Recent content by dpenney

Hi nbucska, It seems like a stepper motor would be more expensive than an AC induction motor? As far as specs, the project, and myself: I require a motor that can provide irregular variable speed and reversal for a consumer application, at 1/4HP (initially, and then up to 3HP in later versions...

Hi Barry1961, I don't think that a brush motor is appropriate for my app, but thank you for the suggestion. After some modification of my original design, I think I will be OK with the expected quantity costs of AC induction motors. We'll see...

Hi shogsgurra, thank you for the excellent lessons learned list. Especially useful is #6 in answering many questions for me. Regarding #8, power savings is not a critical concern, I believe regen (or dynamic braking, or something similar) is required in order to prevent excessive heat...

I had hit Bodine before (www.bodine-electric.com) but they didn't have prices on the web, so I moved on since I guessed that meant too expensive. Based on your recommendation, I just sent in the request for info. I checked out Oriental (expensive) and Franklin (outrageous!). I expect you are...

Hi jraef, thank you for your response. >>Who have you gone to so far? I basically just typed "electric motor," induction motor," etc., into search engines and clicked on many of the resulting links. Baldor and Leeson were two that come to mind since their motors were carried by many...

I am developing a prototype for what I hope to be an OEM application that involves motion control with constant reversing and variable speed (only about 1/4HP required). I definitely want to use an electric motor (as opposed to pnuematic, hydraulic, etc.) and it seems like a 3-phase induction...

Thanks all, you've been very helpful.

Yes, it will require holding torque. However, I had hoped that the brushless motors in my app could perform similarly to a variable speed power hand drill. I understand a drill usually uses a brushed (Universal) motor and it seems to have adequate holding torque (light trigger press will hold...

The app is similar to an animatronic display (like the dinasour types, but much faster moving) that is interactive. So there may be slow movement in one direction, but then an abrupt reverse and/or speed increase (or fast movement and speed decrease), in response to some stimulus. Several...

Thanks for your reply. Can you elaborate on why DC is better for this than 3-phase AC (both are brushless)? Obviously, I would prefer to get by with 3-phase AC if it were possible, for the lower cost.

I am developing a robotic app which requires quick changes in direction and speed. For reliability, I want to avoid brushes and so it seems my choice is either 3-phase induction (squirrel cage) or brushless DC. The app will require approximately 3/4hp & 0-2400rpm. My power will be wall current...