CN210536520U - Intelligent alternating current voltage reduction conversion circuit - Google Patents
Intelligent alternating current voltage reduction conversion circuit Download PDFInfo
- Publication number
- CN210536520U CN210536520U CN201920939755.6U CN201920939755U CN210536520U CN 210536520 U CN210536520 U CN 210536520U CN 201920939755 U CN201920939755 U CN 201920939755U CN 210536520 U CN210536520 U CN 210536520U
- Authority
- CN
- China
- Prior art keywords
- circuit
- direct current
- voltage
- alternating current
- transistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses an intelligent AC step-down converting circuit, which comprises an AC/DC converting circuit, a DC step-down circuit, a DC/AC converting circuit, a DC/AC driving circuit and a main control circuit, wherein the AC/DC converting circuit is used for converting input AC into first high-voltage DC; the direct current voltage reduction circuit is connected with the alternating current-direct current conversion circuit; the direct current and alternating current conversion circuit is connected with the direct current voltage reduction circuit; the direct current and alternating current driving circuit is connected with the direct current and alternating current conversion circuit; the main control circuit is respectively connected with the direct current voltage reduction circuit and the direct current/alternating current driving circuit and is used for outputting a voltage reduction control signal to drive the direct current voltage reduction circuit to reduce the voltage of the first high-voltage direct current so as to output a second high-voltage direct current; and outputting the direct current-alternating current conversion signal to drive the direct current-alternating current conversion circuit to convert the second high-voltage direct current into the output alternating current through the direct current-alternating current drive circuit, wherein the whole circuit is relatively simple, the manufacturing cost is low, and the failure rate of the circuit is low.
Description
Technical Field
The utility model relates to a power technical field especially relates to an intelligence exchanges step-down converting circuit.
Background
The voltage conversion circuit is a part of a circuit for providing power supply for the electric equipment, and mainly comprises an alternating current conversion circuit and a direct current conversion circuit. Because the voltage of the power supply in different regions and different countries may be different, and the rated voltage of the same electric equipment is the same, the electric equipment cannot be directly applied to be connected to the power supplies in different countries, and generally needs to be converted through a voltage conversion device.
The existing ac power conversion device mainly converts the input ac power into dc power, then reduces the dc power, and then converts the reduced dc power into another fixed power voltage, for example, converts the input 220V ac power into 110V ac power after serial conversion, so as to adapt to power supplies such as the european standard and the U.S. standard. The existing alternating current conversion device has relatively complex integral circuit, high manufacturing cost and high circuit failure rate.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide an intelligent ac step-down converting circuit.
In order to achieve the above object, according to the utility model discloses an intelligence exchanges step-down converting circuit, intelligence exchanges step-down converting circuit includes:
the alternating current-direct current conversion circuit is used for converting input alternating current into first high-voltage direct current;
the direct current voltage reduction circuit is connected with the alternating current-direct current conversion circuit;
the direct current-alternating current conversion circuit is connected with the direct current voltage reduction circuit;
the direct current and alternating current driving circuit is connected with the direct current and alternating current conversion circuit;
the main control circuit is respectively connected with the direct current voltage reduction circuit and the direct current and alternating current driving circuit and is used for outputting a voltage reduction control signal to drive the direct current voltage reduction circuit to reduce the first high-voltage direct current so as to output a second high-voltage direct current; and outputting a direct current-to-alternating current conversion signal so as to drive the direct current-to-alternating current conversion circuit to convert the second high-voltage direct current into output alternating current through the direct current-to-alternating current driving circuit.
Further, according to an embodiment of the present invention, the direct current to alternating current conversion includes:
the rectification filter circuit is connected with the direct current voltage reduction circuit and is used for rectifying and converting input alternating current into the first high-voltage direct current;
and the direct current conversion circuit is connected with the rectification filter circuit and is used for converting the first high-voltage direct current into a first low-voltage direct current.
Further, according to the utility model discloses an embodiment, intelligence exchanges step-down converting circuit still includes the USB circuit, the USB circuit with direct current converting circuit connects.
