CN210327377U

CN210327377U - Starting circuit and inverter circuit

Info

Publication number: CN210327377U
Application number: CN201921347368.XU
Authority: CN
Inventors: 杜杰德; 綦红军; 覃美票; 谢剑标; 罗焕均; 王林; 梁嘉永
Original assignee: Foshan Unipower Electronic Co ltd
Current assignee: Foshan Unipower Electronic Co ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-04-14
Anticipated expiration: 2029-08-19

Abstract

The utility model discloses a start circuit, including direct current voltage stabilizing module and start module, direct current voltage stabilizing module includes electric capacity C1, step-down chip and peripheral circuit, the step-down chip disposes feeder ear and ground wire end, electric capacity C1's both ends are connected with the feeder ear and the ground wire end of step-down chip respectively, the ground wire end ground connection of step-down chip, start module is connected with electric capacity C1, start module is used for the increase to electric capacity C1's charging current. The utility model discloses a direct current voltage stabilization module carries out the step-down operation with DC power supply output's voltage and supplies power in order to realize the intelligent chip of output PWM control signal among DC-DC converting circuit and the DC-AC converting circuit among the inverter circuit, utilizes the start module increase to electric capacity C1's charging current, makes the speed that electric capacity C1 both ends voltage promoted accelerate to realize the quick start-up of step-down chip, finally realize inverter circuit's quick start-up function.

Description

Starting circuit and inverter circuit

Technical Field

The utility model relates to an electronic circuit technical field, more specifically say and relate to a start circuit and use this start circuit's inverter circuit.

Background

The inverter circuit converts direct current with a certain amplitude into alternating current with a certain amplitude and a certain frequency so as to supply power to electric equipment. The existing inverter circuit mainly comprises the following processes of firstly converting direct current into high-frequency low-voltage alternating current, then converting the high-frequency low-voltage alternating current into high-frequency high-voltage alternating current, then converting the high-frequency high-voltage alternating current into high-voltage direct current, and finally converting the high-voltage direct current into alternating current with specific frequency according to the requirement.

In an inverter circuit in the prior art, an intelligent chip is generally required to output a PWM control signal, so as to convert a direct current into a high-frequency alternating current and convert the direct current into an alternating current with a specific frequency. Because the PWM control signal needs to be generated by the smart chip, before the inverter circuit outputs the ac power with the characteristic frequency, the power supply operation needs to be performed on the smart chip first, which requires the power supply operation of the power-on circuit to the smart chip. At present, the traditional inverter circuit is slow in starting time, and the main reason is that a starting circuit structure in the inverter circuit is poor, and the inverter circuit is difficult to realize the quick starting function.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: a power-on circuit and an inverter circuit using the same are provided.

The utility model provides a solution of its technical problem is:

a boot circuit, comprising:

the direct current voltage stabilizing module is used for carrying out voltage reduction operation on input direct current voltage with a certain amplitude, converting the input direct current voltage into direct current voltage with another amplitude and outputting the direct current voltage;

the starting module is used for transmitting starting current to the direct current voltage stabilizing module;

the direct current voltage stabilizing module comprises a capacitor C1, a voltage reducing chip and a peripheral circuit thereof, wherein the voltage reducing chip is provided with a power supply end and a ground wire end, two ends of the capacitor C1 are respectively connected with the power supply end and the ground wire end of the voltage reducing chip, the ground wire end of the voltage reducing chip is grounded, the starting module is connected with the capacitor C1, and the starting module is used for increasing the charging current of the capacitor C1.

As a further improvement of the above technical solution, the starting module includes a resistor R1, a resistor R2, a transistor Q1, a resistor R3, a resistor R4, a transistor Q2, a capacitor C2, a resistor R5, and a transistor Q3, the resistor R1 and the resistor R2 are connected in series between a power supply terminal and a ground terminal, a base and an emitter of the transistor Q1 are respectively connected to two terminals of the resistor R1, a base of the transistor Q1 is connected to a connection point between the resistor R1 and the resistor R2, a collector of the transistor Q1 is connected to the ground terminal through the resistor R3 and the resistor R4 connected in series, a base of the transistor Q2 is connected to a connection point between the resistor R3 and the resistor R4, an emitter of the transistor Q2 is connected to the ground terminal, a collector of the transistor Q2 is connected to the base of the transistor Q3 through the resistor R5, two terminals of the capacitor C2 are respectively connected to the emitter of the transistor Q3 and, the emitter of the transistor Q3 is connected to the emitter of the transistor Q1, and the collector of the transistor Q3 is connected to ground through a capacitor C1.

