WO2022068061A1 - 电源切换装置和云台 - Google Patents

电源切换装置和云台 Download PDF

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Publication number
WO2022068061A1
WO2022068061A1 PCT/CN2020/135419 CN2020135419W WO2022068061A1 WO 2022068061 A1 WO2022068061 A1 WO 2022068061A1 CN 2020135419 W CN2020135419 W CN 2020135419W WO 2022068061 A1 WO2022068061 A1 WO 2022068061A1
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WIPO (PCT)
Prior art keywords
power
power supply
supply module
tube
transmission line
Prior art date
Application number
PCT/CN2020/135419
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English (en)
French (fr)
Inventor
吕锦贤
王德君
Original Assignee
深圳市大疆创新科技有限公司
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Publication of WO2022068061A1 publication Critical patent/WO2022068061A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • the present disclosure relates to the technical field of PTZs, and in particular, to a power switching device and a PTZ.
  • At least two power supply methods one is directly powered by installing a built-in battery, and the other is powered by connecting the power supply interface on the electronic device to an external power supply.
  • the technical problem to be solved by the embodiments of the present disclosure is to provide a power switching device and a pan/tilt head, which can prevent the phenomenon of mutual backflow between the two power sources while reducing the power loss of the power conversion.
  • an embodiment of the first aspect of the present disclosure provides a power supply switching device, comprising: a first power supply module, a second power supply module and a switching circuit, the switching circuit includes a switching unit, wherein,
  • the switching unit includes a first power transmission line, a second power transmission line, and a first switch component disposed on the second power transmission line, and the output ends of the first power transmission line and the second power transmission line are both connected to the power supply end connected, the power supply terminal is used to supply power to the outside;
  • the input end of the first power transmission line and the controlled end of the first switch assembly are respectively electrically connected to the first power supply module, and the controlled end is used to control the conduction and/or of the first switch assembly. or disconnected, the input end of the second power transmission line is electrically connected to the second power supply module;
  • the first switch assembly When the first power supply module is not connected to a power supply, the first switch assembly is turned on, and the second power supply module supplies power through the power supply terminal; when the first power supply module is connected to a power supply, The first switch assembly is disconnected and powered by the first power supply module through the power supply terminal.
  • the first switch component includes a first power tube and a first diode connected in parallel, the cathode of the first diode is connected to the output end of the first power transmission line, and the first and second diodes are connected in parallel.
  • the anode of the pole tube is the input end of the second power transmission line, the controlled pole of the first power tube is the controlled end, and is electrically connected to the first power supply module, and is connected to the first power supply module In the case of a power supply, the first power supply module controls the first power tube to be disconnected;
  • the first switch tube When the voltage of the output end of the first power transmission line is greater than the input end of the second power transmission line, the first switch tube is turned off, and the power supply end is powered by the first power supply module.
  • the switching unit further includes:
  • the second switch assembly is disposed on the first power transmission line.
  • the second switch assembly In the case that the first power supply module is not connected to the power supply, the second switch assembly is configured to be in an off state, and the first power supply module is connected to the power supply. In this case, the second switch assembly is configured to be in a conducting state.
  • the second switch assembly includes:
  • a second power tube the first pole of the second power tube is used to connect to the first power supply module, the second pole of the second power tube is used to connect to the power supply terminal, the second power tube
  • the controlled pole of the tube is used to receive a control signal.
  • the control signal is used to control the second power tube to disconnect, and the first power supply module is connected to the power supply.
  • the control signal is used to control the conduction of the second power tube.
  • the second switch assembly further includes:
  • the third power tube, the first pole of the third power tube is used for grounding, the second pole of the third power tube is used to connect to the controlled pole of the second power tube, the third power tube
  • the controlled pole of the third power tube is used to receive the pulse signal, and the second pole of the third power tube is used to input the control signal to the second power tube according to the pulse signal.
  • the switching circuit further includes a slow start unit, the input end of the slow start unit is connected to the first power supply module, and the output end of the slow start unit is connected to the input end of the first power transmission line , the slow start unit is configured to control the first power supply module to input an inrush current to the first power transmission line.
  • the slow start unit includes:
  • the first pole of the fourth power tube is connected to the first power supply module, the second pole of the fourth power tube can be connected to the input end of the first power transmission line, the first power tube
  • the controlled electrodes of the four power tubes are connected to the first power supply module through a first resistor.
  • the slow start unit further includes:
  • a second diode and a fifth power tube are connected in parallel, the anode of the second diode is connected to the second pole of the fourth power tube, and the cathode of the second diode is connected to the first power tube At the input end of the power transmission line, the controlled pole of the fifth power tube can be connected to the controlled pole of the fourth power tube.
  • the slow start unit further includes:
  • the first input terminal of the comparator is connected to the first power supply module
  • the second input terminal of the comparator is connected to the second power supply module
  • the output terminal of the comparator is connected to the
  • the controlled pole of the fifth power tube is used to turn on the fifth power tube when the voltage of the first power supply module is greater than the voltage of the second power supply module. When the voltage drops to the voltage of the second power supply module when it rains, the fifth power tube is disconnected.
  • both the first power supply module and the second power supply module are DC power supply modules.
  • the first power supply module includes a USB port.
  • the second power supply module includes a VCC port.
  • the second power supply module includes a battery module.
  • the second power supply module further includes a battery chip, a first end of the battery chip is connected to the battery module, a second end of the battery chip is connected to the first power supply module, and the battery The third terminal of the chip is connected to the input terminal of the second power transmission line.
  • An embodiment of the second aspect of the present disclosure provides a pan/tilt head, including: the power switching device according to the embodiment of the first aspect of the present disclosure.
  • a switching circuit in the embodiment of the present disclosure, includes a switching unit.
  • the switching unit includes two power transmission lines.
  • the line common output end is used as the power supply end of the power switching device, and a first switch assembly is also provided on the second transmission line, and the first switch assembly can be turned off when the first power supply module is connected to the power supply to disconnect the first power supply module.
  • the second power supply module is powered by the second power transmission line, and is switched to be powered by the first power supply module through the first power transmission line, and the first switch component is turned on when the power supply of the first power supply module is disconnected to switch to the second
  • the power supply module supplies power through the second power transmission line.
  • the power supply switching device realizes the power supply switching between the first power supply module and the second power supply module through the provided first switch assembly. Power loss, on the other hand, based on the switching performance of the first switch component, mutual backflow between the first power supply module and the second power supply module can be prevented, so as to ensure the reliability and safety of power switching.
  • FIG. 1 is a schematic block diagram of an embodiment of a power switching device of the present disclosure
  • FIG. 2 is a schematic block diagram of another embodiment of a power switching device of the present disclosure.
