KR100275879B1 - Control device of charger - Google Patents

Abstract

PURPOSE: An apparatus for controlling a charger is provided to enable the charge of a storage battery and stable output of power while selecting between an automatic mode and a manual mode. CONSTITUTION: Diodes(D11-D1n) of a voltage step-down block(40) controls the degree of step down of voltage through selective power-on of magnet switches(MS11-MS1n) to supply a rated voltage to a number of loads(LOAD11-13) through NFBs(41-41b). An internal controller(50) receives an AC power from the first side of a main transformer(32), and controls an SCR bridge(35) to monitor the internal state while controlling the internal operation. A front controller(60) is connected with the internal controller(50) to switch data, and inform the internal operation to a user while receiving a selection signal of the user.

Description

Charger controller

The present invention relates to a control device for a charger, and in particular, a lead-acid battery while arbitrarily selecting an automatic mode in which floating operation and equal operation are automatically switched according to the voltage of a battery, and a manual mode that is switched to an equal operation by a user's reserved time. It also relates to the controller of the charger that enables stable charging as well as 125V load power.

Generally, a charger is used to charge a plurality of batteries in a floating and equalizing manner at ambient temperatures of -25˚C or higher and 40˚C or lower. In addition, when power is applied again after power failure, it should be performed evenly, and after charging, it should be converted to floating operation again.

In addition, the floating charge voltage is 2.17V to 2.18V per one battery, and 130V to 131V is required to charge 60 batteries, and the uniform charge voltage is 2.25V to 2.30V per one battery to charge 60 batteries. When the voltage of 135 ~ 138V is required.

Therefore, in the prior art, the three phase AC 380V drops in voltage on the transformer and is changed to the rated voltage of DC while passing through the SCR bridge so that the phase is controlled while controlling the gate of the SCR bridge.

However, according to the control device of the conventional charger as described above, the manual movement time by the floating operation and the equal operation and the timer must be selected and adjusted as a switch, as well as the voltage value according to the manual operation by the floating operation and the equal operation and the timer. Since it had to be adjusted through the variable resistor, the skilled person could not operate the charger, and even the skilled technician had to check and adjust the operation method while checking the charged and discharged state of the battery from time to time.

Therefore, as shown in FIG. 1, a three-phase voltage of AC 380V is applied to the primary side of the main transformer 2 via the no-fuse breaker (NFB) 1,

On the secondary side of the main transformer (2), the SCR bridge (5) consisting of six SCRs via the surge removing TNR element (3) and the fuse (4) so as to be a proper DC power supply,

The DC power from the SCR bridge 5 is applied to the plurality of battery terminals through the flat choke coil 6 and the NFB 7 and then through the NFB 8 again.

The voltage drop section 10 in which the plurality of diodes D1 to Dn and the magnet switches MS1 to MSn in the NFB 7 selectively turn on the magnet switches MS1 to MSn by the controller 9. Through NFB (11) (11a) (11b) at the rated voltage of DC 125V, respectively, to be simultaneously supplied to multiple loads (LOAD1) to (LOAD3), respectively.

An AC voltmeter 13 is connected to the secondary side of the voltage transformer 12 in which the three-phase AC 380V is connected to the primary side to measure an input voltage.

The strength of the current supplied by connecting the ammeters 14 and 15 between the SCR bridge 5 and the NFB 7 and between the two NFBs 7 and 8 and the state of charge / discharge of the battery are known. So that

Both ends of the NFB (1) (7) (8) (11) (11a) and 11b are connected to the alarm sensors ALS1 which recognizes their trip state in parallel, respectively, to protect the SCR bridge 5. Both ends of the fuse 4 are connected with an alarm sensor ALS2 that recognizes a short circuit.

