WO2021147579A1

WO2021147579A1 - Fireproof smoke-blocking electric motor brake control circuit

Info

Publication number: WO2021147579A1
Application number: PCT/CN2020/137163
Authority: WO
Inventors: 刘王雍杰; 刘乐; 王绍斌
Original assignee: 福建安麟智能科技股份有限公司
Priority date: 2020-01-21
Filing date: 2020-12-17
Publication date: 2021-07-29
Also published as: CN211744375U

Abstract

Disclosed is a fireproof smoke-blocking electric motor brake control circuit, comprising a power supply (1), a two-way relay (2), a diode (3), a capacitor (4) and a brake coil (5), wherein the two-way relay (2) switches the brake coil (5) and the electrolytic capacitor (4) between a parallel circuit and a series circuit; and a common terminal of the two-way relay (2) is connected to the brake coil (5), normally closed contacts of the two-way relay (2) are respectively connected to a negative electrode and a positive electrode of the capacitor (4), normally opened contacts of the two-way relay (2) are respectively connected to the positive electrode and the negative electrode of the capacitor (4), and the power supply (1) is connected to one normally closed contact of the two-way relay (2) and the positive electrode of the capacitor (4); and the diode (3) is connected between the power supply (1) and the two-way relay (2) and between the power supply (1) and the capacitor (4). The brake coil (5) attracts a brake when the brake coil is powered on, and the brake is released when the brake coil (5) is powered off, such that a ceiling screen descends; and when the brake coil (5) is powered off, the brake coil (5) can be demagnetized promptly by means of the discharge of the capacitor (4).

Description

Brake control circuit of fire-proof and smoke-proof motor

Technical field

The present invention relates to the technical field of smoke shielding vertical walls, in particular to a fire-proof smoke shielding motor brake control circuit.

Background technique

The smoke blocking wall is mainly used to block the spread of smoke. It is mainly used in high-rise or super high-rise shopping malls, office buildings, warehouses and other occasions. It can effectively block the horizontal flow of smoke under the building ceiling and help improve the emission in the smoke-proof zone. The smoke effect plays a positive role in ensuring the safety of people’s lives and property. In the case of electrical failure, the vertical wall of the smoke shield is lowered by its own weight. If the motor brake structure is not used, the vertical wall will fall too fast. At present, the brake control circuit of the smoke shield motor generally uses the brake coil to energize to release the brake (to counteract the spring force). The brake coil is powered off and engages the brake (the brake pads are released under the action of the spring force). Therefore, when the fire protection and smoke shielding motor is powered off due to various situations, the brake cannot be released, and the safety of use cannot be guaranteed, and the coil cannot be released after the brake is powered off. demagnetization.

Technical solutions

The invention provides a brake control circuit for a fireproof smoke shield motor. When the brake coil is energized, the brake is engaged, and the brake is released when the brake coil is de-energized, so that the anti-smoke wall is lowered, and can be discharged in time through the capacitor when the brake coil is de-energized Demagnetize the brake coil.

The technical solution adopted by the present invention to solve its technical problems is to propose a fire-proof smoke-shielding motor brake control circuit, which includes a power supply, a dual-circuit relay, a diode, a capacitor, and a brake coil. The dual-circuit relay connects the brake coil with the brake coil. Electrolytic capacitors are switched in parallel and series circuits; the common end of the dual-circuit relay is connected to the brake coil, the normally closed contacts of the dual-circuit relay are respectively connected to the negative and positive electrodes of the capacitor, and the dual-circuit relay The normally open contacts are respectively connected to the positive and negative electrodes of the capacitor, the power supply is connected to a normally closed contact of the dual-circuit relay and the positive electrode of the capacitor; the diode is connected to the power supply and the Between the dual relay and the capacitor.

Further, the positive terminal of the diode is connected to the positive terminal of the power supply, the negative terminal of the diode is connected to node E, the contact a is connected to node E, and the node E is connected to node F.

Further, the contact d is connected to the node F, and the node F is connected to the positive electrode of the capacitor.

Further, the contact b and the contact c are connected to the negative electrode of the capacitor.

Further, the positive terminal of the power supply is connected to the No. 1 interface of the brake control interface JX1; the negative terminal, contact b, and contact c of the dual-circuit relay are connected to the No. 2 interface of the brake control interface JX1. The No. 2 interface is grounded.