  • FIG. 3 is a schematic block diagram of yet another embodiment of a power switching device of the present disclosure.
  • FIG. 4 is a schematic circuit diagram of an embodiment of a power switching device of the present disclosure.
  • FIG. 5 is a schematic circuit diagram of another embodiment of a power switching device of the present disclosure.
  • FIG. 6 is a partial circuit schematic diagram of an embodiment of a power switching device of the present disclosure.
  • FIG. 7 is a schematic diagram of the circuit board connection of the gimbal embodiment of the present disclosure.
  • Power switching device 102 first power supply module, 104 second power supply module, 106 switching unit, 1062 first power transmission line, 1064 second power transmission line, 1066 first switch assembly, 1068 second switch assembly, 108 slow start unit, 110 power supply terminal, 110 battery chip.
  • a preferred embodiment of the present disclosure provides a pan/tilt head on which a load is disposed.
  • the load is a camera module.
  • the load may also be other, such as a microcomputer or a projection device.
  • the gimbal can be a single-axis gimbal, a dual-axis gimbal, and a three-axis gimbal.
  • the power switching apparatus includes:
  • the first power supply module 102 , the second power supply module 104 and the switching circuit, the switching circuit includes a switching unit 106 .
  • the first power supply module 102 and the second power supply module 104 are both DC power supply modules.
  • the first power supply module 102 includes a USB port.
  • the second power supply module 104 includes a VCC port or a battery module.
  • the first power supply module 102 can be connected to the first input terminal and the second input terminal of the switching unit 106, respectively, and the second power supply module 104 is connected to the input terminal of the second power transmission line.
  • the switching unit is connected to the power supply terminal 110, and the power supply terminal 110 is used for outputting a power supply signal according to the input signal of the input terminal of the second power transmission line.
  • the power supply terminal 110 is configured to output a power supply signal according to the input signals of the first input terminal and the second input terminal, and stop outputting the power supply signal.
  • the switching unit 106 includes a module connecting the first power supply module 102 and the power supply terminal 110 , a module connecting the second power supply module 104 and the power supply terminal 110 , and controlling the conduction or disconnection between the second power supply module 104 and the power supply terminal 110 module.
  • the switching unit 106 includes a first power transmission line, a second power transmission line, and a first switch component 1066 disposed on the second power transmission line.
  • the outputs of the first power transmission line and the second power transmission line are The terminals are all connected to the power supply terminal 110 to output the power supply signal;
  • the first input terminal is the input terminal of the first power transmission line, and the second input terminal is the controlled terminal of the first switch component 1066 , that is, the input end of the first power transmission line 1062 and the controlled end of the first switch component 1066 are respectively electrically connected to the first power supply module, and the controlled end is used to control the first switch component 1066 is turned on and/or off, the input end of the second power transmission line 1064 is electrically connected to the second power supply module 104 .
  • the first switch assembly 1066 When the first power supply module 102 is not connected to a power supply, the first switch assembly 1066 is turned on, and the second power supply module 104 supplies power through the power supply terminal 110; when the first power supply module 102 is connected In the case of power supply, the first switch assembly 1066 is disconnected, and the first power supply module 102 supplies power through the power supply terminal 110 .
  • the power supply terminal 110 may be regarded as a power supply port, which is electrically connected with other devices to realize external power supply, and the power supply port may specifically be a USB port, a serial interface, a parallel interface, or the like.
  • first switch component 1066 may be a switch component with a delay function to ensure reliable switching between the first power supply module 102 and the second power supply module 104 .
  • the first switch component 1066 may include a parallel-connected switching device and a unidirectional conduction device.
  • the switching device When the first power supply module 102 is connected to the power supply, the switching device is turned off, and the cathode voltage of the unidirectional conduction device rises to be greater than the anode voltage.
  • the unidirectional conduction device In the case of voltage, the unidirectional conduction device is turned off, the second power supply module 104 stops power supply, and the first power supply module 102 starts to supply power.
  • the switching unit 106 includes two power transmission lines, and each power transmission line is provided with an input end to be connected to the first power supply module 102 and the second power supply module 104 correspondingly, and the two power transmission lines
  • the line common output terminal is used as the power supply terminal 110 of the power switching device, and a first switch component 1066 is also provided on the second transmission line.
  • the first switch component 1066 can be turned off when the first power supply module 102 is connected to the power supply, In order to disconnect the power supply of the second power supply module 104 through the second power transmission line, and switch to the first power supply module 102 to supply power through the first power transmission line, the first switch component 1066 conducts the power supply when the first power supply module 102 is disconnected from the power supply. to switch to the second power supply module 104 to supply power through the second power transmission line again.
  • the power supply switching device realizes the power supply switching between the first power supply module 102 and the second power supply module 104 through the provided first switch component 1066.
  • the power loss of power conversion on the other hand, based on the switching performance of the first switch component 1066, can prevent mutual backflow between the first power supply module 102 and the second power supply module 104 to ensure the reliability and safety of power switching.
  • the first switch component 1066 includes a first power transistor Q1 and a first diode D1 connected in parallel, that is, the switching device is the first power transistor Q1, and the single
  • the conduction device is a first diode D1
  • the cathode of the first diode D1 is connected to the output end of the first power transmission line
  • the anode of the first diode D1 is the second power transmission line
  • the controlled terminal of the first power transistor Q1 is the controlled terminal of the first switch component 1066 , and is electrically connected to the first power supply module 102 .
  • the first power supply module When the first power supply module is connected to a power supply, the first power supply module controls the first power tube to be disconnected.
  • the first switch tube D1 When the voltage of the output terminal of the first power transmission line 1062 is greater than the input terminal of the second power transmission line 104 , the first switch tube D1 is turned off, and the power supply terminal 110 is powered by the first power supply module 102 .
  • the first power transistor Q1 and the first diode D1 connected in parallel are used as the first switch component 1066, the anode of the first diode D1 is connected to the second power supply module 104, and the first diode D1 is connected to the second power supply module 104.
  • the cathode of the first power tube Q1 is connected to the output end of the first power transmission line, the controlled electrode of the first power tube Q1 is connected to the first power supply module 102, and the other two electrodes of the first power tube Q1 are connected in parallel with the first diode D1.
  • the first power transistor Q1 is turned off under the action of the voltage applied by the first power supply module 102 and the second power supply module 104.
  • the first power The power transistor Q1 When the first power supply module 102 is not connected to the power supply, the first power The power transistor Q1 is turned on under the action of the voltage applied by the second power supply module 104 , so as to prevent the first power supply module 102 from backflowing the power supply current to the second power supply module 104 .
