CN110966172B - Electric automobile, compressor and control method and device of compressor - Google Patents
Electric automobile, compressor and control method and device of compressor Download PDFInfo
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- CN110966172B CN110966172B CN201811156863.2A CN201811156863A CN110966172B CN 110966172 B CN110966172 B CN 110966172B CN 201811156863 A CN201811156863 A CN 201811156863A CN 110966172 B CN110966172 B CN 110966172B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
Abstract
The invention discloses an electric automobile, a compressor, and a control method and a control device of the compressor, wherein the compressor comprises a high-voltage reverse connection prevention module arranged in a direct-current bus loop, and the control method comprises the following steps: acquiring direct-axis current of a motor; and if the direct-axis current is less than 0, carrying out bus voltage protection control on the compressor. According to the control method of the compressor, when the direct-axis current of the motor is less than 0, the bus voltage protection control can be performed on the compressor, the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
Description
Technical Field
The invention relates to the technical field of electric automobile compressor control, in particular to an electric automobile, a compressor and a compressor control method and device.
Background
The high-voltage direct-current compressor of the electric automobile is an important component of a new energy automobile system, and the compressor can be connected with a high-voltage system through a high-voltage wire harness. Generally, a compressor can drive a motor to rotate through an inverter driving module, but during the deceleration process of the motor, the counter potential of the motor may rise due to system inertia, when the counter potential of the motor is higher than the bus voltage of the inverter driving module, energy can flow to a direct current bus circuit through a freewheeling diode due to the existence of a freewheeling circuit in a parasitic diode of a power device in the inverter driving module, and the bus voltage rises due to the absorption of energy by a capacitor of the direct current bus circuit.
However, because the compressor is connected in the high-voltage system of the electric vehicle, when the compressor has energy feedback, the compressor can feed back energy to the high-voltage system of the electric vehicle through the direct-current bus connection, and the rise of the voltage of the direct-current bus not only can bring adverse effects to the devices of the high-voltage system, but also can cause the damage of the devices, but also can reduce the reliability of the compressor, and further can greatly reduce the reliability and stability of the high-voltage system of the electric vehicle.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a control method for a compressor, which can perform bus voltage protection control on the compressor when a direct-axis current of a motor is less than 0, so as to reduce adverse effects on devices of a high-voltage system, reduce damages to the devices, improve reliability and stability of the high-voltage system, and effectively improve reliability of the compressor.
A second object of the present invention is to provide a control device for a compressor.
A third object of the present invention is to propose a compressor.
The fourth purpose of the invention is to provide an electric automobile.
A fifth object of the invention is to propose an electronic device.
A sixth object of the invention is to propose a non-transitory computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a control method for a compressor, where the compressor includes a high-voltage reverse connection prevention module disposed in a dc bus circuit, and the control method includes: acquiring direct-axis current of a motor; and if the direct-axis current is less than 0, carrying out bus voltage protection control on the compressor.
According to an embodiment of the present invention, the bus voltage protection control of the compressor includes: acquiring the direct current bus voltage of the motor; and controlling the start and stop of the motor and the on and off of a switching device in the high-voltage reverse connection prevention module and/or the inversion driving module according to the voltage of the direct current bus.
According to an embodiment of the present invention, the controlling the start/stop of the motor and the on/off of the switching device in the high-voltage reverse connection preventing module and/or the inverter driving module according to the dc bus voltage includes: and if the voltage of the direct current bus is greater than a preset first voltage threshold and is equal to or less than a preset second voltage threshold, controlling the motor to stop, controlling a switching device in the high-voltage reverse connection prevention module to keep a turn-off state, and/or controlling a lower switching device in the inversion driving module to keep a turn-on state.
According to an embodiment of the present invention, the controlling the start/stop of the motor and the on/off of the switching device in the high-voltage reverse connection preventing module and/or the inverter driving module according to the dc bus voltage further includes: if the direct current bus voltage is greater than the second voltage threshold, the motor is controlled to stop, the switching device in the high-voltage reverse connection prevention module is controlled to keep a conducting state, the information that the bus voltage is too high is sent to a high-voltage system, the direct current bus voltage is reduced and adjusted by the high-voltage system, and/or the lower switching device in the inversion driving module is controlled to keep a conducting state.
