厦门彬硕自动化 特价西门子 3TK 3UG 3RP 3RS 3RK 3TX 3RV 3RT 3RK 6GK 6EP 6SY 6RY 6DD 6SE70 6SB 6SL
PILZ Balluff bender SQUARE-D TURCK IFM ITE-SIENEMS Schneider继电器
同时提供欧美进口品牌的采购服务，直接从厂家采购。
主要行业:钢铁厂、石化厂、铝业厂、电厂、石油等行业进口电气元件备件采购的供应。
西门子（SIEMENS）3C认证正品，厦门彬硕自动化科技有限公司为您提供原装德国西门子（SIEMENS）低压电器，变频器，仪器仪表，电工设备，自动化配件等，因行业型号繁多，请来电咨询或者加Q联系。
DC/DC变换是将可变的直流电压变换成固定的直流电压，也称为直流斩波。斩波器的工作方式有两种，一是脉宽调制方式Ts不变，改变ton(通用)，二是频率调制（
（1）Buck电路——降压斩波器，其输出平均电压U0小于输入电压Ui，极性相同。
（2）Boost电路——升压斩波器，其输出平均电压U0大于输入电压Ui，极性相同。
（3）Buck－Boost电路——降压或升压斩波器，其输出平均电压U0大于或小于输入电压Ui，极性相反，电感传输。
（4）Cuk电路——降压或升压斩波器，其输出平均电压U0大于或小于输入电压Ui，极性相反，电容传输。还有Sepic、Zeta电路。
上述为非隔离型DC-DC变换器电路，隔离型DC-DC变换器有正激电路、反激电路、半桥电路、全桥电路、推挽电路。
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