DZT高频开关电源整流模块英文说明书

1、DZT4810/4820 High-frequency Switch Power Rectifying Module Instruction ManualGKA2.939.073/074SS Telecommunications Company of Jiangsu Hongtu High-tech Co.,Ltd.1. INTRODUCTIONDZT serial high-frequency switch power rectifying module is a essential communication power of computerized design. There are

2、two types of DZT 4810(output current 10A) and DZT 4820(output current 20A) in DZT high-frequency serial switch power rectifying module. With being based on high-frequency PWM technology (300khz clock), it have the independent shunting and equalizing function and perfect date interface, thereby reali

3、zing the automatic equalizing charge, fault disconnection, remote restriction current and remote control. It is widely used in large programmable exchanges, radio wave, light wave fiber, mobile communication and other equipment, sharing charging-battery. It holds small-volume, light-weight, high-dep

4、endability, well-stability and other features.2. Working principles and main performance specifications2.1 Working principlesThe principle diagram of DZT4810/4820 high-frequency switch power rectifying module is shown as Fig.1. The single phase AC current first enters in the peak suppression and EM1

5、 carrier wave circuit, which has two functions: one is to prevent the peak load caused by the switch on/off of the load and lightening damaging the rectifying module in the commercial power network, the other is to prevent the interference voltage and current caused by the high-frequency switches in

6、side the rectifying module returning to the power network.Fig.1 Principle diagram of DZT4810/4820 high-frequency switch power rectifying moduleThe main control unit carries out the input voltage control, pulse width modulation, output voltage and current control and battery interface control. At the

7、 same time, it transmitted the processed sample values of output voltage and current to the display unit.All technical specifications of DZT4810/4820 high-frequency switch power rectifying module comply with recommendation YD/T731-2002.There is a entrance certification of industry department (Certif

8、icate Number:25-4819-011458).2.2 Main performance specifications1) AC input:Single phase input rated voltage: AC 220V 50HZInput voltage changing range: AC 175V265VInput current: 8A (under DC48V/20A output)Start surge: non-input AC 220V(full load)2) DC output voltage: DC 53.5V/10A20AVoltage adjusting

9、 range: DC 43.2V57.8VOutput current: 10A/20A (DZT4810/4820)3) Charging current: 2.5A/5A (manually set)4) Load adjusting rate: 0.5%(input AC 220V/output DC 48V, load 10%100%)5) Power network adjusting rate: 0.3%(input AC 185255V, output DC 48V/full load)6) Overcurrent protection value: 11A/21A ±

10、1A (DZT4810/4820)7) Temperature coefficient: 0.0002 (ambient 25+55)8) Output noise(differential mode): 50mVp-p (020MHz AC220 full load)9) Output wave(differential mode): 2mV(telephone counterweight noise0.5mV AC220V full load)10)Dynamic response: 200us (25%75% step load)200us (-15%+10% step power ne

11、twork)11) Efficiency: 85% (full load)12)Network overvoltage and undervoltage: AC175V (undervoltage switch off)AC265V (overvoltage switch off)13) Battery undervoltage: DC44V (no commercial power switch off) DC47V (no commercial power resume)14)Working temperature: -25+55 (50% full load when above 40)

12、15)Storage temperature: -55+8516)Volume: 482.6mm * 300mm * 88mm(width depth height)17)Weight: 8kg18)MTBF: 1×105 h2.3 Functions2.3.1 PanelsThe front panel of the high-frequency switch power rectifying module is shown as Fig.2, the rear panel being Fig.2.LED (Working Indicator) LCD Screen ManualE

13、qualizedCharging/FloatingChargingSwitchHV.EqualityChargeAdjustHoleLoadOutputInterfaceLED(BatteryIndicator)LED(BatteryForceSupply Indicator)CommercialPowerInputJackChangingCurrentSetSwitchFunBus InterfaceOutput Voltage Adjust HoleBatteryForceSupplyPowerkeyCommercial Power SwitchOutput Voltage / outpu

