Emergency power supply switching device and electronic equipment

Abstract

The utility model discloses an emergency power supply switching device and electronic equipment. The emergency power supply switching device comprises an input power supply switching module and a relay contact switching module, wherein the input power supply switching module outputs a first power supply and outputs a second power supply when a second power supply input end does not receive the first power supply and receives the second power supply; when the relay contact switching module does not receive the first power supply, the third power supply output end is switched to be communicated with the second power supply and outputs the second power supply to the input power supply switching module. According to the technical scheme, through the arrangement of the input power supply switching module and the relay contact switching module, rapid switching between the main power supply and the emergency power supply is achieved; and the elevator can be timely connected to the emergency power supply when the main power supply fails, so that the safety and the reliability of the system are improved.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to an emergency power switching device and electronic equipment. Background Technology

[0002] In modern buildings, elevators, as an important vertical transportation tool, are crucial for reliability and safety. However, in power supply systems, due to grid failures or unexpected power outages, elevators may stop operating due to loss of power supply, leaving passengers stranded inside the elevator car and potentially causing safety accidents. Therefore, designing a device capable of quickly switching emergency power is a necessary technical means to improve the operational reliability and safety of elevators in emergencies. Traditional elevator emergency power switching devices typically require complex control circuits to switch between main power and emergency power, and the switching process may cause brief power interruptions or switching delays, which not only affect the normal operation of the elevator but may also introduce system instability. Furthermore, some existing switching devices are complex in design and cumbersome in installation and commissioning, making it difficult to meet the rapid response requirements of practical applications. Utility Model Content

[0003] This utility model provides an emergency power switching device and electronic equipment to solve the above-mentioned technical problems.

[0004] The first aspect of this utility model provides an emergency power switching device, comprising:

[0005] The input power switching module includes a first power input terminal, a second power input terminal, a first power output terminal and a second power output terminal. When the first power input terminal receives the first power, the first power is output from the first power output terminal and the second power output terminal respectively. When the first power input terminal does not receive the first power and the second power input terminal receives the second power, the second power is output from the second power output terminal.

[0006] A relay contact switching module includes a third power input terminal, a fourth power input terminal, and a third power output terminal. The third power input terminal is connected to the first power output terminal, and the third power output terminal is connected to the second power input terminal. The fourth power input terminal receives the second power. When the third power input terminal does not receive the first power, the third power output terminal switches to the fourth power input terminal to output the second power to the second power input terminal.

[0007] Optionally, the emergency power switching device further includes:

[0008] The motherboard power switching module includes a fifth power input terminal and a fourth power output terminal. The fifth power input terminal is connected to the second power output terminal, and the fourth power output terminal is connected to the motherboard to supply power to the motherboard according to the first power supply or the second power supply.

[0009] Optionally, the emergency power switching device further includes:

[0010] The PG card power switching module includes a sixth power input terminal, a seventh power input terminal, and a fifth power output terminal. The sixth power input terminal is connected to the first power input terminal, the seventh power input terminal is connected to the second power input terminal, and the fifth power output terminal is connected to the PG card to supply power to the PG card according to the first power supply or the second power supply.

[0011] Optionally, the input power switching module includes a first varistor, a second varistor, a first diode, a second diode, and a third diode. One end of the first varistor, the anode of the first diode, and the anode of the second diode are all connected to form the first power input terminal. The other end of the first varistor and one end of the second varistor are all connected to form a ground terminal. The other end of the second varistor and the anode of the third diode are all connected to form the second power input terminal. The cathode of the first diode is the first power output terminal, and the cathodes of the second diode and the third diode are all connected to form the second power output terminal.

[0012] Optionally, the motherboard power switching module is a step-down circuit, which converts the first power supply or the second power supply into a first voltage to supply power to the motherboard.

[0013] Optionally, the PG card power switching module includes a third varistor, a fourth varistor, a fourth diode, and a fifth diode. One end of the third varistor and the anode of the fourth diode are connected together as the sixth power input terminal. The other end of the third varistor and one end of the fourth varistor are connected together as the ground terminal. The other end of the fourth varistor and the anode of the fifth diode are connected together as the seventh power input terminal. The cathodes of the fourth diode and the fifth diode are connected together as the fifth power output terminal.

