Eddy Current Vehicle Drive for Roller Coaster Lift Hill
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Solution Overview
Problem
Conventional chain lifts for amusement park rides, such as roller coasters, experience mechanical wear, high passenger impact loads, variability in forces, and increased maintenance costs due to direct contact between the vehicle and the drive system, limiting efficiency and throughput.
Innovation Solution
An eddy current vehicle drive system that generates a non-contact driving force using an eddy current generator with a vehicle-mounted magnet and support-mounted conductor, allowing the vehicle to move along a track without physical engagement, reducing wear and enabling variable vehicle velocities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If chain lifts are used to drive vehicles up the track, then the vehicle can be moved uphill, but mechanical wear occurs due to direct contact between the vehicle and chain
Solution Approach 1:
The patent replaces the mechanical chain lift system with an electromagnetic propulsion system. The vehicle contains a motor that interacts with a track-mounted guide rail through magnetic or electrostatic fields, eliminating direct mechanical contact between the vehicle and drive mechanism. This substitution of mechanical contact with electromagnetic interaction resolves the wear problem while maintaining uphill transport capability.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the vehicle and the track. The guide rail serves as a non-contact interface that transmits propulsion force through electromagnetic interaction rather than mechanical contact. This intermediary approach allows force transmission without the friction and wear associated with direct mechanical contact.
2Force
If chain lifts physically catch vehicles, then the vehicle can be engaged for lifting, but high passenger impact loads occur during transitions
Solution Approach 1:
The patent replaces the mechanical catching mechanism with electromagnetic propulsion. Instead of physically engaging the vehicle with a chain or hook that causes impact during engagement and disengagement, the electromagnetic system provides continuous smooth force application. The motor-driven vehicle accelerates gradually along the track, eliminating sudden impact loads on passengers during transitions.
Solution Approach 2:
The patent employs dynamic electromagnetic control to adjust propulsion force continuously. The electromagnetic drive system can modulate the force applied to the vehicle in real-time, providing smooth acceleration and deceleration profiles that minimize impact loads on passengers. This dynamic control replaces the static mechanical engagement of chain lifts.
3Speed
If chain drives are used, then vehicles can be moved along the track, but variability in forces requires over-design increasing costs
Solution Approach 1:
The patent replaces the variable-force mechanical chain drive with a precisely controllable electromagnetic propulsion system. The electromagnetic motor in the vehicle can be controlled to deliver consistent, predictable force along the track. This eliminates the force variability inherent in mechanical chain systems where slack, tension, and engagement variations create unpredictable loads, thereby reducing the need for over-design.
Solution Approach 2:
The patent incorporates feedback control in the electromagnetic propulsion system. Sensors monitor vehicle position, speed, and force application, allowing the control system to adjust electromagnetic field strength in real-time to maintain consistent propulsion forces. This feedback mechanism eliminates the force variability that plagues mechanical chain drives and reduces the need for conservative over-design.
4Speed
If chain lifts mechanically link vehicles, then all vehicles travel at one speed, but this removes flexibility for loading inefficiencies
Solution Approach 1:
The patent employs dynamic electromagnetic control that allows each vehicle to operate independently at its own optimal speed. The electromagnetic propulsion system can adjust the speed and acceleration of each vehicle based on loading conditions, track conditions, and operational requirements. This dynamic speed control replaces the uniform speed constraint of mechanical chain lifts, enabling flexible adjustment to maximize throughput and accommodate loading inefficiencies.
Solution Approach 2:
The patent segments the propulsion system so that each vehicle has its own independent electromagnetic motor and control system. This segmentation allows each vehicle to be controlled independently rather than being mechanically coupled to a single chain speed. Vehicles can accelerate, decelerate, or pause independently based on their specific operational needs, thereby improving overall system productivity and flexibility.
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 eddy current vehicle drive system eliminates mechanical wear, minimizes passenger impact, and allows for variable vehicle speeds, reducing maintenance costs and increasing ride efficiency and throughput by applying a non-contact driving force.
Implementation Method 1
an eddy current generator that generates an eddy current to apply a non-contact driving force on the vehicle body
Data Source
AI summary
A ride that includes an eddy current vehicle drive, and the ride may take the form of a roller coaster with a lift hill. The eddy current vehicle drive includes an eddy current generator with a vehicle-mounted element and a support-mounted element. The “support” in this ride may be a chain similar to a chain lift system's chain with its drive components. The eddy current vehicle drive may use equipment that is similar to a traditional roller coaster chain lift. The chain has a support-mounted element of the eddy current generator (such as a set of conductor fins) mounted on each link of the chain to form a continuous or nearly-continuous (with small gaps between adjacent pairs of the plates) conductor that extends vertically from the chain. The vehicle's body has a magnet or magnet array to provide the vehicle-mounted element (portion or half) of the eddy current generator.