- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
In order to drive both positive and negative directions in the shaft of a DC motor connected to a DC/DC Buck power electronic converter, this paper presents a new topology of the DC/DC Buck power electronic converter–DC motor system. To this end, a full–bridge converter is placed between the Buck converter and the DC motor. The deduction of the mathematical model step-by-step, from applying Kirchhoff’s voltage and current laws is shown. Later, an analysis in steadystate is presented, obtaining the system equilibrium point. Finally, numerical simulations are performed through Matlab– Simulink, showing the viability of our proposal.
Manipulators and mobile robots, machine tools, railways, reversible rolling mills and elevators are just a few applications of DC motors. Thus, DC motors are vastly used in systems that require to be controlled. The most common way to control the angular velocity in one direction is adjusting the motor armature voltage . Likewise, pulse width modulation (PWM) is another usual method for controlling the angular velocity of a DC motor. Nevertheless, due to the hard switching strategy of the PWM, abrupt changes occur in the voltage and current of the DC motor . With the purpose of solving these problems, DC/DC power electronic converters are used, which allow a smooth starter of the motor. Generally, using these DC/DC power electronic converters it is intended either to control a desired angular velocity profile or a desired angular position trajectory. Specifically, the DC/DC Buck power electronic converter reduces the noisy shape due to the hard switching of the PWM.
In this article a new topology for the DC/DC Buck power electronic converter–DC motor system has been presented. The new proposal, is achieved placing a full–bridge converter between the DC/DC Buck power electronic converter and the DC motor. Thanks to this, the motor shaft can rotate in both positive and negative directions. Firstly, the mathematical system model under study was obtained. Later, a steady-state analysis was performed. Finally, numerical simulations showed the validity of the proposed system.
Currently, it is developing an experimental setup; this in order to experimentally validate the mathematical model obtained.
Concerning future work, it would be interesting to design and simulate a controller for the mathematical model obtained, aiming to control the angular velocity of the DC motor shaft.