Brushless Motors

EC057C 57mm Brushless DC Motor

The EC057C series brushless DC motor is a high torque density model brushless motor in a NEMA 23 configuration. It is offered in 4 motor lengths with continuous torque from 0.078 - 0.28 Nm.

Features:

Speeds up to 12,000 RPM
DC bus voltage up to 76.4 Vdc
NEMA 23 configuration
Eight standard windings - Special windings available
4 Pole Rare Earth design

Videos:
NEW! Pittman Express Motor Calculator Tutorial
How Motor Curves are Created and How to Use Them
When should a gearbox be used in your DC motor application?

Specifications +

MOTOR DATA	Units	EC057C-1	EC057C-2	EC057C-3	EC057C-4
Max DC Terminal Voltage	V	90	90	90	90
Max Speed (Mechanical)	rpm	12000	12000	12000	12000
Continuous Stall Torque	Nm	0.078	0.14	0.22	0.28
Continuous Stall Torque	oz-in	11	20	31	40
Peak Torque (Maximum)	Nm	0.25	0.44	0.70	0.88
Peak Torque (Maximum)	oz-in	36	63	99	130
Rotor Inertia	kg m2	0.0000042	0.0000078	0.000011	0.000015
Rotor Inertia	oz-in-s2	0.0006	0.0011	0.0016	0.0021
Motor Weight	g	370	510	670	830
Motor Weight	oz	13	18	24	29

Dimensional Drawings +

Performance Curves +

EC057C-1 Speed Torque Performance Curve

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

EC057C-2 Speed Torque Performance Curve

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

EC057C-3 Speed Torque Performance Curve

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

EC057C-4 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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EC057C-1	Units
Rated Voltage	V	9.55	12.0	15.2	19.1	24.0	30.3	38.2	48.0
Rated Torque	Nm	0.071	0.070	0.069	0.068	0.068	0.067	0.067	0.067
Rated Torque	oz-in	10	9.9	9.7	9.6	9.6	9.5	9.5	9.5
Rated Speed	rpm	6290	6260	6590	6700	6540	6740	6820	6590
Rated Current	A	7.2	5.5	4.4	3.5	2.7	2.1	1.7	1.3
Rated Power	W	47	46	47	48	46	47	48	46
No Load Speed	rpm	7610	7360	7580	7630	7390	7580	7630	7380
No Load Current	A	0.62	0.48	0.39	0.31	0.24	0.20	0.16	0.12
Torque Constant	Nm/A	0.0117	0.0153	0.0188	0.0235	0.0305	0.0375	0.0470	0.0610
Torque Constant	oz-in/A	1.66	2.16	2.66	3.33	4.31	5.31	6.65	8.64
Voltage Constant	V/krpm	1.23	1.60	1.97	2.46	3.19	3.93	4.92	6.39
Terminal Resistance	Ω	0.220	0.330	0.480	0.73	1.16	1.77	2.76	4.5
Inductance	mH	0.24	0.41	0.62	0.97	1.64	2.48	3.87	6.54
Peak Current	A	25	19	15	12	9.6	7.8	6.3	4.8

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EC057C-2	Units
Rated Voltage	V	12.0	15.2	19.1	24.0	30.3	38.2	48.0	60.6
Rated Torque	Nm	0.13	0.13	0.13	0.13	0.13	0.13	0.13	0.13
Rated Torque	oz-in	19	18	18	18	18	18	18	18
Rated Speed	rpm	5690	5890	5780	5980	6090	5930	6070	6070
Rated Current	A	8.9	7.1	5.4	4.3	3.4	2.6	2.1	1.7
Rated Power	W	79	80	78	80	81	78	80	80
No Load Speed	rpm	6620	6730	6490	6630	6700	6500	6640	6690
No Load Current	A	0.54	0.44	0.34	0.27	0.22	0.17	0.14	0.11
Torque Constant	Nm/A	0.0171	0.0213	0.0278	0.0342	0.0427	0.0555	0.0683	0.0855
Torque Constant	oz-in/A	2.42	3.02	3.94	4.84	6.04	7.86	9.67	12.1
Voltage Constant	V/krpm	1.79	2.23	2.91	3.58	4.47	5.81	7.15	8.95
Terminal Resistance	Ω	0.190	0.280	0.430	0.630	0.970	1.56	2.39	3.84
Inductance	mH	0.28	0.44	0.74	1.13	1.76	2.97	4.51	7.40
Peak Current	A	30	24	18	15	12	9.3	7.5	6

