Power supply device and power supply equipment

Abstract

The present application discloses a power supply device and a power supply equipment, relating to the field of power technology, especially the field of power supply technology. Two cooperating power supply devices provided by the present application are respectively used to connect the power source on the power supply side and the load on the power receiving side, so as to form a power supply equipment. Whether the two power supply devices are connected can be detected through two signal lines. The power supply device on the power supply side includes two AC buses, a power conversion module, a control module, a switch module, and two signal detection terminals. The switch module is arranged on the AC bus; after converting the high-voltage AC power into low-voltage DC power through the power conversion module, it is used to provide a low-voltage DC detection signal. When the two signal detection terminals are connected, it indicates that the power supply device on the power receiving side has been successfully connected to the power supply device on the power supply side. Then, the switch module is turned on to output high-voltage AC power, which can improve the power supply safety of the AC power source.

Description

Technical Field

[0001] This application relates to the field of power technology, particularly to power supply technology, and provides a power supply device on the power supply side, a power supply device on the power receiving side, and a power supply equipment. Background Art

[0002] When conducting an online broadcast of a live program, many broadcast devices at the scene need to be powered, such as monitors used by jibs and monitors required for specially set up operation workstations at the scene. The characteristics of these power consumption requirements are that the locations are flexible and changeable, and the power consumption is relatively small, generally not exceeding 200W. Therefore, the power supply for these devices is often obtained by drawing power from other high-power electrical devices. Generally, a high-power distribution box is reserved at the program site for devices with high-power electrical requirements such as lighting, large screen displays, and sound reinforcement at the scene.

[0003] However, when drawing power from high-power devices, since the power consumption of high-power devices is usually 220V mains power, and the wire cores of the connectors between the broadcast devices and the power-taking devices are usually exposed, plugging and unplugging the connectors with high voltage without protection is very likely to cause dangers such as electric shock and scalding to the operators, and may even lead to casualties in severe cases.

[0004] Therefore, how to improve the safety of AC power supply needs to be considered. Summary of the Invention

[0005] Embodiments of this application provide a power supply device on the power supply side and a power supply device on the power receiving side. When an AC power supply equipment is formed by a power supply line between the power supply device on the power supply side and the power supply device on the power receiving side, power supply can be carried out when it is detected that the power supply device on the power supply side and the power supply device on the power receiving side are successfully connected, thereby improving the safety of AC power supply.

[0006] On the one hand, a power supply device on the power supply side is provided. The power supply device on the power supply side includes two AC buses, a power conversion module, a control module, a switch module, and two signal detection terminals. The switch module is arranged on the AC bus;

[0007] The input end of the AC bus is used to connect to an AC power supply, and the output end is used to output alternating current;

[0008] The power conversion module includes an AC power input end and a first DC output end. The AC power input end is connected to the input end of the AC bus, and the first DC output end is connected to one signal detection terminal;

[0009] The power conversion module converts the alternating current input at the input end of the AC bus into direct current with a set voltage and outputs it through the first DC output end;

[0010] One signal input terminal of the control module is connected to another signal detection terminal. When a voltage detection signal is detected at the signal input terminal, the switch module is controlled to close, so that the alternating current transmitted on the AC bus is output through the output terminal of the AC bus. The voltage detection signal is formed after the direct current output from the first DC output terminal passes through an external load and is connected between the two signal detection terminals.

[0011] On the one hand, a power receiving side power supply device is provided. The power receiving side power supply device includes two AC buses, a control module, a switch module, and a load detection module. The switch module is arranged on the AC bus.

[0012] The input terminal of the AC bus is used to connect to an AC power supply, and the output terminal is used to output alternating current.

[0013] One signal input terminal of the control module is connected to the load detection module. When a load detection signal detected according to the signal input terminal is a set level value, the switch module is controlled to disconnect, so that the alternating current transmitted on the AC bus is disconnected from output. The set level value is used to indicate that an abnormality corresponding to the set level value occurs in the power receiving load.

[0014] On the one hand, a power supply device is provided, including the power supply side power supply device described in the above aspect and the power receiving side power supply device described in the above aspect.

[0015] The two signal detection terminals of the power supply side power supply device are connected to the two signal detection terminals of the power receiving side power supply device through a DC signal line pair. The power supply side power supply device includes an AC power supply line pair connected to the input terminal of the AC bus of the power receiving side power supply device.

[0016] Among them, the signal of the power conversion module included in the power supply side power supply device converts the alternating current input at the input terminal of the AC bus into direct current of a set voltage and outputs a high-level signal to a signal detection terminal of the power supply side power supply device through the first DC output terminal. A signal detection terminal of the power receiving side power supply device receives the high-level signal and sets the high-level signal to a low-level signal through a first voltage-dividing load and a second voltage-dividing load. When the control module of the power supply side power supply device detects the low-level signal, it controls the switch module on the AC bus to close to supply power to the power receiving side power supply device through the AC bus.

[0017] In the embodiment of the present application, the power conversion module included in the power supply side power supply device converts the alternating current input at the input end of the AC bus into direct current with a set voltage, and outputs it to a signal detection end through the first DC output end. When the two signal detection ends are connected through an external load, the signal input end of the control module can detect a voltage detection signal. At this time, the control module will control the switch module to close, so that the alternating current transmitted on the AC bus is output through the output end of the AC bus.

[0018] In the embodiment of the present application, the power receiving side power supply device also includes corresponding two signal detection ends, and also includes two voltage dividing loads, and the two signal detection ends are respectively connected to the two voltage dividing loads, and cooperate with the power supply side power supply device to form a signal detection circuit.

