阅读说明：本技术 一种555相控软启动限流保护直流稳压电源 (555 phase control soft start current limiting protection direct current stabilized power supply ) 是由 卞京 段卫斌 毕盈盈 于 2019-12-02 设计创作，主要内容包括：本发明公开了一种555相控软启动限流保护直流稳压电源,主要由触发器、相控可控硅、触发同步开关、延时电容器、触发控制电路、相控同步信号源、触发电路电源组成。触发器选用性能优良、价格低廉的555时基集成电路芯片,并与相控可控硅、触发同步开关、延时电容器、触发控制电路、相控同步信号源进行特定的连接,构成一种具有软启动及限流保护的独特的时基相控触发电路。本发明与现有相控直流稳压电源相比,由于避开了复杂的分立元件电路和单片机控制系统,所以结构相对简单。其抗干扰能力强,工作稳定性、可靠性进一步提高。由于结构简单,核心部件555芯片价格低廉,相控触发电路的成本大幅下降。(The invention discloses a 555 phase control soft start current limiting protection direct current stabilized power supply which mainly comprises a trigger, a phase control silicon controlled rectifier, a trigger synchronous switch, a time delay capacitor, a trigger control circuit, a phase control synchronous signal source and a trigger circuit power supply. The trigger selects a 555 time-base integrated circuit chip with excellent performance and low price, and is specifically connected with the phase-controlled silicon controlled rectifier, the trigger synchronous switch, the delay capacitor, the trigger control circuit and the phase-controlled synchronous signal source to form a unique time-base phase-controlled trigger circuit with soft start and current-limiting protection. Compared with the existing phase-control direct-current stabilized voltage power supply, the phase-control direct-current stabilized voltage power supply has a relatively simple structure because complex discrete component circuits and a singlechip control system are avoided. Its anti-interference ability is strong, and its working stability and reliability are further raised. Because simple structure, core component 555 chip low price, the cost of controlling trigger circuit mutually descends by a wide margin.)

1. The utility model provides a 555 phase control soft start current-limiting protection DC voltage stabilizing power supply, includes trigger, phase control silicon controlled rectifier, triggers synchro switch, delay capacitor, trigger control circuit, phase control synchronizing signal source, trigger drive circuit, soft start circuit, current-limiting protection circuit, trigger circuit power, its characterized in that: the trigger is a 555 time-base integrated circuit chip and is used for generating a trigger pulse signal for controlling the conduction of the phase-controlled silicon controlled rectifier;

the phase control silicon controlled rectifier plays a role of a contactless switch;

the trigger synchronous switch comprises an input tube and an output tube and is used for synchronizing the positive working voltage of the controllable silicon and a trigger pulse signal;

the trigger control circuit comprises a trigger control tube and a voltage stabilizing diode; the trigger delay angle and the conduction angle are controlled by controlling the charging time of the delay capacitor so as to realize the control of the output voltage of the delay capacitor;

the phase control synchronous signal source provides synchronous signals for the synchronous switch;

the trigger driving circuit amplifies the trigger current to drive the high-power silicon controlled rectifier to work;

the soft start control circuit comprises a soft start control tube and a soft start capacitor and is used for prolonging the start time of the phase control power supply;

the current-limiting protection circuit comprises a current-limiting protection control tube and a current-limiting sampling resistor and is used for limiting the output current of the phase control power supply and preventing overload and load short circuit;

the trigger circuit power supply provides stable working voltage for the trigger circuit.

2. The 555 phased soft start current-limiting protection dc voltage regulator according to claim 1, wherein: the output end of the 555 time-base integrated circuit chip is connected with the input end of the trigger driving circuit through a first delay capacitor and a first resistor; the output end of the trigger driving circuit is connected with a control electrode of the phase-controlled silicon controlled rectifier; the input end of the synchronous switch is connected with the anode of the phase-controlled silicon controlled rectifier through a second resistor.

3. The 555 phased soft start current-limiting protection dc voltage regulator according to claim 1, wherein: the soft start control circuit comprises a soft start control tube and a soft start capacitor, wherein an emitting electrode of the soft start control tube is connected with a base electrode of the trigger control tube through a third resistor, a collecting electrode of the soft start control tube is connected with the ground, and the base electrode of the soft start control tube is opposite to the ground.

