Power supply device and cabinet

Abstract

A power supply device and a cabinet are used for meeting standby power requirements of different loads. The power supply device comprises an input switch unit, multiple groups of output switch units, execution units in one-to-one correspondence with the output switch units, and a control unit. The input switch unit is connected with an alternating current power supply and a UPS system, and outputs electric energy output by the alternating current power supply or the UPS system to the plurality of output switch units; each group of output switch unit is connected with the input switch unit and the corresponding execution unit, receives electric energy output by the alternating current power supply or the UPS, and supplies the received electric energy to a load connected with the corresponding execution unit through the corresponding execution unit; each execution unit is connected with the control unit and is connected with at least one load; the control unit controls each execution unit to disconnect the connection between the connected load and the corresponding group of output switch units in different preset durations when determining that the AC power supply has a fault, and the preset durations corresponding to the execution units are different.

Description

Technical Field

[0001] The present application relates to the field of power electronics, and in particular to a power supply device and a cabinet. Background Art

[0002] An uninterruptible power system (UPS) is a device that can replace the power grid to continuously supply power to the load and maintain normal operation of the load in the event of a power grid failure. Specifically, the UPS is connected to the power grid and the load respectively, and can monitor the working status of the power grid. When the power grid fails, it can control the discharge of the internal battery pack and use the power output of the battery pack to continuously supply power to the load.

[0003] In actual use, the battery pack has limited ability to store electrical energy, and different loads require different backup power durations after a grid failure. If the UPS is disconnected from all loads at the same time, important loads may lose data due to insufficient backup power duration. Utility Model Content

[0004] The present application provides a power supply device and a cabinet for meeting the backup power time requirements of different loads.

[0005] In a first aspect, an embodiment of the present application provides a power supply device, which includes an input switch unit for connecting to an AC power supply and a UPS system, and outputting the electric energy output by the AC power supply or the UPS system to multiple output switch units; each group of output switch units is connected to the input switch unit and the corresponding execution unit, and is used to receive the electric energy output by the AC power supply or the UPS, and use the received electric energy to power the load connected to the corresponding execution unit through the corresponding execution unit; each execution unit is connected to a control unit, and is used to be connected to at least one load, wherein the load connected to each execution unit is different; the control unit is used to control each execution unit to disconnect the connected load from the corresponding group of output switch units at different preset time lengths when an AC power failure is determined, wherein the preset time length corresponding to each execution unit is different. By adopting the above design, each group of output switch units is connected to multiple loads with the same backup power duration requirements through the corresponding execution units. When the AC power fails, the UPS system can only provide power through the built-in battery pack or the external battery pack. Since the battery pack has limited ability to store power, when the control unit detects an AC power failure, it can control each execution unit to disconnect at a corresponding duration according to the backup power duration requirements of the loads connected to the back end of each execution unit, thereby achieving time-sharing power-off of loads with different backup power duration requirements, thereby meeting the backup power requirements of multiple loads.

[0006] In a possible design, each group of output switch units includes at least one first switch, and each execution unit includes a release corresponding one-to-one to each first switch in the corresponding group of output switch units.

[0007] In a possible design, the release is a shunt release or an undervoltage release.

[0008] In a possible design, the control unit includes: a second switch, a first relay, and a first time relay corresponding to each execution unit one by one.

[0009] Among them, the first end of the second switch is used to connect to the AC power supply and the UPS system, the second end of the second switch is connected to the coil of the first relay, and the second switch is turned on when receiving the first control signal, and the first control signal is sent by the UPS system when the AC power supply fails; each normally open contact of the first relay is connected between the second end of the second switch and the coil of a first time relay, and each normally open contact of the second relay is connected to a different first time relay; if the release in each execution unit is a shunt release, each delayed closing contact of each first time relay is connected between the second end of the second switch and the coil of at least one release in the corresponding execution unit; if the release in each execution unit is an undervoltage release, each delayed opening contact of each first time relay is connected between the first end of the first switch and the coil of at least one release in the corresponding execution unit, and each delayed closing contact or delayed opening contact of each first time relay is connected to a different release.