[0014] Optionally, the relay contact switching module includes a relay coil and a first switching switch. One end of the relay coil is the third power input terminal, and the other end of the relay coil is grounded. The common terminal of the first switching switch is the third power output terminal, the first switching terminal of the first switching switch is the fourth power input terminal, and the second switching terminal of the first switching switch is left floating.

[0015] Optionally, the emergency power switching device further includes a power failure detection module, and the relay contact switching module further includes a second switching switch. The common terminal of the second switching switch receives a second voltage. The first switching terminal of the second switching switch is connected to the input terminal of the power failure detection module, the second switching terminal of the second switching switch is left floating, and the output terminal of the power failure detection module is connected to the motherboard.

[0016] Optionally, the emergency power switching device further includes an auxiliary power module, which includes an eighth power input terminal, a sixth power output terminal, and a seventh power output terminal. The eighth power input terminal is connected to the first power input terminal, the sixth power output terminal is connected to the motherboard, and the seventh power output terminal is connected to the PG card.

[0017] A second aspect of this utility model provides an electronic device, including the emergency power switching device described in the first aspect.

[0018] The technical advantages of this utility model embodiment are as follows: This technical solution, by setting up an input power switching module and a relay contact switching module, achieves rapid switching between the main power supply and the emergency power supply, ensuring that the elevator can promptly connect to the emergency power supply in the event of a main power supply failure, thereby improving the safety and reliability of the system. At the same time, this device simplifies circuit design, reduces system complexity and maintenance costs, and has strong practicality and promotional value. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the first structure of an emergency power switching device provided in Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the second structure of an emergency power switching device provided in Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the third structure of an emergency power switching device provided in Embodiment 1 of this utility model;

[0023] Figure 4 This is a circuit diagram of the input power switching module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0024] Figure 5This is a circuit diagram of the motherboard power switching module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0025] Figure 6 This is a circuit diagram of the PG card power switching module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0026] Figure 7 This is a schematic diagram of the first structure of the relay contact switching module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0027] Figure 8 This is a schematic diagram of the fourth structure of an emergency power switching device provided in Embodiment 1 of this utility model;

[0028] Figure 9 This is a schematic diagram of the second structure of the relay contact switching module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0029] Figure 10 This is a circuit diagram of a relay contact switching module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0030] Figure 11 This is a circuit diagram of a power failure detection module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0031] Figure 12 This is a fifth structural schematic diagram of an emergency power switching device provided in Embodiment 1 of this utility model;

[0032] Figure 13 This is a circuit diagram of the auxiliary power module in an emergency power switching device provided in Embodiment 1 of this utility model;

[0033] Figure 14 This is a structural schematic diagram of an elevator provided in Embodiment 1 of this utility model;

[0034] In the diagram: 101, Input power switching module; 102, Relay contact switching module; 103, Mainboard power switching module; 104, PG card power switching module; 105, Power failure detection module; 106, Auxiliary power module; 121, Relay coil; 122, First switching switch; 123, Second switching switch; 20, Mainboard; 30, PG card. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0036] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0037] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0038] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0039] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0040] Example 1

[0041] This embodiment provides an emergency power switching device, such as... Figure 1 As shown, it includes:

[0042] The input power switching module 101 includes a first power input terminal I1, a second power input terminal I2, a first power output terminal U1, and a second power output terminal U2. When the first power input terminal I1 receives the first power V1, the first power V1 is output from the first power output terminal U1 and the second power output terminal U2 respectively. When the first power input terminal I1 does not receive the first power V1 and the second power input terminal I2 receives the second power V2, the second power V2 is output from the second power output terminal U2.

[0043] The relay contact switching module 102 includes a third power input terminal I3, a fourth power input terminal I4, and a third power output terminal U3. The third power input terminal I3 is connected to the first power output terminal U1, and the third power output terminal U3 is connected to the second power input terminal I2. The fourth power input terminal I4 receives the second power V2. When the third power input terminal I3 does not receive the first power V1, the third power output terminal U3 switches to connect to the fourth power input terminal I4 to output the second power V2 to the second power input terminal I2.

