CN116742840A - Circuit protection method, device, related equipment and medium - Google Patents
Circuit protection method, device, related equipment and medium Download PDFInfo
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- CN116742840A CN116742840A CN202210214957.0A CN202210214957A CN116742840A CN 116742840 A CN116742840 A CN 116742840A CN 202210214957 A CN202210214957 A CN 202210214957A CN 116742840 A CN116742840 A CN 116742840A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Static Devices (AREA)
Abstract
The application discloses a circuit protection method, a device, related equipment and a medium, which are applied to a wireless receiving circuit in a wireless power supply system, wherein the method comprises the following steps: when the load equipment in the wireless receiving circuit is monitored to be turned off, the output voltage of the wireless receiving circuit is obtained; and controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage so as to protect the wireless receiving circuit. The application can solve the technical problems of circuit complexity, circuit cost increase and the like in the prior art.
Description
Technical Field
The application belongs to the field of wireless power transmission, and particularly relates to a circuit protection method, a circuit protection device, related equipment and a medium.
Background
Currently, existing wireless power supply systems are generally composed of two parts: a wireless transmit circuit and a wireless receive circuit, and the wireless transmit circuit and the wireless receive circuit transfer energy through a magnetic field. The wireless receiving circuit generally adopts a detuned control mode to adjust the energy received by the circuit, and particularly can play a role in protecting the circuit by changing the resonant capacitance value in the wireless receiving circuit or the inductance of a receiving coil and the like so as to avoid damaging various components in the circuit.
However, in practice, it is found that a detuned control manner needs to add a plurality of capacitors, a plurality of switches, or a plurality of coils in the wireless receiving circuit, which increases the complexity of the circuit and the cost of the circuit.
Disclosure of Invention
The application provides a circuit protection method, a circuit protection device, related equipment and a medium, which can solve the technical problems of circuit complexity, circuit cost increase and the like in the prior art.
In a first aspect, an embodiment of the present application provides a circuit protection method, which is applied to a wireless receiving circuit in a wireless power supply system, where the method includes:
when the load equipment in the wireless receiving circuit is monitored to be turned off, the output voltage of the wireless receiving circuit is obtained;
and controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage so as to protect the wireless receiving circuit.
In some embodiments, the controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage includes:
and when the output voltage reaches a preset high-voltage early warning value, starting a target power tube in the wireless receiving circuit so as to discharge the energy received by the wireless receiving circuit.
In some embodiments, the controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage includes:
and when the output voltage reaches a preset low-voltage early warning value, closing a target power tube in the wireless receiving circuit so as to stop discharging the energy received by the wireless receiving circuit.
In some embodiments, before the controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage, the method further includes:
transmitting a notification message to a wireless transmitting circuit, wherein the notification message is used for notifying to reduce the transmitting power of the wireless transmitting circuit;
and controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage comprises the following steps:
and if the feedback message sent by the wireless transmitting circuit is not received within the preset time, controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage.
In some embodiments, the wireless receiving circuit at least includes a first power tube and a second power tube, and controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage includes:
and controlling the on-off of the first power tube and the second power tube according to the output voltage.
In some embodiments, the wireless receiving circuit at least includes a first power tube and a second power tube, and controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage includes:
when the detection voltage of the first power tube is larger than that of the second power tube, controlling the on-off of the first power tube according to the output voltage; or alternatively, the process may be performed,
when the detection voltage of the first power tube is smaller than or equal to the detection voltage of the second power tube, controlling the on-off of the second power tube according to the output voltage;
the detection voltage is a voltage between the drain electrode and the source electrode of the corresponding power tube.
In a second aspect, an embodiment of the present application provides a circuit protection device, which is applied to a wireless receiving circuit, where the device includes an acquisition module and a control module, where:
the acquisition module is used for acquiring the output voltage of the wireless receiving circuit when the load equipment in the wireless receiving circuit is monitored to be turned off;
and the control module is used for controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage so as to protect the wireless receiving circuit.
The details not described or not described in the embodiments of the present application may correspond to the relevant descriptions in the method embodiments described in the foregoing first aspect, and are not repeated herein.