[0010] In a possible design, the total current of the releasers connected to the contacts in a single first time relay is less than or equal to the maximum current allowed to pass through the corresponding first time relay.

[0011] In a possible design, the control unit includes: a third switch, a second relay, a second time relay corresponding to each execution unit on a one-to-one basis, and a first contactor corresponding to each execution unit on a one-to-one basis.

[0012] The first end of the third switch is used to connect to the AC power supply and the UPS system, the second end of the third switch is connected to the coil of the second relay, and the third switch is turned on when receiving the first control signal, and the first control signal is sent by the UPS system when the AC power supply fails; each normally open contact of the second relay is connected between the second end of the third switch and the coil of a second time relay, and each normally open contact of the second relay is connected to a different second time relay; the delayed closing contact of each second time relay is connected between the second end of the third switch and the coil of the second contactor corresponding to the corresponding execution unit; wherein the delay duration of each second time relay is different; if the releaser in each execution unit is a shunt releaser, each normally open contact in each first contactor is connected between the second end of the third switch and the coil of at least one releaser in the corresponding execution unit, and if the releaser in each execution unit is an undervoltage releaser, each normally closed contact in each first contactor is connected between the first end of the third switch and the coil of at least one release in the corresponding execution unit, and each normally open contact or normally closed contact of each first contactor is connected to a different releaser.

[0013] In a possible design, the total current of the release connected to each normally open contact in a single first contactor is less than or equal to the maximum current allowed to pass through a single contact in the corresponding first contactor.

[0014] In a possible design, the control unit includes: a fourth switch and a programmable logic controller.

[0015] Among them, the first end of the fourth switch is used to connect to the AC power supply and the UPS system, the second end of the fourth switch is connected to the programmable logic controller, and the fourth switch is turned on when receiving the first control signal, and the first control signal is sent by the UPS system when the AC power supply fails; the programmable logic controller is connected to each execution unit, and is used to control the release coil in each execution unit to be energized for different preset time lengths when determining that the AC power supply fails, if the release in each execution unit is a shunt release, and if the release in each execution unit is an undervoltage release, control the release coil in each execution unit to be de-energized for different preset time lengths.

[0016] In a second aspect, an embodiment of the present application provides a cabinet, which includes a frame and a power supply device provided in the first aspect of the present application and any possible design thereof, and the frame has a placement space inside for placing the power supply device.

[0017] In addition, the technical effects of the second aspect can refer to the technical effects brought about by the different designs in the first aspect of the embodiment of the present application, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of a power supply device provided in an embodiment of the present application Figure 1 ;

[0020] Figure 2 A schematic diagram of a power supply device provided in an embodiment of the present application Figure 2 ;

[0021] Figure 3 A schematic diagram of a power supply device provided in an embodiment of the present application Figure 3 ;

[0022] Figure 4 A schematic diagram of the structure of a control unit provided in Example 1 of the present application;

[0023] Figure 5 A schematic diagram of the structure of another control unit provided in Embodiment 1 of the present application;

[0024] Figure 6 A schematic diagram of the structure of a control unit provided in Embodiment 2 of the present application;

[0025] Figure 7 A schematic diagram of the structure of another control unit provided in Embodiment 2 of the present application;

[0026] Figure 8 A schematic diagram of the structure of a control unit provided in Example 3 of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] The embodiments described in the implementation section of this application are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] The following is an introduction to the application scenarios of the technical solutions in the embodiments of the present application.

[0030] The solution provided by the embodiment of the present application can be applied to power supply scenarios with backup power supplies, and after the backup power supply is started, the power supply duration of different devices can be controlled to meet the backup power duration requirements of different loads. Taking the application of the solution provided by the embodiment of the present application to a data center as an example, when a power grid fails, the UPS system serves as a backup power supply to power multiple devices in the data center. Multiple devices in the data center require different backup power durations for data storage. If all devices are powered off at the same time, the backup power duration of some devices may be insufficient, resulting in data loss of some devices.

[0031] In view of this, the present application provides a power supply device for meeting the requirements of different loads for backup power duration.

