CN116154936A - Motor controller and power supply circuit and power supply method thereof - Google Patents

Motor controller and power supply circuit and power supply method thereof Download PDF

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Publication number
CN116154936A
CN116154936A CN202310195776.2A CN202310195776A CN116154936A CN 116154936 A CN116154936 A CN 116154936A CN 202310195776 A CN202310195776 A CN 202310195776A CN 116154936 A CN116154936 A CN 116154936A
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China
Prior art keywords
power supply
power
circuit
supply path
taking
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Pending
Application number
CN202310195776.2A
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Chinese (zh)
Inventor
余浩
靳彦红
杜恩利
陈文杰
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Hefei Yangguang Electric Power Technology Co ltd
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Hefei Yangguang Electric Power Technology Co ltd
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Priority to CN202310195776.2A priority Critical patent/CN116154936A/en
Publication of CN116154936A publication Critical patent/CN116154936A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H02H11/003—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The application provides a motor controller, a power supply circuit and a power supply method thereof. In the power supply method of the motor controller, since the unstable power taking of the power supply path usually occurs before the abnormal power taking of the power supply path, the emergency power supply is already integrated into the power supply path when the abnormal power taking of the power supply path occurs, so that the emergency power supply can immediately supply power to the internal power utilization circuit when the abnormal power taking of the power supply path occurs, the power supply method can avoid the condition that the internal power utilization circuit is temporarily powered off, and further the power supply timeliness of the emergency power supply can be ensured. In addition, since the emergency power supply is incorporated into the power supply path when the power supply of the power supply path is unstable, the power supply method can maintain the stable power supply of the internal power utilization circuit, and thus can avoid affecting the normal operation of the internal power utilization circuit.

Description

Motor controller and power supply circuit and power supply method thereof
Technical Field
The invention relates to the technical field of power electronics, in particular to a motor controller, a power supply circuit and a power supply method thereof.
Background
At present, the new energy automobile market gradually requires a motor controller to have functional safety and meet the corresponding grade requirements; under the premise, the input end of the low-voltage power supply in the motor controller can be powered from the storage battery of the whole vehicle or from the emergency power supply; when the storage battery of the whole vehicle is abnormal, the low-voltage power supply takes power from the emergency power supply so as to ensure the normal power supply of the motor controller, namely, ensure the normal output of the motor controller.
However, in practical application, a certain time is required for starting the emergency power supply, that is, the emergency power supply cannot be started immediately, so that a vacuum period may occur in power supply of the emergency power supply, and thus, a situation that a corresponding device in the motor controller is powered off briefly, that is, the operation is stopped within a certain time, may occur.
Therefore, how to ensure the power supply timeliness of the emergency power supply is a technical problem to be solved.
Disclosure of Invention
In view of the above, the invention provides a motor controller, a power supply circuit and a power supply method thereof, so as to ensure the power supply timeliness of an emergency power supply.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
in one aspect, the present application provides a power supply method of a motor controller, including:
judging whether power taking of a power supply path of an internal power circuit in the motor controller is stable or not;
if the power supply of the power supply path is unstable, enabling an emergency power supply in the motor controller to be integrated into the power supply path of the internal power utilization circuit; the power taking position of the emergency power supply is different from the power taking position of the power supply path.
Optionally, determining whether the power taking of the power supply path of the internal power circuit in the motor controller is stable includes:
judging whether the power-taking voltage of the power supply path exceeds a preset range in a preset time;
if the power-taking voltage exceeds the preset range in the preset time, judging that the power-taking of the power supply path is unstable;
and if the power-taking voltage does not exceed the preset range within the preset time, judging that the power-taking of the power supply path is stable.
Optionally, the preset time is a unit time.
Optionally, after the emergency power supply in the motor controller is integrated into the power supply path of the internal power utilization circuit, the method further includes:
judging whether the power supply of the power supply path is abnormal;
and if the power taking of the power supply path is not abnormal, cutting the emergency power supply from the power supply path.
Optionally, determining whether the power supply path is abnormal includes:
judging whether the power-taking voltage of the power supply path is smaller than a first preset value or not;
if the power-taking voltage is smaller than the first preset value, the power-taking of the power supply path is abnormal;
and if the power-taking voltage is larger than or equal to the first preset value, judging that the power-taking of the power supply path is not abnormal.
Optionally, if the power supply path includes an anti-reverse circuit disposed between a power taking end of the power supply path and an integration point of the emergency power supply, the anti-reverse circuit is configured to suppress reverse current on the power supply path, and when it is determined that the power taking of the power supply path is abnormal, the following steps are executed:
judging whether the motor controller needs to discharge outwards through a power taking end of the power supply path;
and if the motor controller needs to discharge outwards through the power taking end of the power supply path, the reverse connection preventing circuit is short-circuited.