Further, according to the utility model discloses an embodiment, the USB circuit includes first USB circuit and second USB circuit, first USB circuit and second USB circuit respectively with direct current converting circuit connects.
Further, according to an embodiment of the present invention, the intelligent ac step-down converting circuit further includes a second voltage detecting circuit, and the second voltage detecting circuit is connected to the dc step-down circuit and the main control circuit, respectively, for detecting the voltage of the second high voltage dc;
or the second voltage detection circuit is respectively connected with the direct current-alternating current conversion circuit and the main control circuit and is used for detecting the voltage of the output alternating current.
Further, according to an embodiment of the present invention, the intelligent ac step-down converting circuit further includes an overload detecting circuit, and the overload detecting circuit is connected to the dc-ac converting circuit and the main control circuit, respectively, and is configured to detect an overload of the output ac power;
or the overload detection circuit is connected with the direct current voltage reduction circuit and the main control circuit and is used for detecting the overload of the output alternating current.
Further, according to the utility model discloses an embodiment, intelligence exchanges step-down converting circuit still includes temperature detect circuit, temperature detect circuit with master control circuit connects.
Further, according to the utility model discloses an embodiment, intelligence exchanges step-down converting circuit still includes fan control circuit, fan control circuit with master control circuit connects for according to temperature detection value, the slew velocity of control fan.
Further, according to the utility model discloses an embodiment, intelligence exchanges step-down converting circuit still includes the auxiliary power supply circuit, the auxiliary power supply circuit with alternating current-direct current converting circuit connects, is used for with the first low pressure alternating current of alternating current-direct current converting circuit output converts second low pressure direct current and third low pressure direct current, second low pressure direct current does direct current drive circuit power supply, third low pressure direct current does the master control circuit power supply.
Further, according to an embodiment of the present invention, the dc/ac driving circuit includes a first driving circuit, and the first driving circuit includes:
the charging circuit comprises a diode D2 and a capacitor C22, wherein the anode of the diode D2 is connected with a first power supply voltage, the cathode of the diode D2 is connected with one end of the capacitor C22, the other end of the capacitor C22 is connected with the common end of an upper bridge transistor Q4 and a lower bridge transistor Q6 of the direct-alternating current conversion circuit, and the charging circuit is used for charging the capacitor C22 through the first power supply voltage so as to provide a second power supply voltage through the capacitor C22;
a lower tube driving circuit, which includes a first transistor Q8, a base of the first transistor Q8 is connected to a signal output terminal of a main control circuit, an emitter of the first transistor Q8 is connected to the reference ground, a collector of the first transistor Q8 is connected to an output terminal of the first power supply voltage through a first resistor R54, and a collector of the first transistor Q8 is further connected to a controlled terminal of a lower bridge transistor Q6 of a dc-ac conversion circuit, for driving the lower bridge transistor Q6 of the dc-ac conversion circuit to be turned on or off;
the upper tube driving circuit comprises a second transistor Q9, the base of the second transistor Q9 is connected with the collector of the first transistor Q8, the collector of the second transistor Q9 is connected with the common end of the diode D2 and the capacitor C22 through a second resistor R52, the emitter of the second transistor Q9 is connected with the reference ground, the collector of the second transistor Q9 is further connected with the controlled end of an upper bridge transistor Q4 of the direct-current and alternating-current conversion circuit, and the second supply voltage output by the capacitor C22 is used for conducting or cutting off driving on the upper bridge transistor Q4 of the direct-current and alternating-current conversion circuit.
The embodiment of the utility model provides an intelligent AC step-down converting circuit is used for converting the input AC into the first high voltage DC through the AC-DC converting circuit; the direct current voltage reduction circuit is connected with the alternating current-direct current conversion circuit; the direct current and alternating current conversion circuit is connected with the direct current voltage reduction circuit; the direct current and alternating current driving circuit is connected with the direct current and alternating current conversion circuit; the main control circuit is respectively connected with the direct current voltage reduction circuit and the direct current-alternating current driving circuit and is used for outputting a voltage reduction control signal to drive the direct current voltage reduction circuit to reduce the first high-voltage direct current so as to output a second high-voltage direct current; and outputting a direct current-to-alternating current conversion signal so as to drive the direct current-to-alternating current conversion circuit to convert the second high-voltage direct current into output alternating current through the direct current-to-alternating current driving circuit. The whole circuit is relatively simple, the manufacturing cost is low, and the failure rate of the circuit is low.
