A fault handling apparatus and method

Abstract

The application discloses a kind of fault processing device and method, the device includes: voltage output module, load characteristic adaptive module, fault detection module and fault processing module;Wherein, voltage output module, for outputing to be identified voltage;Load characteristic adaptive module, for determining the critical voltage corresponding to the load to be used according to the actual working resistance and rated working voltage corresponding to the load to be used;Fault detection module, for determining the fault type corresponding to voltage output device based on the critical voltage and to be identified voltage;Fault processing module, for calling the fault processing mode corresponding to the fault type, and corresponding fault processing is carried out to voltage output device based on fault processing mode.Accurate detection load driving device corresponding to the effect of fault type is obtained, and corresponding fault processing mode is called in time to carry out fault processing.

Description

Technical Field

[0001] This invention relates to the field of fault handling technology, and in particular to a fault handling device and method. Background Technology

[0002] The stability, safety, accuracy, and timeliness of high-power load drives have always been important indicators for evaluating load drive characteristics.

[0003] In existing technologies, fault detection of the load drive device is typically performed by setting a fixed voltage and using the preset voltage and the voltage that the load can withstand. However, due to factors such as communication bus issues, the load drive device may have poor stability, resulting in inaccurate fault detection.

[0004] To address the aforementioned issues, it is necessary to improve the fault detection method for load drive devices so that fault handling can be performed based on the corresponding fault handling procedures. Summary of the Invention

[0005] This invention provides a fault handling device and method to solve the problem of inaccurate fault detection of load drive devices.

[0006] In a first aspect, embodiments of the present invention provide a fault handling device, comprising: a voltage output module, a load characteristic adaptive module, a fault detection module, and a fault handling module; wherein,

[0007] The voltage output module is used to output the voltage to be identified;

[0008] The load characteristic adaptive module is used to determine the critical voltage corresponding to the load to be used based on the actual operating resistance and rated operating voltage of the load to be used; wherein, the critical voltage includes an upper critical voltage and a lower critical voltage.

[0009] A fault detection module is used to determine the fault type corresponding to the voltage output device based on the voltage to be identified and the threshold voltage; wherein the voltage output device includes at least one voltage output channel;

[0010] The fault handling module is used to retrieve the fault handling method corresponding to the fault type, and to perform corresponding fault handling on the voltage output device based on the fault handling method.

[0011] Secondly, embodiments of the present invention also provide a fault handling method, including:

[0012] Receive the voltage to be identified output from the voltage output channel;

[0013] Based on the actual operating resistance and actual operating voltage corresponding to the load to be used, determine the critical voltage corresponding to the load to be used; wherein, the critical voltage to be determined includes an upper critical voltage and a lower critical voltage.

[0014] Based on the voltage to be identified and the critical voltage, determine the fault type corresponding to the voltage output device;

[0015] Retrieve the fault handling method corresponding to the fault type, and perform corresponding fault handling on the voltage output device based on the fault handling method.

[0016] This embodiment includes a voltage output module, a load characteristic adaptive module, a fault detection module, and a fault handling module. The voltage output module outputs a voltage to be identified. The load characteristic adaptive module determines a critical voltage corresponding to the load to be used based on the actual operating resistance and rated operating voltage. A voltage-current characteristic curve is obtained using the current to be determined and the rated operating voltage corresponding to the load, and the critical voltage is determined based on the voltage-current characteristic curve. The fault detection module determines the fault type of the voltage output device based on the voltage to be identified and the critical voltage. The voltage output device includes at least one voltage output channel. By comparing the voltage values ​​of the voltage to be identified and the critical voltage, a voltage range corresponding to the voltage to be identified can be determined, and the fault type of the voltage output channel corresponding to the voltage to be identified can be determined based on the determined voltage range. The fault handling module retrieves a fault handling method corresponding to the fault type and performs corresponding fault handling on the voltage output module based on the fault handling method. This solves the problem of inaccurate fault detection of load drive devices, accurately identifies the fault type of the load drive device, and retrieves the corresponding fault handling method for timely fault handling.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a fault handling device provided in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a load characteristic adaptive module according to Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a critical voltage determination unit provided in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a fault handling device provided in Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a load characteristic adaptive module according to Embodiment 1 of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a fault detection module according to Embodiment 2 of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a fault determination unit according to Embodiment 2 of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a diagnostic voltage acquisition module according to Embodiment 2 of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of a fault detection strategy module provided in Embodiment 2 of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of a channel fault diagnosis unit according to Embodiment 2 of the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of a high-side OFF state fault diagnosis strategy unit provided in Embodiment 2 of the present invention;

