JSDZ series AC electromagnetic power-off brakeDetailed product description：

1、 Purpose and Characteristics

The JSDZ series AC electromagnetic power-off brake is mainly paired with the Y series motor to generate the YEJ series electromagnetic brake three-phase asynchronous motor. Widely used in metallurgy, construction, chemical industry, food, machine tools, printing, packaging and other machinery. Suitable for quick parking, accurate positioning, frequent starting, safe braking (risk prevention) during power outages, and other occasions.
This type of brake has the advantages of compact structure, wide applicability, high working frequency, sensitive action, reliable braking, easy installation and wiring, low noise, no need for rectifiers, and faster braking time than DC brakes. It is an ideal automation actuator.

2、 Working principle
The JSDZ series AC electromagnetic power-off brake is mainly composed of magnetic yoke components, excitation coils, springs, armature components, brake discs, gear sleeves, installation bolts, adjusting nuts and other main components. After adjusting the air gap to the specified value δ, tighten the locking nut with the motor end cover (or mounting plate), connect the gear sleeve to the transmission shaft through a key, and engage the brake disc with the gear sleeve through teeth. When the coil is powered off, friction is generated between the brake disc, armature, and machine base under the action of spring force, which is transmitted to the transmission shaft through the gear sleeve to brake the shaft. When the coil is powered on, under the action of electromagnetic force, the armature is attracted towards the magnetic yoke, causing the brake disc to release and the transmission shaft brake to be released.

1. Motor end cover 2, brake disc 3, gear sleeve 4, installation bolts
5. 8, 9, 10. Nut 6, hood 7, spring 11, fan

JSDZ1 series AC electromagnetic power-off brake

3、 Installation and adjustment
3.1 Assembly method
3.1.1 First, fix the gear sleeve (3) onto the motor shaft (or the shaft that needs to be braked), and position the two ends of the gear sleeve (3) on the shaft with retaining rings.
3.1.2 Install the brake disc (2) in the correct direction on the gear sleeve (3), so that the outer teeth of the gear sleeve (3) mesh with the inner teeth of the brake disc (2), and the brake disc (2) can move flexibly axially on the gear sleeve (3).
3.1.3 Loosen all hex nuts, screw the mounting bolt (4) into the motor end cover (or mounting plate) (1), lock the nut (5), and fix it as a whole.
3.1.4 Adjust the air gap between the magnetic yoke assembly and the armature assembly by adjusting the nuts (9) and (10), so that the air gap δ is the normal working air gap, and the air gap between the magnetic yoke assembly and the armature assembly is uniform at all locations. Then tighten the nuts (9) and (10) together.
3.1.5. Rotate the nut (8) to adjust the magnitude of the spring force, change the torque and suction performance of the brake, and refer to Table 6.3 for the adjustment amount.
3.2 Adjusting Status
3.2.1 Power on the brake separately, and gently rotate the drive shaft by hand after power on. There should be no abnormal noise, and only a "beep" sound should be heard when it is pulled in or disconnected, which can be considered as uniform adjustment of the air gap.
3.3 Adjust the length of the spring before and after adjusting the air gap.

Brake model	Spring free height	Compressed height
JSDZ-05	twenty	fifteen
JSDZ-08	twenty	fourteen
JSDZ-15	twenty-eight	twenty-four
JSDZ-30	twenty-eight	twenty-three
JSDZ-40	twenty-eight	twenty-one
JSDZ-80	thirty-two	twenty-six
JSDZ-150	thirty-two	twenty-six

4、 Usage conditions
The brake can work reliably under the following conditions:
3.1 The altitude shall not exceed 1000m.
3.2 The maximum ambient air temperature shall not exceed 40 ℃, and the minimum temperature shall be -15 ℃.
3.3 The relative humidity of the surrounding air shall not exceed 90%.
3.4 There are no gases or dust in the surrounding medium that severely corrode metals or damage insulation.
The rated voltage with voltage fluctuations not exceeding+5% and -15% shall operate continuously.
The insulation level of the brake coil is Class B.

5、 Maintenance and upkeep
4.1 The brake belongs to dry friction, and before installation, the oil and debris on the surface of the friction pair should be cleaned to avoid affecting the braking torque.
After working for a period of time, due to the wear of the brake disc friction material, the working air gap of the brake is too large. The air gap should be adjusted in a timely manner to avoid affecting normal operation. When the brake disc is excessively worn, it needs to be replaced.
4.3 The brake is generally installed horizontally. If vertical installation is required, the brake disc must be lifted so that it does not rub against the armature and friction surface during rotation.

