YEJA series AC electromagnetic brake three-phase asynchronous motor is composed of two parts: standard Y2 series three-phase asynchronous motor and AZML series three-phase AC electromagnetic brake. The spindle of the back end of the motor is connected with the friction disc of the brake by spline. The electromagnet is fixed on the back end cover of the motor, which belongs to the power-off braking type.This series of products have obtained ISO 9001 system certification and CCC product certification certification.
Scope of use
YEJA three-phase AC brake motor is suitable for environments without flammable, explosive and corrosive gases. It is especially suitable for all kinds of machines requiring fast braking, accurate positioning and skidding prevention, such as lifts, transport machinery, printing machinery, packaging machinery, textile machinery, ceramic machinery, plating production line and transmission machinery matched with reducers.
When electrified, the electromagnet produces a strong electromagnetic force to suck the armature plate to compress the brake spring, so that the armature plate can be separated from the pressure on the brake disc, and the motor can rotate flexibly. When power loss occurs, the armature plate is pressurized by the brake spring pressure to tighten the brake disc and generate a strong friction braking moment, so that the rotating motor brakes rapidly and achieves accurate positioning.
1. The protection level of this series of products reaches IP55.
2. The cooling mode of motor is IC411 (self-fan cooling).
3. The AC brake has been carefully designed. In addition to the charged part sealed in the epoxy resin shell, the brake is installed in a fully sealed structural component when it is assembled with the motor, which can effectively prevent cotton yarn, paper scraps, dust, grease, iron scraps, powder and other impurities from entering the brake, thus prolonging its service life.
4. AC brake has the advantages of fast starting response, short braking time, safe and reliable braking moment adjustable, etc.
5. With flexible manual release device, self-locking or temporary wrench can be freely chosen;
6. AC brake and motor use the same power supply voltage, without AC-DC conversion rectifier, avoid AC-DC conversion, easy to use;
7. Motor insulation grade is B and F, brake insulation grade is F.
8. Use two-position junction boxes, i.e. separate junction boards for motors and brakes respectively.
9. Installation size and power level of the motor fully conform to JB/T6456 industry standard and IEC-72 international standard.
10, 63-71 are aluminium-shell motors, 80-160 are aluminium-shell or cast-iron-shell motors, and 180 are cast-iron-shell motors.
Conditions of use
1. Elevation not exceeding 1000m;
2. When the monthly mean minimum temperature is not higher than 25 C, the wettest monthly average maximum relative humidity is 95%.
3. The highest ambient temperature does not exceed 40 C and the lowest is -15 C.
4. Working mode S1 (continuous working system);
5. The rated voltage is 380V 50Hz. Different voltage and frequency can be designed and manufactured separately.
B3 type motor base with feet and no flange on the end cover
Motors with B5 frame without feet and flanges (with through holes) on the end cover R is the distance from the flange mating surface to the shaft extension shoulder
Motors with B14 frame without feet and flanges on the end cover (small flanges with screw holes) R is the distance from the flange mating surface to the shaft extension shoulder
1. The connection method of the motor and the brake is the same, which is Y connection;
2. The quick brake connection method is as follows:
1. The air gap value (δ) of the brake equipped in each specification motor of this series
2. Check the air gap
As shown in Figure 1, the moving distance between the armature 2 and the electromagnet 6 is called the air gap (δ). The normal working air gap (δ) does not exceed the specified air gap value. The motor is adjusted within the initial working air gap range when leaving the factory. After running for a period of time, the air gap value will increase due to the wear of the friction lining, which will affect the normal suction and braking effect of the brake. Therefore, after the motor has been used for a period of time, press Choose the feeler gauge size for the air gap value, and check the size of the air gap (δ). When checking, you can directly plug the feeler gauge of the selected size into the air gap (δ). If it is inserted, it means that the air gap (δ) is too large and needs to be adjusted.
3. Adjustment of air gap
As shown in Figure 1, prepare a set of thick and thin feeler gauges, select the thickness according to the initial working air gap value in the above table, loosen the nut 5, put the feeler gauge into the air gap (δ) of the loosened screw edge, slowly Screw in the lock nut 7 to compress the feeler gauge, then tighten the nut 5 outwards and pull out the feeler gauge. Use the same method to adjust the air gap between the second screw and the third screw. After the adjustment, re-tighten the nut 5 and the lock nut 7 and check whether the nut is loose. There are 6 sets of brake screws for motors above YEJA132. According to the above method, adjust three sets first and then adjust the other three sets according to the above method. If you don't have a regular feeler gauge, you can substitute it with a similar thickness of iron sheet, and the nut 6 will advance about 0.15mm for every 60° (hexagonal nut). The three points of the air gap adjustment must be uniform, otherwise it will affect the brake's engagement and braking, and the coil will burn out in severe cases.
4. Adjustment of torque
In the normal working air gap, when the braking torque does not reach the rated braking torque, the three safety nuts 4 (six for frame size 132 and above) can be evenly screwed forward to approximately compress the brake spring 3. Large braking torque, but not too much, as long as it reaches the rated braking torque on the nameplate, because the spring pressure is too large, it will be difficult to pull in, or make an unpleasant squeaking electromagnetic sound, which will burn the coil in serious cases.
|Serial number||Failure phenomenon||Inspection site and method||solution|
|1||The brake does not suck,
Have severe vibration
And squeaky screams
|(1) As shown in Figure 1, check if the nut 5 is loose;
(2) Measure whether the air gap (δ) exceeds the working air gap value;
(3) Measure the resistance of the three-phase winding with a multimeter to see if it is basically average and whether there is any disconnection;
(4) Use a multimeter to check whether there is a phase loss in the incoming AC three-phase power line with the 500V AC voltage file;
(5) The braking torque exceeds the rated value too much;
(6) Check whether there is any foreign matter stuck on the surface of the suction iron or dry grease deposits on it, causing the surface to be uneven;
(7) The surface of the iron absorption causes unevenness after long-term use;
|(1) Tighten the nut 5;
(2) If the air gap (δ) is too large, adjust to the initial working air gap range;
(3) Repair or replace the yoke if there is a broken wire;
(4) If problems are found, they will be eliminated;
(5) Adjust the compression length of the brake spring to control the braking torque;
(6) Remove foreign matter and grease;
(7) Smoothing with a lathe or surface grinder;
(8) After disassembling, remove the rust spots and reassemble, then it can work normally.
|2||The brakes are not working and the brakes are not strong||(1) The friction plate is worn, the working air gap becomes larger, and the torque drops;
(2) The friction plate is damaged;
(3) The load inertia is too large, exceeding the braking torque;
|(1) Re-adjust the air gap (δ);
(2) Replace with a new friction disc;
(3) Re-select the motor model.
|3||Motor heats up||(1) The load is too heavy and exceeds the current specified on the nameplate;
(2) Whether the axial flow fan works well;
(3) Whether there is lint, yarn, paper scraps and other sundries at the air inlet of the motor to block the cooling air source;
(4) Check the power supply and motor for phase loss.
|(1) Reduce the load and control it within the rated load, or reconsider the motor selection;
(2) If it fails to work, replace the fan;
(3) Remove the lint and other debris on the air inlet of the motor and the wind blade;
(4) Give repairs.