How to connect sensors in the 3-phase motors?

 

 

Ans: Here for the star connection ( KM3,KM1) must be activated and this connection for high speed application. for the delta connection (KM3,KM2) must be activated and this connection for high torque application.

 

In more detail, the general procedure is: Begin with the motor connected with a known Hall sensor combination and labeled phase connections (e.g.
UVW on controller, ABC on motor, connected UA, VB, WC), and one sensor aligned with the middle of a slot (gap between2 stator teeth) Attempt to run the motor.
If no continuous commutation is observed, perform the following steps: Swap two phase wires, keeping one unique from the previous swap (if it is the first swap, pick any two).
Keep track of which ones you swapped! Attempt to run the motor.
If no continuous commutation is observed, return to Step A.
There are six possible combinations to try: UA, VB, WC UA, VC, WB UB, VC, WA UC, VB, WA UC, VA, WB UB, VA, WC If still no rotation is observed, swap2 Hall sensor signals and return to Step2.
If rotation is observed and is the correct direction, go to step7.
If rotation is observed and is the opposite direction, cyclically shift all phase wires and attempt to run the motor (e.g.
UA,VB,WC becomes UC,VA,WB).
At least one cyclic shift within2 attempts will be the reverse direction (The3rd shift, of course, will result in the original combination!) Using an ammeter to read the phase current (AC ammeter) or Battery side current (DC ammeter), slightly shift the sensor board in either direction in its mounting slots to find the region of lowest current draw for a given motor speed.
This is the point of optimal timing for that speed.
The speed you select should be dependent on the need for low end start-up stability vs.
high speed efficient operation.