CN214506640U - Anti-falling power supply device for unmanned aerial vehicle - Google Patents

Abstract

The utility model discloses a prevent power supply unit for unmanned aerial vehicle that falls, the feeder ear contains two power supplies, and first power supply is power supply battery, and the second power supply is stand-by power supply, first power supply and second power supply first earthing terminal GND altogether, and two power supplies are the load power supply simultaneously, and the load contains load 1 and load 2. The utility model discloses can realize guaranteeing load 1 that the priority is high under the abnormal conditions and continuously supply power, the abnormal conditions is the state of the equal insufficient voltage of battery and stand-by power supply.

Description

Anti-falling power supply device for unmanned aerial vehicle

Technical Field

The utility model relates to a power supply circuit field, in particular to prevent power supply unit for unmanned aerial vehicle that falls.

Background

The power supply circuit can convert an input voltage signal which changes within a certain range into a fixed output or an adjustable voltage output for a load to use, the power supply voltage required by a common load is constant voltage, and the power supply has important application in industrial control and very wide application and is widely used in various industries.

Among the prior art, when adopting battery powered, the condition of battery trouble can appear, and unmanned aerial vehicle's electrical power generating system requires more to the stable power supply of battery, otherwise can appear falling the machine, brings very big loss for the enterprise, especially when the complicated occasion of topography is used unmanned aerial vehicle, especially difficultly looks for the machine that drops after falling the machine.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of the prior art, the utility model provides a prevent power supply unit for unmanned aerial vehicle that falls can realize in the abnormal conditions, the higher solution of reliability when battery and stand-by power supply all lack of electricity, and technical scheme is as follows:

the utility model provides a prevent power supply unit for unmanned aerial vehicle that falls, power supply unit for unmanned aerial vehicle, the feed end contains two power supplies, first power supply is power supply battery, the second power supply is stand-by power supply, first power supply and second power supply are first earthing terminal GND altogether, consumer contains load 1 and load 2, the battery positive pole is connected with first diode D1 positive pole, stand-by power supply positive pole is connected with second diode D2 positive pole, first diode D1 is connected with second diode D2 negative pole, second diode D2 negative pole is connected with empty Q0 first end simultaneously, empty Q0 second end is connected with first electric capacity C1 first end, fourth switch Q4 first end, first MOS pipe Q1 drain electrode, the first input of voltage conversion circuit is connected, form electric node V1, first MOS pipe Q1 source electrode is connected with second MOS pipe Q2 drain electrode, second MOS pipe Q2 source electrode and first electric capacity C1 first electric capacity C3583 terminal, form electric node V1, first MOS pipe Q1 source electrode and second MOS pipe C2 drain electrode, A first ground terminal GND and a first end of a second capacitor C2 are connected, a second end of a second capacitor C2 is connected with a first end of a first inductor L1, a second end of a first inductor L1 is connected with a first end of a primary side of a Hall transformer T3, a second end of a primary side of the Hall transformer T3 is connected with a first end of a primary side of a second transformer T2, a second end of a primary side of a second transformer T2 is connected with a first end of a primary side of a first transformer T1, a second end of a primary side of the first transformer T1 is connected with a source of a first MOS tube Q1, the first MOS tube Q1 and the second MOS tube Q2 are conducted and turned off in a complementary mode to form a half-bridge structure, an inductor T1 of the first transformer, an inductor T2 of the second transformer, an inductor L1 and a primary side capacitor C2 form a series resonant circuit, wherein the inductance of the transformer T3 is lower than that of the inductors T1, the first transformer T2 and the L1, the secondary side of the Hall transformer T3 is negligible, a resistance R3 and a sampling current CT at two ends of the CT of the Hall transformer T3 to form a resonant circuit 3, the first end of the secondary side of a first transformer T1 is connected with the anode of a third diode, the second end of the secondary side of a first transformer T1 is connected with the anode of a fourth diode, the first end of the secondary side of a second transformer T2 is connected with the anode of a fifth diode, the second end of the secondary side of a second transformer T2 is connected with the anode of a sixth diode, the cathode of the third diode is connected with the cathode of the fourth diode, the cathode of the fifth diode, the cathode of the sixth diode, the anode of a seventh diode and the first end of a third switch Q3, the cathode of the seventh diode is connected with the first end of a third capacitor C3 and the first end of a fourth switch to form an electrical node V2, the second end of the third capacitor C3 is connected with the first end of the fourth capacitor, the first end of the fifth capacitor, the cathode of a load 2, the second grounding terminal SGND, the intermediate tap of the secondary side of the first transformer T1 and the intermediate tap of the secondary side of the second transformer T2, the third switch is connected with the second end of the fourth capacitor, The second end of the fifth capacitor is connected with the positive electrode of the load 2, the first ground terminal GND and the second ground terminal SGND are connected to two ends of a sixth capacitor C6, the sixth capacitor C6 is a safety capacitor, the second input end of the voltage conversion circuit is connected with the first ground terminal GND, and the first output end OUT 1-the second output end OUT1+ of the voltage conversion circuit is connected to two ends of the load 1.

