Brushless Motors

EC042B 42mm Brushless DC Motor

The EC042B series brushless motor is a high torque density 4 pole model designed as an economical yet higher performance general purpose servo motor. The EC042B is an excellent choice for both power transmission and precision motion control applications. It is offered in 3 motor lengths with continuous torque from 0.064 - 0.17 Nm in a 42 mm diameter. The EC042B is a great choice if more torque is needed in a 42 mm motor.

Features:

Speeds up to 9,000 RPM possible
DC bus voltage up to 96 Vdc
Large bearings for high side loads
Metric mounting
Eight standard windings per stack - Special windings available

Specifications +

MOTOR DATA	Units	EC042B-1	EC042B-2	EC042B-3
Max DC Terminal Voltage	V	96	96	96
Max Speed (Mechanical)	rpm	9000	9000	9000
Continuous Stall Torque	Nm	0.064	0.13	0.18
Continuous Stall Torque	oz-in	9.1	18	25
Peak Torque (Maximum)	Nm	0.20	0.39	0.55
Peak Torque (Maximum)	oz-in	28	55	79
Rotor Inertia	kg m2	0.000014	0.000018	0.000021
Rotor Inertia	oz-in-s2	0.0021	0.0025	0.0029
Motor Weight	g	340	540	730
Motor Weight	oz	12	19	26

Dimensional Drawings +

Performance Curves +

EC042B-1 Speed Torque Performance Curve

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

EC042B-2 Speed Torque Performance Curve

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

EC042B-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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EC042B-1	Units
Rated Voltage	V	12	15.2	19.1	24.0	30.3	38.2	48.0	60.6
Rated Torque	Nm	0.057	0.057	0.058	0.058	0.058	0.056	0.056	0.058
Rated Torque	oz-in	8.1	8.1	8.2	8.2	8.2	8.0	8.0	8.2
Rated Speed	rpm	5380	5310	5360	5400	5530	5160	5100	5460
Rated Current	A	3.4	2.7	2.2	1.8	1.4	1.0	0.82	0.70
Rated Power	W	32	32	33	33	34	31	30	33
No Load Speed	rpm	6280	6210	6250	6280	6400	6090	6030	6340
No Load Current	A	0.21	0.16	0.13	0.11	0.082	0.061	0.048	0.041
Torque Constant	Nm/A	0.0181	0.0231	0.0289	0.0361	0.0448	0.0592	0.0751	0.0903
Torque Constant	oz-in/A	2.56	3.27	4.09	5.11	6.34	8.39	10.6	12.8
Voltage Constant	V/krpm	1.89	2.42	3.03	3.78	4.69	6.20	7.87	9.46
Terminal Resistance	Ω	0.446	0.724	1.10	1.72	2.61	4.97	8.05	10.9
Inductance	mH	0.57	0.94	1.47	2.30	3.53	6.18	9.94	14.36
Peak Current	A	12	9.0	7.5	6.0	4.8	3.6	2.7	2.4

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EC042B-2	Units
Rated Voltage	V	15.2	19.1	24.0	30.3	38.2	48.0	60.6	76.4
Rated Torque	Nm	0.11	0.11	0.11	0.11	0.11	0.11	0.11	0.11
Rated Torque	oz-in	15	16	16	16	16	16	16	15
Rated Speed	rpm	5850	5810	5780	5850	5620	5620	5610	5700
Rated Current	A	5.2	4.3	3.4	2.7	2.1	1.6	1.3	1.0
Rated Power	W	66	67	68	69	65	65	65	65
No Load Speed	rpm	6490	6440	6410	6470	6270	6270	6260	6350
No Load Current	A	0.28	0.22	0.17	0.14	0.11	0.082	0.065	0.053
Torque Constant	Nm/A	0.0222	0.0281	0.0355	0.0444	0.0577	0.0725	0.0918	0.114
Torque Constant	oz-in/A	3.14	3.98	5.03	6.29	8.17	10.3	13.0	16.1
Voltage Constant	V/krpm	2.33	2.95	3.72	4.65	6.05	7.60	9.61	11.9
Terminal Resistance	Ω	0.280	0.427	0.655	1.03	1.83	2.89	4.63	7.29
Inductance	mH	0.42	0.67	1.08	1.68	2.84	4.48	7.17	11.07
Peak Current	A	18	15	12	9.6	7.2	5.7	4.5	3.6

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EC042B-3	Units
Rated Voltage	V	19.1	24.0	30.3	38.2	48.0	60.6	76.4	96.0
Rated Torque	Nm	0.14	0.14	0.15	0.15	0.15	0.15	0.15	0.15
Rated Torque	oz-in	20	20	21	21	21	21	21	21
Rated Speed	rpm	6170	6220	6210	6190	6000	6220	6200	6240
Rated Current	A	5.8	4.6	3.8	3.0	2.4	1.9	1.5	1.2
Rated Power	W	91	93	95	95	95	98	97	98
No Load Speed	rpm	6710	6750	6730	6720	6540	6730	6720	6750
No Load Current	A	0.34	0.27	0.22	0.17	0.13	0.11	0.084	0.067
Torque Constant	Nm/A	0.0270	0.0337	0.0427	0.0539	0.0696	0.0854	0.108	0.135
Torque Constant	oz-in/A	3.82	4.77	6.04	7.64	9.86	12.1	15.3	19.1
Voltage Constant	V/krpm	2.82	3.53	4.47	5.65	7.29	8.94	11.3	14.1
Terminal Resistance	Ω	0.289	0.441	0.670	1.09	1.74	2.58	4.16	6.38
Inductance	mH	0.41	0.65	1.04	1.65	2.76	4.14	6.61	10.33
Peak Current	A	21	17	14	11	8.4	6.9	5.4	4.5

Wiring Diagram +

Color	Signal
Black	Phase A
White	Phase B
Red	Phase C
Green	Hall 1
Yellow	Hall 2
Blue	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 EC042B. 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 +

PLG42S Gear
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
EC042B-1	99.8	111.6	123.4
EC042B-2	119.8	131.6	143.4
EC042B-3	139.8	151.6	163.4

Recommended Gearbox Data Sheets
PLG42S Gearbox Sheet pdf

Alternate Gearbox Data Sheets
PLG52 Gearbox Sheet pdf

Drives +

Recommended Drives
PBL4850E

Integrated Drive
EC042B IDEA Motor

Alternate Drives
BGE6010