Electronic Control Apparatus for Rotating Electrical Machine Power Supply
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Solution Overview
Problem
Communication abnormalities between the host control apparatus and the rotating electric machine unit in a vehicle's power supply system lead to prolonged voltage supply from the external storage battery, causing depletion or degradation of the battery and potential engine startup failures.
Innovation Solution
An electronic control apparatus that includes a power generation control unit, storage batteries, switches, and a host control unit, which determines a process completion condition independently of the host control unit, maintaining the first switch in an on state until the switch-off process is completed, even in the presence of communication abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the host control apparatus relies on communication with the rotating electric machine unit to determine process completion, then the control system maintains centralized coordination, but communication abnormalities cause prolonged voltage supply and battery degradation
Solution Approach 1:
The rotating electric machine unit independently determines whether the switch-off process is completed by monitoring its own operational state, without relying on communication with the host control apparatus. This self-determination mechanism allows the system to autonomously manage the switching operation and avoid prolonged battery discharge caused by communication failures.
2Reliability
If the first switch remains on until host control apparatus confirmation, then centralized control is maintained, but communication failures prevent switch-off and cause battery depletion
Solution Approach 1:
The rotating electric machine unit autonomously determines the completion of the switch-off process by monitoring its own operational parameters and state changes. This self-determination enables the first switch to be turned off promptly after the actual switch-off is achieved, regardless of communication status with the host control apparatus, thereby limiting unnecessary voltage supply duration.
3Reliability
If independent process completion determination is implemented, then communication robustness is improved, but the system complexity increases
Solution Approach 1:
The rotating electric machine unit uses its existing operational state information and control parameters to determine whether the switch-off process is completed. By leveraging already-available data within the unit, the invention avoids adding complex external monitoring systems while achieving independent determination capability.
Data Source
AI summary
An electronic control apparatus is used for a power supply system that includes a rotating electric machine, a power generation control unit, first and second storage batteries, first and second switches, and a host control unit. The electronic control apparatus determines whether a predetermined process completion condition is met, without communicating with the host control unit, after an ignition switch of a vehicle is switched from an on state to an off state. The process completion condition indicates that a predetermined switch-off process is completed. The switch-off process is performed by the power generation control unit after the ignition switch is switched from the on state to the off state. The electronic control apparatus maintains the first switch in on state until determined that the process completion condition is met after the ignition switch is switched from the on state to the off state.