[0032] The power supply device provided in the embodiment of the present application is connected to the AC power supply and the UPS system respectively, and is also connected to the load, and can provide the electric energy output by the AC power supply or the UPS system to the load connected at the back end.

[0033] In practical applications, the power supply device can be fixedly connected to the AC power supply, UPS system and load. The power supply device can also be set in a flexible and detachable form, that is, the power supply device is provided with an external interface, and the AC power supply, UPS system and load can be connected to the power supply device through the external interface on the power supply device. In this case, the power supply device can be regarded as an independent device.

[0034] See also Figure 1 As shown, it is a structural schematic diagram of a power supply device provided in an embodiment of the present application, such as Figure 1 As shown, the power supply device includes an input switch unit 11, a plurality of groups of output switch units 12, an execution unit 13 corresponding to each group of output switch units 12, and a control unit 14.

[0035] The input switch unit 11 is used to connect to the AC power supply and the UPS system. Each group of output switch units 12 is connected to the input switch unit 11 and the corresponding execution unit 13. Each execution unit 13 is connected to the control unit 14 and is used to connect to at least one load. The load connected to each execution unit is different.

[0036] It should be understood that Figure 1 The structure of the power supply device shown is only an example. In actual applications, the power supply device may have more Figure 1 For example, in addition to the above components, the power supply device may also include protection components and voltage stabilization components. Figure 1 The various components shown in the EMBODIMENTS 2000 may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0037] In actual use, the power supply device can use the AC power supply or UPS system as the power supply, and the input switch unit 11 can control the connection between the power supply and the rear-end device of the input switch unit 11. When the input switch unit 11 generally uses a circuit breaker QF with a protection function, when the circuit breaker QF is closed, the input switch unit 11 can output the electric energy output by the AC power supply or the UPS system to multiple groups of output switch units 12. Each group of output switch units 12 is connected to part of the load through the corresponding execution unit, and the power supply control of the load at the rear end of each switch device is realized by controlling the conduction and shutdown of each switch device in the multiple groups of output switch units 12. When some or all of the switch devices in each group of output switch units 12 are turned on, the turned-on switch devices constitute the power transmission path between the power supply and the load at the rear end of the turned-on switch devices, and the power supply can supply power to the load through the power transmission path. The control unit 14 is used to control each execution unit 13 to disconnect the connection between the connected load and the corresponding group of output switch units 12 for different preset time lengths after receiving the first control signal when determining that the AC power supply fails, so as to complete the time-sharing power-off of loads with different backup power durations.

[0038] Need to explain, Figure 1 In the power supply device shown, the UPS system serves as a backup power source for the power supply device. In actual use, other devices may also be used as a backup power source for the power supply device.

[0039] In the power supply device provided in the embodiment of the present application, each group of output switch units 12 is connected to multiple loads with the same backup power duration through the corresponding execution unit 13. Figure 2 As shown, each group of output switch units 12 includes at least one first switch, and each execution unit 13 includes a tripper corresponding to each first switch in the corresponding group of output switch units 13. Each first switch can be connected to one or more loads through the corresponding tripper. When the AC power supply is normally supplied, since the AC power supply can provide power for a long time, the tripper does not work, and the power supply control of the load connected to the rear end of the first switch is completed by controlling the conduction and shutdown of the first switch. When the controller determines that the UPS system starts to supply power due to the AC power failure, since the capacity of the battery pack inside the UPS system or the battery pack external to the UPS system to store power is limited, in order to meet the requirements of different loads for backup power duration, the control unit 14 controls each group of output switch units 12 to disconnect from the rear end load through the execution unit 13 according to the backup power duration requirements of the loads connected to each group of output switch units 12, so as to realize the time-sharing power-off of loads with different backup power duration requirements, and meet the requirements of different loads for backup power duration.

[0040] In actual use, the number of groups of output switch units in the power supply device and the number of first switches in each group of output switch units can be set according to the number of loads connected to the power supply device and the requirements of the above loads for the backup power time.

