Design and Fabrication of Pseudo Direct Drive

  Pseudo Direct Drive (PDD) is a variant of Brush-less DC Motor. PDD is a Permanent Magnet Machine that has an incorporated magnetic gear box. This drive uses magnetic gears with Pole-pieces between the inner and outer rotor. The outer rotor stays s

Project Title

Design and Fabrication of Pseudo Direct Drive

Project Area of Specialization

Mechanical Engineering

Project Summary

Pseudo Direct Drive (PDD) is a variant of Brush-less DC Motor. PDD is a Permanent Magnet Machine that has an incorporated magnetic gear box. This drive uses magnetic gears with Pole-pieces between the inner and outer rotor. The outer rotor stays static while the inner rotor rotates beacause of the current provided to the stator and the Magnetic Field of the inner and outer rotor interacts to rotate the Pole-pieces rortor. This combination can achieve high torque density and can alleviate problems related to mechanical gear box. PDD is also known as Magnometics revolutionary high torque magnetic gear.

Pseudo Direct Drive (PDD) offers a significant advance over conventional permamnent magnet technology, achieving a step change in continuous torque density compared to that of equivalently cooled Permanent Magnet Machines while maintaing a very high efficiency. This increase in torque allows the motor to directly drive may loads where conventionally a motor and gear box combination would be employed. This PDD is a comibation of mechanical and magnetic arrangement of the magnetic gear.

Project Objectives

• Compact Design with High Torque Density
• Elimination of gear box
• Low maintenance and lubrication
• Enhancement of the Efficiency 

Project Implementation Method

• Literature Review
• Market Survey
• 3D Modelling & Design Process
• Mathematical Modelling
• Fabrication

Benefits of the Project

• Have a high Continuous Torque
• Reduction in Energy looses 
• Greater Efficiency
• Low maintenance  

Technical Details of Final Deliverable

Elecric motor is needed to change it into Pseudo Direct Drive. Three rings of PDD i.e. middle ring , outer ring & inner ring will be adjusted inside that motor for the smooth working of magnetic gears.

A 3D printed Steel bar casing (middle ring) is required for the steel bars to be adjusted & a shaft would be designed for the inner ring to work.

Equipments needed:

1. Small Electric Motor (12-15 V)
2. NEODYMIUM Curved Magnets ( 4-6 pieces)
3. NEODYMIUM Bar Magnets ( 20-27) 
4. Steel Bars (17-23)
5. 3D printed casing for steel Bars
6. Bearings
7. Shaft

Final Deliverable of the Project

Hardware System

Core Industry

Manufacturing

Other Industries

Core Technology

Others

Other Technologies

Sustainable Development Goals

Required Resources

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