CN117767823A - Phase sequence control method and system of three-phase asynchronous motor, controller and storage medium - Google Patents

Abstract

The embodiment of the invention relates to the technical field of motor control, and discloses a phase sequence control method and system of a three-phase asynchronous motor, a controller and a storage medium.

Description

Phase sequence control method and system of three-phase asynchronous motor, controller and storage medium

Technical Field

The embodiment of the invention relates to the technical field of motor control, in particular to a phase sequence control method and system of a three-phase asynchronous motor, a controller and a storage medium.

Background

The three-phase asynchronous motor (Triple-phase asynchronous motor) is a motor powered by simultaneously switching in three-phase alternating current (120 degrees in phase difference), and is called as a three-phase asynchronous motor because the rotor and the stator of the three-phase asynchronous motor rotate in the same direction and at different rotation speeds and have slip. The phase sequence of the three-phase asynchronous motor is the sequence from each group of coils to the power supply, and comprises a positive phase sequence and a negative phase sequence, wherein the phase sequences are different, and the rotation directions of the magnetic fields correspondingly generated are also different.

In implementing the embodiments of the present invention, the applicant has found that at least the following problems exist in the above related art: currently, there is no clear indication of power supply phase sequence due to the prevalence of factory power supply systems. When the equipment is installed and debugged for the first time, incorrect phase sequence can lead to the opposite movement direction of the three-phase asynchronous motor in the equipment to be expected, thereby causing equipment damage. The conventional solution is to add a phase sequence identifier, but this increases the manufacturing cost of the device and still requires manual adjustment when the phase sequence identifier detects that the phase sequence is incorrect.

Disclosure of Invention

The embodiment of the application provides a phase sequence control method and system of a three-phase asynchronous motor, a controller and a storage medium.

The aim of the embodiment of the invention is realized by the following technical scheme:

in order to solve the above technical problems, in a first aspect, an embodiment of the present invention provides a phase sequence control method for a three-phase asynchronous motor, including: setting a Boolean variable and a trigger instruction thereof for detecting the phase sequence of the three-phase asynchronous motor; after receiving the trigger instruction, controlling the three-phase asynchronous motor to operate according to a preset mode, and judging whether the operation state is consistent with the expected state or not; if the phase sequence of the three-phase asynchronous motor is not consistent with the phase sequence, determining that the phase sequence of the three-phase asynchronous motor is incorrect, and inverting and storing the Boolean variable.

In some embodiments, after receiving the trigger instruction, controlling the three-phase asynchronous motor to operate according to a preset mode, and determining whether the operation state corresponds to the expected state includes: controlling the three-phase asynchronous motor to run for a preset distance according to a preset direction and a preset speed; acquiring the running distance of the three-phase asynchronous motor through a sensor; and judging whether the running distance is consistent with the expected distance.

In some embodiments, the acquiring, by a sensor, the running distance of the three-phase asynchronous motor includes: and acquiring the running distance of the three-phase asynchronous switch through an encoder, an origin switch, a limit switch or a position detection switch.

In some embodiments, the boolean variable and its trigger instruction configured to detect the phase sequence of the three-phase asynchronous motor comprise: setting a Boolean variable for recording whether the phase sequences are matched or not, and setting a trigger instruction for executing the phase sequence detection work of the three-phase asynchronous motor.

In some embodiments, the setting a boolean variable for recording whether the phase sequences match comprises: when the Boolean variable is true, the Boolean variable used for controlling the forward and reverse rotation of the three-phase asynchronous motor is matched with IO of the forward and reverse rotation of the motor in the controller; and when the Boolean variable is false, the Boolean variable used for controlling the forward and reverse rotation of the three-phase asynchronous motor is not matched with the IO of the forward and reverse rotation of the motor in the controller.

In some embodiments, the setting a trigger instruction for executing a phase sequence detection operation of the three-phase asynchronous motor includes: and setting the trigger action input by the user as a trigger instruction for triggering and executing the phase sequence detection work.

In some embodiments, the determining that the phase sequence of the three-phase asynchronous motor is incorrect and inverting and storing the boolean variable includes: and carrying out inverse operation on the Boolean variable for recording whether the phase sequences are matched and storing the Boolean variable so as to carry out inverse adjustment on the corresponding relation between the Boolean variable for controlling the forward and reverse rotation of the three-phase asynchronous motor and IO of the forward and reverse rotation of the motor in the controller for one time, so that the three-phase asynchronous motor operates in a normal phase sequence.