In the DC power supply unit 17 which receives various types of AC power from the primary side of the main transformer 2 again via the transformer 16 and converts it into a DC power of a rated value, an equal operation switch (EQUAL) and an equalization timer of the user. Receive optional input according to operation switch (EQTM), floating operation switch (FLOAT), timer setting switch (TM),

The auxiliary CPU 18, which directly receives the up / down value by the user while receiving the option and the voltage value according to the operation method from the DC power supply unit 17, outputs the corresponding signal to the CUP 19. and,

In the phase control unit 20 which receives a variable resistance value for the operation control from the CPU 19, the SCR of the SCR bridge 5 connected to the AC power of the R phase, the S phase, and the T phase through the transformer 21 By controlling the pulse signal applied to the gate of (SCR1) (SCR2) (SCR3)) to adjust the power supplied to the battery terminal,

While the DC power alarm amplifier 22 receives the DC power from the DC power supply 17, outputs a signal according to the state of the DC power,

The AC power alarm amplifier 23 receiving the AC power from the transformer 21 outputs a signal according to the state of the AC power,

Signal according to the state of the DC power from the DC power alarm amplifier 22, the AC power alarm amplifier 23, the DC power supply 17, and the alarm sensors ALS1 and ALS2, the state of the AC power Signal according to ground, signal according to grounding of positive and negative DC power lines, signal and fuse according to trip of NFB (1) (7) (8) (11) (11a) 11b The alarm control unit 24 receives the signals according to the connection of the lamp test switch SW1 and the signal corresponding to the connection of the buzzer stop switch SW2 from the switch unit while receiving the signals according to the short circuit of 4). NFB trip display lamp (L1), fuse short circuit display lamp (L2), DC power supply high status indicator (L3), DC power supply low status indicator (L4), both Lamp display unit 26 having a ground fault indication lamp L5 of a positive DC power supply, a ground fault indication lamp L6 of a negative DC power supply, and a low state indication lamp L7 of an AC input power source. ) Lights Ron, NFB trip display alarm (AL1), fuse short circuit display alarm (AL2), DC power high status alarm (AL3), DC power low status alarm (AL4), positive (+ Of the alarm driver 27 having a ground fault alarm (AL5) of the DC power supply, a ground fault alarm (AL6) of the negative DC power supply, and an alarm (AL7) indicating the low state of the AC input power source. We proposed a phase control circuit for the charger to control the operation and inform the user of the operating status.

However, because the phase control circuit of the conventional charger as described above is composed of analog, the internal configuration is complicated, and the manual movement time by the floating operation, the equal operation and the timer must be selected and adjusted manually as a switch, as well as the floating operation. It is troublesome to adjust the voltage value according to the time and equal operation and manual operation by timer, and it is impossible to adjust the speed arbitrarily during voltage adjustment, remote operation is impossible, and check the charged state and discharged state of the battery from time to time. There were disadvantages such as having to adjust the selection.

Accordingly, an object of the present invention is to provide a control device for a charger such that a floating or even driving method is automatically switched in accordance with the setting of an input voltage, a charge / discharge voltage of a capacitor, and a reservation time.

In addition, another object of the present invention is to set a voltage according to a channel of an output voltage and to automatically adjust the voltage using the same.

In order to achieve the above object, the present invention is applied to 60 DC 2V battery terminals by changing the DC voltage of the three phase AC 380V to the appropriate DC voltage during the voltage drop by the main transformer and through the SNR bridge via the TNR element and fuse. At the same time, a plurality of magnet switches selectively output the load at a rated DC voltage while selectively passing through a diode.

Digital display of five meter values via voltage and current change display controller,

The time of equal operation is stored up to 20 times in year, month, day, hour, minute, second unit and output.

The voltage output to the capacitor is set to a value according to at least three channels for simple selection.

It detects a state less than or greater than 125V output to the load and informs the user, and at the same time passes it to the microprocessor to adjust the value of the power supply accordingly.

1 is a schematic diagram showing the configuration of a phase control circuit of a conventional charger.

Figure 2 is a block diagram showing the overall configuration of the present invention.

Figure 3 is a block diagram showing the configuration of the internal controller of the present invention.

Figure 4 is a block diagram showing the configuration of the front panel controller of the present invention.

5 is a block diagram showing a configuration of a microprocessor unit of the present invention.

6 shows the configuration of the voltage-current change display controller of the present invention.

