KR101148682B1 - Non-battery type ups for data backup - Google Patents

Abstract

The present invention relates to a power supply that maintains power to protect important devices such as computers in the event of a power problem. More specifically, when the current input through the EMI filter unit is a normal signal in the line switching switching unit, The power is sent to the outside and part of the commercial power is bypassed on the line switching switch to charge the charging unit. When an abnormal signal such as a power failure, the voltage charged to the charging unit supplies power to the load through the line switching switching unit. In the uninterruptible power supply for battery-less data backup, it is possible to continuously supply commercial power to devices such as computers connected to the output terminal to ensure time to process procedures such as data backup by appropriate measures. It is about.

Description

Non-battery type uninterruptible power supply for data backup {Non-battery type ups for data backup}

The present invention relates to a power supply that maintains power to protect important devices such as computers in the event of a power problem. More specifically, when the current input through the EMI filter unit is a normal signal in the line switching switching unit, At the same time, the power is sent to the outside and part of the commercial power is bypassed on the line switching switching unit to charge the charging unit. When an abnormal signal such as a power failure, the current is induced to the load in the line switching switching and the current charged to the charging unit It is possible to guarantee the time to process the procedure such as backup of the data by appropriate measures by supplying commercial power continuously to the equipment such as the computer connected to the output by returning to the line switching switching unit. It relates to a battery type uninterruptible power supply.

The present invention protects important devices such as computers in the event of unexpected power problems such as power outages or overvoltages, and maintains the power supply so that appropriate actions (data backup, power off by procedure) can be informed to the operator of the current situation. The present invention relates to a batteryless uninterruptible power supply for data backup.

In the past, when an unexpected power failure occurs, such as a power failure during computer work, the data during work must be deleted and reworked.If over current flows, the computer's power supply or internal components may have a problem and need to be repaired or replaced. The problem occurred.

The UPS, which is an uninterruptible device, has been recently developed in a microcomputer to provide stable electricity even in the event of a power failure.

The UPS is a device that rectifies AC electricity and stores it in a battery when electricity is normally supplied, and converts electricity charged in the battery into AC electricity such as household electricity through an inverter during power failure. Is changed, and the holding time is determined by the battery capacity.

Therefore, existing UPS requires a battery for power storage purposes.

However, because batteries are limited in size and capacity, a supercapacitor, which focuses on the performance of electronic circuits and capacitors, in particular, has been emerging as a component used for battery purposes.

A supercapacitor is a component that uses the purpose of a battery, and a capacitor used in an electronic circuit has the same function as an electrically charged battery, and is one of the necessary components for stable operation of the electronic circuit.

It operates stably even after a long time in an environment where charging and discharging are repeated.

It is usually used for the purpose of supplying small power when the power is cut off after being charged from AC power, and is used for safety devices that temporarily supply power to the setting memory or operate during power failure.

Note that UPS is an abbreviation for Uninterruptible Power System and should not be confused with the UPS as a power supply.

The present invention relates to a power supply that maintains power to protect important devices such as computers in the event of a power problem, in particular, it can provide a stable electricity even in the event of a power failure by using a supercapacitor that does not require a battery. In addition, since it can be manufactured in a light weight and small size, it can also be configured inside the power strip to protect a plurality of devices that are supplied with power through the power tap at the same time.

The present invention provides an uninterruptible power supply that maintains power to protect important devices such as a computer in the event of a power problem. The EMI filter blocks noise from incoming power and noise generated during internal switching of the device. Wealth;

A line switching switching unit which detects a state of the power passed through the EMI filter unit and induces the supply to the outside of the commercial power supply only when the power is normal;

In addition to the output to the outside through the output stage in the normal signal of the line switching switching unit, commercial power is charged to the emergency power through the bypass (bypass), the emergency power charged in the abnormal signal is guided by the line switching switching unit to the output stage A charging unit which is output through the outside;

A control and signal processor for controlling a series of processes of the charging unit;

A power supply unit receiving power from the charging unit and supplying power to the control and signal processing unit;

An AC waveform detection unit configured between the EMI filter unit and the line switching switching unit to detect a current state of a power supply and to send a result to a control and signal processing unit;

It is characterized by consisting of.

The uninterruptible power supply of the present invention having the above-described configuration is to enhance the performance of the capacitance of the capacitor performance can be produced in a lightweight because no battery, such as a UPS, and also can be produced in a light weight and small size, so the inside of the power strip It can be applied to various places such as to install it.

In particular, when installed inside the power strip, a plurality of devices connected to the power strip as a power supply can be protected at the same time.

