Emergency release power supply circuit and device

Abstract

The application relates to an emergency brake release power supply circuit and equipment. The circuit comprises a control module, a switching component, a first power supply circuit and a second power supply circuit; the control module turns on the connection between the first power supply circuit, the second power supply circuit and the corresponding interface equipment through the switching component, so that, in the case of normal power supply, the control module controls the first power supply circuit to supply power to the equipment standby battery, and in the case of monitoring the corresponding signal, the control module controls the first power supply circuit to provide power supply for the equipment control system, and controls the second power supply circuit to supply power to the brake holding coil; in the case of abnormal power supply, if the corresponding signal is monitored, the equipment standby battery provides power supply for the equipment control system through a DC-DC converter, and the control module controls the first power supply circuit to supply power to the brake holding coil through the switching component. Thus, the application simplifies the circuit, realizes the cost reduction through the reuse and normalization of the circuit.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to an emergency power release circuit and device. Background Technology

[0002] Currently, the emergency brake release power supply uses an independent power supply unit. The power supply circuit and the battery circuit form a 1+1 backup through a combining control (charge and discharge relay), providing power to the equipment control system via a DC-DC converter (Direct Current). Simultaneously, the brake release power supply circuit adopts a 1+1 backup configuration of mains mode and battery mode. Furthermore, the DC-DC section in mains mode uses a high-cost isolated converter, and based on the brake power characteristics available on the market, it generally employs a two-transistor forward converter, a two-transistor flyback converter, a half-bridge, or a full-bridge topology. In addition, the DC-DC section in battery mode also uses a high-cost isolated converter, generally employing push-pull or full-bridge topologies.

[0003] Traditional emergency power supplies suffer from complex circuitry, redundant design, and an inability to meet increasingly stringent cost requirements. Summary of the Invention

[0004] Therefore, it is necessary to provide an emergency release power supply circuit and device that can simplify the circuit and reduce the cost in order to address the above-mentioned technical problems.

[0005] In a first aspect, this application provides an emergency brake release power circuit, which includes: a control module, a switching component, a first power supply circuit, and a second power supply circuit;

[0006] The control module is connected to the control terminal of the switching component, the control terminal of the first power supply circuit, and the control terminal of the second power supply circuit. The control module is used to monitor the functional power start signal and the brake release power start signal. The first terminal of the second power supply circuit is used to connect to the mains power supply interface, and the second terminal of the second power supply circuit is used to connect to the brake coil. The first terminal of the first power supply circuit is used to connect to the mains power supply interface and to connect to the brake coil. The second terminal of the first power supply circuit is used to connect to the brake coil through the equipment's backup battery and to connect to the equipment control system through the DC-DC converter.

[0007] When the mains power supply is normal, the control module connects the first end of the first power supply circuit to the mains power supply interface through the switching component, and controls the first power supply circuit to supply power to the equipment's backup battery; when the control module detects the function power start signal, it starts the DC-DC converter so that the first power supply circuit provides power to the equipment control system through the DC-DC converter; when the control module detects the brake release power start signal, it connects the second end of the second power supply circuit to the brake coil through the switching component, and controls the second power supply circuit to supply power to the brake coil.

[0008] In the event of an abnormal mains power supply, if the control module detects a function power start signal, it will start the DC-DC converter so that the equipment's backup battery can provide power to the equipment control system through the DC-DC converter; if the control module detects a brake release power start signal, it will connect the first end of the first power supply circuit to the brake coil through the switching component, and control the first power supply circuit to supply power to the brake coil through the equipment's backup battery.

[0009] In one embodiment, when the mains power supply is normal, the control module controls the first power supply circuit to step down the mains bus voltage to supply power to the equipment's backup battery; the control module controls the second power supply circuit to step down the mains bus voltage to supply power to the brake coil.

[0010] In the event of an abnormality in the mains power supply, the control module controls the first power supply circuit to boost the voltage of the equipment's backup battery in order to supply power to the brake coil.

[0011] In one embodiment, the switching component includes a switching relay connected to the control module;

[0012] The control module controls the switching relay to connect the corresponding contacts to switch the connection between the first end of the first power supply circuit and the mains power supply interface, the connection between the second end of the second power supply circuit and the brake coil, the connection between the first end of the first power supply circuit and the brake coil, and to switch the connection between the equipment's backup battery and the brake coil.

[0013] In one embodiment, the first power supply circuit includes a first switching assembly and a first energy storage unit;

[0014] The control terminal of the first switching assembly is connected to the control module. The control module is used to control the on / off sequence of the corresponding switches in the first switching assembly to step down the mains bus voltage and step up the voltage of the equipment's backup battery. One end of the first energy storage unit is connected to the mains power supply interface through the first switching assembly, and the other end is used to connect to the brake coil through the equipment's backup battery and to connect to the equipment control system through the DC-DC converter.

