Motor Drive Sensor Power Sharing for Fault-Tolerant Control
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Solution Overview
Problem
The reliability of motor drive control systems is compromised when a failure occurs in the power supply to sensors, and increasing the number of sensors in each energization system raises costs and space requirements.
Innovation Solution
A motor drive control apparatus with independent energization systems, each equipped with sensors and a controller, features a power supply path and semiconductor switches that allow for emergency power sharing between systems when a voltage drop is detected, enabling continued control without increasing the number of sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If more sensors are used in each energization system to ensure continuous operation, then reliability is improved, but cost and space requirements increase
Solution Approach 1:
The patent merges the power supply resources of multiple energization systems by providing a power supply path that can supply power to sensors in different energization systems. When a sensor in one energization system fails, the power supply path can redirect power from another energization system to maintain sensor operation, thereby improving reliability without adding more sensors.
2Reliability
If more sensors are used in each energization system to ensure continuous operation, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal power supply path that can serve multiple energization systems. This power supply path is designed to dynamically allocate power to sensors across different energization systems based on their operational status, reducing the need for redundant sensors and simplifying the overall circuit architecture while maintaining high reliability.
3Reliability
If more sensors are used in each energization system to ensure continuous operation, then reliability is improved, but cost increases
Solution Approach 1:
The patent enables the power supply system to automatically detect sensor failures and reallocate power resources without external intervention. When a sensor fails in one energization system, the control device automatically redirects power from the power supply path to maintain sensor functionality, eliminating the need for additional sensors and reducing manufacturing costs while ensuring continuous operation.
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
This configuration enhances the reliability of motor drive control by allowing emergency power supply from one system to another, maintaining control without adding sensors, thus reducing costs and space requirements.
Implementation Method 1
a semiconductor switch which is provided for each of the sub power supply paths and which, between two different energization systems, when a first energization system exhibits an abnormality indicating a drop in a voltage of the power supply supplied to the corresponding sensors, electrically connects the power supply path in the first energization system with the power supply path in a second energization system
Data Source
AI summary
A motor drive control apparatus includes energization systems for energizing a motor having a plurality of independent winding sets, with the energization systems corresponding one-to-one to the winding sets. A plurality of sensors is provided for each of the energization systems. A controller is provided for each of the energization systems and controls energization of the corresponding winding set based on output signals of the corresponding sensors. A plurality of sub power supply paths is provided for their respective energization systems. Each sub power supply path connects a power supply path for supplying power to the corresponding sensors and a power supply path in another energization system. A semiconductor switch is provided for each of the sub power supply paths, and, between two different energization systems, when one of the two energization systems exhibits a sensor power supply failure, electrically connects the power supply paths of these two energization systems.