CN212486145U - AC-DC rectifier with multi-voltage-class output - Google Patents
AC-DC rectifier with multi-voltage-class output Download PDFInfo
- Publication number
- CN212486145U CN212486145U CN202020968673.7U CN202020968673U CN212486145U CN 212486145 U CN212486145 U CN 212486145U CN 202020968673 U CN202020968673 U CN 202020968673U CN 212486145 U CN212486145 U CN 212486145U
- Authority
- CN
- China
- Prior art keywords
- resistor
- voltage
- capacitor
- terminal
- pin
- 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
Abstract
The AC-DC converter with multiple voltage grade outputs comprises an AC-DC rectifier module, a DC switch module, a DC transformer, an output voltage selection module, an output sensing module and a main control module; the direct current switch module is used for shunting the direct current to control the current input to the input end of the direct current transformer, the direct current transformer is used for converting the voltage of the direct current input from the input end of the direct current transformer into various voltage grades, the main control module controls the output voltage selection module to select the voltage output by the direct current transformer as a specified voltage grade by detecting the voltage of the rechargeable battery, and the output sensing module is used for outputting the voltage grade selected by the output voltage selection module to the rechargeable battery; therefore, constant-current and constant-voltage charging of various battery packs with different voltages is realized.
Description
Technical Field
The utility model relates to a technical field that charges, concretely relates to alternating current-to-direct current rectifier with multiple voltage class output.
Background
The electric energy used by people comes from commercial power, the commercial power is alternating current with the voltage of 200V-240V, when the commercial power is used for charging the rechargeable battery, the alternating current must be converted into direct current, the existing charging technology of converting the alternating current into the direct current is to directly convert the alternating current into the direct current, when the voltage of the alternating current changes, the current voltage of the direct current input into the rechargeable battery also changes, as shown in figure 4, the charging efficiency with the shortest charging time is the highest only under the condition that the current voltage of the direct current input into the rechargeable battery is kept constant current and constant voltage, and under the condition that the current voltage of the direct current input into the rechargeable battery fluctuates, the charging time is prolonged, the charging efficiency is reduced, and the service life of the rechargeable battery is easily damaged.
Therefore, under the circumstance that the application of charging equipment is more and more common, a charging technology capable of realizing constant-current constant-voltage charging by using a single charger as various battery packs with different voltages is urgently needed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an alternating current-direct current rectifier with multiple voltage class output, which realizes the constant current and constant voltage charging of various battery packs with different voltages.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the method comprises the steps that an alternating current-to-direct current rectifier with multiple voltage grade outputs is provided, and the alternating current-to-direct current rectifier comprises an alternating current-to-direct current rectifying module, a direct current switch module, a direct current transformer, an output voltage selection module, an output sensing module and a main control module; the direct current transformer is a transformer with multiple voltage grade outputs; the main control module is used for controlling the output voltage selection module to select the voltage output by the direct current transformer as a specified voltage level by detecting the voltage of a rechargeable battery, and the output sensing module is used for outputting the voltage level selected by the output voltage selection module to the rechargeable battery;
the input end of the alternating current-to-direct current rectifying module is connected with an alternating current power supply, the alternating current-to-direct current rectifying module is electrically connected with the direct current switch module, the direct current switch module is also electrically connected with the input end of the direct current transformer, the output end of the direct current transformer is electrically connected with the output voltage selection module, the output voltage selection module is respectively electrically connected with the output sensing module and the main control module, the output end of the output sensing module is connected with a rechargeable battery, and the output sensing module is also electrically connected with the main control module;
the alternating current is converted into direct current through the alternating current-to-direct current rectifying module, the direct current is input to the direct current transformer after being subjected to shunt processing through the direct current transformer, the direct current transformer converts the voltage of the direct current after being subjected to shunt processing into multiple voltage grades to be output to the output voltage selection module, the main control module detects the voltage of a rechargeable battery connected with the output sensing module through the output sensing module, the main control module controls the selected output voltage of the output voltage selection module to be a specified voltage grade according to the voltage of the rechargeable battery, and the output voltage selection module outputs the selected output voltage grade to the rechargeable battery through the output sensing module, so that the function of constant-current and constant-voltage charging of the rechargeable battery is achieved.
Further, the voltage class output by the dc transformer includes a first-stage output voltage, a second-stage output voltage, a third-stage output voltage, and a fourth-stage output voltage, the voltage range of the first-stage output voltage corresponding to the rechargeable battery is 33.6V to 40.8V, the voltage range of the second-stage output voltage corresponding to the rechargeable battery is 44.8V to 54.4V, the voltage range of the third-stage output voltage corresponding to the rechargeable battery is 56.0V to 68.0V, and the voltage range of the third-stage output voltage corresponding to the rechargeable battery is 68.0V to 81.6V.
Further, the output voltage selection module comprises a first selection switch, a second selection switch and a third selection switch; the first selection switch comprises a switch S1, a terminal S1-A and a terminal S1-B, the second selection switch comprises a switch S2, a terminal S2-A and a terminal S2-B, and the third selection switch comprises a switch S3, a terminal S3-A, a terminal S3-B and a terminal Vout;
the terminal S1-A is connected with a pin 16 of the DC transformer, the terminal S1-B is connected with a pin 15 of the DC transformer, the terminal S2-A is connected with a pin 12 of the DC transformer, the terminal S2-B is connected with a pin 10 of the DC transformer, the terminal S3-A is connected with the terminal S1-A or the terminal S1-B, the terminal S3-B is connected with the terminal S2-A or the terminal S2-B, and the terminal Vout is connected with the terminal S3-A or the terminal S3-B.
Further, the voltage outputted from the terminal S1-A is the first stage output voltage, the voltage outputted from the terminal S1-B is the second stage output voltage, the voltage outputted from the terminal S2-A is the third stage output voltage, and the voltage outputted from the terminal S2-B is the fourth stage output voltage;
when the terminal S3-A is connected to the terminal S1-A and the terminal Vout is connected to the terminal S3-A, the output voltage of the output voltage selection module is the first stage output voltage;
when the terminal S3-A is connected to the terminal S1-B and the terminal Vout is connected to the terminal S3-A, the output voltage of the output voltage selection module is the second stage output voltage;
when the terminal S3-B is connected to the terminal S2-A and the terminal Vout is connected to the terminal S3-B, the output voltage of the output voltage selection module is the third stage output voltage;
when the terminal S3-B is connected to the terminal S2-B and the terminal Vout is connected to the terminal S3-B, the output voltage of the output voltage selection module is the fourth stage output voltage.