[0015] The second power supply circuit includes a second switching assembly and a second energy storage unit; the control terminal of the second switching assembly is connected to a control module, which is used to control the on / off sequence of the corresponding switches in the second switching assembly to step down the mains bus voltage; one end of the second energy storage unit is connected to the mains power supply interface through the second switching assembly, and the other end is used to connect to the brake coil.

[0016] In one embodiment, the first switching assembly includes a first MOSFET and a second MOSFET, and the first energy storage unit is a first inductor;

[0017] The source of the first MOSFET is connected to the AC power supply interface and the brake coil via a switching component. The drain of the first MOSFET is connected to one end of the first inductor and the drain of the second MOSFET. The gate of the first MOSFET is connected to the control module. The drain of the second MOSFET is connected to one end of the first inductor. The gate of the second MOSFET is connected to the control module. The source of the second MOSFET is used to connect to one end of the device's backup battery. The other end of the first inductor is used to connect to the other end of the device's backup battery.

[0018] The second switching assembly includes a third MOSFET and a fourth MOSFET, and the second energy storage unit is a second inductor;

[0019] The brake coil is connected to the source of the fourth MOSFET and the source of the second MOSFET via a switching assembly. The source of the fourth MOSFET is used to connect to one end of the equipment's backup battery, and the source of the second MOSFET is also used to connect to one end of the equipment's backup battery. The brake coil is connected to one end of the second inductor, and the other end of the second inductor is connected to the drain of the third MOSFET and the drain of the fourth MOSFET. The source of the third MOSFET is used to connect to the AC power supply interface, and the gate of the third MOSFET is connected to the control module. The source of the fourth MOSFET is used to connect to one end of the equipment's backup battery, and the gate of the fourth MOSFET is connected to the control module.

[0020] In one embodiment,

[0021] The circuit also includes a system auxiliary power source and a mains power detection unit; one end of the system auxiliary power source is used to connect to the device's backup battery, and the other end is used to connect to the control module; one end of the mains power detection unit is used to connect to the mains power supply interface, and the other end is used to connect to the control module.

[0022] The control module is used to determine whether the mains power supply is normal or abnormal through the mains power detection unit.

[0023] In one embodiment, the circuit further includes a filter circuit and a rectifier circuit;

[0024] The input terminal of the filter circuit is used to connect to the mains power supply interface, and the output terminal of the filter circuit is connected to the input terminal of the rectifier circuit. The output terminal of the rectifier circuit is connected to the first terminal of the first power supply circuit and the first terminal of the second power supply circuit respectively through the switching component.

[0025] In one embodiment, the rectifier circuit is a rectifier bridge; the filter circuit is an EMI filter circuit.

[0026] The input terminal of the EMI filter circuit is connected to the mains power supply interface. One of the output terminals of the EMI filter circuit is connected to the first input terminal of the rectifier bridge, and the other output terminal is connected to the second input terminal of the rectifier bridge. The first output terminal of the rectifier bridge is connected to the first terminal of the second power supply circuit and to the first terminal of the first power supply circuit through a switching component. The second output terminal of the rectifier bridge is used to connect to the brake coil through the switching component and to connect to the equipment control system through the DC-DC converter.

[0027] Secondly, this application also provides an emergency brake release power supply device, which includes the aforementioned emergency brake release power supply circuit; the emergency brake release power supply device also includes a brake coil, a DC-DC converter, an equipment control system, and an equipment backup battery;

[0028] The first end of the second power supply circuit is used to connect to the mains power supply interface, and the second end of the second power supply circuit is connected to the brake coil; the first end of the first power supply circuit is connected to the mains power supply interface and the brake coil, and the second end of the first power supply circuit is connected to the brake coil through the equipment's backup battery and to the equipment control system through a DC-DC converter.

[0029] In one embodiment, the emergency release power supply circuit further includes an electrolytic capacitor; the rectifier circuit is a rectifier bridge;

[0030] The positive terminal of the electrolytic capacitor is connected to the first output terminal of the rectifier bridge, and the negative terminal of the electrolytic capacitor is connected to the second output terminal of the rectifier bridge.

