Elevators, intelligent power supplies for multi-functional elevators and their conversion methods

Abstract

This invention discloses an elevator, a multi-functional elevator intelligent power supply, and a conversion method thereof. The multi-functional elevator intelligent power supply includes: a power frequency transformer for receiving AC power and converting its voltage before outputting; a control device; a brake control circuit for receiving the AC power output from the power frequency transformer and controlling the elevator brake under the control of the control device; a system power supply circuit for converting the AC power output from the power frequency transformer into DC power and supplying power to the control device; and a backup power supply for connecting to the system power supply circuit. When the power frequency transformer loses power, the backup power supply outputs DC power, which, after inversion and voltage conversion by the system power supply circuit, outputs at least one AC power supply and / or at least one DC power supply to power the elevator brake and control device respectively. This invention's intelligent elevator power supply improves the coordination between multiple power supply devices in an elevator.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to an intelligent power supply for elevators, multi-functional elevators, and their conversion methods. Background Technology

[0002] As existing elevator systems become increasingly feature-rich and have more diverse operating modes, multiple power supply units are being configured to power different functional modules, such as: main system power supply, holding brake power supply, ARD rescue power supply, and electric brake release power supply.

[0003] In existing elevators, each power supply is equipped with a separate logic control system, which makes it impossible for the power supplies to work in coordination, resulting in complex maintenance of each power supply; and the different logic systems cannot perform timing control, making the system prone to false alarms; in addition, the ARD rescue power supply and electric brake release power supply only work when the power grid input is abnormal, resulting in very low utilization rate, and there is a problem that multiple logic control systems compete for elevator control during the rescue process. Summary of the Invention

[0004] The main objective of this invention is to provide a multifunctional intelligent power supply, power supply device, and lifting equipment for elevators, aiming to solve the problem of poor coordination among multiple power supply devices.

[0005] To achieve the above objectives, the present invention proposes a multifunctional intelligent power supply for elevators, the multifunctional intelligent power supply for elevators comprising:

[0006] A power frequency transformer is used to connect to an AC power source and to perform voltage transformation on the connected AC power source before outputting the voltage.

[0007] Control device;

[0008] The brake control circuit is used to receive the AC power output from the power frequency transformer and to control the elevator brake to operate under the control of the control device.

[0009] The system power supply circuit is used to convert the AC power output from the power frequency transformer into DC power under the control of the control device, and to power the control device; and

[0010] A backup power supply is used to connect to the system power supply circuit. When the power frequency transformer loses power, it outputs DC power and, after being inverted and converted by the system power supply circuit, outputs at least one AC power supply and / or at least one DC power supply. The output AC power supply is output to the brake control circuit via the power frequency transformer, and the output DC power supply powers the control device.

[0011] Optionally, the system power supply circuit includes:

[0012] A bidirectional AC-DC converter circuit, having a first terminal and a second terminal, wherein the first terminal of the bidirectional AC-DC converter circuit is connected to the power frequency transformer; the bidirectional AC-DC converter circuit is used to convert the AC power output from the power frequency transformer into DC power and output it; and

[0013] The DC-DC conversion circuit has its input terminal connected to the second terminal of the bidirectional AC-DC conversion circuit, and its output terminal connected to the control device. The DC-DC conversion circuit is used to convert the DC power output from the bidirectional AC-DC conversion circuit into a voltage and then output it to the control device.

[0014] The backup power supply is connected to the common connection terminal of the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit; when the power frequency transformer loses power, the backup power supply outputs one AC power supply and one DC power supply respectively through the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit.

[0015] Specifically, the DC power output from the backup power supply is divided into two paths. One path is inverted into AC power by the bidirectional AC-DC conversion circuit and output to the brake control circuit via the power frequency transformer. The other path is converted into DC voltage and output to power the control device.

[0016] Optionally, the power frequency transformer includes: a first coil, a second coil, a third coil, and a fourth coil; the first coil is used to connect to the AC power supply; the second and third coils are connected to the brake control circuit to convert the AC power supply connected to the first coil into voltages and output them to the brake control circuit; the fourth coil is connected to the system power supply circuit to convert the AC power supply connected to the first coil into voltages and output them to the system power supply circuit.

[0017] The power frequency transformer is also used to convert the AC power supply connected to the fourth coil into voltage and output it to the brake control circuit via the third coil and the fourth coil when the power frequency transformer loses power.

[0018] Optionally, the DC-DC conversion circuit includes: a first DC-DC conversion circuit and a second DC-DC conversion circuit;

[0019] The first DC-DC conversion circuit is connected to the second terminal of the bidirectional AC-DC conversion circuit. The first DC-DC conversion circuit is used to convert the DC power output from the second terminal of the bidirectional AC-DC conversion circuit into a corresponding voltage and then output it. The first DC-DC conversion circuit is also used to convert the DC power output from the backup power supply into a DC voltage and then output it when the power frequency transformer loses power.

[0020] The second DC-DC conversion circuit is connected to the common terminal of the first DC-DC conversion circuit and the bidirectional AC-DC conversion circuit; the second DC-DC conversion circuit is used to convert the DC power output from the second terminal of the bidirectional AC-DC conversion circuit into a corresponding voltage and then output it; the second DC-DC conversion circuit is also used to convert the DC power output from the backup power supply into a DC voltage and then output it when the power frequency transformer loses power.

[0021] Optionally, the control device includes a main control device and an auxiliary control device; the power supply terminal of the main control device is connected to the output terminal of the first DC-DC conversion circuit, and the power supply terminal of the auxiliary control device is connected to the output terminal of the second DC-DC conversion circuit; the auxiliary control device is used to control the brake control circuit and the bidirectional AC-DC conversion circuit to work according to the power supply control signal received from the main control device.

[0022] Optionally, the multi-functional elevator intelligent power supply also includes:

[0023] A secondary rescue circuit is connected between the backup power supply and the system power supply circuit; the secondary rescue circuit is used to control the DC power input of the backup power supply during a secondary rescue based on the received key signal.

[0024] Optionally, the multi-functional elevator intelligent power supply also includes:

[0025] An emergency DC power supply circuit is provided, which is connected to the backup power supply. The emergency DC power supply circuit is used to output emergency DC power under the control of the control device when the power frequency transformer loses power.

[0026] Optionally, the multi-functional elevator intelligent power supply also includes:

[0027] An emergency AC power supply circuit is connected to the first coil of the power frequency transformer.

[0028] The power frequency transformer is also used to, when the power frequency transformer loses power, convert the AC power input to the fourth coil and output it from the first coil to the emergency AC power supply circuit after voltage transformation; the emergency AC power supply circuit is used to output emergency AC power under the control of the control device.

[0029] Optionally, the multi-functional elevator intelligent power supply also includes:

[0030] An LC filter circuit is connected between the power frequency transformer and the first terminal of the bidirectional AC-DC conversion circuit. The LC filter circuit is used to filter the AC power output from the fourth coil of the power frequency transformer and output it to the bidirectional AC-DC conversion circuit. The LC filter circuit is also used to filter the AC power output from the bidirectional AC-DC conversion circuit and output it to the power frequency transformer when the power frequency transformer loses power.

[0031] A bus capacitor pre-charging circuit is connected between the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit; the bus capacitor pre-charging circuit is used to pre-charge the DC bus capacitor under the control of the control device during the initial power-on of the multi-functional elevator intelligent power supply.