[0030] Figure 12 This is a schematic diagram of a low-side OFF state fault diagnosis strategy unit provided in Embodiment 2 of the present invention;

[0031] Figure 13 This is a schematic diagram of a high-side ON state fault diagnosis strategy unit according to Embodiment 2 of the present invention;

[0032] Figure 14 This is a schematic diagram of the structure of a low-side ON state fault diagnosis strategy unit according to Embodiment 2 of the present invention;

[0033] Figure 15This is a schematic diagram of a high-low side ON state fault diagnosis strategy unit provided in Embodiment 2 of the present invention. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0036] Before elaborating on this technical solution in detail, let's briefly introduce its application scenarios to help us understand it more clearly.

[0037] For high-power load drive devices, stability, safety, accuracy, and timeliness are crucial performance indicators. Stability ensures that the drive voltage remains stable throughout its lifespan, unaffected by external interference. Safety ensures immediate protection against sudden voltage fluctuations caused by short circuits or open circuits, preventing irreversible damage to the load and wiring harness. Timeliness guarantees the device outputs the ideal operating voltage immediately based on set parameters, minimizing hysteresis. Accuracy minimizes misjudgments in diagnosing various operating conditions and faults.

[0038] However, existing load drive devices suffer from drawbacks such as poor drive stability, insufficient voltage control accuracy, and failure to provide timely protection for the driven load due to limitations in control strategies and communication buses. Therefore, if the control strategy can balance the interrelationships among stability, safety, accuracy, and timeliness, the compatibility between the drive device and the controlled load can be effectively improved. Based on this, this technical solution proposes a fault detection method integrated into a fault detection device. This method adaptively detects faults in the load drive device and, when a fault occurs, invokes the appropriate fault handling method to ensure the normal operation of the load drive device.

[0039] Example 1

[0040] Figure 1 This is a schematic diagram of a fault handling device provided in Embodiment 1 of the present invention. This embodiment can be applied to the situation where the load in the load drive device is adaptively fault detected, so as to timely discover and determine the fault type of the load drive device, and to handle the fault based on the corresponding fault handling method.

[0041] like Figure 1 As shown, the device includes: a voltage output module 100, a load characteristic adaptive module 200, a fault detection module 300, and a fault handling module 400.

[0042] Specifically, the voltage output module 100 is used to output the voltage to be identified.

[0043] In practical applications, the fault handling device provided in this technical solution can be used to detect faults in the load drive device to determine whether there are any abnormalities in the load drive device, and if there are any abnormalities, the corresponding fault handling can be carried out in a timely manner according to the fault type of the load in the load drive device.

[0044] The voltage to be identified can be understood as the voltage corresponding to the load in the load drive device, set by the voltage output module 100. For example, the voltage output module 100 can set the corresponding drive waveform and the corresponding voltage. Specifically, when setting the voltage magnitude based on the voltage output module 100, it can be set by adjusting the voltage amplitude.

[0045] In this technical solution, the voltage output module 100 can be equipped with an internal clock unit to control the generation of complex drive waveforms, thereby generating a specific drive waveform corresponding to the applied load. For example, the voltage output module can be a signal generator device, through which different voltage waveforms can be set, such as constant voltage waveforms, pulse width modulation voltage waveforms (i.e., PWM voltage waveforms), or sinusoidal voltage waveforms, etc. For long voltage waveforms, the voltage output module 100 can directly output the set voltage amplitude according to the voltage requirement corresponding to the load; for PWM voltage waveforms, the voltage output frequency and voltage duty cycle can be set based on the voltage output module 100, and after setting, the internal clock unit of the voltage output module 100 directly calculates the duration of the high and low levels of the output voltage based on the voltage duty cycle and voltage output frequency, and then outputs the high and low levels through the voltage output module 100. For the generation of arbitrary voltage waveforms, arbitrary voltage waveforms can be drawn by importing files. For example, an Excel file or CSV file can be generated based on the obtained voltage information, and the generated file can be imported into the voltage output module 100 so that the voltage output module 100 can output the corresponding driving voltage based on the voltage information in the file.