[0031] The aforementioned emergency brake release power supply circuit and device utilize a switching component to connect the first and second power supply circuits to their respective interface devices. Under normal mains power conditions, the control module controls the first power supply circuit to power the device's backup battery. Upon detecting a functional power-on signal, the first power supply circuit provides power to the device control system via a DC-DC converter. Furthermore, upon detecting a brake release power-on signal, the control module controls the second power supply circuit to power the brake coil. In the event of an abnormal mains power supply, if a functional power-on signal is detected, the control module activates the DC-DC converter, allowing the device's backup battery to power the device control system via the DC-DC converter. If a brake release power-on signal is detected, the control module controls the first power supply circuit to power the brake coil via the device's backup battery. This application simplifies the circuitry and reduces costs through circuit reuse and normalization. Based on this application, the emergency brake release power supply circuit can be reused, with mains mode and battery mode brake release circuits forming a 1+1 backup, saving analog chips. Simultaneously, digital control can be achieved, simplifying the control logic. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A block diagram of a traditional emergency brake release power supply circuit;

[0034] Figure 2 A schematic diagram of a traditional emergency brake release power supply circuit;

[0035] Figure 3 Diagram showing the types of brakes used in traditional emergency brake release power supplies;

[0036] Figure 4 This is a block diagram of the emergency release power supply circuit in one embodiment;

[0037] Figure 5 This is a block diagram of the emergency release power supply circuit in another embodiment;

[0038] Figure 6 This is a circuit block diagram of an emergency release power supply circuit in one embodiment;

[0039] Figure 7 This is a schematic diagram of the system auxiliary source and mains power detection unit in the emergency release power supply circuit in one embodiment;

[0040] Figure 8 This is a schematic diagram of a filter and rectifier circuit in an emergency power supply circuit in one embodiment;

[0041] Figure 9 This is a circuit block diagram of an emergency power release device in one embodiment. Detailed Implementation

[0042] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0044] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0045] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0046] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0047] like Figure 1As shown, traditional emergency brake release power supplies use independent power supplies. The power supply circuit and battery circuit form a 1+1 backup through a combining control (charge and discharge relay). Power is supplied to the equipment control system (e.g., elevator control system) via a DC-DC converter. The DC-DC converter is still basically a high-cost isolated converter, and the basic circuit topology still uses a flyback circuit. The circuit is triggered by an external control signal RUN1 (the function power start button is pressed). In addition, the brake release power supply circuit adopts a 1+1 backup form of AC power mode and battery mode. Currently, the DC-DC section in AC power mode still uses a high-cost isolated converter. Based on the brake power characteristics on the market, it basically uses a two-transistor forward, two-transistor flyback, half-bridge, or full-bridge topology. The DC-DC section in battery mode also uses a high-cost isolated converter, basically using push-pull, full-bridge, etc. The circuit is triggered by an external control signal RUN2 (the brake release power start button is pressed). Figure 2 As shown, the cumbersome circuit architecture in traditional emergency power supply circuits greatly increases the cost of components.

[0048] Furthermore, such as Figure 3 As shown, traditional emergency brake release power supplies are also limited by the duty cycle (transformer turns ratio) of the converter control chip and the increasing number of brake types (the type of brake is related to the opening current). The same elevator manufacturer often has a wide variety of brake release power supply types, resulting in huge material and management costs.

[0049] This application relates to an emergency brake release power supply circuit and device, which is fully compatible with all functions of existing solutions while realizing digital control of the brake release power supply, making the control logic simpler; the circuit is simplified, and cost reduction is achieved through circuit reuse and normalization. The charger reuses the brake release power supply circuit, and the AC power mode and battery mode brake release circuits form a 1+1 backup, which saves a lot of analog chips; at the same time, the brake release power supply circuit realizes digital control, making the control logic simpler.

[0050] The emergency brake release power supply circuit provided in this application embodiment can be applied to elevator systems. In one embodiment, an emergency brake release power supply circuit is provided, which may include: a control module 410, a switching component 420, a first power supply circuit 430, and a second power supply circuit 440;

[0051] The control module 410 is connected to the control terminal of the switching component 420, the control terminal of the first power supply circuit 430, and the control terminal of the second power supply circuit 440. The control module 410 is used to monitor the function power start signal and the brake release power start signal. The first end of the second power supply circuit 440 is used to connect to the mains power supply interface, and the second end of the second power supply circuit 440 is used to connect to the brake coil. The first end of the first power supply circuit 430 is used to connect to the mains power supply interface and to connect to the brake coil. The second end of the first power supply circuit 430 is used to connect to the brake coil through the equipment's backup battery and to connect to the equipment control system through a DC-DC converter.

[0052] When the mains power supply is normal, the control module 410 connects the first end of the first power supply circuit 430 to the mains power supply interface through the switching component 420, and controls the first power supply circuit 430 to supply power to the equipment's backup battery; when the control module 420 detects a function power start signal, it starts the DC-DC converter so that the first power supply circuit 430 provides power to the equipment control system through the DC-DC converter; when the control module 410 detects a brake release power start signal, it connects the second end of the second power supply circuit 440 to the brake coil through the switching component 420, and controls the second power supply circuit 440 to supply power to the brake coil.

