白丝美女被狂躁免费视频网站,500av导航大全精品,yw.193.cnc爆乳尤物未满,97se亚洲综合色区,аⅴ天堂中文在线网官网

Adaptive timing for high frequency inverters

專利號(hào)
US11996767B1
公開日期
2024-05-28
申請(qǐng)人
Apple Inc.(US CA Cupertino)
發(fā)明人
Weihong Qiu; Jun Liu; Jizhen Fu; Zaki Moussaoui
IPC分類
H02M1/08; H02J50/10; H02M1/38; H02M7/5387; H02M7/5395
技術(shù)領(lǐng)域
dead,switching,inverter,voltage,vsw,comparator,time,gate1,gate2,switch
地域: CA CA Cupertino

摘要

A method of adaptively controlling dead time between turn off of a first switching device of an inverter and turn on of a second switching device of the inverter that is a counterpart of the first switching device can include: monitoring a plurality of switching events of at least one of the first and second switching devices, storing for each monitored switching event an indication whether a dead time associated therewith permitted optimal switching, and adaptively controlling the dead time responsive to the stored indications. Monitoring a plurality of switching events of at least one of the first and second switching devices can further include sampling an output voltage of the inverter and comparing the sampled output voltage to one of a high reference voltage corresponding to a high inverter rail voltage and a low reference voltage corresponding to a low inverter rail voltage.

說明書

FIG. 8A illustrates a plot 800a of the inverter output Vsw (851a), the upper switch dead time for each switching cycle (852a), and the lower switch dead time for each switching cycle (853a) when implementing the above-described adaptive dead time control. As can be seen at the beginning both upper and lower switches ay exhibit a relatively long dead time, with such dead time being too long to allow for suitable switching. Over time, an adaptive controller as described above may continually decrease the dead time (852a/853a) until suitable switching is achieved, at which point the dead time values will hold relatively constant (as indicated in the right-hand portion of FIG. 8A). FIG. 8B illustrates plot 800b corresponding to a single switching cycle with a too long dead time, as in the left-hand portion of FIG. 8A. The upper switch dead time 852b and lower switch dead time 853b are shown as constant over the single switching cycle and decremented at the end of the switching cycle because of the non-zero voltage switching transitions indicating by overshoots 841 and 842 of inverter output voltage 851b. FIG. 8C illustrates plot 800c corresponding to an optimal dead time, as in the right-hand portion of FIG. 8A. The upper switch dead time 852c and lower switch dead time 853c are shown as constant over the single switching cycle and do not change at the end of the switching cycle because suitable switching was achieved, as indicated by the absence of overshoots or undershoots in the output voltage waveform 851c.

權(quán)利要求

1
微信群二維碼
意見反饋