In a third aspect, an embodiment of the present application provides another circuit protection device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method as provided in the first aspect above when the computer program is executed.
In a fourth aspect, an embodiment of the present application provides an electrical home appliance, the circuit protection device including a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method as provided in the first aspect above when executing the computer program.
In a fifth aspect, an embodiment of the present application provides an air conditioner, the circuit protection device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method provided in the first aspect above when the computer program is executed.
In a sixth aspect, an embodiment of the present application provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the steps of the method as provided in the first aspect above.
In one or more technical schemes provided by the embodiment of the application, when the load equipment in the wireless receiving circuit is monitored to be turned off, the output voltage of the wireless receiving circuit is obtained; and controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage so as to protect the wireless receiving circuit. In the scheme, when the load equipment in the wireless receiving circuit is turned off, the target power tube in the wireless receiving circuit can be controlled to be on-off by the output voltage of the wireless receiving circuit so as to achieve the purpose of protecting the wireless receiving circuit, so that the wireless receiving circuit can be quickly and conveniently protected on the premise of not changing the wireless receiving circuit, namely on the premise of not increasing the complexity of the circuit and the cost of the circuit, and convenience and high efficiency of circuit protection are facilitated. Meanwhile, the technical problems of circuit complexity increase, circuit cost increase and the like caused by adopting a detuned control mode in the prior art are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1-4 are schematic structural diagrams of several wireless power supply systems according to embodiments of the present application.
Fig. 5 is a schematic flow chart of a circuit protection method according to an embodiment of the present application.
Fig. 6 is a schematic waveform diagram of power signals of devices in a wireless receiving circuit under overvoltage protection of the circuit according to an embodiment of the present application.
Fig. 7 is a schematic waveform diagram of power signals of devices in a wireless receiving circuit when overvoltage protection of the circuit fails.
Fig. 8 and fig. 9 are schematic structural diagrams of two circuit protection devices according to an embodiment of the present application.
Detailed Description
In view of the technical problems of circuit complexity, circuit cost increase and the like existing in the existing circuit protection scheme by adopting a detuned control mode. The application provides a circuit protection method, a device, related equipment and a medium, wherein when a wireless receiving circuit monitors that a load device is turned off, the wireless receiving circuit controls the on-off of a target power tube according to the acquired output voltage of the wireless receiving circuit, so that the wireless receiving circuit is conveniently protected, and the technical problems of circuit complexity increase, circuit cost increase and the like caused by adopting a detuned control mode in the prior art are avoided.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented 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, system, article, or apparatus 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 apparatus.
The circuit protection method, apparatus, system, related device and medium provided in the embodiments of the present specification will be described in detail below with reference to the accompanying drawings and with reference to specific embodiments.
Fig. 1 is a schematic structural diagram of a wireless power supply system according to an embodiment of the present application. The wireless power supply system shown in fig. 1 includes a wireless transmitting circuit 10 and a wireless receiving circuit 20. The wireless transmitting circuit 10 may also be referred to as a transmitting end or a wireless transmitting device, and the wireless receiving circuit 20 may also be referred to as a receiving end or a wireless receiving device, which is not limited by the present application. Wherein:
the wireless transmitting circuit 10 includes an inverter circuit 101, a first compensation network 102 and a transmitting coil LT that are electrically connected. In practical applications, the wireless transmitting circuit 10 may further include other custom circuits or devices, such as a controller or a filter circuit. As shown in fig. 1, the wireless transmitting circuit 10 includes an inverter circuit 101, a first compensation network 102, and a transmitting coil LT according to the present application, but is not limited thereto. The inverter circuit 101, the first compensation network 102 and the transmitting coil LT are electrically connected in sequence, and an input end of the inverter circuit 101 is electrically connected with an external power source +pbus.