[0032] The present invention also proposes an elevator, which includes a frequency converter and a multi-functional intelligent elevator power supply as described above; the frequency converter is connected to the emergency DC power supply circuit.

[0033] The present invention also proposes a conversion method for a multi-functional elevator intelligent power supply, based on the multi-functional elevator intelligent power supply as described above; or, based on the elevator as described above.

[0034] The conversion method for the intelligent power supply of the multi-functional elevator includes the following steps:

[0035] When the power frequency transformer is energized, the power frequency transformer outputs two AC power supplies respectively. One AC power supply is output to the brake control circuit, and the other AC power supply is converted into DC power supply through the system power supply circuit and then output to the control device and the backup power supply respectively.

[0036] When the power frequency transformer loses power, the backup power supply outputs DC power, which is converted into at least one AC power and / or at least one DC power through the system power supply circuit. The AC power is output to the brake control circuit through the power frequency transformer, and the DC power is output to the control device.

[0037] Optionally, the step of having the power frequency transformer output two AC power supplies when energized, one AC power supply being output to the brake control circuit, and the other being converted to DC power by the system power supply circuit and then output to power the control device and the backup power supply respectively, includes:

[0038] When the power frequency transformer is energized, the power frequency transformer outputs two AC power supplies respectively;

[0039] One AC power supply is output to the brake control circuit; the other AC power supply is output to the bidirectional AC-DC conversion circuit in the system power supply circuit.

[0040] The other AC power supply is converted by the bidirectional AC-DC conversion circuit to output two DC power supplies. One DC power supply is output to the backup power supply, and the other DC power supply is output to the control device via the DC-DC conversion circuit.

[0041] Optionally, the other DC power supply is output to the control device via the DC-DC conversion circuit, specifically as follows:

[0042] The other DC power supply is output to the main control device and the auxiliary control device via the first DC-DC conversion circuit and the second DC-DC conversion circuit, respectively.

[0043] Optionally, when the power frequency transformer loses power, the backup power supply outputs DC power, which is then converted into at least one AC power and / or at least one DC power via the system power supply circuit. The AC power is output to the brake control circuit via the power frequency transformer, and the DC power is output to the control device. The steps include:

[0044] When the power frequency transformer loses power, the backup power supply outputs DC power.

[0045] The DC power supply is converted into at least one AC power supply via the bidirectional AC-DC conversion circuit, and the AC power supply is output to the brake control circuit via the power frequency transformer.

[0046] And / or, the AC power supply is converted into at least one DC power supply via the DC-DC conversion circuit, and the DC power supply is output to the control device.

[0047] Optionally, after the step of outputting DC power from the backup power supply, the conversion method of the multi-functional elevator intelligent power supply further includes:

[0048] The DC power supply is also output as an emergency DC power supply via the emergency DC power supply circuit.

[0049] The step of converting the DC power supply into at least one AC power supply via the bidirectional AC-DC conversion circuit, and outputting the AC power supply to the brake control circuit via the power frequency transformer, further includes:

[0050] The power frequency transformer also outputs an AC power supply, which is then used as an emergency DC power supply output via the emergency AC power supply circuit.

[0051] Optionally, after the step of the backup power supply outputting DC power when the power frequency transformer loses power, and converting it into at least one AC power supply and / or at least one DC power supply via the system power supply circuit, the AC power supply being output to the brake control circuit via the power frequency transformer, and the DC power supply being output to the control device, the method for converting the intelligent power supply of the multi-functional elevator further includes:

[0052] The backup power supply is also used to output at least one AC power supply to the brake control circuit via the system power supply circuit when the secondary rescue circuit receives a key signal; and / or, at least one DC power supply to the control device.

[0053] The multifunctional intelligent elevator power supply proposed in this invention comprises a power frequency transformer, a control device, a brake control circuit, a system power supply circuit, and a backup power supply. The power frequency transformer converts the incoming AC power into voltage before outputting it. Under the control of the control device, the brake control circuit and the system power supply circuit respectively convert the AC power output from the power frequency transformer into voltage for powering the elevator brake and control device during normal operation. Furthermore, when the power frequency transformer loses power, the DC power output from the backup power supply, after passing through the system power supply circuit, can be converted into at least one AC power supply and / or at least one DC power supply, which can be output to the brake control circuit and control device respectively to power ARD (Automatic Rescue Alert) and electric brake release rescue operations. The intelligent power supply for elevators of this invention integrates at least the brake power supply, system power supply, ARD rescue power supply, and electric brake release power supply into one unit, which is then coordinated and managed by a control device. This improves the coordination between multiple power supply units, facilitates maintenance, and enables unified control, thereby enhancing power supply stability and reducing the probability of false alarms. Furthermore, because the rescue power supply shares the same power supply structure as the normal power supply, it improves the utilization rate of the rescue power supply, significantly increases power supply integration, reduces equipment size, and lowers costs. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the functional modules of an embodiment of the multifunctional elevator intelligent power supply;

[0056] Figure 2 This is a schematic diagram of the circuit structure of one embodiment of the intelligent power supply for this multifunctional elevator;

[0057] Figure 3 This is a flowchart illustrating an embodiment of the multifunctional elevator intelligent power supply conversion method of the present invention;

[0058] Figure 4 This is a schematic flowchart of another embodiment of the intelligent power conversion method for multifunctional elevators according to the present invention;

[0059] Figure 5 This is a schematic flowchart of another embodiment of the intelligent power conversion method for multifunctional elevators according to the present invention;

[0060] Figure 6 This is a schematic flowchart of another embodiment of the intelligent power conversion method for multifunctional elevators according to the present invention;

[0061] Figure 7 This is a flowchart illustrating another embodiment of the intelligent power conversion method for multifunctional elevators according to the present invention.

[0062] Explanation of icon numbers:

[0063]

[0064]

[0065] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0066] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0067] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0070] This invention proposes a multifunctional intelligent power supply for elevators, which can be applied to lifting equipment such as elevators, lifts, and lifting platforms. To better illustrate this invention, the following embodiments use elevators as an example.

[0071] Reference Figures 1 to 2 In one embodiment of the present invention, the multifunctional elevator intelligent power supply includes:

[0072] The power frequency transformer 100 is used to connect to an AC power source and to perform voltage transformation on the connected AC power source before outputting the voltage.

[0073] Control device 200;

[0074] The brake control circuit 300 is used to receive the AC power output from the power frequency transformer 100 and to control the elevator brake to work under the control of the control device 200.

[0075] The system power supply circuit 400 is used to convert the AC power output from the power frequency transformer 100 into DC power under the control of the control device 200, and to supply power to the control device 200.

[0076] The backup power supply 500 is used to connect to the system power supply circuit 400. When the power frequency transformer 100 loses power, it outputs DC power and, after being inverted and converted by the system power supply circuit 400, outputs at least one AC power and / or at least one DC power. The output AC power is output to the brake control circuit 300 via the power frequency transformer 100, and the output DC power supplies the control device 200.

