CN114142427A - High-power drive protection circuit and method and electronic equipment - Google Patents
High-power drive protection circuit and method and electronic equipment Download PDFInfo
- Publication number
- CN114142427A CN114142427A CN202111457741.9A CN202111457741A CN114142427A CN 114142427 A CN114142427 A CN 114142427A CN 202111457741 A CN202111457741 A CN 202111457741A CN 114142427 A CN114142427 A CN 114142427A
- Authority
- CN
- China
- Prior art keywords
- power
- signal
- unit
- module
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
Landscapes
- Electronic Switches (AREA)
Abstract
The invention discloses a high-power drive protection circuit, a method and an electronic device, wherein the circuit comprises: the power circuit comprises a control module, a multi-way switch module, at least one power circuit and at least one current acquisition module, wherein the current acquisition module comprises a Hall sensor which is used for acquiring current parameters of the power circuit and converting the current parameters into sampling signals; at least one current acquisition module is connected with the sampling end of the control module through a multi-way switch module; the control module is used for outputting gating control signals to the multi-path switch module, controlling the multi-path switch module to gate any one current acquisition module, judging whether an overcurrent fault occurs according to at least one sampling signal acquired by the current acquisition module, outputting driving signals according to a fault judgment result, and driving the power circuit to be connected or disconnected. According to the invention, the Hall sensor is used for collecting large current, overcurrent protection is realized through a plurality of sampling values, the circuit structure is simple, and the reliability of the power driving system is improved.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a high-power driving protection circuit, a high-power driving protection method and electronic equipment.
Background
With the development of the aviation industry, the requirement for the reliability of the overcurrent protection action in a high-power load system is gradually improved.
In the existing high-power driving system, current recovery is usually performed by a sampling resistor, a comparator judges whether a power loop is over-current or not according to the recovery current, and when the over-current occurs, a power MOSFET is controlled to be switched off to cut off load current. The prior art has the following problems that a sampling resistor is connected in series with a high-power load loop, the resistance value of the sampling resistor changes under the influence of environmental temperature changes, overlong service time and other factors, so that the sampling result is inaccurate, and overcurrent misjudgment can cause the power driving unit to be turned off by mistake, so that the action reliability of a high-power driving system is influenced.
Disclosure of Invention
The invention provides a high-power driving protection circuit, a high-power driving protection method and electronic equipment, which are used for realizing overcurrent detection through a Hall sensor and improving power driving reliability.
In a first aspect, an embodiment of the present invention provides a high power driving protection circuit, including: the power circuit comprises a control module, a multi-way switch module, at least one power loop and at least one current acquisition module, wherein the current acquisition modules are arranged in one-to-one correspondence with the power loops and comprise Hall sensors, and the Hall sensors are used for acquiring current parameters of the power loops and converting the current parameters into sampling signals; the at least one current acquisition module is connected with the sampling end of the control module through the multi-way switch module; the control module is used for outputting gating control signals to the multi-path switch module, controlling the multi-path switch module to gate any one current acquisition module, judging whether an overcurrent fault occurs according to at least one sampling signal acquired by the current acquisition module, outputting driving signals according to a fault judgment result, and driving the power circuit to be switched on or switched off.
Optionally, the multiway switch module comprises: the multi-selection analog switch is provided with a plurality of input ends and an output end, the input ends are connected with the current acquisition modules in a one-to-one correspondence manner, the output ends are connected with the input ends of the analog-to-digital conversion unit, and the multi-selection analog switch is used for gating any one current acquisition module according to a gating control signal and transmitting a sampling signal of the current acquisition module to the analog-to-digital conversion unit; the output end of the analog-to-digital conversion unit is connected with the control module, and the analog-to-digital conversion unit is used for performing analog-to-digital conversion processing on the sampling signal.
Optionally, the one-out-of-multiple analog switch comprises a plurality of stages of nested analog switch chips.
Optionally, the multiway switch module further comprises: the IO expansion unit comprises a buffer, a decoder and a latch, wherein the decoder is used for sending a first bus control signal to the buffer, controlling the buffer to receive a signal sent by the analog-to-digital conversion unit, sending a second bus control signal to the latch and controlling the latch to gate any current acquisition module.
