KR200201620Y1 - Synthetic power On-line management system of UPS by the microprocessor synthetic control formular - Google Patents

Abstract

The present invention relates to the integrated control by the microprocessor of the uninterruptible power supply, a device for protecting data from power failure and power failure. It fully complements the shortcomings of a line UPS and incorporates the microprocessor's integrated power on-line management into the high cost and frequent error rates caused by the complex circuitry and many components of an on-line UPS. It is a technology that reduces the error occurrence rate and realizes high performance and low price by overcoming the system.

The present invention is designed to output a constant voltage compensated by ± 10% without the battery discharged by the automatic voltage regulation circuit (AutoBOOST-AutoTRIM), by supplying the frequency automatic switching and constant frequency by the microprocessor It is able to supply constant voltage constant frequency (CVCF) which is characteristic of traditional on-line UPS.

In addition, the equal-floating charging is automatically switched by the microprocessor to enable charging in a short time, and the intelligent battery management system is controlled by the microprocessor directly controlling the automatic check circuit of the battery and the automatic variable circuit of the end voltage of the battery. It is a technology that has built an integrated power management system that can transmit and receive data using RS-232PORT.

Description

Synthetic power on-line management system of UPS by the microprocessor synthetic control formular

The present invention relates to the integrated control of the uninterruptible power supply, which is a device for protecting data from power failure and power failure, and fully complements the shortcomings of the off-line UPS by strengthening the function of the microprocessor, which is an essential part of the uninterruptible power supply. It is a technology that enables the integrated automatic power management system to take full advantage of the on-line UPS.

In the technical part of the conventional uninterruptible power supply, the off-line method of operating the inverter only during a power outage and supplying it to the load, and the on-line operating as an inverter at all times by supplying DC power to the charger and the inverter even during normal commercial power supply. In the off-line method, the inverter does not operate normally and rectifies and outputs the KEPCO's power. If the power supply fails or the power failure is released, the inverter output is stopped and the KEPCO power is output. In this Off-line method, the inverter does not operate normally, so the switching time to the inverter mode from the KEPCO state is long.

In addition, in the off-line method, the change in the input voltage is output to the output voltage as it is, and the output frequency is changed according to the change in the input frequency, which reduces the reliability of the power supply and the battery management system is weak because it cannot check the battery status. .

In contrast, in the on-line method, since the input power is output through two conversions while the inverter is alive, the variation of the input power does not affect the output at all, so the reliability of the output power is high but the efficiency is low. The cost was too high because of the design and parts required.

Recently, the line interactive type uninterruptible power supply that has the tradeoff between the off line method and the on-line method has been developed. However, this is an addition of the on-line voltage regulation function to the off-line method. It was.

Therefore, the purpose of the present invention (Synthetic power on-line management system) is to completely solve the disadvantages of the off-line method, and to develop a reliable uninterruptible power supply with a much lower cost for performance while making full use of the advantages of the on-line method. In more detail, power management systems based on existing complex circuits can be digitally enhanced by microprocessors to enable comprehensive inspection and control of equipment, simplify circuit configuration, increase efficiency, and improve traditional on-line. It is to develop high performance low cost uninterruptible power supply with integrated power management system that takes full advantage of the method.

1 is a block diagram of an integrated Synthetic power On-line management system

2 is an input and output circuit diagram for controlling the main power supply

Figure 3 is a circuit diagram controlled by a microprocessor which is a key part of the Synthetic Power On-line management system

4 is a display configuration diagram shown by the microprocessor

<Description of Main Parts of Drawing>

2 (a): AVR circuit diagram

2 (b): Circuit part of charging part (evenly, floating charging circuit diagram)

2 (c): START Selecter Circuit Diagram

2 (d): Inverter module circuit diagram

2 (e): Input and output filter part

3 (a): Circuit diagram of input (voltage, frequency) detector

3 (b): RS-232 DATA communication circuit diagram

3 (c): Output detection part (current) circuit diagram

3 (d): Microprocessor (CPU) Circuit Diagram

3 (e): Circuit diagram of input / output voltage selector

3 (f): Inverter voltage detector circuit diagram

3 (g): AutoBOOST-AutoTRIM Circuit Diagram

The present invention is designed to enable a reliable integrated power management system by modularizing all major components to replace the above-mentioned problems and replacing existing complicated circuit configurations by a microprocessor. Hereinafter, the configuration and effect of the present invention by the accompanying drawings in detail.

Figure 1 shows a block diagram of the synthetic power on-line management system, showing that all signals and control are performed by the AutoBOOST-AutoTRIM circuit and microprocessor. As with the on-line method, the inverter is always active and always prepares for an abnormal state of the input power supply.When an abnormality (interruption or power failure) occurs in the commercial power supply, the inverter receives power from the battery in an uninterrupted state at all times. The microprocessor is a system that supplies sine wave output continuously due to the inverter connected to the microprocessor and simultaneously cuts off unstable input power and continuously supplies high quality AC power until the battery power is exhausted or the commercial power is restored. It shows that it is integrated management. Received signals from each module circuit, the microprocessor can replace complex circuits by controlling and managing the appropriate devices, and are designed for automatic system control. In addition, when the battery is discharged during power outage and the remaining charge can be compensated for 1-2 minutes, the battery low voltage lamp is turned on and the intermittent sound speeds up, and the user's work is quickly stored in the auxiliary memory and the system is safe. The microprocessor automatically controls the battery auto-management system to automatically turn off the UPS to protect the battery from over-discharge when the remaining charge is too low to prevent further power outage. High reliability of the line method is implemented.

