CN210042248U - High-molecular graphite carbon rod heating rail frequency conversion controller - Google Patents

Abstract

The utility model relates to a polymer graphite carbon-point heating rail frequency conversion controller, including zero cross detection circuit, silicon controlled rectifier trigger circuit and singlechip, zero cross detection circuit output external interrupt signal to the singlechip produces the alternating current zero point detected signal, silicon controlled rectifier trigger circuit is equipped with first photoelectric coupling and silicon controlled rectifier, the alternating current zero point detected signal is through first photoelectric coupling connection silicon controlled rectifier positive pole and control pole, silicon controlled rectifier positive pole and negative pole are through alternating current power supply connection the heating rail, through adjusting the conduction angle size of silicon controlled rectifier, in order to adjust alternating current power supply inserts the heating rail electric energy size; through increasing the positive zero passage detection circuit of voltage, cooperate the conduction angle of accurate control silicon controlled rectifier again, finally realize the change of output voltage from low to high, satisfy the high voltage's in the twinkling of an eye characteristic of carbon-point heating rail, also played the effect of protection to the life of carbon-point heating rail.

Description

High-molecular graphite carbon rod heating rail frequency conversion controller

Technical Field

The utility model relates to an electronic control technical field, concretely relates to rail frequency conversion controller is generated heat to polymer graphite carbon-point.

Background

The silicon controlled rectifier is called SCR for short, and is a high-power electrical component, also called thyristor; the device has the advantages of small volume, high efficiency, long service life and the like, can be used as a high-power driving device in an automatic control system, realizes the control of high-power equipment by using a low-power control, is widely applied to an alternating current and direct current motor speed regulating system, a power regulating system and a follow-up system, and can be used for high-power electrical appliances. According to the technical scheme of the existing product, the controllable silicon is controlled through pulse width modulation, the on-off circulation function can be realized only, the low-voltage starting function cannot be realized, and the reasonable control on the carbon rod heating rail cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a for solving the problem among the prior art and proposing, its aim at provides a variable frequency controller generates heat, realizes the carbon-point and generates heat the characteristic of rail high voltage in the twinkling of an eye, the effectual carbon-point rail that generates heat that has protected.

A high-molecular graphite carbon rod heating rail frequency conversion controller comprises a zero-crossing detection circuit, a silicon controlled trigger circuit and a single chip microcomputer, wherein the zero-crossing detection circuit outputs an external interrupt signal to the single chip microcomputer to generate an alternating current zero detection signal, the silicon controlled trigger circuit is provided with a first photoelectric coupling and a silicon controlled rectifier, the alternating current zero detection signal is connected with an anode and a control electrode of the silicon controlled rectifier through the first photoelectric coupling, the anode and the cathode of the silicon controlled rectifier are connected with a heating rail through an alternating current power supply, and the size of electric energy of the heating rail connected with the alternating current power supply is adjusted by adjusting the size of a conduction angle of the silicon controlled rectifier.

Preferably, the silicon controlled trigger circuit further comprises a first switch circuit, and the input end and the output end of the first switch circuit are respectively connected with the single chip microcomputer and the first photoelectric coupler.

Preferably, the first switch circuit adopts a triode, an emitting electrode of the triode is connected with the first photoelectric coupling input end, a base electrode of the triode is connected with the first control end PA1 of the single chip microcomputer, and a collector electrode of the triode is connected with a negative electrode.

Preferably, the silicon controlled rectifier trigger circuit is provided with a fusing circuit, and the fusing circuit is connected with the anode of the silicon controlled rectifier.

Preferably, the silicon controlled rectifier trigger circuit is provided with an RC resistance-capacitance absorption circuit, and the RC resistance-capacitance absorption circuit is connected between the silicon controlled rectifier and the alternating current power supply.

Preferably, the zero-cross detection circuit comprises a full-wave rectification circuit and a second photoelectric coupling, and the alternating current power supply is connected with the single chip microcomputer through the full-wave rectification circuit and the second photoelectric coupling.

Preferably, a first resistor R13 and a second resistor R14 are provided between the full-wave rectifying circuit and the ac power supply, a resistor R7 is provided between the full-wave rectifying circuit and the second photoelectric coupling, a first resistor R8 and a second resistor R15 are provided between the second photoelectric coupling and an interrupt pin of the single chip, and a capacitor C3 is connected in parallel between the first resistor R8 and the second resistor R15.

Preferably, the controller further comprises an NTC thermistor temperature sensor, and the NTC thermistor temperature sensor is connected with the single chip microcomputer.