Optionally, the method further comprises:
judging whether the output of the emergency power supply is abnormal or not;
and if the output of the emergency power supply is abnormal, reporting the abnormal output to a whole vehicle controller of a whole vehicle system where the motor controller is located.
Optionally, determining whether the output of the emergency power supply is abnormal includes:
judging whether the output voltage of the emergency power supply is smaller than a second preset value or not;
if the output voltage of the emergency power supply is smaller than the second preset value, judging that the output of the emergency power supply is abnormal;
and if the output voltage of the emergency power supply is greater than or equal to the second preset value, judging that the output of the emergency power supply is not abnormal.
A second aspect of the present application provides a power supply circuit of a motor controller, comprising: the power supply circuit comprises an emergency power supply, a first detection circuit, a first on-off control circuit and an internal power utilization circuit of the motor controller; wherein:
the emergency power supply is integrated into the power supply path through the first on-off control circuit;
the first detection circuit is connected with a controller in the motor controller and is used for detecting the electricity taking parameter of the power supply path;
the first on-off control circuit is controlled by the controller, and the controller is used for executing the power supply method according to any one of the aspects.
Optionally, the power supply path includes: a low voltage power supply; wherein:
the input end of the low-voltage power supply is used as the input end of the power supply path, and the output end of the low-voltage power supply is connected with the power supply end of the internal power utilization circuit.
Optionally, the power supply path further includes: an anti-reverse connection circuit; wherein:
the input end of the low-voltage power supply is connected with the input end of the power supply path through the reverse connection preventing circuit;
the anti-reverse circuit is used for suppressing reverse current on the power supply path.
Optionally, the output end of the emergency power supply is connected with the input end of the low-voltage power supply; or alternatively, the process may be performed,
the output end of the emergency power supply is connected with the output end of the low-voltage power supply.
Optionally, if the power supply path includes: anti-reverse connection circuit, then power supply circuit still includes: a second on-off control circuit; wherein:
the second on-off control circuit is controlled by the controller; the second on-off control circuit is connected with the reverse connection preventing circuit in parallel.
Optionally, the first detection circuit is a first voltage detection circuit, and is configured to detect a power supply voltage of the power supply path.
Optionally, the method further comprises: a second detection circuit; wherein:
the second detection circuit is connected with the controller and used for detecting the output parameters of the emergency power supply.
Optionally, the second detection circuit is a second voltage detection circuit, and is configured to detect an output voltage of the emergency power supply.
Optionally, the power supply path takes power from a storage battery in the whole vehicle system where the motor controller is located;
the emergency power supply takes electricity from a power battery in the whole vehicle system where the motor controller is located.
Optionally, the method further comprises: a buffer circuit; wherein:
the buffer circuit is connected with the power taking end of the power supply circuit in parallel.
Optionally, a switching device used in the on-off control circuit includes: relay, MOS transistor, triode or IGBT.
A third aspect of the present application provides a motor controller comprising: a power conversion circuit, a controller and a power supply circuit as described in any of the second aspects of the present application; wherein:
the direct current side of the power conversion circuit is connected with a power battery in a whole vehicle system where the motor controller is located, and the alternating current side of the power conversion circuit is used for supplying power to a corresponding motor in the whole vehicle system;
the internal power circuit of the motor controller comprises the controller.
According to the technical scheme, the application provides a power supply method of the motor controller. In the power supply method of the motor controller, since the unstable power taking of the power supply path usually occurs before the abnormal power taking of the power supply path, the emergency power supply is already integrated into the power supply path when the abnormal power taking of the power supply path occurs, so that the emergency power supply can immediately supply power to the internal power utilization circuit when the abnormal power taking of the power supply path occurs, the power supply method can avoid the condition that the internal power utilization circuit is temporarily powered off, and further the power supply timeliness of the emergency power supply can be ensured.
In addition, since the emergency power supply is incorporated into the power supply path when the power supply of the power supply path is unstable, the power supply method can maintain the stable power supply of the internal power utilization circuit, and thus can avoid affecting the normal operation of the internal power utilization circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 to fig. 7 are schematic flow diagrams of seven implementations of a power supply method of a motor controller according to an embodiment of the present application;
fig. 8 to 12 are schematic structural diagrams of five implementations of a motor controller according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In this application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In order to ensure the power supply timeliness of the emergency power supply, another embodiment of the present application provides a power supply method of a motor controller, and a specific flow of the power supply method is shown in fig. 1, and specifically includes the following steps:
s110, judging whether power taking of a power supply path of an internal circuit in the motor controller is stable.
If the power supply path is unstable, executing step S120; if the power supply path is stable, the process returns to step S110, or the power supply method is stopped (fig. 1 shows only an example in which the power supply method is stopped).
In a specific example, the internal power circuit includes: a controller in the motor controller, and a driving circuit of a power conversion circuit in the motor controller.
In practical applications, including but not limited to the above examples, the present application is not limited to the specific examples, and the application is protected by the following claims as the case may be.
