CN113131439B - Motor control system and motor control device - Google Patents
Motor control system and motor control device Download PDFInfo
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- CN113131439B CN113131439B CN201911409289.1A CN201911409289A CN113131439B CN 113131439 B CN113131439 B CN 113131439B CN 201911409289 A CN201911409289 A CN 201911409289A CN 113131439 B CN113131439 B CN 113131439B
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- unit
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- bridge arm
- power supply
- driving
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0822—Integrated protection, motor control centres
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Abstract
The application discloses a motor control system, at least comprising a driving unit, a monitoring unit and a power unit. The driving unit is electrically connected to the power unit and used for converting the received low-voltage driving signal into a high-voltage driving signal and outputting the high-voltage driving signal to the power unit, the power unit outputs a power driving signal provided by the high-voltage battery according to the high-voltage driving signal, and the power driving signal is used for driving a motor connected to the power unit to rotate. The monitoring unit is electrically connected to the driving unit, the driving unit is used for outputting a diagnosis signal representing the running state of the driving unit to the monitoring unit, and if the diagnosis signal received by the monitoring unit represents that the driving unit is in a fault state, the monitoring unit controls the power unit to stop receiving the high-voltage driving signal output by the driving unit, so that the motor stops rotating. The application also discloses a motor control device, which comprises the motor control system.
Description
Technical Field
The application relates to the field of motor control, in particular to a motor control system and a motor control device.
Background
With the rapid development of electric vehicles, more and more attention is paid to the driving control of a motor, which is one of core devices in the electric vehicle.
In the current motor control system, the functionality and performance of the motor are designed, and the safety of the power supply part and the driving part of the motor is not considered, so that the traditional motor control system is difficult to achieve a higher safety level when being applied to an electric automobile.
Disclosure of Invention
To solve the foregoing problems, an embodiment of the present application provides a motor control system and a motor control device.
In one embodiment of the present application, a motor control system includes a drive unit, a monitoring unit, and a power unit. The driving unit is electrically connected to the power unit and used for converting the received low-voltage driving signal into a high-voltage driving signal and outputting the high-voltage driving signal to the power unit. And the power unit outputs a power supply driving signal provided by a high-voltage battery according to the high-voltage driving signal. The power supply driving signal is used for driving a motor connected to the power unit to rotate. The monitoring unit is electrically connected to the driving unit and the power unit, and the driving unit is further configured to output a diagnostic signal representing an operating state of the driving unit to the monitoring unit. If the diagnostic signal received by the monitoring unit represents that the driving unit is in a fault state, the monitoring unit outputs a control signal to the power unit to control the power unit to stop receiving the high-voltage driving signal output by the driving unit and stop the motor from rotating. An embodiment of the present application provides a motor control device, including the aforementioned motor control system. Compared with the prior art, the motor control system disclosed in the embodiment of the application is provided with the monitoring unit, so that when the driving unit is in fault, the monitoring unit controls the power unit to stop outputting the power driving signal for driving the motor to rotate, the motor is controlled to stop rotating, and the safety level of the electric device using the motor control system is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a motor control system disclosed in an embodiment of the present application;
fig. 2 is a schematic structural diagram of the motor control system shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. Directional phrases used in this disclosure, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings and are, therefore, used herein for better and clearer illustration and understanding of the invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present application, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that the intended meaning is consistent when the difference is not emphasized. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," and the like do not denote any order or importance, but rather the terms "first," "second," and the like do not denote any order or importance. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Compared with the traditional fuel automobile, the electric automobile is moved by the motor supported by pure electric power, and important parameters such as the rotating speed, the current, the voltage and the like of the motor in the running process need to be monitored and controlled by the motor control system, so that the safety and the stability of the electric automobile in the running process can be improved by the motor control system with a high safety level.
Please refer to fig. 1, which is a schematic structural diagram of a motor control system according to an embodiment of the present disclosure. As shown in fig. 1, the motor control system 100 includes a power supply unit 101, a control unit 102, a drive unit 103, a monitoring unit 104, and a power unit 105.
The power supply unit 101 is electrically connected to the control unit 102 and the driving unit 103, and is configured to provide a first power signal for the control unit 102, the control unit 102 controls the driving unit 103 under a driving action of the first power signal, and is further configured to provide the first power signal and a second power signal for the driving unit 103, and the driving unit 103 performs work under a driving action of the first power signal and the second power signal.
The control unit 102 is electrically connected to the driving unit 103, and is configured to output an enable signal and a low-voltage driving signal to the driving unit 103 when the driving unit performs a work under a driving action of the first power signal.
The driving unit 103 is electrically connected to the power unit 105, and configured to receive the enable signal and the low-voltage driving signal when performing a simultaneous driving action of the first power signal and the second power signal, start to convert the low-voltage driving signal into a high-voltage driving signal according to a first potential of the enable signal, output the high-voltage driving signal to the power unit 105, and stop converting the low-voltage driving signal into the high-voltage driving signal according to a second potential of the enable signal.
The driving unit 103 is further configured to output a fault signal to the control unit 102 when a fault occurs, and the control unit 102 converts the enable signal from the first potential to the second potential according to the received fault signal and stops outputting the low-voltage driving signal to the driving unit 103.
