Device for protecting the computer system from intermittent power failure

 

(57) Abstract:

The invention relates to computer technology, primarily to stationary personal computers (PC). Known PC (domestic EC type-1841, EU-1849, foreign type RS), containing the network rectifier, stable Converter secondary voltages, CPU and external devices. When creating computer networks and the decision of the responsible task of the PC is used in conjunction with expensive stand-alone device, the efficiency of which is low. Prompted to enter directly into the PC component battery, battery, Converter DC voltage and sensor failure network. This greatly reduces the number of stages of energy conversion, respectively, increases efficiency, dramatically reduced the size and cost of the protection device. 2 Il.

The invention relates to computing and can be used to protect personal computers from power failures.

The technical result is to prevent loss of information when failures and network failures.

In Fig. 1 shows a diagram of the device of Fig. 2 is a diagram of a device with an additional step-up Converter pose (secondary voltages 4), the Central processor 5 input 6 interrupt, the peripheral device 7, the sensor 8 failure of the network, battery 9, a node 10 charge and the switch 11.

The device operates as follows.

In the normal operating mode when the mains voltage is within the acceptable range, the separator diode 11 is closed due to the fact that the constant output voltage of the rectifier 1 is greater than the voltage of the battery 9. The power regulator 3 and 7 is rectified mains voltage.

When failure or interruption of the mains voltage 2 output voltage of the rectifier 1 is reduced, opens the switch 11, and the power regulator 3 and the device 7 is supplied from the battery. Simultaneously, the sensor 8 sends a signal failure of the network to the input 6 interrupt processor 5. On this signal the PC can perform some additional operations (for example, an audible alarm switch to battery power, automatic overwriting information in a magnetic external device, etc). The node 10 charge is automatically activated when the voltage decrease of the battery 9 to the boundary values.

The device in Fig. 1 has a drawback. Usually when transformerless wypr the e battery required batteries 9 voltage 270 - 290, i.e., a serial connection of more than 220 standard battery voltage 1,2 Century Such batteries is feasible, but the roads and unreliable.

Therefore, in most cases, when transformerless straightening network more convenient scheme of Fig. 2, in which in order to eliminate this drawback introduced increasing Converter 12, an input connected to the output of the battery, and the output via an isolating diode 11 with the power input stabilizer 3 and devices 7. In this case, you can use the standard battery voltage 12-24 V, more reliable and less expensive. To prevent battery discharge at a nominal voltage Converter 12 is switched on only when its control input signal from the sensor 8 failure of the network connection between the output of the sensor 8 and the controlling input of the Converter is optional, but it improves battery usage). The node 10 charge for simplification connected to one of the output voltages 4 (this became possible due to the use of low-voltage battery).

As far as we know, a stationary PC, protected from failure, and power failure are not available neither in Russia nor abroad. Indirectly, this svidetelstvo sequence of energy conversion and reduced the number of stages of conversion in comparison with the known PC, fed using Autonomous redundant systems.

The benefits of the proposal. Software PC continuous flow of energy without any interruption provide UPS systems. This is achieved due to the fact that the switching time of the diode 11 is measured in fractions of microseconds and several orders of magnitude less than the delay power failure due to the capacitor of the rectifier 1 and the stabilizer 3.

A significant simplification. UPS system-PC contains five or six steps of energy conversion (net 50 Hz - DC voltage - sinusoidal output voltage UPS - DC voltage 310 To - AC voltage Converter 50 - 500 kHz - rectified stabilized voltage).

Increase efficiency. In the prototype energy network and battery is lost at all stages of transformation, especially when generating a sinusoidal output voltage of the UPS. So, for THE BPS-113 efficiency = 60%, and taking into account the efficiency of the power supply PC shared channel coefficient less than 50%. For SSG 400 from a company catalogue efficiency = 75%. In our case, the efficiency for the device of Fig. 1 is determined only by the losses of the diode 11 and the charger 10 and equal to 95-98%, and Fig. 2 - more than 90%.

Sharply uluchshenie mass PC with a 200-watt power supply for the circuit of Fig. 2 does not exceed 2-3 kg, compared with the prototype under warranty 15 minutes of operation after power failure. Necessary to continue the work of the external device or must have their own system of protection against power failure, or as provided in the diagrams of Fig. 1 and 2, must be powered from redundant output voltage of the rectifier 1.

DEVICE FOR protecting the computer system FROM INTERMITTENT POWER FAILURE, containing the rectifier voltage, a voltage regulator whose outputs are the outputs of the device to connect to the power input of the Central processor computing system, and the inputs and outputs of the voltage rectifier are connected to terminals of the AC voltage and the input voltage, respectively, characterized in that it further comprises a battery, a node of the charge, the Converter DC voltage, switch and sensor failure network, and terminals of the battery are connected to the outputs of the circuit of charge and through the Converter - input switch, a control input connected to the output of the sensor failure network and access devices to connect to the interrupt input of the CPU in the outputs of the switch are connected to the outputs of the rectifier voltage and are the outputs of the device to connect to the power input of the peripheral devices of computer system.

 

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