CN117728714A - Control system for band-type brake coil - Google Patents

Abstract

The embodiment of the application relates to a control system for band-type brake coil, control system includes: the power supply is used for providing band-type brake current for the band-type brake coil; the current regulation and control module is electrically connected with the power supply and the band-type brake coil and is used for regulating and controlling the current passing through the band-type brake coil; the control module is electrically connected with the current regulation module and is configured to: responding to a band-type brake opening signal, and controlling a current regulation module to transmit band-type brake current to a band-type brake coil so as to electrify the band-type brake coil; responding to a slow band-type brake closing signal, controlling a current regulation module to cut off band-type brake current transmitted to a band-type brake coil, and carrying out follow current on the band-type brake coil; and responding to the rapid band-type brake closing signal, controlling the current regulation module to cut off the band-type brake current transmitted to the band-type brake coil, and releasing the follow current in the band-type brake coil. The control system for the band-type brake coil, which is provided by the embodiment of the application, can at least solve the problems of reducing band-type brake noise and realizing emergency braking.

Description

Control system for band-type brake coil

Technical Field

The embodiment of the application relates to the technical field of brakes, in particular to a control system for a band-type brake coil.

Background

Band-type brakes are generally used in motor driving, elevator control and other braking occasions to play a role in decelerating and stopping. Band-type brakes are generally composed of band-type brake coils, brake wheels and brake shoes. When the band-type brake coil is electrified, the brake shoe and the brake wheel are separated, the motor normally operates, and the motor or the elevator normally operates. When the band-type brake coil loses power, the brake shoe tightly holds the brake wheel to brake the motor or the elevator.

When the band-type brake brakes, if the band-type brake coil is suddenly deenergized, the band-type brake can be closed very fast, the gap between the air gaps is large, the band-type brake noise is large, acoustic pollution is generated, and the band-type brake is easy to damage. However, in an emergency situation, the band-type brake coil is required to be quickly powered off so as to realize emergency braking and ensure safety.

Therefore, it is needed to solve the problem of reducing the noise of the band-type brake and the problem of realizing emergency braking.

Disclosure of Invention

The embodiment of the application provides a control system for band-type brake coils, which at least solves the problems.

The embodiment of the application provides a control system for band-type brake coil, include: the power supply is used for providing band-type brake current for the band-type brake coil; the current regulation and control module is electrically connected with the power supply and the band-type brake coil and is used for regulating and controlling the current passing through the band-type brake coil; the control module is electrically connected with the current regulation module and is configured to: responding to a band-type brake opening signal, and controlling a current regulation module to transmit band-type brake current to a band-type brake coil so as to electrify the band-type brake coil; responding to a slow band-type brake closing signal, controlling a current regulation module to cut off band-type brake current transmitted to a band-type brake coil, and carrying out follow current on the band-type brake coil; and responding to the rapid band-type brake closing signal, controlling the current regulation module to cut off the band-type brake current transmitted to the band-type brake coil, and releasing the follow current in the band-type brake coil.

In some embodiments, the current control module includes: the current regulation and control unit is connected between the power supply and the band-type brake coil and is configured to: an energizing circuit of band-type brake current is formed between a power supply and a band-type brake coil in response to a band-type brake opening signal so as to supply power to the band-type brake coil; responding to a closing signal of the slow band-type brake, and forming a follow current loop with the band-type brake coil so as to follow current on the band-type brake coil; an energy release loop is formed with the band-type brake coil in response to the quick closing control signal so as to release the follow current in the band-type brake coil; the first switching circuit is connected between the negative electrode of the power supply and the current regulation unit and is configured to: responding to the opening signal of the band-type brake to conduct so as to conduct the energizing circuit; in response to either of the slow band-type brake closure signal or the fast band-type brake closure signal opening, the energized loop is cut off.

In some embodiments, the current regulation unit comprises: the output end of the release circuit is connected with the positive end of the band-type brake coil, and the input end of the release circuit is connected with the negative end of the band-type brake coil; the output end of the follow current circuit is connected with the positive end of the band-type brake coil and the positive electrode of the power supply, and an output node between the output end and the input end of the follow current circuit is also connected with the first switch circuit; a second switching circuit connecting the input of the release circuit with the input of the freewheel circuit, configured to: responding to the switching-on of the band-type brake opening signal, and enabling the negative end of the band-type brake coil and the positive end of the power supply to be coupled with the first switch circuit through an output node to form an energizing loop; responding to the conduction of a closing signal of the slow band-type brake, and enabling the follow current circuit and the band-type brake coil to form a follow current loop; and responding to the opening of the quick band-type brake closing signal, so that the release circuit and the band-type brake form an energy release loop.

In some embodiments, the control module is configured to: generating a first control signal with a first preset logic level and a second control signal with the first preset logic level in response to the band-type brake opening signal, wherein the first switch circuit is conducted in response to the first control signal with the first preset logic level, and the second switch circuit is conducted in response to the second control signal with the first preset logic level to form a power-on loop; the control module is further configured to: generating a first control signal with a second preset logic level and a second control signal with a first preset logic level in response to a slow band-type brake closing signal, wherein the first switch circuit is opened in response to the first control signal with the second preset logic level, and the second switch circuit is closed in response to the second control signal with the first preset logic level; the control module is further configured to: the first switch circuit is opened in response to the first control signal having a second preset logic level, and the second switch circuit is opened in response to the second control signal having a second preset logic level.