The power unit 105 is electrically connected to the high voltage battery 300 and the motor 200, and is configured to output a power driving signal provided by the high voltage battery 300 to the motor 200 under the control of the high voltage driving signal output from the driving unit 103, where the power driving signal is used to drive the motor 200 to rotate.
The driving unit 103 is electrically connected to the monitoring unit 104, and is configured to output a diagnostic signal representing an operation state of the driving unit 103 to the monitoring unit 104, where the operation state includes a fault and a non-fault, so that the monitoring unit 104 adjusts a potential of the control signal output to the power unit 105 according to a potential change of the diagnostic signal, so that the power unit 105 outputs or stops outputting the power driving signal to the motor 200.
Further, if the driving unit 103 is in a non-failure state, the diagnostic signal output to the monitoring unit 104 is the first potential, and the control signal output by the monitoring unit 104 is the first potential, so that the power unit 105 continues to output the power driving signal to the motor 200; if the driving unit 103 is in a failure state, the diagnostic signal output to the monitoring unit 104 is changed from the first potential to the second potential, and the control signal output by the monitoring unit 104 is the second potential to stop the power unit 105 from outputting the power driving signal to the motor 200.
In the embodiment of the present application, the driving unit 103 includes a detection circuit for detecting its own operation state, so that the driving unit 103 can output a fault signal to the control unit 102 when a fault occurs, and convert the diagnostic signal from the first potential to the second potential.
In the embodiment of the present application, there are at least two processing manners when the driving unit 103 fails. One of them is that the monitoring unit 104 can control the power unit 105 to stop working when the driving unit 103 fails by monitoring the running state of the driving unit 103 in real time; the other is that when the driving unit 103 fails, the control unit 102 receives a failure signal output by the driving unit 103 to stop outputting the enable signal and the low voltage driving signal to the driving unit 103, and stops the driving unit 103 from operating. According to the motor control system 100, a redundant control structure can be formed on the fault processing of the driving unit 103 through the two modes, so that when the control unit 102 in the motor control system 100 cannot timely control the driving unit 103 to stop working due to power supply and the like, the fault of the driving unit 103 can be processed through the monitoring unit 104, and the motor control system 100 has a higher safety level.
In the embodiment of the application, the enable signal includes an upper bridge arm enable signal, a lower bridge arm enable signal and a safety enable signal. The low-voltage driving signals comprise upper bridge arm low-voltage driving signals and lower bridge arm low-voltage driving signals, the high-voltage driving signals comprise upper bridge arm high-voltage driving signals and lower bridge arm high-voltage driving signals, the fault signals comprise upper bridge arm fault signals and lower bridge arm fault signals, the diagnosis signals comprise upper bridge arm diagnosis signals, lower bridge arm diagnosis signals, first primary side power supply diagnosis signals, first secondary side power supply diagnosis signals, second primary side power supply diagnosis signals and second secondary side power supply diagnosis signals, and the control signals comprise first control signals and second control signals.
Specifically, please refer to fig. 2, which is a schematic structural diagram of the motor control system shown in fig. 1. As shown in fig. 2, the power supply unit 101 includes a battery unit 1011, a high voltage unit 1012, a first transforming unit 1013, a second transforming unit 1014, and a switching unit 1015.
The battery unit 1011 is electrically connected to the switching unit 1015, and is configured to output a first direct current voltage to the switching unit 1015.
The high voltage unit 1012 is electrically connected to the first voltage transforming unit 1013, and is configured to output a second dc voltage to the first voltage transforming unit 1013.
The first transforming unit 1013 is electrically connected to the switching unit 1015, and is configured to receive the second dc voltage output by the high voltage unit 1012, and output a third dc voltage to the switching unit 1015 after performing a transforming process on the second dc voltage.
The switching unit 1015 is electrically connected to the control unit 102 and the driving unit 103, and is configured to output the first direct current voltage as a first power signal to the control unit 102 and the driving unit 103 when the first direct current voltage is within the threshold range, and further output the third direct current voltage as the first power signal to the control unit 102 and the driving unit 103 when the first direct current voltage exceeds the threshold range.
The high voltage unit 1012 is further electrically connected to the second transforming unit 1014, and is configured to output a second dc voltage to the second transforming unit 1014.
The second transforming unit 1014 is further electrically connected to the driving unit 103, and is configured to transform the second dc voltage output by the high voltage unit 1012 and output a second power signal to the driving unit 103.
In this embodiment, the threshold range is a numerical range, and as long as the value of the first direct current voltage is within the range, the switching unit 1015 outputs the first direct current voltage as the first power signal; otherwise, the third dc voltage is outputted as the first power signal.
In the embodiment of the present application, the switching unit 1015 preferentially outputs the first direct-current voltage output by the battery unit 2011 to the control unit 102 and the driving unit 201 as the first power signal. Alternatively, the switching unit 1015 may preferentially output the third dc voltage output by the first transforming unit 1013 to the control unit 102 and the driving unit 103 as the first power signal.
For example, in a normal state, the threshold range is 9.5V to 10.5V, the first dc voltage and the third dc voltage output by the battery unit 1011 and the first transforming unit 013 are both limited to 10V, and the switching unit 1015 outputs the first dc voltage as the first power signal; however, if the first dc voltage is suddenly changed to 9V, the switching unit 1015 outputs the third dc voltage as the first power signal. The switching unit 1015 switches the first dc voltage and the third dc voltage in this way. The first dc voltage, the third dc voltage and the threshold range may also be set to other values according to actual requirements, which is not specifically limited in this embodiment of the application.