[0019] In this way, the power supply side power supply device is used to draw power on the power supply side, and the power receiving side power supply device is used to supply power to the load. In addition to being connected through an AC power supply line between the power supply side power supply device and the power receiving side power supply device, a signal detection circuit is formed between their respective signal detection ends through a signal detection line. The signal detection circuit can be used to detect whether the power supply side power supply device and the power receiving side power supply device are reliably connected. Since the power supply voltage of the signal detection circuit is a low-voltage DC power supply obtained by converting the alternating current into direct current and performing step-down processing by the power supply side power supply device, the low-voltage DC power supply is very safe and will not cause harm. Moreover, according to the signal detection circuit, the power receiving side power supply device will only close the switch module to form high-voltage alternating current after confirming that it has been successfully connected to the power supply side power supply device. After the power receiving side power supply device and the power supply side power supply device are successfully connected, various protection measures are in place, avoiding personnel from accidentally touching the connection point and getting an electric shock, thus improving the safety protection measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the LEMO standard camera interface provided by the embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the scenario provided by the embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of a power supply side power supply device provided by the embodiment of the present application;

[0024] Figure 4 A circuit schematic diagram of the power receiving side detection circuit provided by the embodiment of the present application;

[0025] Figure 5 Another structural schematic diagram of the power supply device on the power supply side provided by the embodiment of the present application;

[0026] Figure 6 Yet another structural schematic diagram of the power supply device on the power supply side provided by the embodiment of the present application;

[0027] Figure 7 A schematic diagram of the IV conversion circuit provided by the embodiment of the present application;

[0028] Figure 8 A structural schematic diagram of the power receiving side power supply device provided by the embodiment of the present application;

[0029] Figure 9 Another structural schematic diagram of the power receiving side power supply device provided by the embodiment of the present application;

[0030] Figure 10 A structural schematic diagram of the power supply equipment provided by the embodiment of the present application. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application. Without conflict, the embodiments in the present application and the features in the embodiments can be arbitrarily combined with each other.

[0032] Currently, relay equipment often obtains power from other high-power electrical equipment. Generally, a high-power distribution box is reserved at the program site for equipment with high-power electrical requirements such as on-site lighting, large screen displays, and sound reinforcement. However, since equipment such as lighting, large screen displays, or sound reinforcement are all used offline, which is a different service from online relay, it is very difficult for the equipment for on-site relay to obtain power from equipment such as lighting, large screen displays, or sound reinforcement, and there may be a situation where the working hours are inconsistent. If other workers leave the site and disconnect the corresponding power supply, it will affect the power consumption of the relay equipment. Therefore, relay equipment often faces the current situation of difficult power acquisition.

[0033] When the relay equipment draws power, the reverse power supply method of the camera interface is usually adopted to supply power to the on-site relay equipment. For example, the LEMO (LEMO) standard interface, which is an international standard for television relay, is a hybrid fiber optic connector that can fully meet each national standard at the same time, and is a standard product in the international and domestic broadcasting industries, with strong versatility.

[0034] As Figure 1 shown, it is a schematic structural diagram of the LEMO standard camera interface. The interface includes two power pin cores for power supply and power transmission. As Figure 1 shown, the power pin cores can adopt the American wire gauge (AWG) 16 standard. Two fiber optic pin cores are mainly used for transmitting optical signals, and two signal pin cores are used for transmitting electrical signals. As Figure 1 shown, the power pin cores can adopt the AWG 24 standard.

[0035] Generally speaking, when using the LEMO interface, LEMO interfaces need to be set correspondingly at both ends, and then they can be connected through the LEMO interface. However, usually, the 220V power supply is directly connected to the power pin cores in the LEMO interface on the power supply side (the end close to the power supply, also known as the proximal end). When the 220V alternating current with high voltage and low current is inserted through the LEMO insert, due to the internal capacitance of the load on the power receiving side (the end close to the load, also known as the distal end) being in a zero-capacity state, the voltage across the capacitor is not allowed to change suddenly. Before the capacitor is fully charged, it instantaneously becomes a short-circuit state, resulting in an instantaneous current mutation at the contact point and causing sparks to appear. The center temperature of the electric spark is extremely high, causing the thermocouple effect on the contact point. After long-term use, it will damage the connector, leading to a series of problems such as oxidation, blackening, passivation, and poor contact of the connector. Moreover, since the wire cores of the interface are generally bare, plugging and unplugging the connector with high voltage without protection is very likely to cause dangers such as electric shock and scalding to the operator, and in severe cases, it can even lead to casualties.

[0036] In addition, in the case of a short circuit of the load on the power receiving side, plugging and unplugging the LEMO on the power supply side is likely to cause problems such as burning of the power receiving side, permanent damage to the LEMO interface, and damage to the power supply equipment on the power supply side.

[0037] In view of this, the embodiment of the present application provides a power supply device on the power supply side. The power conversion module included in the power supply device on the power supply side converts the alternating current input at the input end of the AC bus into direct current with a set voltage and outputs it to a signal detection end through the first DC output end. When the two signal detection ends are connected through an external load, a signal input end of the control module can detect a voltage detection signal through the other signal detection end. At this time, the control module will control the switch module to close, so that the alternating current transmitted on the AC bus is output through the output end of the AC bus.

[0038] In addition, the power receiving side power supply device also includes corresponding two signal detection terminals, two voltage dividing loads, and the two signal detection terminals are respectively connected to the two voltage dividing loads, and cooperate with the power supply side power supply device to form a signal detection circuit.

