CN205657586U - Wide voltage input's controllable power supply circuit - Google Patents

Abstract

The utility model provides a wide voltage input's controllable power supply circuit which characterized in that: it includes turn -offs trigger level generating circuit (A) certainly, control signal conversion circuit (B), and voltage limiting switch circuit (C) and switching power supply circuit (D), output from turn -offing trigger level generating circuit (A) is connected with voltage limiting switch circuit (C) input, control signal conversion circuit (B) output be connected with voltage limiting switch circuit (C) input, voltage limiting switch circuit (C) output and switching power supply circuit's (D) input be connected. The utility model discloses adaptation wide region operating voltage, the product can not damage under the zero line connect the wrong condition with the live wire, and the circuit is small, has extremely low stand -by power consumption, has practiced thrift the energy.

Description

A Controllable Power Supply Circuit with Wide Voltage Input

technical field

The utility model belongs to the technical field of circuit breaker power utilization, and in particular relates to a controllable power supply circuit for wide voltage input of an electric operating mechanism of a circuit breaker.

Background technique

Miniature circuit breaker, referred to as MCB, is the most widely used terminal protection device in the electrical terminal distribution device. The electric operating mechanism of the circuit breaker is an accessory used for long-distance automatic opening and closing of the circuit breaker. With the development of smart grid construction, the requirements for the circuit breaker and the corresponding electric operating mechanism are getting higher and higher. In addition to the automatic opening and closing function of the operating mechanism, it is also required to have a wide range of operating voltage, small size, extremely low static power consumption, and a wide range of applicable temperatures. To solve the above problems, the size of the circuit board needs to be If it is made relatively large, the size of the entire circuit breaker will become larger, and the appearance of the product will deteriorate, which will consume space and is not conducive to actual use, or its operating voltage range will be limited. If the user accidentally connects the neutral line to a The live wire may cause the product to burn.

Utility model content

The purpose of this utility model is to provide a controllable power supply circuit for the wide voltage input of the electric operating mechanism of the circuit breaker in view of the technical defects of the existing electric operating mechanism of the circuit breaker that the operating voltage is narrow and the installation space is large, and it is suitable for Wide range of operating voltage, the product will not be damaged if the neutral wire and live wire are connected incorrectly, the circuit is small in size, has extremely low standby power consumption, and saves energy.

Technical solutions

In order to achieve the above technical purpose, a controllable power supply circuit with wide voltage input designed by the utility model is characterized in that it includes a self-shutoff trigger level generating circuit, a control signal conversion circuit, a voltage limiting switch circuit and a switching power supply circuit , the output end of the self-shutoff trigger level generation circuit is connected to the input end of the voltage limiting switch circuit, the output end of the control signal conversion circuit is connected to the input end of the voltage limiting switch circuit, and the voltage limiting switch circuit The output end is connected with the input end of the switching power supply circuit.

Further, the self-shutoff trigger level generating circuit includes a self-shutoff first resistor, a self-shutoff second resistor, a self-shutoff capacitor, a self-shutoff zener diode or a self-shutdown transient voltage suppression diode, the The first self-turn-off resistor, the second self-turn-off resistor and the self-turn-off capacitor are connected in series in sequence, and the self-turn-off voltage stabilizing diode or the self-turn-off transient voltage suppression diode is connected to both ends of the self-turn-off capacitor and connected in parallel with it.

Further, the voltage limiting switch circuit includes a first resistor of the voltage limiting switch, a second resistor of the voltage limiting switch, a Zener diode of the voltage limiting switch or a transient voltage suppression diode of the voltage limiting switch or a varistor of the voltage limiting switch. The first resistor of the voltage limiting switch is connected in series with the second resistor of the voltage limiting switch and connected in parallel with the first field effect transistor of the voltage limiting switch or the triode of the voltage limiting switch or the driving pole and the input pole of the insulated gate transistor of the voltage limiting switch. Two field effect transistors or voltage limiting switch triode or voltage limiting switch IGS and voltage limiting switch The first transient voltage suppression diode or voltage limiting switch Zener diode or varistor are connected in parallel with the first field effect transistor or triode Or the drive electrode of the insulated gate transistor is connected, the voltage limiting switch Zener diode is connected in series with the electrolytic capacitor of the voltage limiting switch and then connected in series with the output pole of the first field effect transistor of the voltage limiting switch, and the second instant of the voltage limiting switch The variable voltage suppression diode or the voltage limiting switch Zener diode or the voltage limiting switch varistor are respectively connected in parallel with the driving pole and the output pole of the first field effect transistor of the voltage limiting switch.

Further, the control signal converting circuit includes a signal converting first resistor, a signal converting second resistor, a signal converting third resistor, a signal converting fourth resistor, a signal converting triode or a field effect transistor or an insulated gate gate transistor, the The signal conversion first resistor is connected to the driving pole of the signal conversion triode or the field effect transistor or the insulated gate gate transistor, and the signal conversion second resistor is connected to the signal conversion triode or the field effect transistor or the driving pole of the insulated gate gate transistor. The output poles are connected in parallel, the signal conversion third resistor is connected to the input pole of the signal conversion triode or field effect transistor or the insulated gate gate transistor, and the signal conversion fourth resistor is connected to the signal conversion triode or field effect transistor or the insulated gate gate The input pole and the output pole of the transistor are connected in parallel.

Beneficial effect

The utility model provides a controllable power supply circuit for a wide voltage input of an electric operating mechanism of a circuit breaker, which is suitable for a wide range of operating voltages, and the product will not be damaged when the zero line and the live line are connected incorrectly. The circuit is small in size and extremely Low standby power consumption saves energy.

Description of drawings

Accompanying drawing 1 is the circuit schematic diagram of the utility model embodiment.

detailed description

Below in conjunction with accompanying drawing and embodiment, the utility model is described further.

Example

As shown in Figure 1, a controllable power supply circuit with wide voltage input is characterized in that it includes a self-shutoff trigger level generation circuit A, a control signal conversion circuit B, a voltage limiting switch circuit C and a switching power supply circuit D , the output end of the self-shutoff trigger level generating circuit A is connected to the input end of the voltage limiting switch circuit C, the output end of the control signal conversion circuit B is connected to the input end of the voltage limiting switch circuit C, and the The output terminal of the voltage limiting switch circuit C is connected with the input terminal of the switching power supply circuit D.

The self-shutoff trigger level generation circuit A includes a self-shutoff first resistor A_R1, a self-shutoff second resistor A_R2, a self-shutoff capacitor A_C, a self-shutoff zener diode A_D or a self-shutdown transient voltage suppression diode , the self-shutoff first resistor A_R1, the self-shutoff second resistor A_R2 and the self-shutoff capacitor A_C are connected in series in sequence, and the self-shutoff zener diode A_D or the self-shutdown transient voltage suppression diode is connected to the self-shutoff Both ends of the capacitor A_C are connected in parallel therewith.

The voltage limiting switch circuit C includes the first resistor C_R1 of the voltage limiting switch, the second resistor C_R2 of the voltage limiting switch, the voltage limiting switch Zener diode C_D or the transient voltage suppression diode of the voltage limiting switch or the varistor of the voltage limiting switch. The first resistor C_R1 of the voltage limiting switch and the second resistor C_R2 of the voltage limiting switch are connected in parallel with the drive pole and input pole of the first field effect transistor C_Q1 of the voltage limiting switch or the triode of the voltage limiting switch or the insulating gate transistor of the voltage limiting switch , the second field effect transistor C_Q2 of the voltage limiting switch or the triode of the voltage limiting switch or the IGS of the voltage limiting switch is connected in parallel with the first transient voltage suppression diode C_D1 of the voltage limiting switch or the Zener diode of the voltage limiting switch or the varistor The driving pole of the first field effect transistor C_Q1 or triode or insulated gate transistor is connected, and the voltage limiting switch Zener diode C_D is connected in series with the voltage limiting switch electrolytic capacitor C_C and then connected to the output pole of the first field effect transistor C_Q1 of the voltage limiting switch connected in series, the second transient voltage suppressor diode C_D2 of the voltage limiting switch or the voltage limiting switch zener diode or the varistor of the voltage limiting switch are respectively connected in parallel with the driving pole and the output pole of the first field effect transistor C_Q1 of the voltage limiting switch.

The control signal conversion circuit B includes a signal conversion first resistor B_R1, a signal conversion second resistor B_R2, a signal conversion third resistor B_R3, a signal conversion fourth resistor B_R4, a signal conversion triode B_D or a field effect transistor or an insulating gate gate Transistor, the signal conversion first resistor B_R1 is connected to the driving pole of the signal conversion triode or field effect transistor or insulated gate gate transistor, and the signal conversion second resistor B_R2 is connected to the signal conversion triode B_D or field effect transistor or insulated gate transistor The driving pole and the output pole of the gate transistor are connected in parallel, the third resistance B_R3 of the signal conversion is connected with the input pole of the signal conversion triode B_D or the field effect transistor or the insulated gate gate transistor, and the fourth resistance B_R4_ of the signal conversion is connected with the signal conversion The input pole and the output pole of the conversion triode B_D or the field effect transistor or the insulated gate gate transistor are connected in parallel.

In this embodiment, the output terminal of the self-shutdown trigger level generation circuit A is connected to the input terminal of the voltage limiting switch circuit C, and after a period of delay after the initial power-on of the bus bar, the self-shutoff trigger level generation circuit A generates a shutdown level, and the shutdown The voltage limiting switch circuit C is turned off, the voltage output is turned off, the circuit enters an extremely low static standby power consumption state, and the voltage limiting switch circuit and the switching power supply circuit do not work;

When the product needs to act, the control signal conversion circuit (B) receives the unlock signal from the control unit, the blocking level of the self-shutoff trigger level generation circuit A is released, and the voltage limiting switch circuit C works to limit the bus voltage. output to its output terminal after pressure;

C_Q1, C_D1, C_D2, C_R1, and C_R2 inside the voltage limiting switch circuit C form a voltage limiting switch. When the front-end input voltage is high, this circuit will drop the higher voltage part on C_Q1 to ensure that the output voltage of the voltage limiting switch circuit C is at Within the safe working range of the back-end circuit system, when the front-end output voltage is low, the circuit dynamically adjusts and releases all the voltage to the back-end circuit, thereby realizing a wide voltage range operation; at the same time, C_Q2 in this circuit receives a self-shutdown trigger The blocking level at the output end of the level generating circuit receives the blocking level and closes the output of the entire circuit during static standby, so as to ensure extremely low standby power consumption of the circuit system.