According to an embodiment of the present invention, the obtaining of the direct-axis current of the motor includes: acquiring direct current bus current; and calculating to obtain the direct-axis current according to the direct-current bus current.
According to an embodiment of the present invention, the control method of the compressor further includes: and if the direct-axis current is equal to or greater than 0, normally controlling the compressor.
According to the control method of the compressor, the direct-axis current of the motor can be obtained, and when the direct-axis current is smaller than 0, the bus voltage protection control is carried out on the compressor. Therefore, when the direct-axis current of the motor is smaller than 0, the bus voltage protection control can be carried out on the compressor, the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
In order to achieve the above object, a second aspect of the present invention provides a control device for a compressor, the compressor including a high-voltage reverse connection prevention module disposed in a dc bus circuit, the control device including: the acquisition module is used for acquiring direct-axis current of the motor; and the control module is used for carrying out bus voltage protection control on the compressor when the direct-axis current is less than 0.
According to an embodiment of the present invention, the control module is specifically configured to: acquiring the direct current bus voltage of the motor; and controlling the start and stop of the motor and the on and off of a switching device in the high-voltage reverse connection prevention module and/or the inversion driving module according to the voltage of the direct current bus.
According to an embodiment of the present invention, the control module is specifically configured to: and if the voltage of the direct current bus is greater than a preset first voltage threshold and is equal to or less than a preset second voltage threshold, controlling the motor to stop, controlling a switching device in the high-voltage reverse connection prevention module to keep a turn-off state, and/or controlling a lower switching device in the inversion driving module to keep a turn-on state.
According to an embodiment of the present invention, the control module is specifically configured to: if the direct current bus voltage is greater than the second voltage threshold, the motor is controlled to stop, the switching device in the high-voltage reverse connection prevention module is controlled to keep a conducting state, the information that the bus voltage is too high is sent to a high-voltage system, the direct current bus voltage is reduced and adjusted by the high-voltage system, and/or the lower switching device in the inversion driving module is controlled to keep a conducting state.
According to the control device of the compressor, the direct-axis current of the motor can be acquired through the acquisition module, and when the direct-axis current is smaller than 0, the bus voltage protection control is performed on the compressor through the control module. Therefore, when the direct-axis current of the motor is smaller than 0, the bus voltage protection control can be carried out on the compressor, the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
In order to achieve the above object, a third aspect of the present invention provides a compressor, which includes the control device of the compressor.
According to the compressor provided by the embodiment of the invention, through the control device of the compressor, when the direct-axis current of the motor is less than 0, the bus voltage protection control can be performed on the compressor, so that the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
In order to achieve the above object, a fourth aspect of the present invention provides an electric vehicle, which includes the above compressor.
According to the electric automobile provided by the embodiment of the invention, through the compressor, when the direct-axis current of the motor is less than 0, the bus voltage protection control can be performed on the compressor, so that the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
In order to achieve the above object, a fifth embodiment of the present invention provides an electronic device, including: the compressor control method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the compressor is realized.
According to the electronic equipment provided by the embodiment of the invention, by executing the control method of the compressor, when the direct-axis current of the motor is less than 0, the bus voltage protection control can be carried out on the compressor, so that the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
In order to achieve the above object, a sixth aspect of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, the program, when executed by a processor, implementing the control method of the compressor described above.
According to the non-transitory computer readable storage medium of the embodiment of the invention, by executing the control method of the compressor, when the direct axis current of the motor is less than 0, the bus voltage protection control can be performed on the compressor, so that the adverse effect on the high-voltage system device is reduced, the damage to the device is reduced, the reliability and stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flowchart of a control method of a compressor according to an embodiment of the present invention;
FIG. 2 is a voltage drive schematic of a compressor based on a bus voltage protection strategy according to one embodiment of the present invention;
FIG. 3 is a voltage drive schematic of a compressor based on a bus voltage protection strategy according to another embodiment of the present invention;
FIG. 4 is a flow diagram of bus voltage protection control logic according to one embodiment of the present invention;
fig. 5 is a block schematic diagram of a control apparatus of a compressor according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes an electric vehicle, a compressor, and a control method and device of the compressor according to an embodiment of the present invention with reference to the drawings.