Furthermore, in the circuit structure of the voltage conversion circuit of the power supply device, the first input end is a connection point of a first end of a sixth capacitor C11 and a first end of a second inductor L11, the second input end is a connection point of a second end of a sixth capacitor C11, the second end of the sixth capacitor C11 is connected with a first ground GND, a source of a fifth MOS transistor Q11, a cathode of an eighth diode D11, a first end of an eighth capacitor C13 and an OUT1+, a drain of the second inductor L11 is connected with a drain of the fifth MOS transistor Q11 and a first end of a seventh capacitor C12, a second end of the seventh capacitor C12 is connected with a first end of a third inductor L12 and an anode of an eighth diode D11, and a second end of the third inductor L12 is connected with a second end of the eighth capacitor C13 and an OUT 1-. The circuit can realize voltage boosting and voltage reduction, the voltage at two ends of the first load can be kept stable when the voltage of the first input end changes in a large range, the input end and the output end of the voltage conversion circuit are provided with inductors, the input current pulsation and the output current pulsation of the voltage conversion circuit can be obviously reduced, and the voltage conversion circuit is more stable to the load 1.

Furthermore, the power supply device further comprises a control circuit, wherein voltages CT1 and CT2 at two ends of the resistor R1 and voltages of the electrical nodes V1 and V2 are detected to control and output driving signals G1, S1, G2, GND, G3, G4 and GND of the first MOS, G4 and S4 which are formed by the electrical structures of the first MOS, the second MOS, the third, the fourth and the fifth MOS, the driving signals of the first MOS transistor are formed by G4 and S4, G4 and GND respectively form driving signals of the second MOS, the third, the fourth and the fifth MOS, after the empty switch Q4 is closed, the circuit is started, Q4-Q4 is disconnected, the voltage of V4 rises from 0, when the voltage of V4 rises to the first threshold, the voltage of Q4, Q4 and Q4 are turned on, the fifth MOS switch turns on in a PWM mode, the voltage of the fifth MOS transistor is turned on, the voltage of the V4-V4 is converted to the voltage of the second load 4, and the V4 is alternately stored when the voltage of the V4 is increased by the second MOS 4, the V4, the load 4, the V4, the voltage of the load is alternately stored, q3 is conducted to form OUT2+ and OUT 2-to supply power to the load 2, soft start of the circuit can be realized through the mode, starting impact current is small, consumption of a battery and a standby power supply is reduced, reliability of the circuit can be improved through arrangement of the battery and the standby power supply, even if the battery and the standby power supply are in power shortage, the control circuit detects that voltage of V1 is reduced to a third threshold value, Q1, Q2 and Q3 are disconnected, Q4 is closed, a fifth MOS tube is still conducted in a PWM mode, energy stored in C3 is charged to a capacitor C1, and meanwhile the battery and the standby power supply are also charged to the capacitor, so that power supply of the input end of a voltage conversion circuit of the load 1 is guaranteed through the Q3 and the C3 is an ultra-large-capacity capacitor to supplement voltage of a V1 point, the load 1 can be guaranteed to still work within a certain time range, the load 1 comprises a motor control module, priority level of the motor control module is highest, the load 2 is a camera module, The communication module is loaded at a lower priority. This mode can guarantee that load 1 that the priority is high still can work an end time under the abnormal conditions, guarantees that unmanned aerial vehicle can return to the journey safely.

