Brushless Motors

EC057A 57mm Brushless DC Motor

The EC057A series brushless DC motor is a high torque model brushless motor designed in a NEMA 23 package. It is offered in 3 motor lengths with continuous torque from 0.38 - 0.93 Nm.

Features:

Speeds up to 6,000 RPM possible
DC bus voltage up to 170 Vdc
NEMA 23 configuration
Six standard windings
4 Pole Rare Earth design

Videos:
NEW! Pittman Express Motor Calculator Tutorial
How Motor Curves are Created and How to Use Them
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Specifications +

MOTOR DATA	Units	EC057A-1	EC057A-2	EC057A-3
Max DC Terminal Voltage	V	170	170	170
Max Speed (Mechanical)	rpm	6000	6000	6000
Continuous Stall Torque	Nm	0.39	0.71	0.94
Continuous Stall Torque	oz-in	55	100	130
Peak Torque (Maximum)	Nm	1.2	2.2	2.9
Peak Torque (Maximum)	oz-in	170	310	410
Rotor Inertia	kg m2	0.000013	0.000026	0.000039
Rotor Inertia	oz-in-s2	0.0019	0.0037	0.0055
Motor Weight	g	660	1000	1400
Motor Weight	oz	23	36	48

Dimensional Drawings +

Performance Curves +

EC057A-1 Speed Torque Performance Curve

S.O.A.C. = Safe Operating Area for Continuous duty

EC057A-2 Speed Torque Performance Curve

S.O.A.C. = Safe Operating Area for Continuous duty

EC057A-3 Speed Torque Performance Curve

S.O.A.C. = Safe Operating Area for Continuous duty

NOTE: All values specified at 25°C ambient temperature. Peak values are theoretical and for reference only.

Winding Performance Data +

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EC057A-1	Units
Rated Voltage	V	38.0	48.0	60.0	76.0	76.0	152	152
Rated Torque	Nm	0.32	0.34	0.34	0.33	0.34	0.33	0.34
Rated Torque	oz-in	46	48	48	46	48	46	48
Rated Speed	rpm	6000	6000	6000	6000	6000	6000	6000
Rated Current	A	9.6	7.4	5.9	4.8	3.7	2.4	2.4
Rated Power	W	200	210	210	210	210	210	210
No Load Speed	rpm	6000	6000	6000	6000	6000	6000	6000
No Load Current	A	0.51	0.38	0.31	0.26	0.19	0.13	0.13
Torque Constant	Nm/A	0.0401	0.0535	0.0668	0.0802	0.107	0.160	0.167
Torque Constant	oz-in/A	5.68	7.57	9.47	11.4	15.1	22.7	23.7
Voltage Constant	V/krpm	4.20	5.60	7.00	8.40	11.2	16.8	17.5
Terminal Resistance	Ω	0.310	0.520	0.820	1.23	2.09	4.91	5.12
Inductance	mH	0.22	0.40	0.62	0.90	1.60	3.60	3.90
Peak Current	A	33	26	20	17	13	8.4	8.1

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EC057A-2	Units
Rated Voltage	V	48.0	60.0	76.0	121	152	152	170
Rated Torque	Nm	0.53	0.52	0.54	0.53	0.53	0.53	0.53
Rated Torque	oz-in	75	73	77	75	74	75	75
Rated Speed	rpm	6000	6000	6000	6000	6000	6000	6000
Rated Current	A	12	9.3	6.9	4.7	3.6	3.0	2.4
Rated Power	W	330	330	340	330	330	330	330
No Load Speed	rpm	6000	6000	6000	6000	6000	6000	6000
No Load Current	A	0.72	0.58	0.41	0.29	0.23	0.18	0.15
Torque Constant	Nm/A	0.0535	0.0668	0.0936	0.134	0.174	0.214	0.267
Torque Constant	oz-in/A	7.57	9.47	13.3	18.9	24.6	30.3	37.9
Voltage Constant	V/krpm	5.60	7.00	9.80	14.0	18.2	22.4	28.0
Terminal Resistance	Ω	0.190	0.290	0.540	1.16	1.96	2.96	4.64
Inductance	mH	0.17	0.26	0.52	1.07	1.80	2.73	4.28
Peak Current	A	45	36	27	18	14	11	9.3