Fig. 1 is a flowchart of a control method of a compressor according to an embodiment of the present invention.
As shown in fig. 2, in one embodiment of the present invention, the compressor includes a high voltage reverse connection prevention module S1, a dc bus voltage detection module S2, a dc bus current detection module S3 and an inverter driving module disposed in the dc bus circuit.
The high-voltage reverse connection prevention module S1 may be an reverse connection prevention circuit including a diode and a switching device connected in parallel, and is not limited to a common power semiconductor, but may also be an optical coupling relay or a mechanical relay, for example, the high-voltage reverse connection prevention module S1 may include an N-type MOS transistor, at the initial stage of power-up, a parasitic diode of the power transistor Q01 in the high-voltage reverse connection prevention module S1 is turned on to form a high-voltage bus loop, after the diode is turned on, the drain-source voltage of the power transistor Q01 is a diode drop, at this time, the gate-source voltage is higher than the MOS transistor turn-on voltage threshold, and the power transistor Q01 is turned on; the direct-current bus voltage detection module S2 is used for detecting the direct-current bus voltage; the direct current bus current detection module S3 is used for detecting the direct current bus current; the inverter driving module can be constructed by six switching tubes (such as Q1, Q2, Q3, Q4, Q5 and Q6), wherein Q1, Q3 and Q5 are upper switching devices in the inverter driving module, and Q2, Q4 and Q6 are lower switching devices in the inverter driving module, so that the working voltage is regularly applied to a three-phase winding of the motor under the control of a PWM signal to enable the motor to work.
As shown in fig. 1, the control method of the compressor includes the steps of:
and S1, acquiring the direct-axis current of the motor.
According to one embodiment of the invention, obtaining a direct axis current of a motor comprises: acquiring direct current bus current; and calculating to obtain the direct-axis current according to the direct-current bus current.
Specifically, as shown in fig. 2, when the motor operates, the dc bus current of the motor may be sampled and analyzed by the dc bus current detection module S1, so as to perform motor three-phase current reconstruction calculation and coordinate conversion according to the collected dc bus current to obtain a d-axis current and a q-axis current of the motor, where the d-axis current of the motor is the direct-axis current of the motor.
And S2, if the direct axis current is less than 0, carrying out bus voltage protection control on the compressor.
Specifically, after the direct current bus current of the motor is obtained, the direct current of the motor after coordinate conversion can be compared and analyzed, and when the direct current of the motor is smaller than zero, bus voltage protection control is performed on the compressor. According to one embodiment of the invention, the bus voltage protection control of the compressor comprises the following steps: acquiring direct current bus voltage of a motor; and controlling the start and stop of the motor and the on and off of a switching device in the high-voltage reverse connection prevention module and/or the inversion driving module according to the voltage of the direct current bus.
Specifically, as shown in fig. 3, when the direct-axis current is less than 0, it may be determined that the motor enters a field weakening state according to a voltage and torque equation of the motor, a back electromotive force of the motor increases, when the back electromotive force of the motor is higher than a dc bus voltage, a freewheeling circuit is formed due to the existence of a parasitic diode of a power tube in the inverter driving module, and the motor may feed back energy to the bus voltage through the parasitic diode freewheeling circuit, charge the dc bus capacitor E1, so that a dc bus voltage value increases, and feed back energy to the vehicle-mounted high-voltage system through the high-voltage bus connection.
Therefore, when the motor runs, the direct current bus voltage of the motor can be sampled and analyzed through the direct current bus voltage detection module, so that the startup/shutdown and high-voltage reverse connection prevention module of the motor is controlled according to the direct current bus voltage, or the on/off of a switch device in the inverter driving module is controlled, or the startup/shutdown and high-voltage reverse connection prevention module of the motor and the on/off of the switch device in the inverter driving module are controlled simultaneously.
Further, according to an embodiment of the present invention, controlling the power on/off of the motor and the on/off of the switching device in the high-voltage reverse connection prevention module and/or the inverter driving module according to the dc bus voltage includes: and if the voltage of the direct current bus is greater than a preset first voltage threshold and is equal to or less than a preset second voltage threshold, controlling the motor to stop, controlling a switching device in the high-voltage reverse connection prevention module to keep a turn-off state, and/or controlling a lower switching device in the inversion driving module to keep a turn-on state.