The wireless receiving circuit 20 includes a rectifying circuit 201, a second compensating network 202 and a receiving coil Lr electrically connected to each other. Optionally, the wireless receiving circuit 20 may further include a circuit such as a filter circuit 203 and a load device 204 (R L ) And the application is not limited by the custom circuits or devices, etc. As shown in fig. 1, the wireless receiving circuit 20 includes a rectifying circuit 201, a second compensating network 202, a receiving coil Lr, a filtering circuit 203, and a load device 204, which are taken as an example, but the application is not limited thereto. The installation position of the filter circuit 203 is not limited in the present application. For example, in the present application, the receiving coil Lr, the second compensation network 202, the rectifying circuit 201, the filtering circuit 203, and the load device 204 may be electrically connected in sequence. The voltage across the load device 204 may also be referred to as a bus voltage V0 on the wireless receiving circuit 20 side.
The inverter circuit according to the present application is used for converting an externally input dc signal into a corresponding ac signal, and the specific embodiment of the inverter circuit is not limited, and may include, but is not limited to, a full-bridge inverter circuit, a half-bridge inverter circuit, or other circuits supporting signal inversion. The present application relates to a rectifying circuit for converting an input ac signal into a corresponding dc signal, and the specific embodiment of the rectifying circuit is not limited to the present application, and may include, for example, but not limited to, a full-bridge rectifying circuit, a half-bridge rectifying circuit, or other circuits supporting signal rectification. The compensation network is used for performing power compensation on the input electric energy signal, such as reactive power compensation and the like, and the application is not limited with respect to the specific implementation circuit mode of the compensation circuit. The compensation circuit and the transmitting coil LT or the receiving coil Lr which are electrically connected with the compensation circuit form a corresponding resonant circuit which is used for transmitting corresponding electric energy signals and the like in a wireless power supply system. The filtering circuit is used for filtering an input electric energy signal (such as an alternating current signal or a direct current signal), for example, filtering out a signal with a frequency exceeding or falling below a corresponding preset frequency threshold value. The specific embodiment of the filter circuit is not limited by the present application, and may include, but not limited to, a filter capacitor, etc.
In practical applications, the wireless transmitting circuit 10 processes the electric energy signal input by the external power source (+pbus) sequentially through the inverter circuit 101 and the first compensation network 102, and finally wirelessly transmits the electric energy signal of the external power source to the wireless receiving circuit 20 through the transmitting coil LT. Correspondingly, the wireless receiving circuit 20 receives the electric energy signal wirelessly transmitted by the transmitting coil LT through the receiving coil Lr, and further sequentially processes the electric energy signal through the second compensating network 202 and the rectifying circuit 201 to supply power to the load device 204, so that the load device can start to operate.
Fig. 2-4 are schematic structural diagrams of several possible wireless power supply systems according to embodiments of the present application. The wireless power supply system shown in each of fig. 2 to 4 includes a wireless transmitting circuit 10 and a wireless receiving circuit 20. On the wireless transmitting circuit 10 side, the inverter circuit 101 is illustrated as including a full-bridge inverter circuit including 4 inverter power transistors, and the first compensation network 102 includes a first capacitor CT, but the present application is not limited thereto. As shown in the drawing, the inverter circuit 101 includes a first inverter power transistor Q1, a second inverter power transistor Q2, a third inverter power transistor Q3, and a fourth inverter power transistor Q4. The inverter power transistors Q1, Q2, Q3, Q4 may be any one of an IGBT (Insulated Gate Bipolar Transistor ), a MOS transistor, a triode, a rectifier diode, and other rectifier devices, and only 4 inverter power transistors are shown as MOS transistors, but the inverter power transistors are not limited thereto. The two dc input terminals of the inverter circuit 101 may be electrically connected to an external power source +pbus.
In some embodiments, as shown in fig. 2-4, the rectifying circuit 201 in the wireless receiving circuit 20 includes a full-bridge rectifying circuit composed of 4 rectifying power tubes, the second compensating network 202 includes a second capacitor Cr, and the filtering circuit 203 includes a filtering capacitor C1, which is illustrated, but not limited thereto. The rectifying circuit 201 includes a first rectifying power tube, a second rectifying power tube, a third rectifying power tube, and a fourth rectifying power tube. The first rectifying power tube, the second rectifying power tube, the third rectifying power tube and the fourth rectifying power tube may be any one of an IGBT (Insulated Gate Bipolar Transistor ), a MOS tube, a triode, a rectifying diode or other rectifying devices.