Further, the output sensing module comprises a diode D2, a bidirectional zener diode DC1, a zener diode DZ22, a switch K1, a fuse F2, polar capacitors C20 and C21, capacitors C10 and C11, resistors R13, R14, and R15, a connector JP 2; the connector JP2 is an output end of the output sensing module and is used for connecting a rechargeable battery;
the positive electrode of the polar capacitor C20 is connected to the terminal Vout, the positive electrode of the polar capacitor C20 is further connected to the positive electrode of the polar capacitor C21, the positive electrode of the polar capacitor C21 is further connected to one end of the capacitor C11, one end of the capacitor C11 is further connected to one end of the resistor R14, one end of the resistor R14 is further connected to one end of the bidirectional zener diode DC1, one end of the bidirectional zener diode DC1 is connected to the negative electrode of the zener diode DZ22 and one end of the fuse F2, the other end of the fuse F2 is connected to the first contact of the switch K1, the switch K1 is further connected to the power source 5V, and the second contact of the switch K1 is connected to the pin 1 of the connector JP 2;
one end of the capacitor C10 is connected with the cathode of the diode D2, the other end of the capacitor C10 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with the anode of the diode D2, the anode of the diode D2 is also connected with the cathode of the polar capacitor C20, the cathode of the polar capacitor C20 is also connected with the cathode of the polar capacitor C21, the cathode of the polar capacitor C21 is also connected with the other end of the capacitor C11, the other end of the resistor R14 is connected with one end of the resistor R15, the other end of the capacitor C11 is also connected with the other end of the resistor R15, the other end of the resistor R15 is also grounded, the other end of the resistor R15 is also connected with the other end of the voltage stabilizing diode DC1, the other end of the zener diode DC1 is further connected to the anode of the zener diode DZ22, and the cathode of the diode D2 is further connected to the pin 9 of the DC transformer.
Further, the main control module comprises an isolated flyback power controller U2, a current detection chip U3, a diode D3, capacitors C12 and C13, a voltage stabilizing diode DZ23, resistors R11, R12, R16 and R17; the isolated flyback power controller U2 is used for providing constant voltage and constant current, and the current detection chip U3 is a monitor for current, power and voltage;
one end of the resistor R11 is connected to the terminal Vout, one end of the resistor R12 is connected to a connection point between one end of the capacitor C10 and the cathode of the diode D2, one end of the resistor R12 is further connected to a pin 9 of the dc transformer, a pin 2 of the isolated flyback power controller U2 is connected to the other end of the resistor R11 and one end of the capacitor C12, the other end of the capacitor C12 is connected to a pin 3 and a pin 4 of the isolated flyback power controller U2, the other end of the capacitor C12 is also grounded, the other end of the resistor R11 is further connected to the anode of the zener diode DZ23, and the cathode of the zener diode DZ23 is connected to a pin 7 of the isolated flyback power controller U2 and the other end of the resistor R12;
the pin 1, the pin 2 and the pin 3 of the current detection chip U3 are connected and then connected with the pin 2 of the connector JP2, the pin 14, the pin 15 and the pin 16 of the current detection chip U3 are connected and then connected with the anode of the voltage stabilizing diode DZ22, the anode of the diode D3 is connected with the pin 1 of the connector JP2, the cathode of the diode D3 is connected with one end of the resistor R16, the other end of the resistor R16 is connected to the pin 12 of the current detection chip U3 and one end of the resistor R17 respectively, the other end of the resistor R17 is connected with a pin 6 of the current detection chip U3, a pin 19 of the current detection chip U3 is respectively connected with one end of the capacitor C13 and a power supply 5V, and a pin 4, a pin 5 and a pin 8 of the current detection chip U3 are connected and then respectively connected with the other end of the capacitor C13 and the ground, and the other end of the resistor R17 is also grounded.
Further, the alternating current-direct current rectifying module comprises a connector JP1, a fuse F1, a capacitor C1, common mode inductors L1 and L2 and a rectifying bridge D1; the connector JP1 is an input end of the ac-dc rectifier module, and is used for accessing ac power; the common mode inductors L1 and L2 are used for suppressing common mode interference existing in an alternating current power grid; the rectifier bridge D1 is composed of diodes D11, D12, D13 and D14, wherein the cathode of the diode D11 is connected with the cathode of the diode D12, the anode of the diode D13 is connected with the anode of the diode D14, the anode of the diode D11 is connected with the cathode of the diode D13, and the anode of the diode D12 is connected with the cathode of the diode D14;
Further, the direct current switch module comprises an isolated flyback power controller U1, an iron core inductor L3, polar capacitors C2 and C3, capacitors C4, C5, C6, C7, C8 and C9, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R18, R19, R20, R21, R22, R23 and R24, triodes Q2 and Q3, and a MOS transistor Q1; the isolated flyback power controller U1 is configured to provide a constant voltage and a constant current, the positive electrode of the polarity capacitor C2 is connected to one end of the core inductor L3, the other end of the core inductor L3 is connected to the positive electrode of the polarity capacitor C3 and one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2, one end of the resistor R3 is connected to one end of the resistor R1 and the other end of the resistor R2, the other end of the resistor R2 is further connected to the negative electrode of the polarity capacitor C3, the negative electrode of the polarity capacitor C3 is further connected to the negative electrode of the polarity capacitor C2, the negative electrode of the polarity capacitor C3 is further grounded, one end of the resistor R1 is further connected to one end of the resistor R5, the other end of the resistor R5 is connected to one end of the resistor R6, one end of the resistor R5 is further connected to one end of the capacitor C4, one end of the capacitor C4 is further connected to one end of the capacitor C5, one end of the capacitor C5 is further connected to a power supply 5V and a pin 2 of the dc transformer, the other end of the capacitor C5 is connected to the other end of the capacitor C4 and then is connected to the other end of the resistor R6 and one end of the resistor R23, the other end of the resistor R23 is connected to one end of the resistor R24, and the other end of the resistor R24 is connected to a drain of the MOS transistor and a pin 1 of the dc transformer;