[0046] Specifically, the load characteristic adaptive module 200 is used to determine the critical voltage corresponding to the load to be used based on the actual working resistance and rated working voltage corresponding to the load to be used.

[0047] In this context, the load to be used can be understood as the load being tested. To facilitate fault detection of the load drive device, different types of loads can be connected to the fault handling device, and the fault detection module 300 in the fault handling device can determine whether the load to be used is abnormal. The actual operating resistance can be understood as the resistance of the load to be used during operation, and the rated operating voltage can be understood as the optimal voltage for the load to operate stably over a long period. In practical applications, the actual operating resistance of the load to be used may change due to factors such as temperature. Simultaneously, the voltage during actual operation may be higher or lower than the rated voltage of the load to be used. Therefore, to determine whether the load to be used will experience abnormalities during actual operation, it is necessary to calculate the voltage threshold corresponding to the actual operation of the load to be used, i.e., the critical voltage. The upper and lower critical voltage limits represent the highest and lowest voltages that the load to be used can actually withstand during operation.

[0048] When performing fault detection on a load drive device, the voltage information corresponding to the load to be used in the load drive device can be detected. Specifically, after the load to be used is connected to the fault handling device, the voltage output module 100 sets the drive waveform corresponding to the load to be used, determines the voltage to be identified corresponding to the load to be used, and the load characteristic adaptive module 200 determines the critical voltage corresponding to the load to be used. Based on the critical voltage and the load to be used voltage, it is determined whether there is an abnormality in the load to be used, and thus it is determined whether the load drive device will malfunction during operation.

[0049] Optional, load characteristic adaptive module 200, such as Figure 2 As shown, it includes: a load parameter acquisition unit 210, used to input the actual working resistance and rated working voltage corresponding to the load to be used in at least one parameter editing control; a current determination unit 220, used to determine the current to be determined corresponding to the load to be used based on the ratio of the rated working voltage and the actual working resistance; and a critical voltage determination unit 230, used to determine the critical voltage corresponding to the load to be used based on the current to be determined and the actual working resistance.

[0050] The parameter editing control can be understood as an editing control used to input the load parameters corresponding to the load to be used. The current to be determined can be understood as the current carried by the load in actual operation.

[0051] Specifically, in the parameter editing control of the control panel of the load parameter acquisition unit 210, the actual operating resistance and rated operating voltage corresponding to the load to be used are input. The ratio between the rated operating voltage and the actual operating resistance is determined by the current determination unit 220, which serves as the current to be determined corresponding to the load. Further, after obtaining the current to be determined, a voltage-current characteristic curve corresponding to the load to be used can be constructed based on the current to be determined, and the critical voltage corresponding to the load to be used can be determined based on the voltage-current characteristic curve.

[0052] Optionally, the critical voltage includes an upper critical voltage and a lower critical voltage, and the critical voltage determination unit 230, such as... Figure 3 As shown, it includes: a characteristic curve determination subunit 231, used to construct a current-voltage characteristic curve corresponding to the load to be used based on the current to be determined and the rated operating voltage; and a critical voltage determination subunit 232, used to determine the upper limit critical voltage corresponding to the load to be used based on the maximum value of the current-voltage characteristic curve, and to determine the lower limit critical voltage corresponding to the load to be used based on the minimum value of the current-voltage characteristic curve.

[0053] Among them, the voltage-current characteristic curve can be used to characterize the relationship between the voltage and current of the load to be used.

[0054] Understandably, the actual operating resistance of the load under test changes continuously during operation, and therefore, the corresponding current to be determined also changes continuously. Simultaneously, the actual operating voltage of the load under test also changes. Based on the current to be determined and the actual operating voltage, the voltage-current characteristic curve corresponding to the load under test can be determined. Furthermore, based on the maximum value in the voltage-current characteristic curve, the upper limit critical voltage corresponding to the load under test can be determined, and based on the minimum value in the voltage-current characteristic curve, the lower limit critical voltage corresponding to the load under test can be determined.