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EC057C-3	Units
Rated Voltage	V	12.0	15.2	19.1	24.0	30.3	38.2	48.0	60.6
Rated Torque	Nm	0.21	0.21	0.20	0.20	0.20	0.20	0.19	0.19
Rated Torque	oz-in	30	29	29	28	28	28	28	27
Rated Speed	rpm	5940	6060	6340	6470	6360	6570	6630	6460
Rated Current	A	15	11	9.0	7.1	5.4	4.4	3.5	2.7
Rated Power	W	130	130	130	140	130	130	140	130
No Load Speed	rpm	7060	6900	7060	7100	6890	7070	7090	6880
No Load Current	A	0.74	0.57	0.47	0.37	0.29	0.23	0.19	0.15
Torque Constant	Nm/A	0.0160	0.0208	0.0256	0.0320	0.0416	0.0512	0.0641	0.0834
Torque Constant	oz-in/A	2.27	2.95	3.62	4.53	5.90	7.25	9.07	11.8
Voltage Constant	V/krpm	1.68	2.18	2.68	3.35	4.36	5.36	6.71	8.73
Terminal Resistance	Ω	0.120	0.170	0.240	0.350	0.540	0.810	1.24	2.00
Inductance	mH	0.17	0.28	0.42	0.66	1.12	1.69	2.64	4.46
Peak Current	A	48	39	30	25	19	15	12	9.3

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EC057C-4	Units
Rated Voltage	V	15.2	19.1	24.0	30.3	38.2	48.0	60.6	76.4
Rated Torque	Nm	0.27	0.26	0.26	0.26	0.25	0.25	0.25	0.25
Rated Torque	oz-in	38	37	37	36	36	36	35	35
Rated Speed	rpm	5870	5850	6110	6270	6120	6280	6360	6190
Rated Current	A	14	11	8.6	6.8	5.2	4.2	3.3	2.6
Rated Power	W	170	160	170	170	160	170	170	160
No Load Speed	rpm	6750	6510	6650	6730	6530	6660	6720	6540
No Load Current	A	0.66	0.50	0.41	0.33	0.26	0.21	0.17	0.13
Torque Constant	Nm/A	0.0213	0.0278	0.0342	0.0427	0.0555	0.0683	0.0855	0.111
Torque Constant	oz-in/A	3.02	3.94	4.84	6.04	7.86	9.67	12.1	15.7
Voltage Constant	V/krpm	2.23	2.91	3.58	4.47	5.81	7.15	8.95	11.6
Terminal Resistance	Ω	0.140	0.200	0.280	0.410	0.650	0.980	1.51	2.45
Inductance	mH	0.22	0.37	0.56	0.88	1.49	2.25	3.52	5.95
Peak Current	A	48	36	29	24	18	15	12	9.0

Wiring Diagram +

Color	Signal
Brown	Phase A
Red	Phase B
Orange	Phase C
Grey	Hall 1
Blue	Hall 2
White	Hall 3
Voilet	Hall +5 VDC
Black	Hall GND

Encoders +

E30C & E30D Encoder
The E30C & E30D optical incremental encoder was developed for volume OEM precision motion control applications and is the recommended encoder for the EC057C. The E30 offers a wide range of outputs, resolutions and connection solutions in a compact 30 mm by 8 mm size.

Features:

Resolutions from 200 to 2048
TTL Quadrature output
Frequency response to 220 kHz
Low power consumption, 5V @ 20mA max
Locking connector

Salient Characteristics

ENCODER DATA	SYMBOL	UNITS	E30C	E30D
Available Resolutions	-	-	200, 250, 256, 400, 500	500, 512, 1000, 1024, 2000, 2048
Output	-	-	2-Channel Quadrature	2-Channel Quadrature with Index
Output Interface	-	-	TTL Compatible	TTL Compatible
Supply Voltage	V_cc	VDC	4.5 to 5.5	4.5 to 5.5
Supply Current	I_cc	mA	20 max	20 max
High Level Output Voltage	V_OH	V	2.4 min	2.4 min
Low Level Output Voltage	V_OL	V	0.4 max	0.4 max
Max. Operating Frequency	f_max	kHz	40 (200-500 CPR)	55 (500-512 CPR)
				110 (1000-1024 CPR)
				220 (2000-2048 CPR)
Operating Temperature	θ_max	°C	-20 to +85	-20 to +85
Encoder Weight (Mass)	W_E	oz	0.2	0.2
Encoder Weight (Mass)	W_E	g	5.6	5.6

