Brake communication type control device

Abstract

The utility model relates to the technical field of elevator control, in particular to a brake communication type control device which comprises a main control unit, a communication type control device and a brake, the main control unit is internally provided with a first communication interface, a power input interface and a power supply output interface, and the communication type control device is internally provided with a second communication interface. The main control unit is connected with the second communication interface through the first communication interface; the main control unit is connected with an action switch in the brake through a digital input interface; the power supply input interface is used for being connected with an alternating current input device used in cooperation with a brake communication type control device, and the power supply output interface is connected with a coil terminal of the brake. Efficient integration of the brake power supply system can be achieved, the safety and function expansibility of the system are improved, and the method is suitable for optimizing the overall performance of the elevator system.

Description

TECHNICAL FIELD

[0001] The present application relates to the elevator control technical field, especially to a brake communication type control device. BACKGROUND

[0002] With the continuous development of elevator technology, the safety and reliability of its operation become the focus of design. As a key component of the elevator system, the brake not only needs to ensure the stopping performance of the elevator in daily operation, but also needs to provide brake release rescue function in emergency situations to ensure the safety of passengers. In addition, the modern elevator control system gradually develops towards intelligence, and the control mode and power management of the brake are becoming more and more complex, requiring more efficient interaction with the master control unit to adapt to the improvement of elevator safety standards.

[0003] At present, the control of the brake is mainly realized through independent power supply and switching equipment. The traditional brake release rescue function relies on external level sensing and battery boost circuit, and the power supply of the brake is completed through external power supply to slide to the level. In addition, in order to prevent the brake from overcurrent and overload under high frequency action, the existing technology usually realizes protection through the simple way of increasing fuse. In order to meet the new standard specification, the brake usually adopts two independent brake control modes, and is equipped with contactor to realize grouping monitoring and brake torque detection. These technical solutions have been widely applied in the design of elevator system.

[0004] However, the existing technology still has deficiencies in structural integration and functional reliability. For example, the power supply mode of the traditional brake release rescue is relatively dispersed, the power management efficiency is low, and the efficient communication interaction between the master control unit and the brake control device cannot be effectively realized. This limitation limits the expansion of the function of the brake, which is not conducive to the overall optimization of the elevator system. Therefore, it is urgent to design a highly integrated brake communication type control device, which can optimize the system layout while realizing more reliable brake release rescue and brake control. CONTENT OF THE INVENTION

[0005] In order to realize the efficient integration of the brake power supply system, improve the safety and functional expansion of the system, and be suitable for optimizing the overall performance of the elevator system, the present application provides a brake communication type control device. The present application provides the following technical solutions:

[0006] The application discloses a brake communication type control device, which comprises a master control unit, a communication type control device and a brake, wherein the master control unit is internally provided with a first communication interface, a power input interface and a power output interface, the communication type control device is internally provided with a second communication interface, and the master control unit is connected with the second communication interface through the first communication interface; the master control unit is connected with an action switch in the brake through a digital input interface; the power input interface is used for being connected with an alternating current input device used in cooperation with the brake communication type control device, and the power output interface is connected with a coil terminal of the brake.

[0007] In a specific implementation, the communication type control device is internally provided with a DC 24 output interface, the DC 24 output interface is connected with a DC 24V loop, and the DC 24V loop is used for providing power supply for the master control unit and the communication type control device.

[0008] In a specific implementation, the communication type control device is connected with a backup power supply through a boost circuit.

[0009] In a specific implementation, the boost circuit comprises two switching elements, two inductors, a rectifier diode and an output terminal DC+, a positive electrode of the backup power supply is connected to an input terminal of the boost circuit to form a power supply path with an input terminal of a main component in the boost circuit, the two switching elements are connected on both sides of the boost circuit respectively, the two inductors are located between the input terminal and the output terminal of the boost circuit respectively, and the rectifier diode is located at the output terminal of the boost circuit, with a cathode connected to an output terminal DC+ after voltage boosting and an anode grounded.

[0010] In a specific implementation, the communication type control device is internally provided with a detection circuit for detecting current and voltage.