[0053] In the event of an abnormal mains power supply, if the control module 410 detects a function power start signal, it will start the DC-DC converter so that the equipment backup battery can provide power to the equipment control system through the DC-DC converter; if the control module 410 detects a brake release power start signal, it will connect the first end of the first power supply circuit 430 to the brake coil through the switching component 420, and control the first power supply circuit 430 to supply power to the brake coil through the equipment backup battery.

[0054] Specifically, an AC power supply interface can refer to an interface used to receive AC power input. For example... Figure 4 As shown, under normal mains power supply conditions, the first power supply circuit 430 is connected to the mains power supply interface through the switching component 420 to receive mains power input, thereby powering the equipment's backup battery. At the same time, the control module 410 synchronously monitors for the presence of a functional power start signal and a brake release power start signal. The DC-DC converter only starts when the functional power start signal is detected. When the control module 410 detects the brake release power start signal, the second power supply circuit 440 receives mains power input through the switching component 420, thereby powering the brake coil. In the event of abnormal mains power supply, there is no mains power input, and the equipment relies on the backup battery for power supply. Similarly, the DC-DC converter only starts when the functional power start signal is detected.

[0055] Furthermore, the function power start signal can be understood as being issued when the function power start button (external button) is pressed, such as the control signal RUN1; for example, the brake release power start signal can be understood as being issued when the brake release power start button (external button) is pressed, such as the control signal RUN2.

[0056] Compared to traditional emergency power supplies, this application eliminates the need for a charger, numerous analog chips, and complex analog peripheral control circuits, potentially saving over 20% in costs. If both the DC-DC converter and the equipment system power converter are non-isolated, the cost reduction will be even greater.

[0057] In one embodiment, when the mains power supply is normal, the control module controls the first power supply circuit to step down the mains bus voltage to supply power to the equipment's backup battery; the control module controls the second power supply circuit to step down the mains bus voltage to supply power to the brake coil.

[0058] In the event of an abnormality in the mains power supply, the control module controls the first power supply circuit to boost the voltage of the equipment's backup battery in order to supply power to the brake coil.

[0059] Specifically, under normal mains power supply conditions, the control module connects the first end of the first power supply circuit to the mains power supply interface via the switching component, controlling the first power supply circuit to step down the mains bus voltage to supply power to the equipment's backup battery. When the control module detects a brake release power-on signal, it connects the second end of the second power supply circuit to the brake coil via the switching component, controlling the second power supply circuit to step down the mains bus voltage to supply power to the brake coil. In the event of an abnormal mains power supply, if the control module detects a brake release power-on signal, it connects the first end of the first power supply circuit to the brake coil via the switching component, controlling the first power supply circuit to boost the voltage of the equipment's backup battery to supply power to the brake coil.

[0060] In one embodiment, the first power supply circuit 430 may include a first switching assembly 510 and a first energy storage unit 520;

[0061] The control terminal of the first switch assembly 510 is connected to the control module. The control module is used to control the on / off sequence of the corresponding switches in the first switch assembly 510 to step down the mains bus voltage and step up the voltage of the equipment backup battery. One end of the first energy storage unit 520 is connected to the mains power supply interface through the first switch assembly 510, and the other end is used to connect to the brake coil through the equipment backup battery and to connect to the equipment control system through the DC-DC converter.

[0062] The second power supply circuit 440 includes a second switch assembly 530 and a second energy storage unit 540; the control terminal of the second switch assembly 530 is connected to a control module, which is used to control the on / off sequence of the corresponding switches in the second switch assembly 530 to step down the mains bus voltage; one end of the second energy storage unit 540 is connected to the mains power supply interface through the second switch assembly 530, and the other end is used to connect to the brake coil.

[0063] Specifically, such as Figure 5 As shown, the switching component can be a component with a conduction function, such as a MOSFET or a diode, and the energy storage unit can be a unit with an energy storage function, such as an inductor; further, this application uses MOSFETs and inductors as examples for illustration.

[0064] In one embodiment, the first switching assembly includes a first MOSFET (Q1) and a second MOSFET (Q2), and the first energy storage unit is a first inductor (L1).

[0065] The source of the first MOSFET (Q1) is connected to the mains power supply interface and the brake coil via a switching component. The drain of the first MOSFET (Q1) is connected to one end of the first inductor (L1) and the drain of the second MOSFET (Q2). The gate of the first MOSFET (Q1) is connected to the control module. The drain of the second MOSFET (Q2) is connected to one end of the first inductor (L1). The gate of the second MOSFET (Q2) is connected to the control module. The source of the second MOSFET (Q2) is used to connect to one end of the device's backup battery. The other end of the first inductor (L1) is used to connect to the other end of the device's backup battery.

