屏蔽变压器
1.Principle and Connection Scheme of Self-Coupled Compensating and Suppressing Harmonic Converter Transformers
2.3-D leakage magnetic field model of high-speed electric locomotive main transformer tank is built using edge element method and accurate tank loss is calculated compared with 2-D analysis model. Result shows 3-D model is more accurate and eddy density distribution pattern provides intuitionistic help for taking better shielding measures.
3.By analyzing systematically the production principle of the common mode noise which is the major factor affecting quality of the switch mode power supply,the decision is reached that the common mode noise is walking through coupling earth capacitance transmitting output, and then a practicable measure of restraining noise is put forward:screens are added between major switch tube and radiation, between transformer primaries and transformer script,or FRD can be selected with R C absorb network.