[0055] Specifically, the fault handling device includes a fault detection module 300, which is used to determine the fault type corresponding to the voltage output module based on the voltage to be identified and the critical voltage.

[0056] In practical applications, the fault detection module 300 can accept the voltage to be identified and the critical voltage corresponding to the load to be used, compare the voltage to be identified and the critical voltage, and determine the fault type of the voltage output channel corresponding to the load to be used in the voltage output module based on whether the voltage to be identified meets the corresponding critical voltage range.

[0057] It should be noted that the voltage output module includes at least one voltage output channel, each of which can be connected to a load to be used, and one or more loads to be used can be connected to the voltage output device simultaneously. For any voltage output channel, the fault detection module 300 can determine the fault type of the voltage output channel corresponding to the load to be used based on the identification voltage and critical voltage of the load to be used connected to the corresponding voltage output channel.

[0058] To more clearly illustrate the fault detection module 300's process of determining fault types, the fault detection module 300 will be described in detail in subsequent embodiments.

[0059] The fault handling module 400 is used to retrieve the fault handling method corresponding to the fault type and perform corresponding fault handling on the voltage output module based on the fault handling method.

[0060] In a specific example, such as Figure 4As shown, the fault handling device provided by this technical solution mainly includes a voltage output module 100, a load characteristic adaptive module 200, a load self-protection module 300, and a fault detection module 400. The voltage output module 100 can output the corresponding voltage drive waveform based on the parameter information input by the user. Furthermore, based on its self-protection function, the voltage output channel can perform corresponding fault logic judgments according to the channel's parameter information and channel type, and output the judgment results to the load adaptive protection module 200. Further, when a fault occurs in the voltage output channel, the fault detection module 300 can determine the fault type corresponding to the voltage output channel and send the fault type to the fault handling module 400. The fault handling module 400 then retrieves the fault handling method corresponding to the fault type for fault handling. For example, the fault information can be sent to the display unit of the voltage output module 100 to report the current channel fault. To ensure that the static settings of various fault thresholds and counters in the fault detection module conform to the specifications of the current load, the module will perform adaptive matching of the characteristics of the current load and adapt a set of corresponding static fault parameters for the current drive load to reduce the occurrence of false alarms.

[0061] To better understand this technical solution, a detailed description of the load characteristic adaptive module in the fault handling device is provided. For example... Figure 5 As shown, the load characteristic self-use module includes a static parameter acquisition unit that can acquire the resistance value of the load to be used (i.e., the actual working resistance) and the rated working voltage of the current output channel. This allows for the calculation of the current load's working current (i.e., the current to be determined), and the voltage, current, and resistance parameters are then passed to the static parameter adaptation unit. Furthermore, the operating circuit is simulated based on these parameters, avoiding the impact on the real load during the process of seeking stable static parameter values ​​under actual load conditions. It should be noted that during operation, the simulation circuit monitors the voltage, current, and static parameters through a parameter monitoring unit, and simulates circuit faults under the virtual load. Under the condition that the observed variables do not undergo abrupt changes, the static parameters are adaptively adjusted. Finally, the optimal static parameters are configured into each functional module.

[0062] It is understandable that the static parameters of the control system of each module in the equipment will also differ depending on the characteristics of the load to be used. Therefore, each channel needs to obtain the load characteristics of the current channel so that the static parameters inside the equipment can be adjusted accordingly.

[0063] This embodiment includes a voltage output module, a load characteristic adaptive module, a fault detection module, and a fault handling module. The voltage output module outputs a voltage to be identified. The load characteristic adaptive module determines a critical voltage corresponding to the load to be used based on the actual operating resistance and rated operating voltage. A voltage-current characteristic curve is obtained using the current to be determined and the rated operating voltage corresponding to the load, and the critical voltage is determined based on the voltage-current characteristic curve. The fault detection module determines the fault type of the voltage output device based on the voltage to be identified and the critical voltage. The voltage output device includes at least one voltage output channel. By comparing the voltage values ​​of the voltage to be identified and the critical voltage, a voltage range corresponding to the voltage to be identified can be determined, and the fault type of the voltage output channel corresponding to the voltage to be identified can be determined based on the determined voltage range. The fault handling module retrieves a fault handling method corresponding to the fault type and performs corresponding fault handling on the voltage output module based on the fault handling method. This solves the problem of inaccurate fault detection of load drive devices, accurately identifies the fault type of the load drive device, and retrieves the corresponding fault handling method for timely fault handling.

