Motor Control Monitoring Architecture for Independent Fault Shutdown
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Solution Overview
Problem
Current motor control systems lack adequate safety and reliability, leading to ineffective handling of unexpected faults.
Innovation Solution
A motor control system comprising a master control module, a drive module, and a monitoring module, with independent power supplies and multi-layer monitoring processing, to enhance safety and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single integrated control system is used for motor control, then device complexity is reduced and ease of operation is improved, but safety and reliability deteriorate due to inability to detect unexpected faults
Solution Approach 1:
The control system is segmented into a master control module and an independent monitoring module. The master control module handles normal motor control operations, while the monitoring module independently monitors the drive signals and control signals for abnormalities. This segmentation allows the system to maintain simplicity for normal operations while adding targeted safety monitoring capabilities.
Solution Approach 2:
The monitoring module acts as an intermediary safety layer between the master control module and the drive module. It receives copies of drive signals and control signals, independently analyzes them for abnormalities, and can trigger protective actions without interfering with normal master control operations. This intermediary structure enhances reliability without requiring complete system redesign.
2Reliability
If the monitoring module shares the same power supply as the master control module, then device complexity is reduced, but reliability deteriorates because the monitoring module cannot function independently during power supply faults
Solution Approach 1:
The power supply system is segmented into a main power supply for the master control module and an auxiliary power supply for the monitoring module. This segmentation ensures that the monitoring module has an independent power source, allowing it to continue functioning and detecting faults even when the main power supply fails or becomes abnormal.
Solution Approach 2:
The auxiliary power supply is prepared in advance specifically for the monitoring module's independent operation. This preliminary power supply arrangement ensures that when faults occur in the main power system, the monitoring module already has the necessary power to detect and respond to abnormalities without waiting for power restoration or alternative arrangements.
3Reliability
If multi-layer monitoring and independent power supplies are implemented, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
Instead of making the entire system complex, the patent applies monitoring and independent power supply only to critical components - the master control module and monitoring module. Other parts of the system maintain their original simple structures. This localized application of enhanced safety features improves reliability where needed without unnecessarily complicating the entire system.
Data Source
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AI summary
A motor control system and a motor control device are provided. The system includes a master control module, a drive module, and a monitoring module. The master control module is configured to output a low-voltage drive signal to the drive module, the drive module converts the low-voltage drive signal into a high-voltage drive signal and outputs the high-voltage drive signal to a power unit, and the power unit outputs, according to the high-voltage drive signal, a power supply drive signal provided by a high-voltage battery. The monitoring module is electrically connected with the master control module and the drive module, and is configured to acquire the low-voltage drive signal, and output a fault signal to the master control module when the low-voltage drive signal is abnormal, to control the master control module to stop outputting the low-voltage drive signal. The monitoring module includes at least an auxiliary power supply, and the auxiliary power supply is independent of the master control module and provides a working power supply for the monitoring module.