Epicyclic Gearbox Superimposing Motor Torque for Wide Speed Range
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional geared motors and manual transmissions face inefficiencies in part-load operation and low speeds, and they typically achieve lower torque at high speeds compared to low speeds, failing to optimize efficiency and torque delivery across a wide range.
Innovation Solution
A geared motor system incorporating an epicyclic gearbox with two electric motors, where one motor drives the gearbox's first gear stage and another motor drives additional gear stages, allowing for constant high torque generation across a wide speed range by superimposing rotary movements, and a controller regulates motor speeds and torques for optimal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a geared motor is designed for full-load operation, then it can drive the nominal load, but it does not achieve optimum efficiencies in part-load operation or at low speeds
Solution Approach 1:
The transmission system is divided into multiple independent gear stages (first gear stage, second gear stage, third gear stage) that can be selectively engaged. This segmentation allows the system to optimize the transmission path for different operating conditions, achieving high efficiency in both full-load and part-load operations by selecting the most appropriate gear stage for the current demand.
2Device complexity
If a single motor drives all gear stages, then the structure is simpler, but the efficiency is not optimal across varying loads and speeds
Solution Approach 1:
Multiple electric motors are combined to drive different gear stages simultaneously or independently. This merging of motor resources allows the system to optimize efficiency across varying loads by distributing the driving task among multiple motors, each operating in its optimal efficiency range, while maintaining a relatively compact integrated structure.
3Speed
If the geared motor operates at variable speeds, then it can adapt to different applications, but the torque delivery is not constant across the speed range
Solution Approach 1:
The system changes transmission parameters (gear stage selection, motor speed ratios) based on the operating conditions. By selectively engaging different gear stages and adjusting motor speeds, the system maintains substantially constant torque delivery across a wide speed range, with the torque remaining within 5% of the maximum value throughout the permissible operating range.
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 ensures constant and high torque delivery across a wide speed range, optimizing efficiency and energy savings, making it suitable for applications with varying loads and reducing environmental impact.
Implementation Method 1
a first electric motor M1 for driving a first toothed part of a superimposed gear G and a second electric motor M2 for driving a second toothed part of the superimposed gear G
Implementation Method 2
superimposing rotary movements, and a controller regulates motor speeds and torques for optimal efficiency
Implementation Method 3
A geared motor system incorporating an epicyclic gearbox with two electric motors, where one motor drives the gearbox's first gear stage and another motor drives additional gear stages
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a transmission engine, to a transmission system and to a method for operating a system, comprising a transmission driven by an engine, wherein the transmission comprises gear components, wherein a further engine drives one of the gear components.