Hi All,

I just bought a new electric Brushless Sensorless Motor (no controller) from Astroflight. When I hooked it up to a fully charged 7.2V NiCad battery to test it, all it did was stutter. Is there something special about these RC motors to getting them started? Yes, I am completely new at this, so any help would greatly be appreciated.

A brushless motor is not a DC motor it is a 3-phase motor. It will not run without a brushless controller to produce the 3-phase power it requires.

I do hope you haven't destroyed it but I've never tried doing that so I don't know. Didn't the fact that the motor has 3 wires and a battery only has 2 make you think something might be different ?

Steve

I figured the third wire was a remote auxillary wire.

So when I do get a brushless controller, can I set it to run as though it were a DC motor? For Example, I pop a switch...motor runs at full throttle.

no the brushless controllers need the throttle stick signal to work

So there's no way to send a constant frequency matching that of the controll signal to the brushless controller?

If no one knows of a way, I've got an Astroflight Sensorless Brushless 05 Racing Motor (806RM) for sale.

most esc's for brushless motors at least modern ones need a signal from the transmiter for the idle position (off) and the full up position (on/fullpower) so unless you can simulate the diference between the signal of idle and the signal of full throttle your stuck

This circuit will simulate the output from a receiver.

http://www.uoguelph.ca/~antoon/circ/archive/servo4.htm

There are many more variations. Just google for "servo driver"

Thanks for A LOT for the help guys. I really appreciate it.

Are all servo drivers the same? Is there a difference between the servo driver for a dc, brush, and brushless motor?

The servo driver I mentioned is to drive the speed control.

You would need a brushless motor controller. These are usually plugged into the RC receiver.

The servo driver circuits simulate the output signal of a RC receiver.

BTW, what are you trying to do with the motor?