In order to solve the above technical problem, in a second aspect, an embodiment of the present invention provides a controller, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method as described in the first aspect above.

To solve the above technical problem, in a third aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the method according to the above first aspect.

In order to solve the above technical problem, in a fourth aspect, an embodiment of the present invention further provides a phase sequence control system of a three-phase asynchronous motor, including: a three-phase asynchronous motor, a drive, and a controller as described in the second aspect, the three-phase asynchronous camera being electrically connected to the drive, the drive being communicatively connected to the controller.

Compared with the prior art, the invention has the beneficial effects that: in comparison with the prior art, the embodiment of the invention provides a phase sequence control method and system, a controller and a storage medium of a three-phase asynchronous motor, wherein the method needs to preset a Boolean variable and a trigger instruction thereof for detecting the phase sequence of the three-phase asynchronous motor, after receiving the trigger instruction, the three-phase asynchronous motor is controlled to operate according to a preset mode, whether the operating state accords with an expected state is judged, if the operating state does not accord with the expected state, the phase sequence of the three-phase asynchronous motor is determined to be incorrect, the Boolean variable is inverted and stored, and the method can detect the condition that the phase sequence of the three-phase asynchronous motor is incorrect and realize self-adaptive adjustment, so that the phase sequence of the three-phase asynchronous motor operates in a correct state.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements/modules and steps, and in which the figures do not include the true to scale unless expressly indicated by the contrary reference numerals.

Fig. 1 is a schematic flow chart of a phase sequence control method of a three-phase asynchronous motor according to an embodiment of the invention;

fig. 2 is a schematic flow chart of a step S200 in the phase sequence control method of the three-phase asynchronous motor shown in fig. 1;

fig. 3 is a schematic hardware structure of a controller according to a second embodiment of the present invention;

fig. 4 is a block diagram of a phase sequence control system of a three-phase asynchronous motor according to a third embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that, if not conflicting, the various features of the embodiments of the present invention may be combined with each other, which are all within the protection scope of the present application. In addition, while functional block division is performed in a device diagram and logical order is shown in a flowchart, in some cases, the steps shown or described may be performed differently than block division in a device, or order in a flowchart. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

In order to solve the problem that the manufacturing cost of equipment is increased due to the adoption of a phase sequence identifier in the existing scheme, and meanwhile, the phase sequence identifier still needs to be manually adjusted when detecting that the phase sequence is incorrect, the embodiment of the invention provides a phase sequence control method, a system, a controller and a storage medium of a three-phase asynchronous motor.

In particular, embodiments of the present invention are further described below with reference to the accompanying drawings.

Example 1

The embodiment of the invention provides a phase sequence control method of a three-phase asynchronous motor, please refer to fig. 1, which shows a flow of the phase sequence control method of the three-phase asynchronous motor provided by the embodiment of the invention, wherein the phase sequence control method of the three-phase asynchronous motor comprises the following steps:

step S100: setting a Boolean variable and a trigger instruction thereof for detecting the phase sequence of the three-phase asynchronous motor;

in the embodiment of the invention, a step of triggering phase sequence self-adaption Boolean variable user input can be designed in a control program of the three-phase asynchronous motor to determine whether to start a step of detecting whether the phase sequence is correct or not, namely the following step S200; meanwhile, a Boolean variable for recording whether the phase sequences match can be set. Specifically, the setting is used for detecting the boolean variable of the phase sequence of the three-phase asynchronous motor and the triggering instruction thereof, and comprises the following steps: setting a Boolean variable for recording whether the phase sequences are matched or not, and setting a trigger instruction for executing the phase sequence detection work of the three-phase asynchronous motor.

Wherein the setting is used for recording whether the phase sequence matches the boolean variable, and includes: when the Boolean variable is true, the Boolean variable used for controlling the forward and reverse rotation of the three-phase asynchronous motor is matched with IO of the forward and reverse rotation of the motor in the controller; and when the Boolean variable is false, the Boolean variable used for controlling the forward and reverse rotation of the three-phase asynchronous motor is not matched with the IO of the forward and reverse rotation of the motor in the controller.

