AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
The ITLDC will achieve natural ZVS with a high output current and the natural ZVS range can be extended by increasing the leakage inductance of the transformer or adding an external inductor in series with the primary winding of the transformer. However, the research works focusing on the ZVS of the four-switch ITLDC are relatively few and these research works are as follows. For example, in, the ZVS is realized with a large load range and reduced circulating loss in, the ZVZCS methods are proposed, and some switches realize zero-current turn-on and other switches realize zero-voltage turn-on. There are many research works focusing on the ZVS of the diode clamping ITLDC. This paper will focus on the zero-voltage switching (ZVS) of the four-switch ITLDC. To achieve high efficiency in an ITLDC, soft switching should be realized. The periodically swapping modulation strategy is proposed in to achieve balanced switch currents. The pulse wide modulation methods are proposed in to achieve perfect voltage balancing results. To ensure the reliability of the ITLDC, the voltages of the input capacitors and the current of switches should be balanced. Many research works focusing on the four-switch ITLDC have been conducted to achieve high efficiency and reliability. A four-switch ITLDC was proposed in, which has the simplest structure. To reduce the voltage stress, the DC/DC converter can be implemented by an isolated three-level DC/DC converter (ITLDC). Usually, DC/DC converters are used in chargers and the input voltage of these DC/DC converters is high. Some AC/DC converters can be used to charge the EVs directly. Usually, these chargers include an AC/DC converter followed by a second-stage DC/DC converter or one-stage DC/DC converter powered by a high-voltage DC bus. The slow chargers are usually installed in community parking sites or located on-board. The fast chargers are usually installed in highway rest areas and city refueling points. The chargers of EVs can be categorized into two classes-slow charging and fast charging. With the characteristics of being environmentally friendly and reducing fuel consumption, electric vehicles (EVs) are becoming popular. The structure and operating principle of the ITLDC with ACACs are introduced and the performance of the proposed TLDC is experimentally verified on a 1.5 kW prototype converter. With the proposed ACACs, the ITLDC can realize ZVS during the whole charging process thus, the efficiency will be high. Thus, the ITLDC can work with the proposed ACACs and the auxiliary currents can be controlled within a suitable value to realize ZVS. During the constant voltage charging stage, the charging current decreases with charging time and the charging current is too small to realize nature ZVS. During the constant current charging stage, the ITLDC realizes nature ZVS and the auxiliary currents are controlled to zero thus, the ACACs do not result in high current stress or bring in additional losses, and the efficiency will be high. The auxiliary currents generated by the ACACs are controllable. With the proposed ACACs, all the main switches achieve zero-voltage turn-on and quasi zero-voltage turn-off, and the auxiliary switches realize zero current turn-on and zero-voltage turn-off thus, the efficiency will be high. This paper presents an active commutation auxiliary circuit (ACAC) for the ITLDC to realize the full load range ZVS. ![]() However, during the constant voltage charging stage, the charging current is small thus, nature ZVS cannot be realized. ![]() During the constant current charging stage, the ITLDC can be designed to realize nature zero voltage switching (ZVS). To learn how to delete and control cookies from your browser pleaseĪnd I'm happy to recommend them for good value and excellent customer service.The isolated three-level DC/DC converter (ITLDC) can be used to charge electric vehicles. (including this one) as explained by Google. This website uses the Google AdSense service which uses cookies to serve advertisements based on your use of websites ![]() This website uses some cookies classed as 'strictly necessary', they are essential for operation of the website and cannot be refused but they do not contain any personal information. No personal information is passed to advertisers. These the advertiser may know that you came from this site and I may be rewarded. This website displays advertisements, if you click on Used only to respond to your message, it will not be given to anyone else. If you send an email your email address and any personal information will be This website does not collect personal information.
0 Comments
Read More
Leave a Reply. |