1 is a system configuration diagram of an uninterruptible power supply of the present invention.
2 is a circuit diagram of an AC waveform detection unit of the uninterruptible power supply of the present invention.
3 is a schematic diagram showing a process of generating a reference waveform by the control and signal processing unit of the uninterruptible power supply of the present invention.
Figure 4 is a circuit diagram of the line switching switching unit of the uninterruptible power supply of the present invention.
5 is a circuit diagram of a power supply unit of the uninterruptible power supply of the present invention.
Figure 6 is a circuit diagram of the DC / DC boost converter of the uninterruptible power supply of the present invention.
7 is a circuit diagram of a DC / DC voltage reduction converter of the uninterruptible power supply of the present invention.
8 is a circuit diagram of a DC / AC converter of the uninterruptible power supply of the present invention.
9 is a circuit diagram of a line filter unit of an uninterruptible power supply of the present invention.
10 is an embodiment in which a power supply device is configured inside a power strip.

Hereinafter, the battery-less uninterruptible power supply for data backup of the present invention will be described in detail with reference to the accompanying drawings.

1 is a system configuration diagram of a power supply apparatus of the present invention.

As shown in FIG. 1, the uninterruptible power supply 100 of the present invention includes an EMI filter unit 110 that blocks external noise from noise introduced from an input power source and noise generated during an internal switching operation of the device. And, the line switching switching unit for identifying the state of the power passed through the EMI filter unit 110 to induce a commercial power supply when the power is normal, when the charged voltage to the charging unit 130 is supplied to the load is abnormal 120 and the commercial power is charged to the emergency power through the bypass along with the output to the outside during the normal signal of the line switching switching unit 120, the emergency power charged in the abnormal signal is the line switching switching unit The control unit 130 is output to the outside through the output terminal of the 120, the control and signal processing unit 140 for controlling a series of processes of the charging unit 130 and the control by receiving power from the charging unit 130 And A power supply unit 150 for supplying power to the signal processing unit 140, and between the EMI filter 110 and the line switching switching unit 120 detects the current state of the power supply to control and signal processing It is composed of an AC waveform detection unit 160 that sends a result to (140).

And the charging unit 130 is configured as a direct bypass (bypass) to operate when the normal signal of the line switching switching unit 120 (current detection unit 131 for detecting whether the current supplied within the allowable limit, and the current detection unit 131 A line filter unit 132 for filtering the current passing through), a DC / AC converter 133 for converting the AC power filtered by the line filter unit 132 into DC, and the DC / AC converter ( The charging path C for charging the DC / DC decompression converter 135 for decompressing the voltage converted into DC at 133 and the DC voltage decompressed in the DC / DC decompression converter 135 with the supercapacitor 136 (C). )Wow;

A DC / DC boost converter 134 for boosting a DC voltage charged in the supercapacitor 136 by operating at an abnormal signal of the line switching switching unit 120, and boosts the DC / DC boost converter 134. A DC / AC converter 133 for converting the converted DC voltage into an AC voltage, a line filter 132 for filtering the voltage converted into AC by the DC / AC converter 133, and a line filter 132 In order to be output to the outside (load) through the output terminal of the current detection unit 131 and the current detection unit 131 to detect the current filtered through the current detection unit 131 and the line switching switching unit 120 It has a return path (D) to return to the line switching switching unit 120.

The charge path C stands for Charge and the discharge path D stands for Discharge.

Thus, the flow of power and the function of each component according to the above configuration is as follows.

First, the EMI filter unit 110, in which AC 220V / 60Hz power is supplied through an input terminal, blocks noise flowing from the supplied power and does not output switching noise generated inside the device.

In addition, the power passing through the EMI filter unit 110 passes through the line switching switching unit 120.

At this time, the AC waveform detection unit 160 is configured between the EMI filter unit 110 and the line switching switching unit 120 to detect the current power supply state and to control and signal processing unit 140 to be described later. Will be sent.

In FIG. 1, a thick arrow indicates a flow of control signals relatively to the flow of power.

2 is a circuit diagram of an AC waveform detection unit of the power supply apparatus of the present invention.

The AC wave detection unit 160 is designed as an amplifier and a filter configured as an operational amplifier (OP-AMP), and reduces the 220V AC voltage to 1/100 to an analog-to-digital converter in the control and signal processing unit 140 (Analog to Digital). This is a circuit for transmitting a signal to a converter.

In this case, a protection circuit for protecting the input of the analog-digital converter is included.

First, a reference waveform is generated to detect an abnormal power supply, which analyzes a signal passing through the AC waveform detector 160 in an analog-to-digital converter in the control and signal processor 140 to analyze maximum and minimum values and frequency information. Acquire.

Using this information, it sets the steady-state range including the allowable range (eg ± 10%) set by the user from the reference wave having the same characteristics as the power supply, and when the measured signal deviates from it, an error occurs in the power supply state. Recognize.

