CW series eddy current brake-Lanmec magnetic powder clutch, torque speed sensor, magnetic powder brake, eddy current brake

CW series eddy current brake

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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

型号 Type	安装尺寸 (mm) Installing dimension(mm)									外形尺寸不大于 (mm) Max of outlinge and dimension
型号 Type	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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