Control panel with voltage regulating function

Abstract

The utility model discloses a control panel with a voltage regulation function, which comprises an MCU (Microprogrammed Control Unit) main control chip, the MCU main control chip is electrically connected with a voltage detection circuit, a voltage regulation circuit and a filter circuit, the voltage regulation circuit is electrically connected with the filter circuit, and the voltage regulation circuit is electrically connected with a load; the voltage detection circuit comprises a comparator U, a pin 1 of the comparator U is electrically connected with a positive electrode of a diode D1 and one end of a resistor R3, and a pin 4 of the comparator U and a negative electrode of the diode D1 are electrically connected with a reference voltage VCC. According to the utility model, through the cooperation of the voltage detection circuit, the voltage regulation circuit and the filter circuit, stable voltage regulation processing can be carried out when the voltage input by the MCU main control chip is relatively high, so that the voltage input to the load is a stable standard voltage, and the voltage regulation protection mode does not need to cut off a power supply and reduces the influence on the normal work of a control panel due to the over-high voltage.

Description

TECHNICAL FIELD

[0001] The utility model relates to control panel technical field especially relates to a control panel with voltage regulation function. BACKGROUND

[0002] Control panel is a kind of circuit board, for realizing control function, widely used in various automation equipment, control panel is through integrated electronic component and circuit design, realizes the automation control to specific task, control panel is powered by external voltage in the use process, when external voltage is too high, electrical equipment still works, there is security risk;In order to reduce security risk, overvoltage protection circuit is arranged on the control panel of prior art for overvoltage protection to control panel, and the principle of overvoltage protection is that power supply is automatically cut off to protect when voltage is too high, this kind of direct power supply protection mode can play the effect of protection, but it will affect the normal work of control panel, for this purpose, the present application provides a kind of control panel with voltage regulation function. UTILITY MODEL CONTENT

[0003] The utility model aims at solving the shortcomings in the prior art and provides a control panel with voltage regulation function.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A control panel with voltage regulation function, including MCU main control chip, the MCU main control chip is electrically connected with voltage detection circuit, voltage regulation circuit and filter circuit, the voltage regulation circuit is electrically connected with filter circuit, voltage regulation circuit is electrically connected with load;

[0006] The voltage detection circuit includes comparator U, the positive pole of diode D1 and one end of resistance R3 are electrically connected to the pin 1 of comparator U, the pin 4 of comparator U and the negative pole of diode D1 are electrically connected with reference voltage VCC, one end of capacitor C1 and one end of resistance R2 are electrically connected to the other end of resistance R3, the other end of capacitor C1 and the other end of resistance R2 are all grounded, one end of resistance R1 is also electrically connected to the other end of resistance R3, the other end of resistance R1 is electrically connected with the voltage input pin of MCU main control chip, one end of resistance R4 is electrically connected to the pin 2 of comparator U, one end of capacitor C2 is electrically connected to the other end of resistance R4, the other end of capacitor C2 is electrically connected with the pin 3 of comparator U, one end of capacitor C3 is electrically connected with the pin 3 of comparator U, the other end of capacitor C3 is grounded, and the pin 3 of comparator U is electrically connected with the signal receiving pin of MCU main control chip.

[0007] Preferably, the filter circuit comprises a rectifier D4, a capacitor C8 and a capacitor C7, the pin 2 and the pin 4 of the rectifier D4 are electrically connected with the voltage input pin of the MCU main control chip, the pin 1 and the pin 3 of the rectifier D4 are connected with the capacitor C8 and the capacitor C7 in parallel, and the capacitor C8 and the capacitor C7 are connected in parallel.

