Uninterruptible computer power supply system

Abstract

The present invention relates to the technical field of power supply systems, in particular to an uninterruptible computer power supply system, comprising an input rectifier circuit, a PFC correction circuit, a PWM power conversion circuit, a synchronous rectifier circuit, a power supply, a charging circuit, an output voltage stabilizing and boosting circuit, a first output synchronous rectifier circuit, a second output synchronous rectifier circuit and a switch circuit. During the normal power supply period of the mains, the power supply is charged by the charging circuit. During the power outage period, the power supply provides power and is converted into a voltage required by the computer by the output voltage stabilizing and boosting circuit to supply power to the computer. The present invention directly converts the mains into a 12V DC voltage, and then converts the DC 12V voltage into other low-voltage DC voltages and various timing signals required by the computer. During the power supply period of the power supply, the output voltage of the power supply is provided to the input of a secondary DC power supply after voltage stabilization and boosting, thereby eliminating the inverter circuit, reducing the volume of the power supply and improving the conversion efficiency of the power supply.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to an uninterruptible computer power supply system. Background Art

[0002] All-in-one computers are generally powered by AC power. During the power supply process, due to sudden power outages, it is easy for users to fail to save the files they are creating in time, resulting in file loss and even damage to the computer hardware. Therefore, there is an urgent need for an uninterruptible computer power supply system that can continue to power the computer after a power outage. Summary of the invention

[0003] The present invention aims at solving the problems in the prior art and provides an uninterruptible computer power supply system which can continue to supply power to a computer after a power failure.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides an uninterruptible computer power supply system, comprising an input rectifier circuit, a PFC correction circuit, a PWM power conversion circuit, a synchronous rectifier circuit, a power supply, a charging circuit, an output voltage stabilization and boosting circuit, a first output synchronous rectifier circuit, a second output synchronous rectifier circuit and a switch circuit, wherein the input end of the input rectifier circuit is connected to the mains, the output end of the rectifier circuit is connected to the input end of the PFC correction circuit, the output end of the PFC correction circuit is connected to the input end of the PWM power conversion circuit, and the PWM The output end of the power conversion circuit is connected to the input end of the synchronous rectification circuit, the input end of the charging circuit is connected to the output end of the synchronous rectification circuit, the output end of the charging circuit is electrically connected to the charging end of the power supply, the power supply end of the power supply is connected to the input end of the output voltage stabilizing boost circuit, the input end of the first output synchronous rectification circuit is respectively connected to the output end of the synchronous rectification circuit and the output end of the output voltage stabilizing boost circuit, the input end of the second output synchronous rectification circuit is respectively connected to the output end of the synchronous rectification circuit and the output end of the output voltage stabilizing boost circuit, and the output end of the second output synchronous rectification circuit is electrically connected to the switching circuit.

[0006] Preferably, the uninterruptible computer power supply system also includes a fan drive circuit, a temperature sensing circuit and a sixth voltage sampling circuit, the input end of the fan drive circuit is respectively connected to the output end of the synchronous rectification circuit and the output end of the output voltage stabilization and boost circuit, the temperature sensing circuit is connected to the input end of the sixth voltage sampling circuit, and the output end of the sixth voltage sampling circuit is electrically connected to the fan drive circuit.

[0007] Preferably, the uninterruptible computer power supply system further comprises a timing output circuit and a PG signal generating circuit, the timing output circuit is electrically connected to the switch, and the PG signal generating circuit is electrically connected to the timing output circuit.

[0008] Preferably, the first output synchronous rectification circuit is respectively connected to a first synchronous rectification circuit driving circuit, a first current sampling circuit and a first voltage sampling circuit.

[0009] Preferably, the second output synchronous rectification circuit is connected to a second synchronous rectification circuit driving circuit, a second current sampling circuit and a second voltage sampling circuit respectively.

[0010] Preferably, the PFC correction circuit is connected to a PFC driving circuit, a third current sampling circuit and a third voltage sampling circuit.

[0011] Preferably, the PWM power conversion circuit is connected to a PWM drive circuit, a fourth current sampling circuit and a fourth voltage sampling circuit.

[0012] Preferably, the synchronous rectification circuit is connected to a synchronous rectification circuit driving circuit, a fifth current sampling circuit and a fifth voltage sampling circuit.

[0013] Preferably, the power supply is connected to a power indication circuit.

