CN107579696B - Live switching method, device and system, motor, compressor and storage medium - Google Patents
Live switching method, device and system, motor, compressor and storage medium Download PDFInfo
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Abstract
The invention discloses a charged switching method, a charged switching device, a charged switching system, a motor, a compressor and a storage medium. According to the invention, when the motor driving circuit adopts a star connection method, the second end of the first-phase stator winding is disconnected, then the second end of the first-phase stator winding is connected to the first end of the second-phase stator winding, the first end of the second-phase stator winding is connected with the second end of the third-phase stator winding, then the second end of the second-phase stator winding is disconnected, and finally the second end of the second-phase stator winding is connected to the first end of the third-phase stator winding, so that the motor driving circuit can be switched from the star connection method to the delta connection method under the condition of electrification of the motor, and the normal operation of the motor is not influenced in the switching process.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a charged switching method, a charged switching device, a charged switching system, a motor, a compressor and a storage medium.
Background
The method has the advantages that the full-band energy efficiency is required to achieve the optimal effect in the control of a Permanent Magnet Synchronous Motor (PMSM), the main flux is required to be increased at medium and low frequencies, the stator current is reduced, the loss of a frequency converter and the motor is reduced, the main flux is reduced at high frequencies, the power factor of the motor caused by weak magnetism is reduced, the carrying capacity is weak, the efficiency of the motor is low, and the like.
Therefore, a star connection (corresponding to the low frequency) of a three-phase stator winding in a motor needs to be switched to a delta connection (corresponding to the high frequency), in the prior art, two groups of switches are usually arranged, one group corresponds to the star connection, the other group corresponds to the delta connection, and when the switching needs to be realized, the switching is realized through the switches.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a charged switching method, a charged switching device, a charged switching system, a motor, a compressor and a storage medium, and aims to solve the technical problem of how to realize charged switching of the motor.
In order to achieve the above object, the present invention provides a charged switching method for performing charged switching on a motor drive circuit, the motor drive circuit including: the three-phase bridge arm comprises a three-phase bridge arm and a three-phase stator winding, wherein the three-phase stator winding is divided into a first-phase stator winding, a second-phase stator winding and a third-phase stator winding;
the method comprises the following steps:
when the motor driving circuit adopts a star connection method, disconnecting the second ends of the first-phase stator windings, wherein the star connection method is that the first ends of the stator windings of all phases are respectively connected with the output ends of the three-phase bridge arm, and the second ends of the stator windings of all phases are mutually connected;
connecting a second end of the first phase stator winding to a first end of the second phase stator winding and connecting the first end of the second phase stator winding with a second end of the third phase stator winding;
disconnecting the second end of the second phase stator winding;
connecting a second end of the second phase stator winding to a first end of the third phase stator winding to enable switching of the motor drive circuit from star connection to delta connection.
Preferably, a first gating element is arranged between the second end of the first-phase stator winding and the second end of the second-phase stator winding, a second gating element is arranged between the second end of the second-phase stator winding and the second end of the third-phase stator winding, a third gating element is arranged between the second end of the second-phase stator winding and the first end of the third-phase stator winding, a fourth gating element is arranged between the second end of the first-phase stator winding and the first end of the second-phase stator winding, and a fifth gating element is arranged between the first end of the first-phase stator winding and the second end of the third-phase stator winding;
when the motor driving circuit adopts a star connection method, the first gating element and the second gating element are in a connected state, and the third gating element, the fourth gating element and the fifth gating element are in a disconnected state;
the steps in the method connect or disconnect the endpoints by controlling the state of the gating elements, respectively.
Preferably, when the motor driving circuit adopts a star connection method, disconnecting the second end of the first-phase stator winding specifically includes:
when the motor driving circuit adopts a star connection method, the first gating element is set to be in a disconnection state from a connection state, so that the second end of the first-phase stator winding is disconnected;
correspondingly, the connecting the second end of the first-phase stator winding to the first end of the second-phase stator winding and the connecting the first end of the second-phase stator winding to the second end of the third-phase stator winding specifically includes:
setting both the fourth gating element and the fifth gating element from an off state to an on state such that the second end of the first phase stator winding is connected to the first end of the second phase stator winding, which is connected to the second end of the third phase stator winding;
correspondingly, the disconnecting the second end of the second-phase stator winding specifically includes:
setting the second gating element from a connected state to a disconnected state to disconnect the second ends of the second phase stator windings;
correspondingly, the connecting the second end of the second-phase stator winding to the first end of the third-phase stator winding to realize switching the motor driving circuit from star connection to delta connection specifically includes:
setting the third gating element from the off state to the on state to connect the second end of the second phase stator winding to the first end of the third phase stator winding to thereby effect switching of the motor drive circuit from star connection to delta connection.
