-48V direct current single system double-power-source device and power output control method

Abstract

The invention provides a -48V direct current single system double-power-source device. The -48V direct current single system double-power-source device has the advantages that first, the -48V direct current single system double-power-source device has the same capacity of supplying electric power to communication equipment as a traditional communication power source. Double power sources in a single system can simultaneously supply electric power for loads and also can disconnect any way of power output, the -48V direct current single system double-power-source device can be used as a single system single power source power supply unit, the output capability of two rectifier screens is not limited and can completely support the loads of clients. Second, in the process of using the double power sources of the single system, the output currents of the double power sources are respectively detected and calculated, the output voltage of each way of power source is automatically adjusted through software according to the sizes of the output currents, the purposes of adjusting and outputting the voltage difference between ends of a diode are achieved, therefore current sharing between the two ways of power sources is achieved, after current sharing of the diode is achieved, the maximum current sharing error between the two ways of power sources can not be more than 10%, and the demand on balance of the load rate between systems can be well met.

Description

technical field [0001] The invention relates to a power supply device, in particular to a -48V DC single-system dual power supply device and a power output control method used in the communication field. Background technique [0002] The communication power supply system is used to provide power guarantee for communication equipment. In the commonly used single power supply dual power supply or dual power supply dual power supply mode, the dual power supply usually has two usage modes. One mode is that the two power supplies are used as backup for each other: when the first power supply is working normally, the second one turns off the output. When the first circuit breaks down, turn on the second backup power supply to start working. In this mode, there are generally two situations that need to be considered: First, when the first power supply fails and is switched to the second power supply, because the second power supply system has no hot backup, it will appear when the...

AI Technical Summary

Problems solved by technology

Since the two power supplies are controlled by their own monitoring units, even if the system output parameters are set to be the same, due to the error of the detection circuit, the output voltage of the two power supply systems is difficult to be consistent, which will lead to inconsistent output currents of the two power supply systems , uneven current between power systems, and significant differences in load rates

And when the output of the first power supply is short-circuited, since the output ends of the two power supply systems are directly connected in parallel, it will also cause the protection of the second output, resulting in interruption of the input power of the communication equipment

[0004] Secondly, when working with a dual power supply system, since the monitoring units are independent of each other, the parameters of the power supply system need to be corrected at the same time during the maintenance process, and there are many steps in the maintenance work, which is prone to errors

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