[0044] The input power switching module 101 connects to two power inputs in the elevator system and automatically switches outputs based on the power status. When the first power source (normal mains power V1) is connected, the input power switching module 101 outputs power from the first power output terminal U1 and the second power output terminal U2, ensuring the system operates under normal power supply conditions. If the first power source is disconnected, the input power switching module 101 automatically switches to the second power source (emergency power V2) and supplies power to the system through the second power output terminal U2, ensuring automatic switching to emergency power supply mode in the event of a power outage. The automatic switching function of the input power switching module 101 achieves a smooth transition between normal power and emergency power, ensuring a seamless switch to emergency power during a power outage and guaranteeing the elevator's continuous power supply capability in the event of a power outage. The relay contact switching module 102 is used to control the transmission of power switching signals. When normal mains power is supplied, the relay contact switching module 102 maintains the existing connection. When the third power input terminal I3 does not receive the first power supply V1 (i.e., power outage state), the relay contact switching module 102 will switch the third power output terminal U3 to the second power supply V2, thereby outputting emergency power to the second power input terminal I2. The relay contact switching module 102 ensures, through relay switching, that the power input is quickly switched to the emergency power path when the mains power fails, achieving automatic switching and ensuring continuous power supply.

[0045] The technical advantages of the solution provided in this embodiment are as follows: by setting up an input power switching module and a relay contact switching module, rapid switching between the main power supply and the emergency power supply can be achieved, ensuring that the elevator can promptly connect to the emergency power supply in the event of a main power supply failure, thereby improving the safety and reliability of the system. At the same time, this device simplifies circuit design, reduces system complexity and maintenance costs, and has strong practicality and promotional value.

[0046] As one implementation method, such as Figure 2 As shown, based on Embodiment 1, the emergency power switching device further includes:

[0047] The motherboard power switching module 103 includes a fifth power input terminal I5 and a fourth power output terminal U4. The fifth power input terminal I5 is connected to the second power output terminal U2, and the fourth power output terminal U4 is connected to the motherboard to supply power to the motherboard according to the first power supply or the second power supply.

[0048] The mainboard power switching module 103 provides power to the elevator mainboard. When the first power source switches to the second power source, this module supplies power to the mainboard according to the input conditions. When the mains power is normal, the mainboard power switching module 103 is directly powered by the first power source. When a mains power failure is detected, the mainboard power switching module 103 automatically switches to the second power source and continuously supplies power to the mainboard through the fourth power output terminal U4. The mainboard power switching module 103 ensures that the elevator mainboard receives stable power support under both normal and power outage conditions, especially maintaining the operation of the elevator mainboard during a power outage, enabling it to continuously display the elevator's speed and direction information, and meeting emergency rescue requirements.

[0049] As one implementation method, such as Figure 3 As shown, based on Embodiment 1, the emergency power switching device further includes:

[0050] The PG card power switching module 104 includes a sixth power input terminal I6, a seventh power input terminal I7, and a fifth power output terminal U5. The sixth power input terminal I6 is connected to the first power input terminal I1, the seventh power input terminal I7 is connected to the second power input terminal I2, and the fifth power output terminal U5 is connected to the PG card to supply power to the PG card according to the first power supply or the second power supply.

[0051] The PG card power switching module 104 provides power to the PG card. PG (Pulse Generator) cards are typically used to measure rotational speed. In frequency converters, the PG card is part of the vector frequency converter, capable of converting and isolating signals from encoders with different output forms, adapting the output to the controller's signal. The main types of outputs include: level conversion, analog-to-digital conversion, optocoupler isolation, and signal shaping. Under normal operating conditions, the first power source, powered by mains electricity, supplies power to the PG card through this module. When mains power fails, the module automatically switches to the second power input terminal I2 and supplies power to the PG card through the fifth power output terminal U5, ensuring normal operation in emergency situations. The PG card power switching module 104 implements the emergency power switching function for the PG card, ensuring that the PG card still receives a stable power supply during power outages, maintaining its operating state and meeting the emergency function requirements of the elevator during power outages.

[0052] The technical advantage of this implementation is that, through the coordinated operation of the aforementioned modules, the elevator's emergency power switching device ensures continuous power supply to critical components such as the mainboard and PG card. Especially in the event of a mains power outage, it can automatically switch to emergency power, ensuring the stable operation of the elevator mainboard and PG card, supporting continuous display of elevator speed and direction, and meeting national emergency rescue standards. This design not only enhances the elevator's safety during power outages but also improves its reliability and emergency response capabilities during operation.

