UPS supply device

Abstract

The provided UPS device with low power consumption comprises: an input circuit coupling between the voltage inlet and rectifier circuit, a boost-up inductor at the input circuit being charged by ac current to supply rectifier circuit with the ac voltage, and an inverter conversing the transient dc voltage from the rectifier into multi-phase ac voltage for the load.

Description

technical field [0001] The present invention relates to an uninterruptible power supply (UPS), in particular to an uninterruptible power supply with low cost and low power consumption. Background technique [0002] For various electronic devices, a clean and uninterrupted power supply is the basic condition to maintain their normal operation. In order to avoid the erroneous operation of electronic devices caused by the interruption or abnormality of the AC power supplied by the mains power supply, an uninterruptible power supply (UPS) has been developed to provide a backup when the input AC power of the electronic device cannot supply power normally. Power supply to maintain the operation of electronic devices. [0003] FIG. 1 shows a schematic circuit diagram of a known on-line uninterruptible power supply device, wherein the input AC voltage Vin is provided by a public power supply or a commercial power supply. As shown in Figure 1, a conventional on-line uninterruptible...

AI Technical Summary

Problems solved by technology

Since the boost inductors L11 and L22 are magnetic components, a considerable power loss will be caused, thereby reducing the conversion efficiency of the boost rectifier circuit 120.

Furthermore, since a current monitor composed of semiconductor elements needs to be installed on each bus to measure the output current of the bus 10a, 10b respectively, it will cause the problem of increased manufacturing cost.

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