[0039] In this way, the power supply side power supply device is used to draw power on the power supply side, the power receiving side power supply device is used to supply power to the load. In addition to being connected through the AC power supply line between the power supply side power supply device and the power receiving side power supply device, a signal detection circuit is formed through the signal detection line between their respective signal detection terminals. The signal detection circuit can be used to detect whether the power supply side power supply device and the power receiving side power supply device are reliably connected. Since the power supply voltage of the signal detection circuit is a low-voltage DC power supply obtained by converting the alternating current into direct current and performing step-down processing by the power supply side power supply device, the low-voltage DC power supply is very safe and will not cause harm. Moreover, according to the signal detection circuit, when the power receiving side power supply device and the power supply side power supply device have confirmed successful connection with each other, the switch modules are respectively closed to form high-voltage alternating current. After the power receiving side power supply device and the power supply side power supply device are successfully connected, various protection measures are in place to prevent personnel from accidentally touching the connection point and getting an electric shock, thereby enhancing the safety protection measures.

[0040] On the other hand, in order to alleviate the sparking phenomenon, the AC electronic switch can be implemented by a relay electronic switch. Based on the characteristics of the relay, the contacts can be quickly closed, thereby avoiding the instantaneous current mutation at the contact point during slow contact, which may cause sparks and reduce the possibility of damaging the connector.

[0041] In addition, a load detection module is also provided in the power receiving side power supply device, which can detect the state of the power receiving side load. When the power receiving side load suddenly short-circuits, the voltage / current detection circuit in the power receiving side device sends a signal to the control unit, and the control circuit instantly cuts off the load power supply, thereby achieving a protection effect.

[0042] After introducing the design concept of the embodiments of the present application, the following briefly introduces the application scenarios applicable to the technical solutions of the embodiments of the present application. It should be noted that the following introduced application scenarios are only for illustrating the embodiments of the present application rather than limiting. In the specific implementation process, the technical solutions provided by the embodiments of the present application can be flexibly applied according to actual needs.

[0043] The solution provided by the embodiments of the present application can be applied to most power supply scenarios, especially applicable to the power supply of on-site broadcast equipment using a camera interface, such as Figure 2 As shown, it is a schematic diagram of a scenario provided by the embodiments of the present application. In this scenario, it may include a power supply 201, a power supply side power supply device 202, a power receiving side power supply device 203, and a power receiving load 204.

[0044] Among them, the power supply 201 can be the mains power, or lighting, large screen display, sound reinforcement and other work equipment at the live broadcast site. By making the power interface of the power supply device on the power supply side be pluggable to the mains power or the work equipment, power is obtained for the power supply device on the power supply side.

[0045] The power supply device 202 on the power supply side and the power receiving device 203 on the power receiving side can be pluggably connected through a camera interface. The camera interface can be, for example, the Figure 1 LEMO interface shown. When the power supply device 202 on the power supply side detects a correct connection with the power receiving device 203 on the power receiving side, it controls power supply to the power receiving device 203 on the power receiving side. Furthermore, the power receiving device 203 on the power receiving side can supply power to the power receiving load 204. Among them, the power receiving load 204 can be, for example, on-site broadcast equipment such as a monitor, etc. Of course, other possible power receiving loads can also be used for power supply, and the embodiments of the present application do not limit this.

[0046] In the power receiving device 203 on the power receiving side, a load detection module is provided for detecting the state of the power receiving load 204. When the power receiving load 204 suddenly short-circuits, the power receiving device 203 on the power receiving side will instantly cut off the load power supply through the control circuit, so as to achieve a protection effect.

[0047] Certainly, the method provided by the embodiments of the present application is not limited to the Figure 2 application scenario shown, and can also be used in other possible application scenarios, and the embodiments of the present application do not limit this.

[0048] To further illustrate the technical solution provided by the embodiments of the present application, the following will be described in detail in conjunction with the accompanying drawings and specific implementation manners. Since the power supply device on the power supply side and the power receiving device on the power receiving side provided by the embodiments of the present application can be used in cooperation during specific use, therefore, the power supply device on the power supply side and the power receiving device on the power receiving side will be introduced together in the following introduction.

[0049] Please refer to Figure 3 , which is a schematic structural diagram of a power supply device on the power supply side provided by the embodiments of the present application. As Figure 3 shown, the power supply device on the power supply side includes two AC buses 30, a power conversion module 31, a control module 32, a switch module 33, and two signal detection ends, namely a signal detection end 341 and a signal detection end 342. The switch module 33 is arranged on the AC bus 30.

[0050] Among them, one AC bus 30 includes an input end and an output end. Among them, the input end is used to connect to the AC power supply. As Figure 3As shown, the input end of the AC bus 30 is connected to the input end 301 of the power supply side power supply device, and the input end 301 of the power supply side power supply device is connected to the AC power supply, so that the AC bus 30 is connected to the AC power supply. The output end of the AC bus 30 is used to output alternating current.

[0051] The power conversion module 31 includes an AC power input end 311 and a first DC output end 312. The AC power input end 311 is connected to the input end of the AC bus 30, and the first DC output end 312 is connected to a signal detection end 342. The power conversion module 31 converts the alternating current input at the input end of the AC bus 30 into direct current of a set voltage and outputs it to the signal detection end 342 through the first DC output end 312.

[0052] A signal input end 321 of the control module 32 is connected to another signal detection end 341. When the signal input end 321 detects a voltage detection signal, the control switch module 33 is closed, so that the alternating current transmitted on the AC bus 30 is output through the output end of the AC bus 30. The voltage detection signal is formed after the direct current output from the first DC output end 312 passes through an external load and is connected between the signal detection end 341 and the signal detection end 342.

[0053] In the specific implementation process, the external load can be the power receiving side power supply device provided by the embodiment of the present application. Then, the power receiving side power supply device can be connected to the power receiving load. Of course, the external load can also be the power receiving load. Subsequently, the power receiving side power supply device will be mainly used as an example for introduction.