[0077] In this embodiment, the power frequency transformer 100 can be implemented using an isolation transformer or an autotransformer. The AC power supply connected to the power frequency transformer 100 can be mains AC power or AC voltage output from other AC power sources. When using an isolation transformer, one primary winding and multiple secondary windings can be configured. By adjusting the turns ratio of each secondary winding to the primary winding, different AC currents can be output. When using an autotransformer, the primary and secondary windings form a common winding. By setting multiple output terminals on the common winding, each output terminal can output different AC currents according to the turns ratio of the connected winding to the common winding. It is understood that when using an autotransformer, the output voltage of each output terminal can be adjusted in real time by setting sliding output terminals. The number of secondary windings and the turns ratio of each secondary winding are determined according to actual needs and are not limited here.

[0078] The control device 200 can be implemented using microprocessors such as MCU, DSP, or FPGA. Those skilled in the art can integrate some hardware circuits and software programs or algorithms into the control device 200. Various interfaces and lines can be used to connect the multi-functional elevator intelligent power supply and various functional modules in the elevator. By running or executing the software programs and / or modules in the control device 200, and by calling the data in the control device 200, various functions of the multi-functional elevator intelligent power supply and the elevator can be executed, thereby enabling overall monitoring of the multi-functional elevator intelligent power supply and the elevator, so that the multi-functional elevator intelligent power supply can meet the different power supply needs of the elevator under different conditions. For example, the control device 200 may integrate multiple voltage detection circuits, ADC conversion circuits, and filters. The voltage detection circuit can detect the AC voltage input to the power frequency transformer 100 through relevant ports of the control device 200 and output a corresponding voltage detection signal to the ADC conversion circuit. The ADC conversion circuit can convert the analog voltage detection signal into a digital signal and compare the converted digital voltage detection signal with a reference voltage signal in the memory to determine whether the power frequency transformer 100 is de-energized. When the condition is normal, the control device 200 controls the multi-functional elevator intelligent power supply to power the functional modules required for normal elevator operation, thereby controlling the corresponding modules to operate normally. When the condition is de-energized, the control device 200 controls the multi-functional elevator intelligent power supply to power the functional modules required for rescue operations, thereby controlling the corresponding functional modules to perform rescue actions.

[0079] The brake control circuit 300 can be implemented using multiple switching devices and a rectifier bridge. The switching devices can be one or more combinations of low-voltage AC relays and low-voltage AC contactors. Under the control of the control device 200, the brake control circuit 300 converts the received AC power and outputs it to the elevator's brake device, providing appropriate power to the brake device in different elevator operating states. For example, during normal elevator operation, the brake control circuit 300 can provide power to the elevator brake under the control of the control device 200, allowing the elevator to move to the corresponding floor; it can also disconnect the power supply under the control of the control device 200, causing the brake to engage and thus stopping the elevator at a designated floor.

[0080] The system power supply circuit 400 converts the AC power output from the power frequency transformer 100 into DC power to supply power to the control device 200. When the elevator is running normally, the system power supply circuit 400 supplies power to the microprocessor and functional circuits in the control device 200 that control the normal operation of the elevator, so as to maintain the normal operation of the elevator; for example, it supplies power to the lighting control circuit in the control device 200 so that the control device 200 can control the lighting brightness in the elevator according to time.

[0081] The backup power supply 500 can be implemented using a battery pack or other DC power sources. The backup power supply 500 is used to output DC power to the system power supply circuit 400 when the power grid fails or the primary side of the power frequency transformer 100 fails, causing the power frequency transformer 100 to lose power. In practical applications, the AC and DC power outputs of the system power supply circuit 400 are determined according to actual needs and are not limited here. The number of each power output should match the number of functional modules in the elevator that require emergency power supply when the power frequency transformer 100 loses power. In other optional embodiments, when the power frequency transformer 100 loses power, the DC power supply unit such as the control device 200 can also be powered by an independent backup DC power supply, or the AC power supply unit such as the brake control circuit 300 can also be powered by an independent AC backup power supply. Therefore, the system power supply circuit 400 can output at least one AC or DC power supply to power the corresponding DC / AC power supply unit. It is also understood that the control device can also include control units of various other functional modules that use different DC power supplies, and the brake control circuit can also include various functional modules that use different AC power supplies. The DC power output from the backup power supply 500 can be converted by the system power supply circuit 400 and output to the control device 200 to power the microprocessor required for rescue in the control device 200. This allows the control device 200 to run the stored relevant software / programs or algorithms to perform ARD rescue or electric brake release rescue. At this time, under the relevant program control of the control device 200, the system power supply circuit 400 can invert the DC power to AC power and output it to the brake control circuit 300 through the power frequency transformer 100, so that the elevator brake can perform corresponding actions according to the control signals of the control device 200 during ARD rescue or electric brake release rescue. Specifically: In ARD rescue, the control device 200 can control the brake control circuit 300 to supply power to the elevator brake according to the stored rescue program, so as to drive the elevator to the nearest floor. When the elevator arrives, the brake control circuit 300 disconnects the power supply to the elevator brake under the control of the control device 200, so that the elevator stops at the floor. After arrival, the control device 200 opens the elevator door to rescue the trapped passengers. In electric brake release rescue, the control device 200 controls the power supply status of the elevator brake according to the key signals input by professional rescuers, so as to control the elevator to stop at the designated location for rescue.

[0082] The multifunctional intelligent elevator power supply proposed in this invention comprises a power frequency transformer 100, a control device 200, a brake control circuit 300, a system power supply circuit 400, and a backup power supply 500. The power frequency transformer 100 converts the input AC power into voltage before outputting it. Under the control of the control device 200, the brake control circuit 300 and the system power supply circuit 400 respectively convert the AC power output from the power frequency transformer 100 into corresponding voltage changes to power the elevator brake and control device 200 during normal operation. When the power frequency transformer 100 loses power, the DC power output from the backup power supply 500 is converted into at least one AC power supply and / or at least one DC power supply through the system power supply circuit 400, which can be output to the brake control circuit 300 and the control device 200 respectively to power ARD rescue and electric brake release rescue. This invention provides a multi-functional intelligent elevator power supply that integrates at least the existing elevator's brake power supply, system power supply, ARD rescue power supply, and electric brake release power supply (existing elevators have separate ARD rescue power supplies and electric brake release power supplies to power ARD rescue and electric brake release rescue respectively) into a single, coordinated management system under a control device 200. This improves the coordination between multiple power supply devices, facilitates maintenance, and enables unified control, thereby enhancing power supply stability and reducing the probability of false alarms. Furthermore, because the rescue power supply shares the same power supply structure as the normal power supply, it improves the utilization rate of the rescue power supply, significantly increases power supply integration, reduces equipment size, and lowers costs.

[0083] Reference Figures 1 to 2 In one embodiment of the present invention, the system power supply circuit 400 includes:

[0084] A bidirectional AC-DC conversion circuit 410 is provided, which has a first terminal and a second terminal. The first terminal of the bidirectional AC-DC conversion circuit 410 is connected to the power frequency transformer 100. The bidirectional AC-DC conversion circuit 410 is used to convert the AC power output from the power frequency transformer 100 into DC power and then output it.

[0085] DC-DC converter circuit 420, the input terminal of which is connected to the second terminal of bidirectional AC-DC converter circuit 410, and the output terminal of which is connected to control device 200; DC-DC converter circuit 420 is used to convert the DC power output from bidirectional AC-DC converter circuit 410 into voltage and output it to control device 200.

[0086] The backup power supply 500 is connected to the common connection terminal of the bidirectional AC-DC conversion circuit 410 and the DC-DC conversion circuit 420; when the power frequency transformer 100 loses power, the backup power supply outputs one AC power supply and one DC power supply respectively through the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit.

