RU53513U1 - UNINTERRUPTIBLE POWER SUPPLY FOR COMPUTERS AND COMPUTER SYSTEMS - Google Patents

Abstract

The utility model relates to the field of electrical engineering and can be used to power computers and systems based on them, a feature of which is the use of transformerless rectifiers in power supplies at the input and protection against leakage of confidential information is necessary. The AC mains voltage is converted to an undistorted sinusoidal AC voltage through a galvanic isolation unit - a synchronous machine that combines in one housing an electric motor and an electric generator without a brush-collector assembly, the windings of which are located on a combined stator and are excited by a common rotor winding, which is converted into a constant voltage current using an uncontrolled rectifier. This voltage directly feed the computer and systems based on them. At the same time, an electric energy storage device is constantly charged with this voltage. In the event of disappearance or malfunction in the mains voltage, the computer and systems based on them are powered directly by the drive's DC voltage. Galvanic isolation of AC and DC circuits preserves confidential information of a computer and systems based on them, the converter and voltage regulator are excluded due to the stable operation of an uncontrolled rectifier when an uninterrupted sinusoidal shape is supplied from the galvanic isolation unit of AC voltage.

Description

The utility model relates to the field of electrical engineering and can be used to power computers and systems based on them, a feature of which is the use of transformerless rectifiers in power supplies at the input and protection against leakage of confidential information is necessary.

It is known to convert the AC mains voltage to AC voltage before applying it to the input of the rectifier, while providing electrical isolation of the power supply circuit with a constant voltage and the input electric network to filter out interference, which implicitly protects against leakage of confidential information. [one]

Currently, mainly two types of technical devices for power supply of computers and systems based on them are used. In the devices of the first type, the power of computers or computer systems is carried out in normal mode from the network with AC voltage directly or by converting it first to DC voltage and then converting it to AC voltage. When the mains voltage deviates from the normal mode, uninterrupted power supply is carried out from the batteries, but converting by

inverter DC voltage to AC voltage. This type of device is implemented in uninterruptible power systems such as off-line or on-line, respectively, produced by the companies APC, Best, Power, Emerson Electric, etc. [2, 3].

Converting AC power to DC and then direct to AC to power computers and computer systems does not exclude power interruptions when switching AC power to the inverter, it is possible to supply distorted sinusoidal AC power to the inverter and computer, there is no protection against confidential leakage computer information and computer systems, the transmission of which is possible by galvanic connection of sections of AC and DC circuits.

The second type of technical devices [4] for providing computers and computer systems with uninterrupted power, which is adopted as a prototype, provides DC voltage, moreover, in normal mode, immediately after converting the AC voltage to DC voltage, and when the network voltage deviates from normal mode - directly from the DC energy storage device (electrolytic capacitors, molecular storage devices, batteries). In addition, before applying power to computers, it is converted and stabilized to compensate for the instability of the external network. The implementation of the power supply in this device eliminates the double conversion of electricity, improves the quality of the supplied

voltage, the inverter eliminates, but it is possible to supply a distorted sinusoidal shape to the AC rectifier from the network, which requires the use of a complex rectification circuit, and there is no protection against leakage of confidential information of the computer and computer systems due to their galvanic connection with the network.

The task of the technical solution is to create a device providing uninterrupted and high-quality power to computers and computer systems with protection against leakage of confidential information.

The problem is solved as follows. In the known method of uninterrupted power supply to computers and computer systems, in which the AC voltage is converted to DC voltage through a rectifier directly connected to the network, thereby creating leakage paths of confidential information, the characteristics of which depend on the sinusoidality of the voltage curve of the network, according to the claimed utility model power supply of computers and computer systems, a feature of which is the use in power supplies at the input of the best ansformatornyh rectifier, the DC voltage is performed, and in the normal mode - after first converting the AC voltage into the AC unit by electrical isolation and subsequent transformation into a DC voltage, and when the mains voltage deviation is powered directly from the DC drive.

The inventive utility model differs from the prototype in that, in normal mode, computers and computer systems are supplied with direct current from an uncontrolled rectifier connected to a three-phase AC voltage from a galvanic isolation unit powered by a network, which is a three-phase electric synchronous machine that combines in one unit an electric motor and an electric generator, the windings of which are located on a combined stator and are excited by the winding of a common rotor [5]. The advantage of this machine compared to the well-known single-anchor inverters-umformers [6] is its high load and overload capabilities, the absence of a brush-collector assembly, high efficiency, low operating costs, etc. Energy is transferred from the electric motor to the electric generator with high efficiency through a single magnetic field without electromechanical converters, providing a three-phase voltage of an undistorted sinusoidal shape at the input to the rectifier. The DC circuit for computers and computer systems is electrically isolated by this galvanic isolation unit from the network, which protects computers from leakage of confidential information and protects them from all kinds of disturbances in the input network, with the exception of additional devices for improving the quality of electricity - converters and voltage stabilizers used in prototype, due to the supply to an uncontrolled rectifier voltage undistorted sinusoidal shape, providing stable operation with rectifiers ator.

The implementation of the power supply of computers and computer systems with a DC voltage from an uncontrolled rectifier receiving AC voltage from a combined synchronous electric machine connected to an external network, according to the claimed method is industrially applicable.

Power supply to computers and computer systems with deviations of the mains voltage from normal is carried out directly from the energy storage device without interruptions in power supply.

Figure 1 shows a block diagram that implements a utility model. The block diagram contains a galvanic isolation unit 1, to the output of which an uncontrolled rectifier 2, a direct current energy storage device 3, and a consumer 4 (computer or computer system) are connected in series. Depending on the duration of possible interruptions, either storage batteries or molecular storage devices can be used as a DC energy storage device.

The device is implemented as follows: the mains voltage is converted by means of a galvanic isolation unit 1 into an AC voltage of an undistorted sinusoidal shape, rectified by an uncontrolled rectifier 2 into a stable DC voltage of 300-310 V, which is fed directly to computer 4 or computer system 4. This direct current voltage simultaneously charges the DC energy storage device 3, which maintains a constant voltage within the required limits. upon disappearance

mains voltage, providing a constant and reliable power supply to the computer 4. To protect against leakage of confidential information, computers organize by means of unit 1 the interaction of sections of AC and DC electric circuits without direct contact - without their galvanic connection.

Sources taken into account

1. Mkrtchyan J.A. Fundamentals of building computer power devices. Moscow: Radio and Communications, 1990

2. Exide Electronics: “Exide Electronics Corporation Uninterruptible Power Supplies.” Prospectus of the company, 1998.

4. Exide Electronics: “PC MAGAZINE / RE Uninterruptible Power Supplies. Special Issue, January 1997, p. 68-97. WORLD UPS. WORLD PC, March 1997, p. 33-57. Briefing of manufacturers of uninterruptible power supplies. A computer. October 1997, p.212-230

4. Patent R 2242833 C1 C. 7 H 02 J 9/04, published. 2004. Bull. Number 35

5. RWE Piller GmbH: PILLER UNIBLOK-R. Dynamic uninterruptible power supply and power conditioning device. Company Prospectus, 2002.

6. Kopylov I.P. Electric cars. Moscow: Logos, 2000.

Claims (1)

An uninterruptible power supply device for computers or computer systems containing a rectifier, characterized in that it further introduces a combined synchronous electric machine connected to the mains and supplying an undistorted sinusoidal AC voltage to an uncontrolled rectifier, the DC voltage of which before applying it to a computer, computer a system or device that uses a transformerless rectifier in the power supply does not convert or stabilize.