Optionally, the power loop comprises: the control end of the signal and power supply isolation unit is connected with the control module, the input end of the signal and power supply isolation unit is connected with the first power supply end, the output end of the signal and power supply isolation unit is connected with the control end of the power drive unit, and the signal and power supply isolation unit is used for outputting a level signal to the power drive unit according to the drive signal; the input end of the power driving unit is connected with the second power supply end, the output end of the power driving unit is connected with the load unit, and the power driving unit performs driving control on the load unit according to the level signal.
Optionally, the power driving unit includes a power switching tube, a first filtering unit and a second filtering unit, a control end of the power switching tube is electrically connected to the signal and power isolation unit, an input end of the power switching tube is electrically connected to the second power supply end, and an output end of the power switching tube is electrically connected to the load unit; the first end of the first filtering unit is electrically connected with the control end of the power switch tube, and the second end of the first filtering unit is electrically connected with the output end of the power switch tube; the first end of the second filtering unit is electrically connected with the input end of the power switch tube, and the second end of the second filtering unit is electrically connected with the output end of the power switch tube.
Optionally, the power switch tube is an NPN type MOS tube.
Optionally, the gating control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.
In a second aspect, an embodiment of the present invention further provides a high-power driving protection method, which is implemented based on the above high-power driving protection circuit, and the method includes:
outputting a gating control signal to a multi-path switch module to control the multi-path switch module to gate any current acquisition module;
judging whether an overcurrent fault occurs according to at least one sampling signal acquired by the current acquisition module;
and outputting a driving signal according to the fault judgment result, and driving the power loop to be switched on or switched off.
Optionally, judging whether an overcurrent fault occurs according to at least one sampling signal acquired by the current acquisition module includes:
determining a sample deviation sequence of each sampling signal according to the at least one sampling signal and a preset current threshold;
determining a target sampling signal according to the sample deviation sequence;
and judging whether an overcurrent fault occurs according to the target sampling signal and the preset current threshold.
In a third aspect, an embodiment of the present invention further provides an electronic device, including the above high-power driving protection circuit.
The embodiment of the invention provides a high-power drive protection circuit, a method and electronic equipment, wherein the drive protection circuit is provided with a control module, a multi-way switch module, at least one power loop and at least one Hall sensor, the Hall sensor is used for collecting large current corresponding to the power loop, the control module gates and receives sampling signals of any Hall sensor, whether overcurrent fault occurs is judged according to at least one sampling signal, the drive signal is output according to the fault judgment result, the power loop is driven to be switched on or switched off, and overcurrent judgment is carried out through a plurality of sampling signals.
Drawings
Fig. 1 is a schematic structural diagram of a high-power driving protection circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a high-power driving protection circuit according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a high-power driving protection circuit according to a third embodiment of the present invention;
fig. 4 is a flowchart of a high-power driving protection method according to a fourth embodiment of the present invention;
fig. 5 is a flowchart of another high-power driving protection method according to the fourth embodiment of the present invention
Fig. 6 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of a high-power driving protection circuit according to an embodiment of the present invention, which is applicable to an application scenario in which a hall sensor performs overcurrent sampling on multiple paths of high-power load circuits. Wherein, the current of the high-power load loop can be a large current exceeding 50A.
As shown in fig. 1, the high power driving protection circuit 00 includes: the power circuit comprises a control module 110, a multi-way switch module 120, at least one power loop 130 and at least one current acquisition module 140, wherein the current acquisition modules 140 are arranged in a one-to-one correspondence manner with the power loop 130, and each current acquisition module 140 comprises a hall sensor which is used for acquiring current parameters of the power loop 130 and converting the current parameters into sampling signals, wherein the sampling signals can be small-voltage analog quantity signals; at least one current collection module 140 is connected with the sampling end of the control module 110 through the multi-way switch module 120; the control module 110 is configured to output a gating control signal CP1 to the multi-way switch module 120, control the multi-way switch module 120 to gate any one of the current collection modules 140, determine whether an overcurrent fault occurs according to at least one sampling signal collected by the current collection module 140, and output a driving signal CP2 according to a fault determination result to turn on or off the driving power circuit 130.