a pin 7 of the isolated flyback power controller U1 is connected to the other end of the resistor R3 and one end of the resistor R4, respectively, the other end of the resistor R4 is grounded, a pin 1 of the isolated flyback power controller U1 is connected to one end of the capacitor C7 and a collector of the transistor Q2, one end of the capacitor C7 is further connected to one end of the capacitor C6, one end of the capacitor C6 is further connected to one end of the resistor R7, the other end of the resistor R7 is connected to one end of the resistor R8, a pin 2 of the isolated flyback power controller U1 is connected to the other end of the resistor R8 and one end of the resistor R9, the other end of the resistor R9 is connected to one end of the resistor R10, the other end of the resistor R10 is grounded, and the other end of the resistor R10 is further connected to the other ends of the capacitor C6 and the capacitor C7, the other end of the capacitor C7 is further connected to the pin 4 of the isolated flyback power controller U1 and one end of the capacitor C8, the other end of the capacitor C8 is connected to the pin 5 of the isolated flyback power controller U1 and one end of the resistor R20, one end of the capacitor C8 is further connected to the collector of the transistor Q3 and the other end of the capacitor C9, the pin 6 of the isolated flyback power controller U1 is connected to the base of the transistor Q2 and the base of the transistor Q3, a connection point between the emitter of the transistor Q2 and the emitter of the transistor Q3 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to the gate of the MOS transistor Q1 and one end of the resistor R19, the other end of the resistor R19 is connected to the source of the MOS transistor and one end of the resistor R21, the other end of the resistor R20 is connected to the connection point between the other end of the resistor R3619 and one end of the resistor R21 The other end of the resistor R21 is connected with one end of the resistor R22, and the other end of the resistor R22 is grounded.
Further, the anode of the polar capacitor C2 is further connected to a connection point between the cathode of the diode D11 and the cathode of the diode D12, and the cathode of the polar capacitor C2 is further connected to a connection point between the anode of the diode D13 and the anode of the diode D14, so that the dc power output from the ac-dc rectifier module flows into the dc switch module.
Further, the model of the current detection chip is INA 260.
Compared with the prior art, the AC-DC converter with multiple voltage grade outputs provided by the utility model comprises an AC-DC rectifier module, a DC switch module, a DC transformer, an output voltage selection module, an output sensing module and a main control module; the direct current transformer is a transformer with multi-stage voltage output; the direct current switch module is used for shunting the direct current to control the current input to the input end of the direct current transformer, the direct current transformer is used for converting the voltage of the direct current input from the input end of the direct current transformer into various voltage grades, the main control module controls the output voltage selection module to select the voltage output by the direct current transformer as a specified voltage grade by detecting the voltage of the rechargeable battery, and the output sensing module is used for outputting the voltage grade selected by the output voltage selection module to the rechargeable battery; the utility model discloses a voltage level of direct current transformer output is selected according to rechargeable battery's voltage to main control module to it charges to have realized carrying out constant current constant voltage to rechargeable battery.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a system of an ac-dc converter with multiple voltage class outputs according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of an ac-dc converter with multiple voltage class outputs according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating a control principle of an output voltage selection module of an ac-dc converter with multiple voltage class outputs according to an embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating characteristics of constant-current and constant-voltage charging of an ac-dc converter with multiple voltage class outputs according to an embodiment of the present invention.
The mark in the figure is 1, and the alternating current-direct current rectifying module; 2. a DC switch module; 3. a DC transformer; 4. an output voltage selection module; 5. a main control module; 6. and outputting the sensing module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, the present invention provides a preferred embodiment.
Referring to fig. 1, the ac-dc converter with multiple voltage class outputs provided in this embodiment includes an ac-dc rectifier module 1, a dc switch module 2, a dc transformer 3, an output voltage selection module 4, an output sensing module 6, and a main control module 5; the direct current transformer 3 is a transformer with multi-stage voltage output; the alternating current-to-direct current rectifying module 1 is used for rectifying input alternating current into direct current, the direct current switch module 2 is used for shunting the direct current to control the current input to the input end of the direct current transformer 3, the direct current transformer 3 is used for converting the voltage of the direct current input from the input end of the direct current transformer 3 into various voltage grades, the main control module 5 controls the output voltage selection module 4 to select the voltage output by the direct current transformer 3 as a specified voltage grade by detecting the voltage of the rechargeable battery, and the output sensing module 6 is used for outputting the voltage grade selected by the output voltage selection module 4 to the rechargeable battery;
the input end of an alternating current-direct current rectifying module 1 is connected with an alternating current power supply, the alternating current-direct current rectifying module 1 is electrically connected with a direct current switch module 2, the direct current switch module 2 is also electrically connected with the input end of a direct current transformer 3, the output end of the direct current transformer 3 is electrically connected with an output voltage selection module 4, the output voltage selection module 4 is respectively electrically connected with an output sensing module 6 and a main control module 5, the output end of the output sensing module 6 is connected with a rechargeable battery, and the output sensing module 6 is also electrically connected with the main control module 5;
alternating current is converted into direct current through the alternating current-to-direct current rectifying module 1, the direct current is input to the direct current transformer 3 after being subjected to shunt processing through the direct current transformer 3, the direct current transformer 3 converts the voltage of the direct current after the shunt processing into various voltage grades to be output to the output voltage selection module 4, the main control module 5 detects the voltage of the rechargeable battery connected with the output sensing module 6 through the output sensing module 6, the main control module 5 controls the selected output voltage of the output voltage selection module 4 to be the specified voltage grade according to the voltage of the rechargeable battery, and the output voltage selection module 4 outputs the selected output voltage grade to the rechargeable battery through the output sensing module 6, so that the function of constant-current and constant-voltage charging of the rechargeable battery is realized.
