Bus discharge control method, circuit, driver, and storage medium

Abstract

The application discloses a bus discharge control method and circuit, a driver and a storage medium, and relates to the technical field of bus discharge. The method comprises the following steps: acquiring a voltage value of a bus, and matching a voltage grade corresponding to the voltage value; according to the voltage grade, matching a corresponding preset switching speed; wherein the preset switching speed comprises the switching speed of a plurality of switching devices connected with a load; according to the preset switching speed, controlling the plurality of switching devices to conduct in a preset order, so that the load rotates; and the load rotation is used for consuming the electric charge in the bus. The application solves the problem that the bus discharge control in the prior art is not accurate enough, which leads to the problem that the complete release of the bus voltage cannot be guaranteed, and realizes the effect of accurately controlling the complete release of the bus voltage without increasing the cost of equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bus discharge, and in particular to a bus discharge control method, circuit, driver and storage medium. BACKGROUND

[0002] In a driver of an electrical appliance, especially a driver supporting both DC voltage input and mains voltage input, when the control device is powered off, the bus voltage will continue for a period of time before being completely discharged. In order to ensure the safety of users, the bus needs to be quickly discharged.

[0003] However, the existing bus discharge method still has some problems, such as the need to additionally increase a discharge circuit, resulting in increased device cost; and the discharge control is not accurate enough, resulting in the bus voltage not being completely released after the discharge time is reached. SUMMARY

[0004] The main purpose of the present application is to provide a bus discharge control method, circuit, driver and storage medium, which aims to solve the technical problem of inaccurate bus discharge control in the prior art, which cannot guarantee complete release of the bus voltage.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a bus discharge control method, which comprises:

[0007] obtaining a voltage value of a bus and matching a voltage level corresponding to the voltage value;

[0008] matching a corresponding preset switching speed according to the voltage level; wherein the preset switching speed includes the switching speed of a plurality of switching devices connected to a load;

[0009] controlling the plurality of switching devices to conduct in a preset order according to the preset switching speed, so that the load rotates; the load rotation is used to consume the charge in the bus.

[0010] Optionally, in the above bus discharge control method, before the step of obtaining the voltage value of the bus and matching the voltage level corresponding to the voltage value, the method further comprises:

[0011] obtaining a shutdown instruction issued by an upper computer;

[0012] determining whether a quick discharge start condition is met; wherein the quick discharge start condition includes that the device relay is disconnected and the bus voltage is not lower than a preset voltage;

[0013] If the fast discharge start condition is met, the step of acquiring the voltage value of the bus and matching the voltage level corresponding to the voltage value and the subsequent steps are performed.

[0014] Optionally, in the bus discharge control method, the plurality of switching devices includes six switches, and the preset switching speed includes switching speeds of the six switches connected with the load.

[0015] The step of controlling the plurality of switching devices to be turned on in a preset order according to the preset switching speed includes:

[0016] The six switches are controlled to be turned on in a preset order according to the preset switching speed.

[0017] Optionally, in the bus discharge control method, the first switch assembly, the second switch assembly and the third switch assembly are connected in parallel and are respectively connected with the load in single phase; the first switch assembly includes a first switch and a fourth switch connected in series, the second switch assembly includes a second switch and a fifth switch connected in series, and the third switch assembly includes a third switch and a sixth switch connected in series.

[0018] The step of controlling the six switches to be turned on in a preset order according to the preset switching speed includes:

[0019] According to the preset switching speed, the first switch and the fifth switch are controlled to be turned on first, then the second switch and the sixth switch are controlled to be turned on, and finally the third switch and the fourth switch are controlled to be turned on; or,

[0020] According to the preset switching speed, the first switch and the sixth switch are controlled to be turned on first, then the second switch and the fourth switch are controlled to be turned on, and finally the third switch and the fifth switch are controlled to be turned on.

[0021] In a second aspect, the present application provides a bus discharge circuit, which includes a bus, a switching device and a load connected in sequence, and a controller connected with the switching device; wherein,

[0022] The bus includes a bus capacitor for releasing the charge stored in itself.

[0023] The switching device is used for being turned on or turned off in response to the control of the controller.

[0024] The load is used for consuming the charge in the bus capacitor by itself rotation when the switching device is turned on.

[0025] The controller is used for implementing the bus discharge control method as described above.