Block diagram.

Figure 7 is a block diagram showing the configuration of the automatic drop controller of the present invention.

Brief description of the main parts of the drawing

50: internal controller 55: main controller

56: phase control unit 58: DC / AC power alarm amplifier

59: alarm controller 60: front panel controller

62 microprocessor unit 64 voltage current change display controller

66: Front Panel Control Unit 68: Microprocessor

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows the overall configuration of the present invention,

Three-phase voltage (R) (S) (T) and ground voltage (N) of AC 380V are applied to the primary side of the main transformer 32 via a three-phase no fuse breaker (NFB) 31. Make sure,

On the secondary side of the main transformer 32, the SCR bridge 35 made up of six SCRs through the surge removing TNR element 33 and the fuse 34 to be a proper DC power supply,

The DC power from the SCR bridge 35 is applied to the plurality of battery terminals via the flat choke coil 36 and the NFB 37 and then again through the NFB 38.

The voltage dropped through the plurality of diodes D11 to 1D1n is simultaneously supplied to the plurality of loads LOAD11 to LOAD13 via the NFBs 41 to 41b at rated voltage of DC 125V. and,

The diodes D11 to D1n of the voltage drop unit 40 allow the degree of the voltage drop to be controlled by the state in which the magnetic switches MS11 to MS1n are selectively turned on by the automatic drop controller 39 to allow DC 125V. Are simultaneously supplied to the plurality of loads LOAD11 to LOAD13 via the NFBs 41 to 41b at the rated voltage of

An AC voltmeter 43 is connected to the secondary side of the voltage transformer 42 in which the three-phase AC 380V is connected to the primary side to measure an input voltage.

The strength of the current supplied by connecting the ammeters 44 and 45 between the SCR bridge 35 and the NFB 37 and between the two NFBs 37 and 38 and the state of charge / discharge of the battery can be known. So that

Fuses for protecting the SCR bridge 35 are connected to both ends of the NFBs 31, 37, 38, 41, 41a, and 41b in parallel with alarm sensors ALS11 that recognizes the trip state in parallel. An alarm sensor ALS12 that recognizes a short circuit is connected to both ends of 34,

The internal controller 50 receiving AC power from the primary side of the main transformer 32 controls the SCR bridge 35 while controlling the internal operation while monitoring the state according to the internal operation.

The front panel controller 60, which is connected to the internal controller 50 and sends and receives data, informs the user of an internal operation state while receiving a user's option.

3 shows the configuration of the internal controller 50,

When the temperature inside the temperature sensor 52 is increased by the AC power supplied through the transformer 51 from the primary side of the main transformer 32, the operating power is supplied to the display panel 54 while operating the fan 53. Let's do it,

In the main controller 55 supplied with AC power through the transformer 51, a sequence control for selectively driving a specific one of a plurality of outputs according to an input signal, voltage conversion for converting AC power to DC power, and the DC power is detected to be lower than rated power,

In the phase controller 56 receiving the output voltage from the front panel controller 60 while receiving a variable resistance value for the operation control from the main controller 55, the AC power of R phase, S phase and T phase By controlling the pulse signal applied to the gate of the SCR bridge 35 connected through the transformer 57 to adjust the power supplied to the battery terminal,

The DC / AC power alarm amplification unit 58 that receives the AC power from the transformer 57 while receiving DC power from the main controller 55 outputs a signal according to the state of the DC power, and the state of the AC power. Outputs a signal according to

Signals according to the state of the DC power, signals according to the state of the AC power, positive (+) from the DC / AC power alarm amplifier 58, the main controller 55, and the alarm sensors ALS11 and ALS12. Signals due to grounding of negative and negative DC power lines, signals according to trips of NFBs 31, 37, 38, 41, 41a and 41b, and signals due to shorts in fuse 34 The alarm controller 59 receiving a signal according to the connection of the switch from the switch unit while receiving the input is to notify the user of the operation state while selectively lighting a plurality of lamps according to the internal operation.