[0087] Specifically, the DC power output of the backup power supply 500 is divided into two paths. One path is inverted into AC power by the bidirectional AC-DC conversion circuit 410 and output to the brake control circuit 300 via the power frequency transformer 100. The other path is converted into DC voltage and output to power the control device.

[0088] In this embodiment, the bidirectional AC-DC conversion circuit 410 can be implemented using a bridge structure constructed from multiple switching transistors. The switching transistors can be formed by connecting switching devices and unidirectional conducting elements in parallel. The switching devices are preferably semiconductor switching devices, which can be any one or more combinations of MOSFETs, SiC transistors, and IGBTs. The unidirectional conducting element can be a Schottky diode or a parasitic diode integrated into the semiconductor switching device. During normal operation, the multiple switching transistors in the bidirectional AC-DC conversion circuit 410 receive various control signals output from the control device 200, causing the bidirectional AC-DC conversion circuit 410 to be in a rectification state, rectifying the AC voltage output from the power frequency transformer 100 into DC voltage. It is understood that there are two scenarios in the rectification state: the first scenario is that multiple control signals control all switching devices in the multiple switching transistors to be off, and the AC current only flows through the unidirectional conducting element for output; the second scenario is that multiple control signals control the switching devices in the multiple switching transistors to lag behind the single-phase conducting element for synchronous rectification.

[0089] The DC-DC converter circuit 420 can be implemented using a DC-DC boost circuit or a DC-DC buck circuit. The DC-DC converter circuit 420 is connected to the second terminal of the bidirectional AC-DC converter circuit 410 through the positive DC bus PSB_DC+ and the negative DC bus PSB_DC-, so as to perform corresponding boost / buck conversion on the DC voltage output by the bidirectional AC-DC converter circuit 410 and output it to the control device 200 to power it.

[0090] When the power frequency transformer 100 loses power, the DC power output from the backup power supply 500 is input to the DC-DC conversion circuit 420 via the DC bus (PSB_DC+ and PSB_DC-), and after corresponding voltage conversion, it supplies power to the control device 200. The DC power output from the backup power supply 500 is also input to the second terminal of the bidirectional AC-DC conversion circuit 410 via the DC bus (PSB_DC+ and PSB_DC-). At this time, when the control device detects that the power frequency transformer 100 has lost power, it outputs a corresponding control signal to put the bidirectional AC-DC conversion circuit 410 into an inverter state, so that the bidirectional AC-DC conversion circuit 410 can invert the DC power input at the second terminal into AC power and output it, thereby realizing the corresponding output of one AC power and one DC power. This embodiment takes the output of one AC power and one DC power by the system power supply circuit 400 when the power frequency transformer 100 loses power as an example for explanation.

[0091] In an optional embodiment, the bidirectional AC-DC conversion circuit 410 is implemented using four N-MOS transistors (Q1 to Q4). Each N-MOS transistor (Q1 to Q4) has a built-in parasitic diode. The bidirectional AC-DC conversion circuit 410 is used to change its rectification / inversion state according to the received PWM control signal. With this configuration, the control device 200 can obtain a power supply voltage under all conditions, thus enabling it to coordinate the operation of various power supplies in different operating states of the elevator.

[0092] Reference Figures 1 to 2 In one embodiment of the present invention, the power frequency transformer 100 includes: a first coil, a second coil, a third coil, and a fourth coil; the first coil is used to connect to the AC power supply; the second and third coils are connected to the brake control circuit 300 to convert the AC power supply connected to the first coil into voltages and output them to the brake control circuit; the fourth coil is connected to the system power supply circuit 400 to convert the AC power supply connected to the first coil into voltages and output them to the system power supply circuit 400.

[0093] The power frequency transformer 100 is also used to convert the AC power supply connected to the fourth coil into voltage and output it to the brake control circuit 300 via the third coil and the fourth coil when the power frequency transformer 100 loses power.

[0094] In this embodiment, the second and third coils of the power frequency transformer 100 output two voltage values ​​to the brake control circuit 300 according to their turns ratio with the first coil. The higher voltage value is the forced excitation voltage, and the lower voltage value is the holding voltage. When the elevator brake is released, a larger torque is required, so the higher voltage forced excitation voltage is needed for driving. After the elevator brake is released and the elevator is running normally, the lower voltage holding voltage can be switched to keep the elevator brake in the open state. The fourth coil is used to output a corresponding AC current to the system power supply circuit 400 according to its turns ratio with the first coil. When the power frequency transformer 100 is de-energized, the fourth coil is used to connect to the AC current output after being inverted by the bidirectional AC-DC conversion circuit 410. At this time, the fourth coil can be regarded as the primary coil. The fourth coil generates a corresponding induced electromotive force in the first coil according to its turns ratio, so that the second and third coils also generate induced electromotive forces of the same value as during normal operation according to their turns ratio with the first coil, and output them to the brake control circuit 300.

[0095] In an optional embodiment, the first coil is connected to a 220V AC mains voltage via the live wire L and the neutral wire N. The second and third coils output 110V and 80V AC voltages respectively to the brake control circuit 300. The brake control circuit 300 is constructed using a dual-input relay K1, two sets of contactors (K2, K3), and a rectifier bridge. The dual-input relay K1 is used to connect to 110V and 80V AC voltages respectively. Both the dual-input relay K1 and the two sets of contactors (K2, K3) are turned on / off under the control of the control device 200. Specifically, the control device 200 controls the dual-input relay K1 and contactors (K2, K3) to first connect to a strong excitation voltage of 110V and controls its power supply time to be 2 seconds to fully open the brake. Then, the control device 200 controls the dual-input relay K1 to switch to a maintaining voltage of 80V until the elevator reaches the corresponding floor, at which point the dual-input relay K1 is disconnected to stop the power supply. Understandably, due to safety regulations, the number of contactor groups must be at least two; the power supply time of the forced voltage is determined according to specific settings and is not limited here. This invention's intelligent elevator power supply integrates the normal operating power supply structure with the emergency power supply structure by utilizing the electromagnetic induction between multiple coils in the power frequency transformer 100. This ensures that the emergency power supply structure is not only used when the power grid is abnormal, thereby increasing the utilization rate of its power supply device to 100%.

[0096] Reference Figures 1 to 2 In one embodiment of the present invention, the DC-DC conversion circuit 420 includes: a first DC-DC conversion circuit 421 and a second DC-DC conversion circuit 422;

[0097] The first DC-DC conversion circuit 421 is connected to the second terminal of the bidirectional AC-DC conversion circuit 410. The first DC-DC conversion circuit 421 is used to convert the DC power output from the second terminal of the bidirectional AC-DC conversion circuit 410 into a corresponding voltage and then output it. The first DC-DC conversion circuit 421 is also used to convert the DC power output from the backup power supply 500 into a DC voltage and output it when the power frequency transformer 100 loses power.

[0098] The second DC-DC conversion circuit 422 is connected to the common terminal of the first DC-DC conversion circuit 421 and the bidirectional AC-DC conversion circuit 410; the second DC-DC conversion circuit 422 is used to convert the DC power output from the second terminal of the bidirectional AC-DC conversion circuit 410 into a corresponding voltage and then output it; the second DC-DC conversion circuit 422 is also used to convert the DC power output from the backup power supply 500 into a DC voltage and output it when the power frequency transformer 100 loses power.