  • the first diode D1 When the voltage applied by the first power supply module 102 is lower than the voltage applied by the second power supply module 104, the first diode D1 is turned on, and the second power supply module 104 is still powered, and the voltage applied by the first power supply module 102 rises to greater than When the voltage applied by the second power supply module 104 is applied, the first diode D1 is turned off to switch to be powered by the first power supply module 102 , thereby ensuring the reliability of power supply and preventing the output voltage of the power supply terminal 110 from being unstable.
  • the first power transistor Q1 may be a triode, a MOS transistor or an IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor).
  • IGBT Insulated Gate Bipolar Transistor, insulated gate bipolar transistor
  • the power transistor when used as a switch, it works in the saturated operating region (on) and the cut-off region (off), and there is a conductance modulation effect when it is on, with low on-resistance, low on-voltage drop, and low static loss. .
  • the on-resistance has a negative temperature coefficient.
  • the MOS tube voltage control element only needs to absorb or release current from the gate when switching, so the driving loss is small.
  • the switching unit 106 further includes: a second switch component 1068 , which is disposed on the first power transmission line, and when the first power supply module 102 is not connected to a power source Next, the second switch assembly 1068 is configured to be in an off state, and when the first power supply module 102 is connected to a power source, the second switch assembly 1068 is configured to be in an on state. Second switch assembly 1068
  • the second switch assembly 1068 is used to control the conduction or disconnection of the first power transmission line, specifically, the first power supply module 102 is connected to
  • the second switch component 1068 is triggered and turned on, so that the first power supply module 102 can reliably supply power through the first power transmission line, and can prevent the voltage mutation of the output end of the first power transmission line, and ensure the reliability of the power supply module switching. .
  • the second switch component 1068 includes: a second power transistor Q2, the first pole of which is used to connect to the first power transistor Q2 In the power supply module 102 , the second pole of the second power tube Q2 is used for connecting to the power supply terminal 110 , and the controlled pole of the second power tube Q2 is used for receiving control signals.
  • the control signal is used to control the second power tube Q2 to be disconnected, and when the first power supply module 102 is connected to the power supply, the control signal is used to control the second power Tube Q2 is turned on
  • the second power transistor Q2 may be a triode, a MOS transistor or an IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor).
  • IGBT Insulated Gate Bipolar Transistor, insulated gate bipolar transistor
  • the first electrode and the second electrode (respectively the source electrode and the drain electrode, or the emitter electrode and the collector electrode) of the second power transistor Q2 are respectively It is connected with the first power transmission line to control the on-off of the first power supply line by receiving the control signal through the controlled electrode, so as to improve the reliability and safety of the power signal transmission of the first power supply line.
  • the second switch assembly 1068 further includes: a third power transistor Q3, the first pole of the third power transistor Q3 is used for grounding, the third power transistor Q3 The second pole of Q3 is used to connect to the controlled pole of the second power transistor Q2, the controlled pole of the third power transistor Q3 receives the pulse signal, and the second pole of the third power transistor Q3 is used for The pulse signal inputs the control signal to the second power transistor Q2.
  • a third power transistor Q3 is further set, the base of the third power transistor Q3 receives the pulse signal, and the third power transistor Q3 transmits the pulse signal.
  • the electrode is grounded, and the collector of the third power transistor Q3 is connected to the controlled electrode of the second power transistor Q2, so as to transmit a signal to the controlled electrode through the collector to control the opening and closing of the second power transistor Q2.
  • the switching circuit further includes a slow start unit 108 , the input end of the slow start unit 108 is connected to the first power supply module 102 , and the slow start unit 108 is The output terminal is connected to the input terminal of the first power transmission line 1062 , and the slow-start unit 108 is configured to control the first power supply module 102 to input an inrush current to the first power transmission line 1062 .
  • the switching circuit is further provided with a slow-start unit 108.
  • the slow-start unit 108 By setting the slow-start unit 108, on the one hand, when the first power supply module 102 is connected to the power supply, the input current is prevented from over-current.
  • the setting of the slow start unit 108 makes the voltage transmitted from the first power supply module 102 to the power supply terminal 110 gradually increase, and when the voltage rises to greater than When the voltage of the second power supply module 104 is turned off, the first diode D1 is turned off, so as to realize the smooth switching from the second power supply module 104 to the first power supply module 102, and by adjusting the voltage parameters of the power tube, the second power supply module 104 Switching with the first power supply module 102 has more flexible adjustability.
  • the slow start unit 108 includes: a fourth power transistor Q4 , and a first pole of the fourth power transistor Q4 is connected to the first power supply module 102 , the second pole of the fourth power transistor Q4 can be connected to the input end of the first power transmission line 1062.
  • the controlled pole of the fourth power transistor Q4 is connected to the The first power supply module 102 .
  • the fourth power transistor Q4 is used as a specific implementation device for slow start, and the controlled electrode of the fourth power transistor Q4 is connected to the first power supply module 102 through the first resistor R1 to prevent the A current surge occurs when a power supply module 102 is connected to a power supply.
  • the slow start unit 108 further includes: a second diode D2 and a fifth power transistor Q5 connected in parallel, and the anode of the second diode D2 is connected to the second pole of the fourth power tube Q4, and the cathode of the second diode D2 is connected to the first input end of the switching unit 106.
  • the fifth power tube Q5 receives The gate electrode is connected to the gate electrode of the fourth power transistor Q4 through the second resistor R2.
  • the slow start unit 108 is further provided with a fifth power transistor Q5 and a second diode D2 connected in parallel on the basis of the fourth power transistor Q4, and the anode of the second diode D2 is connected to the second diode D2.
  • the cathode of the second diode D2 is connected to the power supply terminal 110.
  • the smooth switching performance can be further improved.
  • the slow-start unit 108 further includes: a comparator Q, a first input terminal of the comparator Q is connected to the first power supply module 102, a second input terminal of the comparator Q is connected to the first power supply module 102 The input terminal is connected to the second power supply module 104, and the output terminal of the comparator Q is connected to the controlled electrode of the fifth power transistor Q5, so that the voltage of the first power supply module 102 is greater than that of the second power supply module 102.
  • the fifth power transistor Q5 is turned on, and when the voltage of the first power supply module 102 drops to the voltage of the second power supply module 104, the The fifth power tube Q5 is disconnected.
  • the slow start unit 108 further includes a comparator Q, the first input terminal of the comparator Q is connected to the first power supply module 102, so that the first power supply module 102 inputs the first voltage to the comparator Q, and compares the The second section of the comparator Q is connected to the second power supply module 104, so that the second power supply module 104 inputs the second voltage to the comparator Q, and when the first voltage is greater than the second voltage, it indicates that the first power supply module 102 is connected power supply, and can output a stable power supply signal.