The utility model provides a beneficial effect that technical scheme brought as follows:

a. the conversion of various types of voltage of the power supply voltage is realized, and the power supply is supplied to different types of loads;

b. the soft start is realized by arranging a switch in front of the load 2, and the switch in front of the load 2 is firstly switched off under abnormal conditions, so that the load 2 does not consume electric quantity under the abnormal conditions;

c. and a large-capacity capacitor connected with the diode in series is arranged on the secondary side of the transformer, so that the electric quantity of the input end of the load 1 with higher priority can be supplemented under the abnormal condition, and the reliability is higher.

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 description of 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 to obtain other drawings without creative efforts.

Fig. 1 is a circuit diagram of a power supply device for an unmanned aerial vehicle according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a voltage conversion circuit of a power supply device for an unmanned aerial vehicle according to an embodiment of the present invention;

fig. 3 is a circuit diagram of a power supply device control circuit for an unmanned aerial vehicle according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

In an embodiment of the present invention, a power supply device for unmanned aerial vehicle for preventing falling is provided, as shown in fig. 1, a main circuit diagram of a power supply circuit for unmanned aerial vehicle, the power supply device for unmanned aerial vehicle, the power supply end includes two power supplies, the first power supply is a power supply battery, the second power supply is a standby power supply, the first power supply and the second power supply share a ground with a first ground terminal GND, the first power supply and the second power supply discharge through a diode D1, D2, due to the reverse blocking function of the diode, the power supply with high voltage in the two can be supplied to the device, the power consumption device includes a load 1 and a load 2, the battery anode is connected with a first diode D1 anode, the standby power supply anode is connected with a second diode D2 anode, the first diode D1 is connected with a second diode D2 cathode, while the second diode D2 cathode is connected with a first end of an air switch Q0, the second end of the air switch Q0 is connected with a first end of a first capacitor C1, A first end of a fourth switch Q4, a drain electrode of a first MOS tube Q1 and a first input end of a voltage conversion circuit are connected to form an electric node V1, a source electrode of the first MOS tube Q1 is connected with a drain electrode of a second MOS tube Q2, a source electrode of a second MOS tube Q2 is connected with a second end of a first capacitor C1, a first ground end GND and a first end of a second capacitor C2, a second end of a second capacitor C2 is connected with a first end of a first inductor L1, a second end of a first inductor L1 is connected with a first end of a primary side of a Hall transformer T3, a second end of a primary side of the Hall transformer T3 is connected with a first end of a primary side of a second transformer T2, a second end of a primary side of a second transformer T2 is connected with a first end of a primary side of a first transformer T1, a second end of a primary side of a first transformer T1 is connected with a source electrode of a first MOS tube Q1, a first MOS tube Q1 and a second MOS tube Q2 are connected and disconnected in a complementary form to form a half-bridge structure, a first transformer T82923 and a second inductor T2 and a second MOS tube Q1 and a second inductor T2 are connected to form a complementary form a half-bridge structure, An inductor L1 and a capacitor C2 form a series resonant circuit, the inductance of the primary side of a transformer T3 is very low compared with that of T1, T2 and L1, neglecting, a resistor R1 is connected to two ends of the secondary side of a Hall transformer T3, voltages of currents of the sampled resonant circuit are formed at two ends of CT1 and CT2 of R1, the first end of the secondary side of a first transformer T1 is connected with the positive electrode of a third diode, the second end of the secondary side of a first transformer T1 is connected with the positive electrode of a fourth diode, the first end of the secondary side of a second transformer T2 is connected with the positive electrode of a fifth diode, the second end of the secondary side of a second transformer T2 is connected with the positive electrode of a sixth diode, the negative electrode of the third diode is connected with the negative electrode of a fourth diode, the negative electrode of the fifth diode, the negative electrode of the sixth diode, the positive electrode of a seventh diode and the first end of a third switch Q3, the negative electrode of the seventh diode is connected with the first end of a third terminal of a third capacitor C3 and the fourth switch to form an electrical node V2, the second end of the third capacitor C3 is connected to the first end of the fourth capacitor, the first end of the fifth capacitor, the negative electrode of the load 2, the second ground terminal SGND, the center tap of the secondary side of the first transformer T1, and the center tap of the secondary side of the second transformer T2, the second end of the third switch is connected to the second end of the fourth capacitor, the second end of the fifth capacitor, and the positive electrode of the load 2, the first ground terminal GND and the second ground terminal SGND are connected to the two ends of the sixth capacitor C6, the sixth capacitor C6 is a safety capacitor, the second input end of the voltage conversion circuit is connected to the first ground terminal GND, and the first output end OUT1-, and the second output end OUT1+ of the voltage conversion circuit are connected to the two ends of the load 1.