And the setting of the trigger instruction for executing the phase sequence detection work of the three-phase asynchronous motor comprises the following steps: and setting the trigger action input by the user as a trigger instruction for triggering and executing the phase sequence detection work. For example, the triggering action of the user may be received by means of a virtual key or a mechanical key, and when the user presses the key, the phase sequence detection operation may be triggered to be executed, so that the following step S200 is executed, specifically, the triggering action about the user input may be set according to the actual needs, which is not limited by the embodiments of the present invention.

Step S200: after receiving the trigger instruction, controlling the three-phase asynchronous motor to operate according to a preset mode, and judging whether the operation state is consistent with the expected state or not; if not, jumping to step S300;

in the embodiment of the invention, after receiving the trigger instruction input by the user, the phase sequence can be detected correctly, and the phase sequence is detected correctly or not by controlling the three-phase asynchronous motor to run at a low speed for a certain distance according to a certain direction and detecting whether the running distance accords with the expected mode after running. Specifically, please refer to fig. 2, which illustrates a sub-flow of step S200 in the phase sequence control method of the three-phase asynchronous motor illustrated in fig. 1, wherein after receiving the trigger command, the three-phase asynchronous motor is controlled to operate according to a preset manner, and whether the operation state corresponds to the expected state is determined, which includes:

step S210: controlling the three-phase asynchronous motor to run for a preset distance according to a preset direction and a preset speed;

firstly, the three-phase asynchronous motor needs to be controlled to run for a certain distance according to a preset direction and a preset speed. Preferably, the preset speed selects a low-speed mode to avoid damaging the three-phase asynchronous motor or equipment carrying the three-phase asynchronous motor, for example, the preset speed can be set to be 10 mm/s-50 mm/s, and the preset speed can be specifically set according to actual needs; in addition, the rotation direction of the three-phase asynchronous motor needs to be preset, for example, the rotation direction can be set to be clockwise or anticlockwise, and the rotation direction can be specifically adjusted according to actual needs; meanwhile, a certain distance for running the three-phase asynchronous motor is required to be set for judging whether the motor runs correctly, and for example, the preset distance can be set to be 2-5 mm.

Step S220: acquiring the running distance of the three-phase asynchronous motor through a sensor;

and then, the running distance of the three-phase asynchronous motor can be acquired through various angular displacement sensors so as to judge whether the three-phase asynchronous motor runs along the correct rotation direction in the correct phase sequence, wherein the current various angular displacement sensors such as encoders contain the information of the rotation direction when acquiring the running distance, so that the three-phase asynchronous motor can be judged directly through whether the acquired running distance accords with the expected running distance. Specifically, the acquiring, by a sensor, the running distance of the three-phase asynchronous motor includes: and acquiring the running distance of the three-phase asynchronous switch through an encoder, an origin switch, a limit switch or a position detection switch.

Step S230: and judging whether the running distance is consistent with the expected distance.

Finally, after the running distance is obtained, judging whether the running distance is consistent with the expected distance, if not, judging that the phase sequence is incorrect, and giving a user prompt and executing the following step S300; and if the phase sequence of the three-phase asynchronous motor is consistent with the expected distance, the phase sequence of the three-phase asynchronous motor is correct, and the phase sequence detection and control program is adopted. The expected distance is generally the same as the value of the preset distance, and the rotation direction is consistent with the time sequence of the Boolean variable.

Step S300: and determining that the phase sequence of the three-phase asynchronous motor is incorrect, and inverting and storing the Boolean variable.

Specifically, the determining that the phase sequence of the three-phase asynchronous motor is incorrect, inverting and storing the boolean variable includes: and carrying out inverse operation on the Boolean variable for recording whether the phase sequences are matched and storing the Boolean variable so as to carry out inverse adjustment on the corresponding relation between the Boolean variable for controlling the forward and reverse rotation of the three-phase asynchronous motor and IO of the forward and reverse rotation of the motor in the controller for one time, so that the three-phase asynchronous motor operates in a normal phase sequence. In the embodiment of the invention, when the phase sequence of the three-phase asynchronous motor is determined to be incorrect, that is, when the Boolean variable used for controlling the forward and reverse rotation of the three-phase asynchronous motor is determined to be unmatched with the IO of the forward and reverse rotation of the motor in the controller, the Boolean variable which records whether the phase sequence is matched is required to be subjected to reverse operation, that is, the Boolean variable is subjected to reverse rotation, so that the two variables are matched, and the three-phase asynchronous motor can operate according to expectations. Meanwhile, after the boolean variable is subjected to the inverse operation, the inverted boolean variable is also required to be stored, and the phase sequence of the motor after self-adaptive adjustment is saved, so that when other electronic components are replaced by subsequent equipment and the motor is not replaced, the stored inverted boolean variable can be directly fetched, and the electronic components can be controlled to move according to the correct phase sequence after the phase sequence self-adaptive adjustment. Generally, the device can enable the motors on the subsequent devices to operate according to the normal phase sequence by performing the self-adaptive adjustment once through the steps S100 to S300, and if the motors are replaced, the steps S100 to S300 are re-performed to detect the phase sequence of the new motors, and the self-adaptive adjustment is performed when the phase sequence is incorrect.