In the rectifying circuit 201 shown in fig. 2, the rectifying circuit 201 includes a first rectifying diode D1, a second rectifying diode D2, a first rectifying MOS transistor Q5, and a second rectifying MOS transistor Q6 as an example. The rectifying diodes D1 and D2 are opposite to the rectifying MOS transistors Q5 and Q6, and the rectifying diodes D1 and D2 are mounted at the upper ends of the rectifying MOS transistors Q5 and Q6, that is, at the upper half-bridge portion. For example, in the illustration, the rectifying diode D1 and the rectifying MOS Q5 are used as a leading arm, and the rectifying diode D2 and the rectifying MOS Q6 are used as a trailing arm, and are installed in a full-bridge rectifying circuit formed by the rectifying diodes D1 and D2 and the rectifying MOS Q5 and Q6 together, so as to be used as the rectifying circuit 201.
Accordingly, in the rectifying circuit 201 shown in fig. 3, the rectifying circuit 201 includes a first rectifying diode D1, a second rectifying diode D2, a first rectifying MOS transistor Q5, and a second rectifying MOS transistor Q6 as an example. The rectifying diodes D1 and D2 are opposite to the rectifying MOS transistors Q5 and Q6, and the rectifying MOS transistors Q5 and Q6 are mounted at the upper ends of the rectifying diodes D1 and D2, that is, at the upper half-bridge portion. For example, in the illustration, the rectifying MOS transistor Q5 and the rectifying diode D1 are used as a leading arm, and the rectifying MOS transistor Q6 and the rectifying diode D2 are used as a trailing arm, and are installed in a full-bridge rectifying circuit formed by the rectifying diodes D1 and D2 and the rectifying MOS transistors Q5 and Q6 together, so as to be used as the rectifying circuit 201.
Accordingly, in the rectifying circuit 201 shown in fig. 4, the rectifying circuit 201 includes a first rectifying MOS transistor Q5, a second rectifying MOS transistor Q6, a third rectifying MOS transistor Q7, and a fourth rectifying MOS transistor Q8 as an example. The full-bridge rectifying circuit formed by the rectifying MOS transistors Q5, Q6, Q7 and Q8 is used as the rectifying circuit 201.
In the wireless receiving circuit 20 shown in fig. 2-4, the specific circuit implementation of the filter circuit 203 and the installation position thereof are not limited, and the filter circuit 203 is illustrated as including a filter capacitor C1, and the filter capacitor C1 is illustrated as being connected in parallel with both ends of the load device 204, but is not limited thereto.
Fig. 5 is a schematic flow chart of a circuit protection method according to the embodiment of the present application, based on the wireless power supply system provided by the embodiments of fig. 1 to 4. The method shown in fig. 5 is applied to the wireless receiving circuit 20 provided in the foregoing embodiment, and includes the following implementation steps:
s501, when it is detected that the load device 204 in the wireless receiving circuit 20 is turned off, the output voltage of the wireless receiving circuit 20 is obtained.
The present application can periodically or in real time monitor whether the load device 204 in the wireless receiving circuit 20 is turned off/off. The output voltage of the wireless receiving circuit 20 can be obtained in real time or periodically when the present application monitors that the load device 204 in the wireless receiving circuit 20 is turned off.
S502, controlling the on-off of a target power tube in the wireless receiving circuit 20 according to the output voltage to protect the wireless receiving circuit 20.
Before step S502, after the load device 204 in the wireless receiving circuit 20 is turned off, the present application may send a notification message to the wireless transmitting circuit 10, where the notification message is used to notify that the load device 204 is turned off, and the wireless transmitting circuit 10 needs to reduce the transmission power of its own circuit. Accordingly, when the wireless receiving circuit 20 and the wireless transmitting circuit 10 cannot communicate or cannot communicate, the step S502 may be continuously executed to control the on-off of the corresponding target power tube in the wireless receiving circuit 20 according to the obtained output voltage V0 of the wireless receiving circuit 20, so as to achieve the purpose of protecting the wireless receiving circuit 20. In the specific embodiment, the wireless receiving circuit 20 does not detect that the feedback message sent by the wireless transmitting circuit 10 is received within a preset time period, and then determines that the wireless receiving circuit 20 and the wireless transmitting circuit 10 cannot communicate with each other in time or not.