The power supply path is used to convert the acquired power into the operating power of the internal power circuit, for example, to convert the output voltage of the self power taking device into the operating voltage of the internal power circuit.
In practical applications, when the power supply path is stable, the power supply of the internal power consumption circuit is also stable, and when the power supply path is unstable, the power supply of the internal power consumption circuit is also unstable.
It should be noted that, if the power supply method is stopped after the power supply path is powered on stably, the step S110 may be executed periodically or the step S110 may be executed continuously, which is not limited herein, and may be within the scope of protection of the present application as the case may be.
S120, enabling an emergency power supply in the motor controller to be integrated into a power supply path of the internal power utilization circuit.
The power taking position of the emergency power supply is different from that of the power supply path.
In a specific example, the power supply path takes power from a storage battery in the whole vehicle system where the motor controller is located, and the emergency power supply takes power from a power battery in the whole vehicle system where the motor controller is located.
In practical applications, including but not limited to the above examples, the present application is not limited to the specific examples, and the application is protected by the following claims as the case may be.
In the present application, the above emergency power supply is incorporated into the above power supply path, specifically referring to: and starting the emergency power supply and connecting the emergency power supply with the power supply path in parallel, namely, at the moment, the power supply path and the emergency power supply power to the internal power utilization circuit together.
Because the unstable power taking of the power supply path usually occurs before the abnormal power taking of the power supply path, the emergency power supply is already integrated into the power supply path when the abnormal power taking of the power supply path occurs, so that the emergency power supply can immediately supply power to the internal power utilization circuit when the abnormal power taking of the power supply path occurs, the power supply method can avoid the condition that the internal power utilization circuit is temporarily powered off, namely, the power supply timeliness of the emergency power supply can be ensured, and further, the whole vehicle system where the motor controller is located can complete emergency treatment action when the abnormal power supplying of the power supply path occurs, and damage to the whole vehicle system due to parking can be avoided.
In addition, the emergency power supply is integrated into the power supply path when the power supply of the power supply path is unstable, so the power supply method can ensure that the power supply of the power supply path is stable; and when the power supply path is stable in power taking, the power supply of the internal power utilization circuit is stable, so that the power supply method also stabilizes the power supply of the internal power utilization circuit, and the influence on the normal operation of the internal power utilization circuit when the power supply path is unstable in power taking is avoided.
Another embodiment of the present application provides a specific implementation of step S110, and a specific flow thereof may refer to fig. 2, specifically including the following steps:
s210, judging whether the power-taking voltage of the power supply path exceeds a preset range within a preset time.
If the power-taking voltage of the power supply path exceeds the preset range within the preset time, step S220 is executed; if the power-taking voltage of the power supply path does not exceed the preset range within the preset time, step S230 is performed.
The preset range is the maximum variation range of the power-taking voltage in the preset time when the power supply stability of the internal power utilization circuit is ensured; the preset time and the preset range are generally determined according to the actual running result of the motor controller simulated by the simulation experiment, and in practical application, the preset time is preferably unit time.
S220, judging that the power supply path is unstable in power supply.
S230, judging that the power supply path is stable in power supply.
The foregoing is only one specific embodiment of step S110, and in practical applications, including but not limited to this, the present invention is not limited thereto, and the present invention is applicable to any case.
Another embodiment of the present application provides another embodiment of the power supply method of the motor controller, and a specific flow of this embodiment may be referred to fig. 3 (fig. 3 is only shown on the basis of fig. 2), which further includes the following steps after step S120 in the foregoing embodiment:
s310, judging whether the power supply path is abnormal in power supply.
If the power supply path is not abnormal, executing step S320; if the power supply path is abnormal, the process returns to step S110, or the power supply method is stopped (fig. 3 shows only an example in which the power supply method is stopped).
In practical applications, when the power supply path is powered normally, the internal power supply circuit is powered normally, and when the power supply path is powered abnormally, the internal power supply circuit is powered abnormally.
It should be noted that, if the power supply method is stopped after the power supply path is not abnormal, the step S110 may be periodically executed, or the step S110 may be continuously executed, which is not specifically limited herein, and may be within the scope of protection of the present application as the case may be.
Note that, after the power supply of the power supply path is not abnormal, and after the power supply of the internal power utilization circuit is kept stable, the same steps are performed, and step S110 is performed again, or the power supply method is stopped.
S320, cutting the emergency power supply from the power supply path.
In the present application, the emergency power supply is caused to cut out the power supply path, specifically: and disconnecting the communication between the emergency power supply and the power supply path, and turning off the emergency power supply, namely, only the power supply path supplies power to the internal power utilization circuit at the moment.