[0053] As one implementation method, such as Figure 4 As shown, the input power switching module 101 includes a first varistor R1, a second varistor R2, a first diode D1, a second diode D2, and a third diode D3. One end of the first varistor R1, the anode of the first diode D1, and the anode of the second diode D2 are connected together to form the first power input terminal I1. The other end of the first varistor R1 and one end of the second varistor R2 are connected together to form the ground terminal. The other end of the second varistor R2 and the anode of the third diode D3 are connected together to form the second power input terminal I2. The cathode of the first diode D1 is the first power output terminal U1, and the cathodes of the second diode D2 and the third diode D3 are connected together to form the second power output terminal U2.

[0054] M24-MCM is powered by an external switching power supply during normal mains operation, while M12-MCM is a continuously available 12V emergency power supply. The first varistor R1 primarily provides surge protection for the first power input terminal I1 to prevent voltage surges from impacting the circuit. If an overvoltage occurs in the mains, the first varistor R1 will quickly conduct, discharging excess voltage to the ground terminal, protecting downstream circuitry from impact. When the mains fails, the first varistor R1 is inactive. The second varistor R2 provides surge protection for the second power input terminal I2, preventing voltage surges during emergency power supply startup and protecting the circuit. When the mains is normal, the second varistor R2 is inactive. When the mains fails, the second varistor R2 begins operation after the emergency power supply is connected. If an overvoltage occurs, the second varistor R2 will conduct, discharging the overvoltage to the ground terminal, protecting the system. The first diode D1 provides a normal power path to the first power output terminal U1 (M24B) during normal mains operation, while also preventing power backflow. When the power grid is normal, the first diode D1 is forward-biased, providing the first power supply (24V) to M24B to maintain the normal system voltage. Due to the diode's forward voltage drop, the output voltage is slightly lower than 24V. When the power grid fails, the first diode D1 stops conducting, preventing emergency power from flowing back to the first power supply path. The second diode D2 provides a power path to the second power supply output terminal U2 (M24A) and prevents power backflow when the power grid is normal. When the power grid is normal, the second diode D2 is forward-biased, providing 24V to M24A. The output voltage is 24V minus the diode's forward voltage drop, ensuring the system operates under normal power grid conditions. When the power grid fails, the second diode D2 loses its conducting condition, cutting off the path and preventing emergency power from flowing back to the grid. The third diode D3 conducts when the power grid fails, providing an emergency power path to the second power supply output terminal U2 (M24A), ensuring the system receives emergency power support during power outages. When the power grid is normal, the third diode D3 is not conducting, and the emergency power supply does not participate in power supply; the power grid provides normal power. When the power grid fails, the third diode D3 conducts in the forward direction, and M24A is connected to the emergency power supply (M12-MCM), providing a voltage of 12V minus the diode's forward voltage drop, thus entering emergency power supply mode and ensuring the elevator's basic functions.

[0055] The technical advantages of this implementation are as follows: The power switching module, through surge protection provided by the first and second varistors, ensures voltage stability for both normal and emergency power supplies, reducing the risk of damage from voltage fluctuations. By utilizing the forward conduction characteristics of the first, second, and third diodes, automatic switching between the mains power and emergency power is achieved, ensuring a seamless transition to emergency power in the event of a mains power outage, thus guaranteeing continuous system operation. This design enables the elevator system to operate stably and safely under different power supply conditions, meeting national standards for power outage emergency rescue.

[0056] In one implementation, the motherboard power switching module 103 is a step-down circuit, which converts the first power supply or the second power supply into a first voltage to supply power to the motherboard.

[0057] Among them, such as Figure 5 As shown, the step-down circuit can be a BUCK power supply circuit, used to convert the input voltage (whether it's the normal 24V from the mains or the 12V from the power supply) to the first voltage M5V required by the motherboard, ensuring its normal operation under different power supply conditions. When the mains power is normal, the M24A-MCM is close to 24V. The BUCK power supply circuit steps down the input 24V voltage to a stable 5V (M5V-MCM) and provides power to the motherboard, allowing it to continue operating under normal conditions. In the event of a mains power failure, the power switching module switches the input voltage to emergency power, where the M24A-MCM is closest to 12V. The BUCK power supply circuit can still step down the 12V input to 5V (M5V-MCM), providing a stable 5V voltage to the motherboard and ensuring the motherboard's emergency functions operate normally during power outages.

[0058] The technical advantage of this implementation is that, through the design of the step-down circuit, the mainboard power switching module realizes the step-down conversion between mains power supply and emergency power supply, providing a stable 5V output voltage for the elevator system under different power conditions, and ensuring the reliability and safety of the system.

