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 CW series eddy current brake
　Hits：14321　AddTime：2021/9/10 10:00:56

Eddy current brake, as a kind of load, mainly used to measure the dynamic mechanical properties of test equipment, it and other control measuring instrument can be eddy current dynamometer.Can be used for internal combustion engine, motor, gas turbine, automobile and machinery components performance test, compared with other dynamometer device, the CW series dynamometer device has higher reliability, stability, and practical.
Main features:
1. Simple structure, stable operation, low price, convenient in operation and maintenance.
2. Use water cooling, low noise, small vibration.
3. Enter the wide speed range.
4. All previous control power is small, the single-phase dc power supply.
5. With measurement and control system, which can realize automation control.
6. Used as a brake, a braking force is large, the advantages of good and stable performance.
Working principle:
1. The base to structure of the CW series eddy current brake (see below)

The CW type eddy current brake (with groove wheel), by the rotor stator (including around the armature, excitation coil, end cover, bearing cover), frame composition.
Eddy current ring around the armature body (with) have the same cooling waterway, set in the excitation coil is installed before the two armature body, after the cooling water from inlet to the armature into vortex ring cooling water tank, lower body but buckle from the upper half of the armature body flow in and out of the gate, through the outlet flow out.
2. The working principle of the CW series eddy current brake
When the rotor with coaxial excitation coil assembly to pass a dc TV, its produce magnetic menstruation armature, eddy current ring, air gap and the rotor to form closed magnetic circuit.Due to the rotor outer surface is made into uniform distribution of teeth and slots, so in the air gap and vortex ring surface density can be found in the magnetic field.Therefore, when the rotor is dragging rotates, the eddy current ring as a point on the surface of the magnetic field to produce alternating changes, the induction, the magnetic field which is formed by the "vortexing" and interact with the original air-gap magnetic field, creates a braking torque on the rotor.Engine output power is converted into vortex ring "vortexing" to produce the equivalent of heat, the heat by the eddy current ring into the continuous cooling water in cooling water tank.
The main technical parameters:

Model
input speed(r/min)
Rated torque(N.m)
Rated Power(kW)
Excitation Voltage(V)
Ecitation Current(A)
Cooling water(L/min)

Weight

(Kg)

Remark
CW5B
300-3600
5
0.75
＜90DC
＜5
1
36

Speed for constant torque under 1500 r/min, More than 1500 r/min for constant power.

CW10B
10
1.5
1
40
CW20B
20
3
2
52
CW50B
50
8
5
83
CW100B
100
15
8
120
CW200B
200-3200
200
30
15
210
CW300B
300
45
25
300
CW650B
650
100
＜180DC
＜10
55
730
CW1000B
1000
150
80
1200
CW2000B
2000
315
160
2470
CW3000B
3000
470
＜20
240
3522
CW6500B
6500
1000
＜40
550
4600
CW10000B
10000
1570
＜60
800
5800
CW14000B
14000
2200
＜90
1100
8200

4.3 Characteristic curve


Note: P0: Maximum cooling power

n1: Rated minimum speed

n2: Rated maximum speed

Figure 2

5. Outlinge and installing dimension (As following table)


  Figure 3

型 號

Type

安裝尺寸 (mm)

Installing dimension(mm)

外形尺寸不大于 (mm)

Max of outlinge and dimension

A

B

C

D

E

F

G

H

K

AB

HD

L

CW 5B

160

160

8

19

40

6

15.5

100

12

210

245

256

CW 10B

190

170

21

24

50

8

20

112

12

230

256

310

CW 20B

216

140

30

28

60

8

24

132

12

272

310

324

CW 50B

279

210

30

38

80

10

33

160

19

340

365

410

CW 100B

279

267

26

42

110

12

37

180

19

350

410

450

CW 200B

356

267

30

55

110

16

49

225

19

455

510

480

CW 300B

406

356

45

65

140

18

58

250

28

506

570

595

CW 650B

457

356

40

60

105

18

53

280

28

570

650

560

CW 1000B

506

406

40

65

105

18

58

315

28

620

720

600

CW 2000B

610

457

40

70

105

20

62.5

355

35

775

770

655


Note: The outlinge and installing dimension of standard product are shown as above table. Please in kind prevail.

6. Usage, transportation and storage of electric eddy current brake

6.1 The environment temperature of electric eddy current brake is 0℃ — +40℃, the relative humidity is not more than 85%. Install the device below 1000 meters above sea level.

6.2 Electric eddy current brake should be installed on a solid foundation without any shock vibration and the surroundings shall be free of acid, alkali, salt and other harmful substances.

6.3 Transportation and storage temperature: - 30 ℃ ~ + 50 ℃ (hydrops in the cooling system shall be emptied); Transportation can be carried out in the case of packing. The speed shall keep less than 30+5 km/h on tertiary highway. Both railway and waterway are permitted.

6.4 Because the power generated by the tested machine is absorbed by electric eddy current brake, CW series electric eddy current brake shall be equipped with water in case of operation. Or the electric eddy current brake would be burnt out.

With the exception of a few heat dispersed through the shell, most heat generated by the power absorption is concentrated on the eddy current component. Therefore, as shown in Figure 1, there are several cooling water flow channels on the back of vortex ring. The external cooling water passes the flow channel and makes heat exchange with magnetic ring. The heated water runs away through pipes.

Cooling water is an important guarantee to ensure the normal operation of electric eddy current brake. The pipe with special dimension shall be installed at the inlet and outlet of eddy current brake. To inspect the leakage of water supply system and the prescribed value of water flow by means of water testing.

The cooling tap water and water in circulating pool can be used as the cooling water. When using circulating pool, the heat dissipation of cooling water shall be taken into consideration with the inlet temperature of≤25℃. The cooling water shall be clean tap water without salt, alkali and other corrosive substances, which can prevent the rapid formation of incrustation. Users can identify and judge the local water quality and take measures to prevent incrustation formation, especially in hard water areas. Or the channel of eddy current brake would be blocked quickly. And also, users can add anti-rust agent and anti-fouling additives to prolong the service life of eddy current brake.

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