×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Reversing a 3 phase Synchronous Interior Permanent Magnet Motor

Reversing a 3 phase Synchronous Interior Permanent Magnet Motor

Reversing a 3 phase Synchronous Interior Permanent Magnet Motor

(OP)
Hi,
I need to reverse the rotation of a synchronous permanent magnet motor. We do not have control of the DC to AC (PWM) inverter so cannot simply select reverse in software. As such we would like to attempt to wire the motor and sensors 'backwards' to achieve reverse. The motor is designed to run both forwards and backwards.
The inverter uses 6 IGBTs in 3 half bridges and creates a pseudo sine wave using PWM.
The inverter monitors the current draw on each phase and uses a 6 wire resolver to give rotational speed and angle.

We have the ability to;
re-order the phases to the motor.
re-order the 6 firing signals to the inverters IGBT drivers.
Re-wire the resolver or mechanically flip the resolver.
re-order the current sensors.

Three phase systems are defiantly not my area... But is there any reason why we cannot simply reverse parts of the wiring and sensors to make the inverter believe it is running the motor normally but it is in fact revolving backwards?
This is an odd project and we have very few options, changing the inverter or reprogramming it are not possible on this project.

Any help or advice very much appreciated.... if all goes well I will be able to tell you in which publicity stunt this was used.
Regards, John.

RE: Reversing a 3 phase Synchronous Interior Permanent Magnet Motor

You might have more replies if you repost this in the Electrical/Electronic Engineers Forum in the Electric Motors... catagory.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - Strategies to Secure Connected Cars with Firewalls
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close