International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
BALANCING DYNAMIC LOAD WITH ADAPTIVE POWER SYSTEM FOR THE DC MOTOR CONTROL 1Mahamuni
Mangesh Chandrakant, 2Prof. K Chandra Obula Reddy,
1ME,MSS
College of Engineering and Tech,JalnaAffiliated to Dr.BAMU, Aurangabad, Maharashtra, India. professor,MSS College of Engineering and Tech,JalnaAffiliated to Dr.BAMU, Aurangabad, Maharashtra, India. ---------------------------------------------------------------------***--------------------------------------------------------------------2Ass
Abstract: A DC motor is any of a class of electrical machines
regulation technique the performance is maintained at all operating conditions. A block diagram of a conventional shipboard power system is shown in the Figure 1. Conventional systems have focused heavily on providing well-regulated voltages and clean power to the corresponding load. If the voltage dynamics seen at the load are to be minimized, the output impedance of each converter stage is minimized by using small series inductance values, large shunt capacitance values, and control loops with high bandwidths. However, to prevent the mid to low frequency load dynamics this type of system is presented from propagating back to the distribution bus and generator.
that converts direct current electrical power into mechanical power. A new Adaptive Power System (APS) is used to mitigate the negative impacts levied on the platforms resulting from large dynamic loads is proposed in this paper. The Navy’s future and near-term high-energy sensors and energy weapons will consume a large portion of the resources of the intended ship platform. The APS has used to maintain generator/prime-mover reliability, and also it is used to improve sensor/weapon performance or improve metrics such as system weight, cooling demands, and ship fueling costs. Many of these new systems will have extreme dynamic power profiles, including both periodic and aperiodic characteristics. Here we are using dc motor because it has several advantages. Such as, Speed control over a wide range both above and below the rated speed High starting torque, Accurate steep less speed with constant torque etc. The APS design is presented along with simulation results verifying the concept. By using the simulation results we can analyze the proposed method.
When compared with the passive filter method (brute-force method) the APS can support the pulsed load at a fraction of the size and weight needed. If using the active load method without excessive power dissipation as would exist (throwaway method), and for some specific applications without timeline restrictions as would be needed if using a refresh or recharging type system (restricted-timeline method).
1. INTRODUCTION The APS is similar to the active filter concept whereby the active filter provides the current needed to maintain the quality of the load current required by the upstream power system. Duty cycles can vary from small to continuous and, for some cases, the peak power demands can be above the capability of the ship power plant. A DC motor is any of a class of rotary electrical machines that converts direct current electrical power into mechanical power. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor. These types of extreme power profiles cannot be supported with conventional power systems. The Adaptive Power System (APS) concept presented in this paper can be an enabling technology for sensors or weapons with large dynamic loads, which without the APS would be incompatible with the upstream shipboard generator and distribution bus. The APS consists of energy storage, a bidirectional current source, and innovative control techniques. These innovative control techniques increase the energy storage utilization, thus minimizing the energy storage size. The linear behavior of the outer-energy loop
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Fig. 1. A block diagram of a notional power system with the APS attached The time limit for the enhanced operation is limited by the APS size, the size of the energy storage needed to provide the delta power, and the maximum average power allowed. This maximum allowed average power determines the corresponding duty cycle of this enhanced operation and hence the quickest allowed recharge time of the APS energy storage. Consequently, a new approach is needed to manage the load dynamics of emerging Navy systems The new Adaptive Power System (APS) specifically addresses this need. The APS can be used to efficiently mitigate bus disturbances and reduce stress to the shipboard gensets by converting the dynamic power load seen by the shipboard power system into an equivalent rolling time average –
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