Home
About Us
Products
Blog
Industry Applications
Technology
Contact Us

Home page

DHM3-H type electromagnetic power-off brake

Details

The working principle of the electromagnetic power-off brake: the braking and separation of the power shaft are controlled by direct current, and the power-off brake is separated by power. However, when choosing products, one must not be greedy for petty gain, but should buy them from companies with complete strength and qualifications, because the reasonable optimization of the circuit of electromagnetic brake can ensure the safety and reliability of lifting, avoid jamming and other situations, and small workshops are likely to fail to guarantee the quality for the sake of efficiency. At the same time, because high-frequency operation will affect the life of components, professional and technical personnel usually have to regularly test them.
Electromagnetic power-loss brake is widely used in various lifting device operations, which not only greatly improves the efficiency of the operation, but also greatly reduces the labor cost and ensures the safety of the operation. Electromagnetic power-off brake has the advantages of low noise, low heat, high safety, quick braking time and excellent torque retention utility, etc. It has been widely used in lifting devices in various industries, especially in high-frequency braking occasions.
Electromagnetic power-off brake (power-off brake) has the advantages of compact structure, convenient installation, wide adaptability, low noise, high working frequency, sensitive action, and reliable braking. It is an ideal automatic actuator. It is widely used in metallurgy, construction, chemical industry, food, machine tools, printing, packaging and other mechanical equipment, and in the event of power failure (risk prevention) braking and other occasions.

Electromagnetic power-off brake (power-off brake) uses and applications: suitable for metallurgy, machine tools, packaging, construction, chemical, food, stage, elevators, ships and other machinery and in the power-off (anti-risk) braking and other occasions, to achieve fast parking, accurate positioning, safety braking and other purposes.

An electric motor is a device that converts electrical energy into mechanical energy. The starting process of the motor will undergo a state transition from static to dynamic; after the motor is powered off during operation, it will undergo a transition from dynamic to static due to inertia. Most equipment has no requirement for the length of time from moving to static, but some equipment such as elevators, cranes, automated production lines, etc. must be stopped within a very short period of time after power failure, which introduces our topic today, motor brake control. The electromagnetic brake is generally installed at the non-shaft extension end of the motor. The motor shaft and the spline (external spline) are connected through an ordinary flat key, and then connected to the brake disc through a spline sleeve (external spline). When the motor is energized, the excitation coil of the brake is synchronously connected to the power supply. Under the action of electromagnetic force, the yoke attracts the armature to separate the armature from the brake disc, releasing the motor shaft, and the motor shaft with the brake disc runs normally or starts; When the power is off, the excitation coil loses power, and the electromagnetic force of the yoke attracting the armature disappears. The return spring pushes the brake disc and the armature to separate, forcing the brake disc and motor flange to generate friction torque, quickly stop the motor shaft.

In this particular emphasis:

(1) most of the loss of power brake is the use of DC voltage, that is, DC voltage. For the loss of power brakes used on AC motors, an AC to DC voltage converter is often required.

(2) In order to ensure the synchronization of the electromagnetic power loss brake and the power supply and power failure of the motor, the power supply line of the brake should be connected with the power supply line of the motor, and the connection should be reliable enough;

(3) The electromagnetic power loss brake can only ensure the timely release of the motor shaft when the voltage reaches or approaches the rated voltage. Therefore, this type of motor can not be started by step-down, otherwise it will cause the motor to block heat and burn the winding due to the stagnation of the motor rotor or the braking effect of the brake;

(4) The braking of the electromagnetic power-off brake is achieved by friction deceleration and spline engagement. Therefore, the gap between the stationary disc and the moving disc is very important. On the one hand, it is necessary to ensure the normal operation of the motor after the rotating shaft is released. On the other hand, it is necessary to ensure the reliability and accuracy of the braking action. In general, the gap has been adjusted in place according to the rated voltage of the matching motor when the brake leaves the factory, but when the brake is installed, the gap between the two discs should still be checked, including the check of the gap size and uniformity.

(5) For the short-circuit test of the motor, in view of the test procedure that the applied voltage is less than the rated voltage of the motor, the rotor of the motor does not need to be blocked during the short-circuit test, and the brake itself is a ready-made brake; However, when the motor is started, full pressure must be applied, and

Main performance parameters
Main Technical Data

Specifications Size	Rated transmission torque Rated Static Torque N.M	Rated voltage Rated Voltage D.C.V	Coil power consumption (20 ℃) Coil Consumption power(20℃)	Maximum allowable speed Allowed Max Revolution r/min
4H	40	207	53	3000
8H	80	207	79	3000
15H	150	207	81	2500
30H	300	207	114	2500
60H	600	207	145	2000
100H	1000	207	185	2000
160H	1600	207	220	1700
250H	2500	207	260	1500

Note: If the rated working voltage is different from the above table, it can be specially ordered by the user. For specifications above 100H, it is recommended to stop before braking.

Outline and installation dimensions

Overall and Installation Dimensions

Specifications Model		4H	8H	15H	30H	60H	100H	160H	250H
Radial dimension	D1	175	195	230	320	337	400	455	510
	D2	150	170	202	280	300	375	430	480
	D3	60	65	75	120	125	160	200	255
	D4	70	72	85	120	125	145	180	215
	D5	120	120	120	200	180	280	240	390
	D6	—	—	—	—	—	175	—	260
	D7	—	—	—	—	—	310	340	430
Axial dimension	L	73	80	104.6	127	163.8	168	183	191
	L1	15	15	15	20	28	20	20	30
	L2	30	30	35	50	56	75	125	130
	L3	4	4	4	4	4	—	—	—
	L4	—	—	—	—	—	5	5	5
	Δ	0.4	0.5	0.5	0.6	0.8	1	1	1
Shaft hole size	Φ	29.5	39.5	44.5	59	65	80	95	85
	e	8	12	12	18	18	22	25	22
	h	32.8	42.8	47.8	63.4	69.4	85.4	100.4	90.4
Other dimensions	Α	30°	37.5°	47.5°	15°	75°	11.25°	11.25°	11.25°
	M1	3 × M6	3 × M8	4 × M10	4 × M12	6 × M12	8 × M12	8 × M12	8 × M16
	M2	3 × M6	3 × M8	4 × M8	4 × M12	4 × M12	—	—	—
	M3	2 × M5	2 × M5	2 × M5	2 × M5	4 × M5	4 × M6	4 × M5	4 × M6
	P	200	200	500	350	500	500	500	500

DHM3-H type electromagnetic power-off brake

The braking of the electromagnetic power-off brake is achieved by friction deceleration and spline engagement. Therefore, the gap between the stationary disc and the moving disc is very important. On the one hand, it is necessary to ensure the normal operation of the motor after the shaft is released. It is also necessary to ensure the reliability and accuracy of the braking action. In general, the gap has been adjusted in place according to the rated voltage of the matching motor when the brake leaves the factory, but when the brake is installed, the gap between the two discs should still be checked, including the check of the gap size and uniformity.

E-mail:

xzm@tjlhq.com

Telephone:

+86-22-26616372

Product Consulting