Specifically, after the dc bus voltage is collected by the dc bus voltage detection module, if the collected dc bus voltage is greater than a first voltage threshold, for example, the first voltage threshold may be 500V, and the dc bus voltage is less than or equal to a second voltage threshold, for example, the second voltage threshold may be 600V or 650V, etc., the dc bus voltage is increased, but the motor failure is not caused, so that the motor can be controlled to stop by the motor power tube driving control algorithm, the power tube Q01 of the high-voltage reverse connection prevention module S1 in the dc bus loop is kept in a turned-off state, and the high-voltage dc motor system is disconnected from the vehicle-mounted high-voltage system, thereby preventing the dc motor system from feeding back energy to the vehicle-mounted high-voltage system and affecting the system reliability.
In addition, after the motor is stopped, the lower switching devices Q2, Q4 and Q6 in the inverter driving module can be controlled to keep a conducting state, so that the direct current bus capacitor, the inverter driving module and the motor form a current loop, and the voltage value of the direct current bus is reduced.
Further, according to an embodiment of the present invention, the method for controlling the power on/off of the motor and the on/off of the switching device in the high-voltage reverse connection prevention module and/or the inverter driving module according to the dc bus voltage further includes: if the direct current bus voltage is larger than the second voltage threshold, the motor is controlled to stop, the switching device in the high-voltage reverse connection prevention module is controlled to keep a conducting state, the information that the bus voltage is too high is sent to the high-voltage system, the direct current bus voltage is reduced and adjusted by the high-voltage system, and/or the lower switching device in the inverter driving module is controlled to keep a conducting state.
Specifically, if the collected dc bus voltage is greater than the second voltage threshold, it indicates that the dc bus voltage is too high, which may affect the performance of the motor system or even cause a fault, and therefore, the motor may be controlled to stop by the motor power transistor drive control algorithm, and the lower switching devices Q2, Q4, and Q6 of the inverter driving module are kept in a conducting state, so that the dc bus capacitor, the inverter driving module, and the motor form a current loop, and the dc bus voltage value is reduced.
Meanwhile, setting the higher information bit Flag of the direct current bus voltage of the motor to be 1, transmitting the information to a vehicle-mounted high-voltage system through a communication bus, and keeping a power tube Q01 of a high-voltage reverse connection prevention module S1 in a direct current bus loop to be conducted so as to adjust the direct current bus voltage through the vehicle-mounted high-voltage system and enable the bus voltage value to be lower than a first voltage threshold value.
According to an embodiment of the present invention, the control method of the compressor further includes: and if the direct-axis current is equal to or greater than 0, normally controlling the compressor.
Specifically, if the direct axis current is equal to or greater than 0, the motor is normally driven.
As shown in fig. 4, in an embodiment of the present invention, the method for controlling a compressor includes the following steps:
s401, acquiring the current and the voltage of the direct current bus of the motor, and sampling and analyzing.
S402, calculating to obtain direct-axis current according to the direct-current bus current, and judging whether the direct-axis current is less than 0, if so, executing a step S404, otherwise, executing a step S403.
And S403, normally driving the motor.
S404, judging whether the voltage value of the direct current bus is larger than a second voltage threshold value, if so, executing a step S405, otherwise, executing a step S410.
And S405, the high-voltage direct-current compressor bus voltage is over-high, and the signal position is 1.
Step S408 is executed while step S406 is executed.
And S406, the high-voltage system receives the information that the bus voltage of the compressor is too high.
And S407, the high-voltage system regulates the bus voltage.
And S408, stopping the motor.
S409, the power tube Q01 of the reverse connection preventing module is switched on, and step S407 is executed.
And S410, judging whether the voltage value of the direct current bus is larger than a first voltage threshold value, if so, executing the step S411, otherwise, executing the step S414.
And S411, stopping the motor.
And S412, the power tube Q01 of the high-voltage reverse connection prevention module is turned off.
And S413, controlling a lower switch device of the inversion driving module to be switched on, and adjusting the bus voltage.
And S414, normally driving the motor.