As a further improvement of the above technical solution, the power-on circuit further includes an auxiliary power-on module, the auxiliary power-on module is connected to the starting module, and the auxiliary power-on module is configured to control the starting module to switch on the power-on loop according to the received external control signal.

As a further improvement of the above technical solution, the auxiliary power-on module includes a resistor R6, a resistor R7, and a transistor Q4, the auxiliary power-on module is provided with a signal input end for receiving an external control signal, the signal input end is connected to a base of the transistor Q4 through the resistor R6, two ends of the resistor R7 are respectively connected to a base and an emitter of the transistor Q4, the emitter of the transistor Q4 is connected to ground, and a collector of the transistor Q4 is connected to the power-on module.

As a further improvement of the technical scheme, the model of the pressure reduction chip is PL 8322.

The utility model discloses still disclose an inverter circuit simultaneously, including DC-DC converting circuit, DC-AC converting circuit and foretell start circuit, DC-DC converting circuit is used for converting the low voltage direct current of input into high frequency low voltage alternating current earlier, converts high frequency low voltage alternating current into high frequency high voltage alternating current again, converts high frequency high voltage alternating current into high voltage direct current at last, DC-AC converting circuit is used for converting high voltage direct current into specific frequency's high voltage alternating current, DC-DC converting circuit is connected with DC-AC converting circuit, start circuit is connected with DC-DC converting circuit and DC-AC converting circuit respectively.

The utility model has the advantages that: the utility model discloses a direct current voltage stabilization module carries out the step-down operation in order to realize supplying power to DC-DC converting circuit and DC-AC converting circuit in the inverter circuit in the intelligent chip of output PWM control signal, utilizes the start module increase to electric capacity C1's charging current, makes the speed of electric capacity C1 both ends voltage promotion accelerate to realize the quick start-up of step-down chip, finally realize inverter circuit's quick start-up function.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The conception, specific structure, and technical effects of the present application will be described clearly and completely with reference to the accompanying drawings and embodiments, so that the purpose, features, and effects of the present application can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts based on the embodiments of the present application belong to the protection scope of the present application. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other. Finally, it should be noted that the terms "center, upper, lower, left, right, vertical, horizontal, inner, outer" and the like as used herein refer to an orientation or positional relationship based on the drawings, which is only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

Referring to fig. 1, the present application discloses a switching circuit, where the starting-up circuit is used to implement a fast start function of an inverter circuit, and a first embodiment of the switching circuit includes:

Specifically, this embodiment carries out the step-down operation with the voltage of outside direct current power output through direct current voltage stabilization module in order to realize supplying power to DC-DC converting circuit among the inverter circuit and the intelligent chip of output PWM control signal among the DC-AC converting circuit, utilizes the increase of start module to electric capacity C1's charging current, makes the speed that electric capacity C1 both ends voltage promoted accelerate to realize the quick start of step-down chip, finally realize inverter circuit's quick start function.

Further as a preferred implementation, in this embodiment, the starting module includes a resistor R1, a resistor R2, a PNP transistor Q1, a resistor R3, a resistor R4, an NPN transistor Q2, a capacitor C2, a resistor R5, and a PNP transistor Q3, the resistor R1 and the resistor R2 are connected in series between a power supply terminal and a ground terminal, the base and the emitter of the transistor Q1 are connected to two ends of the resistor R1, respectively, the base of the transistor Q1 is connected to a connection point between the resistor R1 and the resistor R2, the collector of the transistor Q2 is connected to the ground terminal through the resistor R2 and the resistor R2 connected in series, the base of the transistor Q2 is connected to a connection point between the resistor R2 and the resistor R2, the emitter of the transistor Q2 is connected to the ground terminal, the collector of the transistor Q2 is connected to the base of the transistor Q2 through the resistor R2, two ends of the capacitor C2 are connected to the base of the transistor Q2, the emitter of the transistor Q3 is connected to the emitter of the transistor Q1, and the collector of the transistor Q3 is connected to ground through a capacitor C1. Specifically, the transistor Q1, the transistor Q2, and the transistor Q3 are provided to increase the charging current to the capacitor C1.