[0026] Optionally, in the above-described bus discharge circuit, the switching device includes six switches connected to the load; wherein,

[0027] The first switch assembly, the second switch assembly, and the third switch assembly are connected in parallel and are each connected to the load in a single phase. The first switch assembly includes a first switch and a second switch connected in series, the second switch assembly includes a second switch and a fifth switch connected in series, and the third switch assembly includes a third switch and a sixth switch connected in series.

[0028] Optionally, in the above-mentioned bus discharge circuit, the switching device further includes a seventh switch connected to the bus capacitor, and the seventh switch is connected in parallel across the bus capacitor;

[0029] The seventh switch is used as a braking circuit to provide a discharge circuit for the bus capacitor.

[0030] Optionally, in the above-mentioned bus discharge circuit, the controller is powered by an independent low-voltage power supply or by the bus capacitor.

[0031] Thirdly, the present invention provides a driver that includes the bus discharge circuit described above.

[0032] Fourthly, the present invention provides a computer-readable storage medium storing a bus discharge control program, which can be executed by one or more processors to implement the bus discharge control method as described above.

[0033] The above-described one or more technical solutions provided by this invention can have the following advantages or at least achieve the following technical effects:

[0034] This invention proposes a bus discharge control method, circuit, driver, and storage medium. By acquiring the bus voltage level and matching it with a corresponding preset switching speed, it controls several switching devices connected to the load to conduct sequentially in a preset order, causing the load to rotate and consuming the charge in the bus, thereby achieving the purpose of completely releasing the bus voltage. This invention can control the switching speed of the switching devices according to the voltage level, thereby controlling the discharge speed of the bus voltage with precise control and adaptability to different bus voltage values. This invention does not require the addition of an extra discharge circuit; the bus discharge circuit of this invention can be directly extended to the load drive circuit of the driver. This invention achieves the effect of precisely controlling the complete release of the bus voltage without increasing equipment costs. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0036] Figure 1 This is a flowchart illustrating the first embodiment of the bus discharge control method of the present invention;

[0037] Figure 2 This is a connection diagram of the bus discharge circuit involved in the present invention;

[0038] Figure 3 This is a flowchart illustrating the second embodiment of the bus discharge control method of the present invention.

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0041] It should be noted that in this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element. Furthermore, in this invention, unless otherwise expressly specified and limited, the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements.

[0042] In this invention, descriptions involving terms such as "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0043] Analysis of existing technologies reveals that some drives used in various electrical devices, especially those requiring simultaneous support for both DC and AC voltage inputs (such as the drive in an air conditioner in a refrigerated truck), exhibit a significant safety risk when the control device is powered off, as the drive's bus voltage remains low for a considerable period before fully discharging. Therefore, while different discharge time requirements are set for different devices, rapid bus voltage discharge remains a consistent goal to ensure user safety.

[0044] Currently, there are two main methods for discharging the busbar. One method is to discharge a single load. The problem with this method is that it requires an additional discharge circuit, which increases equipment costs. The other method is to set a fixed discharge time and perform the discharge action within that time. Once the discharge time is up, the discharge action stops. The problem with this method is that when the voltage is too high, it cannot be guaranteed that the busbar voltage will be fully released within that discharge time. In other words, the discharge control is not precise enough, resulting in the busbar voltage not being fully released after the discharge time is up.

[0045] In view of the technical problem that the bus discharge control in the prior art is not precise enough, resulting in the inability to guarantee the complete release of bus voltage, the present invention provides a bus discharge control method, the overall idea of ​​which is as follows:

[0046] Obtain the voltage value of the bus and match the voltage level corresponding to the voltage value; match the corresponding preset switching speed according to the voltage level; wherein, the preset switching speed includes the switching speed of a plurality of switching devices connected to the load; according to the preset switching speed, control the plurality of switching devices to turn on sequentially in a preset order, so as to make the load rotate, so as to consume the charge in the bus capacitor by the rotation of the load; when the voltage value is detected to drop to zero, control the plurality of switching devices to turn off.

[0047] The above technical solution achieves the goal of completely releasing the bus voltage. The switching speed of the switching devices can be controlled according to the voltage level, thereby controlling the discharge rate of the bus voltage. This precise control is applicable to different bus voltage values. Furthermore, no additional discharge circuit is required; the bus discharge circuit of this invention can be directly extended onto the load drive circuit of the driver. This achieves the effect of precisely controlling the complete release of the bus voltage without increasing equipment costs.