In this embodiment, as is known from the above, when the power supply path is not abnormal, even if the emergency power supply is not incorporated into the power supply path, the power supply of the internal power consumption circuit is normal, so when the power supply path is not abnormal, the emergency power supply is cut out from the power supply path, so that not only the normal power supply of the internal power consumption circuit can be ensured, but also the reduction in the life of the emergency power supply due to long-term load output can be avoided, and the possibility of occurrence of a fault in the emergency power supply is reduced.
Another embodiment of the present application provides another embodiment of a power supply method of a motor controller, which is applicable to the following cases: the power supply path comprises an anti-reverse connection circuit, and the anti-reverse connection circuit is arranged between the power taking end of the power supply path and the merging point of the emergency power supply and used for restraining reverse current on the power supply path.
The power-taking end of the power supply path refers to a port connected with a corresponding power-taking device on the power supply path; in practical application, the corresponding electricity taking device is also used for supplying power to other corresponding electricity using devices of the whole vehicle system where the motor controller is located.
The specific flow of this embodiment may be seen in fig. 4 (fig. 4 is only shown on the basis of fig. 3), and after the power supply path power taking abnormality is determined in the above embodiment, the method further includes the following steps:
s410, judging whether the motor controller needs to discharge through the power taking end of the power supply path.
If the motor controller needs to discharge the electricity through the electricity taking end of the power supply path, executing step S420; if the motor controller does not need to discharge the electricity through the electricity taking end of the electricity supply path, the step S110 is executed again, or the execution of the electricity supply method is stopped (fig. 3 shows only an example of stopping the execution of the electricity supply method).
The motor controller discharges outwards through the power taking end of the power supply path, which means that: the motor controller charges the corresponding power-taking device of the power supply path by utilizing the emergency power supply in the motor controller.
In a specific example, if it is determined that the whole vehicle controller in the whole vehicle system where the motor controller is located issues a corresponding command for discharging to the outside, it is determined that the motor controller needs to discharge to the outside through the power taking end of the power supply path.
In practical applications, including but not limited to the above embodiments, the present invention is not limited to the above embodiments, and may be applied to the protection scope of the present application as the case may be.
S420, short-circuiting the reverse connection preventing circuit.
In this embodiment, since the motor controller may charge the corresponding power-taking device of the power supply path by using the emergency power supply, the corresponding power-taking device of the power supply path may be prevented from overdischarging, thereby protecting the corresponding power-taking device of the power supply path.
In addition, because the corresponding electricity-taking device of the power supply path is also used for supplying power to other corresponding electricity-using devices in the whole vehicle system, the embodiment can also utilize the emergency power supply to supply power to the other corresponding electricity-using devices, namely, the motor controller has the function of supplying emergency power to the other corresponding electricity-using devices, so that the other corresponding electricity-using devices can also complete emergency treatment actions when the power supply of the power supply path is abnormal, and further the other corresponding electricity-using devices can be prevented from being damaged.
Another embodiment of the present application provides a specific implementation of step S210, where a specific flow may be referred to fig. 5 (fig. 5 is only shown on the basis of fig. 4), and specifically includes the following steps:
s510, judging whether the power-taking voltage of the power supply path is smaller than a first preset value.
If the power-taking voltage is smaller than the first preset value, step S520 is executed; if the power-up voltage is greater than or equal to the first preset value, step S530 is performed.
The first preset value is the lowest value of the power-taking voltage when the power supply of the internal power utilization circuit is ensured to be normal, and is usually determined according to the actual operation result of the simulation experiment simulation motor controller.
In addition, the power supply voltage of the power supply path refers to an output voltage of a power supply device of the power supply path, for example, an output voltage of a storage battery in a whole vehicle system where the motor controller is located.
S520, judging that the power supply path is abnormal in power supply.
S530, judging that the power supply path is not abnormal in power supply.
The foregoing is only one specific embodiment of step S210, and in practical applications, including but not limited to this, the present invention is not limited thereto, and the present invention is applicable to any situation.
Another embodiment of the present application provides another implementation of the power supply method of the motor controller, the specific flow of which is shown in fig. 6 (fig. 6 omits steps other than step S610 and step S620 for simplifying the view), and the implementation further includes the following steps:
s610, judging whether the output of the emergency power supply is abnormal.
If the output of the emergency power supply is abnormal, executing step S620; if the output of the emergency power supply is not abnormal, the process returns to step S610.
S620, reporting the information to a whole vehicle controller of a whole vehicle system where the motor controller is located.
In this embodiment, the output abnormality of the emergency power supply can be timely known and reported to the vehicle controller, so that a user can be timely reminded of overhauling the emergency power supply, and the influence on the motor controller is avoided.
The embodiment also provides a specific implementation manner of step S610, and the specific flow is shown in fig. 7, and specifically includes the following steps:
s710, judging whether the output voltage of the emergency power supply is smaller than a second preset value.
If the output voltage of the emergency power supply is smaller than the second preset value, step S720 is executed; if the output voltage of the emergency power supply is greater than or equal to the second preset value, step S730 is performed.
