Electrostatic Drive Transmission with Dynamic Voltage Control
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Solution Overview
Problem
Existing drive transmission devices using pulleys and belts face issues with slippage due to excessive voltage application, leading to inefficiencies in power consumption and accuracy in transmitting driving force, especially under varying load conditions.
Innovation Solution
A drive transmission device that includes a motor, pulleys with dielectric and metal layers, and a controller to adjust voltage based on load information, generating an electrostatic attraction force between the pulleys and belt to minimize slippage without excessive voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high voltage is applied to the pulleys to prevent slippage of the belt, then the friction force between pulley and belt is increased, but the power consumption increases
Solution Approach 1:
The voltage applied to the pulleys is made dynamic rather than static. The voltage supply unit adjusts the voltage level based on the actual load conditions detected by the acquisition unit. When load increases and slippage risk rises, voltage is increased; when load decreases, voltage is reduced. This dynamic adjustment maintains reliable slippage prevention while minimizing unnecessary power consumption during low-load operations.
Solution Approach 2:
The electrical parameter (voltage) is changed according to operating conditions. The system monitors load variations and correspondingly adjusts the voltage applied to the pulleys. This parameter change strategy ensures that the electrostatic attraction force between pulley and belt is optimized for each operating state, preventing slippage when needed while reducing power consumption when slippage risk is low.
2Reliability
If a high set value of applied voltage is used to reliably prevent slippage under maximum load, then slippage is suppressed, but power consumption increases under all operating conditions
Solution Approach 1:
Instead of using a fixed high voltage setting for all conditions, the system dynamically changes the voltage parameter based on actual load requirements. The acquisition unit detects current load levels, and the controller adjusts voltage accordingly. This ensures maximum load conditions receive sufficient voltage to prevent slippage, while lighter loads receive proportionally lower voltage, optimizing power consumption across all operating conditions.
Solution Approach 2:
The system implements feedback control where the acquisition unit continuously monitors load conditions and feeds this information back to the controller. The controller then adjusts the voltage supply based on this feedback. This closed-loop control ensures that voltage is optimized for current operating conditions, preventing slippage when load is high while reducing power consumption when load is low, rather than maintaining a constantly high voltage setting.
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 solution effectively reduces power consumption and enhances the accuracy of driving force transmission by efficiently generating necessary friction force, reducing the likelihood of slippage and dust adhesion while minimizing electric discharge.
Implementation Method 1
a dielectric layer configured to be provided between the first pulley and the metal layer and between the second pulley and the metal layer
Implementation Method 2
generate an attraction force between the first pulley and the metal layer of the belt and an attraction force between the second pulley and the metal layer
Data Source
AI summary
A drive transmission device having motor, a first pulley configured to be driven to rotate by the motor, a second pulley configured to be connected to a device, and a belt unit configured to be wound around the first pulley and the second pulley. The belt unit includes a metal layer and a dielectric layer configured to be provided between the first pulley and the metal layer and between the second pulley and the metal layer. The drive transmission device also includes a voltage supply unit configured to supply voltage to cause attraction between the first and second pulleys and the belt and a controller configured to control the voltage of the voltage supply unit based on information indicating load of the device.