Gearless Multi-Pole Motor Mounted on Revolving Door Glass Ceiling
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Solution Overview
Problem
Existing revolving door designs with glass ceiling elements face challenges in integrating a drive unit due to the large structural dimensions of motors and gearboxes, making it difficult to arrange the drive unit above or below the glass ceiling without significant design modifications.
Innovation Solution
A gearless, electronically commutated multi-pole motor is mounted on the glass ceiling element, eliminating the need for a gearbox and allowing direct connection to the turnstile, with a compact design that fits within the glass ceiling's dimensions, and is protected from environmental influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a traditional motor and gearbox drive unit is used, then sufficient driving torque is achieved, but the large structural dimensions prevent installation on or near the glass ceiling element
Solution Approach 1:
The patent replaces the traditional mechanical gearbox system with a magnetic gearless drive system. The multi-pole motor directly generates rotational motion through electromagnetic fields, eliminating the need for mechanical gear transmission. This substitution reduces the drive unit's structural dimensions while maintaining sufficient driving torque for the revolving door mechanism.
Solution Approach 2:
The patent changes the motor configuration to a multi-pole design with high pole count. This parameter change allows the motor to generate high torque at low speeds directly, eliminating the need for gear multiplication. The high-pole motor's electromagnetic parameters are optimized to provide adequate driving force without requiring a large physical structure.
2Area of stationary object
If the drive unit is mounted on the glass ceiling element, then installation space is optimized, but the glass ceiling must support additional weight
Solution Approach 1:
By replacing the mechanical gearbox with a gearless magnetic drive system, the overall weight of the drive unit is significantly reduced. The multi-pole motor without gearbox components weighs less than the traditional motor-gearbox assembly, thereby reducing the additional load on the glass ceiling element while maintaining the same installation space optimization.
3Volume of moving object
If a gearless multi-pole motor is used, then the drive unit becomes compact and can be mounted on the glass ceiling, but the motor must generate sufficient torque without mechanical gear multiplication
Solution Approach 1:
The patent optimizes the motor's electromagnetic parameters, specifically increasing the pole count to create a high-pole configuration. This parameter change enables the motor to generate high torque directly through electromagnetic forces without mechanical gear multiplication. The motor's torque constant and magnetic field strength are adjusted to compensate for the absence of gear amplification.
Solution Approach 2:
The patent enhances the local quality of the motor's magnetic circuit by using high-permeability magnetic materials and optimizing the magnetic path. This improves the motor's torque density, allowing a compact structure to generate sufficient driving force for the revolving door mechanism without requiring large dimensions.
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 solution enables a sleek, filigree glass ceiling design without the need for additional sealing and allows for easy integration into building facades, providing a compact and efficient drive system that maintains the aesthetic integrity of the revolving door.
Implementation Method 1
an electronically commutated multi-pole motor (10), with the multi-pole motor (10) being arranged on the glass ceiling element (12)
Data Source
Figure 1
Figure 2
AI summary
The carousel door (1) has a drive unit which is connected with a turnstile (11) of the carousel door. The drive unit is not provided with gear box. The electronically commutated pole motor (10) of the drive unit, is arranged at the glass ceiling element (12).