The second preset value is the lowest value of the output voltage of the emergency power supply when the power supply of the internal power utilization circuit is ensured to be normal, and is usually determined according to the actual operation result of the simulation experiment simulation motor controller.
S720, judging that the output of the emergency power supply is abnormal.
And S730, judging that the output of the emergency power supply is not abnormal.
The third preset value is the lowest voltage value when the emergency power supply outputs normally, so that whether the emergency power supply in the power supply circuit outputs abnormally can be judged by judging whether the output voltage of the emergency power supply is smaller than the third preset value.
Another embodiment of the present application provides a power supply circuit of a motor controller, with reference to fig. 8, specifically including: the motor controller comprises a power supply path 10 of an internal power utilization circuit of the motor controller, an emergency power supply 20, a first detection circuit 30 and a first on-off control circuit 40.
The connection relationship between the devices and the functions of the devices are specifically as follows:
as shown in fig. 8, the output terminal of the power supply path 10 is connected to a power supply terminal of an internal power circuit (the internal power circuit is not shown in fig. 8 for simplicity of view), the power supply terminal of the power supply path 10 is connected to the first power supply device 01, and the power supply path 10 is configured to convert the acquired power into the operating power of the internal power circuit, for example, to convert the output voltage of the power supply device into the operating voltage of the internal power circuit.
Optionally, the first electricity-taking device 01 may be a storage battery in the whole vehicle system where the motor controller is located; practical applications include, but are not limited to, the present application is not limited to, and the present application is also applicable to any case.
In a specific example, the power supply path 10 specifically includes a low-voltage power supply 11, and an input terminal of the low-voltage power supply 11 is used as a power taking terminal of the power supply path 10; the output end of the low-voltage power supply 11 is used as the output end of the power supply path 10 and is connected with the power supply end of the internal power utilization circuit; the power supply 11 converts the power obtained by the power supply path 10 into the power for operating the internal power circuit, for example, converts the output voltage of the power taking device into the power for operating the internal power circuit.
In another specific example, as shown in fig. 8, the power supply path 10 specifically includes a low-voltage power supply 11 and an anti-reverse circuit 12; the input end of the low-voltage power supply 11 is connected with the power taking end of the power supply path 10 through an anti-reverse connection circuit 12, and the anti-reverse connection circuit 12 is used for restraining reverse current on the power supply path 10; the output end of the low-voltage power supply 11 is used as the output end of the power supply path 10 and is connected with the power supply end of the internal power utilization circuit; the power supply path 10 is configured to obtain power from the power supply source 11, and the power supply path is configured to convert the power to the power for operation of the internal power circuit, for example, to convert the output voltage of the power taking device to the power for operation of the internal power circuit;
in practical applications, including but not limited to the two specific examples, the present application is not limited to the specific examples, and the specific examples are all within the protection scope of the present application as the case may be.
As shown in fig. 8, the emergency power supply 20 is integrated into the power supply path 10 through the first on-off control circuit 40, and the power taking end of the emergency power supply 20 is connected to the second power taking device 02, where the second power taking device 02 and the first power taking device 01 are different devices.
Alternatively, the second power taking device 02 may be a power battery in the whole vehicle system; practical applications include, but are not limited to, the present application is not limited to, and the present application is also applicable to any case.
Optionally, the first on-off control circuit 40 (shown in fig. 8 as only switching device 41) includes at least one switching device; if the number of the switching devices is equal to 1, two ends of the switching devices are respectively used as the positive electrode of the input end and the positive electrode of the output end of the first on-off control circuit 40, the negative electrode of the input end of the first on-off control circuit 40 is connected with the negative electrode of the output end of the first on-off control circuit 40, and the control end of the switching devices is used as the control end of the second on-off control circuit; if the number of the switching devices is greater than 1, all the switching devices are connected in series and parallel, two ends of a formed branch are respectively used as the positive electrode of the input end and the positive electrode of the output end of the first on-off control circuit 40, the negative electrode of the input end of the first on-off control circuit 40 is connected with the negative electrode of the output end of the first on-off control circuit 40, the control ends of all the switching devices are connected, and the connection point is used as the control end of the second on-off control circuit.
In practical applications, including but not limited to the above embodiments, the present invention is not limited to the above embodiments, and may be applied to the protection scope of the present application as the case may be.
Optionally, the switching device (only the switching tube M1 is used to show the switching device 41 in fig. 8) may be a relay, or may be a MOS tube, or may be a triode, or may be an IGBT, which includes but is not limited to this in practical application, and is not specifically limited herein, and may be within the protection scope of the present application as the case may be.
In a specific example, the power supply path 10 is any of the examples described above, and as shown in fig. 8, an output terminal of the emergency power supply 20 is connected to an input terminal of the low-voltage power supply 11.
