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To obtain the Micro-arc oxidation (MAO) process load characteristics, realize the online measurement, Micro-arc oxidation load characteristics online measurement system is designed by frequency response technology in this paper. Sine wave voltage excitation whose mode is frequency sweeping, series operation with micro-arc oxidation DC source. The amplitude and phase angle frequency response characteristics...
Electro-geometric (EGM) model is now the most popular method for the shielding failure flash-over rate (SFFOR) calculation. In this paper, the Lightning protection theory of the negative angle protective pin is studied on basis of this method, and Installing the negative angle protective pin on the hillside or the peak of the 35 kV transmission line in order to reduce the ground shielding failure...
The design of Si/SiGe HBT for high-frequency microwave power amplification was presented in this paper. The material profile structure of the device was designed. A comb liked structure with 6-fingered emitter was employed for the SiGe HBT. Then the device was fabricated by using the buried metal self-aligned double mesa process and high resistivity substrate in a 3 ??m manufacture process line. The...
According to microarc oxidation characteristics and energy saving requirements, a square wave pulse current supply with positive lossy snubber was designed in this paper. The supply exhibits the following advantages: (a) The main circuit uses a kind of unit-parallel structures, so it can gain higher output current amplitude which can be adjusted to load variety. (b) Inductance components were used...
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