mppt原理图.pdf

发布时间：2022-06-14 发布人：admin 分类：说明书资料大小：1.04M 资料格式：pdf 举报版权申诉

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第1页.png

第1页 / 共18页

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第2页.png

第2页 / 共18页

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第3页.png

第3页 / 共18页

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第4页.png

第4页 / 共18页

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第5页.png

第5页 / 共18页

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第6页.png

第6页 / 共18页

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第7页.png

第7页 / 共18页

a171bee2-0ac2-4a1a-99e6-0d66ee613953.pdf-第8页.png

第8页 / 共18页

文本预览

Lecture 5 ECEN 4517/5517 Experiment 3 Buck converter Battery charge controller Peak power tracker ECEN 4517 1

Due dates Now: Take Quiz 2, on Exp. 2 Next week: Exp. 3 part 2 prelab assignment: MPPT algorithm Late assignments will not be accepted. Due at noon next Tuesday in D2L This week: Finish Exp. 3 part 1! ECEN 4517 2

Exp. 3, Part 1 Demonstrate buck power stage ECEN 4517 3

Heatsinks The power semiconductors generally require heatsinks. Example— from the HUF35371 (our 55 V, 34 mΩ MOSFET) datasheet: Multiply thermal resistance by power loss to ﬁnd temperature rise With no heatsink, the thermal resistance is quite high (62˚C/W) With a 25˚C ambient temperature and no heatsink, this device will reach the rated limit of 175˚C if its power dissipation is Ploss = (175˚C – 25˚C)/(62˚C/W) = 2.4 W A heatsink can lower this temperature rise considerably. The junction-to- case thermal resistance is only 1.6 ˚C/W. For reliability reasons, we like to limit temperature rises to much lower values— perhaps a few tens of ˚C ECEN 4517 4

Heatsinks: Thermal model Thermal equivalent circuit model The parts kit heatsinks: From the graph, 2.4 W of loss causes a 30 ˚C rise, which would make the heatsink operate at 55˚C for a 25˚C ambient. Plus junction-to-case temperature rise of (1.6˚C/W)(2.4 W) = 4˚C ECEN 4517 5

PSPICE simulation Exp. 3 Part 1: open loop Buck converter model i1(t) Ts + v1(t) Ts – 1 2 i2(t) Ts + v2(t) Ts – 3 4 CCM-DCM1 5 d PV + – PV model Battery model • Use your PV model from Exp. 1 • Replace buck converter switches with averaged switch model • CCM-DCM1 and other PSPICE model library elements are linked on course web page ECEN 4517 6

Exp. 3 Part 2 • Implement maximum power point tracking algorithm • Demonstrate on PV cart outside ECEN 4517 17

Sensing the battery current and voltage Exp. 3 Part 2 ECEN 4517 14

分享到：

赞收藏

资料库

mppt原理图.pdf

相关推荐

开发技术

热门标签

最新资料