In order to achieve the above object, the present invention also provides a charged switching device, including: the charging switching method comprises a memory, a processor and a charging switching program stored on the memory and capable of running on the processor, wherein the charging switching program is configured to realize the steps of the charging switching method.
In addition, to achieve the above object, the present invention also provides a live switching system, including: a motor drive circuit and a live switching device as described above, the motor drive circuit including: the three-phase bridge arm comprises a three-phase bridge arm and a three-phase stator winding, wherein the three-phase stator winding is divided into a first-phase stator winding, a second-phase stator winding and a third-phase stator winding.
Further, to achieve the above object, the present invention also provides a motor including: a live switching system as described above.
Preferably, the motor is a permanent magnet synchronous motor.
Further, to achieve the above object, the present invention also provides a compressor comprising: a motor as described above.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a charging switching program which, when executed by a processor, implements the steps of the charging switching method as described above.
According to the invention, when the motor driving circuit adopts a star connection method, the second end of the first-phase stator winding is disconnected, then the second end of the first-phase stator winding is connected to the first end of the second-phase stator winding, the first end of the second-phase stator winding is connected with the second end of the third-phase stator winding, then the second end of the second-phase stator winding is disconnected, and finally the second end of the second-phase stator winding is connected to the first end of the third-phase stator winding, so that the motor driving circuit can be switched from the star connection method to the delta connection method under the condition of electrification of the motor, and the normal operation of the motor is not influenced in the switching process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures or procedures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a live-line switching device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a live-line switching method according to the present invention;
FIG. 3 is a schematic circuit diagram of a motor driving circuit in a star connection according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the circuit shown in FIG. 3 after processing according to step S10;
FIG. 5 is a schematic diagram of the circuit shown in FIG. 4 after processing according to step S20;
FIG. 6 is a schematic diagram of the circuit shown in FIG. 5 after processing according to step S30;
FIG. 7 is a schematic circuit diagram of the motor drive circuits connected in delta connection in an embodiment of the present invention;
fig. 8 is a circuit schematic of a motor driving circuit provided with a gate element in the embodiment of the present invention;
fig. 9 is a flowchart illustrating a live-line switching method according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are 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 addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a live-line switching device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the charging switching device may include: a processor 1001, such as a CPU, a communication bus 1002, and a memory 1003. Wherein a communication bus 1002 is used to enable connective communication between these components. The memory 1003 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1003 may alternatively be a storage device separate from the processor 1001.
It will be appreciated by those skilled in the art that the hot switching device configuration shown in fig. 1 is not intended to be limiting of the present invention and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, the memory 1003, which is a kind of computer storage medium, may include therein an operating system and a charging switching program.
In the charging switching apparatus shown in fig. 1, the charging switching apparatus calls a charging switching program stored in a memory 1003 by a processor 1001, and performs the following operations:
when the motor driving circuit adopts a star connection method, disconnecting the second ends of the first-phase stator windings, wherein the star connection method is that the first ends of the stator windings of all phases are respectively connected with the output ends of the three-phase bridge arm, and the second ends of the stator windings of all phases are mutually connected;
connecting a second end of the first phase stator winding to a first end of the second phase stator winding and connecting the first end of the second phase stator winding with a second end of the third phase stator winding;
disconnecting the second end of the second phase stator winding;
connecting a second end of the second phase stator winding to a first end of the third phase stator winding to enable switching of the motor drive circuit from star connection to delta connection.
Further, the processor 1001 may call the charging switching program stored in the memory 1003, and further perform the following operations:
the endpoints are connected or disconnected by controlling the state of the gating elements.
Further, the processor 1001 may call the charging switching program stored in the memory 1003, and further perform the following operations:
when the motor driving circuit adopts a star connection method, the first gating element is set to be in a disconnection state from a connection state, so that the second end of the first-phase stator winding is disconnected;
setting both the fourth gating element and the fifth gating element from an off state to an on state such that the second end of the first phase stator winding is connected to the first end of the second phase stator winding, which is connected to the second end of the third phase stator winding;
setting the second gating element from a connected state to a disconnected state to disconnect the second ends of the second phase stator windings;
setting the third gating element from the off state to the on state to connect the second end of the second phase stator winding to the first end of the third phase stator winding to thereby effect switching of the motor drive circuit from star connection to delta connection.