In some embodiments, the freewheel circuit includes: the first diode and the inductance of establishing ties, the inductance is connected between the input of first diode and second switch circuit, and the output of first diode is connected with the positive end of band-type brake coil, and first switch circuit is connected with the input of first diode.

In some embodiments, the first switching circuit includes a first MOS transistor.

In some embodiments, the release circuit comprises: the input end of the second diode is connected with the negative end of the band-type brake coil, the output end of the second diode is connected with the input end of the transient voltage suppression diode, and the output end of the transient voltage suppression diode is connected with the positive end of the band-type brake coil.

In some embodiments, the second switching circuit includes a second MOS transistor.

In some embodiments, the power supply includes: the alternating current power supply is used for outputting alternating current; and the rectification circuit is connected with the output end of the alternating current power supply and is used for receiving alternating current and converting the alternating current into band-type brake current.

In some embodiments, the rectifier circuit is connected to the ac power source through a third switching circuit, and the control module is further configured to: the third switch circuit is controlled to be conducted in response to the band-type brake opening signal so that alternating current is transmitted to the rectifying circuit; and responding to the slow band-type brake closing signal or the fast band-type brake closing signal to open the third switch circuit so as to cut off the transmission of alternating current.

The technical scheme provided by the embodiment of the application has at least the following advantages:

the control system for the band-type brake coil can simultaneously solve the problems of reducing band-type brake noise and realizing emergency braking. The control module can respond to the band-type brake opening signal to control the current regulation and control module to supply power to the band-type brake coil, so that the motor can normally operate. The control module can also respond to the closing signal of the slow band-type brake, control the current regulation and control module to cut off the power supply of band-type brake current and carry out follow current to the band-type brake coil, prevent that the current in the band-type brake coil from running out fast, make the band-type brake coil slowly close, control the slow braking of band-type brake, reduce band-type brake noise. The control module is also used for responding to a rapid band-type brake closing signal, controlling the current regulation and control module to cut off the power supply of the band-type brake current and releasing the follow current in the band-type brake coil, so that the band-type brake coil is rapidly powered off, and then the band-type brake is rapidly closed, and emergency braking can be realized by the band-type brake.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, which are not to be construed as limiting the embodiments unless specifically indicated otherwise; in order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the drawings that are required to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a functional block diagram of a control system for a band-type brake coil according to one embodiment of the present disclosure;

FIG. 2 is a functional block diagram of another control system for a band-type brake coil according to an embodiment of the present disclosure;

FIG. 3 is a functional block diagram of yet another control system for a band brake coil according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a control system for a band-type brake coil according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another control system for a band-type brake coil according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another control system for a band-type brake coil according to an embodiment of the present disclosure;

FIG. 7 is a timing diagram of a control system for a band-type brake coil according to an embodiment of the present disclosure;

fig. 8 is a timing diagram of another control system for a band-type brake coil according to an embodiment of the present disclosure.

Detailed Description

The embodiment of the application provides a control system for band-type brake coil, control module can respond to band-type brake opening signal, and control current regulation and control module is to band-type brake coil power supply to make motor normal operating. The control module can also respond to the closing signal of the slow band-type brake, control the current regulation and control module to cut off the power supply of the band-type brake current, and carry out follow current on the band-type brake coil to control the slow braking of the band-type brake. The control module also responds to the rapid band-type brake closing signal, controls the current regulation and control module to cut off the power supply of the band-type brake current, releases the follow current in the band-type brake coil, and rapidly closes the band-type brake, so that the band-type brake can realize emergency braking.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, as will be appreciated by those of ordinary skill in the art, in the various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

The band-type brake coil provided by the embodiment of the application can be applied to the technical field of elevator equipment or hoisting equipment, and provides braking for equipment.

The band-type brake coil belongs to the band-type brake, and the band-type brake further comprises a brake wheel and a brake shoe. When the band-type brake coil is electrified, namely the band-type brake coil is electrified, the brake shoe and the brake wheel are separated, and the motor normally operates, so that the motor for controlling the crane or the elevator to operate normally rotates, and then the crane or the elevator is normally driven. When the band-type brake coil loses electricity, namely no current passes through the band-type brake coil, the brake shoe collides with the brake wheel, so that a motor for controlling the crane or the elevator to operate is braked, and the crane or the elevator is stopped.

Fig. 1 is a functional block diagram of a control system for a band-type brake coil according to an embodiment of the present application, fig. 2 is a functional block diagram of another control system for a band-type brake coil according to an embodiment of the present application, and fig. 3 is a functional block diagram of yet another control system for a band-type brake coil according to an embodiment of the present application; FIG. 4 is a schematic structural diagram of a control system for a band-type brake coil according to an embodiment of the present disclosure; FIG. 5 is a schematic diagram of another control system for a band-type brake coil according to an embodiment of the present disclosure; fig. 6 is a schematic structural diagram of another control system for a band-type brake coil according to an embodiment of the present disclosure.

