Brushless Motors

EC044A 44mm Brushless DC Motor

The EC044A series brushless motor is a medium torque density 4 pole model designed as an economical upgrade to brushed motors. The EC044A is an excellent choice for both power transmission and precision motion control applications. It is offered in 3 motor lengths with continuous torque from 0.043 - 0.081 Nm in a 44 mm diameter.

Features:

Speeds up to 15,000 RPM possible
DC bus voltage up to 48 Vdc
Metric mounting
Eight standard windings - Special windings available

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	EC044A-1	EC044A-2	EC044A-3
Max DC Terminal Voltage	V	48	48	48
Max Speed (Mechanical)	rpm	15000	15000	15000
Continuous Stall Torque	Nm	0.044	0.067	0.082
Continuous Stall Torque	oz-in	6.2	9.5	12
Peak Torque (Maximum)	Nm	0.20	0.36	0.45
Peak Torque (Maximum)	oz-in	29	51	64
Rotor Inertia	kg m2	0.0000021	0.000003	0.000004
Rotor Inertia	oz-in-s2	0.0003	0.00042	0.00056
Motor Weight	g	260	350	430
Motor Weight	oz	9.2	12	15

Dimensional Drawings +

Performance Curves +

EC044A-1 Speed Torque Performance Curve

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

EC044A-2 Speed Torque Performance Curve

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

EC044A-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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EC044A-1	Units
Rated Voltage	V	7.58	9.55	12.0	15.2	19.1	24.0	30.2	38.1
Rated Torque	Nm	0.039	0.041	0.041	0.041	0.041	0.041	0.041	0.041
Rated Torque	oz-in	5.6	5.8	5.8	5.8	5.8	5.8	5.8	5.7
Rated Speed	rpm	4240	4060	4130	4190	4190	4250	4140	4240
Rated Current	A	3.7	2.9	2.3	1.9	1.5	1.2	0.93	0.74
Rated Power	W	17	17	18	18	18	18	18	18
No Load Speed	rpm	5490	5280	5340	5370	5380	5430	5340	5420
No Load Current	A	0.31	0.24	0.19	0.15	0.12	0.097	0.075	0.061
Torque Constant	Nm/A	0.0129	0.0169	0.0210	0.0265	0.0332	0.0413	0.0529	0.0658
Torque Constant	oz-in/A	1.83	2.39	2.98	3.75	4.71	5.86	7.49	9.32
Voltage Constant	V/krpm	1.35	1.77	2.20	2.77	3.48	4.33	5.54	6.89
Terminal Resistance	Ω	0.450	0.720	1.11	1.73	2.75	4.24	6.90	10.8
Inductance	mH	0.31	0.54	0.83	1.31	2.07	3.20	5.24	8.10
Peak Current	A	17	13	11	8.8	6.9	5.7	4.4	3.5

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EC044A-2	Units
Rated Voltage	V	12.0	15.2	19.1	24.0	30.2	38.1	48.0	48.0
Rated Torque	Nm	0.059	0.061	0.061	0.061	0.061	0.060	0.061	0.063
Rated Torque	oz-in	8.3	8.7	8.6	8.6	8.7	8.6	8.6	8.9
Rated Speed	rpm	4550	4360	4430	4440	4430	4530	4440	3220
Rated Current	A	3.4	2.7	2.1	1.7	1.4	1.1	0.85	0.71
Rated Power	W	28	28	28	28	28	29	28	21
No Load Speed	rpm	5470	5270	5340	5330	5340	5410	5340	4280
No Load Current	A	0.25	0.19	0.16	0.13	0.096	0.078	0.061	0.045
Torque Constant	Nm/A	0.0206	0.0271	0.0336	0.0423	0.0532	0.0662	0.0846	0.105
Torque Constant	oz-in/A	2.92	3.84	4.76	5.99	7.53	9.37	12.0	14.9
Voltage Constant	V/krpm	2.16	2.84	3.52	4.43	5.57	6.93	8.86	11.0
Terminal Resistance	Ω	0.629	1.02	1.59	2.49	3.96	6.10	9.95	15.6
Inductance	mH	0.50	0.86	1.32	2.09	3.30	5.11	8.35	12.92
Peak Current	A	19	15	12	9.6	7.6	6.2	4.8	3.1