Further, a pressure relief diode D2 is provided between the node F and the node E, the negative terminal of the pressure relief diode D2 is connected to the node F, and the positive terminal of the pressure relief diode D2 is connected to the node E.

Further, the dual-circuit relay has a freewheeling diode D3 in reverse parallel connection. It protects other components in the circuit when the dual-circuit relay is turned on and off instantaneously.

Further, the capacitor is an electrolytic capacitor. The electrolytic capacitor has a large capacity, a high rated voltage, and a large operating temperature range.

Further, the model of the dual-circuit relay is SSR482HD50. Two-phase solid state relays isolate the control end and the load end, with high reliability, no contact, long service life, fast speed, and little interference to the outside world.

Beneficial effect

By implementing the above technical solutions, the present invention has the following beneficial effects:

When the brake coil is energized, the brake is applied; when the power is suddenly cut off, the dual-circuit relay automatically shifts gears, and the brake coil is released when the brake coil is powered off. The brake coil is demagnetized in time through the capacitor discharge, so that the anti-smoke vertical wall can be under the action of its own gravity. It automatically falls down to form isolation and completes fire protection and smoke protection, which is suitable for fire protection and smoke protection requirements when the motor is powered off in emergency situations.

Embodiments of the present invention

In order to explain the embodiments of the present invention and the technical solutions in the prior art more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor. And get other implementation methods. In addition, the design orientation only indicates the relative positional relationship between the components, not the absolute positional relationship.

As shown in Figure 1 is a fire-proof and smoke-shielding motor brake control circuit of the present invention, which includes a power supply 1, a dual-circuit relay 2, a diode 3, a capacitor 4 and a brake coil 5. The dual-circuit relay 2 connects the brake coil 5 with the electrolytic capacitor 4 Switch between parallel and series circuits. The common end of the dual-circuit relay 2 is connected to the brake coil 5, the normally closed contacts of the dual-circuit relay 2 are respectively connected to the negative and positive electrodes of the capacitor 4, and the normally open contacts of the dual-circuit relay 2 are respectively connected to the positive and negative electrodes of the capacitor 4. The power supply 1 is connected to a normally closed contact of the dual-circuit relay 2 and the positive electrode of the capacitor 4. The diode 3 is connected between the power source 1 and the dual relay 2 and the capacitor 4.

As shown in Figure 1, the positive terminal of diode 3 is connected to the anode of power supply 1, the cathode of diode 3 is connected to node E, contact a is connected to node E, node E is connected to node F; contact d is connected to node F , The node F is connected to the anode of the capacitor 4. The contact b and the contact c are connected to the negative electrode of the capacitor 4. The positive terminal of the power supply 1 is connected to the No. 1 interface of the brake control interface JX1; the negative terminal, contact b, and contact c of the dual relay 2 are connected to the No. 2 interface of the brake control interface JX1, and the No. 2 interface of the brake control interface JX1 Grounded.

When the No. 1 interface of the brake control interface JX1 is connected to the power supply 1 and the No. 2 interface is grounded, the brake coil 5 is energized to generate magnetic force to make the brake attract. At the same time, the capacitor 4 is connected in parallel with the brake coil 5, and the capacitor 4 is charged; when the brake is controlled The No. 2 interface of interface JX1 is disconnected from the ground, the brake coil 5 is powered off, the magnetic force disappears, the dual relay 2 is powered off, K1 automatically switches gears, and at the same time, the capacitor 4 is connected in series with the brake coil 5, and the capacitor 4 discharges to the brake coil Perform quick demagnetization and quickly release the brake.

It is understandable that when the anti-smoke hanging wall has its own gravity, it will not automatically roll up when no external force is applied after it falls. Manual or motorized rolling can be carried out. The anti-smoke hanging wall is after its own hanging , No roll-up resistance is generated.