4. The 555 phased soft start current-limiting protection dc voltage regulator according to claim 1, wherein: the current-limiting protection circuit comprises a current-limiting protection control tube and a current-limiting sampling resistor, wherein one end of the current-limiting sampling resistor is connected with the cathode of the phase-control silicon controlled rectifier, the other end of the current-limiting sampling resistor is connected with the anode output end of the phase-control power supply, the collector of the current-limiting protection control tube is connected with the base of the soft start control tube, the emitter is connected with the ground, and the base is provided with a time-delay protection capacitor to.

5. The 555 phased soft start current-limiting protection dc voltage regulator according to claim 1, wherein: the ground end of the 555 time-base integrated circuit chip is connected with the cathode of the phase-controlled silicon controlled rectifier and the anode of the phase-controlled direct-current power supply, the threshold end of the 555 time-base integrated circuit chip is divided into three paths after being connected with the triggering end, the first path is connected with the positive power source end of the 555 time-base integrated circuit chip through a second delay capacitor, the second path is connected with the output tube of the synchronous switch, and the third path is connected with the ground end of the 555 time-base integrated circuit chip through a crystal diode, a triggering control tube and a fourth resistor.

6. The 555 phased soft start current-limiting protection dc voltage regulator according to claim 1, wherein: the trigger control circuit comprises a trigger control tube and a voltage stabilizing diode; the base electrode of the trigger control tube is divided into two paths after passing through the third resistor and the fifth resistor in sequence, one path is connected with the cathode of the phase-controlled direct-current power supply through the voltage stabilizing diode and the sixth resistor, and the other path is connected with the anode of the trigger circuit power supply through the seventh resistor, so that the trigger control circuit with the functions of reference voltage sampling, phase-controlled direct-current voltage sampling, comparing and amplifying is formed.

Technical Field

The invention belongs to the field of direct-current stabilized power supplies in electronic technology, and particularly relates to a 555 phase control soft start current-limiting protection direct-current stabilized power supply.

Background

The phase control trigger circuit of the existing phase control direct current stabilized voltage power supply is divided into two types, namely a discrete type and an integrated type.

The problems of poor reliability and stability, complex phase control circuit, high adjustment difficulty and high power consumption exist in the discrete type.

Modular integration, while better in performance, is expensive and relies heavily on imports. The existing phase-control direct current stabilized voltage supply can not meet the requirements of excellent performance and low price.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the 555 phase control soft start current limiting protection direct current stabilized power supply solves the problems of discrete reliability, poor stability and high integrated production cost of the phase control direct current stabilized power supply.

The invention adopts the following technical scheme for solving the technical problems:

a555 phase control soft start current-limiting protection direct current stabilized voltage power supply comprises a trigger, a phase control silicon controlled rectifier, a trigger synchronous switch, a time delay capacitor, a trigger control circuit, a phase control synchronous signal source, a trigger driving circuit, a soft start circuit, a current-limiting protection circuit and a trigger circuit power supply, wherein the trigger is a 555 time base integrated circuit chip and is used for generating a trigger pulse signal for controlling the conduction of the phase control silicon controlled rectifier;

the phase control silicon controlled rectifier plays a role of a contactless switch;

the trigger synchronous switch comprises an input tube and an output tube and is used for synchronizing the positive working voltage of the controllable silicon and a trigger pulse signal;

the trigger control circuit comprises a trigger control tube and a voltage stabilizing diode; the trigger delay angle and the conduction angle are controlled by controlling the charging time of the delay capacitor so as to realize the control of the output voltage of the delay capacitor;

the phase control synchronous signal source provides synchronous signals for the synchronous switch;

the trigger driving circuit amplifies the trigger current to drive the high-power silicon controlled rectifier to work;

the soft start control circuit comprises a soft start control tube and a soft start capacitor and is used for prolonging the start time of the phase control power supply;

the current-limiting protection circuit comprises a current-limiting protection control tube and a current-limiting sampling resistor and is used for limiting the output current of the phase control power supply and preventing overload and load short circuit;

the trigger circuit power supply provides stable working voltage for the trigger circuit.