[0048] Example 1

[0049] Reference Figure 1 The flowchart illustrates the first embodiment of the bus discharge control method of the present invention, which can be applied to the bus discharge circuit in a driver.

[0050] like Figure 2 The diagram shows a connection schematic of a bus discharge circuit. The circuit includes a bus, switching devices, and a load connected in sequence, as well as a controller connected to the switching devices; wherein,

[0051] The busbar includes a busbar capacitor for releasing the charge it stores;

[0052] The switching device is used to turn on or off in response to the control of the controller;

[0053] The load is used to consume the charge in the bus capacitor by utilizing its own rotational inertia when the switching device is turned on.

[0054] The controller is used to perform the following operations:

[0055] Obtain the voltage value of the bus and match the voltage level corresponding to the voltage value;

[0056] According to the voltage level, a corresponding preset switching speed is matched; wherein, the preset switching speed includes the switching speed of a plurality of switching devices connected to the load;

[0057] According to the preset switching speed, the plurality of switching devices are controlled to be turned on sequentially in a preset order, causing the load to rotate; the rotation of the load is used to consume the charge in the bus.

[0058] Based on the above bus discharge circuit, the following is combined with Figure 1 The flowchart shown illustrates the bus discharge control method of this embodiment in detail. The method may include the following steps:

[0059] Step S20: Obtain the voltage value of the bus and match the voltage level corresponding to the voltage value.

[0060] In practical implementation, the main energy storage element of the busbar is the busbar capacitor. If resistive elements are used for discharge, the higher the busbar voltage, the longer the discharge time will be, which makes it impossible to achieve the purpose of rapid discharge. Figure 2 In the circuit shown in this embodiment, the motor windings provide three discharge paths. The controller detects the voltage across the bus capacitor using a voltage detection circuit or a detection resistor to obtain the bus voltage value. Then, according to a preset voltage level classification rule, it matches the voltage level to which the voltage value belongs to obtain the bus voltage level. The controller is powered by a separate low-voltage power supply or by the bus capacitor.

[0061] Step S40: Match the corresponding preset switching speed according to the voltage level; wherein, the preset switching speed includes the switching speed of several switching devices connected to the load.

[0062] Specifically, different switching speeds can be set for different voltage levels to ensure a constant discharge time, guaranteeing that the bus voltage in bus capacitors of different voltage values ​​can be completely released within the same discharge time. Only the switching speed of the switching device connected to the load needs to be set; other switching devices in the circuit, such as those providing a discharge circuit to the bus capacitor, do not need to have their switching speeds set according to the voltage level.

[0063] In practice, the controller obtains the switching speed of several switches connected to the load based on the bus voltage level.

[0064] Step S60: According to the preset switching speed, control the plurality of switching devices to be turned on in a preset order to make the load rotate; the rotation of the load is used to consume the charge in the bus.

[0065] Specifically, the plurality of switching devices includes six switches, and the preset switching speed includes the switching speed of the six switches connected to the load; step S60 may include:

[0066] Step S61: According to the preset switching speed, control the six switches to be turned on in a preset order to make the load rotate.

[0067] More specifically, the six switches connected to the load include a first switch assembly, a second switch assembly, and a third switch assembly; the first switch assembly, the second switch assembly, and the third switch assembly are connected in parallel and each is connected to a single phase of the load; wherein,

[0068] The first switch assembly includes a first switch and a fourth switch connected in series; the second switch assembly includes a second switch and a fifth switch connected in series; and the third switch assembly includes a third switch and a sixth switch connected in series. Step S61 may include:

[0069] Step S61.1: According to the preset switching speed, first control the first switch and the fifth switch to be turned on, then control the second switch and the sixth switch to be turned on, and finally control the third switch and the fourth switch to be turned on; or,

[0070] Step S61.2: According to the preset switching speed, first control the first switch and the sixth switch to be turned on, then control the second switch and the fourth switch to be turned on, and finally control the third switch and the fifth switch to be turned on.

[0071] Specifically, the preset sequence is set by the user based on the standard that two switches in series do not conduct simultaneously. Taking the circuit of this embodiment as an example, as long as the first and fourth switches, the second and fifth switches, and the third and sixth switches in series do not conduct simultaneously, that is, as long as the two switches in series do not conduct simultaneously, the preset sequence can be set according to the actual situation; for example, in this embodiment, the first and fifth switches can be controlled to conduct first, then the second and sixth switches can be controlled to conduct, and finally the third and fourth switches can be controlled to conduct; alternatively, the first and sixth switches can be controlled to conduct first, then the second and fourth switches can be controlled to conduct, and finally the third and fifth switches can be controlled to conduct.