In another specific example, the power supply path 10 is any of the examples described above, and the output terminal of the emergency power supply 20 is connected to the output terminal of the low-voltage power supply 11.
In practical applications, including but not limited to the above embodiments, the present invention is not limited to the above embodiments, and may be applied to the protection scope of the present application as the case may be.
As shown in fig. 8, the first detection circuit 30 is connected to the controller 100 in the motor controller, and is configured to detect the power taking parameter of the power supply path 10 and send the power taking parameter to the controller 100; in a specific example, as shown in fig. 8, the power supply path 10 includes a low voltage power supply 11 and an anti-reverse circuit 12, and the first detection circuit 30 is disposed between the power take-off end of the power supply path 10 and the first power take-off device 01; in practical applications, including but not limited to the above examples, the present application is not limited to the specific examples, and the application is protected by the following claims as the case may be.
Alternatively, the first detection circuit 30 may be a first voltage detection circuit, that is, configured to detect the power supply voltage of the power supply path 10; in practical applications, including but not limited to, the present application is not limited to, and can be applied to the protection scope of the present application as the case may be.
As shown in fig. 8, the first on-off control circuit 40 is controlled by the controller 100, and the controller 100 is configured to execute the power supply method of the motor controller according to the embodiment, specifically:
when it is determined that the power supply path 10 is unstable, the emergency power supply 20 is integrated into the power supply path 10 by placing the first on-off control circuit 40 in the on-state; when it is determined that the power supply path 10 is not abnormal, the emergency power supply 20 is cut out from the power supply path 10 by turning the first on/off control circuit 40 off.
In this embodiment, since the power supply method of the motor controller provided in the foregoing embodiment ensures the power supply timeliness of the foregoing emergency power supply 20, in the power supply circuit, the foregoing capacitor with a large capacity at the power supply end of the power supply path 10 may not be required, so that the space and cost of the power supply circuit may be saved.
Another embodiment of the present application provides a specific implementation of the anti-reverse connection circuit 12, and the specific structure thereof may be seen in fig. 9 (fig. 9 only illustrates an example of one diode Z), and specifically includes: at least one diode Z; the connection relationship between the devices is specifically as follows:
in a specific example, the number of the diodes Z is equal to 1, as shown in fig. 9, the anode of the diode Z is connected to the positive electrode of the first power taking device 01, the cathode of the diode Z is connected to the positive electrode of the input terminal of the low voltage power source 11, and the cathode of the first power taking device 01 is connected to the cathode of the input terminal of the low voltage power source 11.
In a specific example, the number of the diodes Z is equal to 1, the anode of the diode Z is connected to the cathode of the input terminal of the voltage source 11, the cathode of the diode Z is connected to the cathode of the first current-collecting device 01, and the anode of the first current-collecting device 01 is connected to the anode of the input terminal of the voltage source 11.
In a specific example, the number of the diodes Z is greater than 1, all the diodes Z are connected in parallel and in a same direction to form a connection branch, the anode of the connection branch is connected with the anode of the first current-collecting device 01, the cathode of the connection branch is connected with the anode of the first current-collecting device 01, and the cathode of the first current-collecting device 01 is connected with the cathode of the input end of the voltage source 11.
In a specific example, the number of the diodes Z is greater than 1, all the diodes Z are connected in parallel and in series in the same direction to form a connection branch, the anode of the connection branch is connected with the cathode of the input end of the low-voltage power supply 11, the cathode of the connection branch is connected with the cathode of the first power taking device 01, and the anode of the first power taking device 01 is connected with the anode of the input end of the low-voltage power supply 11.
The above-mentioned four embodiments of the reverse connection preventing circuit 12 are only examples, and in practical applications, including but not limited to, the present invention is not limited thereto, and the present invention is not limited thereto.
Another embodiment of the present application provides another embodiment of a power supply circuit of a motor controller, which is applicable to the case where the power supply path 10 includes the reverse connection preventing circuit 12; the specific structure is shown in fig. 10, and on the basis of the above embodiment, the method further comprises: a second on-off control circuit 50 (in fig. 10, only the switching device 51 is shown as an example, and only the switching device 51 is shown as the switching tube M2); the connection relation of the device is as follows:
the second on-off control circuit 50 is controlled by the controller 100, and the second on-off control circuit 50 is connected in parallel with the anti-reverse connection circuit 12, specifically:
when the motor controller needs to discharge the electricity through the electricity taking end of the power supply path 10, the second on-off control circuit 50 is in a conducting state, so that the reverse connection preventing circuit 12 is short-circuited.
It should be noted that, the second on-off control circuit 50 is the same as the embodiment of the first on-off control circuit 40, and will not be described herein again, and reference may be made to the above detailed description of the embodiment of the first on-off control circuit 40.
In this embodiment, since the emergency power supply 20 can be used to charge the corresponding power-taking device of the power supply path 10, the corresponding power-taking device of the power supply path 10 can be prevented from overdischarging, so as to protect the corresponding power-taking device of the power supply path 10.