It can be appreciated that when the wireless receiving circuit 20 is abnormally stopped from the no-load device 204 (i.e. the load device 204 is turned off), if the wireless transmitting circuit 10 is abnormally unable to communicate and the wireless transmitting circuit 10 continuously transmits energy to the outside, the wireless receiving circuit 20 side cannot consume the received energy, which may cause the overvoltage damage of the wireless receiving circuit 20. Specifically, according to the circuit characteristics, the output voltage V0 of the wireless receiving circuit 20 is specifically shown in the following formula (1):
where Vin is the input voltage of the inverter circuit 101 in the wireless transmitting circuit 10, i.e., + Pbus in fig. 2. R is R L For the resistance value of the load device 204, f isThe operating frequency M of the inverter circuit 101 is a mutual inductance coefficient between the transmitting coil LT and the receiving coil Lr.
As can be seen from the above formula (1), when the wireless receiving circuit 20 has no load device 204, and the wireless transmitting circuit is abnormal and cannot communicate, and the wireless receiving circuit 20 cannot consume the received energy because of continuous high power (for example, the transmitting power is greater than the preset power), the output voltage V0 of the wireless receiving circuit 20 increases as the load device 204 is disconnected (the resistance value becomes infinite), which eventually leads to the overvoltage damage of the wireless receiving circuit 20. At this time, the present application needs to control the on-off of the target power tube in the wireless receiving circuit 20, so as to drain the energy received by the wireless receiving circuit 20 through the resonant circuit composed of the receiving coil Lr and the capacitor Cr, and avoid the energy received from being transmitted to the post-stage circuit of the resonant circuit, thereby avoiding the problem of circuit damage caused by the overvoltage condition of the post-stage circuit.
Several possible embodiments exist for step S502 are described below.
In a specific embodiment, after the output voltage of the wireless receiving circuit 20 is obtained, the present application can determine whether the output voltage reaches a preset high voltage/overvoltage early warning value. When the output voltage reaches a preset high-voltage early warning value, it can be determined that the output voltage of the wireless receiving circuit 20 is over-voltage, and the wireless receiving circuit 20 needs to be over-voltage protected. Specifically, the present application can turn on the target power tube in the wireless receiving circuit 20 to discharge the energy received by the wireless receiving circuit 20, so as to avoid the problem of circuit damage caused by overvoltage condition of the wireless receiving circuit 20. The high-voltage early warning value is an overvoltage threshold value set by a system in a self-defining mode, and the method is not limited. The target power tube is a power tube supporting energy discharge in the wireless receiving circuit, such as an IGBT (Insulated Gate Bipolar Transistor ), a MOS tube, a triode or other power tubes supporting energy discharge. The number of the target power transistors is not limited, and may be one or more, and specifically may be any one or more of the rectifying power transistors Q5, Q6, Q7 and Q8 correspondingly included in the embodiments shown in fig. 2 to fig. 4, for example.
For example, please refer to fig. 6 and fig. 7, which are schematic diagrams of waveforms of power signals of devices in a wireless receiving circuit with or without circuit overvoltage protection. Curve 1 in the figure represents the current signal of the load device 204 in the wireless receiving circuit 20. Curve 2 represents the current signal through the target power transistor Q5 in the radio receiving circuit 20. Curve 3 shows a voltage signal corresponding to the output voltage of the wireless receiving circuit 20.
Fig. 6 specifically shows a waveform schematic diagram of a power signal of each device in the wireless receiving circuit under the overvoltage protection of the circuit. As can be seen from fig. 6, the load device 204 in the wireless receiving circuit 20 is turned off at the moment of 1ms, and the load current thereof becomes 0, and at this time, the output voltage V0 of the wireless receiving circuit 20 is effectively controlled due to the intervention of the circuit protection measures described in the embodiment of the present application, and no overvoltage condition occurs.