[0072] In a specific implementation, after the controller obtains the switching speeds of several switches connected to the load, in this embodiment, after obtaining the switching speeds of the above six switches, namely the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch, it can control these switches to be turned on in a preset order, so that the load works and the load works to consume the charge in the bus capacitor. In this embodiment, the motor is made to rotate at a higher speed, so as to consume the charge in the bus capacitor by using the inertia of the motor.

[0073] Furthermore, the method may also include:

[0074] Step S80: When the voltage value is detected to drop to zero, control the plurality of switching devices to turn off.

[0075] Specifically, when the detected bus voltage drops to zero, it indicates that the bus voltage has been completely released. At this time, the controller controls the switching devices connected to the load to turn off, that is, controls the first switch, the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch to turn off. They can all be turned off at the same time, and the bus discharge ends.

[0076] The bus discharge control method provided in this embodiment obtains the bus voltage level, matches it with a corresponding preset switching speed, and controls several switching devices connected to the load to conduct sequentially in a preset order, causing the load to rotate and consume the charge in the bus, thereby achieving the purpose of completely releasing the bus voltage. This invention can control the switching speed of the switching devices according to the voltage level, thus controlling the discharge speed of the bus voltage. The control is precise and applicable to different bus voltage requirements. This invention achieves the effect of precisely controlling the complete release of the bus voltage without increasing equipment costs.

[0077] Example 2

[0078] Based on the same inventive concept, referring to Figure 3 A second embodiment of the bus discharge control method of the present invention is proposed, which is applied to, for example... Figure 2 The bus discharge circuit shown.

[0079] The following is combined with Figure 3 The flowchart shown illustrates the bus discharge control method of this embodiment in detail. The method may include the following steps:

[0080] Step S11: Obtain the shutdown command issued by the host computer.

[0081] Specifically, the host computer is the control panel of the electrical equipment where the bus discharge circuit is located, or the control circuit connected to the circuit. The user controls the equipment to shut down on the host computer, and the controller receives the shutdown command issued by the host computer.

[0082] Step S12: Determine whether the rapid discharge start-up conditions are met; wherein, the rapid discharge start-up conditions include the equipment relay being disconnected and the bus voltage not being lower than the preset voltage.

[0083] Specifically, when the controller receives a shutdown command, the equipment relay disconnects. At this time, the bus capacitor still stores electrical charge, and the bus voltage is not lower than the preset voltage. Therefore, the bus capacitor can be discharged using the method of this embodiment. The preset voltage can be a preset percentage of the rated bus voltage. For example, in this embodiment, the preset voltage is 10% of the rated bus voltage.

[0084] In practice, the controller determines whether the device meets the fast discharge start-up conditions at the current moment, specifically whether the device relay is open and whether the bus voltage is lower than the preset voltage. If the device relay is open, it indicates a successful response to the shutdown command; if the device relay is not open, it indicates a shutdown failure, and the fast discharge function does not need to be activated. If the bus voltage is not lower than the preset voltage, it indicates that the bus capacitor still stores charge; if the bus voltage is lower than the preset voltage, it indicates that the bus capacitor does not store charge, and therefore, discharge is not required. Therefore, if the device relay is open and the bus voltage is not lower than the preset voltage, the fast discharge start-up conditions are met; if the device relay is not open or the bus voltage is lower than the preset voltage, the fast discharge start-up conditions are not met.

[0085] Step S13: If the rapid discharge start-up condition is met, then execute the steps of obtaining the bus voltage value and matching the voltage level corresponding to the voltage value, as well as subsequent steps.

[0086] Specifically, if the conditions for rapid discharge start are met, steps S20 to S80 are executed; if the conditions for rapid discharge start are not met, the process returns to step S11 and continues to obtain the shutdown command issued by the host computer.

[0087] Step S20: Obtain the voltage value of the bus and match the voltage level corresponding to the voltage value.

[0088] Step S30: According to the voltage level classification rules, set the switching speed corresponding to each voltage level to obtain the preset switching speed; wherein, the higher the voltage level, the faster the switching speed.

[0089] In the specific implementation process, different voltage levels can be divided according to different voltage values, and the switching speed of the corresponding switching devices can be set for each voltage level. For example, a faster switching speed can be set for high voltage levels, and a slower switching speed can be set for low voltage levels, so as to obtain the preset switching speed, that is, the switching speed of several switching devices connected to the load, thereby ensuring that the voltage capacitor is completely discharged within the same discharge time.