The alternating current-to-direct current rectifier with multiple voltage grade outputs provided by the technical scheme comprises an alternating current-to-direct current rectifier module 1, a direct current switch module 2, a direct current transformer 3, an output voltage selection module 4, an output sensing module 6 and a main control module 5; the direct current transformer 3 is a transformer with multi-stage voltage output; the alternating current-to-direct current rectifying module 1 is used for rectifying input alternating current into direct current, the direct current switch module 2 is used for shunting the direct current to control the current input to the input end of the direct current transformer 3, the direct current transformer 3 is used for converting the voltage of the direct current input from the input end of the direct current transformer 3 into various voltage grades, the main control module 5 controls the output voltage selection module 4 to select the voltage output by the direct current transformer 3 as a specified voltage grade by detecting the voltage of the rechargeable battery, and the output sensing module 6 is used for outputting the voltage grade selected by the output voltage selection module 4 to the rechargeable battery; the utility model discloses a voltage level of 3 outputs of direct current transformer is selected according to rechargeable battery's voltage to main control module 5 to realized carrying out constant current constant voltage charging to the various group battery of different voltages.
As an embodiment of the present invention, the voltage class outputted by the dc transformer 3 includes a first-level output voltage, a second-level output voltage, a third-level output voltage and a fourth-level output voltage, the voltage range of the first-level output voltage corresponding to the rechargeable battery is 33.6V-40.8V, the voltage range of the second-level output voltage corresponding to the rechargeable battery is 44.8V-54.4V, the voltage range of the third-level output voltage corresponding to the rechargeable battery is 56.0V-68.0V, and the voltage range of the third-level output voltage corresponding to the rechargeable battery is 68.0V-81.6V.
Specifically, the voltage class output by the dc transformer 3 includes a first-stage output voltage, a second-stage output voltage, a third-stage output voltage, and a fourth-stage output voltage, the voltage range of the first-stage output voltage corresponding to the rechargeable battery is 33.6V to 40.8V, the voltage range of the second-stage output voltage corresponding to the rechargeable battery is 44.8V to 54.4V, the voltage range of the third-stage output voltage corresponding to the rechargeable battery is 56.0V to 68.0V, and the voltage range of the third-stage output voltage corresponding to the rechargeable battery is 68.0V to 81.6V.
As an embodiment of the present invention, referring to fig. 2, the output voltage selection module 4 includes a first selection switch, a second selection switch, and a third selection switch; the first selection switch comprises a switch S1, a terminal S1-A and a terminal S1-B, the second selection switch comprises a switch S2, a terminal S2-A and a terminal S2-B, and the third selection switch comprises a switch S3, a terminal S3-A, a terminal S3-B and a terminal Vout;
terminal S1-A is connected to pin 16 of DC transformer 3, terminal S1-B is connected to pin 15 of DC transformer 3, terminal S2-A is connected to pin 12 of DC transformer 3, terminal S2-B is connected to pin 10 of DC transformer 3, terminal S3-A is connected to terminal S1-A or terminal S1-B, terminal S3-B is connected to terminal S2-A or terminal S2-B, and terminal Vout is connected to terminal S3-A or terminal S3-B.
Specifically, referring to FIG. 2, the voltage output at terminal S1-A is the first stage output voltage, the voltage output at terminal S1-B is the second stage output voltage, the voltage output at terminal S2-A is the third stage output voltage, and the voltage output at terminal S2-B is the fourth stage output voltage;
the terminal S3-A is connected with the terminal S1-A, and when the terminal Vout is connected with the terminal S3-A, the output voltage of the output voltage selection module 4 is the first-stage output voltage;
when the terminal S3-A is connected with the terminal S1-B and the terminal Vout is connected with the terminal S3-A, the output voltage of the output voltage selection module 4 is the second stage output voltage;
when the terminal S3-B is connected with the terminal S2-A and the terminal Vout is connected with the terminal S3-B, the output voltage of the output voltage selection module 4 is the third-stage output voltage;
the output voltage of the output voltage selection block 4 is the fourth stage output voltage when the terminal S3-B is connected to the terminal S2-B and the terminal Vout is connected to the terminal S3-B.
As an embodiment of the present invention, referring to fig. 2, the output sensing module 6 includes a diode D2, a bidirectional zener diode DC1, a zener diode DZ22, a switch K1, a fuse F2, polarity capacitors C20 and C21, capacitors C10 and C11, resistors R13, R14, and R15, and a connector JP 2; the connector JP2 is an output end of the output sensing module 6, and is used for connecting a rechargeable battery;
a positive electrode connecting terminal Vout of the polar capacitor C20, a positive electrode of the polar capacitor C20 is also connected with a positive electrode of the polar capacitor C21, a positive electrode of the polar capacitor C21 is also connected with one end of the capacitor C11, one end of the capacitor C11 is also connected with one end of the resistor R14, one end of the resistor R14 is also connected with one end of the bidirectional voltage stabilizing diode DC1, one end of the bidirectional voltage stabilizing diode DC1 is respectively connected with a negative electrode of the voltage stabilizing diode DZ22 and one end of the fuse F2, the other end of the fuse F2 is connected with a first contact of the switch K1, the switch K1 is also connected with the power supply 5V, and a second contact of the switch K1 is connected with the pin 1;
one end of a capacitor C10 is connected with the cathode of a diode D2, the other end of the capacitor C10 is connected with one end of a resistor R13, the other end of the resistor R13 is connected with the anode of a diode D2, the anode of the diode D2 is also connected with the cathode of a polarity capacitor C20, the cathode of a polarity capacitor C20 is also connected with the cathode of a polarity capacitor C21, the cathode of the polarity capacitor C21 is also connected with the other end of a capacitor C11, the other end of a resistor R14 is connected with one end of a resistor R15, the other end of a capacitor C11 is also connected with the other end of a resistor R15, the other end of a resistor R15 is also grounded, the other end of a resistor R15 is also connected with the other end of a zener diode DC1, the other end of the zener diode DC1 is also connected with the anode of a zener diode DZ 59.