4 shows a schematic configuration of the front panel controller 60,

The microprocessor unit 62, which is supplied with power for internal operation through the power supply unit 61, controls internal operation while exchanging data with the main controller 55 of the internal controller 50, as well as the internal operation. Outputs a control signal for phase control to the phase controller 56 of the controller 50,

The voltage current change display controller 64 supplied with power for internal operation through the power supply unit 63 receives data from the main controller 55 of the internal controller 50 and displays the display unit 65 of the front panel. Display the change of current and change of voltage.

The front panel controller 60 receiving data from the microprocessor unit 62 and the voltage current change display controller 64 selectively turns on various light emitting diodes according to an internal operation.

5 shows an internal configuration of the microprocessor unit 62,

When the initial power is supplied by the reset IC 67, the reset signal is inputted to the reset terminal, and the data signals D0 to (P07) outputted from the data output terminals P00 to P07 of the microprocessor 68 are initialized. D7) is output to the voltage and current change display controller 64 as a data signal according to the current value and the voltage value change state,

The data signals D0 to D7 from the microprocessor 68 are converted into digital signals by the digital-to-analog converter 70 via the tri-state latch 69 and passed through the amplifier 71 to the internal controller ( Output to the phase control unit 56 of the control unit 50 for controlling the phase,

In the time reservation IC 73 which receives the data signals D4 to D7 from the microprocessor 68 via the three-state buffer 72, information on the reservation time for the equal operation input by the user is stored in one year. Save and print up to 20 times with the correct time of year, month, day, hour, minute, second.

The microprocessor 68 inputs a selection signal to the tri-state buffer 72 directly or via an inverter 74 and simultaneously sends a chip selection signal CS to the time reservation IC 73 via an inverter 75. While inputting, the read signal and the write signal are selectively input through the data output terminals P25 to P26,

The signal output from the read terminal RD of the microprocessor 68 and the pulse output from the oscillator 76 selectively turn on the transistor TR1 for operating the buzzer BZ via the NAND gate 77. and,

Output voltage down switch (SW11), output voltage down switch (SW12), mode selection switch (SW13) to select the mode of time control and reservation time and voltage control, to select the operation method of equal operation, floating operation and manual operation The user's options via the shift switch SW14, the channel selection switch SW15 (SW16) (SW17) for selecting a predetermined voltage value, and the external switches are controlled by the microprocessor 68 via the tri-state buffer 78. Input to the input terminals P10 to P16,

In the two output terminals Q // Q of the flip-flop 79 having an input terminal T connected to the output terminal P33 of the microprocessor 68, the inverters I1 and I2 respectively pass through the microprocessor 68. Turn on the light emitting diode (LED1) (LED2) to inform the outside of the normal operation,

The output terminal P33 of the microprocessor 68 is connected to the relay 80 via an inverter I3 to be turned on when performing an equal operation by a reservation time.

In the output stages P34 to P36 of the microprocessor 68, LEDs (LED3) (LED4) indicating a state of selecting channels 1, 2, and 3 through inverters I4, I5, and I6, respectively. LED5 is selectively turned on.

6 shows an internal configuration of the voltage current change display controller 64.

The internal microprocessor 81 receives the data signals D0 to D7, the read / write signal R / W, the enable signal E, and the reset signal RS from the microprocessor 68. In order to output data for displaying the AC input voltage, the battery-side charging voltage, the load-side output voltage, the battery-side charging current and the load-side output currents through the analog / digital converter 82,

The internal microprocessor which receives a user's selection for selecting an output mode of an AC input voltage, a battery side charge voltage, a load side output voltage, a battery side charge current, and a load side output current displayed on the front panel through a mode switch SW18. The data signals D0 to D7 from 81 select the relays 85, 85a, 85b, 85c and 85d while operating the relay driver 84 via the tri-state latch 83. To work with

The data signals D0 to D7 from the internal microprocessor 81 are connected to the front panel via an AC side input voltage, a battery side charge voltage, a load side output voltage, a battery side charge current, The LED is selectively turned on to indicate which data of the load-side output current is displayed.