2 (a) and 3 (g) show the automatic voltage regulation technology by AutoBOOT and AutoTRIM circuits. When the commercial power is low or high, the automatic voltage regulation circuit (Figure 2 (a)) detects the voltage. In this case, the microprocessor controls the AutoBOOT-AutoTRIM circuit to supply ± 10% compensated output to the load without discharging the battery. In more detail, if the input power of the UPS is higher than 176Vac or lower than 198Vac, the AutoBOOST circuit converts the output voltage to the normal voltage (220 ± 10%) and supplies it to the output load.The input voltage is about 215Vac or higher. Inverter is operated by battery operation to maintain normal voltage. In addition, if the input voltage of UPS is higher than 242Vac and lower than 264Vac, the output voltage is converted to normal voltage (220 ± 10%) by the AutoTRIM circuit and supplied to the output load.When the input voltage is about 225Vac or less, The inverter operates to maintain a normal voltage.

Figures 2 (a) and 2 (b) illustrate an intelligent charging circuit system using a microprocessor, which follows a traditional on-line UPS method that can charge a battery by floating charging and equal charging. Generally, in case of Off-Line UPS or Line interactive UPS, the charging time of the battery is long because only the floating charging method is used. However, the present invention can prevent the shortening of the battery life by continuously charging the battery using the floating charging method. When the battery is discharged, the battery can be fully charged by the equal charging method, and the battery charging time can be shortened so that it can cope with the power failure that may be during long time battery charging. It is done automatically by automatic control. This is a system that limits overcharge according to the current limit value set by the microprocessor, and when the end voltage is reached when the battery is discharged, the battery can be converted to equal charging to charge the battery in a short time.

The circuit of Figure 3 (a) shows that when the input frequency is detected, the microprocessor automatically detects the frequency of 50Hz or 60Hz of commercial power input to the UPS and automatically supplies it to the output power. By supplying constant frequency, it maintains synchronization with power failure after recovery. The conventional uninterruptible power supply outputs the frequency as it is set in the semiconductor chip (IC555), and must be set again when converting the frequency, but the present invention uses the frequency input by the automatic frequency conversion function of the microprocessor (CPU). Supply it to the output load as it is.

When the input / output voltage is manually selected according to FIG. 3 (e), the microprocessor which senses the selected input / output voltage controls the inverter module and various important devices to enable the operation of the equipment without abnormality by selecting various voltages. .

If the load connected to the UPS is overloaded and overload is detected, the overcurrent is detected by Fig. 3 (c), and the detected overcurrent is detected by the microprocessor to turn on the lamp of Fig. 4 (display diagram). An intermittent sound will be heard and will automatically return to normal when the overload is released. In case of short circuit or excessive current of over 300% at the moment, the output is cut off to protect the UPS, the alarm lamp is turned on, and the buzzer sounds continuously to alert the user to take measures.

Another important feature of the present invention is the possibility of intelligent battery management system with microprocessor function. In general, the off-line or line interactive method does not check the state of the battery. The battery management system was established according to the traditional on-line method, and the battery life was extended by introducing new technology by the variable function of the end voltage. After the battery is completely charged by the circuit configuration of FIG. 2 (b), if the battery status signal is transmitted to the microprocessor by checking the state of the battery and the connection line with the battery from time to time, the battery error lamp is turned on in case of a battery failure. In addition, by making a quick intermittent sound to prevent the output cut off due to battery failure in case of power failure. In addition, by the amount of load detected in the circuit of FIG. 3 (c), the microprocessor automatically changes the end voltage of the battery according to the amount of load so that the battery can be used more efficiently and recharged to full discharge after light load and no load discharge. It prevents malfunctions and prolongs battery life.

The third diagram (d) shows a circuit configuration capable of RS 232 DATA communication. The UPS and the computer RS-232 PORT are connected to each other without a separate communication card, and a separate power monitoring software is installed on the computer to transmit and receive the UPS status information.

The Synthetic power On-line management system completely overcomes the limitations of the existing power management system of the off-line UPS, and is caused by the complicated circuit configuration and many components of the on-line UPS. By overcoming high price and frequent error rate by the integrated management system of microprocessor, it is possible to develop breakthrough uninterruptible power supply which reduces the rate of error rate and realizes high performance and low price. As a result, the development of a digital UPS can enhance the reliability of the UPS and provide electricity to completely protect the equipment and data on the Internet, the basis of the information and communication industry, at a reasonable economic cost.

The present invention completely overcomes the low efficiency of the on-line UPS, and is a groundbreaking equipment that completely improves the network and unsuitability for equipment due to the long transfer time which the off-line UPS cannot supply constant voltage and constant frequency. As such, the company is expected to contribute to sales growth and the spread of uninterruptible power supplies with outstanding performance and excellent price competitiveness in the domestic market, which is estimated at 30 billion won per year, and the global market, which is estimated at KRW 2 trillion.

Claims (1)

Automatic charging of the battery charging system (2 (b)) and input frequency through automatic voltage regulation, equalization and floating charging, made by AutoBOOST / AutoTRIM circuit (3 (g)) when commercial power is low or high Function and constant frequency supply (3 (a) degree), noise and surge protection circuit (2 (e) degree) at the input and output terminals, various selection of input / output voltage switch (2 (c) degree, built-in overvoltage protection circuit and overload and Automatic alarm system (3 (c)), battery condition check and intelligent battery management system (2 (b)) by variable end voltage, data communication (3 (b)) using RS-232 PORT A system that enables high-performance, low-cost uninterruptible power supplies by simplifying circuits and components by integrating management and control in a microprocessor (3 (d)).