The utility model discloses a rail frequency conversion controller is generated heat to polymer graphite carbon-point through increasing the positive zero-crossing detection circuit of voltage, the conduction angle of accurate control silicon controlled rectifier of deuterogamying finally realizes that output voltage is by low change to high, satisfies the characteristic of the high voltage in the twinkling of an eye of carbon-point heating rail, has also played the effect of protection to the life of carbon-point heating rail.

Drawings

Fig. 1 is a circuit diagram of zero-crossing detection.

Fig. 2 is a circuit diagram of a thyristor regulation circuit.

Fig. 3 is a schematic view of the overall structure of the high-molecular graphite carbon rod heating rail frequency conversion controller.

Description of the reference numerals

1-a first switching circuit; 2-first photoelectric coupling; 3-silicon controlled rectifier; 4-a connector; 5-full wave rectification circuit, 6-second photoelectric coupling; 7-a single chip microcomputer; 8-NTC thermistor temperature sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an implementation mode, refer to fig. 1-3, a macromolecule graphite carbon rod heating rail frequency conversion controller, including zero cross detection circuit, silicon controlled rectifier trigger circuit and singlechip 7, zero cross detection circuit output external interrupt signal to singlechip 7 produces alternating current zero point detected signal, silicon controlled rectifier trigger circuit is equipped with first switch circuit 1, first photoelectric coupling 2 and silicon controlled rectifier 3, the first switch circuit 1 input end and output end are connected respectively singlechip 7 with first photoelectric coupling 2, alternating current zero point detected signal is connected silicon controlled rectifier positive pole and control pole through first photoelectric coupling 2, silicon controlled rectifier positive pole and negative pole are connected the heating rail through alternating current power supply, so through adjusting the conduction angle size of silicon controlled rectifier 3, adjust the alternating current power supply inserts the heating rail electric energy size, the silicon controlled trigger circuit is also provided with a fusing circuit and an RC resistance-capacitance absorption circuit, the fusing circuit is connected with the anode of the silicon controlled, and the RC resistance-capacitance absorption circuit is connected between the silicon controlled 3 and the alternating current power supply; the zero-crossing detection circuit comprises a full-wave rectification circuit 5 and a second photoelectric coupling 6, and the alternating-current power supply is connected with the single chip microcomputer 7 through the full-wave rectification circuit 5 and the second photoelectric coupling 6; h1 in the figure 2 is a connector 4, and the thyristor trigger circuit is connected with the heating rail through the connector 4.

The first switch circuit 1 adopts a triode, an emitting electrode of the triode is connected with the input end of the first photoelectric coupling 2, a base electrode of the triode is connected with the first control end PA1 of the single chip microcomputer, and a collector electrode of the triode is connected with a negative electrode.

The high-molecular graphite carbon rod heating rail frequency conversion controller is divided into six parts, namely an LED display screen which is used for temperature display and data time display; an NTC thermistor temperature sensor 8 for temperature acquisition; DS1302 clock control, which acts as real-time control; the controllable silicon 3 is used for controlling voltage output; EEPROM information storage, which is used for taking charge of information power-off storage and touch keys; the LED display screen, the NTC thermistor temperature sensor 8, the DS1302 clock control, the EEPROM information storage, the controllable silicon 3 and the touch key are all connected with the single chip microcomputer 7, and the five items are all in bidirectional control with the single chip microcomputer 7.

The silicon controlled trigger circuit is further provided with a 5V VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R12, the VCC is connected with the resistor R1 and electrically connected with the first photoelectric coupler 2, a first control end PA1 of the single chip microcomputer 7 is connected with the resistor R4 and connected with the triode 11, and the resistor R1 and the resistor R4 are connected with the resistor R5 in parallel; one end of the resistor R2 is electrically connected with the first photoelectric coupler 2, and the other end of the resistor R2 is electrically connected with the anode of the controllable silicon; the resistor R12 is connected with the controllable silicon 3 in parallel and is connected with a capacitor C1 in series; the resistor R3 is connected with the heating rail through an alternating current power supply.

The zero-crossing detection circuit is connected with an interruption pin of the single chip microcomputer 7, the output end of the zero-crossing detection circuit is connected with alternating current, the zero-crossing detection circuit is sequentially provided with a full-wave rectification circuit 5 and a second photoelectric coupling 6, a resistor R13 and a resistor R14 are arranged between the alternating current and the full-wave rectification circuit 5, a resistor R7 is arranged between the full-wave rectification circuit 5 and the second photoelectric coupling 6, a resistor R8 and a resistor R15 are arranged between the second photoelectric coupling 6 and the interruption pin of the single chip microcomputer 7, and a capacitor C3 is connected in parallel between the resistor R8 and the resistor R15.