Referring to fig. 1, a control system for a band-type brake coil includes: and a power supply 2 for supplying band-type brake current for the band-type brake coil 1. The control system for the band-type brake coil 1 further includes: the current regulation and control module 3 is electrically connected with the power supply 2 and the band-type brake coil 1 and is used for regulating and controlling the current passing through the band-type brake coil 1. The control system for the band-type brake coil 1 further includes: a control module 4, electrically connected to the current regulation module 3, configured to: responding to a band-type brake opening signal, controlling a current regulation module 3 to transmit band-type brake current to a band-type brake coil 1 so as to electrify the band-type brake coil 1; responding to a slow band-type brake closing signal, controlling a current regulation module 3 to cut off band-type brake current transmitted to a band-type brake coil 1, and carrying out follow current on the band-type brake coil 1; in response to the rapid band-type brake closing signal, the current regulation and control module 3 is controlled to cut off band-type brake current transmitted to the band-type brake coil 1 and release the follow current in the band-type brake coil 1.

The control module 4 responds to the band-type brake opening signal, and controls the current regulation and control module 3 to supply power to the band-type brake coil 1, so that band-type brake current is introduced into the band-type brake coil 1, and then the motor can be controlled to normally run. For example, when the band-type brake coil 1 is applied to the elevator field, band-type brake current is introduced into the band-type brake coil 1 to control the normal operation of the traction machine, and then the normal operation of the elevator is controlled.

The control module 4 can also respond to the closing signal of the slow band-type brake, control the current regulation and control module 3 to cut off the power supply of band-type brake current and follow current to the band-type brake coil 1, prevent the current in the band-type brake coil 1 from rapidly flowing out, enable the band-type brake coil 1 to be closed slowly, and control the band-type brake to brake slowly. The follow current means that after the band-type brake current transmitted to the band-type brake coil 1 is cut off, the current in the band-type brake coil 1 cannot disappear immediately, and part of the current can exist in the band-type brake coil 1 continuously, so that the band-type brake can be controlled to be closed slowly. Therefore, the band-type brake can be controlled to slowly brake, noise of the band-type brake is reduced, abrasion of the band-type brake is reduced, and service life of the band-type brake is prolonged. When band-type brake coil 1 is applied to the elevator field, the band-type brake is slowly closed so that the elevator slowly stops, and the experience of passengers is improved.

The control module 4 also responds to a quick band-type brake closing signal, controls the current regulation and control module 3 to cut off the power supply of the band-type brake current and release the follow current in the band-type brake coil 1, so that the band-type brake coil 1 is quickly powered off, and then the band-type brake is quickly closed, so that emergency braking can be realized by the band-type brake. When band-type brake coil 1 is applied to the elevator field, if no follow current exists in band-type brake coil 1, quick power failure can be achieved, emergency braking of an elevator can be achieved, emergency elevator stopping under critical conditions is avoided, the problem that an elevator door cannot be opened due to the fact that an elevator car misses a flat layer position due to elevator stopping delay is avoided when elevator stopping is avoided, and rescue success rate is improved. When the car is fully loaded, the problem of sliding a ladder caused by suddenly stopping the ladder can be prevented, and the problem that a speed limiter is triggered or a top pier is low due to too high speed of sliding the ladder can be avoided.

Referring to fig. 2, in some embodiments, the current control module 4 includes: the current regulation and control unit 31, connected between the power supply 2 and the band-type brake coil 1, is configured to: an energizing circuit of band-type brake current is formed between the power supply 2 and the band-type brake coil 1 in response to a band-type brake opening signal so as to supply power to the band-type brake coil 1; responding to a slow band-type brake closing signal, and forming a freewheel loop with the band-type brake coil 1 so as to freewheel the band-type brake coil 1; in response to the quick closing control signal, an energy release loop is formed with the band-type brake coil 1 to release freewheels in the band-type brake coil 1. The current control module 4 further includes: the first switching circuit 32, connected between the negative electrode of the power supply 2 and the current regulation unit 31, is configured to: responding to the opening signal of the band-type brake to conduct so as to conduct the energizing circuit; in response to either of the slow band-type brake closure signal or the fast band-type brake closure signal opening, the energized loop is cut off.

In a specific example, the power supply 2 includes a positive electrode and a negative electrode, the band-type brake current flows out from the positive electrode of the power supply 2, flows through the band-type brake coil 1, and flows back into the power supply 2 from the negative electrode of the power supply 2, so as to form a current circulation. The band-type brake coil 1 comprises a positive end and a negative end, wherein the band-type brake current flows in from the positive end of the band-type brake coil 1 and flows out from the negative end of the band-type brake coil 1.

The current regulation and control unit 31 responds to the band-type brake opening signal to form an energizing loop between the power supply 2 and the band-type brake coil 1, wherein the energizing loop is connected with the positive electrode and the negative electrode of the power supply 2 and is also connected with the positive end and the negative end of the band-type brake coil 1. The negative pole and the current regulation and control unit 31 of power supply 2 are connected to first switch circuit 32, and when first switch circuit 32 switched on, the circular telegram return circuit switched on, band-type brake electric current flowed from power supply 2's positive pole, through circular telegram return circuit, flowed into band-type brake coil 1's positive end, flowed through band-type brake coil 1, flowed from band-type brake coil 1's negative end, through circular telegram return circuit, returned power supply 2's negative pole, formed the current circulation for band-type brake electric current circulates in band-type brake coil 1.

The first switch circuit 32 is opened in response to any one of the slow band-type brake closing signal or the fast band-type brake closing signal, so that the power negative electrode is opened with the current regulation unit 31, the band-type brake current flowing from the negative end of the band-type brake coil 1 cannot flow back to the power negative electrode, the circulation of the band-type brake current is opened, the power-on loop is further cut off, and the supply of the band-type brake current is stopped.