According to the scheme, when the motor driving circuit adopts the star connection method, the second end of the first-phase stator winding is disconnected, the second end of the first-phase stator winding is connected to the first end of the second-phase stator winding, the first end of the second-phase stator winding is connected with the second end of the third-phase stator winding, the second end of the second-phase stator winding is disconnected, and the second end of the second-phase stator winding is connected to the first end of the third-phase stator winding.
Based on the above hardware structure, the embodiment of the live switching method of the present invention is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a live-line switching method according to a first embodiment of the present invention.
In a first embodiment, the method is for live switching of a motor drive circuit, the motor drive circuit comprising: the three-phase bridge arm comprises a three-phase bridge arm and a three-phase stator winding, wherein the three-phase stator winding is divided into a first-phase stator winding, a second-phase stator winding and a third-phase stator winding;
the method comprises the following steps:
s10: disconnecting the second end of the first-phase stator winding when the motor driving circuit adopts a star connection method;
referring to fig. 3, in the star connection, a first end of each phase of stator winding (i.e., corresponding to three-phase stator windings "a", "B", and "C" in the figure) is connected to each output end of the three-phase bridge arm (i.e., corresponding to three ends "U", "V", and "W" in the figure), and a second end of each phase of stator winding is connected to each other; it is understood that "a" in the figure is the first phase stator winding, "B" is the second phase stator winding, and "C" is the third phase stator winding.
It can be understood that when the motor driving circuit adopts the star connection method, the motor driven by the motor driving circuit can normally run, and at the moment, the motor is usually in a medium-low frequency state, so that the stator current can be reduced, and the loss of a frequency converter and the motor can be reduced.
After the second ends of the first-phase stator windings are disconnected, referring to fig. 4, the motor can still operate normally, which corresponds to the first-phase stator windings in the star connection being in a phase-missing state.
S20: connecting a second end of the first phase stator winding to a first end of the second phase stator winding and connecting the first end of the second phase stator winding with a second end of the third phase stator winding;
it should be understood that, after the second end of the first phase stator winding is connected to the first end of the second phase stator winding and the first end of the second phase stator winding is connected to the second end of the third phase stator winding, referring to fig. 5, the first phase stator winding is equivalent to a short circuit state, and does not play any role, and therefore, does not affect the operation of the motor.
S30: disconnecting the second end of the second phase stator winding;
after the second ends of the second-phase stator windings are disconnected, referring to fig. 6, at this time, the motor can still operate normally, which corresponds to the second-phase stator windings in delta connection being in a phase-missing state.
S40: connecting a second end of the second phase stator winding to a first end of the third phase stator winding to enable switching of the motor drive circuit from star connection to delta connection.
It will be appreciated that after connecting the second end of the second phase stator winding to the first end of the third phase stator winding, the switching of the motor drive circuit from star connection to delta connection is completed with reference to fig. 7.
In a specific implementation, when the motor driving circuit adopts a delta connection method, a motor driven by the motor driving circuit can normally operate, and at the moment, the motor is usually in a high-frequency state, so that the problems of low motor power factor, weak loading capacity, low motor efficiency and the like caused by weak magnetism can be solved.
In this embodiment, when the motor driving circuit adopts a star connection method, the second end of the first-phase stator winding is disconnected, the second end of the first-phase stator winding is connected to the first end of the second-phase stator winding, the first end of the second-phase stator winding is connected to the second end of the third-phase stator winding, the second end of the second-phase stator winding is disconnected, and the second end of the second-phase stator winding is connected to the first end of the third-phase stator winding.
Further, a second embodiment of the live-line switching method of the present invention is proposed based on the first embodiment.
In this embodiment, the motor driving circuit may adopt the structure shown in fig. 8, specifically, a first gating element (i.e., "S1" in the corresponding figure) is disposed between the second end of the first-phase stator winding and the second end of the second-phase stator winding, a second gating element (i.e., "S2" in the corresponding figure) is disposed between the second end of the second phase stator winding and the second end of the third phase stator winding, a third gating element (i.e., "S3" in the corresponding figure) is disposed between the second end of the second phase stator winding and the first end of the third phase stator winding, a fourth gating element (i.e., "S4" in the corresponding figure) is disposed between the second end of the first phase stator winding and the first end of the second phase stator winding, a fifth gating element (i.e., "S5" in the corresponding figure) is arranged between the first end of the first phase stator winding and the second end of the third phase stator winding;
when the motor driving circuit adopts a star connection method, the first gating element and the second gating element are in a connected state, and the third gating element, the fourth gating element and the fifth gating element are in a disconnected state;
the steps in the method connect or disconnect the endpoints by controlling the state of the gating elements, respectively.