In addition, since the corresponding power taking device of the power supply path 10 is further used for supplying power to other corresponding power consuming devices in the whole vehicle system, the present embodiment may further utilize the emergency power supply 20 to supply power to the other corresponding power consuming devices, that is, the motor controller has a function of providing emergency power for the other corresponding power consuming devices, so that the other corresponding power consuming devices may complete an emergency treatment action when the power supply of the power supply path 10 is abnormal, and further damage to the other corresponding power consuming devices may be avoided.
Another embodiment of the present application provides another specific embodiment of a power supply circuit of a motor controller, as shown in fig. 11, further including, based on the foregoing embodiment: a second detection circuit 60; the connection relation and specific functions of the device are as follows:
the second detection circuit 60 is connected to the controller 100, and is configured to detect an output parameter of the emergency power supply 20; in a specific example, the second detection circuit 60 is disposed between the emergency power supply 20 and the first on-off control circuit 40; in practical applications, including but not limited to the above examples, the present application is not limited to the specific examples, and the application is protected by the following claims as the case may be.
Alternatively, the second detecting circuit 60 may be a second voltage detecting circuit, i.e. configured to detect the output voltage of the emergency power supply 20; in practical applications, including but not limited to, the present application is not limited to, and can be applied to the protection scope of the present application as the case may be.
In this embodiment, the abnormal output of the emergency power supply 20 may be timely known and reported to the vehicle controller, so that a user may be timely reminded to overhaul the emergency power supply 20, thereby avoiding affecting the motor controller.
The embodiment of the present application further provides another specific embodiment of a power supply circuit of a motor controller, as shown in fig. 12, and further includes, based on the above embodiment: buffer circuit 70 (shown in fig. 12 as capacitor C only); the connection relation and specific functions of the device are as follows:
the buffer circuit 70 is connected in parallel with the power-taking end of the power supply circuit, and is used for preventing the output voltage of the first power-taking device 01 from generating transient and/or preventing the output current of the first power-taking device 01 from generating transient, and meanwhile, playing a role of EMC (electromagnetic compatibility) filtering.
It should be noted that the buffer circuit 70 is already a relatively mature technology in the prior art, and generally consists of a capacitor and/or an inductor, which will not be described herein.
Another embodiment of the present application provides a motor controller, whose specific structure is shown in fig. 8-12, and specifically includes: a power conversion circuit (in fig. 8-12, the power conversion circuit is not shown for simplicity), a controller 100, and a power supply circuit as provided in the above-described embodiments; the connection relationship between the devices is specifically as follows:
the direct current side of the power conversion circuit is connected with a connection port of a power battery 02 in the whole vehicle system where the motor controller is located, and the alternating current side of the power conversion circuit is used for supplying power to a corresponding motor in the whole vehicle system.
If the internal power circuit of the motor controller includes the controller 100, the output end of the power supply circuit is connected to the power supply end of the controller 100, as shown in fig. 8-12; in practical applications, the output terminal of the power supply circuit is also connected to the power supply terminals of other circuits in the motor controller, which are not described in detail herein, and which are not shown in fig. 8-12.
The features described in the various embodiments of the present disclosure may be interchanged or combined with each other in the above description of the disclosed embodiments to enable those skilled in the art to make or use the present application. The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modifications to equivalent embodiments using the methods and technical contents disclosed above, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (20)

1. A method of powering a motor controller, comprising:
judging whether power taking of a power supply path of an internal power circuit in the motor controller is stable or not;
if the power supply of the power supply path is unstable, enabling an emergency power supply in the motor controller to be integrated into the power supply path of the internal power utilization circuit; the power taking position of the emergency power supply is different from the power taking position of the power supply path.
2. The power supply method according to claim 1, wherein determining whether or not power taking of a power supply path of an internal power circuit in the motor controller is stable includes:
judging whether the power-taking voltage of the power supply path exceeds a preset range in a preset time;
if the power-taking voltage exceeds the preset range in the preset time, judging that the power-taking of the power supply path is unstable;
and if the power-taking voltage does not exceed the preset range within the preset time, judging that the power-taking of the power supply path is stable.
3. The power supply method according to claim 2, wherein the preset time is a unit time.
4. A power supply method according to any one of claims 1 to 3, further comprising, after the emergency power supply in the motor controller is incorporated into the power supply path of the internal power utilization circuit:
judging whether the power supply of the power supply path is abnormal;
and if the power taking of the power supply path is not abnormal, cutting the emergency power supply from the power supply path.
5. The power supply method according to claim 4, wherein determining whether power take-off of the power supply path is abnormal comprises:
judging whether the power-taking voltage of the power supply path is smaller than a first preset value or not;
if the power-taking voltage is smaller than the first preset value, the power-taking of the power supply path is abnormal;
and if the power-taking voltage is larger than or equal to the first preset value, judging that the power-taking of the power supply path is not abnormal.