Meanwhile, the current regulating and controlling unit 31 responds to the closing signal of the slow band-type brake, and forms a follow current loop with the band-type brake coil 1, and the follow current loop can follow current to the band-type brake coil 1, so that the current in the band-type brake coil 1 is prevented from rapidly flowing out, the band-type brake coil 1 is closed slowly, and the band-type brake is controlled to brake slowly. The current regulation and control unit 31 also responds to the quick band-type brake closing signal, forms an energy release loop with the band-type brake coil 1, releases residual freewheel in the band-type brake coil 1, enables the band-type brake coil 1 to lose electricity quickly, and then can close the band-type brake quickly, so that emergency braking can be achieved by the band-type brake.

It is not difficult to find that the first switch circuit 32 can control the on or off of the band-type brake current. When the first switch circuit 32 controls the band-type brake to cut off, the current regulating unit 31 can select to follow current to the band-type brake coil 1 or release follow current in the band-type brake coil 1 based on different control signals, so that the band-type brake is controlled to be closed slowly or closed quickly.

Referring to fig. 3, in some embodiments, the current regulation unit 31 includes: the output end of the release circuit 311 is connected with the positive end of the band-type brake coil 1, and the input end of the release circuit 311 is connected with the negative end of the band-type brake coil 1. The current regulation unit 31 further includes: the output end of the freewheel circuit 312 is connected to the positive end of the band-type brake coil 1 and the positive electrode of the power supply 2, and an output node between the output end and the input end of the freewheel circuit 312 is also connected to the first switch circuit 32. The current regulation unit 31 further includes: the second switch circuit 33, which connects the input terminal of the release circuit 311 and the input terminal of the freewheel circuit 312, is configured to: in response to the switching-on of the band-type brake opening signal, the negative end of the band-type brake coil 1 and the positive end of the power supply 2 are coupled through an output node and a first switch circuit 32 to form an energizing loop; in response to the conduction of the slow band-type brake closing signal, the follow current circuit 312 and the band-type brake coil 1 form a follow current loop; in response to the rapid band-type brake closing signal opening, the release circuit 311 and the band-type brake form an energy release loop.

The output end of the release circuit 311 is connected with the positive end of the band-type brake coil 1, and when the release circuit 311 and the band-type brake coil 1 form an energy release loop, the freewheel in the band-type brake coil 1 flows out from the negative end of the band-type brake coil 1 to the input end of the release circuit 311, flows into the positive end of the band-type brake coil 1 from the output end of the release circuit 311, and further forms an energy release loop. The energy release loop can provide a path for releasing current for the follow current in the band-type brake coil 1, and release the follow current in the band-type brake coil 1, so that the quick power failure of the band-type brake coil 1 is realized.

The freewheel circuit 312 and the band-type brake coil 1 form a freewheel loop, and provide freewheel for the band-type brake coil 1. The freewheeling is output from the output end of the freewheeling circuit 312 to the positive end of the band-type brake coil 1, and output from the negative end of the band-type brake coil 1, and flows back to the input end of the freewheeling circuit 312, thereby forming a freewheeling loop.

The second switching circuit 33 is connected between the input of the release circuit 311 and the input of the freewheel circuit 312. Since the input terminal of the release circuit 311 is connected to the negative terminal of the band-type brake coil 1, when the second switch circuit 33 is turned on, the input terminal of the freewheel circuit 312 is electrically connected to the negative terminal of the band-type brake coil 1, thereby forming a freewheel circuit. When the second switch circuit 33 is turned off, the input end of the freewheel circuit 312 is disconnected from the input end of the release circuit 311, so that the input end of the freewheel circuit 312 is disconnected from the negative end of the band-type brake coil 1, the freewheel circuit 312 is disconnected, and the release circuit 311 and the band-type brake coil 1 form an energy release circuit 311.

It will be appreciated that the energy release circuit is open when the freewheel circuit is constituted and that the freewheel circuit is open when the energy release circuit is constituted.

It is not difficult to find that, since the output end of the freewheel circuit 312 is connected to the positive end of the band-type brake coil 1 and the positive end of the power supply 2, and the output end of the release circuit 311 is connected to the positive end of the band-type brake coil 1, when the power-on loop is turned on, the band-type brake current flowing out of the positive end of the power supply 2 flows through the output end node of the release circuit 311 and the output end node of the freewheel circuit 312 to the positive end of the band-type brake coil 1. The band-type brake current flows out from the negative end of the band-type brake coil 1, flows through the input end node of the freewheel circuit 312, the input end node of the release circuit 311, the output node between the output end and the input end of the freewheel circuit 312, and the first switch circuit 32 to return to the negative electrode of the power supply 2.

It will be appreciated that if the first switch circuit 32 is connected to the output end or the input end of the freewheel circuit 312, the freewheel circuit may not be formed by disconnecting the output end of the freewheel circuit 312 from the positive end of the band-type brake coil 1 or disconnecting the input end of the freewheel circuit 312 from the second switch circuit 33 when the first switch circuit 32 is disconnected in response to the slow band-type brake closing signal and the second switch circuit 33 is turned on in response to the slow band-type brake closing signal. Therefore, the first switch circuit 32 is connected to the output terminal and the output node between the input terminals of the freewheel circuit 312, and when the first switch circuit 32 is turned on, the band-type brake current flowing from the negative terminal of the band-type brake coil 1 can flow through the second switch circuit 33, the output node and the negative terminal of the power supply 2, and when the first switch circuit 32 is turned off, the band-type brake current flowing from the negative terminal of the band-type brake coil 1 can flow through the second switch circuit 33, the output node and the output terminal of the freewheel circuit 312, and flows back to the positive terminal of the band-type brake coil 1.