[0041] In order to facilitate the introduction of the power supply device provided in the embodiment of the present application, see Figure 3 As shown, it is taken as an example that the power supply device includes three groups of output switch units, each group of output switch units includes four first switches K1, the first group of output switch units is connected to the execution unit composed of releases QF1 to QF4, the second group of output switch units is connected to the execution unit composed of releases QF5 to QF8, and the third group of output switch units is connected to the execution unit composed of releases QF9 to QF12.

[0042] In a possible implementation, a detector and a controller are provided inside the UPS system, and the detector can detect the operating value of the AC power supply. The controller is connected to the detector, and can determine the fault state of the AC power supply through the value detected by the detector, and when the AC power supply fault is determined, control the battery pack in the UPS system or the external battery pack to output power, and send a first control signal indicating the AC power supply fault to the control unit 14. After receiving the first control signal, the control unit 14 controls the load to power off in a time-sharing manner.

[0043] In one example, the controller stores a voltage range corresponding to the output voltage of the AC power supply and a current range corresponding to the output current of the AC power supply. When the controller detects that the voltage detected by the detector exceeds the voltage range, or the current detected by the detector exceeds the current range, it can be determined that the AC power supply has failed.

[0044] In another possible implementation, the power supply device may further include a detection device, which may be connected to the AC power supply and the control unit 14 and detect the operating parameters of the AC power supply. The control unit 14 is connected to the detection device and controls the load to be powered off in a time-sharing manner when determining that the AC power supply fails according to the value detected by the detection device.

[0045] In actual application, according to the device types of the control unit and the execution unit, the power supply device provided in the embodiment of the present application can have multiple load time-sharing power-off control modes.

[0046] Embodiment 1

[0047] The control unit may include a second switch, a first relay, and a first time relay corresponding to each execution unit one by one.

[0048] Specifically, the first end of the second switch is used to connect to the AC power supply and the UPS system, the second end of the second switch is connected to the coil of the first relay, and the second switch is turned on when receiving the first control signal, and the first control signal is sent by the UPS system when the AC power supply fails; each normally open contact of the first relay is connected between the second end of the second switch and the coil of a first time relay, and each normally open contact of the second relay is connected to a different first time relay; if the releaser in each execution unit is a shunt releaser, each delayed closing contact of each first time relay is connected between the second end of the second switch and the coil of at least one releaser in the corresponding execution unit, if the releaser in each execution unit is an undervoltage releaser, each delayed opening contact of each first time relay is connected between the first end of the first switch and the coil of at least one releaser in the corresponding execution unit, and each delayed closing contact or delayed opening contact of each first time relay is connected to a different releaser. Wherein, the total current of the releaser connected to the contact in a single first time relay is less than or equal to the maximum current allowed to pass through the first time relay.

[0049] For ease of understanding, Figure 3 Taking the power supply device structure shown in FIG. 1 as an example, two specific examples of the control unit are given below.

[0050] See also Figure 4 , is a structural diagram of a control unit provided in Example 1 of the present application. Figure 4 In the example, K2 can be regarded as the second switch, KA1 can be regarded as the first relay, KT1 can be regarded as the first time relay corresponding to the execution unit connected to the first group of output switch units, KT2 can be regarded as the first time relay corresponding to the execution unit connected to the second group of output switch units, and KT3 can be regarded as the first time relay corresponding to the execution unit connected to the third output switch unit. Wherein, L is the connection point between the UPS system and the AC power supply.

[0051] pass Figure 4When the control unit shown in the figure performs time-sharing power-off on the load, K2 is a voltage-type drive switch. When K2 receives the first control signal, it is turned on, the coil of KA1 is energized and controls the normally open contact to close. At this time, the coils KT1, KT2 and KT3 connected to the normally open contact of KA1 are energized, and the delayed closing contacts of KT1, KT2 and KT3 have different delay lengths, and are closed after the set delay lengths. When the delayed closing contact of KT1 reaches the corresponding delay length, the delayed closing contact is closed, and the coils of the four shunt releases QF1 to QF4 connected to the first group of output switch units are energized, and the shunt releases QF1 to QF4 disconnect the first group of output switch units from the rear-end load. When the delayed closing contact of KT2 reaches the corresponding delay time, the delayed closing contact is closed, and the four shunt releases QF5 to QF8 coils connected to the second group of output switch units are energized, and the shunt releases QF5 to QF8 disconnect the second group of output switch units from the rear-end load. When the delayed closing contact of KT3 reaches the corresponding delay time, the delayed closing contact is closed, and the four shunt releases QF9 to QF12 coils connected to the third group of output switch units are energized, and the shunt releases QF9 to QF12 disconnect the third group of output switch units from the rear-end load.

