Synchronous Motor Stator Segmentation for Vacuum Pump Load Adaptation
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Solution Overview
Problem
Vacuum pump motors face challenges in optimizing performance across varying load levels, leading to significant stator losses when adapted for high loads, and struggle to efficiently manage the transition between high and low load conditions.
Innovation Solution
A dry vacuum pump with a synchronous motor featuring two stators with windings that can be supplied individually or simultaneously, allowing the motor to adapt power based on pumping load, reducing stator losses and optimizing performance across different operating points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the motor is optimized for the highest load, then the motor can handle high pumping loads effectively, but significant ultimate vacuum pressure stator losses occur
Solution Approach 1:
The motor transitions from a static single-stator configuration to a dynamic multi-stator configuration where stators can be individually activated. This allows the motor to adapt its power output dynamically to match the actual pumping load, preventing excessive stator losses during low-load operation while maintaining sufficient power during high-load conditions.
Solution Approach 2:
The invention changes the operational parameters of the motor by enabling independent control of multiple stators. By adjusting which stators are active based on load conditions, the motor can optimize its performance parameters (power output and loss characteristics) to match the actual pumping requirements at any given moment.
2Power
If the motor is designed for high load capacity, then it can meet peak pumping demands, but it cannot efficiently manage low load conditions
Solution Approach 1:
The motor is segmented into multiple independent stators that can be individually controlled. This segmentation allows the motor to activate only the necessary number of stators based on the current pumping load, improving load adaptability while maintaining the capacity to handle peak demands when all stators are activated.
Solution Approach 2:
The motor achieves multi-functionality by being capable of operating in multiple power modes (single stator, multiple stators, or all stators active). This universal design allows the same motor structure to efficiently handle a wide range of pumping conditions from low to high load without requiring separate motor designs.
3Adaptability or versatility
If multiple stators are used to handle varying loads, then load adaptability improves, but device complexity increases
Solution Approach 1:
Multiple stators are merged into a single integrated motor structure sharing common components such as the rotor, housing, and control system. This combining approach maintains load adaptability through multiple active stators while reducing overall complexity compared to having separate motor units for different load conditions.
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 the motor to efficiently manage varying loads, reducing stator losses and improving response times, while maintaining a compact and cost-effective design by allowing simultaneous or individual winding supply based on load thresholds.
Implementation Method 1
a synchronous motor configured to rotate one of the shafts, the synchronous motor comprising: a rotor coupled to the shaft; and a first stator with windings arranged around the rotor
Data Source
AI summary
A dry vacuum pump is provided, including two shafts, respectively supporting at least one pumping rotor being configured to synchronously rotate in reverse in order to convey a gas to be pumped from an intake of the dry vacuum pump to an outlet; and a synchronous motor configured to rotate one shaft of the two shafts, the synchronous motor including a rotor coupled to the shaft, a first stator with windings arranged around the rotor, and at least one second stator with windings arranged around the rotor, the windings of the stators being configured to be supplied individually or simultaneously in order to adapt a power of the synchronous motor to a pumping load. A method for controlling a synchronous motor of a vacuum pump is also provided.