In addition, since the output end of the follow current circuit 312 is connected with the positive end of the band-type brake coil 1 and the positive end of the power supply 2, and the output end of the release circuit 311 is connected with the positive end of the band-type brake coil 1, when the band-type brake current flows out from the positive end of the power supply 2, the current does not flow into the output end of the follow current circuit 312 or the output end of the release circuit 311, and thus the problem that the follow current circuit 312 and the band-type brake coil 1 form a loop or the release circuit 311 and the band-type brake coil 1 form a loop while the power-on loop is conducted can be avoided.

It is not difficult to find that, in this embodiment of the present application, only the freewheel circuit 312, the release circuit 311, the first switch circuit 32 and the second switch circuit 33 are provided, and by designing the freewheel circuit 312, the release circuit 311, the first switch circuit 32 and the connection mode between the second switch circuit 33 and the band-type brake coil 1 and the power supply 2, the current regulation module 3 not only can form an energizing circuit, but also can form a freewheel circuit and an energy release circuit, so that regulation and control of the current in the band-type brake coil 1 are realized, the circuit is simple, the number of elements is small, and the integration level is improved.

In some embodiments, the control module 4 is configured to: generating a first control signal with a first preset logic level and a second control signal with the first preset logic level in response to the band-type brake opening signal, wherein the first switch circuit 32 is turned on in response to the first control signal with the first preset logic level, and the second switch circuit 33 is turned on in response to the second control signal with the first preset logic level to form an energizing circuit; the control module is further configured to: in response to the slow band-type brake closing signal, generating a first control signal with a second preset logic level and a second control signal with a first preset logic level, wherein the first switch circuit 32 is opened in response to the first control signal with the second preset logic level, and the second switch circuit 33 is closed in response to the second control signal with the first preset logic level; the control module is further configured to: the first control signal having the second preset logic level is generated in response to the quick closing control signal, and the second control signal having the second preset logic level, the first switching circuit 32 is turned off in response to the first control signal having the second preset logic level, and the second switching circuit 33 is turned off in response to the second control signal having the second preset logic level.

In some embodiments, the control module may include a first control unit for generating and issuing the first control signal and a second control unit for generating and issuing the second control signal.

When the band-type brake coil 1 is applied to an elevator, a band-type brake opening signal can be triggered after a passenger presses a floor button. That is, after the passenger presses the button of the preset floor, the generation of the band-type brake opening signal is triggered and sent to the first control unit and the second control unit. The first control unit responds to the band-type brake opening signal to send a first control signal with a first preset logic level to the first switch circuit 32, and the second control unit responds to the band-type brake opening and absorbing to send a second control signal with the first preset logic level to the second switch circuit 33, wherein the first switch circuit 32 and the second switch circuit 33 are conducted, and then an energizing loop is formed. The band-type brake coil 1 is connected with band-type brake current to enable the traction machine to normally operate, and when the traction machine normally operates, the elevator is driven to operate.

The slow band-type brake closing signal can be triggered after the elevator reaches a preset floor. In some embodiments, the detection device may detect whether the elevator is running to a preset floor, and if the elevator is detected to run to the preset floor, generate a slow band-type brake closing signal, and output the slow band-type brake closing signal to the first control unit and the second control unit. The first control unit generates a first control signal with a second preset logic level in response to the slow band-type brake closing signal to control the first switch circuit 32 to be opened. The second control unit responds to the slow band-type brake closing signal to generate a second control signal with a first preset logic level so as to control the second switch circuit 33 to be conducted, thereby disconnecting the electrified loop and forming a follow current loop, carrying out follow current on the band-type brake coil 1, preventing the current in the band-type brake coil 1 from being quickly exhausted, enabling the band-type brake coil 1 to be slowly closed and controlling the band-type brake to be slowly braked.

The quick band-type brake close signal may be triggered after the passenger presses an emergency brake button in the elevator. When a passenger encounters an emergency, the passenger can press an emergency braking button in the elevator, trigger and generate a quick band-type brake closing signal, and output the signal to the first control unit and the second control unit. The first control unit generates a first control signal having a second preset logic level in response to the quick band-type brake closing signal to control the first switch circuit 32 to be opened. The second control unit responds to the quick band-type brake closing signal to generate a second control signal with a second preset logic level so as to control the second switch circuit 33 to be opened, thereby opening the power-on loop and the follow current loop and forming an energy release loop, so that the band-type brake coil 1 is quickly powered off, the band-type brake is further quickly closed, and emergency braking can be realized by the band-type brake.

In some embodiments, the first preset logic level may be a high level and the second preset logic level may be a low level.

In some embodiments, the first preset logic level may also be a high level and the second preset logic level may also be a low level.

Referring to fig. 4, in some embodiments, the freewheel circuit 312 includes: the first diode D1 and the inductance L are connected in series, the inductance L is connected between the input end of the first diode D1 and the second switching circuit 33, the output end of the first diode D1 is connected with the positive end of the band-type brake coil 1, and the first switching circuit 32 is connected with the input end of the first diode D1. That is, the output node is the node between the first diode D1 and the inductance L.