7 shows the internal configuration of the automatic drop controller 39,

+ 12V via the constant voltage diode ZD1 on the other side of the comparator 87, in which + 125V from the main controller 55 receives the comparison voltage divided by the variable resistor VR1 and the resistor R1 to one side. Is inputted to the reference voltage, and the output is turned on to turn on the transistor TR2, thereby causing the relay RY1 to drive while lighting the " H " level display light emitting diode LED6, thereby dropping the microprocessor through the inverter I7. Input to the input terminal RA0 of (88),

+ 12V via the constant voltage diode ZD2 on the other side of the comparator 89 in which + 125V from the main controller 55 receives the comparison voltage divided by the variable resistor VR2 and the resistor R2 to one side. Is inputted to the reference voltage, and the output is turned on, so that the relay RY2 is driven while the " L " level display light emitting diode LED7 is turned on by turning on the transistor TR3. Input to the input terminal RA1 of (88),

While the drive power supply Vcc is supplied to the collector of the transistor TR4 to which the control signal from the output terminal RA2 of the drop microprocessor 88 is applied to the base, the inverter I9 at the emitter of the transistor TR4. In accordance with the state to adjust the resistance value of the variable resistor (VR3) by being input to the input terminal (RA3) of the drop microprocessor 88 through the () and at the same time through the variable resistor (VR3) of the step-up / down switch. To adjust the voltage by 1 step,

The output terminal RB3 is directly inputted from the output terminal RB2 at the output terminal RB2 of the drop microprocessor 88 or via the inverter I10, and directly at the output terminal RB3. OR2) is input to the other side, so that its output is input to the enable terminal (E) of the two multiplexers (90, 91),

The two output terminals RB0 and RB1 of the drop microprocessor 88 are simultaneously input to the two input terminals A and B of the two multiplexers 90 and 91, respectively. ) Selectively turns on the relays RY3 to RY10 via the relay driver 92, and selectively turns on the magnet switches MS11 to MS1n shown in FIG. The degree of voltage drop is controlled by the state via D11 to D1n).

When the phase control circuit for a charger of the present invention configured as described above is correctly connected to the AC power supply at the input side and the polarity of the DC power supplied to the battery and the load is connected incorrectly, the next battery side NFB 31 is turned on and the AC power supply is turned on. The front panel controller controls the SCR bridge 35 while detecting whether the power is normally supplied by the internal controller 50 receiving the DC power input through the transformer 32 and exchanging data with the internal controller 50. In (60) is to inform the user of the internal operating status while receiving the user's options,

In the temperature sensor 52 that receives AC power through the transformer 51 on the primary side of the main transformer 32, when the internal temperature rises, the operating power is supplied to the display panel 54 while operating the fan 53. do.

The main controller 55 supplied with AC power through the transformer 51 has a sequence control for selectively driving a specific one of a plurality of outputs according to an input signal, voltage conversion for converting AC power to DC power, and the above. After detecting a state in which the DC power supply is lower than the rated power supply, the phase control unit 56 outputs a variable resistance value for operation control, and receives the output voltage from the front panel controller 60 while receiving the output voltage from the R and S phases. And controlling a pulse signal applied to the gate of the SCR bridge 35 connected to the AC power of the T phase through the transformer 57 to adjust the power supplied to the battery terminal.

In addition, the DC / AC power alarm amplifier 58 receiving the DC power from the transformer 57 while receiving DC power from the main controller 55 receives a signal according to the states of DC and AC power. 59) signals from the main controller 55 and the alarm sensors ALS11 and ALS12 according to the state of the DC power supply, the signal according to the state of the AC power supply, and the positive and negative signals. The signal from the ground fault of the DC power line, the signal from tripping of the NFB 31, 37, 38, 41, 41a, 41b and the signal from the short circuit of the fuse 34 and the switch from While receiving a signal according to the connection to selectively light up a plurality of lamps according to the internal operation to inform the user of the operating status.

The microprocessor unit 62, which is supplied with power for internal operation through the power supply unit 61, controls internal operation while exchanging data with the main controller 55 of the internal controller 50, as well as the internal operation. A control signal for controlling phase is output to the phase controller 56 of the controller 50 to control the power supplied to the storage battery and the loads LOAD11 to LOAD13.