Dimensional Drawings

Connection Chart

PIN	COLOR	E30C	E30D	E30C¹	E30D¹
1	Black	Encoder Ground		Encoder Ground
2	White	V_cc		V_cc
3	Green/White	-		-	Index I̅
4	-	-		-
5	Blue/White	-		Channel A̅
6	Blue	Channel A		Channel A
7	Violet	Channel B		Channel B
8	Violet/White	-		Channel B̅
9	Green	-	Index	-	Index
10	Green/Yellow	Motor Ground		Motor Ground
E30C¹ & E30D¹: Optional Differential LD connections shown in grey

Recommended Encoder Data Sheets
E30C/D Encoder Data Sheet pdf

Gearboxes +

PLG52 Gearbox
The PLG52 is a 52 mm planetary gearbox suitable for servo applications where DC Servo brush or BLDC motor technology is specified. The PLG52 provides excellent efficiency in a compact and industry compatible output configuration.

Features:

Maximum Load torque up to 24 Nm
All steel gearing for high torque capacity
Dual ball bearings on output shaft to withstand high loads
High efficiency

Specifications

GEAR DATA	UNITS	PLG52	PLG52	PLG52	PLG52	PLG52	PLG52	PLG52
GEAR DATA	UNITS	4.5:1	6.25:1	15:1	20.2:1	28.1:1	36:1	50:1
Maximum Load	Nm	1.2	1.2	8	8	8	8	8
Maximum Load	oz-in	170	170	1133	1133	1133	1133	1133
Weight (Mass)	g	560	560	720	720	720	720	720
Weight (Mass)	oz	19.8	19.8	25.4	25.4	25.4	25.4	25.4
Lengtd (L_G)	mm	50.0	50.0	65.5	65.5	65.5	65.5	65.5
Lengtd (L_G)	in	1.97	1.97	2.58	2.58	2.58	2.58	2.58
Stages	-	1	1	2	2	2	2	2
Ratio	-	4.5/1	6.25/1	15/1	20.25/1	28.12/1	36/1	50/1
Efficiency	-	0.90	0.90	0.81	0.81	0.81	0.81	0.81
Shaft Rotation	-	CW	CW	CW	CW	CW	CW	CW

GEAR DATA	UNITS	PLG52	PLG52	PLG52	PLG52	PLG52	PLG52
GEAR DATA	UNITS	91.1:1	126.5:1	162:1	225:1	288:1	400:1
Maximum Load	Nm	24	24	24	24	24	24
Maximum Load	oz-in	3399	3399	3399	3399	3399	3399
Weight (Mass)	g	880	880	880	880	880	880
Weight (Mass)	oz	31.0	31.0	31.0	31.0	31.0	31.0
Lengtd (L_G)	mm	80.5	80.5	80.5	80.5	80.5	80.5
Lengtd (L_G)	in	3.17	3.17	3.17	3.17	3.17	3.17
Stages	-	3	3	3	3	3	3
Ratio	-	91.12/1	126.5/1	162/1	225/1	288/1	400/1
Efficiency	-	0.73	0.73	0.73	0.73	0.73	0.73
Shaft Rotation	-	CW	CW	CW	CW	CW	CW

Dimensional Drawings

Combined Length

PLG52 Gearmotor
Motor	Length L_GM mm
Stage	1	2	3
EC057C-1	88.2	103.7	118.7
EC057C-2	99.6	115.1	130.1
EC057C-3	112.3	127.8	142.8
EC057C-4	125.0	140.5	155.5

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

Brushless Motors

EC057C 57mm Brushless DC Motor

Specifications +

Dimensional Drawings +

Performance Curves +

Winding Performance Data +

Wiring Diagram +

Encoders +

Gearboxes +

Brakes +

Drives +