In addition, the voltage of the alternating current output end is detected through the second voltage detection circuit, so that the voltage stability of the output alternating current is ensured, and a voltage feedback circuit of the alternating current output end is reduced; the overload detection of the output alternating current is carried out through the overload detection circuit, so that the overload detection of the input end is reduced; the direct current and alternating current driving circuit simplifies the complex design of the driving circuit, so that the whole circuit is simpler.
Drawings
Fig. 1 is a block diagram of an intelligent ac step-down conversion circuit provided in an embodiment of the present invention;
fig. 2 is a block diagram of another intelligent ac step-down converting circuit according to an embodiment of the present invention;
fig. 3 is a block diagram of another intelligent ac step-down converting circuit according to an embodiment of the present invention;
fig. 4 is a block diagram of another intelligent ac step-down converting circuit according to an embodiment of the present invention;
fig. 5 is a block diagram of another intelligent ac step-down converting circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a dc step-down circuit, a dc-ac conversion circuit and an overload detection circuit provided in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an ac/dc driving circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a voltage detection circuit, a main control circuit, a temperature detection circuit and a fan control circuit provided in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an ac-dc conversion circuit provided in an embodiment of the present invention;
fig. 10 is a schematic diagram of a USB circuit structure according to an embodiment of the present invention;
fig. 11 is a schematic diagram of an auxiliary power circuit according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a state indicating circuit according to an embodiment of the present invention.
Reference numerals:
an AC-DC conversion circuit 10;
a rectifying-filtering circuit 101;
a direct current conversion circuit 102;
a dc voltage step-down circuit 20;
a direct-alternating current conversion circuit 30;
an AC output interface 40;
a direct current/alternating current drive circuit 50;
a first drive circuit 501;
a second drive circuit 502;
a main control circuit 60;
a voltage detection circuit 70;
an AC input interface 80;
an overload detection circuit 90;
a temperature detection circuit 11;
a fan control circuit 12;
a status indication circuit 13;
an auxiliary power supply circuit 14;
a USB circuit 15;
a first USB circuit 1501;
a second USB circuit 1502.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, the utility model provides an intelligence exchanges step-down converting circuit, include: the alternating current-direct current conversion circuit comprises an alternating current-direct current conversion circuit 10, a direct current voltage reduction circuit 20, a direct current-alternating current conversion circuit 30, a direct current-alternating current driving circuit 50 and a main control circuit 60, wherein the alternating current-direct current conversion circuit 10 is used for converting input alternating current into first high-voltage direct current; the alternating current may be mains electricity. For example 220V input ac. The input alternating current is rectified and filtered by the alternating current-direct current conversion circuit 10 and then converted into first high-voltage direct current.
The dc step-down circuit 20 is connected to the ac-dc conversion circuit 10, and the dc step-down circuit 20 is configured to convert the first high-voltage dc into a second high-voltage dc.
The dc-ac conversion circuit 30 is connected to the dc voltage reduction circuit 20, and the dc-ac conversion circuit 30 is configured to convert the second high-voltage dc into an output ac. For example, the second high-voltage direct current is converted into 110V output alternating current.
The direct current and alternating current driving circuit 50 is connected with the direct current and alternating current conversion circuit 30; the dc/ac driving circuit 50 is configured to output a driving signal to drive the dc/ac converting circuit 30 to convert between dc power and ac power.
The main control circuit 60 is respectively connected to the dc voltage dropping circuit 20 and the dc/ac driving circuit 50, and is configured to output a voltage dropping control signal to drive the dc voltage dropping circuit 20 to drop the first high-voltage dc voltage to output a second high-voltage dc voltage; and outputs the dc-ac conversion signal to drive the dc-ac conversion circuit 30 through the dc-ac driving circuit 50 to convert the second high voltage dc into the output ac. The main control circuit 60 is configured to output two sets of control signals, and one set of voltage reduction control signal is output to the dc voltage reduction circuit 20 to control the dc voltage reduction circuit 20 to convert the first high voltage dc voltage into the second high voltage dc voltage. The other set of dc/ac control signals is output to the dc/ac driving circuit 50 to control the dc/ac driving circuit 50 to generate driving signals, and the driving signals drive the dc/ac converting circuit 30 to convert the second high voltage dc into the output ac.