The voltage current change display controller 64 supplied with power for internal operation through the power supply unit 63 receives data from the main controller 55 of the internal controller 50 and displays the display unit 65 of the front panel. Display and output the signal according to the change of current and change of voltage.

The front panel controller 60 which receives data from the microprocessor unit 62 and the voltage current change display controller 64 selectively turns on various light emitting diodes according to the internal operation so as to inform the external of the operation state. do.

On the other hand, the microprocessor 68 of the microprocessor unit 62 initialized by the reset IC 67 has an output voltage raising switch SW11, an output voltage lowering switch SW12, a time adjustment and a reservation time and voltage adjustment. Mode selection switch (SW13) for selecting mode, shift switch (SW14) for selecting operation method of equal operation and floating operation and manual operation, channel selection switch (SW15) (SW16) for selecting a predetermined voltage value in units of channels (SW17) and the user's options through the external switch through the three-state buffer 78, and then through the flip-flop 79 and the inverter (I1) (I2) to inform the outside whether or not normal operation While the diode LED1 (LED2) is turned on, the relay 80 connected through the inverter I3 is turned on so that an equal operation by the reserved time is performed, and at the same time, three channels are passed through the inverters I4, I5, and I6. Feet that indicate the status of the selection A diode (LED3) (LED4) (LED5) and to selectively light up.

The microprocessor 68 outputs the data signals D0 to D7 according to the state in which the current value and the voltage value are changed to the voltage current change display controller 64 so that the user can visually confirm the result.

The data signals D0 to D7 are also converted into digital signals by the digital-to-analog converter 70 via the tri-state latch 69 to control phase of the phase controller 56 of the internal controller 50. It outputs the information of the reservation time of equal operation up to 20 times a year through the three-state buffer 72 and outputs it as a control signal for up to 20 times a year, month, day, hour, minute and second. Store it as a time and print it out.

The microprocessor 68 inputs the selection signal to the three-state buffer 72 and inputs the chip selection signal CS to the time reservation IC 73 via the inverter 75 to store the data of the reservation time. Read or write.

The signal output from the read terminal RD of the microprocessor 68 is multiplied by the NAND gate 77 by the pulse output from the oscillator 76 to turn on / off the transistor TR1 to turn on the buzzer BZ. It is optional.

The internal microprocessor 81 receives the data signals D0 to D7, the read / write signal R / W, the enable signal E, and the reset signal RS from the microprocessor 68. Outputs data for displaying the AC side input voltage, the battery side charging voltage, the load side output voltage, the battery side charging current, and the load side output currents through the analog / digital converter 82 to the front panel controller 60.

The internal microprocessor 81 to which the mode switch SW18 for selecting the output mode displayed on the front panel is connected outputs the data signals D0 to D7 so that the tri-state latch 83 and the relay driver 84 are used. By selectively operating the relays 85 to 85d, the five instruments can be selectively displayed.

The data signals D0 to D7 are also connected to the front panel via a three-state latch 86, and any data among the AC side input voltage, the battery side charging voltage, the load side output voltage, the battery side charging current, and the load side output current is stored. A light emitting diode that indicates whether it is displayed is selectively lit.

+ 125V from the main controller 55 is compared with the reference voltage input to the other side of the comparator 87, in which the comparison voltage divided by the variable resistor VR1 and the resistor R1 is transmitted to one side, and its output is If large, the transistor TR2 is turned on while the " H " level display light emitting diode LED6 is turned on and the relay RY1 is driven to notify the drop microprocessor 88.

On the other hand, when the + 125V is less than the reference voltage inputted to the other side of the comparator 89 to which the comparison voltage divided by the variable resistor VR2 and the resistor R2 is transmitted to one side, the output of the transistor ( While turning on TR3), the " L " level display light emitting diode LED7 is turned on, and the drop microprocessor 88 is informed while driving the relay RY2.

