Brushless Motors

EC033A 33mm Brushless DC Motor

The EC033A series brushless DC motor is a high torque density model brushless motor in a 33 mm diameter housing. It is offered in 3 motor lengths with continuous torque from 0.025 - 0.06 Nm.

Features:

Speeds up to 12,000 RPM
DC bus voltage up to 60 Vdc
33mm diameter housing
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	EC033A-1	EC033A-2	EC033A-3
Max DC Terminal Voltage	V	60	60	60
Max Speed (Mechanical)	rpm	12000	12000	12000
Continuous Stall Torque	Nm	0.025	0.049	0.060
Continuous Stall Torque	oz-in	3.5	7.0	8.5
Peak Torque (Maximum)	Nm	0.081	0.16	0.19
Peak Torque (Maximum)	oz-in	12	22	27
Rotor Inertia	kg m2	0.0000012	0.0000019	0.0000027
Rotor Inertia	oz-in-s2	0.00017	0.00028	0.00039
Motor Weight	g	130	180	240
Motor Weight	oz	4.5	6.5	8.5

Dimensional Drawings +

Performance Curves +

EC033A-1 Speed Torque Performance Curve

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

EC033A-2 Speed Torque Performance Curve

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

EC033A-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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EC033A-1	Units
Rated Voltage	V	4.78	6.00	7.58	9.55	12.0	15.2	19.1	24.0
Rated Torque	Nm	0.024	0.024	0.023	0.023	0.023	0.023	0.023	0.023
Rated Torque	oz-in	3.4	3.4	3.3	3.3	3.3	3.3	3.3	3.2
Rated Speed	rpm	3430	3850	4090	4340	4540	4490	4620	4750
Rated Current	A	4.9	3.9	2.9	2.4	1.9	1.4	1.2	0.93
Rated Power	W	8.6	9.5	10	11	11	11	11	11
No Load Speed	rpm	6960	7020	6830	7020	7050	6900	7040	7080
No Load Current	A	0.57	0.46	0.35	0.29	0.23	0.18	0.15	0.12
Torque Constant	Nm/A	0.00622	0.00776	0.0101	0.0124	0.0156	0.0201	0.0248	0.0310
Torque Constant	oz-in/A	0.88	1.10	1.43	1.76	2.20	2.85	3.52	4.39
Voltage Constant	V/krpm	0.651	0.813	1.06	1.30	1.63	2.11	2.60	3.25
Terminal Resistance	Ω	0.395	0.569	0.863	1.29	1.94	3.14	4.81	7.36
Inductance	mH	0.14	0.22	0.38	0.57	0.90	1.51	2.29	3.58
Peak Current	A	12	11	8.8	7.4	6.0	4.8	3.9	3.0

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EC033A-2	Units
Rated Voltage	V	9.55	12.0	15.2	19.1	24.0	30.3	38.2	48.0
Rated Torque	Nm	0.047	0.046	0.046	0.046	0.046	0.046	0.045	0.045
Rated Torque	oz-in	6.6	6.6	6.5	6.5	6.5	6.5	6.4	6.4
Rated Speed	rpm	4780	4990	5060	5220	5350	5200	5350	5450
Rated Current	A	4.6	3.7	2.8	2.3	1.8	1.4	1.1	0.90
Rated Power	W	23	24	24	25	26	25	25	26
No Load Speed	rpm	7120	7140	7000	7140	7180	6970	7140	7180
No Load Current	A	0.44	0.35	0.27	0.22	0.18	0.14	0.11	0.087
Torque Constant	Nm/A	0.0124	0.0156	0.0201	0.0248	0.0310	0.0404	0.0498	0.0622
Torque Constant	oz-in/A	1.76	2.20	2.85	3.52	4.39	5.72	7.05	8.80
Voltage Constant	V/krpm	1.30	1.63	2.11	2.60	3.25	4.23	5.21	6.51
Terminal Resistance	Ω	0.584	0.870	1.35	2.06	3.13	5.12	7.88	12.1
Inductance	mH	0.27	0.42	0.71	1.08	1.69	2.86	4.33	6.76
Peak Current	A	15	12	9.0	7.5	6.0	4.5	3.6	3.0