6、 JSDZ series AC electromagnetic power-off brake technical parameters and installation size table (attached figure)

Specification data name	JSDZ- 05	JSDZ- 08	JSDZ- fifteen	JSDZ- thirty	JSDZ- forty	JSDZ- eighty	JSDZ- one hundred and fifty
Matching YEJ motor base number	seventy-one	eighty	ninety	one hundred	one hundred and twelve	one hundred and thirty-two	one hundred and sixty
Rated torque (N.m)	five	eight	fifteen	thirty	forty	eighty	one hundred and fifty
Rated power P20 ℃ (W)	fifty-five	seventy	eighty	ninety	one hundred and twenty	two hundred	two hundred and fifty
Normal working air gap δ (mm)	zero point four	zero point four	zero point four	zero point five	zero point five	zero point six	zero point six
Maximum working air gap δ max (mm)	zero point seven	zero point eight			one
Rated voltage (V AC)	380V (three-phase) 50HZ
Maximum allowable operating speed (rpm)	three thousand

Dimensions

d

D1

D2

D3

D4

D5

M

b

h

L

H1

H2

δ

JSDZ-05

fourteen point eight

one hundred and thirty-four

one hundred and twenty

twenty

fifty-three

seventy-seven

3×M8

five

sixteen point two

twenty

forty-five

fifty-five

zero point four

JSDZ-08

nineteen point eight

one hundred and fifty-two

one hundred and thirty-six

twenty-two

sixty-five

ninety-two

3×M8

six

twenty-two point six

twenty

fifty

sixty-three

zero point four

JSDZ-15

twenty-four point eight

one hundred and seventy

one hundred and forty-six

thirty

sixty-five

ninety-seven

3×M8

eight

twenty-eight point one

twenty-five

sixty-six

seventy-nine

zero point four

JSDZ-30

twenty-nine point five

one hundred and eighty-eight

one hundred and sixty-eight

thirty-five

eighty

one hundred and seventeen

3×M12

eight

thirty-two point eight

thirty

sixty-seven

eighty-one

zero point five

JSDZ-40

twenty-nine point five

two hundred and fifteen

one hundred and eighty-five

forty

ninety

one hundred and thirty

3×M12

eight

thirty-two point eight

thirty

seventy-one

eighty-five

zero point five

JSDZ-80

thirty-nine point five

two hundred and fifty

two hundred and ten

fifty

one hundred and four

one hundred and fifty

3×M14

twelve

forty-two point eight

thirty

sixty-nine

eighty-seven

zero point six

JSDZ-150

forty-four point five

two hundred and ninety-one

two hundred and fifty-five

sixty

one hundred and twenty

one hundred and eighty

4×M14

twelve

forty-seven point eight

thirty-five

eighty-six

one hundred and three

zero point six

Note: δ is the recommended initial installation air gap value.

7、 JSDZ series AC electromagnetic power-off brake wiring
Simply connect the three lead wires of the brake directly to the motor terminals (or other three-phase power sources) with the same nominal voltage as the brake.

8、 Common faults and their solutions

Fault	treatment method
1. The brake does not operate when powered on	1. Check for AC power failure. 2. The working air gap is too large.
2. Brake power supply on one side Suction, unilateral non suction	Check if the moving parts of the brake are stuck or if there are any debris.
3. Power on the brake, brake Friction and smoking at the moving disc	1. The working air gap adjustment is too small.
	2. Uneven working air gap.
	3. The friction plate has reached its wear limit and must be replaced.
4. The brake cannot stop the car	1. The rotational inertia of the working system is large, and the torque value of the brake is small.
	2. The working air gap is too large and should be adjusted.
	3. The brake disc surface has oil stains and should be cleaned.
	4. The spring is fatigued and broken, and needs to be replaced.

9、 Ordering precautions
8.1 When placing an order, the brake model, specifications, name, and quantity must be specified. Example: 10 JSDZ-30 electromagnetic power-off brakes.
8.2 Brake discs are consumable parts and can be ordered separately. Example: 10 JSDZ-30 brake discs.
9.3 If there is abnormal voltage (such as AC 220V, 450V), insulation level exceeding Class B, or special protection requirements, they should be specified when ordering and ordered separately.