[0014] Beneficial effects of the present invention:

[0015] The present invention provides an uninterruptible computer power supply system, including an input rectification circuit, a PFC correction circuit, a PWM power conversion circuit, a synchronous rectification circuit, a power supply, a charging circuit, an output voltage stabilization and boosting circuit, a first output synchronous rectification circuit, a second output synchronous rectification circuit and a switch circuit. During the normal power supply period of the mains, the present invention charges the power supply through the charging circuit. During the power outage period, the power supply provides electricity and is converted into a voltage required by the computer through the output voltage stabilization and boosting circuit to power the computer. Compared with the traditional power supply system, the present invention directly converts the mains into a 12V DC voltage, and then converts the DC 12V voltage into other low-voltage DC voltages and various timing signals required by the computer. In addition, during the power supply period of the power supply, the output voltage of the power supply is provided to the input of the secondary DC power supply after voltage stabilization, subtracting the inverter circuit, greatly reducing the volume of the power supply and improving the conversion efficiency of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the framework principle diagram of the present invention. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0018] like Figure 1 As shown, the present invention provides an uninterruptible computer power supply system, including an input rectifier circuit, a PFC correction circuit, a PWM power conversion circuit, a synchronous rectifier circuit, a power supply, a charging circuit, an output voltage stabilizing and boosting circuit, a first output synchronous rectifier circuit, a second output synchronous rectifier circuit and a switch circuit, wherein the input end of the input rectifier circuit is connected to the mains, the output end of the input rectifier circuit is connected to the input end of the PFC correction circuit, the output end of the PFC correction circuit is connected to the input end of the PWM power conversion circuit, and the output end of the PWM power conversion circuit is connected to the input end of the synchronous rectifier circuit. The input end of the charging circuit is connected to the output end of the synchronous rectification circuit, the output end of the charging circuit is electrically connected to the charging end of the power supply, the power supply end of the power supply is connected to the input end of the output voltage stabilizing boost circuit, the input end of the first output synchronous rectification circuit is respectively connected to the output end of the synchronous rectification circuit and the output end of the output voltage stabilizing boost circuit, the input end of the second output synchronous rectification circuit is respectively connected to the output end of the synchronous rectification circuit and the output end of the output voltage stabilizing boost circuit, and the output end of the second output synchronous rectification circuit is electrically connected to the switch circuit, During the normal power supply period of the mains, the present invention charges the power supply through the charging circuit. During the power outage period, the power supply provides electricity and converts it into the voltage required by the computer through the output voltage stabilizing and boosting circuit to power the computer. Compared with the traditional power supply system, the present invention directly converts the mains into a 12V DC voltage, and then converts the DC 12V voltage into other low-voltage DC voltages and various timing signals required by the computer. In addition, during the power supply period of the present invention, the output voltage of the power supply is provided to the input of the secondary DC power supply after voltage stabilization, minus the inverter circuit, greatly reducing the volume of the power supply and improving the conversion efficiency of the power supply.

[0019] Specifically, the AC power passes through the input rectification circuit, the PFC correction circuit, the PWM power conversion circuit, and the synchronous rectification circuit in sequence, so that the output end of the synchronous rectification circuit is a DC 12V voltage. The output end of the synchronous rectification circuit is used to power the mainboard and charge the power supply. The 3.3V DC power at the output end of the first output synchronous rectification circuit is used to power the components of the mainboard. The output end of the second output synchronous rectification circuit is a 5.5V DC power, which is used for standby and powering the switching circuit. When the power supply is charging, the power supply has no output. When the power supply is not charged with AC power, the power supply has an immediate output, and the total output voltage has no delay. In this embodiment, the power supply is a lithium battery.

[0020] In this embodiment, the uninterruptible computer power supply system also includes a fan driving circuit, a temperature sensing circuit and a sixth voltage sampling circuit. The input end of the fan driving circuit is respectively connected to the output end of the synchronous rectification circuit and the output end of the output voltage stabilization and boosting circuit, the temperature sensing circuit is connected to the input end of the sixth voltage sampling circuit, and the output end of the sixth voltage sampling circuit is electrically connected to the fan driving circuit.

[0021] In this embodiment, the uninterruptible computer power supply system further includes a timing output circuit and a PG signal generating circuit. The timing output circuit is connected to the switch circuit, and the PG signal generating circuit is electrically connected to the timing output circuit.

[0022] In the present embodiment, the first output synchronous rectification circuit is respectively connected to a first synchronous rectification circuit driving circuit, a first current sampling circuit and a first voltage sampling circuit. The first synchronous rectification circuit driving circuit is used to drive the first output synchronous rectification circuit. The stability of the output voltage of the first output synchronous rectification circuit is effectively improved through correction by the first current sampling circuit and the first voltage sampling circuit.

[0023] In this embodiment, the second output synchronous rectification circuit is respectively connected to a second synchronous rectification circuit driving circuit, a second current sampling circuit and a second voltage sampling circuit. The second synchronous rectification circuit driving circuit is used to drive the second output synchronous rectification circuit. Correction is performed by the second current sampling circuit and the second voltage sampling circuit, thereby effectively improving the stability of the output voltage of the second output synchronous rectification circuit.

[0024] In this embodiment, the PFC correction circuit is connected to the PFC driving circuit, the third current sampling circuit and the third voltage sampling circuit. The stability of the output voltage of the PFC correction circuit is effectively improved through correction by the third current sampling circuit and the third voltage sampling circuit.

[0025] In this embodiment, the PWM power conversion circuit is connected to a PWM drive circuit, a fourth current sampling circuit and a fourth voltage sampling circuit. The PWM drive circuit is used to drive the PWM power conversion circuit. Correction by the fourth current sampling circuit and the fourth voltage sampling circuit effectively improves the stability of the output voltage of the PWM power conversion circuit.