When the energizing circuit is conducted, the output end of the first diode D1 is connected with the positive end of the band-type brake coil 1. Therefore, during the process of transferring the band-type brake current from the power supply 2 to the positive end of the band-type brake coil 1, the band-type brake current will not flow from the output end of the first diode D1, so as to prevent the band-type brake current from flowing into the freewheel circuit 312. The band-type brake current in the band-type brake coil 1 flows out from the negative end of the band-type brake coil 1, and when the band-type brake current flows through the inductor L, induced electromotive force is generated and stored in the inductor L. When the power-on circuit is turned off, the first switch circuit 32 is turned off, the follow current circuit is turned on, the band-type brake current flowing out from the negative end of the band-type brake coil 1 cannot flow through the second switch circuit 33 and the inductor L, and when the band-type brake current reaches the output node, after flowing through the output node, the band-type brake current flows to the input end of the first diode D1, flows out from the output end of the first diode D1 to the positive end of the band-type brake coil 1, and forms the follow current circuit with the band-type brake coil 1.

Although the band-type brake current is cut off after the electrified loop is disconnected, because the energy is stored in the inductor L, after the freewheel loop is conducted, the energy stored in the inductor L flows into the band-type brake coil 1 to provide freewheel for the band-type brake coil 1.

In some embodiments, the first switching circuit 32 includes a first MOS transistor Q1. One end of the first MOS tube Q1 is connected to an output node M between the first diode D1 and the inductor L, and the other end of the first MOS tube Q1 is connected to the negative electrode of the power supply 2. The first MOS transistor Q1 constitutes a chopper circuit. When the first MOS transistor Q1 is turned on, the first diode D1 is turned off, and the current output by the negative terminal of the band-type brake coil 1 is not output to the negative terminal of the switching power supply through the first diode D1, but is output to the negative terminal of the switching power supply through the first MOS transistor Q1, thereby forming an energizing circuit. When the first MOS transistor Q1 is turned off, since the inductor L has been charged before, a current flows, and the current flows from the negative terminal of the band-type brake coil 1 to the output node. Because the current at the two ends of the inductor L can not be suddenly changed, a voltage is induced, so that the first diode D1 is conducted, and the electric energy stored in the inductor L is transmitted to the positive end of the band-type brake coil 1 through the first diode D1 to provide follow current for the band-type brake coil 1.

In some embodiments, the first MOS transistor Q1 may be an NMOS transistor, and the first preset logic level may be a high level signal to control the first MOS transistor Q1 to be turned on, and the second preset logic level may be a low level signal to control the first MOS transistor Q1 to be turned off.

Referring to fig. 5, in some embodiments, the release circuit 311 includes: the input end of the second diode D2 is connected with the negative end of the band-type brake coil 1, the output end of the second diode D2 is connected with the input end of the transient voltage suppression diode Z1, and the output end of the transient voltage suppression diode Z1 is connected with the positive end of the band-type brake coil 1.

The first switch circuit 32 and the second switch circuit 33 are turned off in response to the rapid band-type brake closing signal, and thus the energizing circuit and the freewheel circuit are cut off. The two ends of the release circuit 311 are connected to the two ends of the band-type brake coil 1, and form an energy release loop with the band-type brake coil 1.

When the band-type brake current in the band-type brake coil 1 is cut off, the band-type brake coil 1 generates induced voltage, and then generates transient peak pulse current, the second diode D2 is conducted, and the current flows into the second diode D2 and the transient voltage suppression diode Z1. Under the action of transient peak pulse current, after the voltage presented by two poles of a transient voltage suppression diode Z1 rises to reverse turn-off voltage, the high resistance at two ends of the band-type brake coil 1 is changed into low resistance at a certain speed, the current in a circuit is absorbed, and the voltage clamp at two ends of the band-type brake coil 1 is positioned at a fixed value, so that the energy in the band-type brake coil 1 is released, and the band-type brake coil 1 is rapidly powered off.

It will be appreciated that the second diode D2 is in an off state when the power-on circuit and the freewheel circuit are on, and therefore the release circuit is not formed.

In some embodiments, the second switching circuit 33 includes a second MOS transistor Q2. One end of the second MOS tube Q2 is connected with the second diode D2, and the other end is connected with the inductor L to form a chopper circuit. When the second MOS transistor Q2 is turned on, the second diode D2 is turned off, and the current output by the negative terminal of the band-type brake coil 1 does not pass through the second diode D2. Therefore, the release circuit 311 is not turned on when the current-carrying circuit is formed or when the freewheel circuit is formed. The current output by the negative end of the band-type brake coil 1 is directly output through the second MOS tube Q2. When the second MOS transistor Q2 is turned off, the band-type brake coil 1 generates an induced voltage, so that the second diode D2 is turned on, and the second diode D2, the transient voltage suppression diode Z1 and the band-type brake coil 1 form an energy release loop.

In some embodiments, the second MOS transistor Q2 may be an NMOS transistor, and the first preset logic level may be a high level signal to control the second MOS transistor Q2 to be turned on, and the second preset logic level may be a low level signal to control the second MOS transistor Q2 to be turned off.

Referring to fig. 6, in some embodiments, the power supply 2 includes: an alternating current power supply AC for outputting alternating current; the rectifying circuit 21 is connected to an output terminal of the alternating current power source AC, and is configured to receive alternating current and convert the alternating current into band-type brake current.

The rectifier circuit 21 is used for converting alternating current into direct current, that is, band-type brake current into direct current.