The intelligent ac step-down converting circuit provided in this embodiment is used for converting an input ac into a first high-voltage dc through the ac/dc converting circuit 10; the direct current voltage reduction circuit 20 is connected with the alternating current-direct current conversion circuit 10; the direct current-alternating current conversion circuit 30 is connected with the direct current step-down circuit 20; the direct current/alternating current driving circuit 50 is connected to the direct current/alternating current conversion circuit 30; the main control circuit 60 is respectively connected to the dc voltage dropping circuit 20 and the dc/ac driving circuit 50, and is configured to output a voltage dropping control signal to drive the dc voltage dropping circuit 20 to drop the first high-voltage dc voltage to output a second high-voltage dc voltage; and outputs the dc-ac conversion signal to drive the dc-ac conversion circuit 30 through the dc-ac driving circuit 50 to convert the second high voltage dc into the output ac. The whole circuit is relatively simple, the manufacturing cost is low, and the failure rate of the circuit is low.
Referring to fig. 7, the dc-ac driving circuit 50 includes a first driving circuit 501 and a second driving circuit 502, the first driving circuit 501 and the second driving circuit 502 form a full-bridge driving circuit, and perform full-bridge driving on the dc-ac converting circuit 30, where the first driving circuit 501 includes: the charging circuit comprises a diode D2 and a capacitor C22, the anode of the diode D2 is connected with a first power supply voltage, the cathode of the diode D2 is connected with one end of the capacitor C22, the other end of the capacitor C22 is connected with the common end of an upper bridge transistor Q4 and a lower bridge transistor Q6 of the DC-AC conversion circuit 30, and the charging circuit is used for charging the capacitor C22 through the first power supply voltage so as to provide a second power supply voltage through a capacitor C22; the down tube driving circuit comprises a first transistor Q8, wherein the base of the first transistor Q8 is connected with the signal output end of the main control circuit 60, the emitter of the first transistor Q8 is connected with the reference ground, the collector of the first transistor Q8 is connected with the output end of the first power supply voltage through a first resistor R54, and the collector of the first transistor Q8 is further connected with the controlled end of a lower bridge transistor Q6 of the direct current conversion circuit 30, so as to drive the lower bridge transistor Q6 of the direct current conversion circuit 30 to be switched on or switched off; the upper tube driving circuit comprises a second transistor Q9, wherein the base of the second transistor Q9 is connected with the collector of the first transistor Q8, the collector of the second transistor Q9 is connected with the common end of the diode D2 and the capacitor C22 through a second resistor R52, the emitter of the second transistor Q9 is connected with the reference ground, the collector of the second transistor Q9 is further connected with the controlled end of the upper bridge transistor Q4 of the direct current-to-alternating current conversion circuit 30, and the upper bridge transistor Q4 of the direct current-to-alternating current conversion circuit 30 is driven to be switched on or switched off through the second supply voltage output by the capacitor C22. Specifically, when the main control circuit 60 outputs a high level through the PW1 signal, the transistor Q8 is turned on, and the transistor Q9 is turned off. At this time, the transistor Q8 outputs the low level PWM2 through the collector, and the low level turns off the lower bridge transistor Q6 of the dc-ac converting circuit 30; the transistor Q9 outputs a high level PWM1 through the collector, and the high level makes the upper bridge transistor Q4 of the dc-ac converting circuit 30 conductive; similarly, when the main control circuit 60 outputs a level, the lower bridge transistor Q6 is turned on, and the upper bridge transistor Q4 is turned off.
The embodiment of the utility model provides an in, drive circuit's complicated design has been simplified through direct alternating current drive circuit 50 for whole circuit is more succinct.
Referring to fig. 2 and 9, the dc-to-ac conversion includes: the rectifier filter circuit 101 is connected with the direct current voltage reduction circuit 20 and is used for rectifying and converting input alternating current into first high-voltage direct current; the dc conversion circuit 102 is connected to the rectifying and filtering circuit 101, and is configured to convert the first high-voltage dc into a first low-voltage dc.
Specifically, a path of high-voltage direct current and at least a path of low-voltage direct current can be output through the rectifier filter circuit 101 and the direct current conversion circuit 102 respectively, the high-voltage direct current can be used for being converted into alternating current and then output, and the low-voltage direct current can be output through an interface to supply power for low-voltage equipment.
Referring to fig. 2, the intelligent ac step-down converting circuit further includes a USB circuit 15, and the USB circuit 15 is connected to the dc converting circuit 102. The dc conversion circuit 102 provides low voltage dc power for the USB circuit 15, and supplies power to the external USB device through the USB circuit 15.
Referring to fig. 10, the USB circuit 15 includes a first USB circuit 1501 and a second USB circuit 1502, and the first USB circuit 1501 and the second USB circuit 1502 are respectively connected to the dc conversion circuit 102. The two external USB devices can be respectively connected through the two USB circuits 15 and supply power to the two external USB devices. As shown in fig. 10, the first USB circuit 1501 includes a USB interface USB2 and a fast charging integrated circuit U3, respectively, the USB interface USB2 is used for connecting with an external USB device, and the fast charging integrated circuit U3 is used for performing fast charging protocol communication with the external USB device to perform fast charging for the external USB device. As shown in fig. 10, the second USB circuit 1502 also includes a USB interface USB1 and a fast-charging integrated circuit U2, respectively, which function the same as the USB interface USB2 and the fast-charging integrated circuit U3 described above.
Referring to fig. 2, fig. 3, fig. 4 and fig. 5, the intelligent ac step-down converting circuit further includes a second voltage detecting circuit 70, and the second voltage detecting circuit 70 is respectively connected to the dc step-down circuit 20 and the main control circuit 60, and is configured to detect the voltage of the second high voltage dc. Or the second voltage detection circuit is respectively connected with the direct current-alternating current conversion circuit and the main control circuit and is used for detecting the voltage of the output alternating current.
Specifically, the main control circuit 60 obtains a voltage value of the second high-voltage direct current or the output alternating current through the second voltage detection circuit 70, and adjusts a pulse width of the output step-down control signal according to the detected voltage value to ensure stability of the output voltage of the second high-voltage direct current, thereby ensuring voltage stability of the output alternating current and reducing a voltage feedback circuit at an alternating current output end; in addition, when the input voltage is over-voltage, the output of the direct current voltage reduction circuit 20 or the direct current/alternating current driving circuit 50 can be controlled to stop, so that the power utilization safety is ensured.
Referring to fig. 8, the second voltage detection circuit 70 includes a resistor R64 and a resistor R62, one end of the resistor R64 is connected to the dc voltage step-down circuit 20 through a HV1 signal, the other end of the resistor R64 is connected to one end of the resistor R62, the other end of the resistor R62 is connected to the reference ground, and one end of the resistor R62 is further connected to the voltage sampling terminal of the main control circuit 60 through the resistor R65. The resistor R64 and the resistor R62 divide the second high voltage dc voltage and input the divided voltage to the main control circuit 60. Therefore, voltage detection of the second high-voltage direct current is realized.
Further, in an embodiment of the present invention, the intelligent ac step-down converting circuit further includes a first voltage detecting circuit 70, and the first voltage detecting circuit 70 is connected to the ac-dc converting circuit 10 and the main control circuit 60 respectively for detecting the voltage of the first high voltage dc.
Specifically, the main control circuit 60 obtains the voltage value of the first high voltage direct current through the first voltage detection circuit 70, and adjusts the pulse width of the output step-down control signal according to the detected voltage value, so as to ensure the stability of the output voltage of the second high voltage direct current. In addition, when the input voltage is over-voltage, the output of the direct current voltage reduction circuit 20 or the direct current/alternating current driving circuit 50 can be controlled to stop, so that the power utilization safety is ensured.