[0054] In the embodiment of the present application, after the power conversion module 31 takes power from the AC bus through the AC power input end 311, it converts the high-voltage AC power into low-voltage DC power for output, and can provide a first detection signal of low-voltage DC for the connection detection between the power supply side power supply device and the power receiving side power supply device. Among them, after the detection signal is output to the signal detection end 342, if the power receiving side power supply device has been successfully connected to the power supply side power supply device, then the detection signal will pass through the processing of the power receiving side power supply device and return a corresponding second detection signal through the signal detection end 341. Furthermore, the control module can capture the second detection signal and determine whether the power receiving side power supply device has been successfully connected to the power supply side power supply device according to the second detection signal. When the power receiving side power supply device has been successfully connected to the power supply side power supply device, the control switch module can be controlled to close, so that the alternating current transmitted on the AC bus 30 is output through the output end of the AC bus 30.

[0055] It can be seen that after the power conversion module 31 converts the high-voltage alternating current into low-voltage direct current, it is used to provide a low-voltage direct current detection signal. When the signal detection terminal 341 and the signal detection terminal 342 are connected through an external load, it indicates that the power supply device on the power receiving side has been successfully connected to the power supply device on the power supply side. Only then can the high-voltage alternating current be output. When the connection is not successful, the high-voltage alternating current will not be output, which can prevent personnel from accidentally touching the connection point and getting an electric shock. Even if they accidentally touch it, it will only be low-voltage electricity and will not cause serious damage to the human body. Therefore, the safety protection for the operator is improved.

[0056] As Figure 3 shown, in the power supply device on the power supply side provided by the embodiment of the present application, the power conversion module 31 further includes a second direct current output terminal 313. The second direct current output terminal 313 is connected to the power supply terminal 322 of the control module 32. After the power conversion module 31 converts the alternating current input at the input terminal of the alternating current bus 30 into direct current of a set voltage, it is also output to the control module 32 through the second direct current output terminal 313 to supply power to the control module 32.

[0057] In the power supply device on the power supply side provided by the embodiment of the present application, the control module 32 can be implemented by using a microcontroller unit (MCU) component with certain data processing capabilities. For example, it can be a single-chip microcomputer or a programmable logic controller (PLC), etc.

[0058] In the power supply device on the power supply side provided by the embodiment of the present application, the two signal detection terminals and the two output terminals of the two alternating current buses form a connection interface 34. Among them, the two signal detection terminals are connected to the external load through a pair of direct current signal lines. One signal detection terminal is connected to one direct current signal line. And the two output terminals of the two alternating current buses are connected to the external load through a pair of alternating current power supply lines. One output terminal is connected to one alternating current power supply line. For example, when the external load is the power supply device on the power receiving side, the input terminal of the power supply device on the power receiving side is a connection interface 41 that matches this connection interface 34 (see Figure 4 shown), then the power supply device on the power supply side and the power supply device on the power receiving side can be connected correspondingly through this interface.

[0059] For example, the connection interface can be a LEMO interface. In this case, the two signal detection terminals can be two signal pins in the LEMO interface, and the two output terminals of the two AC buses can correspond to two power pins in the LEMO interface. In addition, the LEMO interface also includes two additional optical fiber channels. By leading out the two optical fibers in the LEMO composite optical cable to the power supply side and the power receiving side devices, the application of the LEMO composite optical cable can be optimized, enabling the power supply device to be flexibly expanded for use. For example, two power-consuming devices usually involve other signals such as video signals. By using the optical fiber channels in the LEMO interface in combination with multifunctional optical transmission devices, the flexibility of the power supply device can be increased.

[0060] Correspondingly, in order to form a detection loop, corresponding designs are also made for the power receiving side power supply device.

[0061] Please refer to Figure 4 , which is a circuit schematic diagram of the power receiving side detection loop provided by the embodiment of the present application. As Figure 4 shown, the power receiving side power supply device can include two signal detection terminals, namely Figure 4 the signal detection terminal 411 and the signal detection terminal 412 shown in

[0062] . In addition, the power receiving side power supply device also includes a first voltage-dividing load 401 and a second voltage-dividing load 402. When the power supply side power supply device and the power receiving side power supply device are connected, the signal detection terminal 342 of the power supply side power supply device is connected to the signal detection terminal 411 of the power receiving side power supply device, and the signal detection terminal 341 of the power supply side power supply device is connected to the signal detection terminal 412 of the power receiving side power supply device. The signal detection terminal 411 is connected to one end of the first voltage-dividing load 401, the other end of the first voltage-dividing load 401 is connected to the second voltage-dividing load 402 and the signal detection terminal 412, and the other end of the second voltage-dividing load 402 is connected to the reference signal terminal GND.

[0063] Among them, when the two signal detection terminals of the power receiving side power supply device are connected through an external load, the high-level signal received by one signal detection terminal is set to a low-level signal through the first voltage-dividing load and the second voltage-dividing load and sent to the external load. Here, one implementation of the external load can be the power supply side power supply device. Of course, it can also be other possible devices, and the present application does not limit this.

[0064] Among them, the power supply side power supply device and the power receiving side power supply device can be connected through a composite optical cable. For example, it can be a composite optical cable suitable for the LEMO interface. In this case, the signal detection terminals 341 and 342 of the power supply side power supply device can be the signal pins of the LEMO interface, and thus can be correspondingly connected to the signal detection terminals 411 and 412 of the power receiving side power supply device through DC signal lines.