And fig. 7 shows a schematic waveform of the power signal of each device in the wireless receiving circuit without the circuit overvoltage protection (or the circuit overvoltage protection fails). As shown in fig. 7, the output voltage V0 of the wireless receiving circuit 20 is continuously increased from 100V (volts) to 600V due to lack of circuit protection or circuit protection failure at the time of 1ms, which is liable to cause circuit overvoltage damage.
In an alternative embodiment, in order to accelerate the reduction/decrease of the energy received by the wireless receiving circuit 20 after the target power tube is turned on, the present application may still continue to send a notification message to the wireless transmitting circuit 10, where the notification message is used to notify the load device 204 that it is turned off, and the wireless transmitting circuit 10 needs to reduce the transmission power of its own circuit. Accordingly, when communication between the wireless receiving circuit 20 and the wireless transmitting circuit 10 is not possible or not in time, for example, when a feedback message transmitted by the wireless transmitting circuit 10 is not received within a preset period of time, the output voltage V0 of the wireless receiving circuit 20 at this time may be obtained.
The application can further judge whether the output voltage reaches a preset low-voltage early warning value. When the output voltage reaches a preset low-voltage early warning value, it can be determined that the output voltage of the wireless receiving circuit 20 is too low, and the wireless receiving circuit 20 needs to be low-voltage protected. Specifically, for example, the present application may close the turned-on target power tube in the wireless receiving circuit 20, so as to stop the energy received by the wireless receiving circuit 20 from being discharged through the target power tube, thereby avoiding the problem that the corresponding devices in the circuit are damaged due to low voltage of the wireless receiving circuit 20.
In an alternative embodiment, the present application may end the implementation procedure of the present application after the wireless receiving circuit 20 successfully communicates with the wireless transmitting circuit 10 and successfully reduces the transmitting power of the wireless transmitting circuit 10. Otherwise, the process of steps S501-502 of the present application is repeated until the wireless receiving circuit 20 and the wireless transmitting circuit 10 successfully communicate, and the transmitting power of the wireless transmitting circuit 10 is successfully reduced, and the process can be ended.
In another embodiment, the wireless receiving circuit 20 includes at least a first power tube and a second power tube. The application can control the on-off of the first power tube and the second power tube according to the output voltage, thereby achieving the purpose of protecting the wireless receiving circuit 20. In other words, the target power tube includes both the first power tube and the second power tube. The foregoing description of how to control the on-off of the first power tube and the second power tube may be correspondingly referred to, and will not be repeated herein. The first power tube and the second power tube are both energy supporting energy release in the wireless receiving circuit 20, for example, the first power tube and the second power tube may be specifically rectifying power tubes Q5 and Q6 in the embodiments shown in fig. 2-4. The relevant descriptions of the first power tube and the second power tube may be referred to the previous descriptions of the target power tube correspondingly, and the disclosure is not repeated here.
In another embodiment, the wireless receiving circuit 20 includes at least a first power tube and a second power tube. The application can selectively control the on-off of any one of the power tubes by judging the detection voltages corresponding to the first power tube and the second power tube, thereby achieving the purpose of protecting the wireless receiving circuit 20. The detection voltage is a voltage between the drain and the source of a corresponding power tube (specifically, the first power tube or the second power tube), namely, a voltage at two ends DS.
In a specific implementation, when the detected voltage of the first power tube is greater than the detected voltage of the second power tube, the application can control the on-off of the first power tube according to the output voltage so as to achieve the purpose of protecting the wireless receiving circuit 20. In other words, when the detection voltage of the first power tube is greater than the detection voltage of the second power tube, the target power tube is the first power tube. For how to control the on-off of the first power tube, reference may be made correspondingly to the foregoing description related to controlling the on-off of the target power tube, which is not repeated herein.
On the contrary, when the detected voltage of the first power tube is less than or equal to the detected voltage of the second power tube, the application can control the on-off of the second power tube according to the output voltage so as to achieve the purpose of protecting the wireless receiving circuit 20. In other words, when the detection voltage of the first power tube is less than or equal to the detection voltage of the second power tube, the target power tube is the second power tube. For how to control the on-off of the second power tube, reference may be made correspondingly to the foregoing description related to controlling the on-off of the target power tube, which is not repeated herein.
