Motor Control Device Inverter Switching for Redundancy
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Solution Overview
Problem
Existing motor control devices face challenges in selectively or simultaneously using multiple inverters based on operational situations, which affects the reliability and efficiency of motor drive control.
Innovation Solution
A motor control device is designed with a first inverter switching control unit and a microcomputer that selectively or simultaneously outputs motor command signals to multiple inverter units, allowing for adaptive use based on situation-specific requirements, including switching control signals to manage output between normal and faulty inverter units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple inverters are configured for redundant operation, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic switching control between multiple inverters based on real-time operational status. The control device dynamically selects which inverter to use by generating appropriate switching signals, allowing the system to adapt to failures or varying load conditions while maintaining reliable motor drive control without permanently increasing system complexity.
2Adaptability or versatility
If inverters are selectively used based on situations, then adaptability is improved, but control complexity increases
Solution Approach 1:
The control device is designed with multi-functional capabilities to selectively output motor command signals to different inverters based on operational requirements. It can universally control multiple inverters through a standardized switching mechanism, providing adaptability without requiring separate control systems for each inverter configuration.
3Power
If simultaneous use of multiple inverters is enabled, then power output capability is improved, but control difficulty increases
Solution Approach 1:
The patent segments the control of multiple inverters by independently managing motor command signals for each inverter through the switching control device. This segmentation allows each inverter to be controlled separately based on power requirements, simplifying the coordination of simultaneous operation and reducing control difficulty while maintaining improved power output capability.
Data Source
AI summary
A motor control device includes a first inverter selector configured to output first PWM signals selectively or simultaneously to a first inverter unit and a second inverter unit, and a first microcomputer configured to output the first PWM signals and a first selection signal to the first inverter selector, and the first selection signal contains information on whether the first PWM signals are to be output to the first inverter unit and whether the first PWM signals are to be output to the second inverter unit.