Referring to fig. 2, fig. 3, fig. 4 and fig. 5, the intelligent ac step-down converting circuit further includes an overload detecting circuit 90, where the overload detecting circuit 90 is respectively connected to the dc-ac converting circuit 30 and the main control circuit 60, and is configured to detect an overload of the output ac power; or the overload detection circuit is connected with the direct current voltage reduction circuit and the main control circuit and is used for detecting the overload of the output alternating current.
Specifically, the main control circuit 60 obtains the current value of the output ac or dc step-down circuit through the overload detection circuit 90, and determines whether the output current is over-current according to the detected current value, and when the output current is over-current, the output can be stopped by controlling the dc step-down circuit 20 or the dc/ac driving circuit 50, so as to ensure the safety of power consumption.
The embodiment of the utility model provides a through overload detection circuit 90 to the overload detection of output alternating current, reduced the overload detection of input for the whole circuit is more succinct.
Referring to fig. 8, the second over-current detection circuit includes a resistor R40, one end of the resistor R40 is connected to one end of the dc-ac conversion circuit 30, and the other end of the resistor R40 is connected to the ground GND. One end of the resistor R40 IS also connected to the current sampling terminal IS of the main control circuit 60. The input current is detected by a resistor R40.
Referring to fig. 2, the intelligent ac step-down converting circuit further includes a temperature detecting circuit 11, and the temperature detecting circuit 11 is connected to the main control circuit 60.
Specifically, the main control circuit 60 obtains the temperature value of the device equipped with the intelligent ac step-down conversion circuit through the temperature detection circuit 11, and determines whether the temperature is over-temperature according to the detected temperature value, and when the temperature is over-temperature, the output of the dc step-down circuit 20 or the dc/ac driving circuit 50 can be stopped by controlling, so as to ensure the power utilization safety.
Referring to fig. 8, the temperature detection circuit 11 includes a thermistor RT1 and a resistor R61, one end of the thermistor RT1 is connected to +5V of the power supply, the other end of the thermistor RT1 is connected to one end of the resistor R61, the other end of the resistor R61 is connected to the reference ground, and one end of the resistor R61 is further connected to the temperature detection end of the main control circuit 60.
Referring to fig. 2, the intelligent ac step-down converting circuit further includes a fan control circuit 12, and the fan control circuit 12 is connected to the main control circuit 60 and configured to control a rotation speed of the fan according to a temperature detection value.
Specifically, the main control circuit 60 obtains the temperature value of the device on which the intelligent ac step-down converting circuit is installed through the fan control circuit 12, and controls the rotating speed of the fan according to the detected temperature value, so as to ensure the temperature in the device on which the intelligent ac step-down converting circuit is installed, avoid the over-high temperature, and ensure the power consumption safety.
Referring to fig. 8, the fan control circuit 12 includes a transistor Q2, a base of a transistor Q2 is connected to the fan control terminal of the main control circuit 60, an emitter of a transistor Q2 is connected to the ground reference, and a collector of a transistor Q2 is connected to the fan. The main control circuit 60 outputs a fan driving signal to drive the fan to rotate through a transistor Q2.
Referring to fig. 2, the intelligent ac step-down converting circuit further includes an auxiliary power circuit 14, the auxiliary power circuit 14 is connected to the ac-dc converting circuit 10, and is configured to convert the first low-voltage ac output by the ac-dc converting circuit 10 into a second low-voltage dc and a third low-voltage dc, where the second low-voltage dc supplies power to the dc-ac driving circuit 50, and the third low-voltage dc supplies power to the main control circuit 60.
Referring to fig. 11, the auxiliary power circuit 14 includes a power chip U1 and a power chip U2, the power chip U2 is connected to the AC/dc conversion circuit 10, converts the low-voltage AC power AC15V output by the AC/dc conversion circuit 10 into a second low-voltage dc power of +12V, and the power chip U1 is connected to the output terminal of the power chip U2, and converts the second low-voltage dc power into a third low-voltage dc power.
Referring to fig. 2, the intelligent ac step-down converting circuit further includes a status indicating circuit 13, the status indicating circuit 13 is connected to the main control circuit 60, and the status indicating circuit 13 indicates the operating status of the intelligent ac step-down converting circuit.