As an embodiment of the present invention, referring to fig. 2, the main control module 5 includes an isolated flyback power controller U2, a current detection chip U3, a diode D3, capacitors C12 and C13, a zener diode DZ23, resistors R11, R12, R16, and R17; the isolated flyback power controller U2 is used for providing constant voltage and constant current, and the current detection chip U3 is a monitor for current, power and voltage;
one end of a resistor R11 is connected with a terminal Vout, one end of a resistor R12 is connected with a connection point of one end of a capacitor C10 and the cathode of a diode D2, one end of a resistor R12 is also connected with a pin 9 of a direct current transformer 3, a pin 2 of an isolated flyback power controller U2 is respectively connected with the other end of a resistor R11 and one end of a capacitor C12, the other end of the capacitor C12 is respectively connected with a pin 3 and a pin 4 of an isolated flyback power controller U2, the other end of the capacitor C12 is also grounded, the other end of the resistor R11 is also connected with the anode of a voltage stabilizing diode DZ23, and the cathode of the voltage stabilizing diode DZ23 is respectively connected with a pin 7 of an isolated flyback power controller U2 and the other end of a;
As an embodiment of the present invention, referring to fig. 2, the ac-dc rectifier module 1 includes a connector JP1, a fuse F1, a capacitor C1, common mode inductors L1 and L2, and a rectifier bridge D1; the connector JP1 is an input end of the AC-DC rectification module 1 and is used for accessing AC; the common-mode inductors L1 and L2 are used to suppress common-mode interference present in the ac grid; the rectifier bridge D1 is composed of diodes D11, D12, D13 and D14, wherein the cathode of the diode D11 is connected with the cathode of the diode D12, the anode of the diode D13 is connected with the anode of the diode D14, the anode of the diode D11 is connected with the cathode of the diode D13, and the anode of the diode D12 is connected with the cathode of the diode D14;
As an embodiment of the present invention, referring to fig. 2, the dc switch module 2 includes an isolated flyback power controller U1, an iron core inductor L3, polar capacitors C2 and C3, capacitors C4, C5, C6, C7, C8 and C9, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R18, R19, R20, R21, R22, R23 and R24, triodes Q2 and Q3, and a MOS transistor Q1; the isolated flyback power controller U1 is used for providing constant voltage and constant current, the anode of a polarity capacitor C2 is connected with one end of an iron core inductor L3, the other end of an iron core inductor L3 is respectively connected with the anode of a polarity capacitor C3 and one end of a resistor R1, the other end of a resistor R1 is connected with one end of a resistor R2, one end of a resistor R3 is respectively connected with one end of a resistor R1 and the other end of a resistor R2, the other end of the resistor R2 is also connected with the cathode of a polarity capacitor C3, the cathode of a polarity capacitor C3 is also connected with the cathode of a polarity capacitor C2, the cathode of a polarity capacitor C3 is also grounded, one end of a resistor R1 is also connected with one end of a resistor R5, the other end of a resistor R5 is also connected with one end of a resistor R5, one end of a capacitor C4 is also connected with one end of a capacitor C4, one end of a capacitor C5 is also connected with a power supply 5V and a, the other end of the capacitor C5 and the other end of the capacitor C4 are connected and then respectively connected with the other end of the resistor R6 and one end of the resistor R23, the other end of the resistor R23 is connected with one end of the resistor R24, and the other end of the resistor R24 is respectively connected with the drain of the MOS transistor and the pin 1 of the direct current transformer 3;
pin 7 of the isolated flyback power controller U1 is respectively connected with the other end of the resistor R3 and one end of the resistor R4, the other end of the resistor R4 is grounded, pin 1 of the isolated flyback power controller U1 is respectively connected with one end of a capacitor C7 and the collector of a triode Q2, one end of a capacitor C7 is also connected with one end of a capacitor C6, one end of a capacitor C6 is also connected with one end of a resistor R7, the other end of a resistor R7 is connected with one end of a resistor R8, pin 2 of the isolated flyback power controller U1 is respectively connected with the other end of a resistor R8 and one end of a resistor R9, the other end of a resistor R9 is connected with one end of a resistor R9, the other end of a resistor R9 is grounded, the other end of the resistor R9 is also respectively connected with the other end of a capacitor C6 and the other end of a capacitor C9, the other end of the capacitor C9 is also respectively connected with pin 4 of the isolated flyback power controller U9 and one end of a resistor 3875, one end of the capacitor C8 is further connected to the collector of the transistor Q3 and the other end of the capacitor C9, the pin 6 of the isolated flyback power controller U1 is connected to the base of the transistor Q2 and the base of the transistor Q3, respectively, a connection point between the emitter of the transistor Q2 and the emitter of the transistor Q3 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to the gate of the MOS transistor Q1 and one end of the resistor R19, the other end of the resistor R19 is connected to the source of the MOS transistor and one end of the resistor R21, the other end of the resistor R20 is connected to a connection point between the other end of the resistor 19 and one end of the resistor R21, the other end of the resistor R21 is connected to one end of the resistor R22.
Specifically, referring to fig. 2, the anode of the polar capacitor C2 is further connected to the connection point of the cathode of the diode D11 and the cathode of the diode D12, and the cathode of the polar capacitor C2 is further connected to the connection point of the anode of the diode D13 and the anode of the diode D14, so that the dc power output from the ac-dc rectifier module 1 flows into the dc switch module 2.
The working principle of the AC-DC rectifier with various voltage grade outputs is explained as follows: the input end of an AC-DC conversion rectification module 1 is connected with a mains supply, the output end of an output sensing module 6 is connected with a rechargeable battery, the AC-DC conversion rectification module 1 converts 200V-240V AC into 200V-240V DC, a DC transformer 3 converts the voltage of the 200V-240V DC into 4 voltage levels, each voltage level is a constant voltage value, a main control module 5 detects the voltage of the rechargeable battery through the output sensing module 6, selects a corresponding voltage level according to charging power and feeds back the selection result to an output voltage selection module 4, the output voltage selection module 4 regulates and controls through 3 selection switches according to the selection result of the main control module 5 so that the output voltage is the voltage level selected by the main control module 5 and outputs the selected voltage level to the rechargeable battery through the output sensing module 6, thereby ensuring that the input rechargeable battery is constant current, rather than fluctuating current and voltage.