Fig. 2 is a circuit diagram of a power supply device voltage converting circuit for an unmanned aerial vehicle according to an embodiment of the present invention, the first input terminal is a first terminal of a sixth capacitor C11, a first terminal connection point of a second inductor L11, the second input terminal is a second terminal of a sixth capacitor C11 and a first ground terminal GND, a source of a fifth MOS transistor Q11, a cathode of an eighth diode D11, a first terminal of an eighth capacitor C13, an OUT1+ connection point, a drain of the second inductor L11 and a fifth MOS transistor Q11, a first terminal of a seventh capacitor C12, a second terminal of the seventh capacitor C12 and a first terminal of a third inductor L12, an anode of the eighth diode D11, a second terminal of the third inductor L12 and a second terminal of the eighth capacitor C13, and OUT 1-. The voltage conversion circuit has the characteristic that the polarity of output voltage is opposite to that of input voltage, so that boosting can be realized, voltage reduction can be realized, when the voltage of the first input end changes in a large range, the voltages of two ends of a first load can be kept stable, the input end and the output end of the voltage conversion circuit are provided with inductors, the input current ripple and the output current ripple of the voltage conversion circuit can be reduced remarkably, the voltage conversion circuit is more stable for the load 1, and the working principle of the voltage conversion circuit in the figure 2 is common knowledge in the field and is not introduced too much.

Fig. 3 is a circuit diagram of a power supply device control circuit for an unmanned aerial vehicle according to an embodiment of the present invention, which controls and outputs driving signals G1, S1, G2, GND, G3, G4, G5, and GND of a first MOS, a second MOS, a third switch, a fourth switch, and a fifth MOS by detecting voltages CT1 and CT2 at both ends of a resistor R1 and voltages at electrical nodes V1 and V2, and the electrical structure of fig. 1-2 shows that G1 and S1 form driving signals of a first MOS transistor, G1, GND, G1, and GND form driving signals of a second MOS, a third switch, a fourth switch, and a fifth MOS, after the empty switch Q1 is closed, the circuit is started, Q1-Q1 is turned off, the voltage of V1 rises from 0, when the voltage of V1 rises to a first threshold, Q1 and Q72 are turned on alternately, the fifth MOS 1 is turned on, the voltage of the load storage diode 1, PWM 1 is converted to a PWM 1, PWM 1+ OUT, when the voltage of V2 rises to a second threshold value, Q3 is conducted to form OUT2+ and OUT 2-to supply power to the load 2, soft start of the circuit can be realized through the mode, starting impact current is small, consumption of the battery and the standby power supply is reduced, reliability of the circuit can be improved through the arrangement of the battery and the standby power supply, even if the battery and the standby power supply are insufficient, the control circuit detects that the voltage of V1 drops to a third threshold value, Q1, Q2 and Q3 are disconnected, Q4 is closed, a fifth MOS tube is still conducted in a PWM mode, energy stored on C3 is charged to a capacitor C1, the battery and the standby power supply are also charged to capacitors, the two jointly guarantee power supply of the input end of a voltage conversion circuit of the load 1, C3 is an ultra-capacity capacitor, voltage of a V1 point is supplemented, the load 1 can be guaranteed to continue to work within a certain time range, the load 1 comprises a motor control module, priority level is highest, the load 2 is a load with lower priority such as a camera module, a communication module and the like. This mode can guarantee that load 1 that the priority is high still can work an end time under the abnormal conditions, guarantees that unmanned aerial vehicle can return to the journey safely.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (3)

