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聯(lián)系人：鄭阿清
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For non-resonant inverters, a soft-switching converter is used as a means of controlling the slow changes in voltage and current at the beginning of the rise. As switching elements, bipolar transistors are commonly used, but more recently, insulating gate bipolar junction transistor and Power Metal Oxide Semiconductor field effect transistors (mosfets) have been widely used in small and medium power ranges. In the high power range, the THYRISTOR (GTO) element is used to turn off the gate. IGBT is a voltage control element, than the current control of the Bipolar Junction Transistor Input Control Circuit is simple, high voltage, low on-voltage, switching speed components. Because of the simplicity of the control loop, IPM (intelligent power module) , which encapsulates the power element, drive loop and protection loop,
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8、螳螂
螳螂哥，螳螂哥， 肚兒大，吃得多。 飛飛能把粉蝶捕， 跳跳能把蝗蟲捉。 兩把大刀舞起來， 一只害蟲不放過。
9、大蜻蜓
大蜻蜓，綠眼睛， 一對(duì)眼睛亮晶晶， 飛一飛，停一停， 飛來飛去捉蚊蠅。
10、小鴨子
小鴨子，一身黃， 扁扁嘴巴紅腳掌。 嘎嘎嘎嘎高聲唱， 一搖一擺下池塘。
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