The control unit 102 includes a power supply unit 1021, a security logic unit 1022, an information acquisition unit 1023, and a main control unit 1024.
The power supply unit 1021 is electrically connected to the main control unit 1024 and the switching unit 1015 in the power supply unit 101, and is configured to receive the first power signal output by the switching unit 1015, and output the main control power signal to the main control unit 1024 after processing the first power signal, so that the main control unit 1024 executes work under the driving action of the main control power signal.
The power supply unit 1021 is further configured to receive the master control diagnostic signal output by the master control unit 1024, and output or stop outputting the master control power supply signal to the master control unit 1024 according to the master control diagnostic signal. The master control diagnosis signal is used for representing the working state of the master control unit 1024, the working state of the master control unit 1024 includes a fault state and a non-fault state, and if the working state is the non-fault state, the master control unit 1024 outputs a first potential in the master control diagnosis signal so that the power supply unit 1021 continues to output the master control power supply signal; if the power supply unit 1021 is in the failure state, the master control unit 1024 outputs the second voltage level in the master control diagnostic signal to stop outputting the master control power supply signal.
The main control unit 1024 is electrically connected to the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036 in the driving unit 103, and is configured to output an upper bridge arm enable signal and an upper bridge arm low-voltage driving signal to the three-phase upper bridge arm driving unit 1033 and output a lower bridge arm enable signal and a lower bridge arm low-voltage driving signal to the three-phase lower bridge arm driving unit 1036 when the main control power supply signal is driven to operate.
The main control unit 1024 is further configured to receive an upper bridge arm fault signal output by the three-phase upper bridge arm driving unit 1033 and a lower bridge arm fault signal output by the three-phase lower bridge arm driving unit 1036, stop outputting an upper bridge arm low-voltage driving signal and converting an upper bridge arm enable signal from a first potential to a second potential under the action of the upper bridge arm fault signal to stop the three-phase upper bridge arm driving unit 1033 from operating, and stop outputting a lower bridge arm low-voltage driving signal and converting a lower bridge arm enable signal from the first potential to the second potential under the action of the lower bridge arm fault signal to stop the three-phase lower bridge arm driving unit 1036 from operating.
The main control unit 1024 is further electrically connected to the information acquisition unit 1023, and is configured to receive the acquisition signal output by the information acquisition unit, where the acquisition signal includes important parameters of the motor 200 such as current, voltage, and rotation speed during operation, and adjust the output upper bridge arm enable signal, upper bridge arm low-voltage drive signal, lower bridge arm enable signal, and lower bridge arm low-voltage drive signal according to the acquisition signal.
The safety logic unit 1022 is electrically connected to the power supply unit 1021 and the main control unit 1024, and is configured to receive a power supply diagnosis signal output by the power supply unit 1021 and a main control diagnosis signal output by the main control unit 1024, and output a first potential in the safety enable signal to the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036 when the power supply diagnosis signal and the main control diagnosis signal are both at the first potential, so that the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036 execute operations; and when any one of the power unit 1021 and the main control unit 1024 converts the respective diagnostic signal from the first potential to the second potential due to a fault, outputting the second potential in the safety enable signal to the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036, so that the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036 stop operating.
In this embodiment, when the control unit 102 normally executes a work, the power supply unit 1021 processes the first power supply signal output by the switching unit 1015 and outputs a main control power supply signal to the main control unit 1024, so that the main control unit 1024 drives internal components to work and outputs an upper bridge arm enable signal and an upper bridge arm low-voltage driving signal to the three-phase upper bridge arm driving unit 1033, and outputs a lower bridge arm enable signal and a lower bridge arm low-voltage driving signal to the three-phase lower bridge arm driving unit 1036.
In this embodiment, when the power supply unit 1021 suffers from a fault, the power supply unit 1021 outputs a power failure signal to the safety logic unit 1022, so that the safety logic unit 1022 converts the safety enable signal from the first potential to the second potential, and the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036 in the driving unit 103 stop operating.
In this embodiment, when the main control unit 1024 encounters a fault, the main control unit 1024 converts the main control diagnostic signal input to the power supply unit 1021 and the safety logic unit 1022 from the first potential to the second potential, so that the power supply unit 1021 stops outputting the main control power supply signal, and the safety logic unit 1022 converts the safety enable signal from the first potential to the second potential, so that the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036 in the driving unit 103 stop operating.
The driving unit 103 includes a first primary power supply 1031, a first secondary power supply 1032, a three-phase upper bridge arm driving unit 1033, a second primary power supply 1034, a second secondary power supply 1035, and a three-phase lower bridge arm driving unit 1036.
The first primary power supply 1031 is electrically connected to the three-phase upper bridge arm driving unit 1033 and the switching unit 1015 in the power supply unit 101, and is configured to receive the first power supply signal output by the switching unit 1015 and output the first primary power supply signal to the three-phase upper bridge arm driving unit 1033 according to an action of the first power supply signal.
The first secondary power 1032 is electrically connected to the three-phase upper bridge arm driving unit 1033 and the switching unit 1015 in the power supply unit 101, and is configured to receive the first power signal output by the switching unit 1015, and output the first secondary power signal to the three-phase upper bridge arm driving unit 1033 according to an effect of the first power signal.