[0052] It should be noted that the delay time of time relays KT1, KT2 and KT3 can be set according to the connected load. For example, the delay time of KT1 can be 20S, the delay time of KT2 can be 40S, and the delay time of KT3 can be 90S.

[0053] See also Figure 5 , is a schematic diagram of the structure of another control unit provided in Example 1 of the present application. Figure 5 In the example, K2 can be regarded as the second switch, KA1 can be regarded as the first relay, KT1 can be regarded as the first time relay corresponding to the execution unit connected to the first group of output switch units, KT2 can be regarded as the first time relay corresponding to the execution unit connected to the second group of output switch units, and KT3 can be regarded as the first time relay corresponding to the execution unit connected to the third output switch unit. Wherein, L is the connection point between the UPS system and the AC power supply.

[0054] pass Figure 5When the control unit shown in the figure performs time-sharing power-off on the load, K2 is a voltage-type drive switch. When K2 receives the first control signal, it is turned on, the coil of KA1 is energized and controls the normally open contact to close. At this time, the coils KT1, KT2 and KT3 connected to the normally open contact of KA1 are energized, and the delay time lengths of the delayed disconnection contacts of KT1, KT2 and KT3 are different, and they are disconnected after the set delay time lengths. When the delayed disconnection contact of KT1 reaches the corresponding delay time length, the coils of the four undervoltage releases QF1 to QF4 connected to the first group of output switch units are de-energized, and the undervoltage releases QF1 to QF4 disconnect the first group of output switch units from the rear-end load. When the delayed disconnection contact of KT2 reaches the corresponding delay time length, the coils of the four undervoltage releases QF5 to QF8 connected to the second group of output switch units are de-energized, and the undervoltage releases QF5 to QF8 disconnect the second group of output switch units from the rear-end load. When the delayed disconnection contact of KT3 reaches the corresponding delay length, the four undervoltage releases QF9 to QF12 coils connected to the third group of output switch units are de-energized, and the undervoltage releases QF9 to QF12 disconnect the third group of output switch units from the rear-end load.

[0055] It should be noted that in the control unit provided in the first embodiment of the present application, each execution unit corresponds to a time relay. In actual application, the number of time relays corresponding to each execution unit can be set according to the number of releasers in the execution unit and the model of the releaser. For example, the maximum operating current allowed to pass through the contact of the time relay is 16A, and the execution unit includes four releasers, and the coil current of each releaser is 8A, then each execution unit needs to be configured with two corresponding time relays, and each time relay is connected to the two release coils in the corresponding execution unit.

[0056] Embodiment 2

[0057] The control unit 14 may include a third switch, a second relay, a second time relay corresponding to each execution unit on a one-to-one basis, and a first contactor corresponding to each execution unit on a one-to-one basis.

[0058] Specifically, the first end of the third switch is used to connect to the AC power supply and the UPS system, the second end of the third switch is connected to the coil of the second relay, and the third switch is turned on when receiving the first control signal. The first control signal may be sent by the internal controller of the UPS system when an AC power failure is detected. Each normally open contact of the second relay is connected between the second end of the third switch and the coil of a second time relay, and each normally open contact of the second relay is connected to a different second time relay; the delayed closing contact of each second time relay is connected between the second end of the third switch and the coil of the first contactor corresponding to the corresponding execution unit, and the delay time of each second time relay is different. If the releaser in each execution unit 13 is a shunt releaser, each normally open contact in each first contactor is connected between the second end of the third switch and the coil of at least one releaser in the corresponding execution unit 13. If the releaser in each execution unit is an undervoltage releaser, each normally closed contact in each first contactor is connected between the first end of the third switch and the coil of at least one releaser in the corresponding execution unit 13. Each normally open contact or normally closed contact of each first contactor is connected to a different releaser. The total current of the releasers connected to each normally open contact in a single first contactor is less than or equal to the maximum current allowed to pass through a single contact in the first contactor.

