efficiency. A failure of the brushless DC motor can lead to a well shutdown and significant economic losses. Therefore, improving the fault tolerance of these motors is an extremely important task for oil and gas companies. One of the approaches to solving this problem is the development of fault-tolerant circuits and control systems for brushless DC motors. Such systems must ensure stable operation under conditions of loss of one or more supply phases. For this reason, fault-tolerance becomes a key factor in the selection of a brushless DC motor and the design of its control system. Aim. To develop a fault-tolerant control scheme that ensures the operation of a brushless DC motor actuator in the event of loss of connection with certain power supply phases. Object. Brushless DC motor. Methods. Electric machine control theory, mathematical modeling, simulation. Results. The main result of this research is the improvement of the pump brushless DC motor performance under emergency conditions through the application of a fault-tolerant control scheme. The authors have developed a mathematical model of the electric motor for use as an actuator of a centrifugal pump. They implemented a simulation model of the motor and pump based on the mathematical model. Using the simulation model, the authors obtained the pressure-flow characteristics of the system under emergency phase-loss conditions and carried out the analysis of the simulation results.
For citation: Odnokopylov G.I., Rozaev I.A., Tinnikov P.E., Bragin A.D., Lyapunov D.Yu., Pantyukhina E.V., Bolshakov R.S. Fault-tolerant brushless DC motor for an electric oil pump. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 4, pp. 207-219.
Keywords:
brushless DC motor, mathematical model of a brushless DC motor, electrically driven centrifugal pump, fault-tolerant control scheme, emergency operation mode, phase loss, fault tolerance
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