The first primary power 1031 is electrically connected to the first standby control unit 1041 in the monitoring unit 104, and is configured to output a first primary power diagnosis signal representing a working state of the first primary power 1031 to the first standby control unit 1041, where the working state of the first primary power 1031 includes a fault state and a non-fault state.
The first secondary power source 1032 is electrically connected to the first standby control unit 1041 in the monitoring unit 104, and is configured to output a first secondary power source diagnostic signal indicating an operating state of the first secondary power source 1032 to the first standby control unit 1041, where the operating state of the first secondary power source 1032 includes a fault state and a non-fault state.
The three-phase upper arm driving unit 1033 is configured to receive a first primary power signal output by the first primary power supply 1031 and a first secondary power signal output by the first secondary power supply 1032, and drive a component in a primary side of the three-phase upper arm driving unit 1033 to execute work according to an effect of the first primary power signal.
The three-phase upper arm driving unit 1033 is further configured to receive a first secondary power signal output by the first secondary power source 1032, and drive a component in a secondary side of the three-phase upper arm driving unit 1033 to execute a work according to an effect of the first secondary power signal.
The three-phase upper bridge arm driving unit 1033 is further electrically connected to the power unit 105, and is configured to receive an upper bridge arm enable signal and an upper bridge arm low-voltage driving signal output by the main control unit 1024 in the control unit 102, receive a safety enable signal output by the safety logic unit 1022, receive a first potential in the upper bridge arm enable signal to start converting the upper bridge arm low-voltage driving signal into the upper bridge arm high-voltage driving signal under the simultaneous driving action of the first primary-side power signal and the first secondary-side power signal, transmit the upper bridge arm high-voltage driving signal to the power unit 105, and receive a second potential in the upper bridge arm enable signal to stop converting the upper bridge arm low-voltage driving signal into the upper bridge arm high-voltage driving signal under the simultaneous driving action of the first primary-side power signal and the first secondary-side power signal.
The three-phase upper bridge arm driving unit 1033 is further electrically connected to the first standby control unit 1041 in the monitoring unit 104, and is configured to output an upper bridge arm diagnosis signal representing a working state of the three-phase upper bridge arm driving unit 1033, where the upper bridge arm diagnosis signal includes a first potential and a second potential, the first potential represents a non-fault state, and the second potential represents a fault state.
The three-phase upper arm driving unit 1033 is further configured to output an upper arm fault signal to the first primary side power supply 1031, so that the first primary side power supply 1031 stops outputting the first primary side power supply signal to the primary side of the three-phase upper arm driving unit 1033 when receiving the upper arm fault signal.
The three-phase upper bridge arm driving unit 1033 is further configured to output an upper bridge arm diagnosis signal to the first secondary power supply 1032, so that the output of the first secondary power supply signal to the secondary side of the three-phase upper bridge arm driving unit 1033 is stopped when the upper bridge arm diagnosis signal received by the first secondary power supply 1032 is suddenly changed from the first potential representing the non-fault state to the second potential representing the fault state.
In the present embodiment, the three-phase upper arm driving unit 1033 is configured by an upper arm primary side (not shown), an iron core (not shown), and an upper arm secondary side (not shown). The primary side of the upper bridge arm is configured to receive a first primary power signal, an upper bridge arm enable signal, an upper bridge arm low-voltage drive signal, and a safety enable signal, and further configured to output an upper bridge arm fault signal to the main control unit 1024. The secondary side of the upper bridge arm is configured to receive the first secondary power signal and the first standby control signal, and further configured to output an upper bridge arm diagnostic signal to the first standby control unit 1041 and output an upper bridge arm high-voltage driving signal to the power unit 105.
The second primary-side power source 1034 is electrically connected to the three-phase lower bridge arm driving unit 1036 and the switching unit 1015 in the power supply unit 101, and is configured to receive the first power signal output by the switching unit 1015, and output a second primary-side power signal to the three-phase lower bridge arm driving unit 1036 according to an effect of the first power signal.
The second secondary power source 1035 is electrically connected to the three-phase lower bridge arm driving unit 1036 and the second voltage transforming unit 1014 in the power supply unit 101, and is configured to receive the second power signal output by the second voltage transforming unit 1014 and output the second secondary power signal to the three-phase lower bridge arm driving unit 1036 according to the effect of the second power signal.
The second primary side power supply 1034 is electrically connected to the second standby control unit 1043 in the monitoring unit 104, and is configured to output a second primary side power supply diagnosis signal representing a working state of the second primary side power supply 1034 to the second standby control unit 1043, where the working state of the second primary side power supply 1034 includes a fault state and a non-fault state.
The second secondary power source 1035 is electrically connected to the second standby control unit 1043 in the monitoring unit 104, and is configured to output a first secondary power diagnostic signal indicating an operating state of the second secondary power source 1035 to the second standby control unit 1043, where the operating state of the second secondary power source 1035 includes a fault state and a non-fault state.
The three-phase lower bridge arm driving unit 1036 is configured to receive a second primary power signal output by the second primary power 1034, and drive components in a primary side of the three-phase lower bridge arm driving unit 1036 to perform work according to an action of the second primary power signal.
The three-phase lower arm driving unit 1036 is further configured to receive a second secondary power signal output by the second secondary power source 1035, and drive a component in a secondary side of the three-phase lower arm driving unit 1036 to perform work according to an effect of the second secondary power signal.