[0065] As shown Figure 4 in the figure, after the power conversion module 31 converts the alternating current of the AC bus 30 into low-voltage direct current, it outputs a DC detection signal to the signal detection terminal 342 through the first DC output terminal 312. Then, when the power supply device on the power supply side and the power supply device on the power receiving side are connected, the DC detection signal can be output to the signal detection terminal 411 through a DC signal line in the composite optical cable. As a result, one end of the first voltage-dividing load 401 is at a certain voltage value. After being divided by the first voltage-dividing load 401, the voltage value will decrease, that is, the high-level DC detection signal is set to a low-level DC detection signal through the first voltage-dividing load 401. Then, the low-level DC detection signal is returned to the signal detection terminal 341 through the signal detection terminal 412. Thus, the signal input terminal 321 of the control module connected to the signal detection terminal 341 can detect the low-level DC detection signal to determine that the power supply device on the power supply side and the power supply device on the power receiving side have been successfully connected.

[0066] Specifically, both the first voltage-dividing load 401 and the second voltage-dividing load 402 can be resistors, and the resistance values of the first voltage-dividing load 401 and the second voltage-dividing load 402 can be the same or different. Of course, the first voltage-dividing load 401 and the second voltage-dividing load 402 can also be other possible loads, and the embodiments of the present application do not limit this.

[0067] Exemplarily, the output of the signal detection terminal 342 is a +5V DC voltage, and the resistance values of the first voltage-dividing load 401 and the second voltage-dividing load 402 are the same, both being 10 kΩ. That is, the first voltage-dividing load 401 and the second voltage-dividing load 402 form a 1:1 voltage-dividing resistor network. Then, the formula for estimating the voltage value of the signal detection terminal 412 can be:

[0068] V 2 = R2 / (R1 + R2) × V 1

[0069] wherein, V 1 is the output voltage of the signal detection terminal 342, V 2 is the voltage value of the signal detection terminal 412, and R1 and R2 are the resistance values of the first voltage-dividing load 401 and the second voltage-dividing load 402 respectively.

[0070] When the power supply device on the power supply side and the power receiving device on the power receiving side are not successfully connected, there is no voltage at the signal detection terminal 412, and there is no current in the control circuit. If the power supply device on the power supply side and the power receiving device on the power receiving side are successfully connected, the estimated value of the voltage at the signal detection terminal 412 is 2.5V, and there is current in the circuit. Therefore, when the control module of the power supply device on the power supply side collects the voltage at the signal detection terminal 412 and analyzes that the voltage value is not zero and the voltage value is 2.5V, it can be determined that the power supply device on the power supply side and the power receiving device on the power receiving side are successfully connected. At this time, the switch module can be controlled to close to supply power to the power receiving device on the power receiving side.

[0071] As Figure 5 shown, it is another structural schematic diagram of the power supply device on the power supply side. Among them, the power supply device on the power supply side may further include a switch control circuit 36. Among them, when the control module 32 needs to control the switch module to close or open, it can send a control signal to the switch control circuit 36 to control the action of the switch module through the switch control circuit 36.

[0072] In the embodiment of the present application, the switch module can be implemented by an AC electronic switch. In order to alleviate the sparking phenomenon, the AC electronic switch can be implemented by a relay electronic switch. Based on the characteristics of the relay, the contacts can be quickly closed, thereby avoiding the instantaneous current mutation at the contact point during slow contact, resulting in the appearance of sparks and reducing the possibility of damaging the connector.

[0073] As Figure 5 shown, in the power supply device on the power supply side provided by the embodiment of the present application, the power conversion module 31 includes an AC-DC conversion module 314, a step-down module 315, and a voltage conversion module 316. The input end of the AC-DC conversion module 314, that is, the input end of the power conversion module 31, is connected to the input end of the AC bus. The output end of the AC-DC conversion module 314 is connected to the input end of the step-down module 315. The output end of the step-down module 315 is connected to the input end of the voltage conversion module 316.

[0074] Among them, the AC-DC conversion module 314 is used to perform AC-DC conversion on the alternating current transmitted on the AC bus to obtain a first direct current. The step-down module 315 is used to perform step-down processing on the first direct current and output a second direct current. The voltage conversion module 316 is used to perform voltage conversion on the second direct current and output direct currents with multiple different voltage values.

[0075] In the specific implementation process, the AC-DC conversion module 314 can be implemented by an AC / DC converter to perform the AC-DC conversion function. The step-down module 315 can be implemented by a DC / DC converter. The voltage conversion module 316 can perform voltage conversion through the circuit on the circuit board. The output voltage value of the voltage conversion module 316 can be adjusted according to the voltage requirements, such as Figure 5As shown, after the step-down processing by the step-down module 315, a +5V DC voltage can be output. After the voltage conversion module 316 performs voltage division processing, DC voltage values of +3.3V, +12V, and -12V can be output.

[0076] During specific use, the +5V DC voltage or the +3.3V DC voltage value can be used as a detection signal and output to the signal detection terminal 342.

[0077] As Figure 5 shown, in the power supply side power supply device provided by the embodiment of the present application, a connection detection module 35 can also be included. One end of the connection detection module 35 is connected to the signal detection terminal 341, and the other end is connected to the control module 32. Among them, the connection detection module 35 is used to collect the electrical signal data in the control loop as Figure 4 shown, and then send the electrical signal data to the control module 32. Then, the control module 32 can determine whether the power supply side power supply device and the power receiving side power supply device are successfully connected according to the electrical signal data. Among them, the electrical signal data can be the voltage value of the signal detection terminal 341, or Figure 4 the current value in the control loop as

[0078] During specific implementation, in order to improve the accuracy of detection and then improve the accuracy of subsequent power supply, multiple data collections can be performed, and after the control module 32 determines that the power supply side power supply device and the power receiving side power supply device are successfully connected multiple times, the switch module is controlled to close to supply power to the power receiving side power supply device. And, during the working process after the power supply side power supply device and the power receiving side power supply device are successfully connected, the electrical signal data in the control loop will also be continuously detected. When it is determined that the power supply side power supply device and the power receiving side power supply device are disconnected, the switch module will be controlled to disconnect to stop supplying power to the power receiving side power supply device.

