Abstract The operating resistance of a tandem disc conveyor is related to the characteristics of the transported material (particle size, moisture, viscosity), the loading height of the material on each disc, and the friction between the moving parts. Therefore, in order to meet the transportation requirements and ensure the drive motor operates at constant power, the motion parameters of the receiving system need to be adjusted over time according to the actual working conditions. This paper determines the mathematical model of the motion parameters of the receiving system, and finds that the relationship between the speed of the receiving motor and the speed of the receiving motor under constant power is nonlinear. Keywords Receiving system, drive motor, constant power, nonlinear, tandem disc conveyor Introduction The tandem disc conveyor is driven by a variable frequency speed-regulating motor 1 through a planetary gear reducer, which drives the drive wheel to rotate. At the inlet of the tandem disc conveyor, a screw conveyor provides uniform feeding. The screw conveyor and the tandem disc conveyor constitute the conveying system, and the motor 1 is a constant power motor. According to the analysis of the running resistance of the series disc pipe continuous conveyor in reference [1], in order to make the motor run at constant power under different material conditions (or the same material with different physical characteristics), the change of the conveyor running resistance is related to the loading height h of the material on each series disc, and the size of the loading height h depends on the flow rate Q of the material conveyed by the screw conveyor. The flow rate Q is related to the rotational speed n of the screw conveyor. Therefore, when the working condition of the conveying system changes, the flow rate of the conveyor can be controlled by controlling the rotational speed of the receiving drive motor 2, thereby controlling the series disc pipe continuous conveyor to run at rated power. The speed of the motor 2 is adjusted by a frequency converter. 1 Determination of the flow rate Q of the conveyed material As shown in Figure 1, it is a schematic diagram of the operating system of the series disc pipe continuous conveyor. The receiving system consists of motor 2, reducer 2, and screw conveyor. The productivity of the screw conveyor, i.e. the material flow rate Q, is (1) where F is the cross-sectional area of ​​the material being conveyed in the screw conveyor (m2) D1 is the screw diameter (m) φ is the filling coefficient ρ is the material bulk density (t/m3) V is the axial speed of the material, V=nT/60 (m/s) T is the screw pitch (m) n is the screw conveyor speed (r/min) Substituting the values ​​of F and V into equation (1) and considering the influence of the inclined arrangement on the material end area and productivity, the productivity of the screw conveyor is [align=center] Figure 1 Schematic diagram of the operation system of the series disc pipe continuous conveyor 2 Determination of the output torque TM of the drive system motor The output shaft torque TM of the drive motor 1 is given by assuming the diameter of the drive wheel of the series disc pipe continuous conveyor is d. Then, from reference [1], we get (3) where D— diameter of the series disk (m) γ— specific gravity of the material (N/m3) μ— friction coefficient of the wall surface to the material K— k=tanφ, φ is the internal friction angle of the material h— height of the material on a single series disk (m) H— conveying height of the entire series disk conveyor (m) L— spacing between series disks (m) During the operation of the series disks, the loading time of each series disk is 3 The determination of the rotation speed n2 of the receiving drive motor 2 To ensure the constant power operation of the drive motor 1, the calculation result P of equation (7) should be approximately equal to the rated power P1 of the motor 1 Taking the logarithm of both sides and rearranging, we can see that the speed of the drive motor n1 and the speed of the receiving motor n2 are nonlinear. 4 Conclusions 1) The calculation method for the amount of material transported by the series disc conveyor was determined. 2) In order to meet the requirements of the transportation task, the calculation method of the output shaft torque T[sub]M[/sub] of the drive motor was derived. It is known that T[sub]M[/sub] is not only related to the mechanical friction of the system, but also to the speed n[sub]2[/sub] of the receiving system motor. The relationship between them is nonlinear. In order to ensure that the drive motor runs under constant power, an intelligent control method is needed to control the speed of the receiving motor. According to the characteristics of this system, the PID neural network control method should be considered. References 1 Wen Bangchun. The important role of modern mechanical product design in new product development Journal of Mechanical Engineering, 2003(10)43～51 2 Luan Lijun, Ren Liyi. Mechanical static analysis of the middle straight section of the series disc pipeline continuous conveyor. Journal of Liaoning University of Engineering and Technology, 2002, (5). 649 651 3 Luan Lijun, Ren Liyi. Mechanical Analysis of the Straight Section in the Middle of a Series Disc Pipeline Continuous Conveyor. 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