YEJK series electromagnetic braking three-phase asynchronous motor

1. For the motor section, motors with power of 3kW and below use a Y connection upon leaving the factory, while others use a Δ connection;
2. For the brake section, motors with a mounting base number of 100 and below use DC99V, while those with a mounting base number of 112 and above use DC170V.

The connection method for a motor with a Y connection and a DC99V brake is as follows:

The motor uses a Δ connection, and the connection method for a DC170V brake is as follows:

The connection method for a motor with a Y connection and a DC170V brake 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 7 and the electromagnet 12 is called the air gap (δ). The normal operating air gap (δ) does not exceed the specified air gap value. When the motor leaves the factory, it is adjusted to the initial operating air gap range. After running for a period of time, the air gap value increases due to friction pad wear, which will affect the normal attraction 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

Prepare a set of feeler gauges. Select the thickness according to the initial operating air gap value in Table 1. As shown in Figure 1, 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, 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 for loose nuts.

The brake screws of YEJA132 and above motors have 6 sets. Following the above method, adjust three sets first at 120° intervals, then adjust the other three sets. The three points of air gap adjustment must be uniform, otherwise it will affect the attraction and braking of the brake, and in severe cases, it will burn out the coil. If there is no regular feeler gauge, similar thickness iron sheet can be used instead.

4. Torque adjustment

Select the feeler gauge thickness according to the specified initial operating air gap value. As shown in Figure 1, loosen the hexagon socket screw 16, turn the support adjusting sleeve 1 towards the electromagnet by 1-2mm to facilitate air gap adjustment, place the feeler gauge into the air gap (δ) next to the support adjusting bolt, slowly tighten the hexagon socket screw 16, press the feeler gauge, then press the support adjusting sleeve 1 against the end cover 8 plane, and remove the feeler gauge. The DZK04-75 fixed hexagon socket screw 16 has three sets. Adjust the air gap values on the three sides of the screws to the initial operating air gap value using the above method. The three air gap values must be uniform, and then tighten the hexagon socket screw 16. The DZK150 fixed hexagon socket screw 16 has four sets. The adjustment method is the same as above, generally adjusting the diagonal screws first. After adjustment, check the air gap with a feeler gauge to prevent uneven air gap. If there is no standard feeler gauge for air gap adjustment, similar thickness iron sheet can be used instead.