In some embodiments, a first end of the rectifying circuit 21 is connected to a first end of the alternating current power source AC, and a second end of the rectifying circuit 21 is connected to a second end of the alternating current power source AC. The alternating current generated by the alternating current power source AC is input through the first end and the second end of the rectifying circuit 21, and is converted into direct current.

The rectifying circuit 21 includes a positive electrode and a negative electrode, the positive electrode of the rectifying circuit 21 serves as the positive electrode of the power supply 2, and the negative electrode of the rectifying circuit 21 serves as the negative electrode of the power supply 2. The band-type brake current converted into direct current is output from the positive electrode of the rectifying circuit 21 and flows back to the negative electrode of the rectifying circuit 21 to form current circulation.

In some embodiments, the rectifying circuit 21 is connected to the alternating current power source AC through a third switching circuit, and the control module 4 is further configured to: the third switch circuit is controlled to be conducted in response to the band-type brake opening signal so that alternating current is transmitted to the rectifying circuit 21; and responding to the slow band-type brake closing signal or the fast band-type brake closing signal to open the third switch circuit so as to cut off the transmission of alternating current.

In some embodiments, the third switching circuit comprises a relay. When the relay is on, the alternating current can be transmitted to the rectification circuit 21 through the relay, and when the relay is off, the alternating current cannot be transmitted to the rectification circuit 21 through the relay, and then the transmission of the alternating current is cut off.

The relay is provided with a coil driven by the third MOS tube, and when the third MOS tube is conducted, current flows through the coil to conduct the relay. When the third MOS tube is cut off, no current flows in the coil, and the relay is disconnected.

In some embodiments, the number of relays is two, one relay KMB1 being connected between the first end of the rectifying circuit 21 and the first end of the alternating current power supply AC, and the other relay KMB2 being connected between the second end of the rectifying circuit 21 and the second end of the alternating current power supply AC.

In a specific example, the control module 4 generates a third control signal with a first preset logic level in response to the band-type brake opening signal, and transmits the third control signal to the relay, and the relay is turned on in response to the third control signal with the first preset logic level, so as to transmit the alternating current to the rectifying circuit 21. The control module 4 responds to the slow band-type brake closing signal to generate a third control signal with a second preset logic level and transmit the third control signal to the relay, and the relay responds to the third control signal with the second preset logic level to cut off the transmission of alternating current. The control module 4 generates a third control signal with a second preset logic level in response to the quick band-type brake closing signal and transmits the third control signal to the relay, and the relay is turned off in response to the third control signal with the second preset logic level to cut off the transmission of alternating current.

In some embodiments, the control module further comprises a third control unit for generating and issuing a third control signal.

In some embodiments, the third MOS transistor controlling the relay switch is an NMOS transistor. The first preset logic level is not high, and the second preset logic level is low. In a specific example, the first MOS transistor Q1 and the second MOS transistor Q2 are both NMOS transistors. The first switch circuit 32 is set as a MOS tube, so that zero current breaking of the relay can be realized.

Specifically, referring to fig. 7, when the band-type brake is required to be opened, the band-type brake is triggered to be generated, the first control unit generates a high-level first control signal a in response to the band-type brake opening signal, and transmits the high-level first control signal a to the first MOS transistor Q1 so as to conduct the first MOS transistor Q1. The second control unit responds to the band-type brake opening signal to generate a high-level second control signal B, and transmits the high-level second control signal B to the second MOS tube Q2 so as to conduct the second MOS tube Q2. The third control unit responds to the band-type brake opening signal to generate a high-level third control signal C, and transmits the high-level third control signal C to the relay to conduct the relay, so that an energizing loop is formed.

When the band-type brake is required to be slowly closed, triggering to generate a slow band-type brake closing signal, and the first control unit responds to the band-type brake opening signal to generate a low-level first control signal A and transmits the low-level first control signal A to the first MOS tube Q1 so as to cut off the first MOS tube Q1. The second control unit responds to the band-type brake opening signal to generate a high-level second control signal B, and transmits the high-level second control signal B to the second MOS tube Q2 so as to conduct the second MOS tube Q2. The third control unit responds to the band-type brake opening signal to generate a low-level third control signal C, and transmits the low-level third control signal C to the relay to cut off the relay, so that a second control signal B third control signal C third control signal B third control signal C freewheel loop is formed.

Referring to fig. 8, when the band-type brake is required to be quickly closed, the first control unit is triggered to generate a quick band-type brake closing signal, generates a low-level first control signal a in response to the band-type brake opening signal, and transmits the low-level first control signal a to the first MOS transistor Q1 so as to cut off the first MOS transistor Q1. The second control unit responds to the band-type brake opening signal to generate a low-level second control signal B, and transmits the low-level second control signal B to the second MOS tube Q2 so as to cut off the second MOS tube Q2. The third control unit responds to the band-type brake opening signal to generate a low-level third control signal C, and transmits the low-level third control signal C to the relay to cut off the relay, so that a release loop is formed.

In the control system for the band-type brake coil 1 provided in the above embodiment, the control module 4 may respond to the band-type brake opening signal to control the current regulation module 3 to supply power to the band-type brake coil 1, so that the motor operates normally. The control module 4 can also respond to the closing signal of the slow band-type brake to control the current regulation and control module 3 to cut off the power supply of the band-type brake current and carry out follow current on the band-type brake coil 1 to control the slow braking of the band-type brake. The control module 4 also responds to a quick band-type brake closing signal to control the current regulation and control module 3 to cut off the power supply of the band-type brake current and release the follow current in the band-type brake coil 1, so that the band-type brake is quickly closed, and emergency braking can be realized.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the present application and that various changes in form and details may be made therein without departing from the spirit and scope of the present application. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention shall be defined by the appended claims.