[0059] For ease of understanding, Figure 3 Taking the structure of the power supply device shown in the figure as an example, two specific examples of the control unit 14 are given below.

[0060] See also Figure 6 , is a structural diagram of a control unit provided in Example 2 of the present application. Figure 6 In the figure, K3 can be regarded as the third switch, KA2 can be regarded as the second relay, KT4 can be regarded as the second time relay corresponding to the execution unit connected to the first group of output switch units, KT5 can be regarded as the second time relay corresponding to the execution unit connected to the second group of output switch units, KT6 can be regarded as the second time relay corresponding to the execution unit connected to the third output switch unit, KM1 can be regarded as the first contactor corresponding to the execution unit connected to the first group of output switch units, KM2 can be regarded as the first contactor corresponding to the execution unit connected to the second group of output switch units, and KM3 can be regarded as the first contactor corresponding to the execution unit connected to the third group of output switch units. Wherein, L is the connection point between the UPS system and the AC power supply.

[0061] pass Figure 6When the control unit shown in the figure performs time-sharing power-off on the load, K3 is a voltage-type drive switch. When K3 receives the first control signal, it is turned on, the coil of KA2 is energized and controls the normally open contact to close. At this time, the coils KT4, KT5 and KT6 connected to the normally open contact of KA2 are energized, and the delayed closing contacts of KT4, KT5 and KT6 have different delay lengths, and are closed after the set delay lengths. When the delayed closing contact of KT4 reaches the corresponding delay length, the delayed closing contact closes, the coil of KM1 is energized, and the normally open contact of KM1 is closed. At this time, the coils of the four shunt releases QF1 to QF4 connected to the first group of output switch units are energized, and the shunt releases QF1 to QF4 disconnect the first group of output switch units from the rear-end load. When the delayed closing contact of KT5 reaches the corresponding delay time, the delayed closing contact is closed, the KM2 coil is energized, and the normally open contact of KM2 is closed. At this time, the four shunt releases QF5 to QF8 coils connected to the second group of output switch units are energized, and the shunt releases QF5 to QF8 disconnect the second group of output switch units from the rear-end load. When the delayed closing contact of KT6 reaches the corresponding delay time, the delayed closing contact is closed, the KM3 coil is energized, and the normally open contact of KM3 is closed. At this time, the four shunt releases QF9 to QF12 coils connected to the third group of output switch units are energized, and the shunt releases QF9 to QF12 disconnect the third group of output switch units from the rear-end load.

[0062] See also Figure 7 , is a schematic diagram of the structure of another control unit provided in Example 2 of the present application. Figure 7 In the figure, K3 can be regarded as the third switch, KA2 can be regarded as the second relay, KT4 can be regarded as the second time relay corresponding to the execution unit connected to the first group of output switch units, KT5 can be regarded as the second time relay corresponding to the execution unit connected to the second group of output switch units, KT6 can be regarded as the second time relay corresponding to the execution unit connected to the third output switch unit, KM1 can be regarded as the first contactor corresponding to the execution unit connected to the first group of output switch units, KM2 can be regarded as the first contactor corresponding to the execution unit connected to the second group of output switch units, and KM3 can be regarded as the first contactor corresponding to the execution unit connected to the third group of output switch units. Wherein, L is the connection point between the UPS system and the AC power supply.