[0064] Example 2

[0065] To more clearly illustrate the fault handling device provided in this technical solution, the fault detection module 300 in the fault handling device is described in detail.

[0066] In this technical solution, the core functions of the fault detection module 300 include a diagnostic voltage acquisition module, a fault detection strategy module, a channel fault diagnosis unit, a high-side OFF state fault diagnosis strategy module, a low-side OFF state fault diagnosis strategy module, a high-side ON state fault diagnosis strategy module, a low-side ON state fault diagnosis strategy module, and a high-low-side ON state fault diagnosis strategy module.

[0067] like Figure 6 As shown, Figure 6 This is a schematic diagram of the fault detection module 300, which includes: a switch status determination unit 310, a channel type determination unit 320, a channel working status determination unit 330, and a fault type determination unit 340.

[0068] The unit includes a switch state determination unit 310, which acquires the first switch state of the high-side drive and the second switch state of the low-side drive of the voltage output channel; a channel type determination unit 320, which determines the channel type of the voltage output channel based on the first switch state and the second switch state; a channel operating state determination unit 330, which determines the channel operating state corresponding to the voltage output channel based on the voltage to be identified and the channel type, wherein the channel operating state includes a start state or a stop state; and a fault type determination unit 340, which determines the fault type corresponding to the voltage output channel based on the channel operating state.

[0069] Specifically, such as Figure 6 As shown, after acquiring the voltage to be identified from the voltage output channel of the voltage output module 100, the switch state determination unit 310 detects the switch state of the voltage output channel corresponding to the voltage to be identified. For example, based on the voltage waveform of the voltage to be identified, it can be determined whether the voltage to be identified is in an OFF working state, i.e., a closed state. If there is no OFF working state, the pulse signal of the current voltage output channel is triggered to collect the voltage to be identified in the current voltage output channel in the OFF state and the ON state (start state) to determine whether there is a fault in the voltage output channel corresponding to the voltage to be identified, and if there is a fault, the corresponding fault type is determined.

[0070] Furthermore, when determining the fault type corresponding to the voltage output channel, it is necessary to determine the channel type corresponding to the voltage output channel based on the channel type determination unit 320. In this technical solution, the channel types include single-sided channels, high-low-side channels, and peak-hold channels (i.e., voltage peak-holding channels). Based on this, after determining the channel type and channel switching state corresponding to the voltage output channel, the channel state of the voltage output channel is determined to further determine the fault type of the voltage output channel.

[0071] In this technical solution, the fault determination unit 340 uses different methods to determine channel faults depending on the channel's operating state. When the channel is in a high-side closed state, the fault type of the voltage output channel can be determined by comparing the voltage to be identified output by the voltage output channel with the critical voltage. Optionally, when the channel is in a high-side closed state, the fault determination unit 340, as follows: Figure 7As shown, it includes: a first high-side fault determination subunit 341, used to determine that the voltage output channel is in normal operation if the voltage to be identified is less than the lower threshold voltage; a second high-side fault determination subunit 342, used to determine that the fault type of the voltage output channel is the load open circuit type if the voltage to be identified is greater than the lower threshold voltage and less than the upper threshold voltage; and a third high-side fault determination subunit 343, used to determine that the fault type of the voltage output channel is the high-side short source type if the voltage to be identified is greater than the upper threshold voltage.

[0072] Optionally, the channel operating state is low-side channel off, and the fault determination unit 340, such as... Figure 7 As shown, it includes: a first low-side fault determination subunit 344, used to determine the fault type of the voltage output channel as low-side short-to-ground type if the voltage to be identified is less than the lower threshold voltage; a second low-side fault determination subunit 345, used to determine the fault type of the voltage output channel as load open-circuit type if the voltage to be identified is greater than the lower threshold voltage and less than the upper threshold voltage; and a third low-side fault determination subunit 346, used to determine the fault type of the voltage output channel as normal operation type if the voltage to be identified is greater than the upper threshold voltage.

