Abstract: In this paper,a concept for a small Wankel pump integrating the actuation component into the execution structure is proposed.The motor drive component is integrated into the execution structure of the Wankel pump,which not only has the original pumping function but also reduces the number of drive mechanisms to shorten the transmission path and improve the efficiency and performance to promote the miniaturization and integration process of the Wankel pump.The complex curve of cylinder shape line envelope of triangular rotor is replaced by simple circular arc curve and the geometric mathematical model of cylinder shape line and triangular rotor shape line is established to simplify the processing.Through the analysis of the dynamic model of the triangular rotor,the mechanical characteristics of the motor components and the working chamber volume of the Wankel pump,the matching mechanism of the output speed,the output flow and the structural parameters,the input voltage and the magnetic induction intensity is obtained.The high-speed camera is used to observe and analyze the flow field in the working chamber of the pump to verify its pumping function and obtain the flow characteristics of the working chamber fluid in the pump.An experimental platform is built to test the output pumping performance of speed of revolution,flow rate and pressure.The experimental results show that the maximum output flow rate reaches 7.55 L/min and the volumetric efficiency up to 38.47% when the input voltage stands at 18 V and the magnetic induction intensity 23 mT,corresponding to a speed of revolution of 768.86 r/min,an output flow rate of 7.55 L/min and an output pressure amplitude of 7 kPa.The speed of revolution,flow rate and pressure amplitude all increase with the rise of voltage and magnetic induction intensity.