14、t Current SwitchBatteryKeyBattery Input FuseDZT4820Battery InterfaceFig.22.3.2 Functions of panels2.3.2.1 DisplayThe display is composed of LCD screen and LED indicator.LCD screen display: output voltage value and output current value.PWR(the front panel working indicator) : indicates the power netw

15、ork. When the power switch is on, this LED lights to indicate power on, and flashes to indicate soft start or network abnormality or output abnormality.BAT(battery working indicator): indicates battery and battery relay close. With the battery correctly wired, switch on the battery, this LED lights

16、when the battery relay closes.FSP(battery forced supply indicator): indicates forced supply(battery protection cancelled). This LED lights when the battery is forced to supply power.2.3.2.2 AnnunciationWhen the battery is undervoltage or the poles are reversed, the internal buzzer gives alarm and th

17、e BAT extinguishes. The battery undervoltage annunciation will stop automatically when the commercial power is normal or the forced power supply button is pressed. When the power network is abnormal(overvoltage or undervoltage), or the output voltage is abnormal (overloaded or short circuit), PWR in

18、dicator will light.Note: refer to the section of network overvoltage and undervoltage, and the section of overload short circuit protection for detailed explanation.2.3.2.3 Operation keyThere are two keys on the front panel of the rectifying module. From the left, they are output voltage/output curr

19、ent key and the commercial power working key.There are three keys on the rear panel of the rectifying module. From the left, they are the manual equalized charging / floating charging switch, FSP (battery forced supply switch), BAT( battery switch).The manual equalized charging / floating charging s

20、witch: When it is on, the rectifying module is under manual equalized charging. When it is off , it is under floating charging.FSP: Battery forced supply switchBAT: Battery switch2.3.2.4 AdjusterThere are potentiometer adjusting hole(OV-ADJ) on the right side of output voltage/output current switch

21、on the panel and 4-digit switch (CC-ADJ) and HV-ADJ at the back of it .OV-ADJ: To adjust the output voltage. Turn right to increase.(refer to technical parameters for range of adjustment)CC-ADJ: Digital switch to set the charging current.(refer to charging current set section)HV-ADJ: To adjust the e

22、qualized charging voltage. Turn right to increase.2.3.2.5 TerminalsThere are two groups terminals at the back of the rectifying module. One is the load output interface , the other is the battery interface.DC48V and BATTERY RED POLE(+): shared by load and batteryDC48V BLACK POLE(-): 48V supply power

23、 pole, connected to the negative of the loadBATTERY BLACK POLE(-): battery pole , connected to the negative of the battery2.3.2.6 Power socketThe power socket is at the back of the equipment (three core). The grounding terminal should be well grounded during operation for safety.2.3.2.7 Safety devic

24、eThere are safety devices at the inlets of the power and the battery (BAT) to ensure safe operation of the system . Especially when there is no safety device at the inlet of the battery, to short circuit its poles is very dangerous.2.3.2.8 Calculation of loadboThe max. output current of the rectifyi

25、ng module is Io(max)(including charging current )At any time: I1 +Ic Io(max) Ic=-IIn which: I1 is load current, Ic is charging current, I0 is rectifying module output current and Ibo is battery discharging current. So: I1 Io(max) + IboThat is to say, when the equipment is connected with the battery,

26、 the current consumed by the load at some time can exceed the max. output current of the rectifying , only that the battery takes part in the load supply at this time (Ic<0). However, to consider from the long run, the total average current of the load should be less than the max. output current

27、of the rectifying module, giving the battery to chance to be charged.2.3.3 protection functions 2.3.3.1 AC overvoltage and undervoltage protection When AC is overvoltage or undervoltage, PWR indicator flashes. At the same time , the mains returning circuit of rectifying module disengages with the co

28、mmercial power network automatically and monitors the commercial power network voltage. When the commercial power network voltage returns to normal, the rectifying module resumes normal operation automatically.2.3.3.2 Output overload and short-circuit protection The mode of the overload protection o

