Legacy Brushless Motors

EA057A 57mm Brushless DC Motor

PLEASE NOTE: The information on these legacy product pages is meant to provide reference data for the products. Please consider alternative HKP product for new machine designs.

The EA057A series brushless motor is a high torque model brushless motor designed in a NEMA 23 package. It is offered in 4 motor lengths with continuous torque from 0.47 - 1.70 Nm.

Features:

Speeds up to 6,000 RPM possible
DC bus voltage up to 325 Vdc
NEMA 23 package
Five standard windings
4 Pole Rare Earth design

Videos:
How Motor Curves are Created and How to Use Them

Specifications +

MOTOR DATA	Units	EA057A-1	EA057A-2	EA057A-3	EA057A-4
Max DC Terminal Voltage	V	325	325	325	325
Max Speed (Mechanical)	rpm	6000	6000	6000	6000
Continuous Stall Torque	Nm	0.47	0.81	1.3	1.7
Continuous Stall Torque	oz-in	66	120	180	240
Peak Torque (Maximum)	Nm	1.5	2.6	4.0	5.3
Peak Torque (Maximum)	oz-in	210	370	570	750
Rotor Inertia	kg m2	0.000016	0.000029	0.000042	0.000056
Rotor Inertia	oz-in-s2	0.0022	0.0041	0.0059	0.0080
Motor Weight	g	1200	1600	2100	2400
Motor Weight	oz	43	57	74	86

Dimensional Drawings +

Performance Curves +

EA057A-1 Speed Torque Performance Curve

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

EA057A-2 Speed Torque Performance Curve

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

EA057A-3 Speed Torque Performance Curve

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

EA057A-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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EA057A-1	Units
Rated Voltage	V	76.0	76.0	152	152	305
Rated Torque	Nm	0.35	0.35	0.35	0.36	0.34
Rated Torque	oz-in	50	50	50	50	49
Rated Speed	rpm	6000	5950	6000	6000	6000
Rated Current	A	5.5	3.9	2.9	2.3	1.9
Rated Power	W	220	220	220	220	220
No Load Speed	rpm	6000	6000	6000	6000	6000
No Load Current	A	0.55	0.39	0.29	0.23	0.19
Torque Constant	Nm/A	0.0802	0.114	0.154	0.194	0.234
Torque Constant	oz-in/A	11.4	16.1	21.8	27.5	33.1
Voltage Constant	V/krpm	8.40	11.9	16.1	20.3	24.5
Terminal Resistance	Ω	1.05	2.16	3.85	6.07	9.16
Inductance	mH	0.90	1.81	3.31	5.27	7.68
Peak Current	A	21	15	11	8.7	7.2

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EA057A-2	Units
Rated Voltage	V	76.0	76.0	152	152	305
Rated Torque	Nm	0.48	0.48	0.48	0.46	0.48
Rated Torque	oz-in	68	68	68	65	68
Rated Speed	rpm	6000	6000	6000	6000	6000
Rated Current	A	6.7	5.2	3.4	2.7	1.7
Rated Power	W	300	300	300	290	300
No Load Speed	rpm	6000	5980	6000	6000	6000
No Load Current	A	0.88	0.69	0.44	0.37	0.22
Torque Constant	Nm/A	0.0936	0.120	0.187	0.227	0.374
Torque Constant	oz-in/A	13.3	17.0	26.5	32.2	53.0
Voltage Constant	V/krpm	9.80	12.6	19.6	23.8	39.2
Terminal Resistance	Ω	0.510	0.830	2.04	3.10	8.01
Inductance	mH	0.52	0.86	2.10	3.09	8.40
Peak Current	A	33	26	16	13	8.1