[0090] Step S40: Match the corresponding preset switching speed according to the voltage level; wherein, the preset switching speed includes the switching speed of several switching devices connected to the load.

[0091] Step S60: According to the preset switching speed, control the plurality of switching devices to be turned on in a preset order to make the load rotate, so as to consume the charge in the bus capacitor by rotating the load.

[0092] Step S80: When the voltage value is detected to drop to zero, control the plurality of switching devices to turn off.

[0093] For more details on the specific implementation of the above method steps, please refer to the description of the specific implementation in Example 1. For the sake of brevity, these details will not be repeated here.

[0094] The bus discharge control method provided in this embodiment activates the fast discharge function only after the fast discharge start-up conditions are met. The controller discharges the bus voltage to the bus capacitor. The bus voltage is rapidly reduced by controlling the switching speed of the main circuit switching devices after the relay is turned off. This method accurately controls the bus voltage discharge and has the advantages of low cost and precise control. It can meet the discharge requirements of bus capacitors of various voltage levels.

[0095] Example 3

[0096] Based on the same inventive concept, referring to Figure 2 The first embodiment of the bus discharge circuit of the present invention is presented below, in conjunction with... Figure 2 The circuit connection diagram shown illustrates the bus discharge circuit provided in this embodiment in detail. This circuit is used in a driver and may include:

[0097] A busbar, a switching device, and a load are connected in sequence, along with a controller connected to the switching device; wherein the busbar includes a busbar capacitor for releasing its stored charge;

[0098] The switching device is used to turn on or off in response to the control of the controller;

[0099] The load is used to dissipate the charge in the bus capacitor by rotating itself when the switching device is turned on.

[0100] The controller is used to implement all or part of the steps of the various embodiments of the bus discharge control method of the present invention.

[0101] Specifically, the switching device includes six switches connected to the load; wherein,

[0102] The first switch assembly, the second switch assembly, and the third switch assembly are connected in parallel and are each connected to the load in a single phase. The first switch assembly includes a first switch and a second switch connected in series, the second switch assembly includes a second switch and a fifth switch connected in series, and the third switch assembly includes a third switch and a sixth switch connected in series.

[0103] Specifically, the switching device further includes a seventh switch connected to the bus capacitor, the seventh switch being connected in parallel across the bus capacitor;

[0104] The seventh switch is used as a braking circuit to provide a discharge circuit for the bus capacitor.

[0105] In this embodiment, a discharge circuit can be provided for the bus capacitor through the motor load, or the seventh switch can be used as a braking circuit to provide a discharge circuit for the bus capacitor.

[0106] Specifically, the load can be a motor. When the controller controls the six switches to be turned on in a preset order according to the preset switching speed, the motor rotates and the inertia of the motor rotation can consume the charge in the bus capacitor. The conducting state continues until the bus voltage drops to zero.

[0107] Specifically, the controller is powered by an independent low-voltage power supply or by the bus capacitor.

[0108] In specific implementation, if the controller already has an independent low-voltage power supply, then the independent low-voltage power supply can be used directly to supply power, and the 12V working voltage can be input to the controller to enable the controller to perform the above-mentioned method. If there is no independent low-voltage power supply, after the equipment relay is disconnected, since the bus capacitor still stores electricity, the bus capacitor can be used directly to supply power to the controller, and the working voltage can be input to the controller to enable the controller to perform the above-mentioned method. For example, in this embodiment, by detecting the voltage level of the bus, the switching speed of the above-mentioned switching device is determined, so that the motor rotates at a higher speed to consume the charge in the bus capacitor by using the inertia of the motor.

[0109] Specifically, the controller may be an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a microcontroller, a microprocessor, or other electronic components, used to execute all or part of the steps of the various embodiments of the bus discharge control method described above.

[0110] The bus discharge circuit in this embodiment does not require an additional discharge circuit and can be directly extended from the load drive circuit of the driver in the electrical equipment; it achieves the effect of precisely controlling the complete release of the bus voltage without increasing equipment costs.

[0111] It should be noted that the functions and corresponding technical effects of each device in the bus discharge circuit provided in this embodiment can be referred to the description of the specific implementation methods in the various embodiments of the bus discharge control method of the present invention. For the sake of brevity, they will not be repeated here.