The output end of the 555 time-base integrated circuit chip is connected with the input end of the trigger driving circuit through a first delay capacitor and a first resistor; the output end of the trigger driving circuit is connected with a control electrode of the phase-controlled silicon controlled rectifier; the input end of the synchronous switch is connected with the anode of the phase-controlled silicon controlled rectifier through a second resistor.

The soft start control circuit comprises a soft start control tube and a soft start capacitor, wherein an emitting electrode of the soft start control tube is connected with a base electrode of the trigger control tube through a third resistor, a collecting electrode of the soft start control tube is connected with the ground, and the base electrode of the soft start control tube is opposite to the ground.

The current-limiting protection circuit comprises a current-limiting protection control tube and a current-limiting sampling resistor, wherein one end of the current-limiting sampling resistor is connected with the cathode of the phase-control silicon controlled rectifier, the other end of the current-limiting sampling resistor is connected with the anode output end of the phase-control power supply, the collector of the current-limiting protection control tube is connected with the base of the soft start control tube, the emitter is connected with the ground, and the base is provided with a time-delay protection capacitor to.

The ground end of the 555 time-base integrated circuit chip is connected with the cathode of the phase-controlled silicon controlled rectifier and the anode of the phase-controlled direct-current power supply, the threshold end of the 555 time-base integrated circuit chip is divided into three paths after being connected with the triggering end, the first path is connected with the positive power source end of the 555 time-base integrated circuit chip through a second delay capacitor, the second path is connected with the output tube of the synchronous switch, and the third path is connected with the ground end of the 555 time-base integrated circuit chip through a crystal diode, a triggering control tube and a fourth resistor.

The trigger control circuit comprises a trigger control tube and a voltage stabilizing diode; the base electrode of the trigger control tube is divided into two paths after passing through the third resistor and the fifth resistor in sequence, one path is connected with the cathode of the phase-controlled direct-current power supply through the voltage stabilizing diode and the sixth resistor, and the other path is connected with the anode of the trigger circuit power supply through the seventh resistor, so that the trigger control circuit with the functions of reference voltage sampling, phase-controlled direct-current voltage sampling, comparing and amplifying is formed.

Compared with the prior art, the invention has the following beneficial effects:

1. the structure is relatively simple because complex discrete component circuits and singlechip control systems are avoided.

2. Because the logic conversion of the 555 chip only depends on the input ends 1/3Ue and 2/3Ue, and is unrelated to the variation fluctuation of the power supply voltage, the anti-interference capability is strong, and the working stability and the reliability are further improved.

3. Because the reference voltage circuit in the 555 chip is composed of 3 high-precision resistors, the voltage division precision is high, the parameter consistency is good, and the phase control circuit is produced without any debugging.

4. Because the ground end of the 555 chip is directly connected with the cathode of the phase-controlled silicon controlled rectifier, a trigger driving circuit, a soft start circuit and a current-limiting protection circuit of the phase-controlled silicon controlled rectifier become very simple.

5. Because simple structure, core component 555 chip low price, the cost of controlling trigger circuit mutually descends by a wide margin.

Drawings

FIG. 1 is a schematic circuit diagram of a 555 phase control soft start current limiting protection DC voltage stabilizing power supply of the invention.

FIG. 2 is a waveform diagram of the 555 phase control soft start current limiting protection DC voltage stabilizing power supply of the present invention.

Detailed Description

The structure and operation of the present invention will be further described with reference to the accompanying drawings.