The three-phase lower bridge arm driving unit 1036 is further electrically connected to the power unit 105, and is configured to receive a lower bridge arm enable signal and a lower bridge arm low-voltage driving signal output by the main control unit 1024 in the control unit 102, receive a safety enable signal output by the safety logic unit 1022, receive a first potential in the lower bridge arm enable signal to start converting the lower bridge arm low-voltage driving signal into the lower bridge arm high-voltage driving signal under the simultaneous driving action of the second primary-side power signal and the second secondary-side power signal, output the lower bridge arm high-voltage driving signal to the power unit 105, and receive a second potential in the lower bridge arm enable signal to stop converting the lower bridge arm low-voltage driving signal into the lower bridge arm high-voltage driving signal under the simultaneous driving action of the second primary-side power signal and the second secondary-side power signal.
The three-phase lower bridge arm driving unit 1036 is further electrically connected to the second standby control unit 1043 in the monitoring unit 104, and is configured to output a lower bridge arm diagnosis signal representing a working state of the three-phase lower bridge arm driving unit 1036, where the lower bridge arm diagnosis signal includes a first potential and a second potential, the first potential represents a non-fault state, and the second potential represents a fault state.
The three-phase lower bridge arm driving unit 1036 is further configured to output a lower bridge arm fault signal to the second primary-side power supply 1034, so that the second primary-side power supply 1034 stops outputting the second primary-side power supply signal to the primary side of the three-phase lower bridge arm driving unit 1036 when receiving the lower bridge arm fault signal.
The three-phase lower arm driving unit 1036 is further configured to output a lower arm diagnosis signal to the second secondary side power supply 1035, so that when the lower arm diagnosis signal received by the second secondary side power supply 1035 is suddenly changed from the first potential to the second potential, the output of the second secondary side power supply signal to the secondary side of the three-phase lower arm driving unit 1036 is stopped.
In the present embodiment, the three-phase lower arm driving unit 1036 includes a lower arm primary side (not shown), an iron core (not shown), and a lower arm secondary side (not shown). The primary side of the lower bridge arm is configured to receive a second primary power signal, a lower bridge arm enable signal, a lower bridge arm low-voltage drive signal, and a safety enable signal, and is further configured to output a lower bridge arm fault signal to the main control unit 1024. The secondary side of the lower arm is configured to receive the second secondary power signal and the second standby control signal, and further configured to output a lower arm diagnostic signal to the second standby control unit 1043 and output a lower arm high-voltage driving signal to the power unit 105.
The monitoring unit 104 includes a first standby control unit 1041, a first isolation unit 1042, a second standby control unit 1043, and a second isolation unit 1044.
The first standby control unit 1041 is electrically connected to the first primary power supply 1031, the first secondary power supply 1032 and the three-phase upper bridge arm driving unit 1033 in the driving unit 103, and is also electrically connected to the first isolation unit 1042, and is configured to receive the first primary power supply diagnostic signal, the first secondary power supply diagnostic signal and the upper bridge arm diagnostic signal, and output the first isolation control signal to the first isolation unit 1042 according to a working state represented by the first primary power supply diagnostic signal, the first secondary power supply diagnostic signal and the upper bridge arm diagnostic signal.
The first isolation unit 1042 is electrically connected to the power unit 105, and configured to output a first control signal to the power unit 105 under the action of the first isolation control signal, where the first control signal is used to control the power unit 105 to receive or stop receiving the upper bridge arm high voltage driving signal output from the driving unit 103.
Further, if the working state represented by the first primary-side power supply diagnostic signal or the first secondary-side power supply diagnostic signal or the upper-arm diagnostic signal received by the first standby control unit 1041 is converted from the non-fault working state to the fault state, the first standby control unit 1041 controls the first isolation unit 1042 to adjust the potential of the first control signal output to the power unit 105, so that the power unit 105 stops receiving the upper-arm high-voltage driving signal output from the driving unit 103.
The second standby control unit 1043 is electrically connected to the second primary side power supply 1034, the second secondary side power supply 1035 and the three-phase lower bridge arm driving unit 1036 in the driving unit 103, and is also electrically connected to the second isolation unit 1044, and is configured to receive the second primary side power supply diagnostic signal, the second secondary side power supply diagnostic signal and the lower bridge arm diagnostic signal, and output the second isolation control signal to the second isolation unit 1044 according to the working state represented by the second primary side power supply diagnostic signal, the second secondary side power supply diagnostic signal and the lower bridge arm diagnostic signal.
The second isolation unit 1044 is electrically connected to the power unit 105, and is configured to output a second control signal to the power unit 105 under the action of the second isolation control signal, where the second control signal is used to control the power unit to receive or stop receiving the lower bridge arm high voltage driving signal output from the driving unit 103.
Further, if the working state represented by the second primary-side power supply diagnostic signal or the second secondary-side power supply diagnostic signal or the lower bridge arm diagnostic signal received by the second standby control unit 1043 is converted from the non-fault working state to the fault state, the second standby control unit 1043 controls the second isolation unit 1044 to adjust the potential of the second control signal output to the power unit 105, so that the power unit 105 stops receiving the lower bridge arm high-voltage driving signal output from the driving unit 103.
