AC Rotating Machine Control Device with Backup Master Station
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Solution Overview
Problem
Existing power conversion systems for alternating current rotating machines lack the ability to connect and share information from accompanying instruments like temperature sensors with inverter devices, leading to incomplete control and lack of automatic recovery in case of communication failures.
Innovation Solution
An alternating current rotating machine control device with a secondary communication means connecting power conversion devices and accompanying instruments, allowing for shared control status information and automatic recovery by designating one device as a master station and enabling communication between power conversion devices and instruments, with the capability to switch to a backup master station in case of communication failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single master station is used to control multiple power conversion devices, then the system structure is simple and easy to manage, but the system lacks reliability and cannot automatically recover from communication failures
Solution Approach 1:
The patent designates a backup master station in advance before communication failures occur. When the current master station fails, the backup master station can immediately take over, enabling automatic recovery without manual intervention. This preliminary preparation of a standby controller resolves the contradiction by maintaining simple system structure while ensuring reliability through pre-configured failover capability.
Solution Approach 2:
The patent introduces a backup master station as a cushioning measure against communication failures. This redundant component acts as a safety buffer, ensuring that when the primary master station fails, the system can continue operating without interruption. The backup station cushions the impact of communication failures, maintaining both system simplicity and reliability.
2Device complexity
If only power conversion devices are connected via communication line, then the communication system is simple, but accompanying instruments like temperature sensors cannot share information with inverter devices
Solution Approach 1:
The patent makes the communication line universal by enabling it to connect not only power conversion devices but also accompanying instruments such as temperature sensors and pressure sensors. This multi-functional communication infrastructure allows information from various instruments to be shared across the system, resolving the contradiction by maintaining communication system simplicity while eliminating information loss through expanded connectivity.
3Ease of operation
If the master station centrally controls all information, then the control structure is centralized and manageable, but automatic recovery is not possible when communication fails
Solution Approach 1:
The patent designates a backup master station in advance that is prepared to take over control functions automatically when the current master station fails. This preliminary preparation enables automatic recovery without requiring manual intervention, resolving the contradiction by maintaining centralized control manageability while introducing automation through pre-configured failover capability.
Data Source
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AI summary
There is provided an alternating current rotating machine control device wherein, by sharing information among a plurality of power conversion devices and other accompanying instruments, and thus strengthening an alternating current rotating machine drive linkage, the optimization of a whole power conversion system is facilitated. A power conversion system has a distributed configuration of a top level control device (10) configuring a master station, a plurality of power conversion devices (11 to 13), accompanying information instruments (various kinds of sensor instrument such as a temperature sensor (14) and a pressure sensor (15)), and the like. The top level control device (10) is connected to the power conversion devices (11 and 12) by a first communication line (22). Furthermore, the power conversion devices (11 and 12) are provided with two or more communication functions, and are connected to the remaining power conversion device (13), temperature sensor (14), and pressure sensor (15) by a second communication line (23).