Multi-path different-voltage output power supply

Abstract

The utility model discloses a multipath different voltage output power supply, comprising a monitoring circuit, a monitoring control unit, an output monitoring balance unit, a charging and discharging converter, a lightning stroke EMI circuit, a PFC circuit, a power DCDC converter, and a DCDC converter. Compared with the prior art, the charging and discharging of the battery are smoothly controlled by adopting a soft and hard combined mode, the instantaneous actions of charging and discharging of the battery caused by external fluctuation interference are avoided, the internal structure of the battery is protected, and the long-term and effective use is realized. The output modular design is adopted, the application is simple and convenient in the aspects of adjustment, replacement and control, the multi-output state combination and control are easy, and the design process and the space volume can be saved. Compared with a common power supply, the power supply is more widely used, meanwhile, the requirement for customer capability is lowered, customers only need to conduct mechanical installation, and troubleshooting is simple and efficient. And parallel operation redundancy use of power supplies of the same specification is supported, and the system power supply stability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a multi-channel power supply with different voltage outputs. Background Art

[0002] At present, most uninterruptible power supply systems on the market are mainly based on AC input and AC output. In special fields and industries, customers have special requirements. In the form of AC input, DC multi-channel output and parallel operation, conventional uninterruptible power supply systems are difficult to meet users' requirements for multi-channel DC output and stable and reliable dual parallel operation. In view of this problem, we have proposed an uninterruptible circuit design with multiple channels of different voltage outputs to solve the gaps in users and the market, and it is widely used among users. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model discloses a multi-channel power supply with different voltage outputs, comprising a monitoring circuit, a monitoring control unit, an output monitoring balancing unit, a charge and discharge converter, a lightning EMI circuit, a PFC circuit, a power DCDC converter, and a DCDC converter; the mains power is respectively connected to the monitoring circuit and the lightning EMI circuit; the output end of the monitoring circuit is connected to the input end of the control power supply circuit, the output end of the control power supply circuit is connected to the input end of the monitoring control unit, the output end of the monitoring control unit is connected to the input end of the output monitoring balancing unit and the input end of the charge and discharge converter; the output end of the lightning EMI circuit is connected to the input end of the PFC circuit, the output end of the PFC circuit and the output end of the charge and discharge converter are connected to the input end of the power DCDC converter; the output end of the power DCDC converter and the output end of the output monitoring balancing unit are respectively connected to the input ends of the multi-channel DCDC converters.

[0004] As a preferred technical solution of the utility model, the mains power input is transmitted through the monitoring circuit to the control power supply circuit to supply power to the monitoring control unit.

[0005] As a preferred technical solution of the utility model, the AC power input is input into the detection control unit after the voltage and current are monitored and identified by the monitoring circuit; if the electrical signal meets the standard, the PFC, ACDC converter, charge and discharge converter, and DCDC converter in the startup circuit will output normally, otherwise an alarm will be issued.

[0006] As a preferred technical solution of the utility model, the AC power is input into the PFC circuit after the noise is filtered out by the lightning EMI circuit to improve the harmonic response, so that its voltage reaches DC390V, and then converted into a common reference voltage DC56V for the subsequent circuit through the power DCDC converter. The reference voltage is used to power the charge and discharge converter and the DCDC converter at the same time.

[0007] As a preferred technical solution of the utility model, when the DCDC converter is powered, it normally outputs the reference set voltage, which is judged by the output monitoring balance unit to the detection control unit; if the output meets the set parameters, it is output normally, otherwise the corresponding DCDC converter or charge and discharge converter is directly turned off.

[0008] As a preferred technical solution of the utility model, when the mains power is suddenly disconnected, the control unit is powered by the charge-discharge converter, so that the detection control unit operates normally. At the same time, the charge-discharge converter supplies power to the subsequent DCDC converter to ensure the continuity of the output.

[0009] As a preferred technical solution of the utility model, the detection control unit adopts a TMS320F28035 controller.

[0010] Beneficial effects of the utility model: The utility model adopts a combination of soft and hard modes to smoothly control the charging and discharging of the battery, avoiding the instantaneous action of battery charging and discharging caused by external fluctuations, protecting the internal structure of the battery, achieving long-term and effective use, and extending the battery life. Compared with similar products, this design adopts an output modular design, which is easy to use in terms of adjustment, replacement and control, and is easy to combine and control with multiple output states, which can save design process and space volume. Compared with ordinary power supplies, it has a wider range of uses and reduces the requirements on customer capabilities. Customers only need to do mechanical installation, and troubleshooting is simple and efficient. It also supports the redundant use of power supplies of the same specifications, and the system power supply stability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following will briefly introduce the drawings required for the specific implementation or the prior art description. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0012] Figure 1 This is the principle diagram of the utility model;

[0013] Figure 2 This is the wiring diagram of the main controller of the control unit of the utility model;

[0014] Figure 3 It is the main control circuit of the charging and discharging converter of the utility model; DETAILED DESCRIPTION