[0079] In the embodiment of the present application, since the electrical signal data collected in the control loop may be weak, the electrical signal data can be amplified and then transmitted to the control module 32 for processing. Therefore, an amplifier can also be included in the power supply side power supply device. Among them, an error amplifier can be used as the amplifier.

[0080] As Figure 6 shown, it is another structural schematic diagram of the power supply side power supply device. In order to facilitate real-time monitoring of the power supply data to the power receiving side power supply device, in the power supply side power supply device provided by the embodiment of the present application, a data acquisition module 37 and a data display module 38 can also be included. Among them, the data acquisition module 37 is used to collect the electrical signal data on the AC bus 30 and send the electrical signal data to the control module 32, and the control module 32 controls the data display module 38 to display the electrical signal data.

[0081] Among them, the electrical signal data may include voltage and current data. Of course, it may also include other possible parameter data, and the applicant does not limit this.

[0082] Since the operating voltage of the control module 32 is usually low, for example, generally 3.3V or 5V, it cannot directly read the 220V high-voltage electricity on the AC bus 30. Therefore, the data acquisition module 37 may include a transformer and a current-voltage (IV) conversion circuit. The input end of the transformer is electromagnetically coupled to the AC bus 30, the output end of the transformer is connected to the input end of the current-voltage conversion circuit, and the output end of the current-voltage conversion circuit is connected to the control module.

[0083] Among them, the data acquisition module 37 can be divided into a voltage acquisition module and a current acquisition module according to the acquired parameters. Using the electromagnetic coupling method, the AC bus is passed through a magnetic ring as the primary coil, and a multi-turn coil is used as the secondary coil. For example, the AC bus can be coupled in a ratio of 100:1 or 1000:1. When there is current flowing through the AC bus, the secondary end of the coil outputs the corresponding current. Among them, the transformer corresponding to the voltage acquisition module is a voltage transformer. For example, through the voltage transformer, the voltage value of 0-220V can be converted into a current output of 0-22mA. The transformer corresponding to the current acquisition module is a current transformer. For example, through the current transformer, the current value on the AC bus can be converted into a current value output in a corresponding ratio, and the output value is related to the turn ratio.

[0084] When the control module 32 is a single-chip microcomputer, since the single-chip microcomputer cannot directly collect current, the data acquisition module 37 in the embodiment of the present application may further include an IV conversion circuit to convert the current output by the transformer into a voltage for acquisition. The function of the IV conversion circuit is to convert a weak current signal into a voltage signal for acquisition.

[0085] As Figure 7 shown, it is a schematic diagram of an IV conversion circuit. Among them, the input end of the IV conversion circuit is connected to the output end of the transformer, and the output end is connected to the IO acquisition port of the control module 32. Among them, the IV conversion circuit may include a resistor R3, a capacitor C1, and a transimpedance amplifier. The resistor R3 and the capacitor C1 are connected in parallel across the transimpedance amplifier.

[0086] Among them, the voltage acquisition module can use the AC voltage for the control module 32 to collect. Taking the voltage division ratio as the equal ratio multiplier, the corresponding 0-250V AC voltage value can be detected by using a small voltage signal of 0-3V.

[0087] In the embodiments of the present application, in order to display the parameters on the AC bus 30, the power supply side power supply device may further include a data display module 38. When the control module 32 collects the electrical signal data of the AC bus 30, it can process the electrical signal data and provide the processed values to the data display module 38 to control the data display module 38 to display.

[0088] Taking the data display module 38 as a digital tube as an example, the control module 32 can sample through an internal analog-to-digital (AD converter), obtain the received voltage value and current value, and perform operations according to the turn ratio and voltage division ratio to obtain the actual voltage and current values on the AC bus, that is, the AC voltage value and current value in decimal with one-byte size can be obtained. At the same time, the voltage and current values are output to the digital tube for display so that users can read them at any time.

[0089] Of course, in specific implementation, the data display module 38 can also adopt other possible display devices, such as a liquid crystal display panel or an organic light-emitting diode (OLED) display panel, etc. The embodiments of the present application do not limit this.

[0090] In the power supply side power supply device provided by the embodiments of the present application, an isolation transformer 39 may further be included. The isolation transformer 39 is arranged on the AC bus 30 and is used for electromagnetic isolation of the alternating current on the AC bus 30. The isolated alternating current output by the secondary coil of the isolation transformer 39 is output to the power receiving side power supply device.

[0091] Specifically, the isolation transformer 39 can adopt an isolation transformer with high magnetic flux. Of course, other possible isolation transformers can also be adopted. The embodiments of the present application do not limit this.

[0092] In order to further improve the safety of power supply to the load, the embodiments of the present application conduct designs related to load detection in the power receiving side power supply device. As Figure 8 shown, it is a schematic structural diagram of the power receiving side power supply device. Among them, the power receiving side power supply device may include two AC buses 42, a control module 43, a switch module 45, and a load detection module 44. The switch module 45 is arranged on the AC bus 42;

[0093] The input end of the AC bus 42 is used to connect to the power supply side power supply device, and the output end is used to connect to the power receiving load to output alternating current to the power receiving load;

[0094] A signal input terminal 431 of the control module 43 is connected to the load detection module 44. When a load detection signal is detected according to the signal input terminal 431, the control switch module 43 is disconnected, so that the alternating current transmitted on the AC bus 42 stops output. The voltage detection signal is sent out when the load detection module 43 detects an abnormality of the powered load.