In particular, the AC waveform detection unit 160 alerts the user by generating a warning sound when the state of the input power is detected as an abnormal state, and informs the user to perform a work in progress or backup of important data.

Device configuration, such as warning light or buzzer for generating a warning sound is generally a configuration of the state commonly used, and thus are not shown in detail in the drawings.

3 is a schematic diagram illustrating a process of generating a reference waveform by the control and signal processor of the power supply apparatus of the present invention.

As shown in FIG. 3, the process of generating the reference waveform by the control and signal processing unit will be described below.

Step 0] As a preparation step, the highest and lowest values are measured from the input signal waveform.

At this time, a software filter is additionally applied to suppress noise.

The reference value (zero point or less below the central value) is calculated using the obtained highest and lowest values.

Step 1] Compare the measured signal with the zero point to find when the measured signal is zero.

Step 2] Compare the measured signal with the highest value to find when the measured signal is the highest value.

Step 3] Compare the measured signal with the lowest value to find when the measured signal is the lowest value.

Step 4] Repeat Steps 1 to 3 five times.

Repeatedly obtain the average of the highest, lowest and frequency values.

At this time, the frequency calculation is calculated by measuring the time from the first 0 point to the next 0 point.

4 is a circuit diagram of a line switching switching unit of the power supply apparatus of the present invention.

The circuit diagram of the line switching switching unit illustrated in FIG. 4 is a circuit diagram which can be sufficiently designed with a certain level of knowledge in the field to which the present invention pertains, and is generally used.

The line switching switching unit 120 transfers the commercial power when the power is in a normal state and the voltage charged in the charging unit 130 to the line telephone switching unit 120 when the power is in an abnormal state, and transmits the load to the load (external) through the output terminal. It controls the switch as much as possible.

That is, when the power is in a normal state, the commercial power is immediately supplied to the outside through the output terminal, and when the abnormal signal is supplied, the commercial power is supplied to the outside through the output terminal by receiving a voltage from the charging unit 130.

In addition, the commercial power is also charged in the form of DC power to the supercapacitor 136 configured in the charging unit 130 through the bypass (bypass) is configured in the line switching switching unit 120.

The power charged to the supercapacitor 136 is DC 24V.

The DC 24V power charged in the supercapacitor 136 is converted into DC 5V and DC 3.3V to drive the control and signal processing unit 140 through the power supply unit 150.

5 is a circuit diagram of a power supply unit of the power supply apparatus of the present invention, wherein the power supply unit 150 is configured using a regulator IC and a smoothing filter.

At this time, when the power to the line switching switching unit 120 is abnormal, at the same time the DC power charged in the supercapacitor 136 is output to the outside through the line switching switching unit 120.

The DC power of the supercapacitor 136 is converted to AC power and output to the outside through the line switching unit 120 as follows.

6 is a circuit diagram of a DC / DC boost converter of the power supply apparatus of the present invention.

The DC power charged in the supercapacitor 136 is boosted to DC 350V from the DC / DC boost converter 134 configured in the form of a push-pull converter as configured in the circuit diagram of FIG. 6 to the DC / AC converter 133 which will be described later. Will be supplied.

8 is a circuit diagram of a DC / AC converter of the power supply apparatus of the present invention.

As shown in FIG. 8, the DC / AC converter 133 converts a DC voltage of 350V into an AC voltage of 220Vrms in an inverter circuit using an IGBT.

Four PWM signals generated by the control and signal processing unit 140 are transmitted to the IGBT driver to drive each IGBT, and configure a full bridge inverter circuit.

The output at this time is generated between LOAD_P and LOAD_N in FIG. 7, and an AC waveform in the form of a square wave is generated.

9 is a circuit diagram of a line filter unit of the power supply apparatus of the present invention.

As shown in FIG. 9, the line filter unit 132 filters the square wave of the output terminal into a sinusoidal waveform by applying a filter circuit using L-C.

Finally, the AC power converted into the sinusoidal waveform is output to the outside through the line switching switching unit 120 and is always monitored whether or not the normal operation state in the current detector 131.

As described above, the flow of power from the supercapacitor 136 of the charging unit 130 to the line switching switching unit 120 is referred to as the discharge path D, and the super switching unit 130 of the charging unit 130 is superimposed on the line switching switching unit 120. The flow of power to the capacitor 136 is called the charging path (C).

In the present application, the discharge path (D) has been described first for convenience of description.

The charging path C is a reverse circulation of the discharge path D. The DC / AC conversion unit 133 and the line filter unit 132 perform reverse conversion of a function in which the DC power described in the discharge path D is converted into AC power. Will be.

