Encoder Memory Erasure for Motor Replacement Accuracy
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Solution Overview
Problem
When an encoder storing motor-specific information is removed from one motor and mounted on another, the remaining information is incorrect and causes detection errors and malfunctions, as it does not match the new motor's specifications.
Innovation Solution
An encoder with a mount determination unit and memory information erasure unit that detects when it is removed from a motor and erases the stored motor-specific information, using a connection detection mechanism via conducting wires from a temperature sensor to ensure accurate data for the new motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If motor-specific information is stored in the encoder memory for accurate motor control and maintenance, then the motor control efficiency and stability are improved, but when the encoder is removed and mounted on another motor, the stored information becomes incorrect and causes detection errors and malfunctions
Solution Approach 1:
The patent applies preliminary action by detecting encoder removal in advance and erasing motor-specific information from memory before the encoder is mounted on a new motor. The mount determination unit continuously monitors the connection state, and when removal is detected, the memory information erasure unit proactively clears the stored motor-specific information (such as back electromotive force constant, inductance, resistance, and mounting deviation angle) to prevent future detection errors and malfunctions.
2Productivity
If an encoder with stored motor-specific information is replaced on a new motor without erasing the old information, then the replacement process is simplified and productivity is improved, but the old motor-specific information causes detection errors and makes the motor uncontrollable
Solution Approach 1:
The patent applies self-service by enabling the encoder to automatically detect its own removal state and autonomously erase its own motor-specific information from memory without requiring external intervention. The mount determination unit detects when the encoder is removed from the motor by monitoring connection status, and the memory information erasure unit automatically clears the stored information, allowing the encoder to serve itself in maintaining data accuracy during replacement operations.
3Quantity of substance
If motor-specific information is retained in the encoder memory after motor replacement, then data storage capacity is utilized efficiently, but the retained information becomes meaningless and harmful for the new motor operation
Solution Approach 1:
The patent applies discarding and recovering by systematically discarding (erasing) motor-specific information from memory when the encoder is removed from a motor. The mount determination unit identifies when the encoder is no longer connected to a motor, and the memory information erasure unit discards the associated motor-specific information (back electromotive force constant, inductance, resistance, mounting deviation angle), preventing this outdated data from causing harmful detection errors or malfunctions on the new motor.
Data Source
AI summary
An encoder which detects information on the position or the speed of a motor includes memory which stores motor-specific information on the motor to be mounted on the encoder, a mount determination unit which determines whether the encoder has been removed from the motor, and a memory information erasure unit which erases the motor-specific information stored in the memory when the mount determination unit determines that the encoder has been removed from the motor.