The control module 110 may be a DSP control chip.
In an embodiment, the control module 110 may be configured to determine a sample deviation of each sampling signal according to at least one sampling signal and a preset current threshold, determine a target sampling signal from the sampling signals corresponding to the middle values of all the sample deviations, and further determine whether an overcurrent fault occurs according to the target sampling signal and the preset current threshold.
In this embodiment, the hall sensor can convert a large-current analog signal into a small-voltage analog signal, and can convert a sampling signal into a digital signal in the data transmission process.
As shown in fig. 1, the power loop 130 includes: the power supply circuit comprises a signal and power isolation unit 131, a power driving unit 132 and a load unit 133, wherein the signal and power isolation unit 131 is configured to receive a driving signal CP2 output by the control module 110, and drive the power driving unit 132 to turn on or off according to the driving signal CP2, so as to drive the power circuit 130 to turn on or off.
Specifically, after the high-power load circuit is powered on, each hall sensor collects the driving current of the corresponding power circuit 130 in a non-contact hall sensing manner, and converts the collected high-power driving current signal into a sampling signal, the control module 110 outputs a gating control signal to the multi-way switch module 120 according to a preset sampling frequency, controls the multi-way switch module 120 to gate any one current collection module 140, receives the sampling signal of the gated current collection module 140, and realizes current sampling of all the power circuits 130 in a polling manner.
After the sampling signals are obtained, the control module 110 determines sample deviations of the sampling signals according to at least one sampling signal and a preset current threshold, determines a target sampling signal from the sampling signals corresponding to the intermediate values of all the sample deviations, and then determines whether an overcurrent fault occurs according to the target sampling signal and the preset current threshold. If the overcurrent fault is determined to occur, the control module 110 outputs a first driving signal, for example, the first driving signal may be a low level signal, and the power circuit 130 is quickly turned off under the driving of the first driving signal; if it is determined that the overcurrent fault does not occur, the control module 110 outputs a second driving signal, for example, the second driving signal may be a high level signal, and the power circuit 130 is kept turned on under the driving of the second driving signal. The circuit has the advantages that the problem that an overcurrent sampling result of the existing high-power driving system is inaccurate is solved by collecting a plurality of sampling signals through the Hall sensor for overcurrent judgment, the circuit is simple in structure, good in isolation performance, high in sensitivity, good in linearity and stability, capable of effectively sampling large current, capable of meeting requirements of a high-power load circuit, capable of avoiding false turn-off caused by overcurrent and capable of improving reliability of the power driving system.
Optionally, fig. 2 is a schematic structural diagram of a high-power driving protection circuit according to a second embodiment of the present invention, and on the basis of fig. 1, a specific structure of the multi-way switch module 120 is exemplarily shown.
As shown in fig. 2, the multiplexing switch module 120 includes: the one-out-of-multiple analog switch 121 and the analog-to-digital conversion unit 122 are arranged, the one-out-of-multiple analog switch 121 is provided with a plurality of input ends and an output end, the input ends are correspondingly connected with the current acquisition modules 140 one by one, the output ends are connected with the input ends of the analog-to-digital conversion unit 122, and the one-out-of-multiple analog switch 121 is used for gating any one current acquisition module 140 according to a gating control signal and transmitting a sampling signal of the current acquisition module 140 to the analog-to-digital conversion unit 122; the output end of the analog-to-digital conversion unit 122 is connected to the control module 110, and the analog-to-digital conversion unit 122 is configured to perform analog-to-digital conversion processing on the sampling signal.
In this embodiment, the one-out-of-multiple analog switch 121 may adopt an one-out-of-eight analog switch chip AD 7503.
Optionally, the gating control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.
Specifically, in the current sampling process, the control module 110 outputs a gating control signal according to a preset sampling frequency, the one-out-of-multiple analog switch 121 gates a sampling channel according to an address signal corresponding to the gating control signal, the analog-to-digital conversion unit 122 receives a sampling signal of the gated sampling channel, performs analog-to-digital conversion on the sampling signal, and converts an analog quantity signal into a digital quantity signal, thereby facilitating data transmission.
