Centralized Multi-Motor Drive Control with Segmented Power Supply
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Solution Overview
Problem
Conventional centralized control mechanisms for multi-motor drives have complex circuit configurations, leading to high production costs and unstable power supply, affecting all microprocessors simultaneously when voltage is unstable.
Innovation Solution
A centralized control mechanism comprising independent motor drive modules, a power source module, an interface control microprocessor, a communication module, and interface modules, where each motor drive module includes a motor microprocessor, inverter circuit, and phase current detection circuit, with multiple power supplies and a data bus for communication, integrated on a single circuit board for compact layout and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional centralized control mechanism uses a single power supply output terminal for multiple microprocessors, then the circuit configuration is simple, but the power supply stability deteriorates and all microprocessors are affected simultaneously when voltage is unstable
Solution Approach 1:
The patent divides the single power supply into multiple independent power supply output terminals, with each microprocessor having its own dedicated power supply. This segmentation isolates the power supply paths, so that voltage instability or failures in one microprocessor's power supply do not affect other microprocessors, thereby improving power supply stability while maintaining reasonable circuit complexity
Solution Approach 2:
Each microprocessor is provided with its own dedicated power supply output terminal with customized voltage and current characteristics suited to that specific microprocessor's requirements. This local optimization ensures that each microprocessor receives stable, appropriate power independently, improving overall system reliability without requiring a completely complex centralized power distribution system
2Reliability
If a conventional centralized control mechanism uses a complex circuit configuration, then the power supply stability can be improved, but the production cost increases
Solution Approach 1:
The patent combines multiple power supply functions into a single power supply module that provides multiple independent output terminals. This merging approach maintains power supply stability through independent outputs while reducing production costs by using one integrated power supply module instead of multiple separate power supply units, simplifying manufacturing and assembly
Solution Approach 2:
The power supply module is designed with multi-functionality, providing multiple independent power supply outputs from a single device. This universal power supply can serve multiple microprocessors simultaneously with different voltage and current requirements, improving reliability through independent power paths while keeping production costs low through component consolidation
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 results in a cost-effective, stable, and reliable multi-motor drive system with flexible interface management, reducing manufacturing costs and ensuring high operating rates and stable power output.
Implementation Method 1
the motor microprocessor outputs multiple paths of PWM signals to the inverter circuit and controls the inverter circuit to work; an output end of the inverter circuit is connected to a coil winding of the PM motor
Implementation Method 2
the phase current detection circuit transmits detected data to the motor microprocessor
Data Source
AI summary
A centralized control mechanism for a multi-motor drive, the mechanism including: a plurality of independent motor drive modules; a power source module; an interface control microprocessor; a communication module; and a plurality of interface modules of motors. The power source module supplies power for each circuit, and each independent motor drive module drives one permanent magnet motor. Each motor drive module includes a motor microprocessor, an inverter circuit, and a phase current detection circuit. The phase current detection circuit transmits detected data to the motor microprocessor, and the motor microprocessor outputs multiple paths of PWM signals to the inverter circuit and controls the inverter circuit. An output end of the inverter circuit is connected to a coil winding of the PM motor. The plurality of motor microprocessors communicates with the interface control microprocessor via a data bus. The interface control microprocessor communicates with the outside via the communication module.