Variable-Speed Speed-Up Mechanism Clutch Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In variable-speed speed-up mechanisms, the variable-speed electric motor can excessively rotate due to the rotational speed of the constant-speed electric motor and inertia when either motor trips, leading to potential damage.
Innovation Solution
Incorporating a clutch device that can block the rotation of either the constant-speed or variable-speed rotor, allowing for controlled stopping of the variable-speed electric motor to prevent excessive rotation, and a control system to manage the motors' states during trips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the variable-speed electric motor is connected through the planetary gear transmission device to the constant-speed electric motor, then the rotational speed of the output shaft can be controlled by changing the rotational speed of the variable-speed electric motor, but the variable-speed electric motor may excessively rotate due to the rotational speed of the constant-speed electric motor and the inertia of the compressor when either motor trips
Solution Approach 1:
A clutch device is introduced as an intermediary component between the electric motors and the planetary gear transmission device. The clutch device includes a constant-speed clutch connected to the constant-speed electric motor and a variable-speed clutch connected to the variable-speed electric motor. When either motor trips, the control device activates the appropriate clutch to disconnect the corresponding motor from the transmission device, preventing excessive rotation while allowing normal speed control operation during normal operation
2Reliability
If a clutch device is added to block rotation and prevent excessive rotation, then reliability is improved, but device complexity increases
Solution Approach 1:
The clutch device is designed with multi-functionality to reduce overall system complexity. The same clutch mechanism serves both to connect the motors to the transmission device during normal operation and to disconnect them when tripping occurs. The control device integrates the logic for determining which clutch to activate based on which motor tripped, making the system adaptable without requiring separate specialized components for each protection scenario
Data Source
AI summary
A variable-speed speed-up mechanism includes: an electric device which is configured to generate a rotational driving force and a planetary gear transmission device which is configured to change the speed of the rotational driving force transmitted from the electric device to a constant-speed input shaft and a variable-speed input shaft and transmit the rotational driving force to a target to be driven via an output shaft. The electric device includes a constant-speed electric motor including a constant-speed rotor which is configured to rotate the constant-speed input shaft of the planetary gear transmission device and a variable-speed electric motor including a variable-speed rotor which is configured to rotate the variable-speed input shaft of the planetary gear transmission device.