A555 phase control soft start current-limiting protection direct current stabilized voltage power supply comprises a trigger, a phase control silicon controlled rectifier, a trigger synchronous switch, a time delay capacitor, a trigger control circuit, a phase control synchronous signal source, a trigger driving circuit, a soft start circuit, a current-limiting protection circuit and a trigger circuit power supply, wherein the trigger is a 555 time base integrated circuit chip and is used for generating a trigger pulse signal for controlling the conduction of the phase control silicon controlled rectifier; the phase control silicon controlled rectifier plays a role of a contactless switch; the trigger synchronous switch comprises an input tube and an output tube and is used for synchronizing the positive working voltage of the controllable silicon and a trigger pulse signal; the charging time of the delay capacitor determines the size of a trigger delay angle; the trigger control circuit comprises a trigger control tube and a voltage stabilizing diode, and controls a trigger delay angle and a conduction angle by controlling the charging time of the delay capacitor so as to realize the control of the output voltage of the delay capacitor; the phase control synchronous signal source provides synchronous signals for the synchronous switch; the trigger driving circuit amplifies the trigger current to drive the high-power silicon controlled rectifier to work; the soft start control circuit comprises a soft start control tube and a soft start capacitor and is used for prolonging the start time of the phase control power supply so as to adapt to the start requirement of a special load; the current-limiting protection circuit comprises a current-limiting protection control tube and a current-limiting sampling resistor and is used for limiting the output current of the phase control power supply and preventing overload and load short circuit; the trigger circuit power supply provides stable working voltage for the trigger circuit.

In the above constitution, the trigger synchronous switch and the trigger circuit power supply are the same as those of the prior art. The difference is that: the trigger adopts a 555 time-base integrated circuit chip with excellent performance and low price, and is specifically connected with a phase-controlled silicon controlled rectifier, a trigger synchronous switch, a time delay capacitor, a trigger control circuit, a phase-controlled synchronous signal source, a trigger driving circuit, a soft start circuit and a current-limiting protection circuit to form a unique time-base phase-controlled trigger circuit.

The ground end of the 555 time-base integrated circuit chip is connected with the cathode of the phase-controlled silicon controlled rectifier and the anode of the phase-controlled direct-current power supply, so that the cathode of the phase-controlled silicon controlled rectifier and the reference point ground of the 555 chip have the same potential;

the output end of the 555 time-base integrated circuit chip is connected with the input end of the trigger driving circuit through a first delay capacitor and a first resistor; the output end of the trigger driving circuit is connected with the control electrode of the phase-controlled silicon controlled rectifier to form a resistance-capacitance coupling trigger driving circuit;

the threshold end and the trigger end of the 555 time-base integrated circuit chip are connected and then divided into three paths, the first path is connected with the positive power source end of the 555 time-base integrated circuit chip through a second delay capacitor, the second path is connected with the output tube of the synchronous switch, the emitter of the output tube of the synchronous switch is connected with the positive power source end of the 555 chip, and the third path is connected with the ground end of the 555 chip through a crystal diode, a trigger control tube and a fourth resistor to form a synchronous charging and discharging delay trigger input loop.

The input end of the synchronous switch is connected with the anode of the phase-controlled silicon controlled rectifier through the second resistor, and a synchronous signal is directly obtained from the anode of the phase-controlled silicon controlled rectifier, so that a transformer for triggering the synchronous signal is omitted;

the trigger control circuit comprises a trigger control tube and a voltage stabilizing diode; the base electrode of the trigger control tube is divided into two paths after passing through the third resistor and the fifth resistor in sequence, one path is connected with the cathode of the phase-controlled direct-current power supply through the voltage stabilizing diode and the sixth resistor, and the other path is connected with the anode of the trigger circuit power supply through the seventh resistor, so that the trigger control circuit with the functions of reference voltage sampling, phase-controlled direct-current voltage sampling, comparing and amplifying is formed.

The soft start control circuit comprises a soft start control tube and a soft start capacitor, wherein an emitter of the soft start control tube is connected with a base electrode of the trigger control tube through a third resistor, a collector of the soft start control tube is connected with the ground, and the base electrode is opposite to the ground;

the current-limiting protection circuit comprises a current-limiting protection control tube and a current-limiting sampling resistor, wherein one end of the current-limiting sampling resistor is connected with the cathode of the phase-control silicon controlled rectifier, the other end of the current-limiting sampling resistor is connected with the anode output end of the phase-control power supply, the collector of the current-limiting protection control tube is connected with the base of the soft start control tube, the emitter is connected with the ground, and the base is provided with a time-delay protection capacitor to.