  • the output signal of the comparator Q controls the conduction of the fifth power tube Q5, and the first power supply module 102 controls the conduction of the fourth power tube Q4, and the second power tube Q4 is turned on.
  • the power transistor Q2 is configured to be in an on state, and switches the second power supply module 104 to the first power supply module 102 for power supply.
  • the second power supply module 104 further includes a battery chip 112 , a first end of the battery chip 112 is connected to the battery module, and a second end of the battery chip 112 is connected to the battery module.
  • the terminal is connected to the first power supply module 102
  • the third terminal of the battery chip 112 is connected to the input terminal of the second power transmission line 104 .
  • the switching unit 106 realizes the switching of the power supply module, that is, the power supply.
  • the USB port is not connected to the power supply, and the battery supplies power to the power supply terminal 110 through the battery chip 112.
  • the first power tube Q1 is turned on, and the fourth power tube Q4, the fifth power tube Q5, and the second power tube Q2 are turned off to prevent the battery Pour back to the USB port.
  • the USB port When the USB port is connected, the USB port first turns off the first power tube Q1 to prevent the USB port from backflowing to the battery.
  • the battery is powered by the diode connected in parallel with the first power tube Q1 to supply power to the power supply terminal 110.
  • the fourth power tube Q4 starts slowly and works at the same time.
  • the comparator Q turns on the fifth power transistor Q5, and the voltage of the power supply terminal 110 is switched from the battery voltage to the USB port voltage.
  • the comparator Q controls the fifth power transistor Q5 to turn off.
  • the power supply terminal 110 is provided by the battery voltage through the diode connected in parallel with the first power transistor Q1, and the USB port continues to drop. After that, the first power transistor Q1 is turned on, and the voltage of the power supply terminal 110 is switched from the USB port voltage to the battery voltage.
  • the USB port when the first power supply module 102 is the power supply terminal of the USB port, and the second power supply module 104 is the VCC port, the USB port is not connected to the power supply, and the VCC port supplies power to the port 110 through the first power transistor Q1, and the first power supply module 104 is the VCC port.
  • a power transistor Q1 is in an on state
  • the fourth power transistor Q4/fifth power transistor Q5/second power transistor Q2 is in an off state to prevent BAT from being backflowed to the USB port.
  • the USB port When the USB port is connected, the USB port first turns off the first power transistor Q1 to prevent the USB port from backflowing to the VCC port.
  • the VCC port is powered by a diode connected in parallel with the first power transistor Q1 to supply power to the power supply terminal 110, and the fourth power transistor Q4 starts to work slowly. Meanwhile, when the voltage of the USB port is higher than a certain voltage, the comparator Q turns on the fifth power transistor Q5, and the voltage of the power supply terminal 110 is switched from the voltage of the VCC port to the voltage of the USB port.
  • the voltage of the USB port will drop.
  • the comparator Q controls the fifth power tube Q5 to turn off.
  • the power supply terminal 110 is provided by the VCC port voltage through the diode connected in parallel with the first power tube Q1.
