Motor Stator Rotor Dimensional Optimization for Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional motor designs do not optimally balance the dimensional ratio between the stator and rotor, leading to significant motor losses such as iron and copper losses during high-speed rotation.
Innovation Solution
A motor design featuring a stator with a yoke and protruding teeth, and a rotor with an outside diameter ratio to the stator of 0.3 or less, along with a yoke thickness ratio to the stator diameter of 0.1 to 0.15, optimizing the dimensional ratios to reduce motor losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the rotor outside diameter is reduced to 0.3 or less of the stator outside diameter, then copper loss is reduced during high-speed rotation, but the motor's power output may be reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the dimensional ratios between stator and rotor components. Specifically, it sets the rotor outside diameter to 0.3 or less of the stator outside diameter, and the yoke thickness to 0.1 to 0.15 of the stator outside diameter. These parameter optimizations reduce copper loss while maintaining adequate power output through precise dimensional control.
2Loss of energy
If the yoke thickness is optimized to 0.1 to 0.15 of the stator outside diameter, then iron loss is reduced during high-speed rotation, but the structural strength may be compromised
Solution Approach 1:
The patent optimizes the yoke thickness parameter to be 0.1 to 0.15 of the stator outside diameter. This parameter optimization reduces iron loss during high-speed rotation while maintaining sufficient structural strength through precise control of the thickness within this specific range, balancing energy efficiency and mechanical integrity.
3Loss of energy
If the dimensional ratio between stator and rotor is optimized, then motor efficiency is improved during high-speed rotation, but the design complexity increases
Solution Approach 1:
The patent simplifies the design complexity by establishing clear parameter relationships: rotor outside diameter ≤ 0.3 × stator outside diameter, and yoke thickness = 0.1 to 0.15 × stator outside diameter. These standardized parameter ratios provide a systematic approach to optimization, making the design process more manageable while achieving improved motor efficiency during high-speed rotation.
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 optimized design reduces motor losses and improves efficiency during high-speed rotation, with simulation results indicating a decrease in total loss and temperature rise, particularly when the yoke thickness is between 5 mm and 7 mm.
Implementation Method 1
a stator (2) and a rotor (3). The stator (2) has an annular yoke (2a), a plurality of teeth (2b), and a coil (2c)
Data Source
AI summary
A driving apparatus according to an embodiment includes an arm, an operation target, and a brake unit. The arm has one end supported by a support mechanism, and includes an electric driving source. The operation target is attached to the other end of the arm, the other end being an end on the opposite side of the one end, and is enabled to be pivoted by the driving source about one rotational axis intersecting with a direction from the one end to the other end. The brake unit secures immobility of a target gear that is a gear disposed in the arm, and that is a gear being rotated as the operation target is pivoted, when the power supply to the driving source stops.