[0073] Optionally, the channel operates in a high-side start-up state, and the fault determination unit 340 is used to determine the fault type of the voltage output channel as a high-side short-to-ground type when the voltage to be identified is less than the lower limit critical voltage.

[0074] Optionally, the channel operating state is low-side start-up state, and the fault determination unit 340 is used to determine the fault type of the voltage output channel as low-side short source type when the voltage to be identified is greater than the upper limit critical voltage.

[0075] Optionally, the channel operates in a high-low side combined start-up state. The fault determination unit 340 is used to determine the fault type of the voltage output channel as an interphase overcurrent fault type when the voltage to be identified is greater than the overcurrent sampling voltage corresponding to the load to be used.

[0076] In a specific example, such as Figure 8 As shown, the operating voltage of the output channel is acquired, and the output waveform of the channel is checked to see if there is an OFF operating state. If there is no OFF operating state, the diagnostic pulse generation unit is activated for the current channel. The channel voltage acquired in the OFF state and the channel voltage acquired in the ON state are transmitted to the fault detection strategy module. Further, as... Figure 9As shown, the channel type is determined based on the fault detection strategy module (i.e., the channel type determination unit 320). The fault detection module 300 operates as follows: it distinguishes between single-sided channels, high / low-side channels, and Peak Hold channels based on the channel type. The current channel type is input to the fault diagnosis unit to execute the corresponding channel fault detection strategy. Furthermore, the operating voltage acquired by the diagnostic voltage acquisition module is input to the channel fault diagnosis unit to determine various types of channel faults.

[0077] Based on the above, such as Figure 10 As shown, the working process of the channel fault diagnosis unit (i.e., fault type determination unit 340) is as follows: The channel fault diagnosis unit obtains the currently diagnosed channel type and channel voltage. If it is a high-side channel type, the OFF state of the driving waveform is determined (i.e., the channel operating state is high-side channel off). If it is a high-low side combined channel form, an open-circuit voltage regulator is used to perform a high-side OFF state fault diagnosis strategy when the other low-side channel type is not OFF. If it is a single-side channel type, the high-side OFF state fault diagnosis strategy is directly performed. Then, the ON state of the high-side channel type is determined. If it is a high-low side combined channel form (i.e., the channel operating state is high-low side combined start state), a high-low side ON state fault diagnosis strategy is only performed when both the high and low sides are ON. If it is a single-side channel, the high-side ON state fault diagnosis strategy is directly performed. If the current channel type is low-side, then the OFF state of the drive waveform is checked. If it's a high-low side combined channel, an open-circuit voltage regulator is used for low-side OFF state fault diagnosis when the other high-side channel is not OFF. If it's a single-side channel, the low-side OFF state fault diagnosis strategy is directly applied (i.e., the channel is in low-side off state). Then, the ON state of the low-side channel type is checked (i.e., the channel is in low-side on state). If it's a high-low side combined channel, the high-low side ON state diagnosis strategy is only applied when both the high and low sides are ON. If it's a single-side channel, the low-side ON state fault diagnosis strategy is directly applied.

[0078] Among them, when determining the fault type, such as Figure 11As shown, the specific process of the fault diagnosis strategy for the high-side OFF state is as follows: After acquiring the channel voltage, a voltage threshold judgment is performed. If the voltage is less than threshold A and the duration is greater than the delay time (Tflt) of the internal clock driver in the fault filtering unit, then the channel state is determined to be normal. If the voltage is greater than threshold A, less than threshold B, and the duration is also greater than Tflt, then the channel state is determined to be open circuit. If the voltage threshold is greater than B and the duration is still greater than Tflt, then the high-side short source condition is determined (i.e., the fault type is determined based on the third high-side fault determination subunit 343). The fault code is then reported to the display unit and the protection unit.

[0079] like Figure 12 As shown, the specific process of the fault diagnosis strategy for the low-side OFF state is as follows: After acquiring the channel voltage, a voltage threshold judgment is performed. If the voltage is less than threshold A and the duration is greater than the time Tflt in the fault filtering unit, then the channel state is determined to be in a low-side short-ground state (i.e., the fault type is determined based on the first low-side fault determination subunit 344). If the voltage is greater than threshold A and less than threshold B, and the duration is also greater than the time Tflt, then the channel state is determined to be in an open-circuit state. If the voltage threshold is greater than B and the duration is still greater than Tflt, then the situation is determined to be normal, and the fault code is reported to the display unit and the protection unit.