In one embodiment, the one-out-of-multiple analog switch 121 may include multiple stages of analog switch chips connected in a nested manner, so as to multiply the number of sampling channels.
Preferably, the one-out-of-multiple analog switch 121 may adopt three-level nested analog switch chips, taking the analog switch chip as an eight-out-of-one analog switch as an example, the three-level nested analog switch chips constitute 512 sampling channels, and the control module 110 sends a gating control signal to each level of analog switch chip to control any sampling channel to be turned on.
As shown in fig. 2, the multi-way switch module 120 further includes: the IO expansion unit 123, the IO expansion unit 123 includes a decoder LS1, a buffer LS2 and a latch LS3, the decoder LS1 is configured to send a first bus control signal to the buffer LS2, control the buffer LS2 to receive the sampling signal sent by the analog-to-digital conversion unit 122, and send a second bus control signal to the latch LS3, and control the latch LS3 to gate any one of the current collection modules 140.
Preferably, the decoder LS1 may be a 74LS138 three-wire-eight-wire decoder, the buffer LS2 may be a 74LS244 eight-way tri-state buffer, the latch LS3 may be a 74LS373 eight D type latch, and the first bus control signal and the second bus control signal may be eight-bit address bus signals.
Specifically, the decoder LS1 receives the gate control signal CP1 from the control module 110, sends a first bus control signal to the buffer LS2 according to the gate control signal CP1, controls the buffer LS2 to receive the digital sampling signal output by the analog-to-digital conversion unit 122, and transmits the received digital sampling signal to the control module 110 by the buffer LS 2. After obtaining the digital sampling signal, the control module 110 increases the address bit of the second bus control signal by one bit, and sends the second bus control signal with the increased address bit to the latch LS3, controls the latch LS3 to gate the next sampling channel, and so on, to implement polling sampling of multiple sampling channels. The IO port of the control module 110 is extended through the IO extension unit, so that the flexibility of control is improved.
Optionally, fig. 3 is a schematic structural diagram of a high-power driving protection circuit according to a third embodiment of the present invention, and on the basis of fig. 1, a specific structure of a power driving unit is exemplarily shown.
As shown in fig. 3, a control terminal of the signal and power isolation unit 131 is connected to the control module 110, an input terminal of the signal and power isolation unit 131 is connected to the first power supply terminal VCC1, an output terminal of the signal and power isolation unit 131 is connected to a control terminal of the power driving unit 132, and the signal and power isolation unit 131 is configured to output a level signal to the power driving unit 132 according to the driving signal; the input terminal of the power driving unit 132 is connected to the second power supply terminal, the output terminal of the power driving unit 132 is connected to the load unit 133, and the power driving unit 132 performs driving control on the load unit 133 according to the level signal.
As shown in fig. 3, the power driving unit 132 includes a power switch Q, a first filtering unit 1321 and a second filtering unit 1322, the control end of the power switch Q is electrically connected to the signal and power isolation unit 131, the input end of the power switch Q is electrically connected to the second power supply terminal VCC2, and the output end of the power switch Q is electrically connected to the load unit; a first end of the first filtering unit 1321 is electrically connected with a control end of the power switch tube Q, and a second end of the first filtering unit 1321 is electrically connected with an output end of the power switch tube Q; a first end of the second filtering unit 1322 is electrically connected to the input end of the power switch tube Q, and a second end of the second filtering unit 1322 is electrically connected to the output end of the power switch tube Q.
The first power supply terminal VCC1 may be configured to provide a dc +5V voltage, and the second power supply terminal VCC2 may be configured to provide a dc +28V voltage.
In an embodiment, the power switch Q may be an NPN MOS transistor, the first filtering unit 1321 is configured to perform voltage stabilization and filtering on the gate-source voltage, and the second filtering unit 1322 is configured to perform voltage stabilization and filtering on the source-drain voltage.
In one embodiment, the signal and power isolation unit 131 may be integrated with an optical coupling isolation power unit, which may output a dc +15V voltage under the trigger of a high level signal and cut off the output voltage at the rear end under the trigger of a low level signal.