By implementing the embodiment of the application, when the load equipment in the wireless receiving circuit is monitored to be turned off, the output voltage of the wireless receiving circuit is obtained; and controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage so as to protect the wireless receiving circuit. In the scheme, when the load equipment in the wireless receiving circuit is turned off, the target power tube in the wireless receiving circuit can be controlled to be on-off by the output voltage of the wireless receiving circuit so as to achieve the purpose of protecting the wireless receiving circuit, so that the wireless receiving circuit can be quickly and conveniently protected on the premise of not changing the wireless receiving circuit, namely on the premise of not increasing the complexity of the circuit and the cost of the circuit, and convenience and high efficiency of circuit protection are facilitated. Meanwhile, the technical problems of circuit complexity increase, circuit cost increase and the like caused by adopting a detuned control mode in the prior art are solved.
Based on the same inventive concept, the embodiments of the present disclosure provide a circuit protection device, as shown in fig. 8, including: an acquisition module 801 and a control module 802, wherein:
the obtaining module 801 is configured to obtain an output voltage of the wireless receiving circuit when it is monitored that a load device in the wireless receiving circuit is turned off;
the control module 802 is configured to control on-off of a target power tube in the wireless receiving circuit according to the output voltage, so as to protect the wireless receiving circuit.
In some embodiments, the control module 802 is specifically configured to:
and when the output voltage reaches a preset high-voltage early warning value, starting a target power tube in the wireless receiving circuit so as to discharge the energy received by the wireless receiving circuit.
In some embodiments, the control module 802 is specifically configured to:
and when the output voltage reaches a preset low-voltage early warning value, closing a target power tube in the wireless receiving circuit so as to stop discharging the energy received by the wireless receiving circuit.
In some embodiments, the apparatus further comprises a processing module 803, where before the controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage,
the processing module 803 is configured to send a notification message to a wireless transmitting circuit, where the notification message is configured to notify to reduce a transmit power of the wireless transmitting circuit;
the control module 802 is specifically configured to control on-off of a target power tube in the wireless receiving circuit according to the output voltage if the feedback message sent by the wireless transmitting circuit is not received within a preset period of time.
In some embodiments, the wireless receiving circuit includes at least a first power tube and a second power tube, and the control module 802 is specifically configured to:
and controlling the on-off of the first power tube and the second power tube according to the output voltage.
In some embodiments, the wireless receiving circuit includes at least a first power tube and a second power tube, and the control module 802 is specifically configured to:
when the detection voltage of the first power tube is larger than that of the second power tube, controlling the on-off of the first power tube according to the output voltage; or alternatively, the process may be performed,
when the detection voltage of the first power tube is smaller than or equal to the detection voltage of the second power tube, controlling the on-off of the second power tube according to the output voltage;
the detection voltage is a voltage between the drain electrode and the source electrode of the corresponding power tube.
Based on the same inventive concept, the embodiment of the application provides another circuit protection device. As shown in fig. 9, the circuit protection device comprises a memory 904, a processor 902 and a computer program stored on the memory 904 and capable of running on the processor 902, wherein the processor 902 implements the aforementioned circuit protection method when executing the computer program.
Where in FIG. 9 a bus architecture (represented by bus 900), bus 900 may include any number of interconnected buses and bridges, with bus 900 linking together various circuits, including one or more processors, represented by processor 902, and memory, represented by memory 904. Bus 900 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. The bus interface 905 provides an interface between the bus 900 and the receiver 901 and the transmitter 903. The receiver 901 and the transmitter 903 may be the same element, i.e. a transceiver, providing a unit for communicating with various other apparatus over a transmission medium. The processor 902 is responsible for managing the bus 900 and general processing, while the memory 904 may be used to store data used by the processor 902 in performing operations.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate components may or may not be physically separate, and components as control devices may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is only an example of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (11)
1. A circuit protection method for use in a wireless receiving circuit, the method comprising:
when the load equipment in the wireless receiving circuit is monitored to be turned off, the output voltage of the wireless receiving circuit is obtained;
and controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage so as to protect the wireless receiving circuit.