Therefore, when the motor normally operates, the bus current can be sampled, the direct-axis current of the motor is obtained through control strategies such as coordinate transformation and the like, when the direct-axis current of the motor is smaller than 0, the counter electromotive force of the motor is judged to be increased, the detected voltage value of the high-voltage direct-current bus is compared with the first threshold voltage value and the second threshold voltage value respectively, and therefore corresponding control strategies are adopted according to comparison results respectively, damage to devices due to voltage increase is reduced, and reliability and stability of a high-voltage system are effectively improved.
According to the control method of the compressor provided by the embodiment of the invention, the direct-axis current of the motor can be obtained, and when the direct-axis current is less than 0, the bus voltage protection control is carried out on the compressor. Therefore, when the direct-axis current of the motor is smaller than 0, the bus voltage protection control can be carried out on the compressor, the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
Fig. 5 is a block diagram schematically illustrating a control apparatus of a compressor according to an embodiment of the present invention.
In this embodiment, the compressor includes a high-voltage reverse connection prevention module disposed in the dc bus circuit, and as shown in fig. 5, the control device of the compressor includes: an acquisition module 100 and a control module 200.
The obtaining module 100 is configured to obtain a direct-axis current of the motor; the control module 200 is configured to perform bus voltage protection control on the compressor when the direct-axis current is less than 0.
According to an embodiment of the present invention, the control module 200 is specifically configured to: acquiring direct current bus voltage of a motor; and controlling the start and stop of the motor and the on and off of a switching device in the high-voltage reverse connection prevention module and/or the inversion driving module according to the voltage of the direct current bus.
According to an embodiment of the present invention, the control module 200 is specifically configured to: and if the voltage of the direct current bus is greater than a preset first voltage threshold and is equal to or less than a preset second voltage threshold, controlling the motor to stop, controlling a switching device in the high-voltage reverse connection prevention module to keep a turn-off state, and/or controlling a lower switching device in the inversion driving module to keep a turn-on state.
According to an embodiment of the present invention, the control module 200 is specifically configured to: if the direct current bus voltage is larger than the second voltage threshold, the motor is controlled to stop, the switching device in the high-voltage reverse connection prevention module is controlled to keep a conducting state, the information that the bus voltage is too high is sent to the high-voltage system, the direct current bus voltage is reduced and adjusted by the high-voltage system, and/or the lower switching device in the inverter driving module is controlled to keep a conducting state.
It should be noted that the foregoing explanation of the embodiment of the control method of the compressor is also applicable to the control device of the compressor of this embodiment, and is not repeated herein.
According to the control device of the compressor provided by the embodiment of the invention, the direct-axis current of the motor can be acquired through the acquisition module, and when the direct-axis current is less than 0, the bus voltage protection control is carried out on the compressor through the control module. Therefore, when the direct-axis current of the motor is smaller than 0, the bus voltage protection control can be carried out on the compressor, the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
The embodiment of the invention provides a compressor, which comprises the control device of the compressor.
According to the compressor provided by the embodiment of the invention, through the control device of the compressor, when the direct-axis current of the motor is less than 0, the bus voltage protection control can be performed on the compressor, so that the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
The embodiment of the invention provides an electric automobile which comprises the compressor.
According to the electric automobile provided by the embodiment of the invention, through the compressor, when the direct-axis current of the motor is less than 0, the bus voltage protection control can be performed on the compressor, so that the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
An embodiment of the present invention provides an electronic device, including: the control method of the compressor is realized when the processor executes the program.
According to the electronic equipment provided by the embodiment of the invention, by executing the control method of the compressor, when the direct-axis current of the motor is less than 0, the bus voltage protection control can be carried out on the compressor, so that the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and the stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
An embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the control method of the compressor described above.