  • the USB port After the drop continues, the first power transistor Q1 is turned on, and the voltage of the power supply terminal 110 is switched from the USB port voltage to the VCC port voltage.
  • the power is supplied from the USB port whether or not the VCC port is inserted.
  • An embodiment of a pan/tilt according to the present disclosure includes: the power switching device described in the above embodiment.
  • the first circuit board 20 is the main control board of the gimbal, and is provided with a controller 202 , an FPC connector 204 , a first connector 206 and a second connector 208 , the first connector 206 is used for connecting with the power supply terminal in the power switching device 10 described in the above embodiment, and the second connector 208 is used for connecting with the display screen 50 .
  • the second circuit board 30 is an ESC and is used to drive the motor 40 to operate.
  • the second circuit board 30 is provided with an FPC connector 304 for electrical connection with the first circuit board, the driving chip 302 and the Hall chip 306, and the driving chip 302 is connected to the motor 40 .
  • the terms “first”, “second” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “plurality” refers to two or two above, unless otherwise expressly defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense. For example, “connected” can be a fixed connection, a detachable connection, or an integral connection; “connected” can be It is directly connected or indirectly connected through an intermediary.
  • the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

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Abstract

一种电源切换装置和云台，涉及云台技术领域，实现了在降低电源转换的功率损耗的同时，防止两路电源出现相互倒灌的现象。电源切换装置(10)，包括：第一供电模块(102)、第二供电模块(104)与切换电路，切换电路包括切换单元(106)，切换单元(106)包括第一输电线路(1062)、第二输电线路(1064)以及设置在第二输电线路(1064)上的第一开关组件(1066)；第一输电线路(1062)的输入端与第一开关组件(1066)的受控端分别与第一供电模块(102)电连接，受控端用于控制第一开关组件(1066)的导通和/或断开，第二输电线路(1064)的输入端与第二供电模块(104)电连接；在第一供电模块(102)未连接电源的情况下，第一开关组件(1066)导通，由第二供电模块(104)通过供电端(110)供电；在第一供电模块(102)连接电源的情况下，第一开关组件(1066)被断开，并由第一供电模块(102)通过供电端(110)供电。

Description

电源切换装置和云台
本申请要求在2020年09月30日提交中国专利局、申请号为202022223973.5、发明名称为“电源切换装置和云台”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及云台技术领域，特别是涉及一种电源切换装置和一种云台。
背景技术
针对云台等电子设备，通常包括至少两种供电方式，一种通过安装自带电池直接供电，另一种通过将电子设别上的供电接口连接外接电源进行供电。
相关技术中，使用自带电池供电时，如果***外接电源，在通过充电芯片的升降压后，供电才会切到外接电源上，上述切换方式，一方面，导致产生电源转换的功率损耗，另一方面，容易出现两路电源的相互倒灌。
概述
本公开实施例所要解决的技术问题是提供一种电源切换装置和云台，在降低电源转换的功率损耗的同时，防止两路电源出现相互倒灌的现象。
为了解决上述问题，本公开第一方面的实施例提供了一种电源切换装置，包括：第一供电模块、第二供电模块与切换电路，所述切换电路包括切换单元，其中，
所述切换单元包括第一输电线路、第二输电线路以及设置在所述第二输电线路上的第一开关组件，所述第一输电线路与所述第二输电线路的输出端均与供电端连接，所述供电端用于向外供电；
所述第一输电线路的输入端与所述第一开关组件的受控端分别与所述第一供电模块电连接，所述受控端用于控制所述第一开关组件的导通和/或断开，所述第二输电线路的输入端与所述第二供电模块电连接；
在所述第一供电模块未连接电源的情况下，所述第一开关组件导通，由所述第二供电模块通过所述供电端供电；在所述第一供电模块连接电源的情 况下，所述第一开关组件被断开，并由所述第一供电模块通过所述供电端供电。
可选地，所述第一开关组件包括并联的第一功率管与第一二极管，所述第一二极管的阴极连接至所述第一输电线路的输出端，所述第一二极管的阳极为所述第二输电线路的输入端，所述第一功率管的受控极为所述受控端，并与所述第一供电模块电连接，在所述第一供电模块连接电源的情况下，所述第一供电模块控制所述第一功率管断开；
在所述第一输电线路的输出端的电压大于所述第二输电线路的输入端的情况下，所述第一开关管截止，所述供电端由所述第一供电模块供电。
可选地，所述切换单元还包括：
第二开关组件，设置在第一输电线路上，在所述第一供电模块未连接电源的情况下，所述第二开关组件被配置为断开状态，在所述第一供电模块连接电源的情况下，所述第二开关组件被配置为导通状态。
可选地，所述第二开关组件包括：
第二功率管，所述第二功率管的第一极用于连接至所述第一供电模块，所述第二功率管的第二极用于连接至所述供电端，所述第二功率管的受控极用于接收控制信号，在所述第一供电模块未连接电源的情况下，所述控制信号用于控制所述第二功率管断开，在所述第一供电模块连接电源的情况下，所述控制信号用于控制所述第二功率管导通。
可选地，所述第二开关组件还包括：
第三功率管，所述第三功率管的第一极用于接地，所述第三功率管的第二极用于连接至所述第二功率管的受控极，所述第三功率管的受控极用于接收脉冲信号，所述第三功率管的第二极用于根据所述脉冲信号向所述第二功率管输入所述控制信号。
可选地，所述切换电路还包括缓启动单元，所述缓启动单元的输入端连接至所述第一供电模块，所述缓启动单元的输出端连接至所述第一输电线路的输入端，所述缓启动单元用于控制所述第一供电模块向所述第一输电线路输入冲击电流。
可选地，所述缓启动单元包括：
第四功率管，所述第四功率管的第一极连接至所述第一供电模块，所述第四功率管的第二极能够连接至所述第一输电线路的输入端，所述第四功率管的受控极通过第一电阻连接至所述第一供电模块。