[0008] Preferably, the voltage regulating circuit comprises a triode Q1, the collector of the triode Q1 is electrically connected with the pin 1 of the rectifier D4, one end of a resistor R5, the negative electrode of a diode D2 and one end of a capacitor C6 are electrically connected with the base of the triode Q1, one end of the capacitor C7 is electrically connected with the other end of the resistor R5, the positive electrode of the diode D2 is electrically connected with the pin 3 of the rectifier D4, the positive electrode of the diode D2 is electrically connected with the pin 3 of a slide resistor W1, the pin 2 of the slide resistor W1 is electrically connected with the pin 3 of the rectifier D4, the pin 1 of the slide resistor W1 is electrically connected with the other end of the capacitor C6, one end of a resistor R7, one end of a capacitor C5 and the positive electrode of a diode D3 are electrically connected with the emitter of the triode Q1, the other end of the resistor R7 is electrically connected with the pin 1 of the slide resistor W1, one end of a resistor R6 is electrically connected with the other end of the capacitor C5, the other end of the resistor R6 is electrically connected with the pin 3 of the rectifier D4, one end of a capacitor C4 is electrically connected with the negative electrode of the diode D3, the other end of the capacitor C4 is electrically connected with the pin 3 of the rectifier D4, and the one end and the other end of the capacitor C4 are electrically connected with the load.

[0009] Preferably, the voltage detection circuit is used for detecting the input voltage of the MCU main control chip, and the comparator U is used for comparing the input voltage of the MCU main control chip with a reference voltage, and when the input voltage is higher than a threshold value, a high level is output to the MCU main control chip.

[0010] Preferably, the resistor R5, the slide resistor W1, the resistor R7 and the resistor R6 are used for voltage regulating and voltage dividing of the input voltage.

[0011] Preferably, the diode D3 is a voltage stabilizing diode, used for voltage stabilizing of the voltage after voltage regulating, and the capacitor C4 and the capacitor C5 are filter capacitors, used for filtering the voltage after voltage regulating again.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] The utility model discloses a voltage detection circuit, voltage regulating circuit and filter circuit cooperate, can when the voltage of MCU main control chip input is higher, carry out stable voltage regulating processing, make the voltage that input to the load be stable standard voltage, this kind of voltage regulating protection mode, need not cut off the power supply, reduce voltage excessively high influence control board's normal work. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1The utility model provides a connection block diagram of control panel with voltage regulation function.

[0015] Fig. 2 The utility model provides a circuit diagram of voltage detection circuit of control panel with voltage regulation function.

[0016] Fig. 3 The utility model provides a circuit diagram of voltage regulation circuit, filter circuit and MCU main control chip connection of control panel with voltage regulation function. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0018] Referring to Figs. 1-3 A control panel with voltage regulation function includes MCU main control chip, and the MCU main control chip is electrically connected with voltage detection circuit, voltage regulation circuit and filter circuit, the voltage regulation circuit is electrically connected with the filter circuit, and the voltage regulation circuit is electrically connected with load.

[0019] The voltage detection circuit is used for detecting the input voltage of the MCU main control chip, and the voltage detection circuit includes comparator U, the positive pole of diode D1 and one end of resistance R3 are electrically connected to the pin 1 of comparator U, the pin 4 of comparator U and the negative pole of diode D1 are electrically connected with reference voltage VCC, comparator U is used for comparing the voltage inputted by the MCU main control chip with reference voltage, when the input voltage is higher than threshold value, high level is outputted to the MCU main control chip, the other end of resistance R3 is electrically connected with one end of capacitor C1 and one end of resistance R2, the other end of capacitor C1 and the other end of resistance R2 are all grounded, the other end of resistance R3 is also electrically connected with one end of resistance R1, the other end of resistance R1 is electrically connected with the voltage input pin of the MCU main control chip, one end of resistance R4 is electrically connected with the pin 2 of comparator U, the other end of resistance R4 is electrically connected with one end of capacitor C2, the other end of capacitor C2 is electrically connected with the pin 3 of comparator U, one end of capacitor C3 is electrically connected with the pin 3 of comparator U, the other end of capacitor C3 is grounded, and the pin 3 of comparator U is electrically connected with the signal receiving pin of the MCU main control chip.

