Electric Seat Motor Drive Control for Jamming Prevention
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Solution Overview
Problem
Conventional electric seats experience jamming and output shortages during movement, leading to shocks and discomfort, especially when reaching the terminal end of the rail, which hampers convenience and safety.
Innovation Solution
A drive control method that detects motor signals, determines termination type, and adjusts motor output to prevent jamming by driving with a preset maximum output value when forced termination occurs, and gradually increases output during normal termination to avoid shock and recoil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor is driven in the always maximum output state to prevent jamming and ensure quick escape from restriction, then the reliability is improved, but shock occurs at the time of achievement of the function which hampers convenience
Solution Approach 1:
The motor output is dynamically adjusted based on the operational context: maximum output is applied when escaping from jamming situations, while normal output is used during regular seat movement. This dynamic adjustment resolves the contradiction by making the system adaptable to different operational states rather than maintaining a fixed output level.
Solution Approach 2:
The motor output parameter is changed based on the termination type detection. When forced termination is detected (indicating jamming), the output is set to maximum; when normal termination is detected, the output returns to normal levels. This parameter change strategy allows the system to prevent jamming when necessary while avoiding shock during normal operation.
2Ease of operation
If the motor is gradually driven with sequential turning on/off to reduce shock and recoil sound, then the ease of operation is improved, but the ability to quickly escape from jamming is reduced
Solution Approach 1:
The driving strategy is dynamically selected based on the termination type: gradual sequential driving is used during normal operation for smooth entry, while immediate maximum output driving is applied when jamming is detected for quick escape. This resolves the contradiction by making the driving behavior context-dependent.
Solution Approach 2:
The system uses feedback from the termination type detection to determine the appropriate driving strategy. By monitoring whether the previous driving was forcibly terminated or normally terminated, the system adjusts its driving behavior accordingly, ensuring smooth operation when possible and quick escape when jamming occurs.
3Reliability
If the motor output is increased to prevent torque shortage and overheating during jamming, then the reliability is improved, but the impact and recoil sounds increase during normal operation
Solution Approach 1:
The motor output parameter is changed based on the operational state: maximum output is applied when forced termination (jamming) is detected to prevent torque shortage, while normal output is maintained during regular operation to avoid generating impact and recoil sounds. This parameter adaptation resolves the contradiction between reliability and harmful factors.
Data Source
AI summary
Provided a method for controlling the driving of an electric seat, the method including a step of detecting a motor driving signal of an electric seat; a stop determination step of determining whether the motor is forcibly terminated or normally terminated during the previous driving; and a driving step of driving the motor with a preset driving output value when previous driving of the motor is forcibly terminated.