Advanced Mathematical Calculation Model of Single-Stage RCG

Lu, Mengkun; Zhang, Mengjie; Yi, Xianglie; Zhuang, Zhexin

doi:10.1109/tps.2022.3159533

Cited by 10 publications

(12 citation statements)

References 14 publications

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“…In (7), the turn‐on voltage of the diode is V D . Simultaneous (5), (7), (3), and

\frac{dL\left(x,i\right)}{dt}=\frac{dL\left(x,i\right)}{dx}\cdot \frac{dx}{dt}

the launch process of the REML can be solved using Runge–Kutta method [17]. In order to make the calculation process clearer and easier to understand, a mathematical calculation block diagram is constructed based on the above equations as shown in Fig.…”

Section: Theoretical Analysis Of the Solving Methodsmentioning

confidence: 99%

“…When the capacitor C begins to discharge, the freewheeling diode D does not work until u c (t) drops to the diode's turn-on voltage, the circuit changes from an resistor-inductor-capacitor (RLC) to an resistor-inductor (RL) circuit [16]. Therefore, the circuit equation needs to be divided into two parts to analyze, the theory also states in Refs [17][18][19].…”

Section: To Get the Currentmentioning

confidence: 99%

“…the launch process of the REML can be solved using Runge-Kutta method [17]. In order to make the calculation process clearer and easier to understand, a mathematical calculation block diagram is constructed based on the above equations as shown in Fig.…”

Section: To Get the Currentmentioning

confidence: 99%

See 2 more Smart Citations

Research on Electromagnetic Dynamics Algorithm of Reluctance Launcher during Acceleration Process

Mengkun,

Junhong,

Xianglie

et al. 2023

IEEJ Transactions Elec Engng

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The structure of the reluctance electromagnetic launcher (REML) is equivalent to an inductor with a movable iron core. The dynamic current in the launching process is easy to be measured by instruments, but the data such as the position, velocity of the projectile and the equivalent inductance are not only difficult to solve by analytical methods, but also difficult to measure by instruments, which seriously hinders the development of the control technology. To solve this problem, referring to the method of introducing the inductance matrix into the motor algorithm model to realize semi-analytic calculation, a special algorithm model is proposed to calculate the launch process data of REML based on the current data. According to the working characteristics of the reluctance coil transmitter, it is pointed out that its inductance matrix should be specifically expressed as a three-dimensional data table rather than a traditional two-dimensional table. The current can be obtained by closed-loop calculation according to the proposed algorithm block diagram when the circuit parameters are known, or measured by instruments when the circuit parameters are unknown, and then the launch process data is obtained indirectly through calculation. In this study, an experimental platform was built, and the algorithm model was established using MATLAB/Simulink. The comparison of the dynamic launch process data of the finite element method (FEM) showed that the method was feasible.

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“…In (7), the turn‐on voltage of the diode is V D . Simultaneous (5), (7), (3), and

\frac{dL\left(x,i\right)}{dt}=\frac{dL\left(x,i\right)}{dx}\cdot \frac{dx}{dt}

Section: Theoretical Analysis Of the Solving Methodsmentioning

confidence: 99%

Section: To Get the Currentmentioning

confidence: 99%

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Research on Electromagnetic Dynamics Algorithm of Reluctance Launcher during Acceleration Process

Mengkun,

Junhong,

Xianglie

et al. 2023

IEEJ Transactions Elec Engng

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“…The analysis of the reluctance launchers is complicated and difficult due to the non-linear B-H characteristics of the ferromagnetic projectile used in the reluctance launchers. Therefore, in the investigation of reluctance launchers, a software that uses finite elements analysis is utilized [14,16,17,20,21,[24][25][26][28][29][30][31][32].…”

Section: Methodsmentioning

confidence: 99%

“…But, then there will be contact and friction. The equivalent circuit diagram of the reluctance launcher is given in Figure 1 [21]. Here, the capacitor is charged by the source voltage, then the switch position is changed and the energy at the capacitor is supplied to the coil.…”

Section: 𝐸𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑐𝑦mentioning

confidence: 99%

Effect of Change of Reluctance Launcher Parameters on Projectile Velocity

Sari

2023

IEEE Access

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In this study, it is aimed to increase the projectile velocity by changing some parameters of the reluctance launcher. Studied parameters are the initial position of the projectile, the coating of the coil with ferrite, the coil length and the barrel outer diameter. A 3D Maxwell model of the reluctance launcher was generated to examine the effect of the change of these parameters on the projectile velocity. After the 3D model of the launcher was generated, analysis was done for each parameter. During the analysis for a parameter, the other parameters were kept constant. As a result of the analysis of the projectile position, it was determined that the projectile velocity is the highest when the projectile position is -2. It has been determined that the velocity of the projectile increases if the coil is coated with ferrite. It has been determined that the projectile velocity is the highest when the coil length is 7 cm. It has been determined that the highest projectile velocity is obtained when the barrel outer diameter is 18 mm. Using these results, the Maxwell model of the improved launcher was generated. The projectile velocity in the Maxwell model of the initial launcher is 19.24 m/sec. The projectile velocity of the improved launcher in the Maxwell model is 25.8 m/sec. By improving the launcher, a velocity increase of 34.09% was achieved. Later, this launcher was built and the parameters were investigated experimentally. In the experimental work, the projectile velocity of the initial launcher was measured as 19.11 m/sec, and the projectile velocity of the improved launcher was measured as 24.9 m/sec. As a result of the experimental work, a velocity increase of 30.29% was obtained by improving the launcher.

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