[0020] The filter circuit includes rectifier D4, capacitor C8 and capacitor C7, the voltage input pin of the MCU main control chip is electrically connected with the pin 2 and the pin 4 of rectifier D4, the pin 1 and the pin 3 of rectifier D4 are connected with capacitor C8 and capacitor C7 in parallel, and capacitor C8 and capacitor C7 are connected in parallel.

[0021] The voltage regulating circuit comprises a transistor Q1, the collector of the transistor Q1 is electrically connected with the pin 1 of the rectifier D4, the base of the transistor Q1 is electrically connected with one end of the resistor R5, the negative pole of the diode D2 and one end of the capacitor C6, the other end of the resistor R5 is electrically connected with one end of the capacitor C7, the positive pole of the diode D2 is electrically connected with the pin 3 of the rectifier D4, the positive pole of the diode D2 is electrically connected with the pin 3 of the slide resistor W1, the pin 2 of the slide resistor W1 is electrically connected with the pin 3 of the rectifier D4, the pin 1 of the slide resistor W1 is electrically connected with the other end of the capacitor C6, the emitter of the transistor Q1 is electrically connected with one end of the resistor R7, one end of the capacitor C5 and the positive pole of the diode D3, the other end of the resistor R7 is electrically connected with the pin 1 of the slide resistor W1, the other end of the capacitor C5 is electrically connected with one end of the resistor R6, the other end of the resistor R6 is electrically connected with the pin 3 of the rectifier D4, the negative pole of the diode D3 is electrically connected with one end of the capacitor C4, the other end of the capacitor C4 is electrically connected with the pin 3 of the rectifier D4, and the one end and the other end of the capacitor C4 are electrically connected with the load;

[0022] The resistor R5, the slide resistor W1, the resistor R7 and the resistor R6 are used for voltage regulating and voltage division of the input voltage, the diode D3 is a voltage stabilizing diode and is used for voltage stabilizing of the voltage after voltage regulating, the capacitor C4 and the capacitor C5 are filter capacitors and are used for filtering the voltage after voltage regulating again, so that the voltage input to the load is a stable standard voltage; the voltage detecting circuit, the voltage regulating circuit and the filter circuit are matched, stable voltage regulating is carried out when the voltage input by the MCU main control chip is high, the voltage input to the load is a stable standard voltage, and the voltage regulating protection mode does not need to cut off the power supply, and the normal work of the control board is not affected by the excessively high voltage.

[0023] Working principle: when using, the control panel works, through the MCU main control chip input voltage, its voltage to voltage detection circuit, through the resistance R1, resistance R2, resistance R3 and capacitor C1 cooperate, collect voltage, the voltage collected by diode D1 voltage stabilizing, the voltage after stabilizing input to comparator U, comparator U will collect voltage and reference voltage VCC comparison, when the input voltage is higher than the threshold, output high level to MCU main control chip, MCU main control chip control triode Q1 conduction, and high voltage input to filter circuit, rectifier D4, capacitor C8 and capacitor C7 in filter circuit voltage filtering processing, the voltage after filtering processing is transmitted to voltage regulating circuit, through resistance R5, slide resistance W1, resistance R7 and resistance R6 cooperate to input voltage voltage regulating, the voltage after voltage regulating is stabilized by diode D3, and through capacitor C4 and capacitor C5 again filtering processing, make the voltage transmitted to the load is stable standard voltage, through the way of detecting voltage higher in time voltage regulating, do not need to cut off the power supply, reduce the voltage too high influence control panel normal work;

[0024] In addition, through the way of filtering processing to high voltage and then voltage regulating, to eliminate the noise and interference in voltage, and provide stable input voltage to voltage regulating circuit, so as to ensure the stability of voltage regulating.

[0025] The above, only for the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled in the art of the technical personnel in the technical range disclosed by the present application, according to the technical scheme of the present application and the utility model concept of the present application are equivalent to replace or change, should be covered in the protection scope of the present application.