Claims (10)

1. A control system for a band-type brake coil, comprising:

The power supply is used for providing band-type brake current for the band-type brake coil;

the current regulation and control module is electrically connected with the power supply and the band-type brake coil and is used for regulating and controlling the current passing through the band-type brake coil;

the control module is electrically connected with the current regulation module and is configured to: responding to a band-type brake opening signal, and controlling the current regulation and control module to transmit the band-type brake current to the band-type brake coil so as to electrify the band-type brake coil; responding to a slow band-type brake closing signal, controlling the current regulation and control module to cut off band-type brake current transmitted to the band-type brake coil, and carrying out follow current on the band-type brake coil; and responding to a rapid band-type brake closing signal, controlling the current regulation module to cut off band-type brake current transmitted to the band-type brake coil, and releasing the freewheel in the band-type brake coil.

2. A control system for a band-type brake coil according to claim 1, wherein the current control module comprises: the current regulation and control unit is connected between the power supply and the band-type brake coil and is configured to: responding to the band-type brake opening signal to form an electrified loop of the band-type brake current between the power supply and the band-type brake coil so as to supply power to the band-type brake coil; responding to the closing signal of the slow band-type brake, and forming a follow current loop with the band-type brake coil so as to follow current on the band-type brake coil; an energy release loop is formed with the band-type brake coil in response to the rapid closing control signal so as to release the follow current in the band-type brake coil;

A first switching circuit connected between the negative electrode of the power supply and the current regulation unit, configured to: responding to the opening signal of the band-type brake to conduct so as to conduct the energizing circuit; in response to either of the slow band-type brake closure signal or the fast band-type brake closure signal being open, to cut off the energized loop.

3. A control system for a band-type brake coil according to claim 2, wherein the current regulation unit comprises: the output end of the release circuit is connected with the positive end of the band-type brake coil, and the input end of the release circuit is connected with the negative end of the band-type brake coil;

the output end of the follow current circuit is connected with the positive end of the band-type brake coil and the positive electrode of the power supply, and an output node between the output end and the input end of the follow current circuit is also connected with the first switch circuit;

a second switching circuit connecting the input of the release circuit and the input of the freewheel circuit, configured to: responding to the switching-on of the band-type brake opening signal, and enabling the negative end of the band-type brake coil and the positive end of the power supply to be coupled with the first switch circuit through the output node to form the energizing loop; responding to the closing signal conduction of the slow band-type brake, and enabling the follow current circuit and the band-type brake coil to form a follow current loop; and responding to the opening of the quick band-type brake closing signal, so that the release circuit and the band-type brake form an energy release loop.

4. A control system for a band-type brake coil according to claim 3, wherein the control module is configured to: generating a first control signal with a first preset logic level and a second control signal with the first preset logic level in response to the band-type brake opening signal, wherein the first switch circuit is conducted in response to the first control signal with the first preset logic level, and the second switch circuit is conducted in response to the second control signal with the first preset logic level so as to form the power-on loop; the control module is further configured to:

generating a first control signal with a second preset logic level and a second control signal with a first preset logic level in response to the slow band-type brake closing signal, wherein the first switch circuit is opened in response to the first control signal with the second preset logic level, and the second switch circuit is closed in response to the second control signal with the first preset logic level; the control module is further configured to:

generating a first control signal having a second preset logic level in response to the quick close control signal, and a second control signal having a second preset logic level, the first switch circuit being turned off in response to the first control signal having the second preset logic level, the second switch circuit being turned off in response to the second control signal having the second preset logic level.

5. A control system for a band-type brake coil according to claim 4, wherein the freewheel circuit includes: the switching device comprises a first diode and an inductor which are connected in series, wherein the inductor is connected between the input end of the first diode and the second switching circuit, the output end of the first diode is connected with the positive end of the band-type brake coil, and the first switching circuit is connected with the input end of the first diode.

6. A control system for a band-type brake coil as claimed in claim 5, wherein the first switching circuit comprises a first MOS transistor.

7. A control system for a band-type brake coil according to claim 4, wherein the release circuit comprises: the input end of the second diode is connected with the negative end of the band-type brake coil, the output end of the second diode is connected with the input end of the transient voltage suppression diode, and the output end of the transient voltage suppression diode is connected with the positive end of the band-type brake coil.

8. A control system for a band-type brake coil according to claim 7, wherein the second switching circuit comprises a second MOS transistor.

9. A control system for a band-type brake coil according to any one of claims 1 to 8, wherein the power supply includes:

the alternating current power supply is used for outputting alternating current;

and the rectification circuit is connected with the output end of the alternating current power supply and is used for receiving the alternating current and converting the alternating current into the band-type brake current.

10. A control system for a band-type brake coil according to claim 9, wherein the rectifier circuit is connected to the ac power source by a third switching circuit, the control module further configured to: the third switch circuit is controlled to be conducted in response to the band-type brake opening signal so that the alternating current is transmitted to the rectifying circuit; and responding to the slow band-type brake closing signal or the fast band-type brake closing signal to open the third switching circuit so as to cut off the transmission of the alternating current.