driving a linear motor?
mike56
Posts: 22
I have a linear motor that I want to control with the propeller.
I don't know much about it but I do currently have it under power with the controller that came with it.
The manufacturer isn't in business anymore but my manual says it is a brushless linear motor.
The drive signals seem to have 4 power inputs (a,b,c,d) and 5 sensor inputs.
I measured all combinations.·
I measured 9ohms between a-b, b-c, a-d but d seems disconnected.· Also all 5 sensor inputs are > 40Mohms.
I think that the a,b,c form a delta 3 phase motor from google searching.
Does anyone know what the 4th wire is for?·
3 phase motors seem to be usually "wye" configuration or "delta".· I think the 5 sensor inputs are hall effect sensor according to the product brochure but not sure why they all measure >40Mohm.
Anyone have an idea how to drive this thing?
·
I don't know much about it but I do currently have it under power with the controller that came with it.
The manufacturer isn't in business anymore but my manual says it is a brushless linear motor.
The drive signals seem to have 4 power inputs (a,b,c,d) and 5 sensor inputs.
I measured all combinations.·
I measured 9ohms between a-b, b-c, a-d but d seems disconnected.· Also all 5 sensor inputs are > 40Mohms.
I think that the a,b,c form a delta 3 phase motor from google searching.
Does anyone know what the 4th wire is for?·
3 phase motors seem to be usually "wye" configuration or "delta".· I think the 5 sensor inputs are hall effect sensor according to the product brochure but not sure why they all measure >40Mohm.
Anyone have an idea how to drive this thing?
·
Comments
First thing I would suggest is looking at the waveforms (drive and sensor) while the controller is running it. At least that way you have an idea of the voltages and phase timing.
First thing I would suggest is looking at the waveforms (drive and sensor) while the controller is running it. At least that way you have an idea of the voltages and phase timing.
The only connections I measured were 9 ohms between a,b,c and a,c which leads me to think it is a delta connection. Two other pins of the 9 pins measured around .7ohms resistance meaning they were connected together but these don't seem to be the bigger size so I assume that's gnd. However, if it were in wye 3 phase configuration I would assume you should measure two types of resistances between say (a,d) and (a,b).
I'll hook a scope up to it but I think the signals coming out might be kind of fast and it's at 40V so hope my 10x probe is good enough...