Battery Electric Roller With Inverter Speed Control
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Solution Overview
Problem
Conventional compaction rollers emit greenhouse gases, produce noise and exhaust heat, and have poor maintainability, including hydraulic oil leakage and frequent oil replacement, while lacking effective speed control.
Innovation Solution
An electric roller design utilizing compaction-wheel electric motors, inverters, and batteries for power, with a control unit to manage speed and inclination, eliminating internal combustion engines and hydraulic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an internal combustion engine is used to power the compaction roller, then the vehicle can operate with high power output, but it causes greenhouse gas emissions, noise, and exhaust heat that worsen the work environment
Solution Approach 1:
The patent replaces the internal combustion engine with an electric motor system. The electric roller uses a motor driven by a battery pack instead of a fuel-burning engine, eliminating exhaust emissions and significantly reducing noise. The motor converts electrical energy directly to mechanical motion, providing the necessary power for compaction operations without the harmful byproducts of combustion engines.
2Reliability
If a hydraulic system is used to control the compaction roller, then the vehicle can achieve reliable power transmission, but it suffers from hydraulic oil leakage and frequent oil replacement that reduce maintainability
Solution Approach 1:
The patent eliminates the hydraulic transmission system entirely and adopts direct electric motor drive. The motor is connected directly to the compaction wheel through a simplified mechanical connection, removing hydraulic oil circuits, pumps, and valves. This electric direct-drive system eliminates hydraulic oil leakage problems and reduces maintenance requirements while maintaining reliable power transmission.
3Ease of operation
If conventional hydraulic control is used for speed regulation, then the system can provide basic speed control, but it lacks precise speed control capability that is needed for improved operational efficiency
Solution Approach 1:
The patent incorporates a control unit that receives input from a lever operation detector and a speed detector. The speed detector monitors the actual rotation speed of the compaction wheel and feeds this information back to the control unit. The control unit then adjusts the motor's power output to maintain the desired speed, enabling precise speed control that responds accurately to operator input and actual vehicle conditions.
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 electric roller reduces fuel consumption and emissions, improves operator safety and work environment, enhances maintainability, and facilitates precise speed control.
Implementation Method 1
at least one compaction-wheel electric motor to drive the compaction wheels
Implementation Method 2
at least one battery to supply power to the compaction-wheel electric motor and compaction-wheel inverter
Implementation Method 3
at least one compaction-wheel inverter to control rotation speed of the compaction-wheel electric motor
Data Source
AI summary
An electric roller (1) includes: a pair of front and rear compaction wheels (a front wheel (R1) and a rear wheel (R2)); a vehicle frame (2) rotatably supporting the compaction wheels; at least one compaction-wheel electric motor (front-wheel electric motor (M1), right rear-wheel electric motor (M2), and left rear-wheel electric motor (R3)) to drive the compaction wheels; at least one compaction-wheel inverter (front-wheel inverter (J1), right rear-wheel inverter (J2), and left rear-wheel inverter (J3)) to control rotation speed of the compaction-wheel electric motor; at least one battery (K) to supply power to the compaction-wheel electric motor and compaction-wheel inverter; and a control unit (3) to output a signal to the compaction-wheel inverter according to a degree of inclination of a forward-backward lever (17), wherein the electric roller (1) has no internal combustion engine and uses only the battery (K) as a power source for the compaction wheels.