Aerial Work Platform Electric Drive for Speed and Passing Performance
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Solution Overview
Problem
Existing arm-type aerial work platforms face issues with poor driving performance, insufficient passing performance, and poor speed regulation, along with high energy consumption and complex control systems, leading to reduced reliability and increased customer charging times.
Innovation Solution
The arm-type aerial work platform incorporates a chassis mechanism with front and rear drive axles and a walking drive mechanism featuring a transfer case and a first drive motor, which includes a permanent magnet synchronization motor and an alternating current driver, to enhance driving performance and simplify control operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a three-phase alternating current asynchronous motor combined with a plunger pump is used for the turntable rotation mechanism and boom mechanism, then the movement control is achieved, but the power density is low and energy consumption is high
Solution Approach 1:
The patent replaces the traditional plunger pump mechanical drive system with an electric direct drive system. Specifically, it uses a permanent magnet synchronous motor with an alternating current driver to directly drive the turntable rotation mechanism and boom mechanism, eliminating the need for a plunger pump and its associated mechanical transmission components. This substitution significantly improves power density and reduces energy consumption while extending battery life.
2Reliability
If a wheel-drive control mode is used for the chassis, then the driving mechanism is simplified, but the driving performance and passing performance are poor
Solution Approach 1:
The patent segments the drive system into independent permanent magnet synchronous motors for each drive wheel, with each motor independently controlled by its own alternating current driver. This segmentation allows each wheel to be controlled individually, improving driving performance and passing capability while maintaining manageable control system complexity through modular architecture.
3Ease of operation
If a pump drive control system is used, then the turntable and boom movements are controlled, but the control system is complex and produces more noise
Solution Approach 1:
The patent eliminates the pump-driven hydraulic control system and replaces it with direct electric motor control. The permanent magnet synchronous motors with alternating current drivers provide precise control of the turntable and boom mechanisms without the complexity of hydraulic pumps, valves, and fluid management systems. This electric direct drive system significantly reduces noise levels while simplifying the control architecture.
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 improves driving performance, passing performance, and speed regulation, while reducing energy consumption and enhancing the overall reliability of the arm-type aerial work platform.
Implementation Method 1
The first drive motor includes a first permanent magnet synchronization motor and a first alternating current driver
Data Source
AI summary
Provided is an arm-type aerial work platform. The platform includes a chassis mechanism and a walking drive mechanism. The chassis mechanism includes a front drive axle, a rear drive axle, front drive wheels on two sides of the front drive axle, and rear drive wheels on two sides of the rear drive axle. The walking drive mechanism includes a front transmission shaft, a rear transmission shaft, a transfer case, and a first drive motor. The first drive motor includes a first permanent magnet synchronization motor and a first alternating current driver, an input terminal of the first permanent magnet synchronization motor is electrically connected to the first alternating current driver, and an output terminal of the first permanent magnet synchronization motor is connected to an input terminal of the transfer case.