Alternating and direct current isolation control method of uninterruptible power supply and circuit
A control method and technology for controlling circuits, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of incomplete isolation, magnetic leakage, high cost, and prevent transformer saturation, no-load loss reduction, and mutual interference. the effect of eliminating
Active Publication Date: 2014-04-23
AVIC TECH XIAMEN ELECTRIC POWER TECH CO LTD
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Problems solved by technology
Although this uninterruptible power supply (UPS) AC and DC isolation method can well realize the electrical isolation of the AC input and the DC terminal, it needs to consume more hardware resources, and its control circuit is complicated, which increases the production cost of the uninterruptible power supply hardware. , and the electronic components are bulky, very costly, inconvenient to transport, and the cost performance is poor when the power is 3-10KW
In addition, the service life of the isolation transformer components is limited, and the isolation may be incomplete due to magnetic leakage after long-term use
Method used
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[0050] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0051] refer to figure 1As shown, the AC-DC isolation control method of the uninterruptible power supply of the present invention is applied to the electrical isolation of the uninterruptible power supply of the dual-channel input inverter circuit of the AC input channel and the DC input channel. The method is:
[0052] An electronic switching element 108, 109, 110 is respectively inserted into the total channel before the AC input channel 101, the DC input channel 102 and the input DC / AC inverter circuit module 107, and the electronic switching elements 108, 109, 110 are all Whether it is turned on or not is controlled by the AC / DC detection control circuit 105 .
[0053] Preferably, the DC electronic switching element 108 is a DC relay, the AC electronic switching element 109 is an AC relay, and the slow charging electronic switching element 110 i...
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The invention relates to the technical field of power supplies, in particular to the technical field of alternating and direct current isolation of an uninterruptible power supply. An alternating and direct current isolation control method of the uninterruptible power supply is characterized in that electronic switch elements are connected in an alternating current input channel, a direct current input channel and an overall channel in front of an input DC / AC inverter circuit module, and the electronic switch elements are all controlled to be switched on or switched off by an alternating and direct current detecting control circuit. An alternating and direct current isolation control circuit of the uninterruptible power supply is characterized in that control poles of the three electronic switch elements are connected with a driving control circuit at the output port of an MCU controller; the alternating current input channel is connected with an alternating current voltage amplitude acquiring unit and an alternating current frequency acquiring unit of an alternating current detection network circuit; the direct current input channel is connected with a direct current voltage amplitude acquiring unit of a direct current detection network circuit; and the acquired direct current voltage amplitude is input to a detection port of the MCU controller.
Description
technical field [0001] The invention relates to the technical field of power supplies, in particular to the technical field of AC and DC isolation of uninterruptible power supplies. Background technique [0002] The 110V / 220V DC systems in power plants and substations and the 48V DC systems in communication rooms all strictly require electrical isolation between the AC input and the DC terminal to ensure power supply safety. The traditional AC and DC isolation methods of uninterruptible power supply (UPS) generally use AC plus isolation transformer and DC / DC isolation conversion of DC. The use of AC plus isolation transformer technology is to use the magnetic field of the AC transformer to realize the isolation of AC power, and the DC / DC converter module of DC to realize DC electric isolation. Although this uninterruptible power supply (UPS) AC and DC isolation method can well realize the electrical isolation of the AC input and the DC terminal, it needs to consume more har...
Claims
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IPC IPC(8): H02J9/06
Inventor 巫良生陈文全林火土林东权
Owner AVIC TECH XIAMEN ELECTRIC POWER TECH CO LTD