[0066] The second switching assembly includes a third MOSFET (Q3) and a fourth MOSFET (Q4), and the second energy storage unit is a second inductor (L2);

[0067] The brake coil is connected to the source of the fourth MOSFET (Q4) and the source of the second MOSFET (Q2) via a switching assembly. The source of the fourth MOSFET (Q4) is connected to one end of the equipment's backup battery, and the source of the second MOSFET (Q2) is also connected to one end of the equipment's backup battery. The brake coil is connected to one end of the second inductor (L2), and the other end of the second inductor (L2) is connected to the drain of the third MOSFET (Q3) and the drain of the fourth MOSFET (Q4). The source of the third MOSFET (Q3) is connected to the AC power supply interface, and the gate of the third MOSFET (Q3) is connected to the control module. The source of the fourth MOSFET (Q4) is connected to one end of the equipment's backup battery, and the gate of the fourth MOSFET (Q4) is connected to the control module.

[0068] Specifically, such as Figure 6As shown, under normal mains power supply, the emergency release power circuit enters mains power mode by switching the connection between the first terminal of the first power supply circuit and the mains power supply interface. The control module controls the first MOSFET (Q1) to turn on first. After the first MOSFET (Q1) turns off, the freewheeling second MOSFET (Q2) turns on, thereby controlling the first power supply circuit to step down the mains bus voltage to supply power to the equipment's backup battery. When the control module detects the function power start signal (RUN1), it starts the DC-DC converter. The control module controls the first power supply circuit to step down the mains bus voltage to supply power to the equipment's backup battery and simultaneously supply power to the DC-DC converter. When the control module detects the release power start signal (RUN2), it switches the connection between the second terminal of the second power supply circuit and the brake coil, controlling the third MOSFET (Q3) to turn on first. After the third MOSFET (Q3) turns off, the freewheeling fourth MOSFET (Q2) turns on. The MOSFET (Q4) is turned on, thereby controlling the second power supply circuit to step down the mains bus voltage to supply power to the brake coil. In the event of an abnormal mains power supply, the emergency release power circuit enters battery mode. If the control module detects the function power start signal (RUN1), it starts the DC-DC converter so that the first power supply circuit provides power to the equipment control system through the DC-DC converter. If the control module detects the release power start signal (RUN2), it connects the first terminal of the first power supply circuit to the brake coil through the switching component, controls the second MOSFET (Q2) to turn on first, and then turns on the first MOSFET (Q1), thereby controlling the first power supply circuit to boost the voltage of the equipment's backup battery to supply power to the brake coil. The control module is signal-connected to the switching component (as shown by the arrow in the figure), and the gates of the first, second, third, and fourth MOSFETs are all connected to the control module (not shown in the figure).

[0069] Furthermore, the first MOSFET, the second MOSFET, the third MOSFET, and the fourth MOSFET are all NMOS transistors, and the control module can be a chip with control functions, such as a CPU or an MCU. In this application, an MCU will be used as an example for illustration.

[0070] It should be noted that an MCU (Microcontroller Unit), also known as a single-chip microcomputer or microcontroller, is a chip-level computer that integrates a central processing unit (CPU) with a reduced frequency and specifications. It combines peripheral interfaces such as memory, counters, USB (Universal Serial Bus), A / D converter, UART (Universal Asynchronous Receiver / Transmitter), PLC (Programmable Logic Controller), DMA (Direct Memory Access), and even LCD (Liquid Crystal Display) driver circuitry onto a single chip. This allows for different combinations of control for various applications.

[0071] Thanks to the use of digital power supplies, this application employs an MCU for sampling and closed-loop control. The MCU can achieve a duty cycle of 0-100%, significantly increasing the one-to-many gate capability of the power supply during shutdown, enabling automatic adjustment over a wide current and voltage range. Furthermore, this application greatly simplifies the power supply circuitry, achieving specific circuit requirements with a streamlined design. This application enables the reuse of charger and shutdown circuits, standardizes the architecture of AC and battery modes, and implements a 1+1 backup method for AC and battery modes, similar to existing solutions, thus reducing costs.

[0072] In one embodiment, the switching component includes a switching relay connected to the control module;

[0073] The control module controls the switching relay to connect the corresponding contacts to switch the connection between the first end of the first power supply circuit and the mains power supply interface (S2), the connection between the second end of the second power supply circuit and the brake coil (S3), the connection between the first end of the first power supply circuit and the brake coil (S1), and the connection between the backup battery of the equipment and the brake coil (S4).