As a preferred implementation manner, in this embodiment, the boot circuit further includes an auxiliary boot module, the auxiliary boot module is connected to the start module, and the auxiliary boot module is configured to control the start module to switch on the power-on loop according to the received external control signal. In the practical application process, the switch element SW is arranged in the starting module to realize the manual starting function, in this embodiment, the switching element SW is used to realize the starting function of the inverter circuit, and an auxiliary starting module is additionally arranged to realize the starting of the inverter circuit.

Specifically, in this embodiment, the auxiliary power-on module includes a resistor R6, a resistor R7, and an NPN transistor Q4, the auxiliary power-on module is configured to receive a signal input end of an external control signal, the signal input end is connected to a base of the transistor Q4 through a resistor R6, two ends of the resistor R7 are respectively connected to a base and an emitter of the transistor Q4, the emitter of the transistor Q4 is connected to ground, and a collector of the transistor Q4 is connected to the start-up module, where on and off states of a transistor Q4 in the auxiliary power-on module are controlled by the external control signal. More specifically, the transistor Q4 in this embodiment is used to realize the connection between the resistor R2 and the ground.

Further, in this embodiment, the type of the buck chip is PL8322, the buck chip is a synchronous rectification buck switching converter with upper and lower MOS transistors integrated therein, and a cycle-by-cycle peak current control mode is adopted in the buck chip, so that the buck chip can realize fast dynamic response.

The application also discloses an inverter circuit, including DC-DC converting circuit, DC-AC converting circuit and foretell start circuit, DC-DC converting circuit is used for converting the low voltage direct current of input into high frequency low voltage alternating current earlier, converts high frequency low voltage alternating current into high frequency high voltage alternating current again, converts high frequency high voltage alternating current into high voltage direct current finally, DC-AC converting circuit is used for converting high voltage direct current into the high voltage alternating current of specific frequency, DC-DC converting circuit is connected with DC-AC converting circuit, start circuit is connected with DC-DC converting circuit and DC-AC converting circuit respectively.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A boot circuit, comprising:

the direct current voltage stabilizing module is used for carrying out voltage reduction operation on the input direct current voltage and converting the direct current voltage into direct current voltage with another amplitude value for output;

2. A power-on circuit as claimed in claim 1, wherein: the starting module comprises a resistor R1, a resistor R2, a transistor Q1, a resistor R3, a resistor R4, a transistor Q2, a capacitor C2, a resistor R5 and a transistor Q3, wherein the resistor R1 and the resistor R2 are connected between a power supply end and a ground end in series, a base and an emitter of the transistor Q1 are respectively connected with two ends of the resistor R1, a base of the transistor Q1 is connected with a connection point between the resistor R1 and the resistor R2, a collector of the transistor Q1 is connected with the ground end through the resistor R3 and the resistor R4 which are connected in series, a base of the transistor Q2 is connected with a connection point between the resistor R3 and the resistor R4, an emitter of the transistor Q2 is connected with the ground end, a collector of the transistor Q2 is connected with a base of the transistor Q3 through the resistor R5, two ends of the capacitor C2 are respectively connected with an emitter of the transistor Q3, an emitter of the transistor Q3 is connected with an emitter 1, the collector of the transistor Q3 is connected to ground through a capacitor C1.

3. A power-on circuit as claimed in claim 1, wherein: the starting device also comprises an auxiliary starting module, wherein the auxiliary starting module is connected with the starting module and is used for controlling the starting module to be connected with the power-on loop according to the received external control signal.

4. A power-on circuit as claimed in claim 3, wherein: the auxiliary power-on module comprises a resistor R6, a resistor R7 and a triode Q4, the auxiliary power-on module is provided with a signal input end used for receiving an external control signal, the signal input end is connected with the base electrode of the triode Q4 through a resistor R6, two ends of the resistor R7 are respectively connected with the base electrode and the emitting electrode of the triode Q4, the emitting electrode of the triode Q4 is connected with the ground end, and the collector electrode of the triode Q4 is connected with the starting module.

5. A power-on circuit as claimed in claim 1, wherein: the model of the pressure reduction chip is PL 8322.

6. An inverter circuit comprising a DC-DC conversion circuit, a DC-AC conversion circuit, and the power-on circuit of any one of claims 1 to 5, the DC-DC conversion circuit being connected to the DC-AC conversion circuit, and the power-on circuit being connected to the DC-DC conversion circuit and the DC-AC conversion circuit, respectively.