可选地，所述缓启动单元还包括：
并联的第二二极管与第五功率管，所述第二二极管的阳极连接至所述第四功率管的第二极，所述第二二极管的阴极连接至所述第一输电线路的输入端，所述第五功率管的受控极能够连接至所述第四功率管的受控极。
可选地，所述缓启动单元还包括：
比较器，所述比较器的第一输入端连接至所述第一供电模块，所述比较器的第二输入端连接至所述第二供电模块，所述比较器的输出端连接至所述第五功率管的受控极，以在所述第一供电模块的电压大于所述第二供电模块的电压的情况下，使所述第五功率管导通，在所述第一供电模块的电压下降至下雨所述第二供电模块的电压的情况下，使所述第五功率管断开。
可选地，所述第一供电模块与所述第二供电模块均为直流供电模块。
可选地，所述第一供电模块包括USB端口。
可选地，所述第二供电模块包括VCC端口。
可选地，所述第二供电模块包括电池模块。
可选地，所述第二供电模块还包括电池芯片，所述电池芯片的第一端连接至所述电池模块，所述电池芯片的第二端连接至所述第一供电模块，所述电池芯片的第三端连接至所述第二输电线路的输入端。
本公开第二方面的实施例提供了一种云台，包括：如本公开第一方面的实施例所述的电源切换装置。
本公开实施例通过设置切换电路，切换电路包括切换单元，切换单元包括两条输电线路，每条输电线路分别设置输入端，以对应连接至第一供电模块与第二供电模块，并且两条输电线路共用输出端作为该电源切换装置的供电端，在第二输电线路上还设置有第一开关组件，第一开关组件能够在第一供电模块接入电源的情况下关断，以断开第二供电模块通过第二输电线路的供电，并切换至由第一供电模块通过第一输电线路供电，第一开关组件在第一供电模块断开电源的情况下导通，以重新切换至第二供电模块通过第二输电线路供电。
该电源切换装置通过设置的第一开关组件实现第一供电模块与第二供电模块之间的供电切换，一方面，在保证电源切换的稳定性的同时，不会在供电芯片上产生电源转换的功率损耗，另一方面，基于第一开关组件的开关性能，能够防止第一供电模块与第二供电模块之间产生相互倒灌，以保证电源切换的可靠性与安全性。
上述说明仅是本公开技术方案的概述，为了能够更清楚了解本公开的技术手段，而可依照说明书的内容予以实施，并且为了让本公开的上述和其它目的、特征和优点能够更明显易懂，以下特举本公开的具体实施方式。
附图简述
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本公开的一种电源切换装置实施例的示意框图；
图2是本公开的另一种电源切换装置实施例的示意框图；
图3是本公开的再一种电源切换装置实施例的示意框图；
图4是本公开的一种电源切换装置实施例的电路示意图；
图5是本公开的另一种电源切换装置实施例的电路示意图；
图6是本公开的一种电源切换装置实施例的局部电路示意图；
图7是本公开的云台实施例的电路板连接示意图。
其中，图1至图7中附图标记与部件名称之间的对应关系为：
10电源切换装置，102第一供电模块，104第二供电模块，106切换单元，1062第一输电线路，1064第二输电线路，1066第一开关组件，1068第二开关组件，108缓启动单元，110供电端，110电池芯片。
详细描述
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
需要说明的是，当组件被称为“固定于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本公开的技术领域的技术人员通常理解的含义相同。本文中在本公开的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本公开。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
下面结合附图，对本公开的一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
本公开较佳实施方式提供一种云台，其上设置有负载。在本实施例中，负载为相机模组。当然，在其他实施例中，负载也可以为其他，例如微型电脑或投影设备等。云台为可以为单轴云台，双轴云台以及三轴云台等。
参照图1，示出了本公开的一种电源切换装置实施例的示意框图，电源切换装置，包括：
第一供电模块102、第二供电模块104与切换电路，所述切换电路包括切换单元106。
其中，所述第一供电模块102与所述第二供电模块104均为直流供电模块。
所述第一供电模块102包括USB端口。
所述第二供电模块104包括VCC端口或电池模块。
所述第一供电模块102能够分别连接至所述切换单元106的第一输入端与第二输入端，所述第二供电模块104连接至所述第二输电线路的输入端，在所述第一供电模块102未连接电源的情况下，所述切换单元连接至供电端110，供电端110用于根据所述第二输电线路的输入端的输入信号输出电源信号，在所述第一供电模块102连接电源的情况下，所述供电端110用于根据所述第一输入端与所述第二输入端的输入信号输出电源信号，并停止输出所述电源信号。
其中，切换单元106包括连通第一供电模块102与供电端110的模块，连通第二供电模块104与供电端110的模块，以及控制第二供电模块104与供电端110之间导通或断开的模块。
具体的，所述切换单元106包括第一输电线路、第二输电线路以及 设置在所述第二输电线路上的第一开关组件1066，所述第一输电线路与所述第二输电线路的输出端均与供电端110连接，以输出所述电源信号；所述第一输入端为所述第一输电线路的输入端，所述第二输入端为所述第一开关组件1066的受控端，即所述第一输电线路1062的输入端与所述第一开关组件1066的受控端分别与所述第一供电模块电连接，所述受控端用于控制所述第一开关组件1066的导通和/或断开，所述第二输电线路1064的输入端与所述第二供电模块104电连接。
在所述第一供电模块102未连接电源的情况下，所述第一开关组件1066导通，由所述第二供电模块104通过所述供电端110供电；在所述第一供电模块102连接电源的情况下，所述第一开关组件1066被断开，并由所述第一供电模块102通过所述供电端110供电。
其中，供电端110可以视为供电端口，通过与其他装置进行电连接，实现向外部供电，供电端口具体可以为USB端口、串行接口与并行接口等。
另外，第一开关组件1066可以为具有延时功能的开关组件，以保证第一供电模块102与第二供电模块104之间的可靠切换。
具体地，第一开关组件1066可以包括并联的开关器件与单向导通器件，在第一供电模块102接入电源的情况下，开关器件断开，在单向导通器件的阴极电压上升至大于阳极电压的情况下，单向导通器件截止，第二供电模块104停止供电，第一供电模块102开始供电。
在该实施例中，通过设置切换单元106，切换单元106包括两条输电线路，每条输电线路分别设置输入端，以对应连接至第一供电模块102与第二供电模块104，并且两条输电线路共用输出端作为该电源切换装置的供电端110，在第二输电线路上还设置有第一开关组件1066，第一开关组件1066能够在第一供电模块102接入电源的情况下关断，以断开第二供电模块104通过第二输电线路的供电，并切换至由第一供电模块102通过第一输电线路供电，第一开关组件1066在第一供电模块102断开电源的情况下导通，以重新切换至第二供电模块104通过第二输电线路供电。
该电源切换装置通过设置的第一开关组件1066实现第一供电模块102 与第二供电模块104之间的供电切换，一方面，在保证电源切换的稳定性的同时，不会在供电芯片上产生电源转换的功率损耗，另一方面，基于第一开关组件1066的开关性能，能够防止第一供电模块102与第二供电模块104之间产生相互倒灌，以保证电源切换的可靠性与安全性。
参照图4与图5，在本公开的一个实施例中，所述第一开关组件1066包括并联的第一功率管Q1与第一二极管D1，即开关器件为第一功率管Q1，单向导通器件为第一二极管D1，所述第一二极管D1的阴极连接至所述第一输电线路的输出端，所述第一二极管D1的阳极为所述第二输电线路的输入端，所述第一功率管Q1的受控极为所述第一开关组件1066的受控端，并与所述第一供电模块102电连接。
在所述第一供电模块连接电源的情况下，所述第一供电模块控制所述第一功率管断开。
在所述第一输电线路1062的输出端的电压大于所述第二输电线路104的输入端的情况下，所述第一开关管D1截止，所述供电端110由所述第一供电模块102供电。