[0080] like Figure 13 As shown, the specific process of the fault diagnosis strategy for the high-side ON state is as follows: After obtaining the channel voltage, a voltage threshold judgment is performed. If the voltage is less than the threshold A and the duration is greater than the Tflt time in the fault filtering unit, then the channel state is determined to be in the case of high-side short-ground (i.e., the fault type is determined based on the fault determination unit 340). The fault code is then reported to the display unit and the protection unit.

[0081] like Figure 14 As shown, the specific process of the fault diagnosis strategy for the low-side ON state is as follows: After obtaining the channel voltage, a voltage threshold judgment is performed. If the voltage is greater than threshold B and the duration is greater than the Tflt time in the fault filtering unit, then the channel state is determined to be in the low-side short-source condition (i.e., the fault type is determined based on the fault determination unit 340). The fault code is then reported to the display unit and the protection unit.

[0082] like Figure 15As shown, the specific process of the fault diagnosis strategy for the high and low side ON state is as follows: obtain the channel voltage U at this time and compare it with the set voltage value U0 for channel overcurrent. If the channel voltage U is greater than the set overcurrent voltage value U0, then the channel state at this time is determined to be phase-to-phase overcurrent (that is, the fault type is determined based on the fault determination unit 340).

[0083] This embodiment includes a voltage output module, a load characteristic adaptive module, a fault detection module, and a fault handling module. The voltage output module outputs a voltage to be identified. The load characteristic adaptive module determines a critical voltage corresponding to the load to be used based on the actual operating resistance and rated operating voltage. A voltage-current characteristic curve is obtained using the current to be determined and the rated operating voltage corresponding to the load, and the critical voltage is determined based on the voltage-current characteristic curve. The fault detection module determines the fault type of the voltage output device based on the voltage to be identified and the critical voltage. The voltage output device includes at least one voltage output channel. By comparing the voltage values ​​of the voltage to be identified and the critical voltage, a voltage range corresponding to the voltage to be identified can be determined, and the fault type of the voltage output channel corresponding to the voltage to be identified can be determined based on the determined voltage range. The fault handling module retrieves a fault handling method corresponding to the fault type and performs corresponding fault handling on the voltage output module based on the fault handling method. This solves the problem of inaccurate fault detection of load drive devices, accurately identifies the fault type of the load drive device, and retrieves the corresponding fault handling method for timely fault handling.

[0084] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0085] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A fault handling device, characterized in that, include: The system includes a voltage output module, a load characteristic adaptive module, a fault detection module, and a fault handling module; among which, The voltage output module is used to output the voltage to be identified; The load characteristic adaptive module is used to determine the critical voltage corresponding to the load to be used based on the actual working resistance and rated working voltage corresponding to the load to be used; wherein, the critical voltage includes an upper critical voltage and a lower critical voltage. The fault detection module is used to determine the fault type corresponding to the voltage output device based on the voltage to be identified and the critical voltage; wherein the voltage output device includes at least one voltage output channel; The fault handling module is used to retrieve the fault handling method corresponding to the fault type, and perform corresponding fault handling on the voltage output module based on the fault handling method. The load characteristic adaptive module includes: The load parameter acquisition unit is used to input the actual working resistance and rated working voltage corresponding to the load to be used, which are acquired in real time, in at least one parameter editing control. The current determination unit is used to determine the current to be determined corresponding to the load to be used based on the ratio of the rated operating voltage to the actual operating resistance. A critical voltage determination unit is used to determine the critical voltage corresponding to the load to be used based on the current to be determined and the rated operating voltage. The critical voltage includes an upper critical voltage and a lower critical voltage, and the critical voltage determination unit includes: The characteristic curve determination subunit is used to construct a current-voltage characteristic curve corresponding to the load to be used based on the current to be determined and the actual working resistance; The critical voltage determination subunit is used to determine the upper critical voltage corresponding to the load to be used based on the maximum value of the current-voltage characteristic curve, and to determine the lower critical voltage corresponding to the load to be used based on the minimum value of the current-voltage characteristic curve.