According to the non-transitory computer readable storage medium provided by the embodiment of the invention, by executing the control method of the compressor, when the direct axis current of the motor is less than 0, the bus voltage protection control can be performed on the compressor, so that the adverse effect on devices of a high-voltage system is reduced, the damage to the devices is reduced, the reliability and stability of the high-voltage system are improved, and the reliability of the compressor is effectively improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A control method of a compressor, which is characterized by comprising a high-voltage reverse connection prevention module arranged in a direct current bus circuit, is characterized by comprising the following steps:
acquiring direct-axis current of a motor;
if the direct-axis current is less than 0, carrying out bus voltage protection control on the compressor;
carry out bus voltage protection control to the compressor, include: acquiring the direct current bus voltage of the motor; controlling the start and stop of the motor and the on and off of a switch device in the high-voltage reverse connection prevention module and/or the inversion driving module according to the voltage of the direct current bus;
the controlling the start and stop of the motor and the on and off of the switch device in the high-voltage reverse connection preventing module and/or the inversion driving module according to the voltage of the direct current bus further comprises: if the direct current bus voltage is larger than a preset second voltage threshold value, the motor is controlled to stop, a switching device in the high-voltage reverse connection prevention module is controlled to keep a conducting state, and information that the bus voltage is too high is sent to a high-voltage system so that the high-voltage system can reduce and adjust the direct current bus voltage and/or control a lower switching device in the inversion driving module to keep the conducting state.
2. The control method according to claim 1, wherein the controlling of the start-stop of the motor and the on-off of the switching devices in the high-voltage reverse connection prevention module and/or the inverter driving module according to the direct-current bus voltage comprises:
and if the voltage of the direct current bus is greater than a preset first voltage threshold and is equal to or less than a preset second voltage threshold, controlling the motor to stop, controlling a switching device in the high-voltage reverse connection prevention module to keep a turn-off state, and/or controlling a lower switching device in the inversion driving module to keep a turn-on state.
3. The control method of claim 1, wherein the obtaining a direct axis current of the motor comprises:
acquiring direct current bus current;
and calculating to obtain the direct-axis current according to the direct-current bus current.
4. The control method according to claim 1, characterized by further comprising:
and if the direct-axis current is equal to or greater than 0, normally controlling the compressor.
5. A control apparatus of a compressor, the compressor including a high-voltage reverse connection prevention module provided in a dc bus circuit, the control apparatus comprising:
the acquisition module is used for acquiring direct-axis current of the motor;
the control module is used for carrying out bus voltage protection control on the compressor when the direct-axis current is less than 0;
the control module is specifically configured to: acquiring the direct current bus voltage of the motor; controlling the start and stop of the motor and the on and off of a switch device in the high-voltage reverse connection prevention module and/or the inversion driving module according to the voltage of the direct current bus;
the control module is specifically configured to: if the direct current bus voltage is larger than a preset second voltage threshold value, the motor is controlled to stop, a switching device in the high-voltage reverse connection prevention module is controlled to keep a conducting state, and information that the bus voltage is too high is sent to a high-voltage system so that the high-voltage system can reduce and adjust the direct current bus voltage and/or control a lower switching device in the inversion driving module to keep the conducting state.
6. The control device of claim 5, wherein the control module is specifically configured to:
and if the voltage of the direct current bus is greater than a preset first voltage threshold and is equal to or less than a preset second voltage threshold, controlling the motor to stop, controlling a switching device in the high-voltage reverse connection prevention module to keep a turn-off state, and/or controlling a lower switching device in the inversion driving module to keep a turn-on state.
7. A compressor, comprising: a control device for a compressor according to any one of claims 5 to 6.
8. An electric vehicle, comprising: the compressor of claim 7.
9. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor implementing a method of controlling a compressor according to any one of claims 1 to 4 when executing the computer program.
10. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements a control method of a compressor according to any one of claims 1 to 4.
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| CN201811156863.2A CN110966172B (en) | 2018-09-30 | 2018-09-30 | Electric automobile, compressor and control method and device of compressor |
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| CN201811156863.2A CN110966172B (en) | 2018-09-30 | 2018-09-30 | Electric automobile, compressor and control method and device of compressor |
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| CN106505527A (en) * | 2016-12-19 | 2017-03-15 | 广东美的制冷设备有限公司 | Motor drive protection device, over-voltage protection method and transducer air conditioning |
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| JPH0229809A (en) * | 1988-07-20 | 1990-01-31 | Sharp Corp | Motor driven compressor driving device for air conditioner |
| CN105270182A (en) * | 2014-06-27 | 2016-01-27 | 联合汽车电子有限公司 | Discharging method of new energy automobile for bus high voltage |
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