[0015] Example 1

[0016] like Figures 1 to 3As shown, the utility model discloses a multi-channel power supply with different voltage outputs, including a monitoring circuit, a monitoring control unit, an output monitoring balancing unit, a charge and discharge converter, a lightning EMI circuit, a PFC circuit, a power DCDC converter, and a DCDC converter; the mains is respectively connected to the monitoring circuit and the lightning EMI circuit; the output end of the monitoring circuit is connected to the input end of the control power supply circuit, the output end of the control power supply circuit is connected to the input end of the monitoring control unit, the output end of the monitoring control unit is connected to the input end of the output monitoring balancing unit and the input end of the charge and discharge converter; the output end of the lightning EMI circuit is connected to the input end of the PFC circuit, the output end of the PFC circuit and the output end of the charge and discharge converter are connected to the input end of the power DCDC converter; the output end of the power DCDC converter and the output end of the output monitoring balancing unit are respectively connected to the input ends of the multi-channel DCDC converters. The AC input is input to the detection control unit after the voltage and current are monitored and identified by the monitoring circuit; when the electrical signal meets the standard, the PFC, ACDC converter, charge-discharge converter, and DCDC converter in the start-up circuit are normally output; the AC input is input to the PFC circuit after the lightning EMI circuit filters out the noise to improve the harmonic response, so that its voltage reaches DC390V, and then converted into a common reference voltage DC56V for the subsequent circuit by the power DCDC converter. The reference voltage is used to power the charge-discharge converter and the DCDC converter at the same time. When the DCDC converter is powered, the reference setting voltage is normally output, and the output is judged by the output monitoring balance unit to the detection control unit. If the output meets the set parameters, it is normally output. The uninterrupted charge-discharge converter is switched through the active and passive control units, with active hardware switching as the main and passive switching as the auxiliary, to enhance the stability and reliability of the charge-discharge converter, reduce the misjudgment rate, shorten the switching time, and make the switching smooth. The PVB and PBA ports are directly connected to the VBA and PVB ports of the detection control unit for internal chip judgment and control.

[0017] Working principle of the utility model: The utility model uses the mains input to power the monitoring control unit through the monitoring circuit to control the power supply circuit to enable it to operate normally. The monitoring circuit monitors and identifies the voltage and current of the mains input, and inputs it to the detection control unit. If the electrical signal meets the standard, the PFC, ACDC converter, charge and discharge converter, and DCDC converter in the start circuit are normally output, otherwise an alarm is issued. When the DCDC converter is powered, it normally outputs the reference setting voltage (or DC15V, DC12V, DC28V), and is judged by the output monitoring balance unit to the detection control unit. If the output meets the set parameters, it is normally output, otherwise the corresponding DCDC converter or charge and discharge converter is directly turned off. When the DCDC converter is connected to the load, if the output power needs to be increased, the two-module parallel function can be selected. At this time, the output monitoring balance unit is required to balance the output between the modules. The characteristics of this design are that it is mainly based on active hardware switching and supplemented by passive switching, which enhances the stability and reliability of the charge and discharge converter, reduces the misjudgment rate, shortens the switching time, and makes its switching smooth transition. The PVB and PBA ports are directly connected to the VBA and PVB ports of the detection control unit for internal chip judgment and control. When the multi-channel DCDC converter outputs correctly, it needs to detect the control unit to determine the output. If there is an abnormality in the output, there is no output. When dual-port merging is required, the output detection and balancing unit can be used to achieve the current sharing effect of multi-port outputs, and the switching state of the DCDC unit can be detected at the same time to make the dual-port outputs achieve the same electrical parameters.

[0018] Components not described in detail herein are prior art.

[0019] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. A power supply with multiple output voltages, characterized in that: It includes a monitoring circuit, a monitoring control unit, an output monitoring balancing unit, a charge and discharge converter, a lightning EMI circuit, a PFC circuit, a power DCDC converter, and a DCDC converter; the AC power is respectively connected to the monitoring circuit and the lightning EMI circuit; the output end of the monitoring circuit is connected to the input end of the control power supply circuit, the output end of the control power supply circuit is connected to the input end of the monitoring control unit, the output end of the monitoring control unit is connected to the input end of the output monitoring balancing unit and the input end of the charge and discharge converter; the output end of the lightning EMI circuit is connected to the input end of the PFC circuit, the output end of the PFC circuit and the output end of the charge and discharge converter are connected to the input end of the power DCDC converter; the output end of the power DCDC converter and the output end of the output monitoring balancing unit are respectively connected to the input ends of the multi-channel DCDC converters.

2. A power supply with multiple outputs of different voltages according to claim 1, characterized in that: The mains power input is transmitted through the monitoring circuit to the control power supply circuit to supply power to the monitoring control unit.

3. A power supply with multiple outputs of different voltages according to claim 1, characterized in that: The AC input is input into the detection control unit after its voltage and current are monitored and identified by the monitoring circuit; if the electrical signal meets the standard, the PFC, ACDC converter, charge and discharge converter, and DCDC converter in the startup circuit will output normally, otherwise an alarm will be sounded.

4. A power supply with multiple outputs of different voltages according to claim 1, characterized in that: After the lightning EMI circuit filters out noise, the AC power is input into the PFC circuit to improve the harmonic response, so that its voltage reaches DC390V, and then converted into a common reference voltage of DC56V for the subsequent circuit through the power DCDC converter. The reference voltage also powers the charge and discharge converter and the DCDC converter.

5. A power supply with multiple outputs of different voltages according to claim 1, characterized in that: When the DCDC converter is powered, it will normally output the reference setting voltage, which will be judged by the output monitoring balance unit to the detection control unit; if the output meets the set parameters, it will be output normally, otherwise the corresponding DCDC converter or charge and discharge converter will be directly turned off.

6. A power supply with multiple outputs of different voltages according to claim 1, characterized in that: When the mains power is suddenly disconnected, the control unit is powered by the charge-discharge converter, so that the detection control unit operates normally. At the same time, the charge-discharge converter supplies power to the subsequent DCDC converter to ensure the continuity of the output.

7. A power supply with multiple outputs of different voltages according to claim 1, characterized in that: The monitoring control unit adopts a TMS320F28035 controller.

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