CN211670671U - UPS control system - Google Patents
UPS control system Download PDFInfo
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- CN211670671U CN211670671U CN201922389649.8U CN201922389649U CN211670671U CN 211670671 U CN211670671 U CN 211670671U CN 201922389649 U CN201922389649 U CN 201922389649U CN 211670671 U CN211670671 U CN 211670671U
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Abstract
The utility model discloses a UPS control system, include: the rectifier comprises a first main control module, a rectifier module and a single-phase full-bridge inversion module, wherein the output end of the first main control module is connected with the rectifier module, and the output end of the rectifier module is connected with the single-phase full-bridge inversion module. The utility model discloses can provide a modularization, standardization, strong reliability's UPS control system.
Description
Technical Field
The utility model belongs to the technical field of electrical control and specifically relates to a UPS control system is related to.
Background
With the continuous development of modern power electronic technology, computer technology and communication technology, the safe and reliable operation of the system in various fields of national economy cannot be guaranteed without the UPS. This has become a common consensus among various industries.
With the rapid development of science and technology, especially the popularization and application of various precision instruments in various industries, the reliability of power supply quality and power supply continuity become more and more important for users, the demand for standby power supplies is increasing, and how to make the power supply stable and reliable is a problem of ever-growing interest. Especially for special equipment at some important positions, people not only pay attention to the power supply quality, namely the stability and the discontinuity of a power supply, but also pay more attention to the quality index of the power supply. Since the power of such equipment is unstable or lost, which causes huge loss, even irreparable loss, fortunately, the occurrence of the ups (uninterruptible power supply) provides a broad prospect for solving the problem.
At present, with the development of modern high-tech technology and the continuous development of IT technology and communication technology, the technology of the UPS power supply itself is continuously developed, and thus the control requirement of the UPS is higher and higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a UPS control system can provide a modularization, standardized, the UPS control system of good reliability.
In a first aspect, an embodiment of the present invention provides a UPS control system: the method comprises the following steps:
the rectifier comprises a first main control module, a rectifier module and a single-phase full-bridge inversion module, wherein the output end of the first main control module is connected with the rectifier module, and the output end of the rectifier module is connected with the single-phase full-bridge inversion module; the transformer module is connected with the first filtering module, the first filtering module is connected with the rectifying module, the first filtering module is further connected with the voltage and current detection module, and the voltage and current detection module is connected with the first main control module.
The utility model discloses UPS control system has following beneficial effect at least: the commercial power supply with poor electric energy quality can be changed into a direct-current power supply through the rectification module, and then the rectified direct-current power supply is changed into a high-quality sine wave power supply through the single-phase full-bridge inversion module to supply power to the load.
According to the utility model discloses a UPS control system of other embodiments still includes second host system module, second filtering module, second voltage current detection module, switch module, second host system module connects single-phase full-bridge contravariant module, single-phase full-bridge contravariant module connects the second filtering module, second filtering module connects the switch module, second filtering module still connects second voltage current detection module.
According to the utility model discloses a UPS control system of other embodiments still includes battery module, battery module connect respectively the rectifier module with single-phase full-bridge contravariant module.
According to the utility model discloses a UPS control system of other embodiments, host system is the DSP chip.
According to another embodiment of the present invention, the rectifier module is a single-phase voltage type PWM rectifier module.
According to another embodiment of the present invention, a UPS control system, the single-phase full-bridge inverter module includes a driving unit, and the driving unit includes an N-channel MOSFET.
Drawings
Fig. 1 is a block diagram of an embodiment of a UPS control system according to the present invention;
fig. 2 is a block diagram of another embodiment of a UPS control system according to the present invention;
fig. 3 is a block diagram of another embodiment of a UPS control system according to the present invention;
fig. 4 is a block diagram of another embodiment of a UPS control system according to the present invention;
fig. 5 is a schematic circuit diagram of an embodiment of a rectifier module of a UPS control system according to the present invention;
fig. 6 is a schematic circuit diagram of an embodiment of a single-phase full-bridge inverter module of a UPS control system according to the present invention;
fig. 7 is a schematic circuit diagram of an embodiment of a battery module of a UPS control system.
