Integrated CT Gantry Drive for Contactless Power Transmission
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Solution Overview
Problem
Conventional gantry drives for computed tomography systems require separate systems for mechanical and electrical power transmission, occupying significant installation space and incurring maintenance costs due to friction and wear, particularly during acceleration phases.
Innovation Solution
A gantry drive system incorporating a three-phase stator and rotor that integrates both mechanical drive power and electrical supply power, utilizing rotating field power to eliminate the need for separate power transmission systems, reducing installation space and maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate mechanical and electrical power transmission systems are used in conventional gantry drives, then reliable power transmission is achieved, but installation space increases and maintenance costs increase due to friction and wear
Solution Approach 1:
The patent combines the mechanical drive function and electrical power transmission function into a single integrated system. The motor assembly serves dual purposes: generating mechanical torque to rotate the support ring and simultaneously transmitting electrical power to the payload through its windings and magnetic core, eliminating the need for separate transmission systems
Solution Approach 2:
The motor assembly is designed as a multi-functional component that performs both mechanical drive and electrical power transmission. The stator and rotor structures serve dual roles in both functions, making the system more space-efficient by having one component perform multiple tasks
2Reliability
If separate mechanical and electrical power transmission systems are used in conventional gantry drives, then functional requirements are met, but maintenance costs increase due to friction and wear
Solution Approach 1:
By merging the mechanical and electrical transmission systems into one integrated motor assembly, the patent reduces the number of separate components that require maintenance. The unified structure eliminates friction-based mechanical contacts and wear-prone interfaces between separate systems
Solution Approach 2:
The patent replaces traditional mechanical power transmission mechanisms (gears, belts, shafts) with a direct-drive motor system. This substitution eliminates friction and wear associated with mechanical contacts, significantly reducing maintenance requirements
3Use of energy by moving object
If contact-based power transformers are used in conventional gantry drives, then electrical power is transmitted to the rotating payload, but friction and wear occur reducing system efficiency
Solution Approach 1:
The patent replaces contact-based electrical power transmission (slip rings and brushes) with a contactless electromagnetic induction system. The motor windings and magnetic core create rotating magnetic fields that induce currents in the rotor, transmitting power without physical contact and eliminating associated friction and wear losses
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 integrated gantry drive achieves faster acceleration times, reduced maintenance, and increased power efficiency, allowing for high-speed rotational movements with minimal space requirements, and eliminates the need for contact-based power transformers.
Implementation Method 1
the three-phase stator and the three-phase rotor form a three-phase motor for providing a rotating field power
Implementation Method 2
by means of the rotating field power, on the one hand, in the form of a first portion, a mechanical drive power for generating a rotary movement of the three-phase rotor and, on the other hand, in the form of a second portion, an electrical supply power of a payload device can be provided
Data Source
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AI summary
The invention relates to a gantry drive, a computed tomography device, a method for generating a rotary motion of a three-phase rotor by means of a gantry drive, and an associated computer program. The gantry drive according to the invention comprises: a three-phase stator, a three-phase rotor, a tunnel-shaped cavity for accommodating a patient, and a control unit, wherein the three-phase rotor spatially surrounds the cavity; wherein the three-phase stator and the three-phase rotor form a three-phase motor for generating rotating field power; wherein, by means of the rotating field power, on the one hand, in the form of a first component, a mechanical drive power for generating a rotary motion of the three-phase rotor and, on the other hand, in the form of a second component, an electrical supply power for a payload device can be provided; and wherein the control unit is configured to vary the first component and/or the second component.