[0011] In a specific implementation, the detection circuit comprises an input power line, a voltage dividing circuit, a current transformer, a resistor, an operational amplifier, a comparator, a logic control unit and a relay, the input power line is connected to a brake power supply system, the voltage dividing circuit is connected in parallel to the input power line, the current transformer is connected in series to the brake power supply circuit, with a secondary side connected to the resistor, the operational amplifier is connected to the output of the voltage dividing circuit and the current transformer through the resistor respectively, the comparator is connected to the output of the operational amplifier, the logic control unit is connected to the output of the comparator, and the relay is connected to the control output of the logic control unit, with a contact connected in series to the brake power supply circuit.

[0012] In conclusion, the application has at least the following beneficial effects:

[0013] 1) The power grid supplies power to the communication-type control device through the power input interface, and the power supply output interface of the control device directly provides an adapted working voltage to the brake coil. The DC 24 output interface is responsible for providing DC 24V power supply for other components of the system, avoiding the introduction of additional power supply modules, simplifying the circuit layout and saving space. When the power grid is powered off, the backup power supply boosts the low-voltage direct current to the voltage required by the brake and the main control unit through the boost circuit, ensuring that the brake release and level rescue operation proceed normally. At the same time, the boost circuit provides a stable output voltage through the synergistic effect of inductors, capacitors and diodes, ensuring the continuity and reliability of system operation.

[0014] 2) The detection circuit uses a voltage divider circuit and a current transformer to obtain the real-time working voltage and current signals of the brake, respectively, and sends them to the comparator through the operational amplifier for comparison with the preset threshold. When detecting that the voltage is too high or the current is overloaded, the logic control unit triggers the relay to act immediately after receiving the abnormal signal, cutting off the brake power supply line, thereby avoiding damage to the brake caused by overload or overcurrent. After receiving the feedback signal from the detection circuit, the main control unit can display fault information or start backup safety measures in time, such as issuing an alarm or performing remote shutdown.

[0015] By designing efficient connection and interaction between the main control unit, communication-type control device and brake, the system layout is optimized and the functional reliability is improved. The communication-type control device is equipped with power input interface, power supply output interface, DC 24 output interface, detection circuit and boost circuit modules, which work synergistically. Not only does it support brake power supply and operation monitoring, but also, when the power grid is powered off, it ensures system operation through the boost circuit in cooperation with the backup power supply to complete the brake release rescue operation of the elevator. In addition, the detection circuit monitors the working voltage and current in real time to ensure the safety of the brake operation. Through the above scheme, the problems of dispersed brake release rescue power supply, low power management efficiency and unreliable communication interaction between the main control unit and the brake in the prior art are effectively solved, realizing efficient integration of the brake power supply system, improving the safety and functional expandability of the system, and being suitable for optimizing the overall performance of the elevator system.

[0016] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, and to implement the content of the description, the following will describe the preferred embodiments of the present application in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural block diagram of the brake communication-type control device in the present embodiment.

[0018] Figure 2 is a circuit schematic diagram of the boost circuit in the present embodiment.

[0019] Figure 3 is a circuit schematic diagram of the detection circuit in the embodiment. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0021] In order to make the above objectives, characteristics and advantages of the present application more apparent, clear and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0022] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover the non-exclusive inclusion. For example, the process, method, system, product or equipment including a series of steps or units is not limited to the listed steps or units, but optionally further includes the steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or equipment.

[0023] In this paper, the reference to "embodiments" means that the specific features, structures or characteristics described in conjunction with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it independent or alternative embodiments to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0024] The embodiments of the present application disclose a brake communication type control device.

[0025] Reference Figure 1, the brake communication type control device comprises a master control unit, a brake and a communication type control device. The master control unit in the application is a PLC board (programmable logic controller), the master control unit is provided with a first communication interface, the communication type control device is provided with a second communication interface, and the master control unit is connected with the second communication interface through the first communication interface to complete the communication connection with the communication type control device. In the embodiment, the master control unit is connected with the action switch in the brake through the digital input interface. The action switch is used for feeding back the action state of the brake. When the brake successfully completes the brake releasing operation, the action switch is closed, the master control unit receives the signal, and it is confirmed that the brake has successfully released the brake. The master control unit continues to control the elevator according to the received state information. If the action switch does not have the expected change, the master control unit will identify as a fault, and start the related safety measures, such as sending an alarm signal or enabling the standby power supply.