[0074] Specifically, a relay can refer to an automatic switching element with isolation function. Further, a relay includes an electromagnetic system and a contact system. The electromagnetic system consists of a coil, a fixed iron core, and a movable armature. The contact system consists of moving contacts and stationary contacts. When the input quantity of the relay's electromagnetic system coil reaches a threshold, the iron core generates magnetic force under electromagnetic action, attracting the armature. The armature drives the moving contact of the contact system to actuate, causing the contacts to close or open, thus changing the on / off state of the circuit connected to the contact system. The on / off state of the contacts is controlled according to the change in the input quantity of the electromagnetic system coil. When the coil input quantity reaches the threshold, the normally open contact will close, and the normally closed contact will open, thereby changing the operating state of the circuit connected to the contacts. This application uses a switching relay as an example for explanation, where S1, S2, S3, and S4 can be implemented using corresponding contact types.

[0075] Furthermore, such as Figure 6 As shown, under normal mains power supply, the control module controls the first power supply circuit to step down the mains bus voltage through the switching component S2 to supply power to the equipment's backup battery. When the control module detects a functional power-on signal, it starts the DC-DC converter so that the first power supply circuit provides power to the equipment control system through the DC-DC converter. That is, while the control module supplies power to the equipment's backup battery through the switching component, it also controls the first power supply circuit to step down the mains bus voltage through the switching component S2 to supply power to the DC-DC converter. When the control module detects a brake release power-on signal, it controls the second power supply circuit to step down the mains bus voltage through the switching component S3 to supply power to the brake coil.

[0076] In the event of an abnormal mains power supply, if the control module detects a function power start signal (RUN1), it will start the DC-DC converter so that the equipment's backup battery can provide power to the equipment control system through the DC-DC converter. When the control module detects a brake release power start signal (RUN2), it will switch S1 and S4 to control the first power supply circuit to supply power to the brake coil through the equipment's backup battery.

[0077] It should be noted that S3 and S4 form a double insurance function. If either S3 or S4 fails, the brake coil will still have a circuit to conduct, which can prevent the mains power and battery power from clashing and causing backflow, which could damage the power supply. This does not affect the function of the release power circuit, further reducing the failure rate of the release power circuit and lowering the overall cost of the release power circuit throughout its life cycle.

[0078] In one embodiment, the circuit further includes a system auxiliary power source and a mains power detection unit; one end of the system auxiliary power source is used to connect to the device's backup battery, and the other end is used to connect to the control module; one end of the mains power detection unit is used to connect to the mains power supply interface, and the other end is used to connect to the control module.

[0079] The control module is used to determine whether the mains power supply is normal or abnormal through the mains power detection unit.

[0080] Specifically, such as Figure 7 As shown, the system auxiliary power source draws power from the device's backup battery and outputs 12V and 5V through a linear IC (Integrated Circuit Chip). The 12V power supply provides power to conventional chips and other ICs, while the 5V flows into the MCU. The system auxiliary power source is connected to the MCU signal (indicated by the arrow in the figure) to power the MCU. It is necessary to select a suitable linear IC according to the actual situation. The mains power detection unit can also be used to detect the mains power supply status. The MCU can determine whether the mains power supply is normal or abnormal through the mains power detection unit.

[0081] In one embodiment, the circuit further includes a filter circuit and a rectifier circuit;

[0082] The input terminal of the filter circuit is used to connect to the mains power supply interface, and the output terminal of the filter circuit is connected to the input terminal of the rectifier circuit. The output terminal of the rectifier circuit is connected to the first terminal of the first power supply circuit and the first terminal of the second power supply circuit respectively through the switching component.

[0083] Specifically, a filter circuit can refer to a circuit that allows signal components within a certain frequency range to pass through normally while blocking other frequency components from passing through, such as an EMI filter circuit; a rectifier circuit can refer to a circuit that converts AC power into DC power, such as a rectifier bridge or a half-wave rectifier circuit. This application uses an EMI filter circuit and a rectifier bridge as examples for illustration.

[0084] In one embodiment, the rectifier circuit is a rectifier bridge; the filter circuit is an EMI filter circuit.

[0085] The input terminal of the EMI filter circuit is connected to the mains power supply interface. One of the output terminals of the EMI filter circuit is connected to the first input terminal of the rectifier bridge, and the other output terminal is connected to the second input terminal of the rectifier bridge. The first output terminal of the rectifier bridge is connected to the first terminal of the second power supply circuit and to the first terminal of the first power supply circuit through a switching component. The second output terminal of the rectifier bridge is used to connect to the brake coil through the switching component and to connect to the equipment control system through the DC-DC converter.