Claims

1. A control panel with voltage regulation function, comprising an MCU master control chip, characterized in that, The MCU main control chip is electrically connected with a voltage detection circuit, a voltage regulating circuit and a filter circuit, the voltage regulating circuit is electrically connected with the filter circuit, and the voltage regulating circuit is electrically connected with a load; The voltage detection circuit comprises a comparator U, the pin 1 of the comparator U is electrically connected with the positive electrode of a diode D1 and one end of a resistor R3, the pin 4 of the comparator U and the negative electrode of the diode D1 are electrically connected with a reference voltage VCC, the other end of the resistor R3 is electrically connected with one end of a capacitor C1 and one end of a resistor R2, the other end of the capacitor C1 and the other end of the resistor R2 are grounded, the other end of the resistor R3 is further electrically connected with one end of a resistor R1, the other end of the resistor R1 is electrically connected with the voltage input pin of the MCU main control chip, the pin 2 of the comparator U is electrically connected with one end of a resistor R4, the other end of the resistor R4 is electrically connected with one end of a capacitor C2, the other end of the capacitor C2 is electrically connected with the pin 3 of the comparator U, the pin 3 of the comparator U is electrically connected with one end of a capacitor C3, the other end of the capacitor C3 is grounded, and the pin 3 of the comparator U is electrically connected with the signal receiving pin of the MCU main control chip.

2. The control panel with voltage regulation function according to claim 1, characterized in that, The filter circuit comprises a rectifier D4, a capacitor C8 and a capacitor C7, the pins 2 and 4 of the rectifier D4 are electrically connected with the voltage input pin of the MCU main control chip, and the pins 1 and 3 of the rectifier D4 are connected with the capacitor C8 and the capacitor C7 in parallel.

3. The control panel with voltage regulation function according to claim 2, characterized in that, The voltage regulating circuit comprises a triode Q1, the collector of the triode Q1 is electrically connected with the pin 1 of the rectifier D4, the base of the triode Q1 is electrically connected with one end of a resistor R5, the negative electrode of a diode D2 and one end of a capacitor C6, the other end of the resistor R5 is electrically connected with one end of the capacitor C7, the positive electrode of the diode D2 is electrically connected with the pin 3 of the rectifier D4, the positive electrode of the diode D2 is electrically connected with the pin 3 of a slide resistor W1, the pin 2 of the slide resistor W1 is electrically connected with the pin 3 of the rectifier D4, the pin 1 of the slide resistor W1 is electrically connected with the other end of the capacitor C6, the emitter of the triode Q1 is electrically connected with one end of a resistor R7, one end of a capacitor C5 and the positive electrode of a diode D3, the other end of the resistor R7 is electrically connected with the pin 1 of the slide resistor W1, the other end of the capacitor C5 is electrically connected with one end of a resistor R6, the other end of the resistor R6 is electrically connected with the pin 3 of the rectifier D4, one end of a capacitor C4 is electrically connected with the negative electrode of the diode D3, the other end of the capacitor C4 is electrically connected with the pin 3 of the rectifier D4, and the capacitor C4 is electrically connected with the load.

4. The control panel with voltage regulation function according to claim 1, characterized in that, The voltage detection circuit is used for detecting the input voltage of the MCU main control chip, the comparator U is used for comparing the input voltage of the MCU main control chip with the reference voltage, and a high level is output to the MCU main control chip when the input voltage is higher than the threshold value.

5. The control panel with voltage regulation function according to claim 3, characterized in that, The resistor R5, the slide resistor W1, the resistor R7 and the resistor R6 are used for voltage regulating and voltage dividing of the input voltage.

6. The control panel with voltage regulation function according to claim 3, characterized in that, The diode D3 is a voltage stabilizing diode and is used for stabilizing the voltage after voltage regulation, and the capacitor C4 and the capacitor C5 are filter capacitors and are used for filtering the voltage after voltage regulation again.

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