CN218413317U

CN218413317U - Pressure stabilizing device for underground UPS

Info

Publication number: CN218413317U
Application number: CN202122484637.0U
Authority: CN
Inventors: 刘中杰; 卜海滨; 庞现泽; 匡欣欣; 张建设
Original assignee: Shanghai Sany Electronic Technology Co ltd
Current assignee: Shanghai Sany Electronic Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2023-01-31
Anticipated expiration: 2031-10-15

Abstract

The utility model provides a steady voltage equipment for UPS in pit, includes voltage regulator device, controlling means and the inverter that charges, voltage regulator device includes that AC input end, multiple input output take a percentage transformer and AC output, controlling means includes acquisition circuit unit, drive circuit unit, single chip unit and for the power supply unit of each unit power supply. The utility model provides the high output stability has enlarged the voltage regulation scope, and simultaneously, the surge voltage that produces when the transformer switches the gear is difficult to spread into charging inverter and leads to its work unusual, has prolonged charging inverter's life.

Description

Pressure stabilizing device for underground UPS

Technical Field

The utility model belongs to the technical field of the electric wire netting, especially, relate to a steady voltage equipment for UPS in pit.

Background

Along with the construction and development of national intelligent mines, the requirements on the underground power supply quality of coal mines are more and more strict, and some key electric equipment requires an uninterruptible power supply (hereinafter referred to as UPS).

As shown in fig. 2, in the conventional interactive UPS, the inverter motherboard directly controls the relay on the output side of the transformer so as to select the output gear of the transformer, thereby stabilizing the output voltage, and since the relay is directly controlled by the inverter motherboard, on one hand, the surge voltage generated when the transformer switches the gear is easily transmitted to the inverter motherboard, which causes the operation of the inverter motherboard to be abnormal, on the other hand, the operating time of the inverter motherboard is increased, and the service life of the inverter motherboard is reduced.

In addition, the fluctuation range of the downhole power load is large, so that the fluctuation range of the downhole power supply voltage is large, and a larger voltage regulation range is also required.

SUMMERY OF THE UTILITY MODEL

Based on this, in order to solve the technical problem, a voltage stabilizing device for a downhole UPS is provided.

The utility model adopts the technical scheme as follows:

the utility model provides a steady voltage equipment for UPS in pit which characterized in that, includes voltage regulator device, controlling means and charging inverter, voltage regulator device includes that AC input end, many input/output take a percentage transformer and AC output, AC input end with the winding input of transformer is connected, and this AC input end with set up primary relay respectively between a plurality of input taps of winding input end, AC output end with the winding output of transformer and charging inverter are connected, and this AC output end with set up secondary relay respectively between a plurality of output taps of winding output, controlling means includes acquisition circuit unit, drive circuit unit, singlechip unit and the power supply unit for each unit power supply, acquisition circuit unit with AC output end connects, drive circuit unit with primary relay and secondary relay connect, singlechip unit with acquisition circuit unit and drive circuit unit connect, power supply unit with AC input end connects.

The utility model discloses input and output at voltage regulator's transformer all set up the relay, can control more voltage gears through controlling means like this, the output stability has been improved, the voltage regulation scope of voltage regulator's alternating current output end has been enlarged simultaneously, furthermore, voltage regulation control and the inverter separation that charges, carry out voltage regulation control by controlling means, the inverter autonomous working that charges, uncontrolled relay carries out the transformer gear and switches, and thus, the surge voltage that produces when the transformer switches the gear is difficult to spread into the inverter that charges and leads to its work anomaly, the operating time of the inverter that charges has also been reduced, the life of the inverter that charges has been prolonged.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a voltage stabilization schematic diagram of a conventional downhole UPS.

Detailed Description

As shown in fig. 1, an embodiment of the present disclosure provides a voltage stabilizing apparatus for a downhole UPS, which includes a voltage stabilizing device 110, a control device 120, and a charging inverter device 130.

The voltage stabilizer 110 includes an ac input terminal 111, a multiple input and output tap transformer 112, an ac output terminal 113, a surge absorbing circuit unit 114, and a filter circuit unit 115.

