Dual Electric Driving Device Torque Distribution
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Solution Overview
Problem
Current single electric driving devices for electric vehicles, such as bicycles and motorcycles, face inefficiencies in power consumption and continuity when overcoming resistance on inclined terrain, as they require high initial horsepower and excessive power consumption, leading to energy-saving and electricity-saving limitations.
Innovation Solution
A dual electric driving device with a main driving motor and an accessory driving motor, utilizing a clutching and speed reducing driving mechanism, which includes a steering gear, outputting module, and speed reducing gear train, to provide sufficient initial dynamic and reduce power consumption by distributing torque between the two motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single electric driving device is used to generate sufficient horsepower at the initial stage to overcome resistance on inclined terrain, then the initial dynamic performance is improved, but the power consumption increases hugely
Solution Approach 1:
The single electric driving device is segmented into two separate motors: a main driving motor and an accessory driving motor. The accessory motor provides additional torque during initial startup and uphill conditions, while the main motor handles continuous operation. This segmentation allows the system to achieve high initial horsepower without requiring the main motor to operate at maximum power consumption continuously.
Solution Approach 2:
The accessory driving motor provides partial action only when needed (during startup and uphill conditions), rather than continuous operation. This partial action approach delivers the necessary excess power temporarily to overcome resistance, then disengages to reduce overall power consumption during normal operation.
2Power
If frequency-switching or voltage-regulating techniques are used to start up and drive a single motor under full load, then the motor can achieve optimal torsional output at high speed, but a huge amount of power is consumed and electricity continuity becomes insufficient
Solution Approach 1:
The driving function is segmented between two motors with different operational characteristics. The accessory motor handles high-torque startup conditions, allowing the main motor to operate in its optimal efficiency range for sustained periods, thereby improving electricity continuity without sacrificing torsional output when needed.
Solution Approach 2:
The system changes operational parameters by switching between two different motors based on operating conditions. During startup and uphill conditions, the accessory motor is activated to provide high torque. During normal operation, only the main motor runs at optimal parameters, reducing power consumption and extending electricity continuity.
3Use of energy by moving object
If a dual electric motor system is used to supply sufficient initial dynamic and distribute torque, then power consumption is reduced and continuity is enhanced, but the device complexity increases
Solution Approach 1:
The two separate driving systems (main motor and accessory motor) are merged into a single integrated driving device housing. This combining approach reduces overall structural complexity compared to having two separate assemblies, while still maintaining the benefits of torque distribution and reduced power consumption.
Solution Approach 2:
The integrated driving device is designed to perform multiple functions: the main motor handles continuous operation and normal driving, while the accessory motor provides assistance during startup and uphill conditions. This multi-functionality is achieved within a single device structure, reducing the need for separate systems and lowering overall complexity.
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
The dual motor system effectively reduces power consumption and enhances continuity by distributing torque, allowing for efficient uphill starts and improved overall performance, achieving electricity-saving and maintaining optimal torsional output.
Implementation Method 1
a single direction clutching bearing correspondingly is mounted in the clutching chamber, one outer ring of the single direction clutching bearing being coaxially rotatable with the inner housing
Implementation Method 2
a speed reducing gear train correspondingly is mounted in the inner housing, comprising a central gear and a plurality of speed reducing gears
Implementation Method 3
a main driving motor (10) including a driving rotary shaft (11), ... an accessory driving motor (40) including a driving rotary shaft (41)
Data Source
AI summary
A dual electric driving device, comprising: a main driving motor including a driving rotary shaft, with a shifting transmission gear being mounted on the front end of the driving rotary shaft; an outputting module being correspondingly mounted on the shifting transmission gear, the outputting module including a shifting driving shaft being rotatable by a driving force of the shifting transmission gear; a clutching and speed reducing driving device being correspondingly sleeved onto the back end of the driving rotary shaft of the main driving motor and coaxially rotatable by being engaged with the driving rotary shaft in one single direction; and an accessory driving motor including a driving shaft, the driving shaft being correspondingly mounted through the clutching and speed reducing driving device, and further being able to push the driving rotary shaft in one single direction to rotate by driving the clutching and speed reducing driving device.