[0099] In this embodiment, the first DC-DC conversion circuit 421 and the second DC-DC conversion circuit 422 can be configured with one or more DC-DC conversion circuits. Each DC-DC conversion circuit is used to convert the input voltage into a stable supply voltage before outputting it. Specifically, the first DC-DC conversion circuit 421 is used to convert the DC voltage output from the second terminal of the bidirectional AC-DC conversion circuit 410 or the DC voltage output from the backup power supply 500 before outputting it; the second DC-DC conversion circuit 422 is used to convert the DC voltage output from the second terminal of the bidirectional AC-DC conversion circuit 410 or the DC voltage output from the backup power supply 500 before outputting it. In an optional embodiment, the first DC-DC conversion circuit 421 is used to output only a 24V voltage value; the second DC-DC conversion circuit 422 is used to output stable +5V, ±15V, and +24V voltage values. This configuration ensures the stability of the supply voltage received by subsequent circuits.

[0100] Reference Figures 1 to 2 In one embodiment of the present invention, the control device 200 includes a main control device 210 and an auxiliary control device 220; the power supply terminal of the main control device 210 is connected to the output terminal of the first DC-DC conversion circuit 421, and the power supply terminal of the auxiliary control device 220 is connected to the output terminal of the second DC-DC conversion circuit 422; the auxiliary control device is used to control the operation of the brake control circuit 300 and the bidirectional AC-DC conversion circuit 410 according to the power supply control signal received from the main control device 210.

[0101] In this embodiment, the main control device 210 can be an elevator main control logic device, and the auxiliary control device can be an elevator power control device 220. The main control device 210 and the auxiliary control device 220 respectively use the output voltages of the first DC-DC conversion circuit 421 and the second DC-DC conversion circuit 422 as power supply voltages. The main control device 210 is used to detect the operating status of each device in the elevator in real time, and outputs corresponding power supply control signals to the auxiliary control device 220 according to the detection results, so as to drive each device in the elevator to perform corresponding operations by controlling the power supply voltage of each device in the elevator; the auxiliary control device 220 is used to control the power supply voltage output of the multi-functional elevator intelligent power supply to other devices in the elevator according to the power supply control signal output by the main control device 210. For example, when the main control device 210 determines that the power frequency transformer 100 is not de-energized, it can output a normal power supply control signal to control the auxiliary control device 220, so that the bidirectional AC-DC conversion circuit 410 is in rectification mode, driving the elevator brake and control device 200 to work normally. When the main control device 210 determines that the power frequency transformer 100 is de-energized, it can output a rescue power supply control signal according to the stored rescue program to control the auxiliary control device 220, so that the bidirectional AC-DC conversion circuit 410 is in inverter mode, driving the elevator brake and control device to rescue operation mode. This configuration returns the rescue logic processing to the elevator main control logic device, fundamentally solving the risk of the ARD rescue power supply, electric brake release power supply, and elevator main control logic device competing for control, significantly improving the safety and reliability of elevator rescue operations.

[0102] Reference Figures 1 to 2 In one embodiment of the present invention, the multifunctional elevator intelligent power supply further includes:

[0103] A secondary rescue circuit 600 is connected between the backup power supply 500 and the system power supply circuit 400; the secondary rescue circuit 600 is used to control the backup power supply 500 to input DC power during secondary rescue based on the input key signal.

[0104] In this embodiment, the secondary rescue circuit 600 can be implemented using current-limiting components and switching devices. After ARD rescue or electric brake release rescue is completed, the control device will disconnect the backup power supply 500, putting the elevator in a power-off state to await maintenance. If another rescue is required, the secondary rescue circuit 600 can reconnect the backup power supply 500 to the system power supply circuit 400 according to the received button signal, so that the control device and the brake control circuit 300 can be powered again, allowing the elevator to perform ARD rescue or electric brake release rescue again.

[0105] In an optional embodiment, the secondary rescue circuit 600 is constructed using an N-MOS transistor K5, a manual contactor K7, a soft-start resistor R2, a relay K6, and a fuse F1. When rescuers need to perform a secondary rescue, they manually close the manual contactor K7, allowing the backup power supply to output DC voltage through the soft-start resistor R2. The soft-start resistor R2 is used to suppress the inrush current when power is first applied. Once the control device 200 is operating normally, the control device 200 controls the relay K6 to engage, allowing the backup power supply 500 to be normally connected to the DC bus (PSB_DC+ and PSB_DC-) for rescue power supply. The N-MOS transistor K5 is used to turn on / off according to the switching control signal output by the control device 200, and when on, it shares the current flowing through its parasitic diode to reduce the switching losses of the N-MOS transistor K5 and reduce heat generation. The fuse F1 can protect the battery in the event of a short circuit. By setting up the secondary rescue circuit 600, rescue work that was not completed during the first rescue can be made up in a timely manner, which is beneficial to improving the integrity and flexibility of the rescue work.

[0106] Reference Figures 1 to 2 In one embodiment of the present invention, the multifunctional elevator intelligent power supply further includes:

[0107] An emergency DC power supply circuit 700 is connected to the backup power supply 500; the emergency DC power supply circuit 700 is used to output emergency DC power under the control of the control device 200 when the power frequency transformer 100 loses power.

[0108] The multi-functional elevator intelligent power supply also includes:

[0109] An emergency AC power supply circuit 800 is provided, which is connected to the first coil of the power frequency transformer 100.

[0110] The power frequency transformer 100 is also used to, when the power frequency transformer 100 loses power, convert the AC power input by the fourth coil and output it from the first coil to the emergency AC power supply circuit 800 after voltage transformation; the emergency AC power supply circuit 800 is used to output emergency AC power under the control of the control device.

[0111] The emergency DC power supply circuit 700 can be implemented using a combination circuit constructed from switching devices, unidirectional conducting elements, and current-limiting elements. The switching devices can be implemented using one or more combinations of contactors or relays. When the power frequency transformer 100 loses power, the emergency DC power supply circuit 700, under the control of the control device 200, outputs the DC voltage from the backup power supply 500 to the DC-powered devices in the elevator, enabling them to continue operating during rescue operations. In an optional embodiment, the emergency DC power supply circuit 700 is constructed using three contactors (K8, K9, K10), two diodes (D1, D2), a current-limiting resistor R3, and a fuse F2. In rescue mode, the control device 200 first controls contactors K8 and K9 to close, and the emergency DC power supply circuit 700 outputs emergency DC power to the downstream device through the current-limiting resistor R3 for pre-charging; it also prevents relays in the downstream circuit from sticking together. At this time, the current-limiting resistor R3 is used to suppress the inrush current. When the control device 200 detects that the downstream device has completed pre-charging, it controls contactor K10 to close to provide normal power to the downstream device. Among them, diodes D1 and D2 are used to prevent voltage backflow caused by voltage rise in the downstream device; fuse F2 is used to prevent battery failure caused by short circuit in the downstream equipment.