The ac input end 111 is used for accessing an uninterruptible power supply, is connected to the winding input end a of the transformer 112, and supplies power to the control device 120, and primary relays 116 are respectively disposed between the ac input end 111 and a plurality of input taps (tap a 1/tap a 2/tap a 3) of the winding input end a, the ac output end 113 is connected to the winding output end B of the transformer 112, the control device 120, and the charging inverter device 130, and secondary relays 117 are respectively disposed between the ac output end 113 and a plurality of output taps (tap B1/tap B2/tap B3/tap B4) of the winding output end B, and both the primary relays 116 and the secondary relays 117 are connected to the control device 120.

The control device 120 controls the input gear of the transformer 112 through the primary relay 116, and the control device 120 controls the output gear of the transformer 112 through the secondary relay 117, so that more voltage gears can be controlled, the output stability is improved, and the voltage regulation range of the alternating current output end 113 of the voltage stabilizer 110 is expanded.

The surge absorption circuit unit 114 is connected between any output tap of the winding output end B and the common end G, and absorbs a surge voltage generated instantaneously due to switching of the transformer, so as to prevent interference with the single chip microcomputer and the post-stage charging inverter 130, and the surge voltage is absorbed by the surge absorption circuit unit 114, so that a main factor that the underground uninterruptible alternating-current power supply is interfered and works abnormally is eliminated, and of course, the surge absorption circuit unit 114 can be omitted.

Filter circuit unit 115 is connected with AC output terminal 113, because electrical equipment is of a great variety in the pit, it is serious to lead to the higher harmonic to pollute in the circuit, filter circuit unit 115 can be used for purifying AC output terminal 113's voltage, make the voltage that gets into back level charging inverter 130 be pure sine wave, charging inverter 130 is after the bypass switches, can directly output pure voltage, the harmonic has also been avoided simultaneously and has been caused charging inverter 130 to work unusually, of course, to the not serious scene of higher harmonic pollution, filter circuit unit 115 also can be left out.

The control device 120 comprises an acquisition circuit unit 121, a driving circuit unit 122, a single chip unit 123 and a power supply unit 124 for supplying power to the units, wherein the acquisition circuit unit 121 is connected with the alternating current output end 113, the driving circuit unit 122 is connected with the primary relay 116 and the secondary relay 117, the single chip unit is connected with the acquisition circuit unit and the driving circuit unit, and the power supply unit 124 is connected with the alternating current input end 111 so as to supply power to the units.

The single chip unit 123 collects the voltage of the ac output terminal 113 through the collection circuit unit 121, and controls the primary relay 116 and the secondary relay 117 to switch through the driving circuit unit 122 according to the collected voltage, thereby performing voltage stabilization control.

The charging inversion device 130 is used for charging, bypassing or inversion output work, when the charging inversion device is switched to the bypass, high-quality voltage is directly output, voltage stabilization control is separated from the charging inversion device 130, the charging inversion device 130 works independently, and a relay is not controlled to switch the gear of the transformer, so that surge voltage generated when the gear of the transformer is switched is not easy to transmit into the charging inversion device 130 to cause abnormal work of the charging inversion device 130, meanwhile, the working time of the charging inversion device 130 is also reduced, and the service life of the charging inversion device 130 is prolonged.

However, those skilled in the art should recognize that the above embodiments are only for illustrating the present invention, and not to be used as a limitation of the present invention, and that the changes and modifications to the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.

Claims

1. The utility model provides a steady voltage equipment for UPS in pit, its characterized in that, includes voltage regulator device, controlling means and the inverter that charges, voltage regulator device includes that AC input end, many input/output take a percentage transformer and AC output, AC input end with the winding input of transformer is connected, and this AC input end with set up primary relay between a plurality of input taps of winding input end respectively, AC output end with the winding output of transformer and the inverter that charges are connected, and this AC output end with set up secondary relay between a plurality of output taps of winding output end respectively, controlling means includes acquisition circuit unit, drive circuit unit, singlechip unit and the power supply unit for each unit power supply, acquisition circuit unit with AC output end connects, drive circuit unit with primary relay and secondary relay connect, singlechip unit with acquisition circuit unit and drive circuit unit connect, power supply unit with AC input end connects.

2. The voltage stabilization apparatus for a downhole UPS according to claim 1, wherein the voltage stabilization device further comprises a surge absorption circuit unit connected between any output tap of the winding output terminals and a common terminal.

3. A voltage stabilizing apparatus for a downhole UPS according to claim 1 or 2, wherein the voltage stabilizing device further comprises a filter circuit unit, the filter circuit unit being connected to the ac output terminal.