[0086] Specifically, such as Figure 8As shown, the EMI filter circuit has two input terminals and two output terminals, which can effectively suppress power grid noise, improve the anti-interference capability of electronic equipment and the reliability of the system; the rectifier bridge has a first input terminal and a second input terminal for connecting the AC input power supply, and a first output terminal and a second output terminal for outputting DC power. The rectifier bridge is used to convert AC power into DC power.

[0087] In one embodiment, this application also provides an emergency brake release power supply device, which includes the above-described emergency brake release power supply circuit; the emergency brake release power supply device also includes a brake coil, a DC-DC converter, a device control system, and a device backup battery;

[0088] The first end of the second power supply circuit is used to connect to the mains power supply interface, and the second end of the second power supply circuit is connected to the brake coil; the first end of the first power supply circuit is connected to the mains power supply interface and the brake coil, and the second end of the first power supply circuit is connected to the brake coil through the equipment's backup battery and to the equipment control system through a DC-DC converter.

[0089] Specifically, the emergency release power supply device can refer to a machine roomless elevator, which is equipped with an emergency release power supply to level the floor and release people in case of elevator malfunction; and based on the embodiments of this application, an emergency release power supply circuit can be configured for the machine roomless elevator.

[0090] For example, the equipment control system can refer to the elevator control system, and the emergency release power supply circuit in this application embodiment can supply power to the elevator control system.

[0091] In one embodiment, the emergency release power supply circuit further includes an electrolytic capacitor; the rectifier circuit is a rectifier bridge;

[0092] The positive terminal of the electrolytic capacitor is connected to the first output terminal of the rectifier bridge, and the negative terminal of the electrolytic capacitor is connected to the second output terminal of the rectifier bridge.

[0093] The above, such as Figure 9 As shown, this application describes the application of this circuit to an emergency power release device in both the embodiment of this application and the previous embodiment. This application is fully compatible with all functions of existing solutions while achieving digital control of the power release device, making the control logic simpler. The circuitry is simplified, and cost reduction is achieved through circuit reuse and normalization. The charger reuses the power release circuit, with the AC mode and battery mode power release circuits forming a 1+1 backup, saving many analog chips. Simultaneously, thanks to the full coverage of the MCU's duty cycle, the possibility of one-to-many switching can be realized, thereby reducing the management cost of the power release device. The power release circuit achieves digital control, making the control logic simpler.

[0094] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An emergency brake release power supply circuit, characterized in that, The circuit includes: a control module, a switching component, a first power supply circuit, and a second power supply circuit; the control module is connected to the control terminal of the switching component, the control terminal of the first power supply circuit, and the control terminal of the second power supply circuit; the control module is used to monitor the functional power start signal and the brake release power start signal; wherein, the first terminal of the second power supply circuit is used to connect to the mains power supply interface, and the second terminal of the second power supply circuit is used to connect to the brake coil; the first terminal of the first power supply circuit is used to connect to the mains power supply interface and to connect to the brake coil, and the second terminal of the first power supply circuit is used to connect to the brake coil through the equipment's backup battery and to connect to the equipment control system through a DC-DC converter; When the mains power supply is normal, the control module connects the first end of the first power supply circuit to the mains power supply interface through the switching component, controlling the first power supply circuit to supply power to the device's backup battery; when the control module detects the function power start signal, it starts the DC-DC converter so that the first power supply circuit provides power to the device control system through the DC-DC converter; when the control module detects the brake release power start signal, it connects the second end of the second power supply circuit to the brake coil through the switching component, controlling the second power supply circuit to supply power to the brake coil. In the event of an abnormal mains power supply, if the control module detects the function power start signal, it activates the DC-DC converter so that the equipment backup battery provides power to the equipment control system through the DC-DC converter; if the control module detects the brake release power start signal, it connects the first end of the first power supply circuit to the brake coil through the switching component, and controls the first power supply circuit to supply power to the brake coil through the equipment backup battery. When the mains power supply is normal, the control module controls the first power supply circuit to step down the mains bus voltage to supply power to the equipment's backup battery; the control module controls the second power supply circuit to step down the mains bus voltage to supply power to the brake coil. In the event of an abnormality in the mains power supply, the control module controls the first power supply circuit to boost the voltage of the equipment's backup battery in order to supply power to the brake coil.

2. The emergency release power supply circuit according to claim 1, characterized in that, The switching component includes a switching relay connected to the control module; The control module controls the switching relay to connect corresponding contacts to switch the connection between the first end of the first power supply circuit and the mains power supply interface, to switch the connection between the second end of the second power supply circuit and the brake coil, to switch the connection between the first end of the first power supply circuit and the brake coil, and to switch the connection between the equipment backup battery and the brake coil.