[0059] As one implementation method, such as Figure 6 As shown, the PG card power switching module 104 includes a third varistor R3, a fourth varistor R4, a fourth diode D4, and a fifth diode D5. One end of the third varistor R3 and the anode of the fourth diode D4 are connected together to form the sixth power input terminal I6. The other end of the third varistor R3 and one end of the fourth varistor R4 are connected together to form the ground terminal. The other end of the fourth varistor R4 and the anode of the fifth diode D5 are connected together to form the seventh power input terminal I7. The cathodes of the fourth diode D4 and the fifth diode D5 are connected together to form the fifth power output terminal U5.

[0060] The third varistor, R3, is used for surge protection at the sixth power input terminal I6 to prevent damage to the circuit due to voltage surges or sudden changes during normal mains power supply. When the mains voltage fluctuates or experiences a momentary overvoltage, the third varistor R3 quickly conducts, discharging the remaining voltage to ground to protect the circuit. When the mains power fails and the circuit switches to emergency power, the third varistor R3 stops working and ceases its protective function. The fourth varistor, R4, is used for surge protection at the seventh power input terminal I7 to ensure voltage stability during emergency power supply and prevent damage to the circuit from sudden voltage spikes. Under normal mains power conditions, the fourth varistor R4 is not conducting. During a power failure, if a sudden voltage surge or change occurs, the fourth varistor R4 quickly conducts, discharging the overvoltage to ground to protect the PG card. The fourth diode, D4, conducts during normal mains power supply, providing a stable 24V output to the fifth power terminal. Simultaneously, the fourth diode D4 prevents reverse current flow, avoiding power path interference. When the power grid is normal, diode D4 conducts normally, supplying the 24V grid voltage to the fifth power output terminal U5+24V1, ensuring the PG card functions normally when powered by the grid. When the grid fails, diode D4 stops conducting to prevent power from flowing back to the grid. Diode D5 is used for emergency power supply after a grid failure, providing 12V to the PG card to ensure its normal operation during power outages. D5 also prevents power from flowing back to the grid. When the grid is normal, diode D5 does not conduct because the system prioritizes grid power. When the grid fails, diode D5 conducts normally, supplying the attenuated voltage of the emergency power supply M12 (12V) to the fifth power output terminal U5+24V1, allowing the PG card to continue operating during power outages.

[0061] The technical advantages of this implementation are as follows: Surge protection provided by the third and fourth varistors ensures the safety of both mains power and emergency power supply, effectively preventing power fluctuations from affecting the system. This module ensures a stable power supply to the PG card, meeting its normal operating requirements and guaranteeing the emergency rescue function of the elevator system.

[0062] As one implementation method, such as Figure 7 As shown, the relay contact switching module 102 includes a relay coil 121 and a first switching switch 122. One end of the relay coil 121 is the third power input terminal I3, and the other end of the relay coil 121 is grounded. The common terminal of the first switching switch 122 is the third power output terminal U3. The first switching terminal of the first switching switch 122 is the fourth power input terminal I4, and the second switching terminal I8 of the first switching switch 122 is left floating.

[0063] The main function of relay coil 121 is to detect the state of the third power input terminal I3 and control the switching of the first switching switch 122 according to the power status, thereby realizing the automatic switching between grid power supply and emergency power supply. When the grid is normal, the third power input terminal I3 provides grid voltage (24V) to relay coil 121, which is energized and generates a magnetic field, causing the relay to be in the energized state. When the grid fails, there is no voltage at the third power input terminal I3, the relay coil 121 loses power and is de-energized, the magnetic field disappears, and the relay resets. The function of the first switching switch 122 is to switch the power path to ensure that the system automatically switches between grid power supply and emergency power supply. The common terminal of the first switching switch 122 is connected to the third power output terminal U3 to provide a power path to downstream modules; the first switching terminal is connected to the emergency power supply, and the second switching terminal is left floating. When the grid is normal, relay coil 121 is energized, the first switching switch 122 remains in the reset state, at which time the third power output terminal U3 is connected to the grid power supply (third power input terminal I3), and the system uses grid power supply normally. When the power grid fails, the relay coil 121 is de-energized, the first switching switch 122 switches to the first switching terminal, and the third power output terminal U3 is automatically connected to the emergency power supply (12V) to provide emergency power to the system and ensure the continuous operation of the system in the event of a power outage.

