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A Simulation Method of Closed-loop Hall Effect Current Sensor

A current sensor, closed-loop Hall technology, applied in instruments, measuring electrical variables, measuring devices, etc., can solve problems such as the inability to analyze and optimize the structure of the magnetic core, and achieve the effect of easy convergence and few unknowns

Active Publication Date: 2021-03-26
NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

It is difficult to obtain the cloud map of magnetic field distribution and accurate calculation results by rough analysis of the magnetic circuit. As an important part of the closed-loop Hall effect current sensor, the magnetic core is the key optimization design object of the closed-loop Hall effect current sensor. This method cannot structure analysis optimization

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  • A Simulation Method of Closed-loop Hall Effect Current Sensor
  • A Simulation Method of Closed-loop Hall Effect Current Sensor
  • A Simulation Method of Closed-loop Hall Effect Current Sensor

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0047] Such as figure 1 As shown, the magnetic flux generated by the measured current Ip gathers in the magnetic circuit and is detected by the Hall element at its air gap. The output voltage signal of the Hall element is processed, and a standard voltage signal is output at the sensor output terminal, which accurately reflects the primary current. The magnetic flux generated by the measured current Ip is balanced with the magnetic flux flow generated by the feedback current Is generated by the amplified Hall voltage through the feedback coil. The feedback current Is accurately reflects the measured current. In practice, there are various core structures and winding methods, not limited to figure 1 .

[0048] The closed-loop Hall effect current sensor simulation method in this embodiment includes the following steps:

[0049] S1. Calculat...

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Abstract

The invention relates to a closed loop Hall effect current sensor simulation method. The correlated matrix coefficients of closed-loop Hall-effect sensors such as structure matrixes C, K, D and a gradient matrix G are calculated, magnetic core circuit models of the closed-loop Hall-effect current sensors are established, core network table files of the closed-loop Hall-effect current sensors are obtained, circuit network table files of closed-loop Hall effect current sensors are generated through line network table converters, the core network table files and circuit network table files of closed-loop Hall effect current sensors are input into HSPICE software, and the closed-loop Hall effect current sensors are subjected to simulated analysis. The closed loop Hall effect current sensor simulation method can more accurately reflect the influence of factors such as magnetic core structures and air gap positions, the unknown quantity is little, and the simulation process is easily converged.

Description

technical field [0001] The invention relates to the technical field of current sensors, in particular to a Hall effect current sensor simulation method. Background technique [0002] A large number of closed-loop Hall effect current sensors are required in the field of rail transit detection. The closed-loop Hall effect current sensor mainly includes two parts: a magnetic core and a circuit. The signal generated by the magnetic core is used as the input of the circuit, and the output of the circuit is fed back to the input of the magnetic core. The two parts interact. Even in the absence of interference, the sensor will have chaotic ripples and large differences between input and output when it is working. To better design the Hall-effect current sensor, it is necessary to simulate the closed-loop Hall-effect current sensor. This requires simulating the circuit and core as a whole, since their circuit and core interact. [0003] In the prior art, Maxwell software and Simp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 李菊萍吕阳郑良广赵呈锐侯晓伟
Owner NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
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