[0063] pass Figure 7When the control unit shown in the figure performs time-sharing power-off on the load, K3 is a voltage-type drive switch. When K3 receives the first control signal, it is turned on, the coil of KA2 is energized and controls the normally open contact to close. At this time, the coils KT4, KT5 and KT6 connected to the normally open contact of KA2 are energized, and the delayed closing contacts of KT4, KT5 and KT6 have different delay lengths, and are closed after the set delay lengths. When the delayed closing contact of KT4 reaches the corresponding delay length, the delayed closing contact closes, the coil of KM1 is energized, and the normally closed contact of KM1 is disconnected. At this time, the coils of the four undervoltage releases QF1 to QF4 connected to the first group of output switch units are de-energized, and the undervoltage releases QF1 to QF4 disconnect the connection between the first group of output switch units and the rear-end load. When the delayed closing contact of KT5 reaches the corresponding delay time, the delayed closing contact is closed, the KM2 coil is energized, and the normally closed contact of KM2 is disconnected. At this time, the four undervoltage releases QF5 to QF8 connected to the second group of output switch units are de-energized, and the undervoltage releases QF5 to QF8 disconnect the second group of output switch units from the rear-end load. When the delayed closing contact of KT6 reaches the corresponding delay time, the delayed closing contact is closed, the KM3 coil is energized, and the normally closed contact of KM3 is disconnected. At this time, the four undervoltage releases QF9 to QF12 connected to the third group of output switch units are de-energized, and the undervoltage releases QF9 to QF12 disconnect the third group of output switch units from the rear-end load.

[0064] It should be understood that Figure 6 and Figure 7 As shown, in the control unit provided in the second embodiment of the present application, the coil currents of multiple releases are not transmitted through the contacts of the time relay, but are transmitted through the contacts of the contactor that can transmit large currents. Therefore, the safety of the components of the control unit can be guaranteed while realizing time-sharing power-off of the load.

[0065] Embodiment 3

[0066] The control unit 14 may include a fourth switch and a programmable logic controller (PLC).

[0067] Specifically, the first end of the fourth switch is used to connect to the AC power supply and the UPS system, and the second end of the fourth switch is connected to the PLC. Figure 3 Taking the power supply device shown in FIG. 1 as an example, the structure of the control unit is as follows: Figure 8 As shown, K4 can be regarded as the fourth switch, and L is the connection point between the UPS system and the AC power supply.

[0068] In a possible implementation, the fourth switch K4 may be a voltage-type drive switch, and the fourth switch K4 is turned on upon receiving the first control signal, wherein the first control signal is sent by the UPS system when the AC power fails. The PLC is connected to each execution unit, and is used to control the release coil in each execution unit to be energized in sequence according to the pre-stored power-off sequence of each group of execution units connected to the load when determining that the AC power fails, if the release in each execution unit is a shunt release, and after the release coil in each execution unit is energized, the release is actuated to disconnect from the load. If the release in the execution unit is an undervoltage release, the release coil in each execution unit is de-energized in sequence according to the pre-stored power-off sequence of each group of execution units connected to the load, and the release is actuated to disconnect from the load.

[0069] In a possible implementation, the control unit further includes a detection device and a control device, wherein the detection device is connected to the control device, and the control device is connected to the control end of the fourth switch K4. The detection device can detect the operation data of the AC power supply and send the detected data to the control device. When the control device detects that the voltage of the AC power supply is lower than the set working voltage or the current of the AC power supply is lower than the set working current, it determines that the AC power supply has a fault, and sends a first control signal to the fourth switch K4, thereby controlling the fourth switch K4 to be turned on.

[0070] It should be noted that the control unit structures provided in the first to third embodiments of the present application are only examples. In practice, the control unit also includes other protection devices, for example, Figures 4 to 8 The fuses in the control unit shown are connected to the UPS system and the AC power supply.

[0071] Based on the above embodiments, an embodiment of the present application further provides a cabinet, which includes a frame and the aforementioned power supply device, and the frame has a placement space inside for placing the power supply device.