2. The apparatus according to claim 1, characterized in that, The fault detection module includes: A switch state determination unit is used to obtain the first switch state of the high-side drive and the second switch state of the low-side drive of the voltage output channel. The channel type determination unit is used to determine the channel type of the voltage output channel based on the first switch state and the second switch state; The channel operating state determination unit is used to determine the channel operating state corresponding to the voltage output channel based on the voltage to be identified and the channel type; wherein, the channel operating state includes an on state or an off state; The fault determination unit is used to determine the fault type corresponding to the voltage output channel based on the channel's operating status.

3. The apparatus according to claim 2, characterized in that, The channel is in a high-side channel off state. The fault determination unit includes: The first high-side fault determination subunit is used to determine that the voltage output channel is in normal working mode if the voltage to be identified is less than the lower limit critical voltage. The second high-side fault determination subunit is used to determine the fault type of the voltage output channel as an open-circuit type if the voltage to be identified is greater than the lower threshold voltage and less than the upper threshold voltage. The third high-side fault determination subunit is used to determine that the fault type of the voltage output channel is a high-side short source type if the voltage to be identified is greater than the upper limit critical voltage.

4. The apparatus according to claim 2, characterized in that, The channel is in a low-side channel off state. The fault determination unit includes: The first low-side fault determination subunit is used to determine that the fault type of the voltage output channel is a low-side short-ground type if the voltage to be identified is less than the lower limit threshold voltage. The second low-side fault determination subunit is used to determine the fault type of the voltage output channel as an open-circuit type if the voltage to be identified is greater than the lower threshold voltage and less than the upper threshold voltage. The third low-side fault determination subunit is used to determine the fault type of the voltage output channel as normal operation if the voltage to be identified is greater than the upper limit threshold voltage.

5. The apparatus according to claim 2, characterized in that, The channel is in a high-side start-up state. The fault determination unit is used to determine that the fault type of the voltage output channel is a high-side short-to-ground type when the voltage to be identified is less than the lower limit critical voltage.

6. The apparatus according to claim 2, characterized in that, The channel is in a low-side start-up state. The fault determination unit is used to determine that the fault type of the voltage output channel is a low-side short source type when the voltage to be identified is greater than the upper limit critical voltage.

7. The apparatus according to claim 2, characterized in that, The channel is in a high-low side combined start-up state. The fault determination unit is used to determine that the fault type of the voltage output channel is an interphase overcurrent fault type when the voltage to be identified is greater than the overcurrent sampling voltage corresponding to the load to be used.

8. A fault handling method, characterized in that, include: Receive the voltage to be identified output from the voltage output channel; Based on the actual operating resistance and actual operating voltage corresponding to the load to be used, a critical voltage corresponding to the load to be used is determined; wherein, the critical voltage includes an upper critical voltage and a lower critical voltage. Based on the voltage to be identified and the critical voltage, determine the fault type corresponding to the voltage output device; Retrieve the fault handling method corresponding to the fault type, and perform corresponding fault handling on the voltage output device based on the fault handling method; The step of determining the critical voltage corresponding to the load to be used based on the actual operating resistance and actual operating voltage corresponding to the load to be used includes: In at least one parameter editing control, input the actual operating resistance and rated operating voltage corresponding to the load to be used, which are obtained in real time. Based on the ratio of the rated operating voltage to the actual operating resistance, determine the current to be determined corresponding to the load to be used; The critical voltage corresponding to the load to be used is determined based on the current to be determined and the rated operating voltage. The critical voltage corresponding to the load to be used is dynamically adjusted based on the current to be determined corresponding to the actual operating resistance of the load to be used. The step of determining the critical voltage corresponding to the load to be used based on the current to be determined and the rated operating voltage includes: Based on the current to be determined and the actual operating resistance, construct a current-voltage characteristic curve corresponding to the load to be used; The upper limit critical voltage corresponding to the load to be used is determined based on the maximum value of the current-voltage characteristic curve, and the lower limit critical voltage corresponding to the load to be used is determined based on the minimum value of the current-voltage characteristic curve.

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