While driving the control signal of the drop microprocessor 88 is supplied to the collector of the transistor TR4 applied to the base is supplied to the drop microprocessor 88 via the inverter I9 from the emitter By grounding through the variable resistor VR3 of the step-up / down switch, the voltage supplied to the capacitor is adjusted by increasing or decreasing the voltage supplied to the capacitor by one step at 125V according to the state of adjusting the resistance value of the variable resistor VR3.

While selectively enabling the multiplexers 90 and 91 in the drop microprocessor 88, the signals are output from the output terminals RB0 and RB1 of the drop microprocessor 88 through the multiplexers 90 and 91. The relay driver 92 is turned on and off to selectively drive the relays RY3 to RY10 and selectively turn on the magnet switches MS11 to MS1n shown in FIG. The voltage drop of the power supplied to the loads LOAD11 to LOAD13 is controlled by the state via the diodes D11 to D1n, so that a constant power supply is always possible.

Therefore, the controller of the charger of the present invention displays the five instrument values digitally through the voltage and current change display controller and informs the time of equal operation in units of years, months, days, hours, minutes, and seconds. Up to 20 times can be stored and output, and the voltage output to the capacitor can be set to a value according to at least three channels for simple selection, and a state less than or equal to 125V output to the load is detected. It informs the user and also delivers it to the microprocessor so that the power supply can be adjusted accordingly.

Claims (6)