6. The power supply method according to claim 4, wherein if the power supply path includes a reverse connection preventing circuit disposed between a power take-off end of the power supply path and an integration point of the emergency power supply, the reverse connection preventing circuit is configured to suppress a reverse current on the power supply path, when it is determined that the power take-off of the power supply path is abnormal, performing the steps of:
judging whether the motor controller needs to discharge outwards through a power taking end of the power supply path;
and if the motor controller needs to discharge outwards through the power taking end of the power supply path, the reverse connection preventing circuit is short-circuited.
7. A power supply method according to any one of claims 1 to 3, further comprising:
judging whether the output of the emergency power supply is abnormal or not;
and if the output of the emergency power supply is abnormal, reporting the abnormal output to a whole vehicle controller of a whole vehicle system where the motor controller is located.
8. The power supply method according to claim 7, wherein determining whether the output of the emergency power supply is abnormal comprises:
judging whether the output voltage of the emergency power supply is smaller than a second preset value or not;
if the output voltage of the emergency power supply is smaller than the second preset value, judging that the output of the emergency power supply is abnormal;
and if the output voltage of the emergency power supply is greater than or equal to the second preset value, judging that the output of the emergency power supply is not abnormal.
9. A power supply circuit for a motor controller, comprising: the power supply circuit comprises an emergency power supply, a first detection circuit, a first on-off control circuit and an internal power utilization circuit of the motor controller; wherein:
the emergency power supply is integrated into the power supply path through the first on-off control circuit;
the first detection circuit is connected with a controller in the motor controller and is used for detecting the electricity taking parameter of the power supply path;
the first on-off control circuit is controlled by the controller for performing the power supply method according to any one of claims 1 to 8.
10. The power supply circuit of claim 9, wherein the power supply path comprises: a low voltage power supply; wherein:
the input end of the low-voltage power supply is used as the input end of the power supply path, and the output end of the low-voltage power supply is connected with the power supply end of the internal power utilization circuit.
11. The power supply circuit of claim 10, wherein the power supply path further comprises: an anti-reverse connection circuit; wherein:
the input end of the low-voltage power supply is connected with the input end of the power supply path through the reverse connection preventing circuit;
the anti-reverse circuit is used for suppressing reverse current on the power supply path.
12. The power supply circuit according to claim 10 or 11, wherein an output of the emergency power supply is connected to an input of the power supply; or alternatively, the process may be performed,
the output end of the emergency power supply is connected with the output end of the low-voltage power supply.
13. The power supply circuit according to any one of claims 9 to 12, wherein if the power supply path includes: anti-reverse connection circuit, then power supply circuit still includes: a second on-off control circuit; wherein:
the second on-off control circuit is controlled by the controller; the second on-off control circuit is connected with the reverse connection preventing circuit in parallel.
14. The power supply circuit according to any one of claims 9 to 12, wherein the first detection circuit is a first voltage detection circuit for detecting a power supply voltage of the power supply path.
15. The power supply circuit according to any one of claims 9 to 12, characterized by further comprising: a second detection circuit; wherein:
the second detection circuit is connected with the controller and used for detecting the output parameters of the emergency power supply.
16. The power supply circuit of claim 15, wherein the second detection circuit is a second voltage detection circuit for detecting an output voltage of the emergency power supply.
17. The power supply circuit according to any one of claims 9 to 12, wherein the power supply path takes power from a battery in an overall vehicle system in which the motor controller is located;
the emergency power supply takes electricity from a power battery in the whole vehicle system where the motor controller is located.
18. The power supply circuit according to any one of claims 9 to 12, characterized by further comprising: a buffer circuit; wherein:
the buffer circuit is connected with the power taking end of the power supply circuit in parallel.
19. A power supply circuit according to any one of claims 9 to 12, characterized in that the switching device employed in the on-off control circuit comprises: relay, MOS transistor, triode or IGBT.
20. A motor controller, comprising: a power conversion circuit, a controller and a power supply circuit as claimed in any one of claims 9 to 19; wherein:
the direct current side of the power conversion circuit is connected with a power battery in a whole vehicle system where the motor controller is located, and the alternating current side of the power conversion circuit is used for supplying power to a corresponding motor in the whole vehicle system;
the internal power circuit of the motor controller comprises the controller.
CN202310195776.2A 2023-02-27 2023-02-27 Motor controller and power supply circuit and power supply method thereof Pending CN116154936A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310195776.2A CN116154936A (en) 2023-02-27 2023-02-27 Motor controller and power supply circuit and power supply method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310195776.2A CN116154936A (en) 2023-02-27 2023-02-27 Motor controller and power supply circuit and power supply method thereof

Publications (1)

Publication Number Publication Date
CN116154936A true CN116154936A (en) 2023-05-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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