Drive Control Method for Motor Interlocking Detection
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Solution Overview
Problem
Existing drive control systems face high costs and reliability issues due to the need for mechanical interlocks and limited DI ports to ensure the interlocking relationship between switches, which can lead to driver damage if not properly managed.
Innovation Solution
A software-based drive control method that uses the driver to feed a voltage or current signal to the motor and measure the output features to detect the interlocking state, allowing automatic protection of the driver without modifying its circuit or structure, thereby eliminating the need for mechanical interlocks and DI port occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical interlocks are used to ensure switch interlocking relationship, then driver protection is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical interlock switches with a software-based detection mechanism. The driver control unit uses its existing DI ports to read the states of KDx and KMx switches, and through software logic (checking interlocking relationships and outputting warning signals), achieves driver protection without any mechanical interlock hardware.
Solution Approach 2:
The driver control unit performs self-protection by autonomously detecting switch states through its DI ports, analyzing interlocking relationships, and generating warning signals when improper switching is detected. This eliminates the need for external mechanical interlock devices while maintaining driver safety.
2Reliability
If auxiliary contacts of switches are connected to DI ports of driver control unit, then interlocking detection is improved, but device complexity increases due to PLC requirement
Solution Approach 1:
The driver control unit autonomously performs interlocking detection using its built-in DI ports and software processing capabilities. It reads switch states, analyzes interlocking relationships, and generates warnings without requiring external PLC hardware, thereby simplifying the system while maintaining reliable detection.
3Reliability
If DI ports are occupied by switch auxiliary contacts, then interlocking detection is enabled, but adaptability decreases due to limited DI ports
Solution Approach 1:
The patent makes the driver control unit's DI ports multi-functional: they serve both as inputs for switch state detection (enabling interlocking detection) and as general-purpose digital inputs for other control functions. The software-based approach allows the same hardware resources to support multiple functions simultaneously, enhancing system adaptability.
Data Source
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AI summary
The present invention provides a drive control method applicable to a drive system comprising a driver, a bus and a motor, wherein the motor is directly connected to the bus (first connection mode) or connected to the driver (second connection mode). The drive control method comprises: the driver feeding an electric signal to the motor through the output port and simultaneously detecting its own actual output feature; the driver determining whether the output port is connected to the bus according to the actual output feature; if the output port is not connected to the bus, the driver starting the motor normally; if the output port is connected to the bus, the driver disconnecting the output port. In addition, the present invention further provides a corresponding drive system, a processing system and a storage medium.