[0112] Example 4

[0113] Based on the same inventive concept, this embodiment provides a driver, which may include:

[0114] Bus discharge circuit.

[0115] Specifically, the driver can be a device that drives and controls a motor load, such as a refrigerator driver or an air conditioner driver.

[0116] The specific connection relationship and function of the bus discharge circuit are as described in Embodiment 3 above. Since this embodiment adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0117] Example 5

[0118] Based on the same inventive concept, this embodiment provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, optical disk, etc. The storage medium stores a bus discharge control program, which can be executed by one or more processors. When the bus discharge control program is executed by the processor, it can implement all or part of the steps of various embodiments of the bus discharge control method of the present invention.

[0119] It should be noted that the sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0120] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct or indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A bus discharge control method, characterized in that, The method includes: Obtain the shutdown command issued by the host computer; Determine whether the rapid discharge start-up conditions are met; wherein, the rapid discharge start-up conditions include the equipment relay being disconnected and the bus voltage not being lower than a preset voltage; If the rapid discharge start-up conditions are met, the bus voltage value is obtained and matched with the voltage level corresponding to the voltage value. According to the voltage level, a corresponding preset switching speed is matched; wherein, the preset switching speed includes the switching speed of a plurality of switching devices connected to the load, and the preset switching speed is positively correlated with the voltage level; According to the preset switching speed, the plurality of switching devices are controlled to be turned on sequentially in a preset order, causing the load to rotate; the rotation of the load is used to consume the charge in the busbar by utilizing its own rotational inertia, so as to realize the busbar discharge; the speed of the busbar discharge is positively correlated with the preset switching speed. When the voltage value is detected to drop to zero, the plurality of switching devices are controlled to turn off.

2. The bus discharge control method as described in claim 1, characterized in that, The plurality of switching devices includes six switches, and the preset switching speed includes the switching speed of the six switches connected to the load; The step of controlling the plurality of switching devices to be turned on sequentially in a preset order according to the preset switching speed includes: According to the preset switching speed, the six switches are controlled to be turned on sequentially in a preset order.

3. The bus discharge control method as described in claim 2, characterized in that, The first switch assembly, the second switch assembly, and the third switch assembly are connected in parallel and are each connected to the load in a single phase; wherein, the first switch assembly includes a first switch and a fourth switch connected in series, the second switch assembly includes a second switch and a fifth switch connected in series, and the third switch assembly includes a third switch and a sixth switch connected in series. The step of controlling the six switches to be turned on sequentially in a preset order according to the preset switching speed includes: According to the preset switching speed, first control the first switch and the fifth switch to be turned on, then control the second switch and the sixth switch to be turned on, and finally control the third switch and the fourth switch to be turned on; or, According to the preset switching speed, firstly, the first switch and the sixth switch are turned on, then the second switch and the fourth switch are turned on, and finally the third switch and the fifth switch are turned on.

4. A bus discharge circuit, characterized in that, The circuit includes a busbar, a switching device, and a load connected in sequence, as well as a controller connected to the switching device; wherein, The busbar includes a busbar capacitor for releasing the charge it stores; The switching device is used to turn on or off in response to the control of the controller; The load is used to dissipate the charge in the bus capacitor by rotating itself when the switching device is turned on. The controller is used to implement the bus discharge control method as described in any one of claims 1 to 3.

5. The bus discharge circuit as described in claim 4, characterized in that, The switching device includes six switches connected to the load; wherein... The first switch assembly, the second switch assembly, and the third switch assembly are connected in parallel and are each connected to the load in a single phase. The first switch assembly includes a first switch and a fourth switch connected in series, the second switch assembly includes a second switch and a fifth switch connected in series, and the third switch assembly includes a third switch and a sixth switch connected in series.

6. The bus discharge circuit as described in claim 5, characterized in that, The switching device further includes a seventh switch connected to the bus capacitor, the seventh switch being connected in parallel across the bus capacitor; The seventh switch is used as a braking circuit to provide a discharge circuit for the bus capacitor.

7. The bus discharge circuit as described in claim 6, characterized in that, The controller is powered by an independent low-voltage power supply or by the bus capacitor.

8. A driver, characterized in that, The driver includes a bus discharge circuit as described in any one of claims 4 to 7.

9. A computer-readable storage medium, characterized in that, The storage medium stores a bus discharge control program, which can be executed by one or more processors to implement the bus discharge control method as described in any one of claims 1 to 3.

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