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Stable torque through shaft type PBO magnetic powder brake 1

Stable torque through shaft type PBO magnetic powder brake 2

Stable torque through shaft type PBO magnetic powder brake 3

Stable torque through shaft type PBO magnetic powder brake 4

Stable torque through shaft type PBO magnetic powder brake 5

Stable torque through shaft type PBO magnetic powder brake 6

Stable torque through shaft type PBO magnetic powder brake 7

Stable torque through shaft type PBO magnetic powder brake 8

Stable torque through shaft type PBO magnetic powder brake

Heat capacity increased by rotating the periphery to improve heat dissipation. Rated torque of magnetic powder brake from 6Nm to 400 Nm with rated speed from 15 rpm to 1500Nm. Controls tension for winding and unwinding long materials such as paper, film, thread, electric wire, various sheets, and tape. Supports high speed and high functionality of production lines.

Brand:

Sunrise Group

Rated Torque:

6Nm ~ 400Nm

Delivery Term:

EXW

Certification:

Place of Origin:

Dongguan

Packing:

Export Carton/Case

Delivery time:

1-3 days

Inquiry

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Fig. 1 Structural diagrams of PB series magnetic powder brake (representative examples)

Magnetic powder brake structure and principle of operation

● The magnetic powder brake structure is shown in Fig. 1. The drive member linked to the shaft and the stator are disposed concentrically across a powder gap.

● The powder gap is filled with powder (magnetic iron powder), and the coil for passing a magnetic flux to the powder is built in the stator, and it is designed to feed direct current from outside through the lead wire.

● When a current flows in the coil, a magnetic flux is generated as indicated by broken line in the drawing, and the powder is linked like a chain along the magnetic flux, and by this coupling force a brake torque equivalent to the current is generated.

● When the exciting current is cut off, the magnetic flux disappears, and the coupling force of the powder is eliminated, thereby setting the drive member free.

magnetic powder brake Feature

Easy control over a wide range

Transmission torque changes continuously in response to changes in the exciting current, and so can be easily controlled over a wide range.

Continuous slip operation

The powder enables continuous slip on the working surface as well as stable transmission torque regardless of the slip rotation speed.

Stable torque

Due to the shape of the operating surface and powder leakage prevention structure, the distribution of powder can be kept uniform and stable torque can be reproduced even if the current is repeatedly turned on and off.

Large heat capacity

The products using powder have excellent heat resistance and an ideal cooling structure, and so can be used even in harsh continuous slip operation.

Smooth connection and drive

With almost equal coefficients of static and dynamic friction, load-based acceleration/ deceleration can be obtained without shock at the time of complete connection.

Maintenance-free

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Specification

Magnetic powder brake datasheet
Model		PBO-006	PBO-015	PBO-025	PBO-050	PBO-100	PBO-200	PBO-400
Rated torque [kgf](N-m)[		0.6(6)	1.2(12)	2.5(25	5(50)	10(100)	20(200)	40(400)
Capacity DC24V (75°C)	Current (A)	0.5	0.6	0.8	1.0	1.2	1.8	2.5
	Power (W)	7.2	9.4	17.5	22.6	28.8	45.6	70
	No. of hour set (S)	0.10	0.10	0.12	0.13	0.25	0.37	0.4
Weight		2.7	5.2	9	14.5	37	53	106
Maximum speed r/min		1500
Weight of powder (g)		14	25	39	60	117	255	370

Magnetic powder brake dimension(unit:mm)

Model	PBO-006	PBO-015	PBO-025	PBO-050	PBO-100	PBO-200	PBO-400
L1	60	70	78	96	110	132	156
L2	3	3	3	3	3	3	5
L3	5.5	6	7.5	8	9	11	13
D1	130	150	182	219	260	298	370
D2	62	82	110	130	140	180	200
D3(g7)	52	65	90	110	120	150	160
d(H7)	16	20	25	30	35	45	50
w(F7)	5	6	8	8	10	14	14
n-R*depth	6-M4*8L	6-M6*9L	6-M6*9L	6-M6*10L	6-M6*12L	6-M10*12L	6-M12*19L

Magnetic Powder Brake Mounting

(1) Fasten the fitting part of the bracket to the mounting plate and fix it.

(2) Always use an elastic coupling to connect the magnetic powder brake shaft and load shaft, and set the concentricity, perpendicularity, etc. of the shafts at this time within the allowable value of the elastic coupling to be used.

(3) When mounting a pulley or the like, ensure it is within the range of allowable shaft load

Magnetic powder clutch exciting current VS torque

Magnetic particle clutch & brake exciting vs torqu (2)

Powder clutch|brake Application

Stable torque through shaft type PBO magnetic powder brake 19

Textile machinery

Fiber twisters, treatment machines, weaving machines

Stable torque through shaft type PBO magnetic powder brake 20

Metal fishing systems

Extruders, wire stretchers, presses, welders, steel wire retractors, cutters, pipe makers, wire winding machines

Stable torque through shaft type PBO magnetic powder brake 21

Machine tool systems

Lathes, Millers, steel extruders, CNC lathes, specialized machinery

Stable torque through shaft type PBO magnetic powder brake 22

Transportation equipment

Hoists, feeders, conveyors, rollers, winders

Paper- making systems

Bag-making machines, box-making machines, slitters, book-making machinery, cutters, copy paper machines

Other machinery

Printing mchinery, wood-working machinerylaminators,testing machinery,food processing machinery, Li-battery machinerytire machinery

Magnetic powder brake slip rotation speed vs. torque characteristics

As showing below, the slip rotation speed vs. torque characteristics when the current is set as a parameter. If the exciting current is kept constant, torque can be kept constant irrespective of the slip rotation speed (the difference in rotational speed between the drive member and driven member). This is because powder (magnetic iron powder), which is also called semisolid, is used as a medium for power transmission. In other words, this characteristic means that there is no difference between the static friction torque and dynamic friction torque, indicating the ease of torque control.

This characteristic not only allows continuous slip and increases the heat capacity but also widens the scope of application of magnetic powder clutches and brakes such as for tension control and buffer startup.

In the case of tension control, for example, the slip rotation speed of the magnetic powder clutch/brake changes according to the reel diameter, but this characteristic enables simple and accurate control merely by controlling.

Application scenarios

Web guide & tension control system testing machine

Magnetic Powder Brake Allowable Connection Workload

When starting or braking loads with inertia with the clutch or brake, the powder and working surface slip and generate frictional heat. This heat generation raises the temperature of each part of the magnetic powder clutch/brake as well as the powder itself. If the heat generation is excessive, the temperature of the friction part rises abnormally. To prevent this problem, an allowable connection workload is determined for each model. The magnetic powder clutch/brake should, therefore, be used within this range.

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