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EC057A-3	Units
Rated Voltage	V	48.0	60.0	76.0	76.0	152	152
Rated Torque	Nm	0.51	0.50	0.50	0.50	0.51	0.71
Rated Torque	oz-in	72	70	71	71	72	100
Rated Speed	rpm	6000	6000	6000	6000	6000	4570
Rated Current	A	11	7.9	6.4	5.3	3.2	2.7
Rated Power	W	320	310	310	320	320	340
No Load Speed	rpm	6000	6000	6000	6000	6000	4500
No Load Current	A	1.2	0.84	0.67	0.56	0.34	0.17
Torque Constant	Nm/A	0.0602	0.0802	0.100	0.120	0.201	0.321
Torque Constant	oz-in/A	8.52	11.4	14.2	17.0	28.4	45.4
Voltage Constant	V/krpm	6.30	8.40	10.5	12.6	21	33.6
Terminal Resistance	Ω	0.150	0.260	0.410	0.590	1.56	3.92
Inductance	mH	0.13	0.24	0.37	0.54	1.50	3.84
Peak Current	A	54	39	33	27	17	11

Wiring Diagram +

Color	Signal
Red (20 AWG)	Phase R
White	Phase S
Blue	Phase T
Brown	Hall 1
Orange	Hall 2
Yellow	Hall 3
Red (22 AWG)	Hall +5-15 VDC
Black	Hall GND

Encoders +

Q Encoder
The Q & V high performance incremental encoders are transmissive devices with integrated bearing and isolating spring mount. The encoders are identical except for the mounting spring is configured for different motors.

Features:

Resolutions from 1000 to 5000
Differential line driver is standard
Frequency response to 500 kHz
Rugged mechanical design
Good for higher temperature
Shielded cable

Specifications

ENCODER DATA	SYMBOL	UNITS	Q1, Q3, Q5, Q8
Available Resolutions	-	-	1000, 2000, 2500, 5000
Output	-	-	2-Channel Quadrature with index
Output Interface	-	-	TTL Compatible
Supply Voltage	V_cc	VDC	4.75 to 5.25
Supply Current	I_cc	mA	125 max
Max. Operating Frequency	f_max	kHz	500
Operating Temperature	θ_max	°C	-20 to +100

Dimensional Drawings

Connection Chart

PIN	COLOR	Q
1	Red	V_cc
2	Black	Encoder Ground
3	Brown	Channel A
4	White	Channel A̅
5	Blue	Channel B
6	Green	Channel B̅
7	Orange	Index I
8	Yellow	Index I̅
N/C	Black / White	Case Ground
N/C	Drain Wire	Cable Shield

Recommended Encoder Data Sheets
Q Encoder Data Sheet pdf

Brakes +

B49A Brake
The B49A power off, fail safe holding brake is designed to hold a load in position when power is removed from the motor and brake. This compact 49mm brake has a holding torque of 0.339 Nm (3 Lb-in). The B49A is typically mounted to the motor rear.

Features:

Holding torque of 0.339 Nm
Factory-set Air Gap
Multiple Compression Springs
Rigid molded friction disc
Square Drive Nut with Set Screw

Salient Characteristics

BRAKE DATA	UNITS	12V	24V
Applied Voltage	Vdc	12	24
Holding Torque	Nm	0.339	0.339
Holding Torque	lb-in	3.0	3.0
Current	A	0.353	0.190
Resistance	Ohms	34	132
Inertia	Kg-m²	4.94E-6	4.94E-6
Inertia	oz-in-sec²	7.00E-4	7.00E-4
Weight (Mass)	kg	0.085	0.085
Weight (Mass)	Lbs	0.19	0.19

Dimensional Drawings

Recommended Brake Data Sheet
B49A Brake Data Sheet pdf

Drives +

Recommended Drives
BGE6050

Alternate Drives
BGE6010