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Low EMI Coreless DC Motor 28mm High End EC Without Cogging

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Shenzhen Secore Technology Co.,Ltd

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Low EMI Coreless DC Motor 28mm High End EC Without Cogging

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Brand Name :	SECORE
Model Number :	SC-CL2856
Certification :	CE ROHS ISO9901
Price :	Negotiated The Price
Payment Terms :	T/T, D/A
Supply Ability :	100000pcs per month
Delivery Time :	6-10 working days

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Low EMI Coreless DC Motor 28mm High End EC Without Cogging

Customized Low EMI Coreless Motor 28mm, High-End EC Motor Coreless Without Cogging

Technical parameter:

Motor data			Motor model no.
Values at rated voltage			SC-CL2856
At Nomimal	Nominal voltage	V/DC	24
	Nominal speed	RPM	14940
	Nominal current	A	3.87
	Nominal Torque	mNm	45.76
Free load	No load speed	RPM	18000
Free load	No load current	mA	240
At Max Efficiency	Max efficiency	%	80
	Speed	RPM	16290
	Current	A	2.271
	Torque	mNm	25.6
At Max output power	Max output power	W	126.9
	Speed	RPM	9000
	Current	A	10.93
	Torque	mNm	134.6
At Stall	current	A	21.62
At Stall	torque	mNm	269.2

Motor constants	Motor Constants	Ω	1.11
	Terminal resistance	mH	0.12
	Torque constant	mNm/A	12.59
	Speed constant	rpm/V	750
	Speed/torque constant	rpm/mNm	66.9
	Mechanical time constant	ms	4.25
	Rotor inertia	g.cm²	6.06
	Number of pole pairs	1
	Number of phases	3
	weight of motor	0
	Typical noise level	≤50

Dimension:

Motor performance curve

Brushed DC motor vs Coreless DC motor

A typical brushed DC motor consists of an outer stator, typically made of either a permanent magnet or electromagnetic windings, and an inner rotor made of iron laminations with coil windings. A segmented commutator and brushes control the sequence in which the rotor windings are energized, to produce continuous rotation.

The construction of a coreless DC motor eliminates the laminated iron core of the rotor. In other words, Coreless DC motors have a rotor that is hollow and self-supporting, which reduces mass and inertia. The rotor windings are wound in a skewed, or honeycomb , forming a self-supporting hollow cylinder or basket. Since it has no iron core to support the windings, they are usually held together with epoxy. The stator is made of a rare earth magnet, and placed inside the cylinder. All of the core produces torque and smooths running.

Coreless DC motors are available in brushed and brushless versions. As the name suggests, the difference is whether the brushes are present or not. In the former, the current commutation in the stator windings and changes in magnetic field orientation is provided by brushes and commutator, in the latter they are generated electronically with the rotor position being given by special "hall sensors".

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