1. The power supply device for the anti-falling unmanned aerial vehicle is characterized in that the power supply end of the power supply device for the unmanned aerial vehicle comprises two power supply sources, the first power supply source is a power supply battery, the second power supply source is a standby power supply, the first power supply source and the second power supply source are grounded at the first ground end GND in common, the electric equipment comprises a load 1 and a load 2, the anode of the battery is connected with the anode of a first diode D1, the anode of the standby power supply is connected with the anode of a second diode D2, a first diode D1 is connected with the cathode of a second diode D2, the cathode of a second diode D2 is connected with a first end of an idle switch Q0, a second end of the idle switch Q0 is connected with a first end of a first capacitor C1, a first end of a fourth switch Q4, a drain of the first MOS tube Q1 and a first input end of a voltage conversion circuit to form an electric node V1, the source of the first tube Q1 is connected with a drain of a second MOS tube Q2, and the source of the second MOS tube Q2 is connected with a first end of the first capacitor C1, A first ground terminal GND and a first end of a second capacitor C2 are connected, a second end of a second capacitor C2 is connected with a first end of a first inductor L1, a second end of the first inductor L1 is connected with a first primary side end of a Hall transformer T3, a second primary side end of the Hall transformer T3 is connected with a first primary side end of a second transformer T2, a second primary side end of the second transformer T2 is connected with a first primary side end of the first transformer T1, a second primary side end of the first transformer T1 is connected with a source of a first MOS tube Q1, two secondary sides of the Hall transformer T3 are connected with a resistor R1, a first secondary side end of the first transformer T1 is connected with a positive electrode of a third diode, a second secondary side end of the first transformer T1 is connected with a positive electrode of a fourth diode, a first secondary side end of the second transformer T2 is connected with a positive electrode of a fifth diode, a second secondary side end of the second transformer T2 is connected with a positive electrode of a sixth diode, a negative electrode of the third diode, a negative electrode of the fourth diode, The cathode of the fifth diode, the cathode of the sixth diode, the anode of the seventh diode, and the first end of the third switch Q3 are connected, the cathode of the seventh diode is connected to the first end of the third capacitor C3 and the first end of the fourth switch, forming an electrical node V2, the second end of the third capacitor C3 is connected to the first end of the fourth capacitor, the first end of the fifth capacitor, the cathode of the load 2, the second ground SGND, the center tap of the secondary side of the first transformer T1 and the center tap of the secondary side of the second transformer T2, the second end of the third switch is connected to the second end of the fourth capacitor, the second end of the fifth capacitor and the anode of the load 2, the first ground GND and the second ground SGND are connected to the two ends of the sixth capacitor C6, the second input end of the voltage conversion circuit is connected to the first ground GND, and the first output end 1-, OUT-, and the second output end OUT1+ of the voltage conversion circuit are connected to the two ends of the load 1.

2. The power supply device for the crash-proof unmanned aerial vehicle as claimed in claim 1, wherein the first input terminal of the voltage conversion circuit structure is a connection point of a first terminal of a sixth capacitor C11 and a first terminal of a second inductor L11, the second input terminal is a connection point of a second terminal of a sixth capacitor C11 and a first ground terminal GND, a source of a fifth MOS transistor Q11, a cathode of an eighth diode D11, a first terminal of an eighth capacitor C13, and an OUT1+, the second inductor L11 is connected with a drain of the fifth MOS transistor Q11 and a first terminal of a seventh capacitor C12, the second terminal of the seventh capacitor C12 is connected with a first terminal of a third inductor L12 and an anode of an eighth diode D11, and the second terminal of a third inductor L12 is connected with a second terminal of an eighth capacitor C13 and an OUT 1-.

3. The power supply device for the crash-proof unmanned aerial vehicle as claimed in claim 1, wherein the power supply device further comprises a control circuit, the control circuit controls and outputs the driving signals of the first MOS, the second MOS, the third switch, the fourth switch and the fifth MOS by detecting the voltages CT1 and CT2 at the two ends of the resistor R1 and the voltages of the electrical nodes V1 and V2.

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