DESIGN AND IMPLEMENTATION OF REGULATORY SYSTEM CONFIGURATION LEAD-ACID BATTERY FOR BLDC MOTOR

• Main Author: Octora Pristisahida, Adelia
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/63393
• Institution: Institut Teknologi Bandung

Four-wheel vehicle is a vehicle that is popular in developing countries such as Indonesia. To reduce the emissions released by oil-fueled vehicles much research on electric vehicles, only use electrical as energy sources. This vehicle using battery as energy storage. Generally, an electric vehicle using a single battery that has a large power, such as electric bicycles use a 24 volt 20 Ah battery with a power of 500 watts. However, a battery for an electric car is not sufficient because it requires a power greater than 500 watts, so the need to use multiple batteries simultaneously arranged in series. Maximum power possessed enormous electric car with a maximum speed which is greater, for example Evina car with a maximum speed of 120 km/h. This speed is well on track between cities such as tolls. However, the car often used in inner-city average speed is 50 km/h when the road is smooth or 30 km/h when the traffic. Automatic battery used must be lowered to the speed reached. In addition there are many points of Stop & Go so that the electric car is difficult to use the maximum rating. The method has been used is a DC / DC Conventer like buck converter and so on. In this study, the method used to reduce the power of the batteries is to change the configuration of the serial to parallel, so that the battery voltage will automatically be reduced by half. So the speed will be reduced by half. Batteries with parallel configuration can be used to track in the city, while the batteries with a series configuration can be used to track in the city. In addition to the batteries, an important component in electric vehicles are driving, one of the drivers that are commonly used are BLDC motors. BLDC motors in this study will be used as a simulation of an electric car with a maximum speed of 500 rpm. This research aims to develop a system that can change the configuration of two batteries from serial to parallel and vice versa, which is integrated with the BLDC motor drive system using a PWM speed control. This study was conducted to determine the characteristics of the battery voltage when discharging to a series configuration and a parallel configuration. It is also to see the effect of the configuration of series and parallel configurations of the BLDC motor. In this study, the battery used is the Lead Acid battery 12 volt 26 Ah. The thing done is to observe the characteristics of the battery voltage drops open when emptying in a series configuration and a parallel configuration with a fixed load current. And observation of the effects of series and parallel configurations to speed BLDC motor and battery power is generated. Hopefully, by the parallel configuration can be more efficient battery use and still able to achieve the expected speed. In this study was found in a parallel configuration voltage drop both batteries at minute 105 be the same even though the initial voltage of both batteries are not the same. This shows that the parallel configuration of the current issued unbalanced battery. When this happens constantly in the battery, the battery will be damaged soon (Gogoana, 2013). This can be overcome if the battery used has a type and comes from the same plant, and never used before. And the battery must be accompanied Battery Management System to observe and control the activity of the battery. But in this study MSB is not used. For BLDC motor was found that the battery removed to achieve a speed of 75 rpm, 93 rpm and 114 rpm, is 5.16 watts, 5.88 watts and 7.68 watts. BLDC motors are used improperly installed load and the load is assumed to be constant. While the configuration of the voltage drop in the second series to be balanced even though the battery voltage of the battery is not the same beginning. This indicates that the configuration of the current series issued by the battery size. For BLDC motor was found that the battery removed to achieve a speed of 75 rpm, 93 rpm and 114 rpm, is 6 watts, 7.2 watts and 8.4 watts. Compared with the power output in a parallel configuration, the configuration of power in the larger series. It can be concluded that the low-speed parallel configuration for more efficient power use.