[0095] In the embodiment of the present application, after the powered-side power supply device is powered, it is still necessary to detect the state of the powered load through the load detection module 43 to determine whether to release the load power supply. For example, when the powered load is short-circuited, the load detection module 44 in the powered-side power supply device can send the load detection signal to the control module 43, and the control module 43 controls the switch module 45 to cut off the load power supply, so as to achieve a protection effect.

[0096] In the embodiment of the present application, the control module 43 can be powered by a battery or by converting alternating current for power supply. Therefore, the powered-side power supply device can also include a power conversion module 47. The power conversion module 47 includes an AC input terminal 471 and a DC output terminal. The AC input terminal 471 is connected to the input terminal of the AC bus 42, and the DC output terminal is connected to the power supply terminal 432 of the control module 43. The power conversion module 47 converts the alternating current input at the input terminal of the AC bus 42 into direct current with a set voltage and outputs it to the power supply terminal 432 of the control module 43 through the DC output terminal.

[0097] In order to facilitate load detection, the load detection module 43 can be arranged at the output terminal of the AC bus.

[0098] Similar to the power-side power supply device, the power conversion module 47 includes an AC-DC conversion module 472, a buck module 473, and a voltage conversion module 474. The input terminal of the AC-DC conversion module 472, which is the input terminal of the power conversion module 43, is connected to the input terminal of the AC bus 42. The output terminal of the AC-DC conversion module 472 is connected to the input terminal of the buck module 473, and the output terminal of the buck module 473 is connected to the input terminal of the voltage conversion module 474.

[0099] Among them, the AC-DC conversion module 472 is used to perform AC-DC conversion on the alternating current transmitted on the AC bus 42 to obtain the first direct current. The buck module 473 is used to perform buck processing on the first direct current and output the second direct current. The voltage conversion module 474 is used to perform voltage conversion on the second direct current and output direct currents with multiple different voltage values.

[0100] Since the power conversion module 47 is the same as the power conversion module 31 in the power-side power supply device, the description of the power-side power supply device can be referred to and will not be elaborated here.

[0101] In the embodiment of the present application, the power receiving side power supply device may further include an isolation transformer 48, which is arranged on the AC bus 42 and is used for electromagnetic isolation of the alternating current on the AC bus 42. The isolated alternating current output by the secondary coil of the isolation transformer 42 is output to the power receiving load. Specifically, the isolation transformer 8 may adopt an isolation transformer with high magnetic flux. Of course, other possible isolation transformers may also be adopted, and the embodiment of the present application does not limit this.

[0102] In the embodiment of the present application, as shown in Figure 9 similar to the power supply device on the power supply side, the power receiving side power supply device may also include a data acquisition module 49 and a data display module 410. Since the principle is similar to that of the power supply device on the power supply side, reference can be made to the above introduction of the data acquisition module 37 and the data display module 38 of the power supply device on the power supply side, and details will not be elaborated here.

[0103] In summary, when the power supply device on the power supply side and the power receiving side power supply device provided in the embodiment of the present application are connected, this solution uses the data line for transmitting electrical signals in the LEMO interface, connects 2 voltage-dividing loads in the power receiving side power supply device for proportional voltage division respectively, and after data acquisition by the control module, determines whether the data reaches a preset value. If the preset value is reached, it indicates that the power receiving side power supply device is correctly connected, and then the switch module can be closed, and data acquisition is performed by the voltage and current acquisition module. If the preset value is not reached, it indicates that the device on the power receiving side is not correctly connected, and the AC electronic switch must be disconnected and the detection is always cycled.

[0104] In a possible implementation manner, an STM32 single-chip microcomputer can be used as the core circuit for data acquisition and control for data acquisition and control. The connection detection of the LEMO power supply side and the power receiving side, the AC bus voltage acquisition, the AC bus current acquisition, the switch module control, and the short-circuit reset circuit can all be responsible for data acquisition and processing by the control module. In the power supply device on the power supply side, the priorities of the control module execution from high to low are: the connection detection of the LEMO power supply side and the power receiving side, the switch module control, and the real-time acquisition of AC voltage / current. In the power receiving side power supply device, the priorities of the control module execution from high to low are: the switch module control and the AC load status detection. The priority is related to the execution order, and the function with a higher priority is executed first.

[0105] Based on the same inventive concept, as shown in Figure 10 the embodiment of the present application further provides a power supply device, including the above-mentioned power supply device on the power supply side and the power receiving side power supply device.

[0106] The two signal detection terminals of the power supply side power supply device are connected to the two signal detection terminals of the power receiving side power supply device through a DC signal line pair, and the output terminal of the AC bus of the power supply side power supply device is connected to the input terminal of the AC bus of the power receiving side power supply device through an AC power supply line pair;

[0107] Among them, the power supply side power supply device includes a power conversion module. The power conversion module converts the alternating current input at the input terminal of the AC bus of the power supply side power supply device into direct current of a set voltage, and outputs a high-level signal to a signal detection terminal of the power supply side power supply device through the first DC output terminal. A signal detection terminal of the power receiving side power supply device receives the high-level signal, and sets the high-level signal to a low-level signal through the first voltage-dividing load and the second voltage-dividing load, and returns it to another signal detection terminal of the power supply side power supply device through another signal detection terminal of the power receiving side power supply device. When the control module of the power supply side power supply device detects the low-level signal, it controls the switch module on the AC bus to close to supply power to the power receiving side power supply device through the AC bus.

