28 Series Hollow Cup Motor

█ Product Introduction

The 28mm hollow cup motor is optimized to ensure the best cost performance.
Thanks to the lack of slots and its compact structure, we get smoother high and low speed branches, more precise control, and higher efficiency and power density.
Widely used in intelligent home appliances, medical pumps, surgical instruments and other fields.

█ Product Application

█ Optional parts

Warm reminder:
The following product parameters are standard products, our company can do product design, development and production according to the special needs of customers. For more information, please contact marketing@leiligroup.com.

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Application:
Sports health
Rated Voltage（V）DC Brushless Motor:
6, 24, 115, 230, 310
Rated Power（W）DC Brushless Motor:
0-1000, 1000-2000
Rated Speed（RPM）DC Brushless Motor:
0-10000, 1000-2000, 2000-30000, 30000+

Product Description

Performance parameter

Motor type	-	28ZWWC52
Number of poles	-	1	1	1	1	2
Phase resistance	Ω	0.52	1.7	4.3	6.6	1.6
Phase inductance	mH	0.0495	0.178	0.42	0.77	0.13
Winding connection	-	Star	Star	Star	Star	Star
Insulation class	-	B	B	B	B	B
Working system	-	S2	S2	S2	S2	S2
Feedback mode	-	Hall element	Hall element	Hall element	Hall element	Hall element
Commutation Angle	-	120°	120°	120°	120°	120°
Insulation strength	-	500VAC/1KHz/1mA/1s	500VAC/1KHz/1mA/1s	500VAC/1KHz/1mA/1s	500VAC/1KHz/1mA/1s	500VAC/1KHz/1mA/1s
Insulation resistance	-	100 MΩ/500VDC	100 MΩ/500VDC	100 MΩ/500VDC	100 MΩ/500VDC	100 MΩ/500VDC
Weight	g	170	170	170	170	170
Rated voltage	V	12	24	36	48	24
Rated power	W	30	34	35	35	37
Rated torque	mN·m	32	32	32	34	50
Rated speed	RPM	6970	8430	8370	8340	7000
Rated current	A	3.13	1.69	1.17	0.86	2
No-load speed	RPM	9270	9680	9500	9400	8500
No-load current	A	0.2	0.11	0.084	0.061	0.12
Motor efficiency	%	80	84	83	85	81.5
Noise (Ambient noise 20dB, test distance 1m)	dB	＜50	＜50	＜50	＜50	＜50
Housing - Ambient thermal resistance (no load)	K/W	0.67	0.69	0.73	0.64	0.7
Thermal time constant of motor	S	1200	1200	1080	1100	880
Ambient temperature	℃	23	24	27	25	21.2
Maximum winding temperature (no load)	℃	43.2	47.3	52.5	47.4	46.7
Torque constant	mN·m/A	10.24	18.97	27.32	39.63	25
Back electromotive force constant - peak value	V/Krpm	1.52	2.81	4.04	5.87	3.7
Back electromotive force constant - effective value	V/Krpm	1.07	1.99	2.86	4.15	2.62
Peak torque	mN·m	236.31	267.87	228.72	288.25	375
Peak current	A	23	14	8	7	15
Moment of inertia	g·cm²	10.2	10.2	10.2	10.2	10.2
Mechanical time constant	ms	5.06	4.82	5.88	4.29	2.61
End cover	-	Stainless steel	Stainless steel	Stainless steel	Stainless steel	Stainless steel
Bearing	-	Deep gutter ball	Deep gutter ball	Deep gutter ball	Deep gutter ball	Deep gutter ball
Magnet	-	Sintered NdFeB	Sintered NdFeB	Sintered NdFeB	Sintered NdFeB	Sintered NdFeB
Pivot	-	Carbon steel	Carbon steel	Carbon steel	Carbon steel	Carbon steel