[0026] With reference to Figure 1 , the communication type control device is further provided with a power input interface and a power output interface, the power input interface is used for cooperating with an alternating current input device used by the brake communication type control device, and the alternating current input device is an input interface of a power grid in the application. The power output interface is connected with the coil terminal of the brake. The power output interface of the communication type control device provides appropriate voltage for the coil of the brake. The control device can control the output voltage according to actual needs, ensure that the coil obtains correct current, and thus make the brake work normally.

[0027] With reference to Figure 1 , the communication type control device is further provided with a DC24 output interface, the DC24 output interface is connected with a DC24V loop, and is used for providing power supply for other components in the system. The DC24V output interface is responsible for outputting the direct current power from the control device to the DC24V loop, so as to supply the components needing 24V power supply in the system.

[0028] With reference to Figure 1 and Figure 2The communication type control device is connected with the backup power supply through a voltage boosting circuit. Specifically, the voltage boosting circuit is the connection core of the communication type control device and the backup power supply (labeled as G1 in the figure). The backup power supply G1 serves as a direct current power supply and provides stable boosted voltage for the communication type control device through the voltage boosting circuit. The voltage boosting circuit is composed of switching elements, inductors, rectifier diodes, and an output terminal DC+. The positive pole of the backup power supply is connected to the input terminal of the voltage boosting circuit, and forms a power supply path with the input terminals of the main components in the voltage boosting circuit. The two switching elements in the voltage boosting circuit are respectively connected on both sides of the voltage boosting circuit and control the current flow direction in the voltage boosting circuit and the charging and discharging process of the inductors. The two inductors are respectively located between the input terminal and the output terminal of the voltage boosting circuit. The inductors work in cooperation with the opening and closing actions of the switching elements to store and release energy, thereby boosting the output voltage. The rectifier diode is located at the output terminal of the voltage boosting circuit. The cathode of the rectifier diode is connected to the boosted output terminal DC+, and the anode is grounded, which is used to prevent current backflow to the inductor and ensure stable voltage output. The output terminal of the voltage boosting circuit is used to provide boosted direct current voltage for the communication type control device. The above elements complete energy conversion in the voltage boosting circuit through the standard voltage boosting principle. In implementation, the working principle of the voltage boosting circuit is as follows: the backup power supply G1 stores energy through the inductor. When the switching element is turned on, the current in the inductor gradually increases. When the switching element is turned off, the inductor releases energy, and the rectifier diode provides boosted current to the output terminal, realizing DC+ output higher than the voltage of the backup power supply.

[0029] In implementation, in the case of no power supply from the power grid, power is automatically provided to the main control unit and the brake control device. The voltage boosting circuit boosts the low voltage provided by the battery pack to the required working voltage, ensuring normal operation of the system. The main control unit checks the leveling position of the elevator car by analyzing and comparing the number of encoder pulses and displays the leveling position on the main control interface. At the same time, the brake control device performs the brake release operation with the support of the backup power supply, ensuring smooth deceleration of the elevator car to the leveling position. All brake release operations are controlled through the setting, button operation or remote operation of the main control unit or the communication type control device, realizing safe leveling of the elevator car in the case of no power supply.

[0030] Reference Figure 1 and Figure 3The communication type control device is further provided with a detection circuit, which includes an input power line, a resistance voltage dividing circuit, a current transformer, a rectifier diode, an operational amplifier, a comparator, a logic control unit and a relay. The main function of the detection circuit is to monitor the working voltage and current of the brake in real time. The input power line is directly connected to the brake power supply system and serves as the input end of the detection circuit. Voltage detection is realized by the resistance voltage dividing circuit. The input power line is connected to one end of the resistance voltage dividing circuit, which is composed of a series of precision resistors connected in a specific ratio to reduce the working voltage of the brake to a range suitable for subsequent circuit processing. The voltage signal after voltage division is further amplified and buffered by the operational amplifier to ensure that the signal strength is suitable for subsequent comparator circuit processing. Current detection is realized by the current transformer. The current transformer is connected in series to the brake power supply line and converts the current in the power supply line into a voltage signal on the secondary side by electromagnetic induction. After voltage conversion by a precision resistor, the signal is transmitted to the operational amplifier. The operational amplifier amplifies the voltage signal and transmits the amplified signal to the comparator circuit. The comparator circuit compares the voltage and current signals with the preset safety threshold respectively. If the detected voltage or current exceeds the set range, the comparator outputs an abnormal signal to the logic control unit. The logic control unit generates a control signal according to the output of the comparator and completes the protection action through the connected relay. The contacts of the relay are connected in series to the power supply line of the brake. When the logic control unit detects an abnormal signal, the relay acts to cut off the power supply line, thereby protecting the brake and related systems. In addition, the rectifier diode is used for current signal rectification to ensure the consistency of the signal direction. Through the above settings, the detection circuit realizes real-time detection and abnormal protection of the working voltage and current of the brake, ensuring the safe operation of the communication type control device and the brake.