[0064] The technical advantage of this implementation is that the relay contact switching module, through the cooperation of the relay coil and the first switching switch, can automatically switch between mains power supply and emergency power supply. When the mains power is normal, the relay coil is energized, and the mains power is used normally; when the mains power fails, the relay coil is de-energized, and the first switching switch switches to emergency power supply, providing continuous power support. This design achieves rapid power switching, ensures emergency operation capability in the event of a power outage, and ensures the safety and reliability of the elevator system.

[0065] As one implementation method, such as Figure 8 and Figure 9 As shown, the emergency power switching device also includes a power failure detection module 105, and the relay contact switching module 102 also includes a second switching switch 123. The common terminal I9 of the second switching switch 123 receives a second voltage, the first switching terminal I10 of the second switching switch 123 is connected to the input terminal of the power failure detection module 105, the second switching terminal I11 of the second switching switch 123 is left floating, and the output terminal of the power failure detection module 105 is connected to the motherboard.

[0066] The power failure detection module 105 detects the power failure status of the mains power supply and sends a signal to the motherboard when a power failure is detected to trigger corresponding emergency operations (such as switching power or entering a low-power mode). When the mains power is normal, the input terminal of the power failure detection module 105 is left floating via the second switch 123. Since the mains power supply is normal, the power failure detection module 105 does not output a power failure signal to the motherboard. When the mains power fails, the input terminal of the power failure detection module 105 is connected to a second voltage source via the second switch 123. The power failure detection module 105 detects the second voltage source, immediately generates a power failure signal, and outputs it to the motherboard, notifying the motherboard to enter emergency mode and switch to emergency power, ensuring that the motherboard's emergency functions are activated.

[0067] The technical advantage of this embodiment is that the combination of the power failure detection module and the second switching switch forms an efficient power failure detection mechanism. When a power failure is detected, the power failure detection module quickly notifies the motherboard. This design improves the response speed and reliability of the emergency power switching device and provides timely emergency support for the motherboard in the event of a sudden power outage.

[0068] As an example, such as Figure 10 and Figure 11 As shown, the relay contact switching module 102 includes a relay coil L, a first relay switch, a second relay switch, a third relay switch, and a fourth relay switch. The first relay switch includes a common contact 1b, a switching contact 1a, and a switching contact 1c. The common contact 1b is connected to MCM, the switching contact 1a is connected to GND, and the switching contact 1c is connected to TEST. The second relay switch includes a common contact 2b, a switching contact 2a, and a switching contact 2c. The common contact 2b is connected to M5V, the switching contact 2a is connected to VTEST, and the switching contact 2c is left floating. The third relay switch includes a common contact 3b, a switching contact 3a, and a switching contact 3c. The common contact 3b is connected to GND, the switching contact 3a is connected to COM, and the switching contact 3c is left floating. The fourth relay switch includes a common contact 4b, a switching contact 4a, and a switching contact 4c. The common contact 4b is connected to M12, the switching contact 4a is connected to M12V, and the switching contact 4c is left floating.

[0069] The power failure detection module 105 includes a fifth resistor R5, a sixth resistor R6, and a first capacitor C1. One end of the fifth resistor R5 is the input terminal of the power failure detection module 105. The other end of the fifth resistor R5, one end of the sixth resistor R6, and one end of the first capacitor C1 are connected to the output terminal of the power failure detection module 105. The other end of the sixth resistor R6 and the other end of the first capacitor C1 are connected to ground.

[0070] The relay coil L is supplied with a voltage range of 18V-30V. When the power grid is normal, M24B-MCM is at 24V, relay coil L is energized, and all four single-pole double-throw contacts switch. Common contact 1b switches from connection switching contact 1a to connection switching contact 1c, i.e., TEST = MCM; common contact 2b switches from connection switching contact 2a to connection switching contact 2c, and VTEST switches from M5V to floating, i.e., from 5V to 0V; common contact 3b switches from connection switching contact 3a to connection switching contact 3c, and GND and COM are disconnected; common contact 4b switches from connection switching contact 4a to connection switching contact 4c, and M12 and M12V are disconnected. When the power grid is normal, VTEST is 0V. After voltage division by the fifth resistor R5 and the sixth resistor R6, TEST is still 0V. The main board detects normal power grid operation through the TEST terminal.