[0108] In a possible implementation manner, the two signal detection terminals of the power supply side power supply device and the output terminal of the AC bus form a connection interface, and the two signal detection terminals of the power receiving side power supply device and the input terminal of the AC bus form a connection interface. The connection interface can be a LEMO interface.

[0109] Since the power supply side power supply device and the power receiving side power supply device have been introduced in detail during the above introduction, they will not be elaborated here.

[0110] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0111] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A power supply side power supply device, characterized in that, the power supply side power supply device includes two AC buses, a power conversion module, a control module and a switch module, and two signal detection terminals, and the switch module is arranged on the AC bus; the input end of the AC bus is used to connect an AC power supply, and the output end is used to output alternating current; the power conversion module includes an AC power input end and a first DC output end, the AC power input end is connected to the input end of the AC bus, and the first DC output end is connected to a signal detection terminal; the power conversion module converts the alternating current input at the input end of the AC bus into direct current of a set voltage and outputs it through the first DC output end; one signal input end of the control module is connected to the other signal detection terminal, and when a voltage detection signal is detected at the signal input end, the switch module is controlled to close so that the alternating current transmitted on the AC bus is output through the output end of the AC bus, and the voltage detection signal is formed after the direct current output from the first DC output end is connected through an external load between the two signal detection terminals.

2. The device according to claim 1, characterized in that, the power conversion module further includes a second DC output end, and the second DC output end is connected to the power supply end of the control module; after the power conversion module converts the alternating current input at the input end of the AC bus into direct current of a set voltage, it also outputs it to the control module through the second DC output end to supply power to the control module.

3. The device according to claim 1, characterized in that, the two signal detection terminals and the two output ends of the two AC buses form a connection interface; wherein, the two signal detection terminals are connected to the external load through a pair of DC signal lines, and one signal detection terminal is connected to one DC signal line; and, the two output ends of the two AC buses are connected to the external load through a pair of AC power supply lines, and one output end is connected to one AC power supply line.

4. The device according to claim 1, characterized in that, the power conversion module includes an AC-DC conversion module, a buck module and a voltage conversion module, the input end of the AC-DC conversion module is connected to the input end of the AC bus, and the output end of the AC-DC conversion module is connected to the input end of the voltage conversion module through the buck module; wherein, the AC-DC conversion module is used to convert the alternating current transmitted on the AC bus into a first direct current, the buck module is used to step down the first direct current and output a second direct current, and the voltage conversion module is used to convert the second direct current and output direct currents of multiple different voltage values.

5. The device according to claim 1, characterized in that, the power supply side power supply device further includes a data acquisition module and a data display module; the data acquisition module is used to acquire the electrical signal data on the AC bus and send the electrical signal data to the control module, and the control module controls the data display module to display the electrical signal data.

6. The device according to claim 5, characterized in that, The data acquisition module includes a mutual inductor and a current-voltage conversion circuit; The input end of the mutual inductor is electromagnetically coupled to the AC bus, the output end of the mutual inductor is connected to the input end of the current-voltage conversion circuit, and the output end of the current-voltage conversion circuit is connected to the control module.

7. A power receiving side power supply device, characterized in that the power receiving side power supply device includes two AC buses, a control module, a switch module, and a load detection module. The switch module is arranged on the AC bus, the load detection module is arranged at the output end of the AC bus, and the switch module is used to connect the input end and the output end of the AC bus; The input end of the AC bus is used to connect to an AC power supply, and the output end is used to output alternating current; The load detection module is used to detect the state of the power receiving load; One signal input end of the control module is connected to the load detection module, and when it is detected according to the signal input end that the load detection signal is a set level value, the switch module is controlled to disconnect, so that the alternating current transmitted on the AC bus is disconnected from the output. The set level value is used to indicate that the power receiving load has an abnormality corresponding to the set level value.

8. The device according to claim 7, characterized in that the power receiving side power supply device further includes a first voltage-dividing load and a second voltage-dividing load, and two signal detection ends; One signal detection end is connected to one end of the first voltage-dividing load, the other end of the first voltage-dividing load is connected to the other signal detection end and one end of the second voltage-dividing load, and the other end of the second voltage-dividing load is connected to the reference signal end; When the two signal detection ends are connected through an external load, the high-level signal received by one signal detection end is set to a low-level signal through the first voltage-dividing load and the second voltage-dividing load, so that when the external load detects the low-level signal, it supplies power to the power receiving side power supply device.

9. A power supply device, characterized in that it includes the power supply side power supply device according to any one of claims 1 to 6 and the power receiving side power supply device according to any one of claims 7 to 8; The two signal detection ends of the power supply side power supply device are connected to the power receiving side power supply device through a DC signal line pair, and the output end of the AC bus of the power supply side power supply device is connected to the input end of the AC bus of the power receiving side power supply device through an AC power supply line pair; Wherein, the power supply side power supply device includes a power conversion module. The power conversion module converts the alternating current input at the input end of the AC bus of the power supply side power supply device into direct current of a set voltage and outputs a high-level signal to a signal detection end of the power supply side power supply device through the first DC output end. The power receiving side power supply device receives the high-level signal, and sets the high-level signal to a low-level signal and returns it to the other signal detection end of the power supply side power supply device. When the control module of the power supply side power supply device detects the low-level signal, it controls the switch module on the AC bus to close, so as to supply power to the power receiving side power supply device through the AC bus.

10. The power supply device according to claim 9, characterized in that two signal detection terminals of the power supply side power supply device and an output terminal of the AC bus form a connection interface; wherein, the connection interface is a Lemo LEMO interface.

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