二零二三年 优质公开课Switchpowersupplydesign.pptx

Design and budget of mobile communication engineeringSwitch power supply designCourse team: Xiaoji Zhao Xuelian Fang Yueqiu Dong Liu Yang SHENZHEN POLYTECHNIC Contents 1Status of switch power supply design 2Theory foundation of rectifier module design 3Example of rectifier module design 1. Status of switch power supply designPower consumption statistics of base station equipment P=UICalculation and selection of battery capacity SwitchCapacity calculation and selection of switch power supply rectifier module220vCapacity calculation and selection of AC distribution box Capacity calculation and selection of transformerCapacity calculation and selection of Diesel generatorPower line configuration oilwire Electric supplyAC modulerectifier Diesel generator BATT 1 BATT 2Mobile communication equipment Other DC equipment1. Power consumption statistics—load current I2 Battery configuration capacity—charging current Ic3 .Rated output current of each rectifier Ime4 .Calculating n，configuration redundancyIIc Capacity calculation and selection of the rectifier module : mainly based on the rated output current Ik : Ik≥I+Ic I : Maximum load current of DC equipment;Ic : Battery charging current；If it is 10 hours equalizing charge and better power station：Ic=（0.1~0.15）*QSelect the number of rectifier modules（n）：n+1（＜10）； Redundancy principle。When the number is greater than 10,every 10 must be redundant； n≥Ik/ImeIme ：Rated output current of each rectifier，usually 30A。2. Theory foundation of rectifier module designDC module DC load and equalizing charge total power Current Recent Current Recent Specialty Load Load Voltage -48V-48V（A）（A）（V）(KW)(KW)Actual demand for equipment electricity 1341669-481632Equalizing charge200.0200.0-4810.010.0Actual demand 254186927431. Power consumption statistics—— I=669A2 Battery configuration capacity— Ic=200A3 . Rated output current of each rectifier