Specifically, if the control module 110 determines that the power circuit 130 has an overcurrent fault, the driving signal output by the control module 110 is a low level signal, and after receiving the low level signal, the signal and power isolation unit 131 cuts off the output voltage at the rear end, the driving level signal of the power switch Q becomes 0, the drain input and the source output of the power switch Q are disconnected, and the load unit 133 at the rear end is cut off; if the control module 110 determines that the power loop 130 has no overcurrent fault, the driving signal output by the control module 110 is a high level signal, and after the signal and power isolation unit 131 receives the high level signal, the signal and power isolation unit outputs a dc +15V level signal, the drain input and the source output of the MOSFET are turned on, the power loop 130 is turned on, and the +28V power provided by the second power supply terminal VCC2 supplies power to the load unit 133. The overcurrent protection of a high-power load is realized through the control of the signal and power isolation unit and the power switch tube, the reliability of the circuit is improved by the filter unit, the circuit structure is simple, the isolation performance is good, and the reliability of a power driving system is improved.
The fourth embodiment of the invention also provides a high-power drive protection method which is realized based on any one of the high-power drive protection circuits.
Fig. 4 is a flowchart of a high-power driving protection method according to a fourth embodiment of the present invention.
As shown in fig. 4, the high power driving protection method includes the following steps:
step S1: and outputting a gating control signal to the multi-way switch module to control the multi-way switch module to gate any current acquisition module.
In this embodiment, the current collection module is provided with a hall sensor, and the current collection module collects the driving current of the high-power load loop according to a non-contact hall sensing mode and converts a large-current signal into a small-voltage analog signal.
In an embodiment, the multi-way switch module may be configured to obtain the sampling signal output by the current collection module, and convert the analog sampling signal into a digital sampling signal, which is convenient for data transmission.
Step S2: and judging whether an overcurrent fault occurs according to at least one sampling signal acquired by the current acquisition module.
Step S3: and outputting a driving signal according to the fault judgment result, and driving the power loop to be switched on or switched off.
Optionally, the gating control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.
Illustratively, the strobe control signal may be determined by the level signals output from the pins XA1 to XA5 of the control chip.
In one embodiment, after the gating control signal is obtained, a decoder is used for decoding the gating control signal to obtain a gating address signal, a first bus control signal is sent to the buffer according to the gating address signal, and the buffer is controlled to receive the digital sampling signal. After the digital sampling signal is obtained, the address bit of the second bus control signal is increased by one bit, the second bus control signal with the increased address bit is sent to the latch, the latch is controlled to gate the next sampling channel, and so on, and polling sampling of a plurality of sampling channels is realized.
Optionally, fig. 5 is a flowchart of another high-power driving protection method according to a fourth embodiment of the present invention.
As shown in fig. 5, the high-power driving protection method specifically includes the following steps:
step S1: and outputting a gating control signal to the multi-way switch module to control the multi-way switch module to gate any current acquisition module.
Step S201: and determining a sample deviation sequence of each sampling signal according to at least one sampling signal and a preset current threshold value.
The sample deviation sequence is obtained by sequencing the sample deviations between the sampling signals and the preset current threshold value in the descending order.
Step S202: a target sample signal is determined from the sequence of sample offsets.
In one embodiment, the target sampling signal may be a sampling signal corresponding to a middle value of the sample offset sequence.
Step S203: and judging whether an overcurrent fault occurs according to the target sampling signal and a preset current threshold value.
Step S3: and outputting a driving signal according to the fault judgment result, and driving the power loop to be switched on or switched off.
Specifically, the steps S201 to S203 describe a specific embodiment of determining whether an overcurrent fault occurs according to at least one sampling signal collected by the current collection module. Calculating a sample deviation value of each sampling signal and a preset current threshold value through multiple sampling, taking a middle value in a square difference mode as a target sampling signal, comparing the target sampling signal with the preset current threshold value, and judging that the overcurrent fault of the power circuit occurs if the target sampling signal is greater than the preset current threshold value; and if the target sampling signal is less than or equal to the preset current threshold, judging that no overcurrent fault occurs. Overcurrent judgment is carried out through a plurality of sampling signals, false turn-off caused by false overcurrent is avoided, and reliability of the power driving system is improved.