Table 1: comparison table of voltage, charging power and charging voltage of rechargeable battery
The comparison table of the voltage, the charging power and the charging voltage of the rechargeable battery is shown in table 1, and the voltage level output by the dc transformer 3 is 4 voltage levels: a first stage output voltage, a second stage output voltage, a third stage output voltage, and a fourth stage output voltage, V1 representing the first stage output voltage, V2 representing the second stage output voltage, V3 representing the third stage output voltage, and V4 representing the fourth stage output voltage; the charging power is 250W, when the main control module 5 detects that the voltage of the rechargeable battery is between 33.6V and 40.8V, the main control module 5 selects the charging voltage output to the rechargeable battery to be V1, namely 40.8V, through the output voltage selection module 4; when the main control module 5 detects that the voltage of the rechargeable battery is between 44.8V and 54.4V, the main control module 5 selects the charging voltage output to the rechargeable battery to be V2, namely 54.4V, through the output voltage selection module 4; when the main control module 5 detects that the voltage of the rechargeable battery is between 56.0V and 68.0V, the main control module 5 selects the charging voltage output to the rechargeable battery to be V3, namely 68.0V, through the output voltage selection module 4; when the main control module 5 detects that the voltage of the rechargeable battery is between 68.0V and 81.6V, the main control module 5 selects the charging voltage output to the rechargeable battery to be V4, namely 81.6V, through the output voltage selection module 4.
The control principle of the output voltage selection module 4 is as shown in FIG. 3, when the main control module 5 selects the voltage output to the rechargeable battery to be V1, the contact of the switch S3 is communicated with the terminal S3-A, and the terminal S3-A is communicated with the terminal S1-A of the switch S1; when the main control module 5 selects the voltage output to the rechargeable battery to be V2, the contact of the switch S3 is communicated with the terminal S3-A, and the terminal S3-A is communicated with the terminal S1-B of the switch S1; when the main control module 5 selects the voltage output to the rechargeable battery to be V3, the contact of the switch S3 is communicated with the terminal S3-B, and the terminal S3-B is communicated with the terminal S2-A of the switch S2; when the main control module 5 selects the voltage output to the rechargeable battery to be V4, the contact of the switch S3 communicates with the terminal S3-B and the terminal S3-B communicates with the terminal S2-B of the switch S2.
As shown in fig. 4, when the charging voltage is constant voltage and the charging current is constant current, the charging time is shortest, the charging efficiency is highest, and the damage of the constant current and the constant voltage to the rechargeable battery is also smallest, so that the service life of the rechargeable battery is prolonged.
Preferably, the model of the current detection chip U3 is INA260, and the model of the isolated flyback power controllers U1 and U2 is UCC 28730.
The embodiments of the present invention have been described in detail, but the invention is not limited to the embodiments, and those skilled in the art can make many equivalent modifications or substitutions without departing from the spirit of the present invention, and the equivalent modifications or substitutions are included in the scope of protection defined by the claims of the present application.
Claims (10)
1. The AC-DC converter with multiple voltage grade outputs is characterized by comprising an AC-DC rectifying module, a DC switch module, a DC transformer, an output voltage selection module, an output sensing module and a main control module; the direct current transformer is a transformer with multiple voltage grade outputs; the main control module is used for controlling the output voltage selection module to select the voltage output by the direct current transformer as a specified voltage level by detecting the voltage of a rechargeable battery, and the output sensing module is used for outputting the voltage level selected by the output voltage selection module to the rechargeable battery;
the input end of the alternating current-to-direct current rectifying module is connected with an alternating current power supply, the alternating current-to-direct current rectifying module is electrically connected with the direct current switch module, the direct current switch module is also electrically connected with the input end of the direct current transformer, the output end of the direct current transformer is electrically connected with the output voltage selection module, the output voltage selection module is respectively electrically connected with the output sensing module and the main control module, the output end of the output sensing module is connected with a rechargeable battery, and the output sensing module is also electrically connected with the main control module;
the alternating current is converted into direct current through the alternating current-to-direct current rectifying module, the direct current is input to the direct current transformer after being subjected to shunt processing through the direct current transformer, the direct current transformer converts the voltage of the direct current after being subjected to shunt processing into multiple voltage grades to be output to the output voltage selection module, the main control module detects the voltage of a rechargeable battery connected with the output sensing module through the output sensing module, the main control module controls the selected output voltage of the output voltage selection module to be a specified voltage grade according to the voltage of the rechargeable battery, and the output voltage selection module outputs the selected output voltage grade to the rechargeable battery through the output sensing module, so that the function of constant-current and constant-voltage charging of the rechargeable battery is achieved.
2. The ac-dc converter with multiple voltage level outputs according to claim 1, wherein the voltage level output by the dc transformer comprises a first level output voltage corresponding to the voltage range of the rechargeable battery from 33.6V to 40.8V, a second level output voltage corresponding to the voltage range of the rechargeable battery from 44.8V to 54.4V, a third level output voltage corresponding to the voltage range of the rechargeable battery from 56.0V to 68.0V, and a fourth level output voltage corresponding to the voltage range of the rechargeable battery from 68.0V to 81.6V.
3. The ac-dc converter with multiple voltage class outputs of claim 2, wherein said output voltage selection module comprises a first selection switch, a second selection switch, and a third selection switch; the first selection switch comprises a switch S1, a terminal S1-A and a terminal S1-B, the second selection switch comprises a switch S2, a terminal S2-A and a terminal S2-B, and the third selection switch comprises a switch S3, a terminal S3-A, a terminal S3-B and a terminal Vout;
the terminal S1-A is connected with a pin 16 of the DC transformer, the terminal S1-B is connected with a pin 15 of the DC transformer, the terminal S2-A is connected with a pin 12 of the DC transformer, the terminal S2-B is connected with a pin 10 of the DC transformer, the terminal S3-A is connected with the terminal S1-A or the terminal S1-B, the terminal S3-B is connected with the terminal S2-A or the terminal S2-B, and the terminal Vout is connected with the terminal S3-A or the terminal S3-B.