Referring to fig. 12, the status indication circuit 13 includes two LED lamps and two resistors. The LED lamp is connected in series with the resistor and then connected to the main control circuit 60. The main control circuit 60 controls the two LED lamps to emit light or extinguish according to the working state of the circuit.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent replacements may be made for some of the technical features of the embodiments. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (10)
1. An intelligent AC buck conversion circuit, comprising:
the alternating current-direct current conversion circuit is used for converting input alternating current into first high-voltage direct current;
the direct current voltage reduction circuit is connected with the alternating current-direct current conversion circuit;
the direct current-alternating current conversion circuit is connected with the direct current voltage reduction circuit;
the direct current and alternating current driving circuit is connected with the direct current and alternating current conversion circuit;
the main control circuit is respectively connected with the direct current voltage reduction circuit and the direct current and alternating current driving circuit and is used for outputting a voltage reduction control signal to drive the direct current voltage reduction circuit to reduce the first high-voltage direct current so as to output a second high-voltage direct current; and outputting a direct current-to-alternating current conversion signal so as to drive the direct current-to-alternating current conversion circuit to convert the second high-voltage direct current into output alternating current through the direct current-to-alternating current driving circuit.
2. The intelligent ac buck converter circuit according to claim 1, wherein the dc-ac conversion comprises:
the rectification filter circuit is connected with the direct current voltage reduction circuit and is used for rectifying and converting input alternating current into the first high-voltage direct current;
and the direct current conversion circuit is connected with the rectification filter circuit and is used for converting the first high-voltage direct current into a first low-voltage direct current.
3. The intelligent ac buck converter circuit according to claim 2, further comprising a USB circuit, the USB circuit being connected to the dc converter circuit.
4. The intelligent AC buck converter circuit according to claim 3, wherein the USB circuit includes a first USB circuit and a second USB circuit, and the first USB circuit and the second USB circuit are respectively connected to the DC converter circuit.
5. The intelligent ac buck converter circuit according to claim 1, further comprising a second voltage detection circuit, wherein the second voltage detection circuit is connected to the dc buck circuit and the main control circuit, respectively, and configured to detect a voltage of the second high voltage dc;
or the second voltage detection circuit is respectively connected with the direct current-alternating current conversion circuit and the main control circuit and is used for detecting the voltage of the output alternating current.
6. The intelligent ac buck converter circuit according to claim 1, further comprising an overload detection circuit, wherein the overload detection circuit is connected to the dc-ac converter circuit and the main control circuit, respectively, and configured to detect an overload of the output ac power;
or the overload detection circuit is connected with the direct current voltage reduction circuit and the main control circuit and is used for detecting the overload of the output alternating current.
7. The intelligent AC buck converter circuit according to claim 1, further comprising a temperature detection circuit, the temperature detection circuit being connected to the main control circuit.
8. The intelligent AC buck converter circuit according to claim 6, further comprising a fan control circuit, wherein the fan control circuit is connected to the main control circuit and configured to control a rotation speed of the fan according to a temperature detection value.
9. The intelligent ac buck converter circuit according to claim 1, further comprising an auxiliary power circuit, connected to the ac-dc converter circuit, for converting the first low-voltage ac output from the ac-dc converter circuit into a second low-voltage dc for powering the dc-ac driver circuit and a third low-voltage dc for powering the main controller circuit.
