KR900001387Y1 - Controll apparatus for auto electric source - Google Patents

Abstract

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Description

Automatic power control

The accompanying drawings are detailed circuit diagrams of an automatic power supply control apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: Schmitt trigger part 2: Counter part

3: counter 4,5: on and off time setting part

6,7: comparator 8: power supply

9: clear section

The present invention relates to an automatic power supply control device that controls the time that power is applied to various electronic and electronic devices such as a television receiver and an electric rice cooker, and in particular, an automatic power supply that enables to arbitrarily set the time when the power is applied and the time when the power is cut off. It relates to a control device.

Conventionally, there are various control devices for controlling the time when the power is applied and cut off, but most of them are configured to control only the time when the power is applied or to control only the time when the power is cut off. There was a fault.

The present invention has been conceived in order to control all the time that the power is applied and cut off in view of the conventional combination as described in detail by the accompanying drawings as follows.

As shown in the accompanying drawings, the Schmitt trigger unit 1 for converting the AC power AC of 60 kV through the transformer T ₁ into a square wave, and the output signal of the Schmitt trigger unit 1 is counted to 1 A counter unit 2 consisting of a 60-degree counter (CO ₁ ) (CO ₂ ) (CO ₃ ) for outputting one pulse signal at a time, a counter (3) for counting an output signal of the counter unit (2); On and off time setting of the output signal of the counter (3) and the switch (SW ₁ -SW ₃ ), (SW ₄ -SW ₆ ) and resistors (R ₁ -R ₃ ), (R ₄ -R ₆ ) The control unit (AC) controls the AC power applied to the load according to the output signals of the comparators 6 and 7 comparing the output signals of the units 4 and 5 and the output signals of the comparators 6 and 7. Flip-flop (FF ₁ ) and inverter (I ₁ ) transistors TR ₁ , TR ₂ , resistors R _7- R ₁₁ , porter coupler PC ₁ , which selectively enable comparators 6, 7, Power supply consisting of triac (TC ₁ ), reset switch (SW ₇ ) and relay (RL ₁ ) (8) and a resistor (R ₁₂ ) and an inverter (I ₂ ) for clearing the counter (3) in accordance with the output signal of the power supply (8), and for clearing the sixty- _fourth counter (CO ₁ -CO ₃ ). ), the NAND gate (NAND _1), the reset switch (to be configured to SW ₈₎ of a cleared portion (9), switches (R ₁₁ of the relay (RL ₁₎ above) is when the drive relay (RL ₁₎ AC power supply AC is applied to the load by disconnecting, and reference numeral Vcc in the description of the drawing is a power supply terminal.

Referring to the effects of the present invention configured in this way in detail as follows.

The AC power source (AC) is applied to the 60㎐, switches (SW ₁ -SW ₃₎ in the on and off time setting unit (4) (5) while the power to the power supply terminal (Vcc) applied state (SW ₄ -SW ₆ ) is selectively shorted and the reset switch SW ₇ (SW _S ) is short-circuited. Then, a low potential is applied to the inverter I ₂ to output a high potential to its output terminal. The output high potential is applied to the clear terminal (CLR ₁ -CLR ₃ ) of the 60-degree counter (CO ₁ -CO ₃ ) so that it is cleared and the low potential is applied to one input terminal of the NAND gate (NAND ₁ ). The high potential is output from the NAND gate NAND ₁ to clear the counter 3, and a low potential is applied to the reset terminal RST of the flip-flop FF ₁ by the reset switch SW _S.

Accordingly, the low potential is output from the output terminal OT of the flip-flop FF ₁ and is applied to the enable terminal EN ₁ of the comparator 6 and inverted to a high potential through the inverter I ₁ . Since the comparator 6 is enabled and is normally operated because it is applied to the enable terminal EN _{2 of the} comparator, the comparator 7 is not operated, and a low potential is applied to the base of the transistor TR ₁ so that the transistor is turned off. Since the TR ₂ is also turned off, the light emitting unit PD ₁ of the photocoupler PC ₁ does not emit light, and thus the light receiving unit PTC ₁ is blocked, so that the triac TC ₁ is blocked, thereby relaying ( Since RL ₁ ) is not driven, its switch RL ₁₁ is opened so that AC power AC is not applied to the load.