Based on any one of the above embodiments, a fifth embodiment of the present invention further provides an electronic device.
Fig. 6 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention.
As shown in fig. 6, the electronic device 100 includes the high power driving protection circuit 00.
In this embodiment, the electronic device 100 may be an avionics device.
In summary, the high power driving protection circuit, the method and the electronic device provided by the embodiments of the invention, the drive protection circuit is provided with a control module, a multi-way switch module, at least one power loop and at least one Hall sensor, the Hall sensors are used for collecting the heavy current corresponding to the power loop, the control module gates and receives the sampling signal of any Hall sensor, judging whether overcurrent fault occurs according to at least one sampling signal, outputting a driving signal according to a fault judgment result, and driving a power loop to be switched on or switched off, so that the problem that the overcurrent sampling result of the conventional high-power driving system is inaccurate is solved, the circuit structure is simple, the high-power load circuit can effectively sample large current, meets the requirements of a high-power load circuit, carries out overcurrent judgment through a plurality of sampling signals, avoids false turn-off caused by false overcurrent, and improves the reliability of a power driving system.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A high power drive protection circuit, comprising: the power circuit comprises a control module, a multi-way switch module, at least one power loop and at least one current acquisition module, wherein the current acquisition modules are arranged in one-to-one correspondence with the power loops and comprise Hall sensors, and the Hall sensors are used for acquiring current parameters of the power loops and converting the current parameters into sampling signals;
the at least one current acquisition module is connected with the sampling end of the control module through the multi-way switch module;
the control module is used for outputting gating control signals to the multi-path switch module, controlling the multi-path switch module to gate any one current acquisition module, judging whether an overcurrent fault occurs according to at least one sampling signal acquired by the current acquisition module, outputting driving signals according to a fault judgment result, and driving the power circuit to be switched on or switched off.
2. The high power drive protection circuit of claim 1, wherein the multi-way switch module comprises: the multi-selection analog switch is provided with a plurality of input ends and an output end, the input ends are connected with the current acquisition modules in a one-to-one correspondence manner, the output ends are connected with the input ends of the analog-to-digital conversion unit, and the multi-selection analog switch is used for gating any one current acquisition module according to a gating control signal and transmitting a sampling signal of the current acquisition module to the analog-to-digital conversion unit;
the output end of the analog-to-digital conversion unit is connected with the control module, and the analog-to-digital conversion unit is used for performing analog-to-digital conversion processing on the sampling signal.
3. The high power driving protection circuit according to claim 2, wherein the one-out-of-multiple analog switch comprises a plurality of stages of nested analog switch chips.
4. The high power drive protection circuit of claim 2, wherein the multi-way switch module further comprises: the IO expansion unit comprises a buffer, a decoder and a latch, wherein the decoder is used for sending a first bus control signal to the buffer, controlling the buffer to receive a signal sent by the analog-to-digital conversion unit, sending a second bus control signal to the latch and controlling the latch to gate any current acquisition module.
5. The high power drive protection circuit of claim 1, wherein the power loop comprises: the control end of the signal and power supply isolation unit is connected with the control module, the input end of the signal and power supply isolation unit is connected with the first power supply end, the output end of the signal and power supply isolation unit is connected with the control end of the power drive unit, and the signal and power supply isolation unit is used for outputting a level signal to the power drive unit according to the drive signal;
the input end of the power driving unit is connected with the second power supply end, the output end of the power driving unit is connected with the load unit, and the power driving unit performs driving control on the load unit according to the level signal.
6. The high-power driving protection circuit according to claim 5, wherein the power driving unit comprises a power switch tube, a first filtering unit and a second filtering unit, a control end of the power switch tube is electrically connected with the signal and power isolation unit, an input end of the power switch tube is electrically connected with the second power supply end, and an output end of the power switch tube is electrically connected with the load unit;
the first end of the first filtering unit is electrically connected with the control end of the power switch tube, and the second end of the first filtering unit is electrically connected with the output end of the power switch tube;
the first end of the second filtering unit is electrically connected with the input end of the power switch tube, and the second end of the second filtering unit is electrically connected with the output end of the power switch tube.