4. An AC-DC rectifier according to claim 3 wherein the voltage output from terminal S1-A is the first stage output voltage, the voltage output from terminal S1-B is the second stage output voltage, the voltage output from terminal S2-A is the third stage output voltage, and the voltage output from terminal S2-B is the fourth stage output voltage;
when the terminal S3-A is connected to the terminal S1-A and the terminal Vout is connected to the terminal S3-A, the output voltage of the output voltage selection module is the first stage output voltage;
when the terminal S3-A is connected to the terminal S1-B and the terminal Vout is connected to the terminal S3-A, the output voltage of the output voltage selection module is the second stage output voltage;
when the terminal S3-B is connected to the terminal S2-A and the terminal Vout is connected to the terminal S3-B, the output voltage of the output voltage selection module is the third stage output voltage;
when the terminal S3-B is connected to the terminal S2-B and the terminal Vout is connected to the terminal S3-B, the output voltage of the output voltage selection module is the fourth stage output voltage.
5. An AC-DC rectifier with multiple voltage class outputs according to claim 3, wherein the output sensing module comprises diode D2, bi-directional zener diode DC1, zener diode DZ22, switch K1, fuse F2, polarity capacitors C20 and C21, capacitors C10 and C11, resistors R13, R14 and R15, connector JP 2; the connector JP2 is an output end of the output sensing module and is used for connecting a rechargeable battery;
the positive electrode of the polar capacitor C20 is connected to the terminal Vout, the positive electrode of the polar capacitor C20 is further connected to the positive electrode of the polar capacitor C21, the positive electrode of the polar capacitor C21 is further connected to one end of the capacitor C11, one end of the capacitor C11 is further connected to one end of the resistor R14, one end of the resistor R14 is further connected to one end of the bidirectional zener diode DC1, one end of the bidirectional zener diode DC1 is connected to the negative electrode of the zener diode DZ22 and one end of the fuse F2, the other end of the fuse F2 is connected to the first contact of the switch K1, the switch K1 is further connected to the power source 5V, and the second contact of the switch K1 is connected to the pin 1 of the connector JP 2;
one end of the capacitor C10 is connected with the cathode of the diode D2, the other end of the capacitor C10 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with the anode of the diode D2, the anode of the diode D2 is also connected with the cathode of the polar capacitor C20, the cathode of the polar capacitor C20 is also connected with the cathode of the polar capacitor C21, the cathode of the polar capacitor C21 is also connected with the other end of the capacitor C11, the other end of the resistor R14 is connected with one end of the resistor R15, the other end of the capacitor C11 is also connected with the other end of the resistor R15, the other end of the resistor R15 is also grounded, the other end of the resistor R15 is also connected with the other end of the voltage stabilizing diode DC1, the other end of the zener diode DC1 is further connected to the anode of the zener diode DZ22, and the cathode of the diode D2 is further connected to the pin 9 of the DC transformer.
6. The AC-DC rectifier with multiple voltage class outputs according to claim 5, wherein the main control module comprises an isolated flyback power controller U2, a current detection chip U3, a diode D3, capacitors C12 and C13, a voltage regulator diode DZ23, resistors R11, R12, R16 and R17; the isolated flyback power controller U2 is used for providing constant voltage and constant current, and the current detection chip U3 is a monitor for current, power and voltage;
one end of the resistor R11 is connected to the terminal Vout, one end of the resistor R12 is connected to a connection point between one end of the capacitor C10 and the cathode of the diode D2, one end of the resistor R12 is further connected to a pin 9 of the dc transformer, a pin 2 of the isolated flyback power controller U2 is connected to the other end of the resistor R11 and one end of the capacitor C12, the other end of the capacitor C12 is connected to a pin 3 and a pin 4 of the isolated flyback power controller U2, the other end of the capacitor C12 is also grounded, the other end of the resistor R11 is further connected to the anode of the zener diode DZ23, and the cathode of the zener diode DZ23 is connected to a pin 7 of the isolated flyback power controller U2 and the other end of the resistor R12;
the pin 1, the pin 2 and the pin 3 of the current detection chip U3 are connected and then connected with the pin 2 of the connector JP2, the pin 14, the pin 15 and the pin 16 of the current detection chip U3 are connected and then connected with the anode of the voltage stabilizing diode DZ22, the anode of the diode D3 is connected with the pin 1 of the connector JP2, the cathode of the diode D3 is connected with one end of the resistor R16, the other end of the resistor R16 is connected to the pin 12 of the current detection chip U3 and one end of the resistor R17 respectively, the other end of the resistor R17 is connected with a pin 6 of the current detection chip U3, a pin 19 of the current detection chip U3 is respectively connected with one end of the capacitor C13 and a power supply 5V, and a pin 4, a pin 5 and a pin 8 of the current detection chip U3 are connected and then respectively connected with the other end of the capacitor C13 and the ground, and the other end of the resistor R17 is also grounded.
7. An ac-dc rectifier having multiple voltage level outputs according to claim 1, wherein said ac-dc rectifier module comprises connector JP1, fuse F1, capacitor C1, common mode inductors L1 and L2, rectifier bridge D1; the connector JP1 is an input end of the ac-dc rectifier module, and is used for accessing ac power; the common mode inductors L1 and L2 are used for suppressing common mode interference existing in an alternating current power grid; the rectifier bridge D1 is composed of diodes D11, D12, D13 and D14, wherein the cathode of the diode D11 is connected with the cathode of the diode D12, the anode of the diode D13 is connected with the anode of the diode D14, the anode of the diode D11 is connected with the cathode of the diode D13, and the anode of the diode D12 is connected with the cathode of the diode D14;
pin 1 of the connector JP1 is connected to one end of the fuse F1, the other end of the fuse F1 is connected to one end of the capacitor C1 and one end of the common mode inductor L1, pin 2 of the connector JP1 is connected to the other end of the capacitor C1 and one end of the common mode inductor L2, the other end of the common mode inductor L1 is connected to a connection point between the anode of the diode D11 and the cathode of the diode D13, and the other end of the common mode inductor L2 is connected to a connection point between the anode of the diode D12 and the cathode of the diode D14.
