CN218183010U

CN218183010U - Overload-proof current-limiting output circuit for breeze generator controller

Info

Publication number: CN218183010U
Application number: CN202220559667.5U
Authority: CN
Inventors: 龚新金
Original assignee: Guangzhou Saite New Energy Technology Development Co ltd
Current assignee: Guangzhou Saite New Energy Technology Development Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-12-30
Anticipated expiration: 2032-03-15

Abstract

The utility model discloses an overload protection current-limiting output circuit for gentle breeze generator controller, including DC power supply BAT1, DC power supply BAT1 both ends electric connection has triode Q1 and triode Q2, triode Q1's collecting electrode passes through resistance R4 and is connected with triode Q2's base, triode Q1's base passes through resistance R1 triode Q2's collecting electrode and connects, triode Q2's collecting electrode passes through resistance R3 ground connection, be connected with resistance R6 between triode Q2's collecting electrode and the projecting pole, the last hookup of resistance R3 has electric capacity C1, electric capacity C1 goes up and has hookup resistance R5 and LED lamp L1, resistance R5 and LED lamp L1 establish ties, the last hookup of resistance R5 and LED lamp L1 has switch K1. The utility model has the advantages that: the overcurrent or overload prevention can be quickly realized without a current sensor, a voltage sensor or a signal transmission to a protection controller or the protection controller for executing the opening or closing operation of a specific mechanical or electromagnetic switch.

Description

Overload-proof current-limiting output circuit for breeze generator controller

Technical Field

The utility model relates to an output circuit technical field specifically indicates an overload protection current-limiting output circuit for gentle breeze generator controller.

Background

The wind driven generator is one kind of clean energy equipment without pollution and capable of producing electric power with wind energy, and is one wind driven generator with blades to rotate to drive the electromagnetic induction generator to produce electric power. The starting wind speed of the traditional wind driven generator is generally not lower than 3 grades of wind, and the rated operation wind speed is generally required to be 5-6 grades of wind or above. Therefore, certain requirements are imposed on the use environment of the wind driven generator, and the range of the applicable area of the wind driven generator is quite limited. The traditional wind driven generator is generally large-scale equipment, which is only suitable for areas with strong wind all the year round, and the large-scale wind driven generator does not have an armed place for wide areas with small wind or breeze or rural household residents. Under the blowing of small wind or breeze, the blades of the wind driven generator can not rotate to generate electric power, so that the large wind driven generator can not provide substantial electric power support for vast rural areas with small wind power.

Wind in nature constantly changes, always is in an unstable state, and the fan blade rotational speed generally changes along with the size of wind-force constantly, also leads to the rotational speed of generator also constantly changing, and its voltage that sends is suddenly high and suddenly low, and the electric current is also very unstable, and output power is big time spent, and average efficiency is lower, so, the power that traditional small-size aerogenerator provided can not directly supply to use with electrical equipment, does not say more directly and is incorporated into the power networks the electricity generation. When the existing small-sized wind driven generator is used for electricity, the storage battery is generally charged firstly, and then the storage battery supplies power to an external load. For example, wind-solar hybrid streetlamps are generally powered by 24V-48V batteries. Engineering constructors often can be carelessly with positive negative pole short circuit when carrying out electrical connection, lead to the battery short circuit, and such maloperation can cause the site operation personnel injury, also can shorten the life of battery, also can burn out street lamp equipment.

At present, most of direct current circuit short-circuit protection or overload prevention methods are short-circuit or detect current exceeding a certain rated current-carrying capacity value by various sensors, and then realize overcurrent or overload protection by switching off a certain circuit, belonging to remedial measures after an overload and overcurrent event. If the current of the original circuit is large or the protection speed is not high enough, there is still a small probability that the protection is not timely or fails.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to the above-mentioned problem, provide one kind and need not current sensor, need not voltage sensor, need not transmission signal and give the protection control ware, need not the protection control ware and carry out specific mechanical or electromagnetic switch's disconnection or closed operation, can realize fast overflowing or the overload protection overload current-limiting output circuit who is used for little aerogenerator controller of transshipping prevention.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides an overload current-limiting output circuit that prevents for gentle breeze generator controller, includes DC power supply BAT1, DC power supply BAT1 both ends electric connection has triode Q1 and triode Q2, DC power supply BAT1 is connected with triode Q1's projecting pole through resistance R2, DC power supply BAT1 is connected with triode Q2's projecting pole, triode Q1's collecting electrode is connected with triode Q2's base through resistance R4, triode Q1's base is connected through resistance R1 triode Q2's collecting electrode, triode Q2's collecting electrode passes through resistance R3 ground connection, be connected with resistance R6 between triode Q2's collecting electrode and the projecting pole, the last parallel connection of resistance R3 has electric capacity C1, the last parallel connection of electric capacity C1 has resistance R5 and LED lamp L1, resistance R5 and LED lamp L1 establish ties, the last parallel connection of resistance R5 and the LED lamp L1 has switch K1.

Compared with the prior art, the utility model the advantage lie in: according to the overload-proof current-limiting output circuit for the controller of the breeze generator, when the circuit normally runs, the main circuit leads the positive electrode of a battery to pass through Q2, R5 and an LED lamp L1 and then return to the negative electrode of the battery, when an abnormal accident occurs and the R5 and the L1 are short-circuited, the current of a K1 path suddenly rises, the voltage at two ends of a capacitor C1 is suddenly reduced, the triode Q1 is caused to be closed, the triode Q2 is further closed in a linkage mode, the main circuit is forced to pass through a current-limiting resistor R6 and then returns to the negative electrode of the battery, and the current-limiting resistor R6 is far larger than a circuit sensitivity adjusting resistor R5, so that the current flowing through a test switch K1 is very small and is below a milliampere level, and the switching speed of the triode is very fast and can reach a us level, so that the overload-proof current can be switched to a circuit with a large resistance in time at a starting stage when the current just begins to rise, the purpose of preventing large current generation is achieved, and the overload protection and the short-circuit is also achieved;

when the short-circuit fault or the overload fault is relieved once, the voltage of the capacitor C1 end rises again, the triode Q1 is opened again, the triode Q2 is opened again due to linkage, the main circuit is switched to flow through the triode Q2 with small resistance, the resistor R5 and the LED lamp L1 loop again, namely the circuit is recovered to the previous state, and the circuit switching in the process can be automatically finished and controlled without other switches or sensors or a controller for sending specific instructions;

the circuit sensitivity adjusting resistors R3 and R5 are adjusted, a circuit state is simulated on circuit software, and a group of optimal resistance values of R3 and R5 can be obtained, so that the current flowing through the LED lamp L1 is the maximum in the circuit state, meanwhile, when the switch K1 is closed, namely the current rising edge at the beginning of short circuit occurs is on the way, the main circuit is closed by the triode Q1 and the triode Q2 in a linkage mode, and the short circuit current is extremely small and less than 1 milliampere;

when the main circuit is disconnected, the triode Q1 and the triode Q2 are also closed in a linkage manner, so that an electrode of the originally connected load can be prevented from contacting other electrical equipment, and unnecessary electrical accidents can be prevented.

As an improvement, the triode Q1 is NPN type, and the triode Q2 is PNP type.

As an improvement, the voltage of the dc power supply BAT1 is 24V.

Drawings

Fig. 1 is a circuit diagram of an overload protection and current limiting output circuit for a controller of a wind turbine according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With reference to fig. 1, an overload prevention current-limiting output circuit for a micro-wind generator controller comprises a direct-current power supply BAT1, two ends of the direct-current power supply BAT1 are electrically connected with a triode Q1 and a triode Q2, the direct-current power supply BAT1 is connected with an emitting electrode of the triode Q1 through a resistor R2, the direct-current power supply BAT1 is connected with an emitting electrode of the triode Q2, a collecting electrode of the triode Q1 is connected with a base electrode of the triode Q2 through a resistor R4, the base electrode of the triode Q1 is connected with a collecting electrode of the triode Q2 through a resistor R1, a collecting electrode of the triode Q2 is grounded through a resistor R3, a resistor R6 is connected between the collecting electrode and the emitting electrode of the triode Q2, a capacitor C1 is connected to the resistor R3 in parallel, a resistor R5 and an LED lamp L1 are connected to the capacitor C1 in parallel, the resistor R5 is connected with the LED lamp L1 in series, and a switch K1 is connected to the resistor R5 and the LED lamp L1 in parallel.

According to the overload-proof current-limiting output circuit for the controller of the breeze generator, when the circuit normally runs, the main circuit leads the positive electrode of a battery to pass through Q2, R5 and an LED lamp L1 and then return to the negative electrode of the battery, when an abnormal accident occurs and the R5 and the L1 are short-circuited, the current of a K1 path suddenly rises, the voltage at two ends of a capacitor C1 is suddenly reduced, the triode Q1 is caused to be closed, the triode Q2 is further closed in a linkage mode, the main circuit is forced to pass through a current-limiting resistor R6 and then returns to the negative electrode of the battery, and the current-limiting resistor R6 is far larger than a circuit sensitivity adjusting resistor R5, so that the current flowing through a test switch K1 is very small and is below a milliampere level, and the switching speed of the triode is very fast and can reach a us level, so that the overload-proof current can be switched to a circuit with a large resistance in time at a starting stage when the current just begins to rise, the purpose of preventing large current generation is achieved, and the overload protection and the short-circuit is also achieved;

when the main circuit is disconnected, the triode Q1 and the triode Q2 can be closed in a linkage mode, and therefore unnecessary electrical accidents caused by the fact that one electrode of the originally connected load is in contact with other electrical equipment can be prevented.

The triodes Q1 and Q2 are general PNP and NPN triodes, and can select proper models according to actual current and voltage of the circuit.

The LED lamp L1 can be replaced by a battery, a capacitor, an inductor and a resistor, and the effect of the circuit is not influenced.

The switch K1 is only for testing purposes and may not be considered in an actual circuit.

The present invention has been described in connection with the embodiments thereof, and the description is not intended to be limiting, and the embodiments shown in the drawings are only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. An overload prevention current-limiting output circuit for a controller of a breeze generator comprises a direct current power supply BAT1 and is characterized in that: DC power supply BAT1 both ends electric connection has triode Q1 and triode Q2, DC power supply BAT1 passes through resistance R2 and is connected with triode Q1's projecting pole, DC power supply BAT1 is connected with triode Q2's projecting pole, triode Q1's collecting electrode passes through resistance R4 and is connected with triode Q2's base, triode Q1's base passes through resistance R1 triode Q2's collecting electrode and is connected, triode Q2's collecting electrode passes through resistance R3 ground connection, be connected with resistance R6 between triode Q2's collecting electrode and the projecting pole, the last parallel connection of resistance R3 has electric capacity C1, the last parallel connection of electric capacity C1 has resistance R5 and LED lamp L1, resistance R5 and LED lamp L1 establish ties, the last parallel connection of resistance R5 and the LED lamp L1 has switch K1.

2. An overload and current limiting output circuit for a controller of a wind turbine generator as claimed in claim 1, wherein: the triode Q1 is NPN type, and the triode Q2 is PNP type.

3. An overload and current limiting output circuit for a controller of a wind turbine generator as claimed in claim 1, wherein: the voltage of the dc power supply BAT1 is 24V.