Are you talking abut brushless DC motors like these: **broken link removed**
There are several other vendors/brands/manufactturers. I think Neu makes most of their own motors. With other brands it is a little hard to tell sometimes what is made and what is just branded. Neu makes good motors and was simply a link I had. You can certainly find other, cheaper brands that will function well.
Hobby King would be one place to look for cheaper units. It is based in Hong Kong, but now has limited distribution centers in several countries, including the US. Outside the hobby arena, I suspect industrial motors will get quite expensive.
no, not brushless DC motors, which are PM ...close though...I need PM SYNCHRONOUS motors
any other vendors?
even European companies are fine, I just want to hear what's out there other than Chinese companies.
For instance, Lucas-Nulle are a European vendor, but their motors are tailored to academic lab settings it seems, not for something you would use in a product.
I am not sure I understand the distinction you are making. The brushless motors I mention are also sensorless. There are 3 lines in and reversing any two lines causes the rotation to reverse.
I am not sure I understand the distinction you are making. The brushless motors I mention are also sensorless. There are 3 lines in and reversing any two lines causes the rotation to reverse.
Synchronous motors lock in on the frequency of the power plant generator so they run at the exact same frequency of the 60 Hz generator no sensors are needed.
As an attorney might say, that is a distinction without a difference. The waveform used for a sensorless, 3-phase BLDC is more out of convenience than necessity.
Sounds like what you are looking for is a common PM stator or excited stator type three phase motor and again they are most often can be found listed as stepper motors, servo motors, or BLDC motors.
How they are driven does not matter. Sine wave or square wave, one phase at a time or multiple phases at a time the motors themselves all work basically the same.