Experimental verification of chopper fed DC series motor with ANN controller

ABSTRACT:In this paper, to achieve high step-up voltage gain and high efficiency, a novel high step-up ratio using clamp-circuit in addition capacitor and diode along with the boost inductor is proposed. The capacitor gets charged during the switch-off period and discharged during the switch-on period by the energy stored in the inductor which leads to high voltage gain. The leakage-inductor energy of the coupled inductor is recycled with a passive clamp circuit. Thus, the voltage stress on the main switch is reduced. The switch with low resistance R DS is used to reduce the conduction loss which increases the efficiency. The operating principle and steady-state analyses are discussed in detail. Finally, a prototype circuit with 24-V input voltage, 48-V output voltage, is implemented in the laboratory to verify the performance of the proposed converter.

Section: Introductionmentioning

confidence: 99%

Modelling and Simulation of High Step-Up DC/DC Converter for On-Site Generation System

anya¹,

kumar²,

anandam³

2015

“…The energy sources used in DG systems usually have different output characteristics, and for this reason, power electronic converters are employed to connect these energy sources to the grid, as shown in Fig. 1.The power electronic front-end converter is an inverter whose dc link is fed by an ac/dc converter or by a dc/dc converter, according with the DG source type [6][7]. The commercial front-end inverters are designed to operate either as grid-connected or in island mode.…”

Section: Introductionmentioning

confidence: 99%

Power Quality Features Improvement In Single -Phase Grid -Connected Inverter With Non-Linear Loads

K.Prabha¹

2015

ABSTRACT:The increasing application of nonlinear loads may cause distribution system power quality issues. This work presents a control of Single-phase Grid Interactive Inverters with nonlinear loads and a technique for Harmonic compensation and power factor correction of nonlinear loads employing Current Controlled Voltage Source Inverter. This work will focus on the design methodology and the analysis of control strategy which allows the compensation of harmonics and phase displacement of the input current, for non-linear loads. The Utility-Connected Inverter should operate at both Stand-alone and Grid-Connected modes. However, the waveform qualities of the grid current in GridConnected mode and the output voltage in Stand-alone mode are poor under the nonlinear critical load with the conventional control. The impact of the nonlinear load on the grid current is analyzed. Harmonics problem in industrial power systems with non-linear loads are presented. By adding the load current into the filter inductor current loop, the influence of the nonlinear load on the grid current can be eliminated, and the waveform quality of the output voltage in stand-alone mode can be improved. The control method is simple and easy to be achieved. Simulation results from a Full-bridge Grid-Interactive Inverter with a Diode Rectifier load verify the theoretical analysis.

“…In view of this, this paper discusses how to convert the kinetic energy into the electrical one that can be recharged to the battery. [10][11][12][13] Thus, both the electric brake and energy regeneration are achieved A mechanical brake system is also very important for EVs' safety and other operations Coordination of EV mechanical braking and regenerative braking is achieved by a single foot pedal: The first part of the foot pedal controls the regenerative braking, and the second part controls the mechanical brake [6][7][8].This is a seamless transition from regenerative braking to mechanical braking. It cannot be simply achieved by traditional ICE vehicles .…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of BLDC Motor Using Regenerative Braking for Electric Vehicle

G.Maruthaip¹,

Ian²,

Ramkumar³

2015

ABSTRACT:In this paper proposes a simple but effective method of electric brake with energy regeneration for a brushless dc motor, of electric vehicle (EV). BLDC motor control utilizes the traditional proportional-integralderivative (PID) control and the distribution of braking force adopts fuzzy logic Conventionally, EVs use mechanical brake to increase the friction of wheel for the deceleration purpose. However, from the viewpoint of saving energy, the mechanical brake dissipates much energy since the EV's kinetic energy is converted into the thermal one. In view of this, this paper discusses how to convert the kinetic energy into the electrical one that can be recharged to the battery. Thus, both the electric brake and energy regeneration are achieved. In comparison to other solutions, the new solution has better performance in regard to realization, robustness and efficiency. In this paper, we have chosen the three most important factors: SOC, speed and brake strength as the fuzzy control input variables. We have found that RBS can obtain appropriate brake current, which is used to produce brake torque. At the same time, we have adopted PID control to adjust the BLDC motor PWM duty to obtain the constant brake torque. PID control is faster than fuzzy control so the two methods combined together can realize the smooth transition since the braking kinetic energy is converted into the electrical energy and then returns to the battery, the energy regeneration could increase the driving range of an EV.