8. An ac-dc converter with multiple voltage class outputs according to claim 1, wherein the dc switch module comprises an isolated flyback power controller U1, a ferrite core inductor L3, polar capacitors C2 and C3, capacitors C4, C5, C6, C7, C8 and C9, resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R18, R19, R20, R21, R22, R23 and R24, transistors Q2 and Q3, and a MOS transistor Q1; the isolated flyback power controller U1 is configured to provide a constant voltage and a constant current, the positive electrode of the polarity capacitor C2 is connected to one end of the core inductor L3, the other end of the core inductor L3 is connected to the positive electrode of the polarity capacitor C3 and one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R2, one end of the resistor R3 is connected to one end of the resistor R1 and the other end of the resistor R2, the other end of the resistor R2 is further connected to the negative electrode of the polarity capacitor C3, the negative electrode of the polarity capacitor C3 is further connected to the negative electrode of the polarity capacitor C2, the negative electrode of the polarity capacitor C3 is further grounded, one end of the resistor R1 is further connected to one end of the resistor R5, the other end of the resistor R5 is connected to one end of the resistor R6, one end of the resistor R5 is further connected to one end of the capacitor C4, one end of the capacitor C4 is further connected to one end of the capacitor C5, one end of the capacitor C5 is further connected to a power supply 5V and a pin 2 of the dc transformer, the other end of the capacitor C5 is connected to the other end of the capacitor C4 and then is connected to the other end of the resistor R6 and one end of the resistor R23, the other end of the resistor R23 is connected to one end of the resistor R24, and the other end of the resistor R24 is connected to a drain of the MOS transistor and a pin 1 of the dc transformer;
a pin 7 of the isolated flyback power controller U1 is connected to the other end of the resistor R3 and one end of the resistor R4, respectively, the other end of the resistor R4 is grounded, a pin 1 of the isolated flyback power controller U1 is connected to one end of the capacitor C7 and a collector of the transistor Q2, one end of the capacitor C7 is further connected to one end of the capacitor C6, one end of the capacitor C6 is further connected to one end of the resistor R7, the other end of the resistor R7 is connected to one end of the resistor R8, a pin 2 of the isolated flyback power controller U1 is connected to the other end of the resistor R8 and one end of the resistor R9, the other end of the resistor R9 is connected to one end of the resistor R10, the other end of the resistor R10 is grounded, and the other end of the resistor R10 is further connected to the other ends of the capacitor C6 and the capacitor C7, the other end of the capacitor C7 is further connected to the pin 4 of the isolated flyback power controller U1 and one end of the capacitor C8, the other end of the capacitor C8 is connected to the pin 5 of the isolated flyback power controller U1 and one end of the resistor R20, one end of the capacitor C8 is further connected to the collector of the transistor Q3 and the other end of the capacitor C9, the pin 6 of the isolated flyback power controller U1 is connected to the base of the transistor Q2 and the base of the transistor Q3, a connection point between the emitter of the transistor Q2 and the emitter of the transistor Q3 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to the gate of the MOS transistor Q1 and one end of the resistor R19, the other end of the resistor R19 is connected to the source of the MOS transistor and one end of the resistor R21, the other end of the resistor R20 is connected to a connection point between the other end of the resistor R3619 and one end of the resistor R21, the other end of the resistor R21 is connected with one end of the resistor R22, and the other end of the resistor R22 is grounded.
9. An AC-DC rectifier with multiple voltage level output according to claim 8, wherein the anode of the polar capacitor C2 is further connected to the connection point of the cathode of the diode D11 and the cathode of the diode D12, and the cathode of the polar capacitor C2 is further connected to the connection point of the anode of the diode D13 and the anode of the diode D14, so that the DC output from the AC-DC rectifier module flows into the DC switch module.
10. The AC-DC rectifier with multiple voltage level outputs according to claim 6, wherein the current sense chip is type INA 260.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968673.7U CN212486145U (en) | 2020-06-01 | 2020-06-01 | AC-DC rectifier with multi-voltage-class output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968673.7U CN212486145U (en) | 2020-06-01 | 2020-06-01 | AC-DC rectifier with multi-voltage-class output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212486145U true CN212486145U (en) | 2021-02-05 |
Family
ID=74448207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020968673.7U Active CN212486145U (en) | 2020-06-01 | 2020-06-01 | AC-DC rectifier with multi-voltage-class output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212486145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381619A (en) * | 2021-07-16 | 2021-09-10 | 辽宁工程技术大学 | Direct current converter with wide gain range |
-
2020
- 2020-06-01 CN CN202020968673.7U patent/CN212486145U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381619A (en) * | 2021-07-16 | 2021-09-10 | 辽宁工程技术大学 | Direct current converter with wide gain range |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101499675B (en) | Charging circuit and power supply system | |
| US7688026B2 (en) | Energy storage mobile charging adapter and energy storing method for the same | |
| CN106655431B (en) | Automatic current regulation charger circuit | |
| TW201411986A (en) | Wireless battery charger and wireless battery charging system | |
| CN113054754A (en) | Double-coil inner-outer ring type induction energy-taking system | |
| CN212486145U (en) | AC-DC rectifier with multi-voltage-class output | |
| CN205544520U (en) | Automatic energy -conserving charging circuit of pressure regulating | |
| CN205249551U (en) | Emergent ball bubble lamp circuit structure of LED | |
| US5872445A (en) | Power supply device having low internal power consumption and electronic appliances using said power supply device | |
| CN105790399A (en) | Alternating current-direct current conversion charging circuit | |
| CN205846817U (en) | A kind of AC DC inverse-excitation type charging circuit and charger | |
| CN104426220A (en) | Voltage regulation circuit | |
| CN113765162A (en) | AC-DC rectifier with multi-voltage-class output | |
| CN103259295A (en) | Portable electronic device with solar charging function | |
| CN211267181U (en) | LED lamp circuit with emergency lighting function | |
| CN113765164A (en) | AC-DC converter | |
| CN212518825U (en) | Power supply circuit of mechanical timer | |
| CN219918481U (en) | Battery direct current follows switching power supply circuit | |
| CN217904256U (en) | Switching power supply circuit with passive power factor correction circuit | |
| CN214100957U (en) | Voltage bidirectional protection power supply switching circuit | |
| CN218771268U (en) | Power supply circuit with protection function | |
| CN217469526U (en) | Power supply device for agricultural robot based on common electric tricycle | |
| CN2518114Y (en) | Dynamo operation state a.c/d.c contact converter | |
| CN214100958U (en) | Power supply switching circuit with filtering function | |
| CN220628893U (en) | Photovoltaic inversion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |