A self-powered distributed wireless current sensor
A current sensor, distributed technology, applied in current collectors, battery circuit devices, instruments, etc., can solve the problem of current sensors occupying extra space for separate power supply, and achieve the effects of saving wiring space, wide application range, and compact structure
Active Publication Date: 2018-07-24
WUHAN XINGHUI ELECTRIC POWER TECH CO LTD
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[0004] The invention provides a self-powered distributed wireless current sensor, which can overcome the defects of existing current sensors that occupy extra space and supply power alone, and realize functions such as self-power supply, wireless transmission, and measurement of multi-phase circuit current.
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[0044]
[0045] Where f is the operating frequency of the input signal, N 2 is the number of turns on the secondary side of the induction coil, μ is the magnetic permeability of the magnetic core, S is the effective cross-sectional area of the magnetic core of the induction coil, I μ is the magnetizing current of the induction coil, and l is the length of the magnetic circuit. That is, the voltage obtained by the energy-taking coil 4 is related to the above factors.
[0046] When the obtained power is not enough to drive other components to work, the power management circuit will store and release energy. According to the selected Hall element 2 and other power-consuming modules, as long as the magnetic core permeability, effective cross-sectional area and magnetic circuit length are properly adjusted, it is achievable to meet the power requirement under the condition of a certain starting current.
[0047] The energy-taking coil 4 obtains energy and transmits it to the...
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A self-powered distributed wireless current sensor comprises a clamp-shaped housing, a Hall element is arranged at the clamp-shaped opening of the clamp-shaped housing, a magnetic core is arranged in the clamp-shaped housing, and an energy-taking coil is wound on the magnetic core. A control box is arranged under the clamp-shaped housing, and a power management circuit, a signal conditioning circuit, an A / D conversion module, an MCU processor module, and a wireless transceiver module are arranged in the control box. The energy-taking coil is connected to a power management circuit, the power management circuit is connected to a signal conditioning circuit, the signal conditioning circuit is connected to an A / D conversion module, the A / D conversion module is connected to an MCU processor module, and the MCU processor The module is connected with the wireless transceiver module. The wireless transceiver module can realize wireless communication with remote communication equipment. The invention can overcome the defects of extra space occupied by the existing current sensor and separate power supply, and realize functions such as self-power supply, wireless transmission and measurement of multi-phase circuit current. And many-to-one data transfer is possible.
Description
technical field [0001] The invention relates to a current transformer, in particular to a self-powered distributed wireless current sensor. Background technique [0002] With the rapid growth of power demand and the rapid development of the power system, the power industry is facing serious challenges to increase the utilization rate of power equipment, reduce the operating cost of power equipment, and enhance the safe and stable operation of the power system. Most of the faults in the power system will affect the current, so it is very necessary to monitor the current. my country's electric power construction has entered a new stage of high automation and informationization, and the monitoring of current has also entered a new stage. At present, the environment of many industrial fields and power distribution equipment, especially power distribution switchgear, is relatively complex, and problems such as heating and aging of lines caused by excessive current are likely to ...
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IPC IPC(8): G01R19/25H02J7/02G08C17/02
Inventor 黄悦华张迪程江洲袁雪珺曹诗龙
Owner WUHAN XINGHUI ELECTRIC POWER TECH CO LTD