In a specific implementation, the gating element is a component that can implement a gating function, for example: a triode, a field effect transistor, etc., and in view of the stability of the gating function, in the present embodiment, the gating element may be a switching tube.
It should be noted that, in the process of switching the motor driving circuit from star connection to delta connection, multiple times of disconnection or connection of the end points are involved, and for implementation, five gating elements are provided between the stator windings of each phase, and at this time, each step in the method connects or disconnects the end points by controlling the state of each gating element.
Referring to fig. 9, specifically, step S10 specifically includes:
s10': when the motor driving circuit adopts a star connection method, the first gating element is set to be in a disconnection state from a connection state, so that the second end of the first-phase stator winding is disconnected;
correspondingly, step S20 specifically includes:
s20': setting both the fourth gating element and the fifth gating element from an off state to an on state such that the second end of the first phase stator winding is connected to the first end of the second phase stator winding, which is connected to the second end of the third phase stator winding;
correspondingly, step S30 specifically includes:
s30': setting the second gating element from a connected state to a disconnected state to disconnect the second ends of the second phase stator windings;
correspondingly, step S40 specifically includes:
s40': setting the third gating element from the off state to the on state to connect the second end of the second phase stator winding to the first end of the third phase stator winding to thereby effect switching of the motor drive circuit from star connection to delta connection.
The embodiment of the invention also discloses a charged switching system, which comprises: a motor drive circuit and a live switching device as described above, the motor drive circuit including: the three-phase bridge arm comprises a three-phase bridge arm and a three-phase stator winding, wherein the three-phase stator winding is divided into a first-phase stator winding, a second-phase stator winding and a third-phase stator winding.
The embodiment of the invention also discloses a motor, which comprises: a live switching system as described above.
In a specific implementation, the motor may be a motor that needs to switch connection in a live manner, for example: the motor is a permanent magnet synchronous motor, and of course, other types of motors can be used, which is not limited in this embodiment.
The embodiment of the invention also discloses a compressor, which comprises: a motor as described above.
It should be noted that, the above-mentioned live switching system, the motor and the compressor all include the above-mentioned technical solution of live switching device, so that the technical effect of live switching device is achieved, and no further description is given here.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where a charged switching program is stored on the computer-readable storage medium, and when executed by a processor, the charged switching program implements the following operations:
when the motor driving circuit adopts a star connection method, disconnecting the second ends of the first-phase stator windings, wherein the star connection method is that the first ends of the stator windings of all phases are respectively connected with the output ends of the three-phase bridge arm, and the second ends of the stator windings of all phases are mutually connected;
connecting a second end of the first phase stator winding to a first end of the second phase stator winding and connecting the first end of the second phase stator winding with a second end of the third phase stator winding;
disconnecting the second end of the second phase stator winding;
connecting a second end of the second phase stator winding to a first end of the third phase stator winding to enable switching of the motor drive circuit from star connection to delta connection.
Further, the live switching program, when executed by the processor, further implements the following operations:
the endpoints are connected or disconnected by controlling the state of the gating elements.
Further, the live switching program, when executed by the processor, further implements the following operations:
when the motor driving circuit adopts a star connection method, the first gating element is set to be in a disconnection state from a connection state, so that the second end of the first-phase stator winding is disconnected;
setting both the fourth gating element and the fifth gating element from an off state to an on state such that the second end of the first phase stator winding is connected to the first end of the second phase stator winding, which is connected to the second end of the third phase stator winding;
setting the second gating element from a connected state to a disconnected state to disconnect the second ends of the second phase stator windings;
setting the third gating element from the off state to the on state to connect the second end of the second phase stator winding to the first end of the third phase stator winding to thereby effect switching of the motor drive circuit from star connection to delta connection.