[0071] When the mains power fails, M24B-MCM is at 12V, relay coil L is open, and all four single-pole double-throw contacts are in their default state. Common contact 1b switches from connection switching contact 1c to connection switching contact 1a, i.e., GND = MCM; common contact 2b switches from connection switching contact 2c to connection switching contact 2a, VTEST = M5V, i.e., 5V voltage; common contact 3b switches from connection switching contact 3c to connection switching contact 3a, GND = COM; common contact 4b switches from connection switching contact 4c to connection switching contact 4a, M12 = M12V. When the mains power fails, VTEST is 5V, and after voltage division by the fifth resistor R5 and the sixth resistor R6, TEST is 3.3V; therefore, the motherboard determines that the mains power has failed based on the TEST signal level.

[0072] As one implementation method, such as Figure 12 As shown, the emergency power switching device also includes an auxiliary power module 106. The auxiliary power module 106 includes an eighth power input terminal, a sixth power output terminal, and a seventh power output terminal. The eighth power input terminal is connected to the first power input terminal I1, the sixth power output terminal is connected to the motherboard, and the seventh power output terminal is connected to the PG card.

[0073] The auxiliary power module 106 provides a stable power supply to the motherboard and PG card under normal grid power conditions. This module works in conjunction with the inverter auxiliary power source and the LDO chip to ensure that the power requirements of the motherboard and PG card are met. When the grid is normal, the auxiliary power module 106 receives a 24V input voltage from the first power input terminal I1 and distributes it to the motherboard and PG card through the inverter auxiliary power source. When the grid fails, the power supply to the motherboard and PG card switches to emergency power, and the auxiliary power module 106 loses its input power.

[0074] As one implementation method, such as Figure 13As shown, the auxiliary power supply module 106 includes an inverter auxiliary power source SMPS and an LDO chip. The input terminal of the inverter auxiliary power source SMPS is the eighth power input terminal. The first output terminal of the inverter auxiliary power source SMPS is connected to the input terminal of the LDO chip. The output terminal of the LDO chip is the sixth power output terminal. The second output terminal of the inverter auxiliary power source SMPS is the seventh power output terminal.

[0075] The main function of the inverter auxiliary power supply (SMPS) is to convert the 24V mains voltage into multiple different output voltages to meet the different voltage requirements of the motherboard and PG card, and to provide pre-processed voltage for the LDO chip. The SMPS converts the 24V input voltage and outputs a voltage suitable for further regulation by the LDO chip through its first output terminal, providing the motherboard with the final stable voltage. Simultaneously, it directly provides a specific voltage (such as the 24V voltage suitable for the PG card) through its second output terminal, ensuring that the PG card can directly obtain stable power support when the mains power is normal. The LDO chip (Low Dropout Linear Regulator) is used to further precisely regulate the voltage output from the inverter auxiliary power supply to provide a stable, low-noise power supply to the motherboard. The LDO chip receives the voltage from the first output terminal of the inverter auxiliary power supply and performs linear regulation on the input voltage. The LDO chip outputs a stable, low-noise voltage (e.g., 5V) to the motherboard to ensure that the motherboard's stringent power quality requirements are met.

[0076] The technical advantages of this implementation are as follows: the auxiliary power module, through the coordinated operation of the inverter auxiliary power supply and the LDO chip, provides suitable voltage division and regulation power to the motherboard and PG card. The inverter auxiliary power supply effectively converts and distributes the 24V voltage to the motherboard and PG card, meeting the voltage requirements of different devices, while the LDO chip further provides a low-noise, stable power supply to the motherboard. This design ensures the system's power stability and efficiency when the mains power supply is normal, supports equipment operation under high-efficiency and low-interference conditions, and allows seamless switching to emergency power during power outages, thereby ensuring the system's reliability and continuity.

[0077] Combination Figure 4 , Figure 5 , Figure 6 , Figure 10 , Figure 11 by Figure 13 The circuit diagram provided illustrates the following circuit structure and its operation:

[0078] When the power grid is normal, both the external power supply and the bus voltage are normal. The TEST input to the motherboard MCU is 0V, and the motherboard recognizes that the power grid is normal. The auxiliary power module 106 outputs +5V / +3.3V to power the motherboard, outputs +24V to power the PG card, and the M5V-MCM to power external communication is working normally. The elevator is working normally.