The AC power supply AC of 60 kW is input to the Schmitt trigger unit 1 through the transformer T ₁ , and the Schmitt trigger unit 1 outputs 60 pulse signals in 1 second, and the output pulse signal. Is input to the 60-degree counter (CO ₁ ) and the counter (CO ₂ ) outputs one pulse signal per second, the pulse signal output from the counter (CO ₁ ) is input to the 60-degree counter (CO ₂ ) (CO ₂ ) outputs one pulse signal per minute, and the pulse signal output from the counter (CO ₂ ) is input to the 60-degree counter (CO ₃ ), the counter (CO ₃ ) is one pulse signal per hour That is, the counter unit 2 outputs one pulse signal per time, and the pulse signal output from the counter unit 2 is counted by the counter 3 and output to the output terminals Q ₀ -Q ₃ .

In this state, when the time set by the on-time setting unit 4 is reached, the signal output from the counter 3 and input to the one input terminal P ₁₁ -P ₁₃ of the comparator 6 and the other input terminal thereof ( Since the signals input to S ₁₁ -S ₁₃ are the same, the comparator 6 outputs a low potential to its output terminal OUT ₁ to clock the other input terminal of the NAND gate NAND ₁ and the flip-flop FF ₁ . The NAND gate NAND ₁ outputs a high potential, thereby clearing the counter 3 and outputting a high potential at the output terminal OT of the flip-flop FF ₁ . The output high potential is applied to the enable terminal EN _{1 of the} comparator 6 to stop the operation of the comparator 6 and to be inverted to a low potential through the inverter I ₁ to enable the terminal of the comparator 7. since the comparator is applied to the (EN ₂₎ (7) is enabled and in the normal operation, and a high potential output from the flip-flop (FF ₁₎ transfected Requester is applied to the base of (TR ₁₎ and he turned on, the transistor (TR ₁₎ is also so has been lit, the light emitting portion (PD ₁₎ light receiving portion (PTC ₁₎ is rendered conductive triac (TC ₁₎ are turned into a conductive state The relay RL ₁ is driven so that the AC power AC is applied to the load through the switch RL ₁₁ .

In this way, the low potential is output from the comparator 6, the counter 3 is cleared, the comparator 6 is not enabled, the operation is stopped, the comparator 7 is enabled, and the flip-flop FF ₁ In the state where the high potential is output and the AC power is applied to the load, the counter 3 continuously counts one pulse signal output from the counter 2 once per hour, and at this time, the off time setting unit 4 When the set time is reached, the signal output from the counter 3 and input to one input terminal P ₂₁ -P ₂₃ of the comparator 7 and the signal input to the other input terminal S ₂₁ -S _{23 thereof} are the same. Therefore, the comparator 7 also outputs a low potential to the output terminal OUT ₂ and is applied to the other input terminal of the NAND gate NAND ₁ and the clock terminal CK of the flip-flop FF ₁ , and thus the NAND gate ( The high potential is output from NAND ₁ ), and the counter 3 is cleared, and to the output terminal OT of the flip-flop FF ₁ . The low potential is output so that the comparator 6 is enabled as described above, the comparator 7 is stopped, and the transistor TR ₁ is turned off by the low potential output from the output terminal OT. The transistor TR ₂ is turned off, the light emitting part PD ₁ is not turned on, and the light receiving part PT ₁ and the triac TC ₁ are turned off, so that the driving of the relay RL ₁ is stopped, and The applied AC power source AC is cut off.

As described above, the present invention can arbitrarily adjust the time when the power is applied to the device as well as the cutoff time, so that the user can conveniently use the device.

Claims (1)

A Schmitt trigger unit 1 for converting an AC power source AC through a transformer T ₁ into a square wave, and a counter unit for counting clock signals of the Schmitt trigger unit 1 and outputting one pulse signal at a predetermined time ( 2), a comparator for comparing the counter 3 for counting the output signal of the counter 2, the output signal of the counter 3 and the output signal of the on and off time setting sections 4, 5; (6) (7) and the comparator (6) (7) is selectively enabled according to the output signal of the comparator (6) (7) and controls the AC power source (AC) applied to the load By pressing the power supply unit 8 and the reset switch SW ₈ , the counter 2 and the counter 3 are cleared and the counter 3 is output in accordance with the output signals of the comparators 6 and 7. Automatic power control device, characterized in that consisting of a clear section (9) to clear.