According to the scheme, when the motor driving circuit adopts the star connection method, the second end of the first-phase stator winding is disconnected, the second end of the first-phase stator winding is connected to the first end of the second-phase stator winding, the first end of the second-phase stator winding is connected with the second end of the third-phase stator winding, the second end of the second-phase stator winding is disconnected, and the second end of the second-phase stator winding is connected to the first end of the third-phase stator winding.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A live switching method for live switching of a motor drive circuit, the motor drive circuit comprising: the three-phase bridge arm comprises a three-phase bridge arm and a three-phase stator winding, wherein the three-phase stator winding is divided into a first-phase stator winding, a second-phase stator winding and a third-phase stator winding;
the method comprises the following steps:
when the motor driving circuit adopts a star connection method, disconnecting the second ends of the first-phase stator windings, wherein the star connection method is that the first ends of the stator windings of all phases are respectively connected with the output ends of the three-phase bridge arm, the second ends of the stator windings of all phases are mutually connected, and at the moment, the stator windings of the first phases are in a phase-missing state;
connecting the second end of the first phase stator winding to the first end of the second phase stator winding, and connecting the first end of the second phase stator winding to the second end of the third phase stator winding, wherein the first phase stator winding is in a short circuit state;
disconnecting the second end of the second phase stator winding;
connecting a second end of the second phase stator winding to a first end of the third phase stator winding to enable switching of the motor drive circuit from star connection to delta connection.
2. The method of claim 1, wherein a first gating element is disposed between the second end of the first phase stator winding and the second end of the second phase stator winding, a second gating element is disposed between the second end of the second phase stator winding and the second end of the third phase stator winding, a third gating element is disposed between the second end of the second phase stator winding and the first end of the third phase stator winding, a fourth gating element is disposed between the second end of the first phase stator winding and the first end of the second phase stator winding, and a fifth gating element is disposed between the first end of the first phase stator winding and the second end of the third phase stator winding;
when the motor driving circuit adopts a star connection method, the first gating element and the second gating element are in a connected state, and the third gating element, the fourth gating element and the fifth gating element are in a disconnected state;
the steps in the method connect or disconnect the endpoints by controlling the state of the gating elements, respectively.
3. The method of claim 2, wherein disconnecting the second end of the first phase stator winding when the motor drive circuit employs a wye connection, comprises:
when the motor driving circuit adopts a star connection method, the first gating element is set to be in a disconnection state from a connection state, so that the second end of the first-phase stator winding is disconnected;
correspondingly, the connecting the second end of the first-phase stator winding to the first end of the second-phase stator winding and the connecting the first end of the second-phase stator winding to the second end of the third-phase stator winding specifically includes:
setting both the fourth gating element and the fifth gating element from an off state to an on state such that the second end of the first phase stator winding is connected to the first end of the second phase stator winding, which is connected to the second end of the third phase stator winding;
correspondingly, the disconnecting the second end of the second-phase stator winding specifically includes:
setting the second gating element from a connected state to a disconnected state to disconnect the second ends of the second phase stator windings;
correspondingly, the connecting the second end of the second-phase stator winding to the first end of the third-phase stator winding to realize switching the motor driving circuit from star connection to delta connection specifically includes:
setting the third gating element from the off state to the on state to connect the second end of the second phase stator winding to the first end of the third phase stator winding to thereby effect switching of the motor drive circuit from star connection to delta connection.
4. A live switching apparatus, characterized in that the live switching apparatus comprises: a memory, a processor and a live switching program stored on the memory and executable on the processor, the live switching program being configured to implement the steps of the live switching method as claimed in any one of claims 1 to 3.
5. A live switching system, comprising: the live switching apparatus of claim 4 and a motor drive circuit, the motor drive circuit comprising: the three-phase bridge arm comprises a three-phase bridge arm and a three-phase stator winding, wherein the three-phase stator winding is divided into a first-phase stator winding, a second-phase stator winding and a third-phase stator winding.
6. An electric machine, characterized in that the electric machine comprises: the live switching system of claim 5.
7. The electric machine of claim 6, wherein the electric machine is a permanent magnet synchronous machine.
8. A compressor, characterized in that the compressor comprises: an electrical machine as claimed in any one of claims 6 to 7.
9. A computer-readable storage medium, characterized in that a charged-state switching program is stored thereon, which when executed by a processor implements the steps of the charged-state switching method according to any one of claims 1 to 3.
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| CN108173474A (en) * | 2018-01-19 | 2018-06-15 | 华中科技大学 | Based on the speed governing permanent magnet synchronous motor and its control method for changing winding connection |
| CN109210714A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Cooler compressor control method, control device and air conditioner |
| CN109210722A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | The progress control method and control device of air conditioner |
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| CN109210718B (en) * | 2018-08-23 | 2021-07-23 | 重庆海尔空调器有限公司 | Method and device for controlling air conditioner compressor based on distance |
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| CN109210720A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Air conditioner progress control method and control device |
| CN109210723B (en) * | 2018-08-23 | 2021-07-23 | 重庆海尔空调器有限公司 | Method for controlling air conditioner compressor based on distance |
| CN109210715A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Air conditioner and its compressor control method and control device |
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