The voltage of AC 380V is applied to the plurality of battery terminals by the SCR bridge 35 via the main transformer 32 to the appropriate DC power supply, In a phase control circuit of a charger which is simultaneously supplied to a plurality of loads (LOAD11) to (LOAD13) at rated voltage dropped while passing through a plurality of diodes (D11 to D1n), The diodes D11 to D1n of the voltage drop unit 40 allow the degree of the voltage drop to be controlled by the state in which the magnetic switches MS11 to MS1n are selectively turned on by the automatic drop controller 39 to allow DC 125V. Are simultaneously supplied to the plurality of loads LOAD11 to LOAD13 via the NFBs 41 to 41b at the rated voltage of The internal controller 50 receiving AC power from the primary side of the main transformer 32 controls the SCR bridge 35 while controlling the internal operation while monitoring the state according to the internal operation. The front panel controller (60) connected to the internal controller (50) to send and receive data is configured to notify the user of an internal operation state while receiving a user's option. According to claim 1, wherein the internal controller 50 is to control the sequence control and voltage conversion and the lower than the rated power supply in the main controller 55 is supplied with AC power through the transformer 51, The pulse signal applied to the SCR bridge 35 in the phase controller 56 receiving the output voltage from the front panel controller 60 while receiving a variable resistance value for the operation control from the main controller 55. To control The DC / AC power alarm amplification unit 58 that receives the AC power from the transformer 57 while receiving DC power from the main controller 55 outputs a signal according to the state of the DC power, and the state of the AC power. Outputs a signal according to The alarm controller 59 receives signals from the DC / AC power supply alarm amplification unit 58, the main controller 55, and the alarm sensors ALS11 and ALS12 according to the internal state. The controller of the charger to inform the user of the operation status while lighting a plurality of lamps. The phase controller of claim 1, wherein the front panel controller controls the internal operation of the microprocessor unit 62 that exchanges data with the main controller 55 of the internal controller 50. Outputs a control signal for phase control, In the voltage current change display controller 64 receiving data from the main controller 55, the change value of the current and the change value of the voltage are displayed on the display unit 65 of the front panel. The front panel controller (60), which receives data from the microprocessor unit (62) and the voltage current change display controller (64), selectively turns on various light emitting diodes according to an internal operation. 2. The microprocessor unit according to claim 1, wherein the data signal (D0) to (D7) output from the data output terminals (P00) to (P07) of the microprocessor (68) is the voltage current change display controller (64). To output the signal according to the changed state of current value and voltage value, The data signals D0 to D7 from the microprocessor 68 are converted into digital signals by the digital-to-analog converter 70 via the tri-state latch 69 and passed through the amplifier 71 to the internal controller ( Output to the phase control unit 56 of the control unit 50 for controlling the phase, In the time reservation IC 73 which receives the data signals D4 to D7 from the microprocessor 68 via the three-state buffer 72, information on the reservation time for the equal operation input by the user is stored in one year. Save and print up to 20 times with the correct time of year, month, day, hour, minute, second. The microprocessor 68 inputs a selection signal and a chip selection signal CS to the tri-state buffer 72 and the time reservation IC 73, respectively, through the data output terminals P25 to P26. Input a write signal, The signal output from the read terminal RD of the microprocessor 68 and the pulse output from the oscillator 76 operate the buzzer BZ while turning on the transistor TR1 via the NAND gate 77. User's option via output voltage down switch (SW11), output voltage down switch (SW12), mode selector switch (SW13), shift switch (SW14), channel selector switch (SW15) (SW16) (SW17) and external switches Is input to the input terminals P10 to P16 of the microprocessor 68 through the tri-state buffer 78, At the output terminal P32 of the microprocessor 68, the light emitting diodes LED1 and LED2 are turned on via the flip-flop 79 and the inverters I1 and I2. The output terminal P33 of the microprocessor 68 is connected to the relay 80 via an inverter I3 to be turned on when performing an equal operation by a reservation time. In the output stages P34 to P36 of the microprocessor 68, LEDs (LED3) (LED4) indicating a state of selecting channels 1, 2, and 3 through inverters I4, I5, and I6, respectively. Charger controller for selectively lighting (LED5). The display device of claim 1, wherein the voltage current change display controller is configured to transmit data signals D0 to D7, read / write signals R / W, enable signals E, and logic from the microprocessor 68. In the internal microprocessor 81 receiving the set signal RS, an analog / digital converter 82 is used to display an AC input voltage, a battery side charge voltage, a load side output voltage, a battery side charge current, and a load side output current. To output data, The internal microprocessor 81 which receives a selection of an output mode according to an AC input voltage, a battery side charge voltage, a load side output voltage, a battery side charge current, and a load side output current displayed on the front panel through a mode switch SW18. The data signals D0 through D7 via the tristate latch 83 pass through the tristate latch 86 while selectively operating the relays 85d through 85d while operating the relay driver 84. A controller of a charger for selectively lighting a light emitting diode. According to claim 1, The automatic drop controller is a reference via the constant voltage diode (ZD1) in the comparator (87) that + 125V receives the comparison voltage divided by the variable resistor (VR1) and the resistor (R1) to one side. The transistor TR2 is turned on while comparing with the voltage to turn on the " H " level display light emitting diode LED6 and to be input to the input terminal RA0 of the drop microprocessor 88 through the relay RY1 and the inverter I7. and, The transistor TR3 is turned on while + 125V is compared with the reference voltage via the constant voltage diode ZD2 in the comparator 89 which receives the comparison voltage divided by the variable resistor VR2 and the resistor R2 to one side. The L " level display light-emitting diode LED7 is turned on and input to the input terminal RA1 of the drop microprocessor 88 through the relay RY2 and the inverter I8. The control signal from the output terminal RA2 of the drop microprocessor 88 is inputted from the transistor TR4 applied to the base to the input terminal RA3 via the inverter I9 while the variable resistor of the step-up / down switch ( VR3) is connected so that the voltage can be adjusted by 1 step according to the state of adjusting its resistance value. The output terminal RB3 is directly inputted from the output terminal RB2 at the output terminal RB2 of the drop microprocessor 88 or via the inverter I10, and directly at the output terminal RB3. OR2) is input to the other side, so that its output is input to the enable terminal (E) of the two multiplexers (90, 91), The two output terminals RB0 and RB1 of the drop microprocessor 88 are simultaneously input to the two input terminals A and B of the two multiplexers 90 and 91, respectively. ) Selectively drives the relays RY3 to RY10 via the relay driver 92 to turn on the magnet switches MS11 to MS1n to turn on the diodes D11 to D1n of the voltage drop section 40. A controller for chargers that allows the degree of voltage drop to be controlled by a state of passing.