The working principle of the utility model, referring to fig. 1-2, the working process and signal requirement of the zero-crossing detection circuit, the 220V alternating current firstly passes through the first resistor R13 and the second resistor R14 for voltage division, passes through the diode full-wave rectification circuit 5, and then enters the first photoelectric coupler 2; assuming that the input is an A-phase voltage, after rectification, the A-phase voltage is changed into a waveform with the positive half cycle frequency of 100HZ, after the waveform enters the first photoelectric coupler 2, two falling edges are generated in one period and are sent to an interrupt pin (INT 0 pin) outside the singlechip 7 along pulses, and an interrupt program is entered.

Direct relationship of zero-crossing detection circuit and conduction angle: the singlechip 7 adjusts a conduction angle through a zero-crossing detection circuit, the conduction angle directly exists in alternating current, the size of the conduction angle determines the size of output current, and the quantity of electric energy can be connected to a load, so that the acting energy of the load can be changed by adjusting the conduction angle; for example, the conduction angles of all the bidirectional thyristors are 0 degree, and the output voltage is 220V; through adding the hardware zero-crossing detection circuit and the positive voltage zero-crossing detection circuit, the change of the output voltage from low to high is finally realized by accurately controlling the conduction angle of the controlled silicon 3, the characteristic of the carbon rod heating rail on the instant high voltage is met, and the service life of the carbon rod heating rail is greatly prolonged.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a high molecule graphite carbon-point heating rail frequency conversion controller which characterized in that: the power supply comprises a zero-crossing detection circuit, a silicon controlled trigger circuit and a single chip microcomputer (7), wherein the zero-crossing detection circuit outputs an external interrupt signal to the single chip microcomputer (7) to generate an alternating current zero detection signal, the silicon controlled trigger circuit is provided with a first photoelectric coupling (2) and a silicon controlled rectifier (3), the alternating current zero detection signal is connected with an anode and a control electrode of the silicon controlled rectifier through the first photoelectric coupling (2), the anode and the cathode of the silicon controlled rectifier are connected with a heating rail through an alternating current power supply, and the size of electric energy of the alternating current power supply connected into the heating rail is adjusted by adjusting the size of a conduction angle of the silicon controlled rectifier (3).

2. The high-molecular graphite carbon rod heating rail frequency conversion controller according to claim 1, wherein the silicon controlled trigger circuit further comprises a first switch circuit (1), and an input end and an output end of the first switch circuit (1) are respectively connected with the single chip microcomputer (7) and the first photoelectric coupler (2).

3. The high-molecular graphite carbon rod heating rail frequency conversion controller according to claim 2, wherein the first switching circuit (1) adopts a triode, an emitter of the triode is connected with the input end of the first photoelectric coupling (2), a base of the triode is connected with the first control end PA1 of the singlechip (7), and a collector of the triode is connected with a negative electrode.

4. The high-molecular graphite carbon rod heating rail frequency conversion controller according to claim 1, wherein the silicon controlled rectifier trigger circuit is provided with a fusing circuit, and the fusing circuit is connected with an anode of the silicon controlled rectifier.

5. The high-molecular graphite carbon rod heating rail frequency conversion controller according to claim 1, wherein the silicon controlled rectifier trigger circuit is provided with an RC resistance-capacitance absorption circuit, and the RC resistance-capacitance absorption circuit is connected between the silicon controlled rectifier (3) and the alternating current power supply.

6. The high molecular graphite carbon rod heating rail frequency conversion controller according to claim 1, wherein the zero-crossing detection circuit comprises a full-wave rectification circuit (5) and a second photoelectric coupling (6), and the alternating current power supply is connected with the single chip microcomputer (7) through the full-wave rectification circuit (5) and the second photoelectric coupling (6).

7. The high polymer graphite carbon rod heating rail frequency conversion controller according to claim 6, wherein a first resistor R13 and a second resistor R14 are arranged between the full-wave rectification circuit (5) and the alternating current power supply, a third resistor R7 is arranged between the full-wave rectification circuit (5) and the second photoelectric coupling (6), a fourth resistor R8 and a fifth resistor R15 are arranged between the second photoelectric coupling (6) and an interrupt pin of the single chip microcomputer (7), and a capacitor C3 is connected in parallel between the fourth resistor R8 and the fifth resistor R15.

8. The high-molecular graphite carbon rod heating rail frequency conversion controller according to claim 1, further comprising an NTC thermistor temperature sensor (8), wherein the NTC thermistor temperature sensor (8) is connected to the single chip microcomputer (7).

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