In the embodiment of the present application, the monitoring unit 104 may be used as an independent peripheral unit to be combined with an existing unit, so that the existing scheme is expanded to improve the security level of the existing scheme. Meanwhile, the first standby control unit 1041 and the second standby control unit 1043 may be Field Programmable Gate Array (FPGA) devices or Complex Programmable Logic Device (CPLD) devices, and may also select Digital Signal Processing (DSP) devices for performing operations quickly. In addition, the first isolation unit 1042 and the second isolation unit 1044 are connected to gates of MOS transistors in the power unit 105, which are used to control transmission of the upper bridge arm high-voltage driving signal and the lower bridge arm high-voltage driving signal, that is, the first isolation unit 1042 and the second isolation unit 1044 respectively output a first control signal and a second control signal to the gates of the MOS transistors in the power unit 105 under the control of the first standby control unit 1041 and the second standby control unit 1043, so as to control the MOS transistors to be turned on or off, and control whether the power unit 105 can normally output a power driving signal to the motor 200, so as to control the motor to rotate or stop rotating.
The power unit 105 is electrically connected to the driving unit 103, and is configured to output a power driving signal provided by the high voltage battery 300 to the motor 200 under the control of a high voltage driving signal output from the driving unit 103, where the power driving signal is used to drive the motor 200 to rotate.
The power unit 105 is further electrically connected to the monitoring unit 104, and configured to receive the first control signal or the second control signal output by the monitoring unit 104, and receive or stop receiving the upper bridge arm high-voltage driving signal or the lower bridge arm high-voltage driving signal output by the driving unit according to the effect of the first control signal or the second control signal.
In this embodiment, when the driving unit 103 works normally, the first primary power supply 1031 and the first secondary power supply 1032 respectively output a first primary power supply signal and a first secondary power supply signal to the primary side and the secondary side of the three-phase upper arm driving unit 1033, so that the three-phase upper arm driving unit 1033 can start to perform transformation processing on the upper arm low-voltage driving signal and output the upper arm high-voltage driving signal to the power unit 105 when receiving the first potential of the upper arm enable signal and the first potential of the safety enable signal output by the control unit 102 at the same time, so that the power unit 105 can convert the upper arm low-voltage driving signal into a power supply driving signal capable of enabling the motor to rotate.
In this embodiment, if the three-phase upper bridge arm driving unit 1033 in the driving unit suffers from a fault, the three-phase upper bridge arm driving unit 1033 outputs an upper bridge arm fault signal to the main control unit 1024, so that the main control unit 1024 converts the upper bridge arm enable signal from the first potential to the second potential and stops outputting the upper bridge arm low-voltage driving signal, so that the three-phase upper bridge arm driving unit 1033 stops working. Meanwhile, the three-phase upper arm driving unit 1033 may further convert the upper arm diagnosis signal output to the first standby control unit 1041 from the first potential to a second potential, so that the first standby control unit 1041 controls the first isolation unit 1042 to adjust the potential of the first control signal output to the power unit 105, and the power unit 105 stops receiving the upper arm high voltage driving signal output from the driving unit 103. This redundant failure processing manner can also be used for processing the failure state of the driving unit 103 by the monitoring unit 104 when the main control unit 1024 cannot timely stop the driving unit 103 due to power supply or other failures, so that the motor apparatus to which the motor control system 100 is applied has a higher safety level.
In the embodiment of the present application, the three-phase upper bridge arm driving unit 1033 and the three-phase lower bridge arm driving unit 1036 in the driving unit 103 are symmetrically arranged, and the three-phase lower bridge arm driving unit 1036 is similar to the three-phase upper bridge arm driving unit 1033 in the normal operation and when a fault occurs, and therefore, the description thereof is omitted. In addition, when the motor control system 100 is operating normally, only the three-phase upper arm drive unit 1033 or the three-phase lower arm drive unit 1036 is operating at the same time, and both units cannot operate simultaneously. If the three-phase upper arm driving unit 1033 stops operating due to a fault, the driving unit 103 may start the three-phase lower arm driving unit 1037 to ensure that the motor apparatus to which the motor control system 100 is applied can be in a relatively safe operating state.
In the embodiment of the present application, a motor control apparatus is further disclosed, which includes the aforementioned motor control system 100.
Compared with the prior art, the motor control system 100 disclosed in the embodiment of the present application can switch between the first dc voltage output by the battery unit 1011 and the third dc voltage output by the first voltage transformation unit 1013 by adding the switching unit 1015 to the power supply unit 101, so that one signal can be switched to another signal in time when one signal fails, and the power supply safety of the electric device using the motor control system 100 in the operation process is improved. In addition, the motor control system 100 further includes a monitoring unit 104, and a redundant failure control structure can be configured with the control unit 102 when the driving unit 103 fails, that is, the monitoring unit 104 can handle a failure state of the driving unit 103 even when the control unit 102 cannot stop the driving unit 103. It can be seen that the safety level of the electric device to which the motor control system 100 is applied is improved in the motor control system 100 by the modification of the power supply unit 101 and the addition of the monitoring unit 104.