7. The power driving protection circuit according to any one of claims 1 to 6, wherein the gate control signal is an N-bit address signal, where N is a positive integer greater than or equal to 2.
8. A high-power driving protection method, which is implemented based on the high-power driving protection circuit of any one of claims 1 to 7, and comprises:
outputting a gating control signal to a multi-path switch module to control the multi-path switch module to gate any current acquisition module;
judging whether an overcurrent fault occurs according to at least one sampling signal acquired by the current acquisition module;
and outputting a driving signal according to the fault judgment result, and driving the power loop to be switched on or switched off.
9. The high-power driving protection method according to claim 8, wherein judging whether an overcurrent fault occurs according to at least one sampling signal collected by the current collection module comprises:
determining a sample deviation sequence of each sampling signal according to the at least one sampling signal and a preset current threshold;
determining a target sampling signal according to the sample deviation sequence;
and judging whether an overcurrent fault occurs according to the target sampling signal and the preset current threshold.
10. An electronic device comprising the high power drive protection circuit of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111457741.9A CN114142427A (en) | 2021-12-02 | 2021-12-02 | High-power drive protection circuit and method and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111457741.9A CN114142427A (en) | 2021-12-02 | 2021-12-02 | High-power drive protection circuit and method and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114142427A true CN114142427A (en) | 2022-03-04 |
Family
ID=80386629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111457741.9A Pending CN114142427A (en) | 2021-12-02 | 2021-12-02 | High-power drive protection circuit and method and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114142427A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117997144A (en) * | 2024-04-02 | 2024-05-07 | 珠海格力电器股份有限公司 | Main control drive integrated circuit, controller main board and air conditioning equipment |
-
2021
- 2021-12-02 CN CN202111457741.9A patent/CN114142427A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117997144A (en) * | 2024-04-02 | 2024-05-07 | 珠海格力电器股份有限公司 | Main control drive integrated circuit, controller main board and air conditioning equipment |
| CN117997144B (en) * | 2024-04-02 | 2024-06-07 | 珠海格力电器股份有限公司 | Main control drive integrated circuit, controller main board and air conditioning equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101989246A (en) | Electronic device capable of automatically switching master and slave equipment modes of universal serial bus (USB) | |
| CN103678226A (en) | General purpose input/output (GPIO) port reuse circuit and method of chip | |
| US11271558B2 (en) | Smart electronic switch | |
| CN114142427A (en) | High-power drive protection circuit and method and electronic equipment | |
| US9735704B2 (en) | Apparatus for controlling inverter current and method of operating the same | |
| US11959948B2 (en) | High voltage signal and low voltage signal sampling and transmission system based on high voltage MCU | |
| CN110535666B (en) | Nonstandard PoE power management device | |
| CN1052232A (en) | Switching device with cascaded switch sections | |
| CN110501559B (en) | Current collecting device | |
| CN115459754A (en) | Current-mode and voltage-mode analog quantity signal acquisition switching circuit and control method | |
| CN110971216B (en) | Overcurrent protection circuit | |
| CN114578729B (en) | Acquisition module of solid-state power distribution device | |
| CN102857231A (en) | Key testing circuit | |
| CN115940110A (en) | Voltage selection circuit, voltage selection system and electronic device | |
| CN210401585U (en) | Combiner switch circuit | |
| CN108616278A (en) | A kind of discrete magnitude, analog quantity normalization Acquisition Circuit and method | |
| CN111555246A (en) | Drive chip, intelligent power and air conditioner | |
| CN220730304U (en) | Acquisition circuit of switching value signal and elevator controller | |
| CN117406653B (en) | Analog output device and industrial controller | |
| CN202798679U (en) | Key detection circuit | |
| CN112596462B (en) | Output method, device and system based on signal type | |
| CN115993480B (en) | Overcurrent detection circuit for bridge type driving circuit | |
| KR100468467B1 (en) | Receive line defective wiring checking apparatus | |
| CN115201649B (en) | Driving circuit for realizing IGBT state monitoring by spontaneous short-circuit current | |
| CN210669516U (en) | Overcurrent protection circuit of switch reluctance motor driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |