Elevator Power Supply Placement for Motor Noise Isolation in Cabs
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Solution Overview
Problem
Elevator systems, especially self-propelled climbing elevators, face challenges in reducing noise transmission from the motor module to the elevator cab, leading to increased noise levels within the cab due to the absence of a machine room and the proximity of the motor to the car.
Innovation Solution
The use of a power supply with energy sources, such as batteries, strategically positioned between the motor module and the elevator cab to act as a noise barrier, utilizing their mass to absorb and insulate noise, with a housing configuration that includes sound-insulating materials to further reduce noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the motor module is placed close to the elevator cab to eliminate the machine room, then space utilization is improved, but noise transmission into the cab increases
Solution Approach 1:
The power supply assembly acts as an intermediary noise barrier positioned between the motor module and the elevator cab. The mass of the energy sources (batteries) provides acoustic insulation, reducing noise transmission into the cab while allowing the motor module to remain adjacent to the cab for space efficiency.
Solution Approach 2:
The power supply assembly serves multiple functions: it provides electrical power to the motor module and simultaneously acts as a noise barrier. This multi-functionality eliminates the need for separate noise insulation materials, saving space and reducing overall system complexity.
2Object-affected harmful factors
If additional noise-reducing materials are added to reduce noise transmission, then noise insulation is improved, but device complexity and space requirements increase
Solution Approach 1:
The power supply assembly serves dual purposes: providing electrical power and acting as a noise barrier. This eliminates the need for additional separate noise-reducing materials, thereby reducing device complexity and space requirements while maintaining effective noise insulation.
Solution Approach 2:
The noise barrier function is merged with the power supply structure. The mass of the energy sources is utilized for acoustic insulation, combining two functions into a single integrated component rather than adding separate noise-reducing materials.
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
Effectively reduces noise transmission into the elevator cab by leveraging the mass of the energy sources and sound-insulating materials, enhancing passenger comfort without the need for additional noise-reducing materials, thus saving space and cost.
Implementation Method 1
a mass of the at least one energy source provides a noise barrier to reduce transmission of noise from the motor into the elevator cab
Data Source
AI summary
An illustrative example embodiment of an elevator propulsion device includes at least one drive member configured to engage and climb along a vertical structure, a motor module including at least one motor configured to cause movement of the drive member and corresponding movement of an elevator cab, and a power supply including at least one energy source that is configured to provide power to the motor. The power supply is situated adjacent the motor module such that a mass of the at least one energy source provides a noise barrier to reduce transmission of noise from the motor into the elevator cab.