However, since the power input through the input terminal of the EMI filter unit 110 is a voltage of AC 220V and the supercapacitor 136 is charged at a voltage of DC 24V, the discharge path D is used to reduce the DC power. Instead of the DC / DC boost converter 134, the DC power converted by the DC / AC converter 133 is decompressed by the DC / DC decompression converter 135 to be decompressed to DC 24V to charge the supercapacitor 136. Will be.

7 is a circuit diagram of a DC / DC voltage reduction converter of the power supply apparatus of the present invention.

A circuit for charging the supercapacitor 136. In the present invention, when the inverter circuit is inoperable, that is, when the power supply is in a normal state, the DC power is reduced to charge the supercapacitor 136.

Most IGBT modules have a diode built in parallel to the switching unit for device protection. In the present invention, a diode built in the IGBT is used as a rectifier without additional rectifying circuit.

This is the same structure as the full-wave inverter structure in which the IGBT is connected to the full-wave rectifier circuit when the IGBT is inactive, and a DC voltage proportional to the AC power at the input terminal is obtained.

For example, in a 220V AC power supply circuit, a DC voltage of about 312V is generated.

This voltage is reduced by the charging voltage of the supercapacitor 136 using a pressure reduction converter.

In the present invention, the switch IC (S1) and a high frequency transformer.

FIG. 10 is an embodiment in which a power supply device is configured inside a power strip. FIG.

FIG. 10 may configure the uninterruptible power supply having the above-described configuration on the power input side of the power strip 200 to simultaneously protect a plurality of computers that are connected to the power strip and are supplied with electricity.

That is, the power strip 200 is formed so that a plurality of plugs can be inserted into an outlet having a body structure, and connects a plug to the power strip 200 to supply electric and electronic products such as a plurality of computers that are driven and supplied with power. I can protect it.

In general, an office or a laboratory may be useful because several computers are driven in one multi-tap 200.

100. Uninterruptible Power Supply 200. Multi-tap
110. EM filter unit 120. Line switching switching unit 130. Charging unit
140. Control and Signal Processing Unit 150. Power Supply Unit 160. AC Waveform Detection Unit
131. Current detector 132. Line filter unit 133. DC / AC converter
134. DC / DC boost converter 135. DC / DC boost converter 136. Supercapacitor

Claims (4)

In the uninterruptible power supply that maintains power to protect important devices such as computers in the event of a power problem,
The uninterruptible power supply 100 is configured on the power input side of the power strip 200 so that the noise and the device introduced from the power input to be connected to the power strip 200 to protect a plurality of computers that are powered and operated at the same time EMI filter unit 110 to block the noise generated during the internal switching operation of the;
A line switching switching unit 120 which detects a state of the power passed through the EMI filter unit 110 and induces the supply to the outside of the commercial power (load) only when the power is normal;
When the normal signal of the line switching switching unit 120 is output to the outside through the output terminal, the commercial power is charged to the emergency power through the bypass (bypass), the emergency power charged in the abnormal signal is switched to the line switching unit 120 Induced by the current output unit 131, the line filter unit 132, the DC / AC converter 133, the DC / DC step-up converter 134, DC / DC step-down converter A charging unit 130 including a 135 and a supercapacitor 136;
A control and signal processor 140 for controlling a series of processes of the charging unit 130;
A power supply unit 150 receiving power from the charging unit 130 and supplying power to the control and signal processing unit 140;
An AC waveform detector (160) configured between the EMI filter (EMI) 110 and the line switching switching unit 120 to detect a current state of the power supply and to send a result to the control and signal processor 140;
Characterized in that consisting of,
The charging unit 130 is configured as a direct bypass to operate in the normal signal of the line switching switching unit 120, the current detection unit 131 for detecting whether the current within the allowable limit and the current detection unit 131 A line filter unit 132 for filtering the current passing through the filter, a DC / AC converter 133 for converting AC power filtered by the line filter unit 132 into DC, and the DC / AC converter 133 DC / DC decompression conversion unit 135 for decompressing the voltage converted into DC in the) and the charging path (C) for charging the DC power reduced in the DC / DC decompression conversion unit 135 with the supercapacitor 136 Wow;
A DC / DC boost converter 134 for boosting a DC voltage charged in the supercapacitor 136 by operating at an abnormal signal of the line switching switching unit 120, and boosts the DC / DC boost converter 134. A DC / AC converter 133 for converting the converted DC voltage into an AC voltage, a line filter 132 for filtering the power converted into AC by the DC / AC converter 133, and a line filter 132 Discharge path for returning to the line switching switching unit 120 to output the current detector 131 and the power passing through the current detector 131 to the outside. (D);
Battery-free uninterruptible power supply for data backup characterized by having a.
delete delete The method of claim 1,
The AC waveform detection unit 160 generates an uninterruptible power supply for data backup, characterized in that to generate a warning sound when the state of the input power is detected as abnormal.

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