[0112] The emergency AC power supply circuit 800 can be implemented using one or more combinations of contactors or relays. When the power frequency transformer 100 loses power, the first coil generates a corresponding induced voltage based on its turns ratio with the fourth coil. The value of this induced voltage is equal to the value of the AC power input before the power loss. Under the control of the control device 200, the first coil can output this voltage to the AC-powered devices in the elevator, allowing them to continue operating during rescue. In an optional embodiment, the emergency AC power supply circuit 800 is implemented using a relay K11. The relay K11 is used to conduct when the control device 200 detects the power loss of the power frequency transformer 100, and outputs emergency AC power to the elevator door operator and light curtain device to power them. By setting up the emergency DC power supply circuit 700 and the emergency AC power supply circuit 800, other DC or AC-powered devices in the elevator can continue to operate normally during rescue, which helps to improve the success rate of elevator rescue.

[0113] Reference Figures 1 to 2 In one embodiment of the present invention, the multifunctional elevator intelligent power supply further includes:

[0114] An LC filter circuit 900 is connected between the power frequency transformer 100 and the first terminal of the bidirectional AC-DC conversion circuit 410. The LC filter circuit 900 is used to filter the AC power output from the fourth coil of the power frequency transformer 100 and output it to the bidirectional AC-DC conversion circuit 410. The LC filter circuit 900 is also used to filter the AC power output from the bidirectional AC-DC conversion circuit 410 and output it to the power frequency transformer 100 when the power frequency transformer 100 is de-energized.

[0115] The bus capacitor pre-charging circuit 1000 is connected between the bidirectional AC-DC conversion circuit 410 and the DC-DC conversion circuit 420; the bus capacitor pre-charging circuit 1000 is used to pre-charge the DC bus capacitor under the control of the control device 200 during the initial power-on of the multi-functional elevator intelligent power supply.

[0116] In this embodiment, the LC filter circuit 900 can be implemented by constructing a filter circuit using inductor L1 and capacitor C1. The number of components is determined according to actual needs and is not limited here. The LC filter circuit 900 is used to filter the output AC current of the fourth coil of the power frequency transformer 100 before outputting it during normal operation; and to filter the output AC current of the bidirectional AC-DC conversion circuit 410 before outputting it when the power frequency transformer 100 is de-energized, so as to filter out the frequency of interference bands in the input voltage.

[0117] The bus capacitor pre-charging circuit 1000 can be implemented using a pre-charging circuit constructed from a bus capacitor, resistive elements, and switching devices, wherein the switching devices can be implemented using one or more combinations of contactors or relays. In one embodiment, the bus capacitor pre-charging circuit 1000 is implemented using a current-limiting resistor R1, a relay K4, and a bus capacitor C2; the bus capacitor C2 is connected between the positive DC bus PSB_DC+ and the negative DC bus PSB_DC-; at the initial stage of elevator power-on, the pre-charging current pre-charges the bus capacitor C2 through the current-limiting resistor R1; and after the pre-charging is completed, the control device 200 controls the relay K4 to close, and the pre-charging current can be obtained from the AC power of the mains through a specific voltage transformation.

[0118] The present invention also provides an elevator, which includes a frequency converter and the aforementioned multi-functional intelligent elevator power supply. The frequency converter is connected to the emergency DC power supply circuit 800. In this embodiment, the frequency converter is used to use the reconnected emergency DC power supply as the power source after a power outage, so as to continue operation.

[0119] The detailed structure of the multi-functional elevator intelligent power supply can be referred to the above embodiments, and will not be repeated here. It can be understood that since the above-mentioned multi-functional elevator intelligent power supply is used in the elevator, the elevator embodiments include all the technical solutions of all the above-mentioned multi-functional elevator intelligent power supply embodiments, and the technical effects achieved are exactly the same, and will not be repeated here.

[0120] The present invention also provides a conversion method for a multi-functional elevator intelligent power supply, based on the multi-functional elevator intelligent power supply as described above; or, based on the elevator as described above;

[0121] Since the conversion method of the multi-functional elevator intelligent power supply of the present invention is based on the above-mentioned multi-functional elevator intelligent power supply or elevator, and the detailed structure and specific implementation of the multi-functional elevator intelligent power supply or elevator can be referred to the above embodiments, the embodiments of the conversion method of the multi-functional elevator intelligent power supply of the present invention include all the technical solutions of all the above-mentioned embodiments of the multi-functional elevator intelligent power supply or elevator, and the technical effects achieved are also completely the same, and will not be repeated here.

[0122] Reference Figure 3 In one embodiment of the present invention, the conversion method of the multifunctional elevator intelligent power supply includes the following steps:

[0123] Step S100: When the power frequency transformer is energized, the power frequency transformer outputs two AC power supplies respectively. One AC power supply is output to the brake control circuit, and the other AC power supply is converted into DC power supply by the system power supply circuit and then output to the control device and the backup power supply respectively.

[0124] In this embodiment, when the power frequency transformer is normally energized, i.e., when the elevator is operating normally, energy can flow from the primary side of the power frequency transformer, such as the mains power grid, through the transformer to the load connected to its secondary side. In practical applications, the load connected to the secondary side of the power frequency transformer includes, but is not limited to, the brake control circuit and the system power supply circuit, and may also include other functional units that use AC power supply. The system power supply circuit is used to convert the received AC power into DC power, which is then output to the control device and the backup power supply respectively. The DC power output to the control device is used to power its normal operation, thereby enabling the control device to monitor the overall operation of the elevator; while the DC power output to the backup power supply is used to charge it in real time, so that its charge is always kept at a full level.

[0125] Step S200: When the power frequency transformer loses power, the backup power supply outputs DC power and is converted into at least one AC power and / or at least one DC power through the system power supply circuit. The AC power is output to the brake control circuit through the power frequency transformer, and the DC power is output to the control device.

[0126] In this embodiment, when the power frequency transformer loses power, the backup power supply can automatically connect to the system power supply circuit. At this time, the backup power supply outputs the DC power stored during normal elevator operation. This DC power supply can be converted into at least one AC power supply and / or at least one DC power supply through the system power supply circuit. The DC power supply can be directly output to the control device to ensure the normal power supply of various control units in the control device that are powered by different AC power supplies. The AC power supply can be output in reverse through the power frequency transformer to the brake control circuit, so that various functional modules in the brake control circuit that are powered by different AC power supplies can provide power supply voltage to the elevator brake under the control of the control device, thereby realizing the elevator's ARD rescue mode or brake release rescue mode.

[0127] Reference Figure 4 In one embodiment of the present invention, after step S200, when the power frequency transformer loses power, the backup power supply outputs DC power and converts it into at least one AC power and / or at least one DC power via the system power supply circuit, the AC power is output to the brake control circuit via the power frequency transformer, and the DC power is output to the control device, the method for converting the intelligent power supply of the multi-functional elevator further includes:

[0128] Step S300: The backup power supply is also used to output at least one AC power supply to the brake control circuit via the system power supply circuit when the secondary rescue circuit receives a key signal; and / or, at least one DC power supply to the control device.

[0129] In this embodiment, after the power frequency transformer loses power, the ARD rescue mode or the release rescue mode initiated by the control device can be considered the first rescue. The second rescue is the re-execution of the ARD rescue mode or the release rescue mode after the first rescue. When the second rescue circuit receives a button signal indicating the start of the second rescue, it reconnects the backup power supply to the system power supply circuit so that rescue personnel can promptly make up for the rescue work that was not completed during the first rescue. After the backup power supply is reconnected, its energy flow direction and conversion can be consistent with the above step 200, and will not be described again here.