[0072] In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0073] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of protection 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 equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A power supply device, characterized in that: include: An input switch unit, a plurality of groups of output switch units, an execution unit corresponding to each group of output switch units, and a control unit; The input switch unit is used to connect to the AC power supply and the UPS system, and output the electric energy output by the AC power supply or the UPS system to the multiple output switch units; Each group of output switch units is connected to the input switch unit and the corresponding execution unit, and is used to receive the electric energy output by the AC power supply or the UPS, and use the received electric energy to supply power to the load connected to the corresponding execution unit through the corresponding execution unit; Each execution unit is connected to the control unit and is used to be connected to at least one load, wherein the load connected to each execution unit is different; The control unit is used to control each execution unit to disconnect the connected load from a corresponding group of output switch units at different preset time lengths when determining that the AC power supply fails, wherein the preset time length corresponding to each execution unit is different.

2. The power supply device according to claim 1, characterized in that: Each group of output switch units includes at least one first switch, and each execution unit includes a release corresponding to each first switch in the corresponding group of output switch units.

3. The power supply device according to claim 2, characterized in that: The release is a shunt release or an undervoltage release.

4. The power supply device according to claim 2 or 3, characterized in that: The control unit includes: a second switch, a first relay, and a first time relay corresponding to each execution unit one by one; A first end of the second switch is used to connect to the AC power supply and the UPS system, a second end of the second switch is connected to the coil of the first relay, and the second switch is turned on when receiving a first control signal, wherein the first control signal is sent by the UPS system when the AC power supply fails; Each normally open contact of the first relay is connected between the second end of the second switch and a coil of a first time relay, and each normally open contact of the first relay is connected to a different first time relay; If the releaser in each execution unit is a shunt releaser, each delayed closing contact of each first time relay is connected between the second end of the second switch and the coil of at least one releaser in the corresponding execution unit; if the releaser in each execution unit is an undervoltage releaser, each delayed opening contact of each first time relay is connected between the first end of the first switch and the coil of at least one releaser in the corresponding execution unit; each delayed closing contact or delayed opening contact of each first time relay is connected to a different releaser.

5. The power supply device according to claim 4, characterized in that: The total current of the releasers connected to the contacts in a single first time relay is less than or equal to the maximum current allowed to pass through the first time relay.

6. The power supply device according to claim 2 or 3, characterized in that: The control unit comprises: a third switch, a second relay, a second time relay corresponding to each execution unit one by one, and a first contactor corresponding to each execution unit one by one; The first end of the third switch is used to connect to the AC power supply and the UPS system, the second end of the third switch is connected to the coil of the second relay, and the third switch is turned on when receiving a first control signal, wherein the first control signal is sent by the UPS system when the AC power supply fails; Each normally open contact of the second relay is connected between the second end of the third switch and the coil of a second time relay, and each normally open contact of the second relay is connected to a different second time relay; The delayed closing contact of each second time relay is connected between the second end of the third switch and the coil of the second contactor corresponding to the corresponding execution unit; wherein the delay time length of each second time relay is different; If the releaser in each execution unit is a shunt releaser, each normally open contact in each first contactor is connected between the second end of the third switch and the coil of at least one releaser in the corresponding execution unit, and if the releaser in each execution unit is an undervoltage releaser, each normally closed contact in each first contactor is connected between the first end of the third switch and the coil of at least one releaser in the corresponding execution unit, and each normally open contact or normally closed contact of each first contactor is connected to a different releaser.

7. The power supply device according to claim 6, characterized in that: The total current of the release connected to each normally open contact in a single first contactor is less than or equal to the maximum current allowed to pass through a single contact in the first contactor.

8. The power supply device according to claim 2 or 3, characterized in that: The control unit includes: a fourth switch and a programmable logic controller; The first end of the fourth switch is used to connect to the AC power supply and the UPS system, the second end of the fourth switch is connected to the programmable logic controller, and the fourth switch is turned on when receiving a first control signal, wherein the first control signal is sent by the UPS system when the AC power supply fails; The programmable logic controller is connected to each execution unit and is used to control the release coil in each execution unit to be energized for different preset time lengths when it is determined that the AC power supply fails, if the release in each execution unit is a shunt release, and to control the release coil in each execution unit to be de-energized for different preset time lengths if the release in each execution unit is an undervoltage release.

9. A cabinet, characterized in that: The invention comprises a machine frame and the power supply device according to any one of claims 1 to 8, wherein the machine frame has a placement space for placing the power supply device.

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