10. The intelligent ac buck converter circuit according to claim 1, wherein the ac-dc driver circuit comprises a first driver circuit, the first driver circuit comprising:
a charging circuit, comprising a diode (D2) and a capacitor (C22), wherein the anode of the diode (D2) is connected with a first supply voltage, the cathode of the diode (D2) is connected with one end of the capacitor (C22), the other end of the capacitor (C22) is connected with the common end of an upper bridge transistor (Q4) and a lower bridge transistor (Q6) of a direct-alternating current conversion circuit, and the charging circuit is used for charging the capacitor (C22) through the first supply voltage to provide a second supply voltage through the capacitor (C22);
a lower tube driving circuit, which comprises a first transistor (Q8), wherein the base of the first transistor (Q8) is connected with the signal output end of the main control circuit, the emitter of the first transistor (Q8) is connected with the reference ground, the collector of the first transistor (Q8) is connected with the output end of the first supply voltage through a first resistor (R54), and the collector of the first transistor (Q8) is also connected with the controlled end of a lower bridge transistor (Q6) of a direct current and alternating current conversion circuit, and is used for conducting or cutting off the lower bridge transistor (Q6) of the direct current and alternating current conversion circuit;
the upper tube driving circuit comprises a second transistor (Q9), wherein the base of the second transistor (Q9) is connected with the collector of the first transistor (Q8), the collector of the second transistor (Q9) is connected with the common end of the diode (D2) and the capacitor (C22) through a second resistor (R52), the emitter of the second transistor (Q9) is connected with the reference ground, the collector of the second transistor (Q9) is also connected with the controlled end of the upper bridge transistor (Q4) of the direct-alternating current conversion circuit, and the second supply voltage output by the capacitor (C22) is used for conducting or cutting off the upper bridge transistor (Q4) of the direct-alternating current conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920939755.6U CN210536520U (en) | 2019-06-20 | 2019-06-20 | Intelligent alternating current voltage reduction conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920939755.6U CN210536520U (en) | 2019-06-20 | 2019-06-20 | Intelligent alternating current voltage reduction conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210536520U true CN210536520U (en) | 2020-05-15 |
Family
ID=70595493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920939755.6U Active CN210536520U (en) | 2019-06-20 | 2019-06-20 | Intelligent alternating current voltage reduction conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210536520U (en) |
-
2019
- 2019-06-20 CN CN201920939755.6U patent/CN210536520U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102917503B (en) | LED driver system with energy storage function | |
| CN106160195B (en) | A kind of power consumption management method and system | |
| WO2022007696A1 (en) | Lighting circuit with low standby power consumption, and lighting fixture | |
| CN108923665A (en) | A kind of AC-AC conversion circuit and device | |
| CN209627761U (en) | LED Drive Protecting Circuit | |
| WO2020007171A1 (en) | Compound isolation type led emergency lamp control circuit | |
| EP3160025B1 (en) | Voltage set-up automatic matching circuits | |
| CN203788516U (en) | Intelligent dimming efficient constant-current LED driving chip | |
| CN110798927A (en) | LED drive circuit based on T-shaped lamp tube | |
| CN212211460U (en) | Low standby power consumption lighting circuit and lighting lamp | |
| CN101895208A (en) | Power supplier for negative pressure load | |
| CN210536520U (en) | Intelligent alternating current voltage reduction conversion circuit | |
| CN210578272U (en) | Intelligent silicon controlled voltage conversion circuit | |
| CN115021382A (en) | USB power management system and charging cabinet | |
| CN211509366U (en) | LED drive circuit based on T-shaped lamp tube | |
| CN211267181U (en) | LED lamp circuit with emergency lighting function | |
| CN208424217U (en) | A kind of AC-AC conversion circuit and device | |
| WO2022082890A1 (en) | Alternating-current and direct-current switching lighting drive circuit and lamp | |
| CN110366286B (en) | Double-driving circuit and LED lamp driving device | |
| CN111194125A (en) | Lighting circuit compatible with high-power emergency driving and having emergency dimming function | |
| CN215121267U (en) | Non-voltage-isolating and voltage-reducing type desk lamp driving circuit | |
| CN216795332U (en) | Power supply controller of intelligent sphygmomanometer | |
| CN210491280U (en) | LED equipment power terminal control device | |
| CN213755031U (en) | Indicating lamp circuit and power supply equipment | |
| CN217721540U (en) | LED drive circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Three Floors of Baotian Road 358 Factory Area, Tiegang Community, Xixiang Street, Baoan District, Shenzhen City, Guangdong Province Patentee after: Guangdong best medical equipment Co., Ltd Address before: 518000 Three Floors of Baotian Road 358 Factory Area, Tiegang Community, Xixiang Street, Baoan District, Shenzhen City, Guangdong Province Patentee before: Guangdong BESTEK E-commerce Co.,Ltd. |