Figure 2 shows another implementation of the brake control circuit of a fire-proof and smoke-proof motor of the present invention. A protection element is added, and a pressure relief diode D2 can be set between node F and node E. The negative side of the pressure relief diode D2 The terminal is connected to the node F, and the positive terminal of the pressure relief diode D2 is connected to the node E. It prevents the inductive brake coil 5 from generating a reverse peak voltage that may be several times higher than the original power supply voltage at the moment of power failure. Inverse peak voltage may cause irreversible damage to other components in the line. Setting the reverse pressure relief diode D2 can give the anti-peak voltage a discharge path at the moment when the brake coil 5 is powered off. With the capacitor 4, it can absorb the anti-peak voltage generated when the coil is suddenly de-energized to achieve rapid demagnetization. Purpose. The specific model of the pressure relief diode D2 can be M7.

It is understandable that a freewheeling diode D3 can be connected in reverse parallel at both ends of the dual-circuit relay 2 to prevent the back electromotive force generated when the DC relay is disconnected from affecting the circuit or damaging other components. The reverse diode can give a loop to the back EMF, by doing work to consume the induced electromotive force of the relay coil, to prevent the induced potential of the relay coil from damaging the driver or other components when the power is turned on and off. The specific models of diode 3 (D1) and freewheeling diode D3 can use RSIM.

It can be understood that the normally closed contact and the normally open contact of the dual-circuit relay 2 can be switched and set according to actual requirements, and the function of the circuit is not affected.

The dual-circuit relay 2 can adopt a dual-phase fixed relay to ensure that the service life is long enough and the reliability is high in the normally closed state when the power is on. The specific model can be SSR482HD50.

The capacitor 4 can be an electrolytic capacitor to meet the large capacity requirement of the capacitor 4; the rated voltage is high, and it can withstand the inverse peak voltage of the inductive coil L to complete the demagnetization. The tolerable working temperature range is large and the reliability is strong. In the embodiment of the present invention, the parameter of the capacitor 4 is 100uF/100V, which can be adjusted according to actual needs.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device containing a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment. Without more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific embodiments of the present invention are limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

A brake control circuit for a fireproof smoke shield motor, which is characterized in that it comprises a power supply (1), a dual-circuit relay (2), a diode (3), a capacitor (4) and a brake coil (5). The dual-circuit relay (2) ) Is connected to the brake coil (5), the normally closed contacts of the double-circuit relay (2) are respectively connected to the negative and positive electrodes of the capacitor (4), and the normally closed contact of the double-circuit relay (2) is The open contacts are respectively connected to the positive and negative electrodes of the capacitor (4), and the power supply (1) is connected to a normally closed contact of the dual-circuit relay (2) and the positive electrode of the capacitor (4); The diode (3) is connected between the power supply (1), the dual relay (2) and the capacitor (4).
The brake control circuit of a fire-proof and smoke-proof motor according to claim 1, wherein the positive terminal of the diode (3) is connected to the positive terminal of the power supply (1), and the negative terminal of the diode (3) is It is connected to node E, contact a is connected to node E, and node E is connected to node F.
The brake control circuit of a fire protection and smoke shield motor according to claim 2, wherein the contact d is connected to the node F, and the node F is connected to the positive electrode of the capacitor (4).
The brake control circuit of a fire-proof and smoke-proof motor according to claim 3, wherein the contact b and the contact c are connected to the negative electrode of the capacitor (4).
The brake control circuit of a fireproof smoke shield motor according to claim 4, characterized in that the positive terminal of the power supply (1) is connected to the No. 1 interface of the brake control interface JX1; the negative terminal of the dual-circuit relay (2) is connected to the Point b and contact c are connected to the No. 2 interface of the brake control interface JX1, and the No. 2 interface of the brake control interface JX1 is grounded.
The brake control circuit of a fire protection and smoke shielding motor according to claim 1, wherein a pressure relief diode D2 is provided between node F and node E, and the negative end of said pressure relief diode D2 is connected to node F, The positive terminal of the pressure relief diode D2 is connected to the node E.
The brake control circuit of a fire-proof and smoke-proof motor according to claim 1, wherein the dual-circuit relay (2) is anti-parallel in parallel with the freewheeling diode D3.
The brake control circuit of a fire-proof and smoke-proof motor according to claim 1, wherein the capacitor (4) is an electrolytic capacitor.
The brake control circuit of a fire-proof and smoke-proof motor according to claim 1, wherein the model of the dual-circuit relay (2) is SSR482HD50.