The motor control system and the motor control device disclosed in the embodiments of the present application are described in detail above, and specific examples are applied in the present application to explain the principle and the embodiments of the present application, and the description of the above embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (11)
1. A motor control system, characterized by comprising at least a drive unit, a monitoring unit and a power unit, wherein,
the driving unit is electrically connected to the power unit and used for converting a received low-voltage driving signal into a high-voltage driving signal and outputting the high-voltage driving signal to the power unit, the power unit outputs a power driving signal provided by a high-voltage battery according to the high-voltage driving signal, and the power driving signal is used for driving a motor connected to the power unit to rotate;
the monitoring unit is electrically connected to the driving unit and the power unit, the driving unit is further used for outputting a diagnosis signal representing the running state of the driving unit to the monitoring unit, the monitoring unit comprises a first standby control unit and a first isolation unit, the first standby control unit is electrically connected to the driving unit and the first isolation unit, the first standby control unit is used for receiving the diagnosis signal output by the driving unit, the first isolation unit is electrically connected to the power unit and is used for outputting a first control signal to the power unit, if the diagnosis signal received by the first standby control unit represents that the driving unit is in a fault state, the first standby control unit controls the potential of the first control signal to be adjusted, and the first control signal after the potential adjustment controls the power unit to stop receiving the high-voltage driving signal output by the driving unit And stopping the motor from rotating.
2. The motor control system of claim 1, further comprising a control unit,
the control unit is electrically connected to the driving unit and is used for outputting an enable signal and the low-voltage driving signal to the driving unit, and the enable signal is used for controlling the driving unit to start or stop converting the low-voltage driving signal into the high-voltage driving signal;
when the driving unit fails, a fault signal is output to the control unit, the fault signal is used for representing that the driving unit is in a fault state, and the control unit stops outputting the low-voltage driving signal according to the fault signal and adjusts the potential of the enabling signal so as to control the driving unit to stop outputting the high-voltage driving signal.
3. The motor control system of claim 2, wherein the drive units comprise a first primary power source, a first secondary power source, and a three-phase upper leg drive unit, wherein,
the first primary side power supply is electrically connected to the three-phase upper bridge arm driving unit, and is used for processing a received first power supply signal and outputting a first primary side power supply signal to the three-phase upper bridge arm driving unit, and is also used for stopping outputting the first primary side power supply signal to the three-phase upper bridge arm driving unit when receiving an upper bridge arm fault signal in the fault signals output by the three-phase upper bridge arm driving unit;
the first secondary power supply is electrically connected to the three-phase upper bridge arm driving unit, and is used for processing the received first power supply signal and outputting a first secondary power supply signal to the three-phase upper bridge arm driving unit, and also used for receiving an upper bridge arm diagnosis signal in the diagnosis signals output by the three-phase upper bridge arm driving unit, and stopping outputting the first secondary power supply signal to the three-phase upper bridge arm driving unit when the upper bridge arm diagnosis signal indicates that the three-phase upper bridge arm driving unit is in a fault state, wherein the upper bridge arm diagnosis signal is used for indicating a fault state and a non-fault state of the three-phase upper bridge arm driving unit.
4. The motor control system of claim 3, wherein the three-phase upper bridge arm driving unit is configured to receive an enable signal and an upper bridge arm low-voltage driving signal of the low-voltage driving signals output from the control unit under the driving action of the first primary power signal and the first secondary power signal, and convert the upper bridge arm low-voltage driving signal into an upper bridge arm high-voltage driving signal of the high-voltage driving signals;
the three-phase upper bridge arm driving unit is further used for outputting the upper bridge arm fault signal to the first primary side power supply, so that the first primary side power supply stops outputting the first primary side power supply signal to the three-phase upper bridge arm driving unit when receiving the upper bridge arm fault signal indicating that the three-phase upper bridge arm driving unit fails, and the three-phase upper bridge arm driving unit stops receiving the enabling signal and the upper bridge arm low-voltage driving signal output from the control unit;
the three-phase upper bridge arm driving unit is further used for outputting the upper bridge arm diagnosis signal to the first secondary power supply, so that the first secondary power supply stops outputting the first secondary power supply signal to the three-phase upper bridge arm driving unit when receiving the upper bridge arm diagnosis signal representing the fault state of the three-phase upper bridge arm driving unit, and the three-phase upper bridge arm driving unit stops converting the upper bridge arm low-voltage driving signal into an upper bridge arm high-voltage driving signal.
5. The motor control system of claim 4, wherein the drive units further comprise a second primary power source, a second secondary power source, and a three-phase lower leg drive unit, wherein,
the second primary side power supply is electrically connected to the three-phase lower bridge arm driving unit, and is used for processing the received first power supply signal and outputting a second primary side power supply signal to the three-phase lower bridge arm driving unit, and is also used for stopping outputting the second primary side power supply signal to the three-phase lower bridge arm driving unit when receiving a lower bridge arm fault signal in the fault signals output by the three-phase lower bridge arm driving unit;
the second secondary side power supply is electrically connected to the three-phase lower bridge arm driving unit, and is used for processing the received second power supply signal and outputting a second secondary side power supply signal to the three-phase lower bridge arm driving unit, and is also used for receiving a lower bridge arm diagnosis signal in the diagnosis signal output by the three-phase lower bridge arm driving unit, and stopping outputting the second secondary side power supply signal to the three-phase lower bridge arm driving unit when the lower bridge arm diagnosis signal indicates that the three-phase lower bridge arm driving unit is in a fault state, and the lower bridge arm diagnosis signal is used for indicating the fault state and the non-fault state of the three-phase lower bridge arm driving unit.