[0026] In this embodiment, the synchronous rectification circuit is connected to a synchronous rectification circuit driving circuit, a fifth current sampling circuit and a fifth voltage sampling circuit. The synchronous rectification circuit driving circuit is used to drive the synchronous rectification circuit. Correction is performed by the fifth current sampling circuit and the fifth voltage sampling circuit, thereby effectively improving the stability of the output voltage of the synchronous rectification circuit.

[0027] In this embodiment, the power supply is connected to a power indicator circuit, which is used to indicate the working status of the power supply. For example, the power indicator circuit flashes when supplying power and stays on when discharging.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. An uninterruptible computer power supply system, characterized in that: The invention comprises an input rectifier circuit, a PFC correction circuit, a PWM power conversion circuit, a synchronous rectifier circuit, a power supply, a charging circuit, an output voltage stabilizing boost circuit, a first output synchronous rectifier circuit, a second output synchronous rectifier circuit and a switch circuit, wherein the input end of the input rectifier circuit is connected to the mains, the output end of the rectifier circuit is connected to the input end of the PFC correction circuit, the output end of the PFC correction circuit is connected to the input end of the PWM power conversion circuit, the output end of the PWM power conversion circuit is connected to the input end of the synchronous rectifier circuit, the input end of the charging circuit is connected to the output end of the synchronous rectifier circuit, the output end of the charging circuit is electrically connected to the charging end of the power supply, the power supply end of the power supply is connected to the input end of the output voltage stabilizing boost circuit, the input end of the first output synchronous rectifier circuit is respectively connected to the output end of the synchronous rectifier circuit and the output end of the output voltage stabilizing boost circuit, the input end of the second output synchronous rectifier circuit is respectively connected to the output end of the synchronous rectifier circuit and the output end of the output voltage stabilizing boost circuit, and the output end of the second output synchronous rectifier circuit is electrically connected to the switch circuit; The city power passes through the input rectification circuit, PFC correction circuit, PWM power conversion circuit, and synchronous rectification circuit in sequence, so that the output end of the synchronous rectification circuit is a DC 12V voltage. The output end of the synchronous rectification circuit is used to power the mainboard and charge the power supply. The 3.3V DC power at the output end of the first output synchronous rectification circuit is used to power the components of the mainboard. The output end of the second output synchronous rectification circuit is a 5.5V DC power, which is used for standby and powering the switch circuit. When the power supply is charging, the power supply has no output. When the power supply is not charged by the city power, the power supply has an immediate output, and the total output voltage has no delay. During the normal power supply period of the mains, the power supply is charged through the charging circuit. During the power outage period, the power supply provides electricity and is converted into the voltage required by the computer through the output voltage stabilization and boosting circuit to power the computer; the mains is converted into a 12V DC voltage, and then the DC 12V voltage is converted into a low-voltage DC voltage and timing signal required by the computer. During the power supply period of the power supply, the output voltage of the power supply is provided to the input of the secondary DC power supply after voltage stabilization; The uninterruptible computer power supply system further comprises a timing output circuit and a PG signal generating circuit, wherein the timing output circuit is connected to the switch circuit, and the PG signal generating circuit is electrically connected to the timing output circuit; The first output synchronous rectification circuit is respectively connected to a first synchronous rectification circuit driving circuit, a first current sampling circuit and a first voltage sampling circuit; the first synchronous rectification circuit driving circuit is used to drive the first output synchronous rectification circuit, and is corrected by the first current sampling circuit and the first voltage sampling circuit; The second output synchronous rectification circuit is respectively connected to a second synchronous rectification circuit driving circuit, a second current sampling circuit and a second voltage sampling circuit; the second synchronous rectification circuit driving circuit is used to drive the second output synchronous rectification circuit, and is corrected by the second current sampling circuit and the second voltage sampling circuit; The PFC correction circuit is connected to the PFC driving circuit, the third current sampling circuit and the third voltage sampling circuit, and is corrected by the third current sampling circuit and the third voltage sampling circuit; The PWM power conversion circuit is connected to a PWM drive circuit, a fourth current sampling circuit and a fourth voltage sampling circuit; the PWM drive circuit is used to drive the PWM power conversion circuit, and is corrected by the fourth current sampling circuit and the fourth voltage sampling circuit; The synchronous rectification circuit is connected to a synchronous rectification circuit driving circuit, a fifth current sampling circuit and a fifth voltage sampling circuit; The synchronous rectification circuit driving circuit is used to drive the synchronous rectification circuit, which is corrected by the fifth current sampling circuit and the fifth voltage sampling circuit; The uninterruptible computer power supply system also includes a fan driving circuit, a temperature sensing circuit and a sixth voltage sampling circuit. The input end of the fan driving circuit is respectively connected to the output end of the synchronous rectification circuit and the output end of the output voltage stabilization and boosting circuit, the temperature sensing circuit is connected to the input end of the sixth voltage sampling circuit, and the output end of the sixth voltage sampling circuit is electrically connected to the fan driving circuit.

2. The uninterruptible computer power supply system according to claim 1, characterized in that: The power supply is connected to a power indication circuit.

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