Servo Dynamics - HR70 Brush Servomotors

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HR70 Brushless Series Servomotors

The HR series offers a more cost effective range of brushless servomotors with a performance range of 1.5 Nm (13lb-in) to 25 Nm (219 lb-in). The use of high grade Neodymium-Iron-Boron (NdFeB) magnets provide a peak torque to stall torque ratio that covers the majority of applications. These are available in the following frame sizes; 92, 115, 142 mm square.

Models:

Model	Technical data	Drawings
HR70	Continuous Stall Torque TENV, 0.6 - 1.8 Nm (5.3 - 16 lb-in)	Inches	Metrics

Technical Data:

Parameter	Unit	HR70 A4-44	HR70 A4-32	HR70 A4-22	HR70 C4-64	HR70 C4-44	HR70 C4-32	HR70 E4-44	HR70 E4-32	HR70 E4-22
Voltage gradient no load	volts/krpm	44	32	22	64	44	32	44	32	22

Max.Motor EMF	line-line volts	350	260	180	510	350	260	350	260	180

Max. Speed	RPM	8000	8000	8000	8000	8000	8000	8000	8000	8000

Continuous stall torque TENV	Nm	0.6	0.6	0.6	1.2	1.2	1.2	1.8	1.8	1.8
Continuous stall torque TENV	Ib-in	5.3	5.3	5.3	10.6	10.6	10.6	16	16	16

Peak Stall Torque	Nm	2.2	2.2	2.2	4.5	4.5	4.5	6.6	6.6	6.6
Peak Stall Torque	lb-in	19	19	19	40	40	40	58	58	58

Continuous stall current rms	Amps	1.17	1.6	2.3	1.6	2.3	3.2	3.5	4.8	7

Rotor Polar Moment of Inertia	Kg.cm²	0.32	0.32	0.32	0.47	0.47	0.47	0.62	0.62	0.62

(Inclusive of resolver inertia)	lb-in Sec²	0.00028	0.00028	0.00028				0.00053	0.00053	0.00053

Cogging Torque	Nm	0.027	0.027	0.027	0.039	0.039	0.039	0.057	0.057	0.057
Cogging Torque	lb-in	0.24	0.24	0.24	0.35	0.35	0.35	0.5	0.5	0.5

Torque constant Kt (line-line)	Nm/Amp	0.51	0.375	0.258	0.75	0.51	0.375	0.51	0.375	0.258
Torque constant Kt (line-line)	lb-in/Amp	4.5	3.3	2.28	6.6	4.5	3.3	4.5	3.3	2.28

Resistance (line-line)	Ohms	18	9.2	3.9	12.5	5.3	2.9	2.9	1.7	0.79

Inductance (line-line)	Millihenrys	27	13.9	6.5	25	11.6	6	7.5	4	1.9

Insulation Class		F	F	F	F	F	F	F	F	F

Max. ambient temperature	°C	40	40	40	40	40	40	40	40	40
Max. ambient temperature	°F	104	104	104	104	104	104	104	104	104

Thermal time constant	Minutes	15	15	15	25	25	25	30	30	30

Thermal resistance	°C/Watt	2.4	2.4	2.4	1.7	1.7	1.7	1.28	1.28	1.28
Thermal resistance	°F/Watt	5	5	5	3.6	3.6	3.6	2.7	2.7	2.7

Static friction torque	Nm	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002
Static friction torque	Ib-in	0.018	0.018	0.018	0.018	0.018	0.018	0.018	0.018	0.018

Motor weight	Kg	2.0	2.0	2.0	2.6	2.6	2.6	3.2	3.2	3.2
Motor weight	lb	4.4	4.4	4.4	5.7	5.7	5.7	7.1	7.1	7.1

Contact Servo Dynamics for more Information

21541 Nordhoff Street

Chatsworth, CA 91311

Tel: 818-700-8600

Fax: 818-718-6719

Servo Dynamics Corp. First Choice for Servo Motors and Drives, 21541 Nordhoff St. Chatsworth, CA, 91311, Tel: 818-700-8600, Fax: 818-718-6719