Train Traction Control Using Hard-Wired Emergency Mode Switching

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional rail transit train traction and braking control systems require an emergency traction apparatus, increasing production costs and risking failure if the apparatus malfunctions, leading to inability to brake or perform emergency traction.

Innovation Solution

A control method that detects emergency traction information and uses hard-wired signals from a driver controller to enter emergency traction mode, eliminating the need for a dedicated emergency traction apparatus by adjusting motor torque and using hard-wired signals to control traction and braking based on signal type.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an emergency traction apparatus is configured in the train, then emergency traction capability is ensured, but production and development costs increase

Engineering Contradiction:

Improveemergency traction capabilityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the emergency traction function with the existing traction control system by using the same traction inverter and control units. The emergency traction mode is implemented through software control logic that repurposes existing hardware components, eliminating the need for separate emergency traction apparatus and reducing production costs while ensuring emergency traction capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The traction inverter and control system are designed to perform multiple functions: normal traction control and emergency traction. By programming the control unit to recognize emergency traction signals and switch modes, the same hardware serves dual purposes, avoiding additional equipment costs while maintaining reliability for emergency operations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If an emergency traction apparatus is used, then emergency traction can be initiated, but the system complexity increases

Engineering Contradiction:

Improveemergency traction functionVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The emergency traction function is merged into the existing traction control system architecture. The control unit integrates both normal and emergency traction control logic, and the traction inverter serves both modes. This consolidation reduces system complexity by eliminating separate emergency apparatus while maintaining the emergency function through unified control.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12509128B2Control method for train to enter emergency traction mode and train

Publication Date: 2025.12.30 BYD CO LTD

AI summary

A control method for a train to enter an emergency traction mode is provided. The control method for a train to enter an emergency traction mode is applicable to a traction control system of a train. The method includes the following steps: It is detected whether current emergency traction information satisfies a condition of entering an emergency traction mode. When the current emergency traction information satisfies the condition of entering the emergency traction mode, the train is controlled to enter the emergency traction mode. A hard-wired signal sent by a driver controller is received, and a corresponding operation is performed according to a type of the hard-wired signal.