29、f the rectifying module is constant current limiting protection (refer to Fig.3) . It is allowed to run the rectifying module under current limiting status for a long time. This ensures that the rectifying module can realize multi-module parallel operation reliably for a long time without any curren

30、t equalization measures. When the output voltage (overload or short circuit) is less than 60% of the rated voltage for more than 10 sec, the current limiting point will decrease to within 10% of the rated current (shown as dotted line in Fig.3). At the same time, PWR indicator flashes and gives annu

31、nciation. The rectifying module returns back to normal automatically if the load is cut off at this time.V0VoutI0(max)I0Fig.3 Power overload protection area2.3.3.3 Battery undervoltage protectionWhen the battery supplies the power and is undervoltage, BAT indicator distinguishes and the rectifying m

32、odule is under battery undervoltage protection status to prevent damage to the battery. When the power supply is normal, the rectifying module can resume automatically to charge the batteries. When FSP key is pressed, the module will cancel the battery protection and the FSP indicator lights.3 Opera

33、tion 3.1 Startup Connect the power and press PWR switch, the PWR indicator lights. After about 5 sec, the power starts up and the output voltage is established. PWR indicator changes from flash to constant illumination.3.2 Battery connection Set BAT key to OFF position and connect the battery. If th

34、ere is no commercial power or the system is not working , first make the DC48V red pole (+) and DC48V black pole(-) idle in order to allow the buffer circuit to charge the power outlet capacitor fully. If the battery is correctly connected, press BAT until the internal voltage of the power is balanc

35、ed with the external battery voltage and the BAT indicator lights.3.3 battery forced power supply: When the battery voltage is low, if the user does not want the load (carrier wave machine or program-controlled exchanger) to stop working . FSP key should be pressed to cancel the battery protection.

36、Of course, this status should not last long as it can damage the battery.3.4 Battery equalized charge Switch of manual equalized charging / floating charging being on , the rectifying module will keep the original charging current to charge the battery equally. The switch is off after the charging f

37、inishes and the rectifying module will resume the original charging voltage automatically.3.5 Battery off Before press the BAT key to cut off the battery, set the charging current to min. to charge the battery equally. If there is commercial power or the rectifying module is not working , try to mak

38、e the OUT terminals of the rectifying module idle to prevent the are of the high current burning the contacts of the relay.3.6 Output voltage adjustment Adjust with the OV and ADJ on the front panel (turn right to increase).3.7 Equalized charging adjustment Adjust with the HV and ADJ on the rear pan

39、el (turn right to increase). 3.8 Charging current set: This is done by a four-digit switch CCADJ. They are arranged from the lower to the higher from left to right sequentially. There are altogether 16 shifts combined by the four-digit switches. Take the max. charging current(Icm) as the reference,

40、the basic value takes up 25%. From left to right, the current controlled by each shift is 5%, 10%, 20% and 40% respectively. The user can add as required. The adjusting range is 25%100% Icm. Refer to values of parameters for Icm value.3.9 Parallel operation When the rectifying modules are under para

41、llel operation , it can have equalized flow automatically by the bus bars of the interfaces. If one module fails, it can quit automatically. The OV-ADJ of each module can adjust the output voltage independently. For a system composed by N modules, the adjusting range of each module is 1/N. The HV-AD

42、J of rectifying module can adjust the equalized charging voltage of the system, only the system works on the max. setting. In addition, the manual equalized charging switch of any rectifying module can put the whole system into equalized charging status independently.When the rectifying module are w

43、orking in parallel, BATTERY(-) interface of it do not function and have to be connected according to the specified methods for parallel operation. Refer to Fig.4 for detailed wiring . Load DC48V DC48V BATTERY Rectifying Module Battery (a) Wiring diagram of rectifying module working individuallyBus 1 DC48V DC48V BATTERY Battery GroupFu1ModuleFu2Bus线Load DC48V DC48V BATTERY Battery ProtectorKModule Bus 3 10Bus 8Bus 2 9(b) Wiring