Previous Works versus The Proposed Alternative

222 The first or second solutions surely can be done as long as time permits. owever the third choice is literally more challenging in the way that it can be an alternative for future practice. The fact that a diode drops voltage when it flows a forward current is here presumed to be the focal solution. Although it will result in lower conversion efficiency, the solution may still fit the need for a small power voltage converter because the energy loss will be somehow relatively small. The A G silicon power diode is here predicted to be a good choice considering that its forward current capacity suits client’s requirement and that it is widely available in the market. ts price in the market is also inexpensive. For example its price on tokopedia.com in ndonesia today is more or less Rp 8 cent in USD per piece.

3. Method and Materials

Method applied and the material involved in this work are described in the following sub sections. 3.1. Method The work has two goals: a to be confirmed that the A G diode is a suitable voltage dropper for the simple voltage adapter module required, and b to have the module developed and ready to use. Therefore the whole work will consist of: i recognizing the client’s requirement, ii learning and elaborating the A G’s relevant properties, iii obtaining actual diode’s property values data through measurements, iv if actual data supports the hypothesis, then proceed with module design and development, and v testing the module. 3.2. Materials The main component is the A G power diode. f the actual measurements on this diode resulted in a confirmation on the hypothesis, the following components would be required to proceed with module development: resistors, fuses, switches, input terminals, main output terminals and a USB output socket. Measurements for both the diode and the module will be carried out using a digital ampere meter and voltmeter.

4. Determining Device Specifications

The client determined how the eCar would work and look, including what devices to be operating in the car. The researcher designer then translates it into the device specifications for the Voltage Adapter Module in this regards. 4.1. Load Current Planning Because the new module will be placed in the same eCar, with the same load situation, the previous load current planning applies. This is here re‐shown by Table . 4.2. Module Main Specifications n our previous work the module was to be connected to the two poles of the battery bank 8V . owever for this work a different approach is taken. Considering that the voltage dropping by the diodes will cause energy loss, the input voltage needs to be brought as low as possible; of course still it has to be higher than the intended output voltage. t is an advantage that the battery bank has a number of terminals as it consists of six 8‐volt batteries that it can actually serve several voltage values: 8, , , , 223 and 8 volt. Thus, it is decided to supply the module with volt as it will cause least energy loss while it is still higher than the intended output voltage V . The output voltage of the module is to be V, as required by the loads: LED lamps and door openers, GPS device, tablet PC, and mobile phone. The Voltage Adapter Module here developed will provide the same voltage V for those as mentioned gadgets through a standard cigarette lighter socket. t means that the gadgets will require their standard V V converters. n other words the Voltage Adapter Module is here to be designed based on the same load current planning as the one used in the previous work. t means that the module has to provide up to A continuous current at V. Table shows this specifications. 4.3. Fuse Specifications The input current fuse is therefore specified at A. The total capacity of the output fuse should ideally equal A. owever as the output line is split into lines . A for LED lamps, . A for door openers, . A for cigarette lighter , . A for cigarette lighter and another . A for cigarette lighter , there should be a practical approach for the situation. Considering also common availability in the market it is decided to use A, A, A, A, A fuses for the as mentioned lines subsequently. This specifications is shown by Table . Table . The load current planning, the same as the one documented in Nasucha , applies. Load Charger Rated Output Power Max. Current at V All LED lamps 8W at V 8W V = , A Door openers 8W at V 8W V = , A Cigarette lighter GPS or mobile phone charger W at . V w . V = . A Cigarette lighter Tablet PC charger W at . V w . V = . A Cigarette lighter Mobile phone charger W at . V w . V = . A Total current: . A Table . The Module Main Specifications nput Output Vin = V Vout = V; out = A max Table . Fuse Specifications nput Fuse Output Fuses nput Fuse: A Output Fuse : A Output Fuse : A Output Fuse : A Output Fuse : A Output Fuse : A

5. The 6A05G’s Relevant Properties

Research works on applications of diodes were reported although not specifically addressed their nature of dropping voltage. Application of V‐8A SiC JBS diodes in the motor system was reported in Liu et al. . Whereas characteristics and applications of silicon carbide power devices in power electronics was reported in Kondrath and Kazimierczuk . As mentioned the A G is predicted to be a good choice considering: i that its forward current capacity is suitable for the module requirement, and ii that it is widely