[0130] Reference Figure 5 In one embodiment of the present invention, the step S100, in which the power frequency transformer outputs two AC power supplies when the power frequency transformer is energized, one AC power supply is output to the brake control circuit, and the other AC power supply is converted to DC power by the system power supply circuit and then output to the control device power supply and the backup power supply respectively, includes:

[0131] Step S110: When the power frequency transformer is energized, the power frequency transformer outputs two AC power supplies respectively;

[0132] Step S120: One AC power supply is output to the brake control circuit; the other AC power supply is output to the bidirectional AC-DC conversion circuit in the system power supply circuit.

[0133] Step S130: After the other AC power supply is converted by the bidirectional AC-DC conversion circuit, two DC power supplies are output. One DC power supply is output to the backup power supply, and the other DC power supply is output to the control device through the DC-DC conversion circuit.

[0134] Furthermore, the other DC power supply is output to the control device via the DC-DC conversion circuit, specifically as follows:

[0135] The other DC power supply is output to the main control device and the auxiliary control device via the first DC-DC conversion circuit and the second DC-DC conversion circuit, respectively.

[0136] In this embodiment, the power frequency transformer converts the AC power from the mains grid and outputs it to the brake control circuit and the bidirectional AC-DC conversion circuit, respectively. This ensures that the brake control circuit, under the control of the control device, can drive the elevator brake to operate normally during elevator operation, thereby achieving the elevator's stopping function. The other AC power is converted to DC power by the bidirectional AC-DC conversion circuit. One path of the DC power is directly output to the backup power supply for charging; the other path undergoes corresponding DC-DC conversion by the first and second DC-DC conversion circuits, and is then output to the first and second DC-DC conversion circuits respectively, providing the required operating voltages for the main control device and the auxiliary control device. This arrangement improves the coordination between the brake power supply and the main system power supply during normal operation.

[0137] Reference Figure 6 In one embodiment of the present invention, when the power frequency transformer loses power, the backup power supply outputs DC power, which is converted into at least one AC power and / or at least one DC power by the system power supply circuit. The AC power is output to the brake control circuit via the power frequency transformer, and the DC power is output to the control device. Step S200 includes:

[0138] Step S210: When the power frequency transformer loses power, the backup power supply outputs DC power.

[0139] Step S220: The DC power supply is converted into at least one AC power supply through the bidirectional AC-DC conversion circuit, and the AC power supply is output to the brake control circuit through the power frequency transformer;

[0140] And / or, the AC power supply is converted into at least one DC power supply via the DC-DC conversion circuit, and the DC power supply is output to the control device.

[0141] In this embodiment, when the mains frequency transformer loses power, the DC power stored in the backup power supply is automatically output to the system power supply circuit. It is understood that since the bidirectional AC-DC conversion circuit only performs bidirectional conversion under the control of the control device, the DC power output from the backup power supply must first provide power to the main control device and auxiliary control device in the control device. Then, the control device controls the bidirectional AC-DC conversion circuit to convert the other DC power into AC power, which is then output to the brake control circuit via the mains frequency transformer. Because the transmission speed of electrical signals is extremely fast, the actual time spent in the above process is negligible. Therefore, the conversion method of the multifunctional elevator intelligent power supply of this invention can seamlessly switch the elevator from mains power supply to backup power supply when the mains power fails.

[0142] Reference Figure 7 In one embodiment of the present invention, after step S210 of the backup power supply outputting DC power, the conversion method of the multi-functional elevator intelligent power supply further includes:

[0143] Step S230: The DC power supply is also output as an emergency DC power supply via the emergency DC power supply circuit;

[0144] The step of converting the DC power supply into at least one AC power supply via the bidirectional AC-DC conversion circuit, and outputting the AC power supply to the brake control circuit via the power frequency transformer, further includes:

[0145] The power frequency transformer also outputs an AC power supply, which is then used as an emergency DC power supply output via the emergency AC power supply circuit.

[0146] In this embodiment, the backup power supply output DC power can be further divided into another DC power supply, which is directly output to the DC-powered functional units in the elevator, such as lighting and communication units, via an emergency DC power supply circuit. This ensures that the corresponding functional units can still operate normally when the power grid fails, facilitating elevator rescue operations. In actual operation, step S230 only needs to occur after step 210, or it can occur simultaneously with step 220. In addition to the AC power output to the brake control circuit, the power frequency transformer can also output an AC power supply to provide emergency power to the AC-powered functional units in the elevator. The rationale for this is the same as the aforementioned emergency DC power supply, and will not be repeated here. It is understood that the quantity and size of the AC power output by the power frequency transformer are determined based on the functional units (AC-powered type) required for elevator rescue, and are not limited here.

[0147] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A multifunctional intelligent power supply for elevators, characterized in that, The multi-functional elevator intelligent power supply includes: A power frequency transformer is used to connect to an AC power source and to perform voltage transformation on the connected AC power source before outputting the voltage. Control device; The brake control circuit is used to receive the AC power output from the power frequency transformer and to control the elevator brake to operate under the control of the control device. The system power supply circuit is used to convert the AC power output from the power frequency transformer into DC power under the control of the control device, and to power the control device; and A backup power supply is used to connect to the system power supply circuit. When the power frequency transformer loses power, it outputs DC power and, after being inverted and converted by the system power supply circuit, outputs at least one AC power supply and / or at least one DC power supply. The output AC power supply is output to the brake control circuit via the power frequency transformer, and the output DC power supply powers the control device.

2. The multifunctional elevator intelligent power supply as described in claim 1, characterized in that, The system power supply circuit includes: A bidirectional AC-DC converter circuit, having a first terminal and a second terminal, wherein the first terminal of the bidirectional AC-DC converter circuit is connected to the power frequency transformer; the bidirectional AC-DC converter circuit is used to convert the AC power output from the power frequency transformer into DC power and output it; and The DC-DC conversion circuit has its input terminal connected to the second terminal of the bidirectional AC-DC conversion circuit, and its output terminal connected to the control device. The DC-DC conversion circuit is used to convert the DC power output from the bidirectional AC-DC conversion circuit into a voltage and then output it to the control device. The backup power supply is connected to the common connection terminal of the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit; when the power frequency transformer loses power, the backup power supply outputs one AC power supply and one DC power supply respectively through the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit. Specifically, the DC power output from the backup power supply is divided into two paths. One path is inverted into AC power by the bidirectional AC-DC conversion circuit and output to the brake control circuit via the power frequency transformer. The other path is converted into DC voltage and output to power the control device.

3. The multifunctional elevator intelligent power supply as described in claim 2, characterized in that, The power frequency transformer includes a first coil, a second coil, a third coil, and a fourth coil; the first coil is used to connect to the AC power supply; the second and third coils are connected to the brake control circuit to convert the AC power supply connected to the first coil into voltages and output them to the brake control circuit; the fourth coil is connected to the system power supply circuit to convert the AC power supply connected to the first coil into voltages and output them to the system power supply circuit. The power frequency transformer is also used to convert the AC power supply connected to the fourth coil into voltage and output it to the brake control circuit via the third coil and the fourth coil when the power frequency transformer loses power.