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EC044A-3	Units
Rated Voltage	V	15.2	19.1	24	30.2	38.1	48.0	48.0	48.0
Rated Torque	Nm	0.073	0.075	0.075	0.075	0.075	0.075	0.079	0.081
Rated Torque	oz-in	10	11	11	11	11	11	11	11
Rated Speed	rpm	4260	4040	4110	4110	4120	4200	2940	2060
Rated Current	A	3.0	2.4	1.9	1.5	1.2	0.97	0.80	0.65
Rated Power	W	32	32	32	32	32	33	24	17
No Load Speed	rpm	5050	4830	4890	4890	4910	4980	3880	3120
No Load Current	A	0.20	0.15	0.13	0.097	0.078	0.062	0.044	0.032
Torque Constant	Nm/A	0.0284	0.0372	0.0462	0.0582	0.0731	0.0909	0.116	0.145
Torque Constant	oz-in/A	4.02	5.27	6.55	8.24	10.3	12.9	16.5	20.5
Voltage Constant	V/krpm	2.97	3.90	4.84	6.09	7.65	9.52	12.2	15.1
Terminal Resistance	Ω	0.860	1.40	2.18	3.42	5.44	8.40	13.7	21.5
Inductance	mH	0.68	1.17	1.81	2.86	4.51	6.99	11.43	17.68
Peak Current	A	18	14	11	8.8	7.0	5.7	3.5	2.2

Wiring Diagram +

Color	Signal
White	Phase A
Red	Phase B
Black	Phase C
Yellow	Hall 1
Blue	Hall 2
Green	Hall 3
Violet	Hall +5 VDC
Orange	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 EC044A. 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 CPR
TTL Quadrature output
Frequency response to 220 kHz
Low power consumption, 5V @ 20mA max
Locking connector

Specifications

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

Gearboxes +

PLG42S Gearbox
The PLG42S is a 42 mm planetary gearbox suitable for servo applications where DC Servo brush or BLDC motor technology is specified. The PLG42S provides excellent efficiency in a compact and industry compatible output configuration.

Features:

Maximum Load torque up to 14 Nm
All steel gearing for high torque capacity
Dual ball bearings on output shaft
High efficiency

Specifications

GEAR DATA	UNITS	PLG42S	PLG42S	PLG42S	PLG42S	PLG42S	PLG42S	PLG42S
GEAR DATA	UNITS	4:1	8:1	16:1	25:1	32:1	50:1	64:1
Maximum Load	Nm	3.5	3.5	6	6	6	6	6
Maximum Load	oz-in	496	496	850	850	850	850	850
Weight (Mass)	g	270	270	370	370	370	370	370
Weight (Mass)	oz	9.52	9.52	13.1	13.1	13.1	13.1	13.1
Length (L_G)	mm	47.6	47.6	59.4	59.4	59.4	59.4	59.4
Length (L_G)	in	1.87	1.87	2.34	2.34	2.34	2.34	2.34
Stages	-	1	1	2	2	2	2	2
Ratio	-	4/1	8/1	16/1	25/1	32/1	50/1	64/1
Efficiency	-	0.90	0.90	0.81	0.81	0.81	0.73	0.73
Shaft Rotation	-	CW	CW	CW	CW	CW	CW	CW

GEAR DATA	UNITS	PLG42S	PLG42S	PLG42S	PLG42S	PLG42S	PLG42S	PLG42S
GEAR DATA	UNITS	100:1	128:1	156:1	200:1	256:1	400:1	512:1
Maximum Load	Nm	14	14	14	14	14	14	14
Maximum Load	oz-in	1983	1983	1983	1983	1983	1983	1983
Weight (Mass)	g	880	880	880	880	880	880	880
Weight (Mass)	oz	31.0	31.0	31.0	31.0	31.0	31.0	31.0
Length (L_G)	mm	71.2	71.2	71.2	71.2	71.2	71.2	71.2
Length (L_G)	in	2.80	2.80	2.80	2.80	2.80	2.80	2.80
Stages	-	3	3	3	3	3	3	3
Ratio	-	100/1	128/1	156.25/1	200/1	256/1	400/1	512/1
Efficiency	-	0.73	0.73	0.73	0.73	0.73	0.73	0.73
Shaft Rotation	-	CW	CW	CW	CW	CW	CW	CW

Dimensional Drawings

Combined Length

PLG42S Gearmotor
Motor	Length L_GM mm
Stage	1	2	3
EC044A-1	100.3	112.1	123.9
EC044A-2	113.0	124.8	136.6
EC044A-3	125.7	137.5	149.3

Drives +

Recommended Drives
PBL4850E

Alternate Drives
BGE6010