YEJ series electromagnetic braking three-phase asynchronous motor
The AC brake has a fast starting response, short braking time, and adjustable reliable braking torque
Product serial number：
YJ-018
Category:
Keyword： YEJ series electromagnetic braking three-phase asynchronous motor
- Product Description
- Technical parameters
- Appearance and installation dimensions
- Wiring method
- Gap and torque adjustment
- Common faults and troubleshooting
- Sample and video download
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- Commodity name: YEJ series electromagnetic braking three-phase asynchronous motor
- Commodity ID: YJ-018
Product Introduction
The YEJ series electromagnetic braking three-phase asynchronous motor is a braking motor carefully designed according to the national standard JB/T6456. It is composed of two major parts: a general-purpose (Y2 series) three-phase asynchronous motor and a DZM series DC electromagnetic brake. Its power rating and mounting dimensions comply with JB/T6456 industry standards and IEC72 international standards. This series of products has obtained ISO9001 system certification and CCC product certification certificates.
Application Scenarios
This series of motors is suitable for environments that are not flammable, explosive, or contain corrosive gases, and are used in various machinery with requirements such as quick braking, accurate positioning, reciprocating operation, and preventing slippage, as the main or auxiliary drive, such as lifting machinery, transportation machinery, printing machinery, food machinery, construction machinery, woodworking machinery, deceleration machinery, and metallurgical machinery, etc.
Working Principle
When energized, the electromagnet generates a strong electromagnetic force to attract the armature plate, compressing the brake spring. The friction disc's two mating surfaces are separated from the pressure of the armature plate and the motor's rear cover plane, allowing the motor to rotate freely. When de-energized, the brake spring pressure presses the armature plate, tightly pressing the friction disc, generating a strong frictional braking torque, causing the rotating motor to brake quickly and achieve accurate positioning.
Product Features
1. The protection grade of this series of products all reaches IP55;
2. The motor cooling method is IC411 (self-ventilated);
3. It has a flexible manual release device;
4. The insulation grade of the motor part is divided into B and F grades, and the brake is F grade;
5. The installation dimensions and power rating of the motor fully comply with JB/T6456 industry standards and IEC-72 international standards;
6. 63～71 are aluminum shell motors, 80～160 are aluminum shell or cast iron shell motors, and 180～280 are cast iron shell motors.
Operating Conditions
1. Rated voltage: Standard products are AC380V 50Hz, or can be designed according to customer requirements;
2. Operating mode: S1 (continuous operation);
3. Altitude not exceeding 1000m;
4. Ambient temperature: -15℃～40℃;
5. When the average minimum monthly temperature is not higher than 25℃, the average maximum relative humidity in the wettest month is 95%.
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Electric motor with B3 type mounting base and feet, and end cap without flange
Electric motor with B5 type mounting base without feet, and end cap with flange (with through hole) R is the distance from the flange mating surface to the shaft shoulder
Electric motor with B14 type mounting base without feet, and end cap with flange (small flange with screw holes) R is the distance from the flange mating surface to the shaft shoulder
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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 motor uses a Y connection, and the brake uses a DC99V connection as follows:
The motor uses a Δ connection, and the brake uses a DC170V connection as follows:
The motor uses a Y connection, and the brake uses a DC170V connection as follows:
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1. Air gap value (δ) of the brake fitted in each specification motor of this series
2. Air gap inspection
As shown in Figure 1, the moving distance between the armature plate 5 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 motors are adjusted to the initial working 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 attraction and braking effect of the brake. Therefore, after the motor has been used for a period of time, check the size of the air gap (δ) according to the working air gap value and select the feeler gauge size. During the inspection, insert the feeler gauge of the selected size into the air gap (δ). If it can be inserted, it indicates that the air gap is too large and needs to be adjusted.
3. Air gap adjustment
YEJ63～132 Adjustment method: As shown in Figure 1, select the feeler gauge thickness according to the specified initial working air gap value, loosen the nut 11, slightly loosen the fixing screw 13, loosen the support adjusting screw 12, place the feeler gauge into the air gap (δ) next to the loosened screw, slowly screw in the fixing screw 13, press the feeler gauge, then tighten the support adjusting screw 12 against the end cover plane, and remove the feeler gauge. There are three sets of fixing screws 13. Using the above method, adjust the air gap values on the three sides of the screws to the initial working air gap value. The three air gap values should be uniform, and then tighten the nut 11.
YEJ160～280 Adjustment method:
As shown in Figure 1, select the feeler gauge thickness according to the specified initial working air gap value, slightly loosen the fixing screw 13, loosen the support adjusting sleeve 9 by about 1-2 mm, place the feeler gauge into the air gap next to the loosened fixing screw, slowly screw in the fixing screw 13, press the feeler gauge, then tighten the support adjusting sleeve 9 against the rear end cover (1) plane, and remove the feeler gauge. There are six sets of fixing screws 13. Using the above method, adjust the air gaps on the three sides of the screws equally spaced at 120° to the initial working air gap value. The three air gap values should be uniform, and then adjust the air gaps (δ) next to the other three sets of fixing screws, and tighten the fixing screws 13 and the support adjusting sleeve 9. After the adjustment, check the air gap with a feeler gauge to prevent uneven air gaps. If there is no standard feeler gauge for air gap adjustment, similar thickness iron sheets can be used instead. -
Serial Number Fault Phenomenon Inspection Location and Method Troubleshooting Measures 1 Brake does not engage (1) Check if the air gap exceeds the specified value;
(2) Use a multimeter to measure the resistance of the excitation coil to check for disconnections.
(3) Check if the rectifier's DC output power supply is normal;
(4) Check if the brake lead connections are loose;
(5) Long-term use of the brake may cause dust to accumulate on the armature and electromagnet surfaces, blocking the air gap.(1) If exceeded, readjust the air gap;
(2) Repair or replace the yoke if there is a disconnection;
(3) If abnormal, replace the rectifier;
(4) Retighten;
(5) Disassemble and clean the surface of foreign objects2 Brakes are ineffective or unreliable (1) Friction pad wear, increased working air gap, reduced torque;
(2) Friction pad damage;
(3) Load inertia is too large, exceeding the braking torque(1) Readjust the air gap (δ);
(2) Replace the friction disc with a new one;
(3) Re-select the motor model.3 Motor overheating (1) Overload, exceeding the rated current;
(2) Using a variable frequency drive power supply, prolonged use in the low-frequency range;
(3) Check if there are any cotton, yarn, paper scraps, etc., blocking the cooling air source at the motor air intake and fan;
(4) Check the power supply and motor for phase loss.(1) Reduce the load to within the rated load, or reconsider the motor selection;
(2) Install an additional fan;
(3) Clean the cotton and other debris from the motor air intake and fan;
(4) Repair.4 The shaft cannot rotate after manual release (1) Uneven air gap, armature, brake disc, and electromagnet are stuck;
(2) The friction disc is stuck by oil (from the gearbox or other places);
(3) The brake has not been used for a long time, and the friction pads on the motor end cover are rusted.(1) Readjust the air gap;
(2) Disassemble and remove the friction disc, wipe it dry, and then reassemble;
(3) After disassembling and removing rust spots, reassemble for normal operation. -
File Name Size Upload Date Details YEJ Series Electromagnetic Braking Three-Phase Asynchronous Motor 867KB 2021/3/10 Click to Download Operation Video 100M 2021/3/10 Click to Download
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