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Safe power utilization device

A technology of safe electricity use and safe electricity, applied in the field of electric power, can solve problems such as bad user experience and easy tripping

Inactive Publication Date: 2021-08-24
湖南一二三智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this kind of safe electrical device is prone to tripping in some occasions with large load changes, which gives users who have high requirements for power supply continuity a bad experience.

Method used

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Embodiment Construction

[0026] The core of this application is to provide a safe power consumption device, which can have a certain overload capacity without affecting the life of the equipment and ensuring the safety of power supply, so as to ensure the continuity of power supply and improve user experience.

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0028] figure 1 A circuit diagram of a safe electrical device provided in the embodiment of the present application; figure 2 It is a control flow chart of a controller of a safety electrical devi...

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Abstract

The invention discloses a safe power utilization device, and the device comprises an isolation transformer composed of a commercial power side coil, a safe power side coil and a triangular winding; a first switch is arranged on a loop where the commercial power side coil is located, a second switch is arranged on a loop where the safe power side coil is located, and a third switch is arranged on a commercial power output circuit. A triangular winding is used for eliminating 3k-order harmonics so as to realize live switching. When the controller detects that the current value of at least one phase in the three-phase alternating current is larger than a first threshold value and the current value of each phase is smaller than a second threshold value (the second threshold value is larger than the first threshold value determined by the rated load of the isolation transformer and larger than the rated load), the state of power supply by the first switch and the second switch is switched into the overload emergency power supply state of direct power supply by the third switch, so the safe power utilization device can keep power supply under the condition of bearing a load exceeding a rated value of the safe power utilization device, devices of the safe power utilization device cannot be damaged, the power supply continuity is ensured, and the user experience is improved.

Description

technical field [0001] The present application relates to the technical field of electric power, in particular to a safe electric device. Background technique [0002] Most of the most widely used low-voltage power supply systems are directly grounded neutral point systems, commonly known as mains. Because of the short-circuit channel formed between the neutral point and the ground of the mains, when a certain phase live wire is grounded, a current path is formed between the phase live wire and the neutral wire. If the ground is a metallic ground, 5 ~10 times the rated current and above short-circuit current, commonly known as short-circuit "blowout", if the grounding point is a non-metallic short-circuit, it will generate an interval short-circuit current greater than 1A, causing fire accidents such as cable burning, if the grounding point is a human body It will generate more than 100~500mA electric shock current, if it is not removed in time, it will cause electric shock...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02H3/08H02H3/32H02H3/04H02J3/01H02J13/00
CPCH02H3/04H02H3/08H02H3/32H02J3/01H02J3/001H02J3/0073H02J13/00001H02J13/00026H02J13/0004Y02B70/30Y02E40/40Y02E60/00Y04S20/242Y04S40/126
Inventor 龙跃潮
Owner 湖南一二三智能科技有限公司
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