Dual-Drive Electric Machine Controllable Planetary Gear Brake Locking
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Solution Overview
Problem
Conventional friction type electromagnetic clutch devices often leave residual rotary torque during disengagement, leading to kinetic energy loss and ineffective operation.
Innovation Solution
A dual-drive electric machine with a controllable planetary gear set, where the inner and outer rotation parts are connected to a planetary wheel and rocker arm on a rotation shaft, and the sun and annular wheels are connected to a sleeve type rotation shaft, allowing for brake locking or releasing through a controllable brake device to control the transmission and interaction between the rotation shafts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a friction type electromagnetic clutch device is used to engage or release the load, then the operation of combining or releasing the load with the rotary electric machine is enabled, but residual rotary torque remains during releasing which causes kinetic energy loss and ineffective operation
Solution Approach 1:
The planetary gear set serves as an intermediary mechanism between the clutch device and the load. By engaging the brake device on the sun wheel or planet carrier, the planetary gear set provides a mechanical path to completely stop the load rotation, eliminating residual rotary torque that would otherwise remain with direct clutch disengagement. This mediator structure enables complete energy dissipation during release operation.
Solution Approach 2:
The invention replaces the purely friction-based electromagnetic clutch release mechanism with a controlled mechanical braking system. Instead of relying solely on friction clutch disengagement which leaves residual torque, the system uses a brake device actuated through the planetary gear set to mechanically enforce complete stopping. This substitution of the release mechanism eliminates kinetic energy loss by ensuring full rotational cessation.
2Ease of operation
If a brake device is added to control the planetary gear set output shaft, then precise control over transmission and operation is enabled, but the device complexity increases
Solution Approach 1:
The planetary gear set is designed to serve multiple functions: it provides gear reduction for torque multiplication, enables bidirectional power flow for regenerative braking, and serves as the mounting structure for the brake device. The sun wheel, planet gears, and planet carrier can each independently serve as brake application points, allowing a single brake device to control multiple transmission states (engagement, disengagement, regenerative braking). This multi-functionality reduces the need for separate control mechanisms for each function.
Solution Approach 2:
The brake device is integrated directly into the planetary gear set structure rather than being added as a separate external component. The brake device is positioned to act on the sun wheel or planet carrier which are inherent parts of the planetary gear assembly. This merging of the brake function with the existing gear structure minimizes additional complexity while achieving precise transmission control through the planetary mechanism's inherent mechanical advantages.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables precise control over the transmission and operation of the dual-drive electric machine, minimizing kinetic energy loss by effectively engaging and disengaging the load, thereby improving operational efficiency.
Implementation Method 1
through controlling the controllable brake device to perform brake locking or releasing
Data Source
AI summary
The present invention relates to a clutch device structured by a dual-drive electric machine being combined with an planetary gear set (DG101) and a controllable brake device, and through controlling the controllable brake device to perform brake locking or releasing, the operations of transmission function of connecting transmission or releasing between a rotation shaft (S101) at an output/input end, a rotation shaft (S102) at an output/input end and a sleeve type rotation shaft (AS101) at an output/input end of the planetary gear set (DG101) are enabled to be controlled, thereby to control the interactive operations between the dual-drive electric machine (EM100) and the output/input ends.