Title:
METHOD FOR ESTABLISHING NONLINEAR SEGMENTED TIME SEQUENCE MODEL OF HIGH-FREQUENCY DYNAMIC LOSS OF GAN HEMT DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/211326
Kind Code:
A1
Abstract:
Disclosed is a method for establishing a nonlinear segmented time sequence model of a high-frequency dynamic loss, applicable to a GaN HEMT device. According to electrical parameter states of different time periods in a switching-on/switching-off process of the device, a loss is specifically calculated in four stages of switching-on, switching-off, switching-on conversion and switching-off conversion. During a modeling process, the problem of a dynamic impedance increasing under the specific high-frequency working of the device is taken into consideration, and accurate extraction of parameters influencing a change in a dynamic conduction impedance during the high-frequency working of the device is realized by means of building a circuit; and during the modeling process, in the present invention, a method of replacing a device output capacitance with a gate charge to directly calculate a loss is used, such that complex and inaccurate calculation caused by a capacitance value changing along with a voltage is prevented. In addition, an external capacitor is connected in parallel between a drain electrode and a source electrode outside the device for the first time in the present invention to compare the difference between a drain electrode current of the device and an actual channel current, and the specific source generating the difference and the real influence on a switching-on/switching-off loss are analyzed, such that correction of the loss calculation of the model is realized.
Inventors:
CHEN DUNJUN (CN)
WANG RUI (CN)
LEI JIANMING (CN)
ZHANG RONG (CN)
ZHENG YOULIAO (CN)
WANG RUI (CN)
LEI JIANMING (CN)
ZHANG RONG (CN)
ZHENG YOULIAO (CN)
Application Number:
PCT/CN2019/114217
Publication Date:
October 22, 2020
Filing Date:
October 30, 2019
Export Citation:
Assignee:
UNIV NANJING (CN)
International Classes:
G06F17/50
Foreign References:
| CN109918857A | 2019-06-21 | |||
| CN107861042A | 2018-03-30 | |||
| CN106372357A | 2017-02-01 |
Attorney, Agent or Firm:
JIANGSU PHAEDO LAW FIRM (CN)
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