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EC033A-3	Units
Rated Voltage	V	12.0	15.2	19.1	24	30.3	38.2	48.0	60.0
Rated Torque	Nm	0.052	0.051	0.050	0.049	0.049	0.048	0.049	0.049
Rated Torque	oz-in	7.3	7.2	7.1	7.0	6.9	6.9	6.9	6.9
Rated Speed	rpm	6060	6450	6590	6460	6670	6790	6550	6650
Rated Current	A	4.3	3.4	2.7	2.1	1.7	1.3	1.0	0.83
Rated Power	W	33	34	34	33	34	34	33	34
No Load Speed	rpm	7360	7610	7650	7400	7600	7660	7410	7520
No Load Current	A	0.49	0.40	0.32	0.25	0.20	0.16	0.13	0.099
Torque Constant	Nm/A	0.0152	0.0186	0.0233	0.0303	0.0372	0.0466	0.0605	0.0746
Torque Constant	oz-in/A	2.15	2.64	3.30	4.29	5.27	6.60	8.57	10.6
Voltage Constant	V/krpm	1.59	1.95	2.44	3.17	3.90	4.88	6.34	7.81
Terminal Resistance	Ω	0.532	0.774	1.17	1.84	2.82	4.32	7.10	11.0
Inductance	mH	0.26	0.39	0.62	1.04	1.58	2.46	4.16	6.30
Peak Current	A	15	12	9.6	7.5	6.0	4.8	3.6	3.0

Wiring Diagram +

Color	Signal
Brown	Phase A
Red	Phase B
Orange	Phase C
Grey	Hall 1
Blue	Hall 2
White	Hall 3
Violet	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 EC033A. 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

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

Recommended Encoder Data Sheets
E30C/D Encoder Data Sheet pdf

Gearboxes +

G30A Gearbox
The G30A is a 30mm planetary gearbox suitable for servo applications where DC Servo brush or BLDC motor technology is specified. The G30A provides maximum efficiency, minimum backlash, has a smaller mechanical footprint and is available with round and square mounting endbell configurations.

Features:

Sintered metal gears for high torque capacity
Sintered metal output bearing

Specifications

GEAR DATA	UNITS	G30A 4:1	G30A 6:1	G30A 16:1	G30A 24:1	G30A 36:1	G30A 64:1	G30A 96:1
Maximum Load	Nm	2.47	2.47	3.53	3.53	3.53	6.5	6.5
Maximum Load	oz-in	350	350	500	500	500	920	920
Weight (Mass)	g	110.6	110.6	124.7	124.7	124.7	138.9	138.9
Weight (Mass)	oz	3.9	3.9	4.4	4.4	4.4	4.9	4.9
Length (L_G)	mm	32.64	32.64	38.48	38.48	38.48	44.32	44.32
Length (L_G)	in	1.285	1.285	1.515	1.515	1.515	1.745	1.745
Stages	-	1	1	2	2	2	3	3
Ratio	-	4/1	6/1	16/1	24/1	36/1	64/1	96/1
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	G30A 144:1	G30A 216:1	G30A 256:1	G30A 384:1	G30A 576:1	G30A 864:1	G30A 1296:1
Maximum Load	Nm	6.5	6.5	8.83	8.83	8.83	8.83	8.83
Maximum Load	oz-in	920	920	1250	1250	1250	1250	1250
Weight (Mass)	g	138.9	138.9	155.9	155.9	155.9	155.9	155.9
Weight (Mass)	oz	4.9	4.9	5.5	5.5	5.5	5.5	5.5
Length (L_G)	mm	44.32	44.32	50.17	50.17	50.17	50.17	50.17
Length (L_G)	in	1.745	1.745	1.975	1.975	1.975	1.975	1.975
Stages	-	3	3	4	4	4	4	4
Ratio	-	144/1	216/1	256/1	384/1	576/1	864/1	1296/1
Efficiency	-	0.73	0.73	0.66	0.66	0.66	0.66	0.66
Shaft Rotation	-	CW	CW	CW	CW	CW	CW	CW

Dimensional Drawings

Combined Length

G30A Gearmotor
Motor	Length L_GMmm
Stage	1	2	3	4
EC033A-1	70.7	76.6	82.4	88.3
EC033A-2	83.4	89.3	95.1	101.0
EC033A-3	96.1	102.0	107.8	113.7

Drives +

Recommended Drives
PBL4850E

Alternate Drives
BGE6010