在该实施例中，采用并联的第一功率管Q1与第一二极管D1作为第一开关组件1066，第一二极管D1的阳极连接至第二供电模块104，第一二极管D1的阴极连接至第一输电线路的输出端，第一功率管Q1的受控极连接至第一供电模块102，第一功率管Q1的另外两个电极与第一二极管D1并联，在第一供电模块102连接电源的情况下，第一功率管Q1在第一供电模块102与第二供电模块104施加的电压的作用下截止，在第一供电模块102未连接电源的情况下，第一功率管Q1在第二供电模块104施加的电压的作用下导通，以防止第一供电模块102将供电电流倒灌至第二供电模块104。
在第一供电模块102施加的电压小于第二供电模块104施加的电压时，第一二极管D1导通，仍由第二供电模块104供电，在第一供电模块102施加的电压上升至大于第二供电模块104施加的电压时，第一二极管D1截止，以切换至由第一供电模块102供电，从而保证供电的可靠性，防止供电端110输出电压出现不稳定的现象。
其中，第一功率管Q1可以为三极管、MOS管或IGBT(Insulated Gate Bipolar Transistor，绝缘栅双极型晶体管)。
具体地，功率三极管用作开关时候，工作在饱和工作区域(导通)和截止区(关断)，导通时候存在电导调制效应，导通电阻小，导通压降小，静态损耗较小。导通电阻为负温度系数。
MOS管电压控制元件，仅仅在开关时候需要从栅极吸收或者释放电流，因此驱动损耗较小。
参照图2所示，在本公开的一个实施例中，所述切换单元106还包括：第二开关组件1068，设置在第一输电线路上，在所述第一供电模块102未连接电源的情况下，所述第二开关组件1068被配置为断开状态，在所述第一供电模块102连接电源的情况下，所述第二开关组件1068被配置为导通状态。第二开关组件1068
在该实施例中，通过在第一输电线路上设置第二开关组件1068，第二开关组件1068用于控制第一输电线路的导通或断开，具体地，在第一供电模块102接入电源的情况下，第二开关组件1068被触发导通，以实现第一供电模块102通过第一输电线路可靠供电，并且能够防止第一输电线路的输出端的电压突变，保证供电模块切换的可靠性。
参照图4与图5，在本公开的一个实施例中，所述第二开关组件1068包括：第二功率管Q2，所述第二功率管Q2的第一极用于连接至所述第一供电模块102，所述第二功率管Q2的第二极用于连接至所述供电端110，所述第二功率管Q2的受控极用于接收控制信号，在所述第一供电模块102未连接电源的情况下，所述控制信号用于控制所述第二功率管Q2断开，在所述第一供电模块102连接电源的情况下，所述控制信号用于控制所述第二功率管Q2导通
其中，第二功率管Q2可以为三极管、MOS管或IGBT(Insulated Gate Bipolar Transistor，绝缘栅双极型晶体管)。
在该实施例中，通过采用第二功率管Q2作为第二开关组件1068，第二功率管Q2的第一极与第二极(分别为源极与漏极，或者发射极与集电极)分别与第一输电线路连接，以通过受控极接收控制信号控制第一 供电线路的通断，以提升第一供电线路输送电源信号的可靠性与安全性。
参照图6，在本公开的一个实施例中，所述第二开关组件1068还包括：第三功率管Q3，所述第三功率管Q3的第一极用于接地，所述第三功率管Q3的第二极用于连接至所述第二功率管Q2的受控极，所述第三功率管Q3的受控极接收脉冲信号，所述第三功率管Q3的第二极用于根据所述脉冲信号向所述第二功率管Q2输入所述控制信号。
在该实施例中，在第二开关组件1068中设置第二功率管Q2的基础上，进一步设置第三功率管Q3，第三功率管Q3的基极接收脉冲信号，第三功率管Q3的发射极接地，第三功率管Q3的集电极连接到第二功率管Q2的受控极，以通过集电极向受控极输送信号，控制第二功率管Q2的开闭。
参照图3，在本公开的一个实施例中，所述切换电路还包括缓启动单元108，所述缓启动单元108的输入端连接至所述第一供电模块102，所述缓启动单元108的输出端连接至所述第一输电线路1062的输入端，所述缓启动单元108用于控制所述第一供电模块102向所述第一输电线路1062输入冲击电流。
在该实施例中，切换电路在设置切换单元106的基础上，进一步设置有缓启动单元108，通过设置缓启动单元108，一方面，在第一供电模块102接入电源时，防止输入电流过大对电源切换装置中的其它器件以及需要供电的器件造成冲击，另一方面，缓启动单元108的设置，使第一供电模块102传输到供电端110的电压逐渐升高，在升高到大于第二供电模块104的电压时，使第一二极管D1截止，从而实现第二供电模块104到第一供电模块102的平稳切换，并且通过调节功率管的电压参数，使第二供电模块104与第一供电模块102之间的切换具有更灵活的调节性。
参照图4与图5，在本公开的一个实施例中，所述缓启动单元108包括：第四功率管Q4，所述第四功率管Q4的第一极连接至所述第一供电模块102，所述第四功率管Q4的第二极能够连接至所述第一输电线路1062的输入端，参照图6，所述第四功率管Q4的受控极通过第一电阻 R1连接至所述第一供电模块102。
在该实施例中，参照图6，采用第四功率管Q4作为缓启动的具体实现器件，第四功率管Q4的受控极通过第一电阻R1连接至所述第一供电模块102，防止第一供电模块102接入电源时产生电流冲击。
参照图4与图5，在本公开的一个实施例中，所述缓启动单元108还包括：并联的第二二极管D2与第五功率管Q5，所述第二二极管D2的阳极连接至所述第四功率管Q4的第二极，所述第二二极管D2的阴极连接至所述切换单元106的第一输入端，参照图6，所述第五功率管Q5的受控极通过第二电阻R2连接至所述第四功率管Q4的受控极。
在该实施例中，缓启动单元108在设置有第四功率管Q4的基础上，进一步设置并联的第五功率管Q5与第二二极管D2，第二二极管D2的阳极连接至第四功率管Q4，第二二极管D2的阴极连接至供电端110，通过设置第二二极管D2，防止第二供电模块104向第一供电模块102产生倒灌。
通过设置第五功率管Q5，能够进一步提升平缓切换的性能。
在本公开的一个实施例中，所述缓启动单元108还包括：比较器Q，所述比较器Q的第一输入端连接至所述第一供电模块102，所述比较器Q的第二输入端连接至所述第二供电模块104，所述比较器Q的输出端连接至所述第五功率管Q5的受控极，以在所述第一供电模块102的电压大于所述第二供电模块104的电压的情况下，使所述第五功率管Q5导通，在所述第一供电模块102的电压下降至下雨所述第二供电模块104的电压的情况下，使所述第五功率管Q5断开。
在该实施例中，缓启动单元108进一步还包括比较器Q，比较器Q的第一输入端连接到第一供电模块102，以由第一供电模块102向比较器Q输入第一电压，比较器Q的第二段连接到第二供电模块104，以由第二供电模块104向比较器Q输入第二电压，在第一电压大于第二电压的情况下，表明第一供电模块102接入电源，并能够输出稳定的供电信号，在这种情况下，通过比较器Q的输出信号控制第五功率管Q5导通，结合第一供电模块102控制第四功率管Q4导通，以及第二功率管Q2被配置 为导通状态，将第二供电模块104切换至第一供电模块102供电。
参照图4，在本公开的一个实施例中，所述第二供电模块104还包括电池芯片112，所述电池芯片112的第一端连接至所述电池模块，所述电池芯片112的第二端连接至所述第一供电模块102，所述电池芯片112的第三端连接至所述第二输电线路104的输入端。
具体地，在第一供电模块102为USB端口，第二供电模块104为电池模块的情况下，在USB端口接入外接电源的情况下，通过切换单元106实现供电模块即电源的切换。
USB端口未连接电源，由电池经电池芯片112后给供电端110供电，第一功率管Q1开启状态，第四功率管Q4/第五功率管Q5/第二功率管Q2处于关闭状态，防止电池倒灌给USB端口。
USB端口连接时，USB端口先关闭第一功率管Q1，防止USB端口倒灌给电池，电池由和第一功率管Q1并联的二极管给供电端110供电，第四功率管Q4缓启动工作，同时USB端口高于电池时比较器Q打开第五功率管Q5，供电端110电压由电池电压切换到USB端口电压。
USB端口断连时，USB端口电压会下跌，跌落到电池左右时比较器Q控制第五功率管Q5关闭，供电端110由电池电压经和第一功率管Q1并联的二极管提供，USB端口继续跌落后第一功率管Q1导通,供电端110电压由USB端口电压切换到电池电压。
用自带电池供电时，***外接电源，供电自动快速切到外接电源上；拔掉外接电源，供电自动快速切至电池供电，无需通过充电芯片的升降压，去掉电源转换消耗的功率。