6. The motor control system of claim 5, wherein the three-phase lower leg driving unit is configured to receive an enable signal and a lower leg low voltage driving signal of the low voltage driving signals output from the control unit under the driving action of the second primary power signal and the second secondary power signal, and convert the lower leg low voltage driving signal into a lower leg high voltage driving signal of the high voltage driving signals;
the three-phase lower bridge arm driving unit is further used for outputting the lower bridge arm fault signal to the second primary side power supply, so that the second primary side power supply stops outputting the second primary side power supply signal to the three-phase lower bridge arm driving unit when receiving the lower bridge arm fault signal indicating that the three-phase lower bridge arm driving unit fails, and the three-phase lower bridge arm driving unit stops receiving the enabling signal and the lower bridge arm low-voltage driving signal output from the control unit;
the three-phase lower bridge arm driving unit is further configured to output the lower bridge arm diagnosis signal to the second secondary side power supply, so that the second secondary side power supply stops outputting the second secondary side power supply signal to the three-phase lower bridge arm driving unit when receiving the lower bridge arm diagnosis signal representing the fault state of the three-phase lower bridge arm driving unit, and the three-phase lower bridge arm driving unit stops converting the lower bridge arm low-voltage driving signal into the lower bridge arm high-voltage driving signal.
7. The motor control system of claim 5 or 6, wherein the first primary power supply is further electrically connected to the first standby control unit, the first primary power supply is further configured to output a first primary power supply diagnostic signal indicative of an operating state of the first primary power supply to the first standby control unit, the operating state of the first primary power supply includes a fault state and a non-fault state;
the first secondary power supply is further electrically connected to the first standby control unit, and the first secondary power supply is further configured to output a first secondary power supply diagnosis signal representing a working state of the first secondary power supply in the diagnosis signals to the first standby control unit, where the working state of the first secondary power supply includes a fault state and a non-fault state;
the first standby control unit is electrically connected to the first isolation unit and the three-phase upper bridge arm driving unit, and is used for receiving the upper bridge arm diagnosis signal, controlling the potential of the first control signal to be adjusted when the upper bridge arm diagnosis signal, the first primary side power supply diagnosis signal or the first secondary side power supply diagnosis signal is suddenly changed from a non-fault state to a fault state, and controlling the power unit to stop receiving the upper bridge arm high-voltage driving signal output from the three-phase upper bridge wall driving unit by the first control signal after the potential adjustment.
8. The motor control system of claim 7, wherein the monitoring unit further comprises a second backup control unit and a second isolation unit, wherein,
the second primary side power supply is also electrically connected to the second standby control unit and is also used for outputting a second primary side power supply diagnosis signal representing the working state of the second primary side power supply in the diagnosis signals to the second standby control unit, and the working state of the second primary side power supply comprises a fault state and a non-fault state;
the second secondary power supply is further electrically connected to the second standby control unit, and the second secondary power supply is further configured to output a second secondary power supply diagnosis signal representing a working state of the second secondary power supply to the second standby control unit, where the working state of the second secondary power supply includes a fault state and a non-fault state;
the second isolation unit is electrically connected to the power unit and used for outputting a second control signal of the control signals to the power unit;
the second standby control unit is electrically connected to the second isolation unit and the three-phase lower bridge arm driving unit, and is used for receiving the lower bridge arm diagnosis signal, controlling the potential of the second control signal to be adjusted when the lower bridge arm diagnosis signal, the second primary side power supply diagnosis signal or the second secondary side power supply diagnosis signal is suddenly changed from a non-fault state to a fault state, and controlling the power unit to stop receiving the lower bridge arm high-voltage driving signal output from the three-phase lower bridge wall driving unit through the second control signal after the potential adjustment.
9. The motor control system according to claim 8, further comprising a power supply unit electrically connected to the control unit and the driving unit, and configured to output the first power signal to the control unit, wherein the control unit controls operation of the driving unit under a driving action of the first power signal, and is configured to output the first power signal and the second power signal to the driving unit, and the driving unit outputs the high-voltage driving signal to the power unit under the driving action of the first power signal and the second power signal.
10. The motor control system according to claim 9, wherein the power supply unit includes a battery unit, a high voltage unit, a first voltage transforming unit, a switching unit, and a second voltage transforming unit, wherein,
the battery unit is electrically connected to the switching unit and used for outputting a first direct current voltage to the switching unit;
the high-voltage unit is electrically connected to the first voltage transformation unit and is used for outputting a second direct current voltage to the first voltage transformation unit so that the first voltage transformation unit performs voltage transformation on the second direct current voltage and then outputs a third direct current voltage to the switching unit electrically connected with the first voltage transformation unit;
the switching unit is electrically connected to the control unit and the driving unit, and is configured to output the first direct current voltage as the first power signal to the control unit and the driving unit when the first direct current voltage is within a threshold range, and further output the third direct current voltage as the first power signal to the control unit and the driving unit when the first direct current voltage exceeds the threshold range;
the second voltage transformation unit is electrically connected to the high-voltage unit and used for receiving the second direct-current voltage output by the high-voltage unit;
the second transforming unit is further electrically connected to the driving unit, and is configured to output the second power signal to the driving unit after performing transforming processing on the second dc voltage, and the second power signal and the first power signal jointly drive the driving unit to output the high-voltage driving signal to the power unit.
11. A motor control device characterized by comprising the motor control system according to any one of claims 1 to 10.
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