Detailed Description
The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Embodiment 1, referring to fig. 1, is a block diagram of a UPS control system according to an embodiment of the present invention. The method specifically comprises the following steps: the rectifier comprises a first main control module, a rectifier module and a single-phase full-bridge inversion module, wherein the output end of the first main control module is connected with the rectifier module, and the output end of the rectifier module is connected with the single-phase full-bridge inversion module.
Specifically, the rectification module is a single-phase voltage type PWM rectification module, and it can be understood that the rectification module is a front-end device of the UPS system.
In particular, with reference to FIG. 5, usIs the electric network side electromotive force, LsThe filter inductor is a filter inductor and mainly used in a circuit for filtering out higher harmonics of input current at an alternating current side, storing energy and transmitting the energy to a direct current side, so that the effect of isolating voltage at the alternating current side from electromotive force of a power grid is achieved, and current passing through the filter inductor can generate small fluctuation. VD1-VD4Are four freewheeling diodes. The output capacitor C converts the pulsating direct current into a relatively stable direct current, namely, the ripple waves are filtered; RL acts as a voltage divider and may form a branch voltage.
Specifically, the embodiment specifically adopts a single-phase voltage type sinusoidal PWM rectification module, and it can be understood that the sinusoidal PWM wave is generated by comparing a sinusoidal wave signal with a triangular carrier signal, and the generated sinusoidal PWM wave is paired with V1-V4Four power switches are driven. This generates a sinusoidal PWM wave, denoted u, between the AC sides ABAB，uABContaining a fundamental component of frequency and amplitude proportional to the input sine wave signal, and uABAlso contains higher harmonics associated with the triangular carrier frequency. It can be understood that, in order to realize the same phase of the input power voltage and current at the ac side, the control signal is required to be a PWM signal synthesized by a sine wave. It will be understood that the inductor current is intended to be denoted as isIs the same as the frequency of the input power supply, it is necessary to ensure that the frequency of the sinusoidal signal is the same as the frequency of the input power supply, so when u is the samesA certain value isBoth the amplitude and the phase of (d) are determined by uABMiddle fundamental component and its sum usIs determined by the phase difference of (a).
Specifically, single-phase full-bridge contravariant module includes drive unit, and above-mentioned drive unit includes N channel MOSFET, has advantages such as low price, high withstand voltage, heavy current.
Specifically, referring to fig. 6, in a specific circuit of the single-phase full-bridge inverter module, resistors R1-R4, C1-C4 and D1-D4 form a buffer circuit, and a front end PWM of the UPS system is rectified and then charged into a left capacitor C to provide a stable dc voltage to a main circuit. The voltage and current waveforms borne by the power electronic devices in the circuit at the turn-on and turn-off moments can be improved, and the buffer circuit is simple in structure, low in cost and easy to implement.
Specifically, in the circuit shown in fig. 6, the size of the load inductor L is 3.5mH, the size of the capacitor C0 is 30 μ F, the size of the load resistor is 10K, the resistances of R1-R4 are 51 Ω/2W, the resistances of C1-C4 are 1000pF, and meanwhile, the direct-current side voltage is 400V direct-current voltage obtained after rectification.
It can be understood that, as an indispensable part in the UPS system, the single-phase full-bridge inverter module in this embodiment can output stable and high-quality power frequency ac, and the output ac phase is the same as the grid potential, and when the grid is powered off or has a negative sudden change, the inverter and the utility power are switched, so as to ensure the normal operation of the electric equipment.
Embodiment 2, referring to fig. 2, is a block diagram of another embodiment of the UPS control system according to the present invention. On the basis of the embodiment 1, the power supply further comprises a transformer module, a first filtering module and a first voltage and current detection module, wherein the transformer module is connected with the first filtering module, the first filtering module is connected with the rectifying module, the first filtering module is further connected with the voltage and current detection module, and the voltage and current detection module is connected with the first main control module.
Specifically, the transformer module selects a common transformer unit, and can adjust the input mains voltage so as to meet the requirements of different UPS systems.
Specifically, the first filtering module selects a commonly used filtering unit, and can effectively filter a frequency point of a specific frequency in the power line or frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency.
Specifically, the first voltage and current detection module is a voltage and current detection unit which is universal, easy to implement and low in cost, for example, a single-phase voltage and current detection module with the model number of JSY1003A, and can detect the voltage or the current in the system so as to compare the voltage or the current with a reference voltage or the current and feed the voltage or the current back to the main control module in time.
