Current Sensor With Compensation Winding for Multi-Parameter Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lightning arresters in power grid systems can only monitor one parameter, requiring multiple sensors that increase size, weight, power consumption, and lead to measurement errors and lower accuracy when multiple signal parameters need to be monitored.
Innovation Solution
A current sensor with a main core, auxiliary core, primary and secondary windings, and a compensation winding, along with a compensation circuit that includes preamplifier, phase shift, and compensation current generation circuits, to detect multiple signal parameters simultaneously and reduce excitation current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensors are connected to monitor multiple signal parameters, then the monitoring capability is improved, but the size, weight, and power consumption increase
Solution Approach 1:
The patent combines multiple sensing functions into a single current sensor by integrating a main core with multiple windings (primary, secondary, detection, and compensation windings). This merging approach allows the sensor to monitor multiple signal parameters simultaneously while avoiding the need to connect multiple separate sensors, thereby preventing increases in size, weight, and power consumption.
Solution Approach 2:
The current sensor is designed as a multi-functional device that can monitor multiple signal parameters including current magnitude, phase, and other electrical characteristics through its multiple windings and cores. This universal design enables a single sensor to perform the functions of multiple specialized sensors, improving adaptability without adding weight.
2Adaptability or versatility
If multiple sensors are connected to monitor multiple signal parameters, then the monitoring capability is improved, but the measurement accuracy deteriorates due to greater measurement errors
Solution Approach 1:
By merging multiple sensing functions into a single integrated sensor with multiple windings on shared cores, the patent eliminates measurement errors that would arise from connecting multiple separate sensors. The integrated design ensures consistent measurement references and reduces cumulative errors, thereby maintaining high measurement accuracy while enabling multi-parameter monitoring.
Solution Approach 2:
The patent incorporates a compensation winding and compensation circuit that uses feedback mechanisms to detect and correct measurement errors in real-time. The compensation circuit monitors the output signals and adjusts the measurement readings to compensate for errors, thereby maintaining high measurement accuracy across multiple monitored parameters.
3Adaptability or versatility
If multiple sensors are connected to monitor multiple signal parameters, then the monitoring capability is improved, but the power consumption increases
Solution Approach 1:
The patent merges multiple sensing functions into a single current sensor that shares common magnetic cores and windings. This integrated approach allows multiple signal parameters to be monitored using a single power supply and signal source, thereby reducing the total power consumption compared to operating multiple independent sensors simultaneously.
4Measurement precision
If a compensation winding and compensation circuit are added to reduce excitation current, then the measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The compensation winding is integrated into the existing magnetic core structure and shared with the primary, secondary, and detection windings. This merging approach allows the compensation function to be added without requiring separate magnetic paths or additional independent circuit boards, thereby limiting the increase in device complexity while achieving improved measurement accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables simultaneous detection of multiple signal parameters with reduced measurement errors and improved accuracy by generating a reverse excitation electromotive force to minimize excitation current.
Implementation Method 1
acquire an alternating current (AC) signal induced by the detection winding
Implementation Method 2
apply a current signal to the compensation winding based on the AC signal to make the compensation winding generate a reverse excitation electromotive force to reduce an excitation current in the current sensor
Data Source
AI summary
Provided are a current sensor and a control method thereof. The current sensor includes a main core and an auxiliary core; a primary winding disposed on the main core and the auxiliary core; a secondary winding disposed on the main core and the auxiliary core; a compensation winding disposed on the auxiliary core; a detection winding disposed on the main core; and a compensation circuit configured to acquire an alternating current (AC) signal induced by the detection winding and apply a current signal to the compensation winding based on the AC signal to make the compensation winding generate a reverse excitation electromotive force to reduce an excitation current in the current sensor.