Electric Insulation Monitoring With Independent Voltage Verification
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Solution Overview
Problem
Existing electric insulation monitoring systems in electrically operated vehicles require time-consuming external calibration and verification of insulation resistance, which compromises safety and service efficiency.
Innovation Solution
An electric insulation monitoring arrangement with a primary and secondary measuring unit, where the secondary unit independently verifies the insulation resistance measurements, eliminating the need for external devices and reducing interference risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external insulation monitoring device is connected to verify insulation resistance, then measurement reliability is improved, but service time increases
Solution Approach 1:
The vehicle's existing insulation monitoring device performs self-verification by utilizing the vehicle's own electrical system components (conductors, ground connection) as measurement resources. The control unit executes verification routines using the already-connected insulation monitoring device, eliminating the need for external devices and reducing service time while maintaining measurement reliability.
Solution Approach 2:
The insulation monitoring device is designed to perform multiple functions: continuous insulation monitoring during operation and verification measurement during service. The same hardware infrastructure (measuring units, conductors, ground connection) serves both operational safety monitoring and service verification purposes, eliminating the need for separate external verification equipment.
2Measurement precision
If an external insulation monitoring device is used for verification, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The system uses its own insulation monitoring device and existing electrical infrastructure to perform verification measurements, eliminating the need for external verification equipment. The control unit manages the verification process by configuring the existing measuring units to perform measurement routines that verify insulation resistance using the vehicle's own conductors and ground connection.
Solution Approach 2:
The verification measurement function is merged with the existing insulation monitoring device rather than using a separate external device. The same measuring units, conductors, and ground connections used for continuous monitoring are also used for verification measurements, combining multiple functions into a single integrated system.
3Reliability
If multiple independent measuring devices are deployed, then measurement reliability is improved, but ease of operation worsens
Solution Approach 1:
The insulation monitoring device performs self-verification using the vehicle's existing electrical system as measurement resources. The control unit automatically executes verification routines without requiring external devices or complex calibration procedures, simplifying the service process while maintaining measurement reliability through internal consistency checks.
Solution Approach 2:
The system incorporates feedback mechanisms where the control unit evaluates measurement results from the insulation monitoring device and determines whether verification is needed. The verification process provides feedback on the reliability of insulation measurements, and the system automatically adjusts its operation based on these results, eliminating the need for manual external verification.
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
Enhances safety and reduces service time by providing robust insulation monitoring without the need for additional equipment calibration, ensuring accurate and reliable insulation resistance verification.
Implementation Method 1
monitor a first voltage between the first conductor and ground, and a second voltage between the second conductor and ground, the insulation monitoring device being configured to determine an electric insulation of the electric system based on measurement data relating to the first voltage and the second voltage
Implementation Method 2
the at least one secondary measuring unit is configured to monitor the first voltage and the second voltage with respect to ground, wherein the at least one secondary measuring unit is provided separately from the insulation monitoring device
Data Source
AI summary
An electric insulation monitoring arrangement (10) for monitoring electric insulation in an electric system (2), in particular of a vehicle, comprising a first conductor (11) and a second conductor (12), the electric insulation monitoring arrangement comprising:an insulation monitoring device (15) comprising a primary measuring unit (13) configured to monitor a first voltage (V1) between the first conductor and ground, and a second voltage (V2) between the second conductor and ground, the insulation monitoring device being configured to determine an electric insulation of the electric system based on measurement data from the primary measuring unit,at least one secondary measuring unit (14) configured to monitor the first voltage and the second voltage with respect to ground, wherein the at least one secondary measuring unit is provided separately from the insulation monitoring device.The insulation monitoring device is configured to use measurement data relating to the first voltage and the second voltage received from the at least one secondary measuring unit to verify the determined electric insulation.