Embodiment 3, referring to fig. 3, is a block diagram of another embodiment of the UPS control system according to the present invention. On the basis of embodiment 2, still include second host system module, second filtering module, second voltage electric current detection module, switch module, the second host system module is connected single-phase full-bridge contravariant module, single-phase full-bridge contravariant module connect the second filtering module, and the second filtering module is connected switch module, and the second filtering module still is connected second voltage electric current detection module.
The object of this embodiment is a second set of control system designed for use when the backup power source or battery is activated.
Embodiment 4, referring to fig. 4, is a block diagram of another embodiment of the UPS control system according to the present invention. The power supply further comprises a storage battery module which is respectively connected with the rectifying module and the single-phase full-bridge inverter module on the basis of the embodiment 3.
Specifically, this embodiment can realize that the direct current that rectifier module obtained charges for inside battery module to when the commercial power broke down or the power failure, the battery can provide dc power supply for single-phase full-bridge contravariant module, just so can make UPS continue to work, thereby really realize incessant heap consumer power supply.
Specifically, referring to fig. 7, a battery charging and discharging circuit of the battery module is composed of devices such as a switching tube, an inductor, and a capacitor, and specifically, battery charging and discharging is controlled by power switching tubes T1 and T2.
Specifically, in the storage battery charging link, a voltage reduction circuit is formed by L1, L2, T2 and D1, the voltage of a 400V direct-current bus is reduced to a fixed value, then the battery is charged, and the charging is divided into two stages:
the first stage is as follows: at the moment, constant current charging is adopted, and the voltage of the battery is small in the initial charging stage, so that the charging current is too large, and the battery is easy to burn out, and therefore, the constant current charging is adopted in the stage;
the second stage is as follows: the constant voltage charging is carried out, after the charging is carried out for a period of time, the voltage in the storage battery reaches a certain value, the constant voltage charging can be changed into the constant voltage charging, and the problem of large current burnout is not worried.
Specifically, the storage battery discharging link is a booster circuit composed of L1, L2, T1 and D2, when the commercial power connected to the input end of the UPS device works normally, the storage battery boosting discharging link does not work, and once the commercial power fails or is powered off, the storage battery boosting link works immediately to boost the battery voltage to 400V and provide direct-current voltage for the inverter module.
The first main control module and the second main control module related to the above embodiments are DSP chips, and specifically, a model of the DSP chip is TMS320F2812 digital signal processor, but the present invention is not limited to the above processors, and other models of processors may be used instead of or in combination with the above processors.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (6)
1. A UPS control system, comprising:
the rectifier comprises a first main control module, a rectifier module and a single-phase full-bridge inversion module, wherein the output end of the first main control module is connected with the rectifier module, and the output end of the rectifier module is connected with the single-phase full-bridge inversion module;
the transformer module is connected with the first filtering module, the first filtering module is connected with the rectifying module, the first filtering module is further connected with the first voltage and current detection module, and the first voltage and current detection module is connected with the first main control module.
2. The UPS control system of claim 1, further comprising a second main control module, a second filtering module, a second voltage and current detection module, and a switch module, wherein the second main control module is connected to the single-phase full-bridge inverter module, the single-phase full-bridge inverter module is connected to the second filtering module, the second filtering module is connected to the switch module, the switch module is used for connecting an external load, the second filtering module is further connected to the second voltage and current detection module, and the second voltage detection module is connected to the second main control module.
3. The UPS control system of claim 2, further comprising a battery module, wherein the battery module is connected to the rectifier module and the single-phase full-bridge inverter module respectively.
4. A UPS control system according to any of claims 1-3, wherein the first and second master control modules are DSP chips.
5. The UPS control system of claim 1, wherein the rectifier module is a single-phase voltage type PWM rectifier module.
6. The UPS control system of claim 1, wherein the single-phase full-bridge inverter module comprises a drive unit comprising an N-channel MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922389649.8U CN211670671U (en) | 2019-12-26 | 2019-12-26 | UPS control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922389649.8U CN211670671U (en) | 2019-12-26 | 2019-12-26 | UPS control system |
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| Publication Number | Publication Date |
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| CN211670671U true CN211670671U (en) | 2020-10-13 |
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| CN201922389649.8U Active CN211670671U (en) | 2019-12-26 | 2019-12-26 | UPS control system |
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