参照图5具体地，在第一供电模块102为USB端口供电端，第二供电模块104为VCC端口的情况下，USB端口未连接电源，VCC端口经第一功率管Q1给端口110供电，第一功率管Q1开启状态，第四功率管Q4/第五功率管Q5/第二功率管Q2处于关闭状态，防止BAT倒灌给USB端口。
USB端口连接时，USB端口先关闭第一功率管Q1，防止USB端口倒灌给VCC端口，VCC端口由和第一功率管Q1并联的二极管给供电端 110供电，第四功率管Q4缓启动工作，同时USB端口高于一定电压时比较器Q打开第五功率管Q5，供电端110电压由VCC端口电压切换到USB端口电压。
USB端口断连时，USB端口电压会下跌，跌落到一定电压左右时比较器Q控制第五功率管Q5关闭，供电端110由VCC端口电压经和第一功率管Q1并联的二极管提供，USB端口继续跌落后第一功率管Q1导通,供电端110电压由USB端口电压切换到VCC端口电压。
USB端口先***时，不过VCC端口是否***都是从USB端口供电。
根据本公开的一种云台实施例，包括：上述实施例的所述的电源切换装置。
参照图7，在本公开的一个实施例中，所述第一电路板20为云台的主控板，设置有控制器202，FPC连接器204、第一连接器206与第二连接器208，所述第一连接器206用于与上述实施例描述的电源切换装置10中的供电端连接，第二连接器208用于与显示屏50连接。
第二电路板30为电调板，用于驱动电机40运行，第二电路板30上设置有用于与第一电路板电连接的FPC连接器304，驱动芯片302与霍尔芯片306，驱动芯片302与电机40连接。
尽管已描述了本公开实施例的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例做出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本公开实施例范围的所有变更和修改。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者终端设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者终 端设备中还存在另外的相同要素。
在本公开中，术语“第一”、“第二”、“第三”仅用于描述的目的，而不能理解为指示或暗示相对重要性；术语“多个”则指两个或两个以上，除非另有明确的限定。术语“安装”、“相连”、“连接”、“固定”等术语均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；“相连”可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。
本公开的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“前”、“后”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或单元必须具有特定的方向、以特定的方位构造和操作，因此，不能理解为对本公开的限制。
在本说明书的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
最后应说明的是：以上实施例仅用以说明本公开的技术方案，而非对其限制；尽管参照前述实施例对本公开进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围。

Claims (15)

  1. 一种电源切换装置，其特征在于，包括：第一供电模块、第二供电模块与切换电路，所述切换电路包括切换单元，其中，
    所述切换单元包括第一输电线路、第二输电线路以及设置在所述第二输电线路上的第一开关组件，所述第一输电线路与所述第二输电线路的输出端均与供电端连接，所述供电端用于向外供电；
    所述第一输电线路的输入端与所述第一开关组件的受控端分别与所述第一供电模块电连接，所述受控端用于控制所述第一开关组件的导通和/或断开，所述第二输电线路的输入端与所述第二供电模块电连接；
    在所述第一供电模块未连接电源的情况下，所述第一开关组件导通，由所述第二供电模块通过所述供电端供电，在所述第一供电模块连接电源的情况下，所述第一开关组件被断开，并由所述第一供电模块通过所述供电端供电。
  2. 根据权利要求1所述的电源切换装置，其特征在于，所述第一开关组件包括并联的第一功率管与第一二极管，所述第一二极管的阴极连接至所述第一输电线路的输出端，所述第一二极管的阳极为所述第二输电线路的输入端，所述第一功率管的受控极为所述受控端，并与所述第一供电模块电连接，在所述第一供电模块连接电源的情况下，所述第一供电模块控制所述第一功率管断开；
    在所述第一输电线路的输出端的电压大于所述第二输电线路的输入端的情况下，所述第一开关管截止，所述供电端由所述第一供电模块供电。
  3. 根据权利要求1所述的电源切换装置，其特征在于，所述切换单元还包括：
    第二开关组件，设置在第一输电线路上，在所述第一供电模块未连接电源的情况下，所述第二开关组件被配置为断开状态，在所述第一供电模块连接电源的情况下，所述第二开关组件被配置为导通状态。
  4. 根据权利要求3所述的电源切换装置，其特征在于，所述第二开关组件包括：
    第二功率管，所述第二功率管的第一极用于连接至所述第一供电模块，所述第二功率管的第二极用于连接至所述供电端，所述第二功率管的受控极用于接收控制信号，在所述第一供电模块未连接电源的情况下，所述控制信号用于控制所述第二功率管断开，在所述第一供电模块连接电源的情况下，所述控制信号用于控制所述第二功率管导通。
  5. 根据权利要求4所述的电源切换装置，其特征在于，所述第二开关组件还包括：
    第三功率管，所述第三功率管的第一极用于接地，所述第三功率管的第二极用于连接至所述第二功率管的受控极，所述第三功率管的受控极用于接收脉冲信号，所述第三功率管的第二极用于根据所述脉冲信号向所述第二功率管输入所述控制信号。
  6. 根据权利要求1至5中任一项所述的电源切换装置，其特征在于，所述切换电路还包括缓启动单元，所述缓启动单元的输入端连接至所述第一供电模块，所述缓启动单元的输出端连接至所述第一输电线路的输入端，所述缓启动单元用于控制所述第一供电模块向所述第一输电线路输入冲击电流。
  7. 根据权利要求6所述的电源切换装置，其特征在于，所述缓启动单元包括：
    第四功率管，所述第四功率管的第一极连接至所述第一供电模块，所述第四功率管的第二极能够连接至所述第一输电线路的输入端，所述第四功率管的受控极通过第一电阻连接至所述第一供电模块。
  8. 根据权利要求7所述的电源切换装置，其特征在于，所述缓启动单元还包括：
    并联的第二二极管与第五功率管，所述第二二极管的阳极连接至所述第四功率管的第二极，所述第二二极管的阴极连接至所述第一输电线路的输入端，所述第五功率管的受控极通过第二电阻连接至所述第四功率管的受控极。
  9. 根据权利要求8所述的电源切换装置，其特征在于，所述缓启动单元还包括：
    比较器，所述比较器的第一输入端连接至所述第一供电模块，所述比较器的第二输入端连接至所述第二供电模块，所述比较器的输出端连接至所述第五功率管的受控极，以在所述第一供电模块的电压大于所述第二供电模块的电压的情况下，使所述第五功率管导通，在所述第一供电模块的电压下降至下雨所述第二供电模块的电压的情况下，使所述第五功率管断开。
  10. 根据权利要求1至5中任一项所述的电源切换装置，其特征在于，
    所述第一供电模块与所述第二供电模块均为直流供电模块。
  11. 根据权利要求10所述的电源切换装置，其特征在于，
    所述第一供电模块包括USB端口。
  12. 根据权利要求10所述的电源切换装置，其特征在于，
    所述第二供电模块包括VCC端口。
  13. 根据权利要求10所述的电源切换装置，其特征在于，
    所述第二供电模块包括电池模块。
  14. 根据权利要求13所述的电源切换装置，其特征在于，所述第二供电模块还包括电池芯片，
    所述电池芯片的第一端连接至所述电池模块，所述电池芯片的第二端连接至所述第一供电模块，所述电池芯片的第三端连接至所述第二输电线路的输入端。
  15. 一种云台，其特征在于，包括：
    如权利要求1至14中任一项所述的电源切换装置。
PCT/CN2020/135419 2020-09-30 2020-12-10 电源切换装置和云台 WO2022068061A1 (zh)

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