3. The emergency release power supply circuit according to any one of claims 1 or 2, characterized in that, The first power supply circuit includes a first switching assembly and a first energy storage unit; The control terminal of the first switching assembly is connected to the control module. The control module is used to control the on / off sequence of the corresponding switches in the first switching assembly to step down the mains bus voltage and step up the voltage of the equipment's backup battery. One end of the first energy storage unit is connected to the mains power supply interface through the first switching assembly, and the other end is used to connect to the brake coil through the equipment's backup battery and to connect to the equipment control system through the DC-DC converter. The second power supply circuit includes a second switching assembly and a second energy storage unit; the control terminal of the second switching assembly is connected to the control module, and the control module is used to control the on / off sequence of the corresponding switches in the second switching assembly to step down the mains bus voltage; one end of the second energy storage unit is connected to the mains power supply interface through the second switching assembly, and the other end is used to connect to the brake coil.

4. The emergency brake release power supply circuit according to claim 3, characterized in that, The first switching assembly includes a first MOSFET and a second MOSFET, and the first energy storage unit is a first inductor; The source of the first MOSFET is connected to the AC power supply interface and the brake coil via the switching component. The drain of the first MOSFET is connected to one end of the first inductor and the drain of the second MOSFET. The gate of the first MOSFET is connected to the control module. The drain of the second MOSFET is connected to one end of the first inductor. The gate of the second MOSFET is connected to the control module. The source of the second MOSFET is used to connect to one end of the device's backup battery. The other end of the first inductor is used to connect to the other end of the device's backup battery. The second switching assembly includes a third MOSFET and a fourth MOSFET, and the second energy storage unit is a second inductor; The brake coil is connected to the source of the fourth MOSFET and the source of the second MOSFET via the switching assembly. The source of the fourth MOSFET is connected to one end of the device's backup battery, and the source of the second MOSFET is also connected to one end of the device's backup battery. The brake coil is connected to one end of the second inductor, and the other end of the second inductor is connected to the drain of the third MOSFET and the drain of the fourth MOSFET. The source of the third MOSFET is connected to the AC power supply interface, and the gate of the third MOSFET is connected to the control module. The source of the fourth MOS transistor is connected to one end of the device's backup battery, and the gate of the fourth MOS transistor is connected to the control module.

5. The emergency brake release power supply circuit according to claim 1, characterized in that, The circuit also includes a system auxiliary power source and a mains power detection unit; one end of the system auxiliary power source is used to connect to the device's backup battery, and the other end is used to connect to the control module; one end of the mains power detection unit is used to connect to the mains power supply interface, and the other end is used to connect to the control module. The control module is used to determine whether the mains power supply is normal or abnormal through the mains power detection unit.

6. The emergency release power supply circuit according to claim 1, characterized in that, The circuit also includes a filter circuit and a rectifier circuit; The input terminal of the filter circuit is connected to the mains power supply interface, and the output terminal of the filter circuit is connected to the input terminal of the rectifier circuit; the output terminal of the rectifier circuit is connected to the first terminal of the first power supply circuit and the first terminal of the second power supply circuit respectively through the switching component.

7. The emergency release power supply circuit according to claim 6, characterized in that, The rectifier circuit is a rectifier bridge; the filter circuit is an EMI filter circuit. The input terminal of the EMI filter circuit is connected to the mains power supply interface. One output terminal of the EMI filter circuit is connected to the first input terminal of the rectifier bridge, and the other output terminal is connected to the second input terminal of the rectifier bridge. The first output terminal of the rectifier bridge is connected to the first terminal of the second power supply circuit and to the first terminal of the first power supply circuit through the switching component. The second output terminal of the rectifier bridge is used to connect to the brake coil through the switching component and to connect to the equipment control system through the DC-DC converter.

8. An emergency power release device, characterized in that, Includes the emergency release power circuit as described in claim 7; also includes a brake coil, a DC-DC converter, an equipment control system, and a backup battery; The first end of the second power supply circuit is used to connect to the mains power supply interface, and the second end of the second power supply circuit is connected to the brake coil; the first end of the first power supply circuit is connected to the mains power supply interface and the brake coil, and the second end of the first power supply circuit is connected to the brake coil through the equipment's backup battery and to the equipment control system through the DC-DC converter.

9. The emergency power release device according to claim 8, characterized in that, The emergency brake release power supply circuit also includes an electrolytic capacitor; the rectifier circuit is a rectifier bridge. The positive terminal of the electrolytic capacitor is connected to the first output terminal of the rectifier bridge, and the negative terminal of the electrolytic capacitor is connected to the second output terminal of the rectifier bridge.

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