[0079] When the power grid fails, both the external power supply and the bus voltage are lost. The TEST connected to the motherboard MCU is 3.3V, and the motherboard recognizes the power grid failure (only displaying the elevator speed and direction). M24B loses power, M24A is 12V, M5V-MCM which supplies power to the motherboard is equal to the system's +5V-GND, and +24V1-COM which supplies power to the PG card is equal to M12-MCM. Both the PG card and the motherboard can work normally. Therefore, it can meet the standard requirements for emergency 12V trolley rescue during power outages.

[0080] Example 2

[0081] This second embodiment provides an electronic device, such as... Figure 14 As shown, it includes the emergency power switching device, motherboard, and PG card provided in Embodiment 1.

[0082] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. An emergency power switching device, characterized by The application relates to an emergency power switching device. The input power switching module comprises a first power input end, a second power input end, a first power output end and a second power output end; when the first power input end receives the first power, the first power output end and the second power output end respectively output the first power; and when the first power input end does not receive the first power and the second power input end receives the second power, the second power output end outputs the second power. The relay contact switching module comprises a third power input end, a fourth power input end and a third power output end; the third power input end is connected with the first power output end; the third power output end is connected with the second power input end; the fourth power input end receives the second power; and when the third power input end does not receive the first power, the third power output end switches to be connected with the fourth power input end to output the second power to the second power input end.

2. The emergency power transfer device of claim 1, wherein, The emergency power switching device further comprises: The mainboard power switching module comprises a fifth power input end and a fourth power output end; the fifth power input end is connected with the second power output end; and the fourth power output end is connected with a mainboard to supply power to the mainboard according to the first power or the second power.

3. Emergency power switching device according to claim 1 or 2, characterized in that The emergency power switching device further comprises: The PG card power switching module comprises a sixth power input end, a seventh power input end and a fifth power output end; the sixth power input end is connected with the first power input end; the seventh power input end is connected with the second power input end; and the fifth power output end is connected with a PG card to supply power to the PG card according to the first power or the second power.

4. The emergency power transfer device of claim 1, wherein, The input power switching module comprises a first pressure-sensitive resistor, a second pressure-sensitive resistor, a first diode, a second diode and a third diode; one end of the first pressure-sensitive resistor, an anode of the first diode and an anode of the second diode are connected together as the first power input end; the other end of the first pressure-sensitive resistor and one end of the second pressure-sensitive resistor are connected together as a ground terminal; the other end of the second pressure-sensitive resistor and an anode of the third diode are connected together as the second power input end; a cathode of the first diode is the first power output end; and a cathode of the second diode and a cathode of the third diode are connected together as the second power output end.

5. The emergency power transfer device of claim 2, wherein, The mainboard power switching module is a voltage reduction circuit which converts the first power or the second power into a first voltage to supply power to the mainboard.

6. The emergency power transfer device of claim 3, wherein, The PG card power switching module comprises a third pressure-sensitive resistor, a fourth pressure-sensitive resistor, a fourth diode and a fifth diode; one end of the third pressure-sensitive resistor and an anode of the fourth diode are connected together as the sixth power input end; the other end of the third pressure-sensitive resistor and one end of the fourth pressure-sensitive resistor are connected together as a ground terminal; the other end of the fourth pressure-sensitive resistor and an anode of the fifth diode are connected together as the seventh power input end; and a cathode of the fourth diode and a cathode of the fifth diode are connected together as the fifth power output end.

7. The emergency power transfer device of claim 1, wherein The relay contact switching module comprises a relay coil and a first switching switch, one end of the relay coil is the third power input end, the other end of the relay coil is grounded, the common end of the first switching switch is the third power output end, the first switching end of the first switching switch is the fourth power input end, and the second switching end of the first switching switch is suspended.

8. The emergency power transfer device of claim 7, wherein, The emergency power switching device further comprises a power failure detection module, the relay contact switching module further comprises a second switching switch, the common end of the second switching switch receives a second voltage, the first switching end of the second switching switch is connected with the input end of the power failure detection module, the second switching end of the second switching switch is suspended, and the output end of the power failure detection module is connected with the mainboard.

9. The emergency power transfer device of claim 2, wherein, The emergency power switching device further comprises an auxiliary power module, the auxiliary power module comprises an eighth power input end, a sixth power output end and a seventh power output end, the eighth power input end is connected with the first power input end, the sixth power output end is connected with the mainboard, and the seventh power output end is connected with the PG card.

10. An electronic device, comprising: The emergency power switching device comprises any one of claims 1 to 9.

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