Beckhoff AM3011-0B00-0001 Brushless Servo Motor with Resolver Feedback

The Beckhoff AM3011 is a compact, cute little single stack 40mm flange brushless servo motor with resolver feedback. The circular connectors are almost as big as the motor. It's my only motor with a resolver; other unusual features for such a small motor include high pole count (6 poles; 4 poles is normal for this size) and high voltage (230V; most of my motors are <100V). The Beckhoff datasheet is ​here (PDF).

Motor Specifications

Mechanical Specifications

Parameter	Value	Unit
Poles	6
Standstill Torque	25.5	oz-in
Peak Torque	100	oz-in
Standstill Current	1.16	A
Peak Current	5.8	A
Operating Speed	8000	RPM
Rated Voltage	230	V
Rated Power	140	W
Motor Inertia	0.000241	oz-in-sec-sec
Weight	0.35	kg

Winding Constants

Parameter	Value	Unit
Torque Constant	22.7	oz-in/A
Kerms Voltage Constant	10.2	mVmin
Winding Resistance	18.2	Ohm
Winding Inductance	12.5	mH

Motor Connections

Power

Phase	Wire Color	Pin
U	BLU	1
V	BRN	4
W	VIO	3
Case Ground	Green	2

Resolver

I will update this section when I have tested the motor with a servo drive (I do have a B&R servo drive with resolver feedback).

Signal	Wire Color	Pin
Thermal Protection	Orange	2
S3 Cos REF	Blue	3
S4 Sine REF	Black	4
R2 Ref -	Black/White	5
Thermal Protection	Orange/White	6
S1 Cos +	Yellow	7
S2 Sine +	Red	8
R1 Ref +	Red/White	9