E-Bike Control Circuit Layout for Flexible Motor Installation
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Solution Overview
Problem
In electric power assist bicycles, the arithmetic device that calculates torque generated by the electric motor is often disposed in the same case as the motor, making it difficult to install the device on certain vehicle types, especially when ordering components from different manufacturers.
Innovation Solution
The vehicle design separates the electric motor and the power storage device, with the arithmetic device housed inside or adjacent to the power storage device, allowing for independent sourcing and installation of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the arithmetic device is disposed in the same case as the electric motor, then the device structure is simplified, but it becomes difficult to install on certain vehicle types and limits component sourcing flexibility
Solution Approach 1:
The patent divides the integrated motor-case structure into separate components: the electric motor with its case, and the arithmetic device housed in a separate container. This segmentation allows each component to be independently sourced, manufactured, and installed, resolving the contradiction between structural simplicity and installation flexibility.
2Device complexity
If the arithmetic device is disposed in the same case as the electric motor, then the number of parts is reduced, but it prevents ordering components from different manufacturers
Solution Approach 1:
By separating the arithmetic device into an independent component with its own container, the patent enables each part to be manufactured by different specialists and sourced from different manufacturers, while still maintaining a relatively simple overall structure through the defined spatial relationship between components.
3Volume of moving object
If the electric motor and power storage device are integrated, then the vehicle structure is compact, but it restricts installation options for different vehicle types
Solution Approach 1:
The patent separates the electric motor and power storage device into distinct locations within the vehicle. The motor is mounted near the wheel while the battery is positioned separately in the vehicle body, allowing each component to be optimally positioned for different vehicle types while maintaining a compact overall arrangement.
Solution Approach 2:
The patent creates a universal mounting configuration that can be adapted to different vehicle types. The separate positioning of motor and battery, along with the defined spatial relationships, allows the same component design to be installed on various bicycle and vehicle frames without major redesign.
Data Source
AI summary
An electric bicycle according to the present invention includes: a rear wheel; a power unit which drives the rear wheel; a battery unit electrically connected to the power unit; and a control circuit which calculates an instruction value or a required value correlated to the power generated from the power unit. The power unit and the battery unit are disposed to be spaced apart from each other, and the control circuit is spaced apart from the power unit and is disposed inside the battery unit or adjacent to the battery unit.