Dual-Motor Elevator Drive with Radial Magnetic Field
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Solution Overview
Problem
Existing dual-motor drive apparatuses for elevators with large load capacities are bulky, complex, and costly due to the need for large motors and axial magnetic fields, complicating assembly and increasing production and maintenance challenges.
Innovation Solution
A miniaturized dual-motor drive apparatus with a cylindrical structure using a radial magnetic field and helical gears, where the traction sheave is positioned between the two motors, allowing for efficient torque transmission and reducing the need for axial magnetic field adjustments, thus simplifying assembly and reducing space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a dual-motor drive apparatus with axial magnetic field is used to output large torque, then the lifting force requirement is satisfied, but the drive apparatus size becomes large and assembly complexity increases
Solution Approach 1:
The patent changes the magnetic field configuration parameter from axial magnetic field to radial magnetic field. This parameter change enables the motor to achieve the same torque output with a more compact structure, eliminating the need for complex adjustment apparatus and reducing assembly complexity while maintaining the large torque capability required for heavy load elevation
2Power
If a dual-motor drive apparatus with axial magnetic field is used to output large torque, then the lifting force requirement is satisfied, but the occupied space increases
Solution Approach 1:
By changing the magnetic field configuration from axial to radial, the motor achieves a more compact cylindrical structure. This parameter change significantly reduces the occupied space of the drive apparatus while maintaining the large torque output capability, making it suitable for installations with limited space
3Power
If a dual-motor drive apparatus with axial magnetic field is used to output large torque, then the lifting force requirement is satisfied, but production cost increases
Solution Approach 1:
The patent changes the magnetic field configuration parameter from axial to radial, which simplifies the motor structure and eliminates the need for complex adjustment apparatus. This parameter change reduces manufacturing complexity, lowers production costs, and improves ease of manufacture while maintaining the large torque output capability
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 miniaturized dual-motor drive apparatus effectively outputs large torque while reducing space requirements, simplifying assembly, and lowering production costs, facilitating easier transfer, installation, and maintenance, while ensuring the traction rope's service life and lifting capacity.
Implementation Method 1
the motor uses a cylindrical structure with a radial magnetic field
Implementation Method 2
Transform Electrical Energy to Mechanical Energy
Implementation Method 3
helical gears, where the traction sheave is positioned between the two motors
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An elevator pulled by a dual-motor drive device, comprising: a ascent and descent space (1001); a cage (1002) and a counterpoise (1003) that ascend and descend in the ascent and descent space (1001); a traction rope (1104) that suspends the cage (1002) and the counterpoise (1003); a first motor drive device (1); and a second motor drive device (2001). The first motor drive device (1) is provided with a first motor (10) and a first gear assembly (2); the second motor drive device (2001) is provided with a second motor (2010) and a second gear assembly (2002); in the axial direction of a traction rope wheel (30), the traction rope wheel (30) is located between the first motor drive device (1) and the second motor drive device (2001); torque generated by the first motor (10) of the first motor drive device (1) and torque generated by the second motor (2010) of the second motor drive device (2001) are transmitted to the traction rope wheel (30) by means of the first gear assembly (2) and the second gear assembly (2002) respectively, so as to drive the traction rope wheel (30) to rotate. The dual-motor drive device can be used for outputting high torque so as to increase the traction force of the traction rope, and thus may meet the demand for expanding an application scenario of a heavy-load elevator.