[0031] Alternatively, the detection circuit in the present application is prior art and therefore will not be described in detail.

[0032] In implementation, the main function of the detection circuit is to monitor the working voltage and current of the brake in real time. Voltage and current signals are obtained through voltage dividing circuit and current transformer, and are sent to the comparator after amplification by the operational amplifier for comparison with the preset threshold. When the detected voltage or current exceeds the normal range, i.e. the brake is overloaded or overcurrent, the comparator outputs an abnormal signal to the logic control unit. Upon receiving the abnormal signal, the logic control unit triggers the relay to act and disconnect the power supply line of the brake, thereby realizing the function of protecting the brake and the entire system.

[0033] In summary, by designing efficient connection and interaction among the master control unit, the communication type control device and the brake, the system layout is optimized and the functional reliability is improved. The communication type control device is provided with a power input interface, a power output interface, a DC 24 output interface, a detection circuit and a voltage boosting circuit and other modules, which work cooperatively. Not only can the brake power supply and operation monitoring be supported, but also the system operation can be ensured by the voltage boosting circuit cooperating with the standby power supply when the power grid is powered off, and the brake rescue operation of the elevator can be completed. In addition, the detection circuit monitors the working voltage and current in real time to ensure the safe operation of the brake. Through the above scheme, the problems of dispersed brake rescue power supply mode, low power management efficiency and unreliable communication interaction between the master control unit and the brake in the prior art are effectively solved, efficient integration of the brake power supply system is realized, the safety and functional expansibility of the system are improved, and the overall performance of the elevator system is optimized.

[0034] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A brake communication type control device characterized by comprising: The application relates to a communication type control device and a brake, wherein the communication type control device comprises a master control unit, a communication type control device and a brake, the master control unit is internally provided with a first communication interface, a power input interface and a power output interface, the communication type control device is internally provided with a second communication interface, the master control unit is connected with the second communication interface through the first communication interface; the master control unit is connected with an action switch in the brake through a digital input interface; the power input interface is used for being connected with an alternating current input device used by a matched brake communication type control device, and the power output interface is connected with a coil terminal of the brake.

2. The brake communication type control device according to claim 1, characterized by The communication type control device is internally provided with a DC24 output interface, the DC24 output interface is connected with a DC24V loop, and the DC24V loop is used for providing power supply for the master control unit and the communication type control device.

3. The brake communication type control device according to claim 1, characterized by The communication type control device is connected with a backup power supply through a boost circuit.

4. The brake communication type control device according to claim 3, characterized by The boost circuit comprises two switching elements, two inductors, a rectifier diode and an output terminal DC+, a positive pole of the backup power supply is connected to an input terminal of the boost circuit, and a power supply path is formed between the input terminal of the boost circuit and input terminals of main components in the boost circuit; The two switching elements in the boost circuit are connected on both sides of the boost circuit, the two inductors are respectively arranged between an input terminal and an output terminal of the boost circuit, and the rectifier diode is arranged at the output terminal of the boost circuit, with a cathode connected to the boosted output terminal DC+ and an anode grounded.

5. The brake communication type control device according to claim 1, characterized by The communication type control device is internally provided with a detection circuit for detecting current and voltage.

6. The brake communication type control device according to claim 5, characterized by The detection circuit comprises an input power line, a voltage dividing circuit, a current transformer, a resistor, an operational amplifier, a comparator, a logic control unit and a relay; the input power line is connected to a brake power supply system, the voltage dividing circuit is connected in parallel to the input power line; the current transformer is connected in series to the brake power supply circuit, and a secondary side of the current transformer is connected with the resistor; the operational amplifier is connected with the voltage dividing circuit and the current transformer through the resistor; the comparator is connected with the output terminal of the operational amplifier, and the logic control unit is connected with the output terminal of the comparator; The relay is connected with the control output terminal of the logic control unit, and the contact of the relay is connected in series to the brake power supply circuit.

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