4. The multifunctional elevator intelligent power supply as described in claim 2, characterized in that, The DC-DC conversion circuit includes: a first DC-DC conversion circuit and a second DC-DC conversion circuit; The first DC-DC conversion circuit is connected to the second terminal of the bidirectional AC-DC conversion circuit. The first DC-DC conversion circuit is used to convert the DC power output from the second terminal of the bidirectional AC-DC conversion circuit into a corresponding voltage and then output it. The first DC-DC conversion circuit is also used to convert the DC power output from the backup power supply into a DC voltage and then output it when the power frequency transformer loses power. The second DC-DC conversion circuit is connected to the common terminal of the first DC-DC conversion circuit and the bidirectional AC-DC conversion circuit; the second DC-DC conversion circuit is used to convert the DC power output from the second terminal of the bidirectional AC-DC conversion circuit into a corresponding voltage and then output it; the second DC-DC conversion circuit is also used to convert the DC power output from the backup power supply into a DC voltage and then output it when the power frequency transformer loses power.

5. The multifunctional elevator intelligent power supply as described in claim 4, characterized in that, The control device includes a main control device and an auxiliary control device; the power supply terminal of the main control device is connected to the output terminal of the first DC-DC conversion circuit, and the power supply terminal of the auxiliary control device is connected to the output terminal of the second DC-DC conversion circuit; the auxiliary control device is used to control the brake control circuit and the bidirectional AC-DC conversion circuit to work according to the power supply control signal output by the main control device.

6. The multifunctional elevator intelligent power supply as described in claim 1, characterized in that, The multi-functional elevator intelligent power supply also includes: A secondary rescue circuit is connected between the backup power supply and the system power supply circuit; the secondary rescue circuit is used to control the DC power input of the backup power supply during a secondary rescue based on the received key signal.

7. The multifunctional elevator intelligent power supply as described in claim 1, characterized in that, The multi-functional elevator intelligent power supply also includes: An emergency DC power supply circuit is provided, which is connected to the backup power supply. The emergency DC power supply circuit is used to output emergency DC power under the control of the control device when the power frequency transformer loses power.

8. The multifunctional elevator intelligent power supply as described in claim 3, characterized in that, The multi-functional elevator intelligent power supply also includes: An emergency AC power supply circuit is connected to the first coil of the power frequency transformer. The power frequency transformer is also used to, when the power frequency transformer loses power, convert the AC power input to the fourth coil and output it from the first coil to the emergency AC power supply circuit after voltage transformation; the emergency AC power supply circuit is used to output emergency AC power under the control of the control device.

9. The multifunctional elevator intelligent power supply as described in any one of claims 1 to 8, characterized in that, The multi-functional elevator intelligent power supply also includes: An LC filter circuit is connected between the power frequency transformer and the first terminal of the bidirectional AC-DC conversion circuit of the multi-functional elevator intelligent power supply. The LC filter circuit is used to filter the AC power output from the fourth coil of the power frequency transformer and output it to the bidirectional AC-DC conversion circuit. The LC filter circuit is also used to filter the AC power output from the bidirectional AC-DC conversion circuit and output it to the power frequency transformer when the power frequency transformer loses power. A bus capacitor pre-charging circuit is connected between the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit of the multi-functional elevator intelligent power supply; the bus capacitor pre-charging circuit is used to pre-charge the DC bus capacitor under the control of the control device during the initial power-on of the multi-functional elevator intelligent power supply.

10. An elevator, characterized in that, The elevator includes a frequency converter and a multi-functional intelligent elevator power supply as described in any one of claims 1 to 9; The frequency converter is connected to the emergency DC power supply circuit of the multi-functional elevator intelligent power supply.

11. A method for converting a multifunctional elevator intelligent power supply, based on the multifunctional elevator intelligent power supply as described in any one of claims 1-9; or, based on the elevator as described in claim 10; Its features are, The conversion method for the intelligent power supply of the multi-functional elevator includes the following steps: When the power frequency transformer is energized, the power frequency transformer outputs two AC power supplies respectively. One AC power supply is output to the brake control circuit, and the other AC power supply is converted into DC power by the system power supply circuit and then output to the control device and the backup power supply respectively. When the power frequency transformer loses power, the backup power supply outputs DC power, which is converted into at least one AC power and / or at least one DC power through the system power supply circuit. The AC power is output to the brake control circuit through the power frequency transformer, and the DC power is output to the control device.

12. The method for converting the intelligent power supply of a multi-functional elevator as described in claim 11, characterized in that, When the power frequency transformer is energized, the power frequency transformer outputs two AC power supplies, one of which is output to the brake control circuit, and the other AC power supply is converted to DC power by the system power supply circuit and then output to the control device and the backup power supply respectively. The steps include: When the power frequency transformer is energized, the power frequency transformer outputs two AC power supplies respectively; One AC power supply is output to the brake control circuit; the other AC power supply is output to the bidirectional AC-DC conversion circuit in the system power supply circuit. The other AC power supply is converted by the bidirectional AC-DC conversion circuit to output two DC power supplies. One DC power supply is output to the backup power supply, and the other DC power supply is output to the control device through the DC-DC conversion circuit of the multi-functional elevator intelligent power supply.

13. The method for converting the intelligent power supply of a multi-functional elevator as described in claim 12, characterized in that, The other DC power supply is output to the control device via the DC-DC conversion circuit of the multi-functional elevator intelligent power supply, specifically as follows: The other DC power supply is output to the main control device and auxiliary control device of the multi-functional elevator intelligent power supply via the first DC-DC conversion circuit and the second DC-DC conversion circuit of the multi-functional elevator intelligent power supply, respectively.

14. The method for converting the intelligent power supply of a multi-functional elevator as described in claim 11, characterized in that, When the power frequency transformer loses power, the backup power supply outputs DC power, which is then converted into at least one AC power and / or at least one DC power by the system power supply circuit. The AC power is output to the brake control circuit via the power frequency transformer, and the DC power is output to the control device. The steps include: When the power frequency transformer loses power, the backup power supply outputs DC power. The DC power supply is converted into at least one AC power supply through the bidirectional AC-DC conversion circuit of the multi-functional elevator intelligent power supply, and the AC power supply is output to the brake control circuit through the power frequency transformer. And / or, the AC power supply is converted into at least one DC power supply via the DC-DC conversion circuit of the multi-functional elevator intelligent power supply, and the DC power supply is output to the control device.

15. The method for converting the intelligent power supply of a multi-functional elevator as described in claim 14, characterized in that, Following the step of outputting DC power from the backup power supply, the conversion method for the intelligent power supply of the multi-functional elevator further includes: The DC power supply is also used as an emergency DC power supply output via the emergency DC power supply circuit of the multi-functional elevator intelligent power supply. The step of converting the DC power supply into at least one AC power supply via the bidirectional AC-DC conversion circuit of the multi-functional elevator intelligent power supply, and outputting the AC power supply to the brake control circuit via the power frequency transformer, further includes: The power frequency transformer also outputs at least one AC power source, which is then used as an emergency AC power source output via the emergency AC power supply circuit.

16. The method for converting the intelligent power supply of a multi-functional elevator as described in claim 11, characterized in that, After the steps of the backup power supply outputting DC power when the power frequency transformer loses power, and converting it into at least one AC power supply and / or at least one DC power supply via the system power supply circuit, the AC power supply being output to the brake control circuit via the power frequency transformer, and the DC power supply being output to the control device, the conversion method of the intelligent power supply for the multi-functional elevator further includes: The backup power supply is also used to output at least one AC power supply to the brake control circuit via the system power supply circuit when the secondary rescue circuit receives a key signal; and / or, at least one DC power supply to the control device.

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