The input terminal of the switching power supply circuit D is connected to the output terminal of the voltage limiting switch circuit C. The switching power supply circuit D converts the high voltage into a low-amplitude voltage that the control and detection unit can withstand. The input voltage that the switching power supply circuit can withstand under reliable operation cannot exceed DC-380V, but its circuit is small in size and stable and reliable in operation. Cooperating with the front-end voltage limiting switch circuit C, it can reliably work at a bus voltage greater than DC-380V, realize expected functions, and miniaturize the product.

The utility model provides a controllable power supply circuit for a wide voltage input of an electric operating mechanism of a circuit breaker, which is suitable for a wide range of operating voltages, and the product will not be damaged when the zero line and the live line are connected incorrectly. The circuit is small in size and extremely Low standby power consumption saves energy.

Claims (4)

1. the controllable power supply circuit of a Width funtion input, it is characterised in that: it includes that automatic shutoff triggers electricity Flat generative circuit (A), control signal change-over circuit (B), pressure limit switch circuit (C) and switching power circuit (D), The outfan of described automatic shutoff triggering level generative circuit (A) is connected with pressure limit switch circuit (C) input, Described control signal change-over circuit (B) outfan is connected with pressure limit switch circuit (C) input, described Pressure limit switch circuit (C) outfan is connected with the input of switching power circuit (D).

The controllable power supply circuit of a kind of Width funtion the most as claimed in claim 1 input, it is characterised in that: Described automatic shutoff triggering level generative circuit (A) includes automatic shutoff the first resistance (A_R1), automatic shutoff the second electricity Resistance (A_R2), automatic shutoff electric capacity (A_C), automatic shutoff Zener diode (A_D) or the suppression of automatic shutoff transient voltage Diode, described automatic shutoff the first resistance (A_R1), automatic shutoff the second resistance (A_R2) and automatic shutoff electric capacity (A_C) it is sequentially connected in series, described automatic shutoff Zener diode (A_D) or automatic shutoff transient voltage suppressor pipe It is connected on automatic shutoff electric capacity (A_C) two ends connected in parallel.

The controllable power supply circuit of a kind of Width funtion the most as claimed in claim 1 input, it is characterised in that: Described pressure limit switch circuit (C) includes pressure limit switch the first resistance (C_R1), pressure limit switch the second resistance (C_R2), pressure limit switch Zener diode (C_D) or pressure limit switch transient voltage suppressor or pressure limiting are opened Closing varistor, described pressure limit switch the first resistance (C_R1) is connected with pressure limit switch the second resistance (C_R2) Afterwards with pressure limit switch the first field effect transistor (C_Q1) or pressure limit switch audion or pressure limit switch insulated gate gate pole Driving stage and the input pole of transistor are connected in parallel, pressure limit switch the second field effect transistor (C_Q2) or pressure limit switch Audion or pressure limit switch insulated gate gate transistors and pressure limit switch the first transient voltage suppressor (C_D1) with the first field effect transistor (C_Q1) or three or after pressure limit switch Zener diode or varistor parallel connection The driving stage of pole pipe or insulated gate gate transistors connects, described pressure limit switch Zener diode (C_D) and limit The electrochemical capacitor that compresses switch series connection (C_C) output stage with pressure limit switch the first field effect transistor (C_Q1) afterwards connect company Connect, described pressure limit switch the second transient voltage suppressor (C_D2) or pressure limit switch Zener diode or limit The varistor that compresses switch is in parallel with the driving stage of pressure limit switch the first field effect transistor (C_Q1) and output stage respectively Connect.

The controllable power supply circuit of a kind of Width funtion the most as claimed in claim 1 input, it is characterised in that: Described control signal change-over circuit (B) includes that signal changes the first resistance (B_R1), signal conversion the second electricity Resistance (B_R2), signal conversion the 3rd resistance (B_R3), signal conversion the 4th resistance B_R4, signal conversion three Pole pipe (B_D) or field effect transistor or insulated gate gate transistors, described signal change the first resistance (B_R1) with The driving stage of signal conversion audion or field effect transistor or insulated gate gate transistors is connected, described signal Change the second resistance (B_R2) and change audion (B_D) or field effect transistor or insulated gate gate transistors with signal Driving stage and output stage in parallel, described signal conversion the 3rd resistance (B_R3) and signal conversion audion (B_D) Or the input pole of field effect transistor or insulated gate gate transistors connects, described signal conversion the 4th resistance (B_R4_ With signal conversion audion (B_D) or the input pole of field effect transistor or insulated gate gate transistors and output stage also Connection.