YPEJA series frequency conversion speed regulation electromagnetic braking three-phase asynchronous motor

1. The connection method for the motor and brake is the same, using a Y-connection method;
2. The quick brake connection method is as follows:

1. Air gap value (δ) of the brake fitted in motors of each specification in this series

2. Air gap inspection

As shown in Figure 1, the moving distance between the armature 2 and the electromagnet 6 is called the air gap (δ). The normal operating air gap (δ) does not exceed the specified air gap value. The motors are adjusted to the initial operating air gap range at the factory. After running for a period of time, the air gap value increases due to friction pad wear, which will affect the normal engagement and braking effect of the brake. Therefore, after the motor has been used for a period of time, select the feeler gauge size according to the maximum air gap value to check the size of the air gap (δ). During the inspection, the feeler gauge of the selected size can be directly inserted into the air gap (δ). If it can be inserted, it indicates that the air gap (δ) is too large and needs to be adjusted.

3. Air gap adjustment

As shown in Figure 1, prepare a set of feeler gauges of different thicknesses. Select the thickness according to the initial operating air gap value in the table above. Loosen the nut 5, place the feeler gauge into the air gap (δ) at the edge of the loosened screw, slowly tighten the lock nut 7, press the feeler gauge, and then tighten the nut 5 outwards, and remove the feeler gauge. Use the same method to adjust the air gap at the second and third screws. After adjustment, tighten the nut 5 and the lock nut 7 again, and check regularly whether the nuts are loose. The brake screws of YEJA132 and above motors have 6 sets. The above method can be used to adjust three sets first at 120° intervals, and then adjust the other three sets. If there is no regular feeler gauge, similar thickness iron sheets can be used instead. Each 60° rotation of nut 6 (six equal divisions of the hexagonal nut) advances approximately 0.15 mm. The three air gap adjustment points must be uniform, otherwise it will affect the engagement and braking of the brake, and in severe cases, it will burn out the coil.

4. Torque adjustment

When the air gap is normal and the braking torque does not reach the rated braking torque, the three safety nuts 4 (six for models above 132) can be uniformly tightened forward to compress the braking spring 3, which can increase the braking torque, but not too much. It is only necessary to reach the rated braking torque on the nameplate. Too much spring pressure will cause difficulty in engagement, or an unpleasant squeaking electromagnetic sound, and in severe cases, it will burn out the coil.