2. The method of claim 1, wherein controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage comprises:
and when the output voltage reaches a preset high-voltage early warning value, starting a target power tube in the wireless receiving circuit so as to discharge the energy received by the wireless receiving circuit.
3. The method of claim 1, wherein controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage comprises:
and when the output voltage reaches a preset low-voltage early warning value, closing a target power tube in the wireless receiving circuit so as to stop discharging the energy received by the wireless receiving circuit.
4. The method of claim 1, wherein before controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage, the method further comprises:
transmitting a notification message to a wireless transmitting circuit, wherein the notification message is used for notifying to reduce the transmitting power of the wireless transmitting circuit;
and controlling the on-off of the target power tube in the wireless receiving circuit according to the output voltage comprises the following steps:
and if the feedback message sent by the wireless transmitting circuit is not received within the preset time, controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage.
5. The method of any of claims 1-4, wherein the wireless receiving circuit comprises at least a first power tube and a second power tube, and wherein controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage comprises:
and controlling the on-off of the first power tube and the second power tube according to the output voltage.
6. The method of any of claims 1-4, wherein the wireless receiving circuit comprises at least a first power tube and a second power tube, and wherein controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage comprises:
when the detection voltage of the first power tube is larger than that of the second power tube, controlling the on-off of the first power tube according to the output voltage; or alternatively, the process may be performed,
when the detection voltage of the first power tube is smaller than or equal to the detection voltage of the second power tube, controlling the on-off of the second power tube according to the output voltage;
the detection voltage is a voltage between the drain electrode and the source electrode of the corresponding power tube.
7. A circuit protection device, characterized in that it is applied in a wireless receiving circuit, the device includes an acquisition module and a control module, wherein:
the acquisition module is used for acquiring the output voltage of the wireless receiving circuit when the load equipment in the wireless receiving circuit is monitored to be turned off;
and the control module is used for controlling the on-off of a target power tube in the wireless receiving circuit according to the output voltage so as to protect the wireless receiving circuit.
8. A circuit protection device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any of the preceding claims 1-6 when executing the computer program.
9. An electric household appliance comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method according to any of the preceding claims 1-6 when executing the computer program.
10. An air conditioner comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any of the preceding claims 1-6 when executing the computer program.
11. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method according to any of the preceding claims 1-6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210214957.0A CN116742840A (en) | 2022-03-04 | 2022-03-04 | Circuit protection method, device, related equipment and medium |
| PCT/CN2022/102594 WO2023165060A1 (en) | 2022-03-04 | 2022-06-30 | Circuit protection method and apparatus, and related device and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210214957.0A CN116742840A (en) | 2022-03-04 | 2022-03-04 | Circuit protection method, device, related equipment and medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116742840A true CN116742840A (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210214957.0A Pending CN116742840A (en) | 2022-03-04 | 2022-03-04 | Circuit protection method, device, related equipment and medium |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116742840A (en) |
| WO (1) | WO2023165060A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6379660B2 (en) * | 2013-06-27 | 2018-08-29 | Tdk株式会社 | Wireless power receiving apparatus and wireless power transmission apparatus |
| JP6770021B2 (en) * | 2018-05-24 | 2020-10-14 | ミネベアミツミ株式会社 | Power receiving device and wireless power transmission system |
| CN111157877B (en) * | 2019-12-31 | 2022-04-15 | 西安翔腾微电子科技有限公司 | Off-state load open circuit detection circuit |
| CN111186319A (en) * | 2020-02-21 | 2020-05-22 | 东南大学 | Vehicle-mounted end equipment protection device and method for wireless charging system of electric vehicle |
-
2022
- 2022-03-04 CN CN202210214957.0A patent/CN116742840A/en active Pending
- 2022-06-30 WO PCT/CN2022/102594 patent/WO2023165060A1/en unknown
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|---|---|
| WO2023165060A1 (en) | 2023-09-07 |
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