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EA057A-3	Units
Rated Voltage	V	76.0	152	152	305	305
Rated Torque	Nm	1.0	1.1	1.1	1.0	1.0
Rated Torque	oz-in	140	150	150	150	150
Rated Speed	rpm	6000	6000	6000	6000	4990
Rated Current	A	12	7.0	5.7	3.8	2.2
Rated Power	W	640	670	670	650	540
No Load Speed	rpm	6000	6000	6000	6000	5160
No Load Current	A	0.60	0.33	0.27	0.19	0.11
Torque Constant	Nm/A	0.100	0.180	0.221	0.321	0.561
Torque Constant	oz-in/A	14.2	25.6	31.2	45.4	79.5
Voltage Constant	V/krpm	10.5	18.9	23.1	33.6	58.8
Terminal Resistance	Ω	0.390	1.16	1.77	3.94	13.5
Inductance	mH	0.37	1.21	1.81	3.85	11.79
Peak Current	A	45	26	21	14	7.5

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EA057A-4	Units
Rated Voltage	V	76.0	152	152	305	305
Rated Torque	Nm	1.3	1.1	1.1	1.1	1.1
Rated Torque	oz-in	180	160	160	160	150
Rated Speed	rpm	5430	6000	6000	6000	6000
Rated Current	A	11	7.0	5.5	3.5	2.8
Rated Power	W	710	690	700	700	670
No Load Speed	rpm	5290	6000	5850	6000	6000
No Load Current	A	0.70	0.53	0.41	0.27	0.23
Torque Constant	Nm/A	0.137	0.192	0.247	0.384	0.455
Torque Constant	oz-in/A	19.3	27.2	34.9	54.4	64.4
Voltage Constant	V/krpm	14.3	20.1	25.8	40.2	47.6
Terminal Resistance	Ω	0.380	0.800	1.31	3.20	4.87
Inductance	mH	0.61	1.20	1.98	4.80	7.07
Peak Current	A	45	30	24	16	13

Wiring Diagram +

As viewed from the back side
Motor Connector MS3112E14-8P
Pin	Signal
1	Phase R
2	Phase S
3	Phase T
4	Case Ground
A	N/C
B	N/C
C	N/C
D	N/C

As viewed from the back side
Sensor and Encoder Connector MS3112E14-19P
Pin	Signal
A	Thermostat
B	Thermostat
C	Hall B
D	Encoder Channel Z
E	Encoder Channel Z¯
F	Encoder Channel A
G	Encoder Channel A¯
H	Encoder GND
J	Hall GND
K	Encoder +5 VDC
L	Hall +5 VDC
M	Hall A
N	Encoder Channel B
P	Encoder Channel B¯
R	Hall C
S	N/C
T	N/C
U	N/C
V	N/C

Encoders +

V Encoder
The V & Q 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	V1, V3, V5, V8
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	V
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
V Encoder Data Sheet pdf

Alternate Encoder Data Sheets
D Encoder Data Sheet pdf

Brakes +

B6 Brake
The B6 power off, fail safe holding brake is a special NEMA23 mount version designed to mount directly on the front of the EA057A motors without adapter. It has a NEMA23 flange and much larger ½” input and output shaft. The B6 is designed to hold a load in position when power is removed from the motor and brake.

Features:

Holding torque of 0.339 Nm
Special NEMA23 face mount with larger ½” shaft
24Vdc

Specifications

BRAKE DATA	UNITS	B6
Applied Voltage	Vdc	24
Holding Torque	Nm	0.339
Holding Torque	lb-in	3.0
Current	A	0.18
Resistance	Ohms	132
Inertia	Kg-m²	3.60E-06
Inertia	oz-in-sec²	5.1E-04
Weight	Kg	0.5
Weight	Lbs	1.1

Dimensional Drawings

DIMENSIONS - inches (mm)

Model	B6
A (3)	2.250 (57.15)
B (4x)	0.205 (5.21)
C (2)	16.75 (425.0)
H (3)	1.18 (29.97)
L (1)	3.031 (76.99)
U (1)	0.4997 (12.69)
U2 (3)	0.145 (3.68)
AH (3)	0.70 (17.78)
AJ (3)	2.625 (66.68)
AK (1)	1.500 (38.1)
BB (3)	0.10 (2.54)
Notes:
All Brake Data is at 20 degrees C
(1) Maximum Values, (2) Minimum Values, (3) Nominal, (4x) 4 places

Drives +

Recommended Drives
BGE6050

Alternate Drives
BGE6010