The phase sequence control method of the three-phase asynchronous motor provided by the embodiment of the invention can detect the condition that the phase sequence of the three-phase asynchronous motor is incorrect and realize self-adaptive adjustment, so that the phase sequence of the three-phase asynchronous motor operates in a correct state.

Example two

The embodiment of the present invention further provides a controller 10, please refer to fig. 3, which illustrates a hardware structure of the controller 10 capable of executing the phase sequence control method of the three-phase asynchronous motor described in fig. 1 to 2.

The controller 10 includes: at least one processor 11; and a memory 12 communicatively coupled to the at least one processor 11, one processor 11 being illustrated in fig. 3. The memory 12 stores instructions executable by the at least one processor 11 to enable the at least one processor 11 to perform the phase sequence control method of the three-phase asynchronous motor described above with reference to fig. 1 to 2. The processor 11 and the memory 12 may be connected by a bus or otherwise, for example in fig. 3.

The memory 12 is used as a non-volatile computer readable storage medium, and may be used to store a non-volatile software program, a non-volatile computer executable program, and modules, such as program instructions/modules corresponding to the phase sequence control method of the three-phase asynchronous motor in the embodiment of the present application, for example, each of the modules shown in fig. 1 to 2. The processor 11 executes various functional applications of the controller and data processing by running nonvolatile software programs, instructions and modules stored in the memory 12, i.e., implements the phase sequence control method of the three-phase asynchronous motor of the above-described method embodiment.

The memory 12 may include a storage program area that may store an operating system, at least one application program required for functions, and a storage data area; the storage data area may store data created according to the use of a phase sequence control device of the three-phase asynchronous motor, etc. In addition, memory 12 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 12 optionally includes a memory remotely located with respect to processor 11, which may be connected to the phase sequence control of the three-phase asynchronous motor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The one or more modules are stored in the memory 12 and when executed by the one or more processors 11 perform the phase sequence control method of the three-phase asynchronous motor in any of the method embodiments described above, for example, performing the method steps of fig. 1-2 described above.

The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be found in the methods provided in the embodiments of the present application.

Embodiments of the present application also provide a non-transitory computer-readable storage medium storing computer-executable instructions that are executed by one or more processors, for example, to perform the method steps of fig. 1-2 described above.

The present application also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the phase sequence control method of a three-phase asynchronous motor in any of the method embodiments described above, for example, to perform the method steps of fig. 1 to 2 described above.

Example III

An embodiment of the present invention provides a phase sequence control system 100 of a three-phase asynchronous motor, please refer to fig. 4, which shows a structural block diagram of the phase sequence control system 100 of the three-phase asynchronous motor provided by the embodiment of the present invention, where the phase sequence control system 100 of the three-phase asynchronous motor includes: the three-phase asynchronous motor 20, the driver 30, and the controller 10 as described in embodiment two, the three-phase asynchronous camera 20 is electrically connected with the driver 30, and the driver 30 is communicatively connected with the controller 10. Wherein,

the controller 10 may be a device, module or unit with computing power and storage power, such as a micro-control unit (also called a single-chip microcomputer/single-chip microcomputer, microcontroller Unit, MCU), a digital signal processing unit (Digital Signal Process, DSP), a microprocessor (also called a memory protection unit, microprocessor Unit, MPU), etc. The controller 10 can also control the rotation speed, the rotation direction, etc. of the three-phase asynchronous motor 20, and the controller 10 can write the phase sequence control method of the three-phase asynchronous motor provided in the first embodiment into the three-phase asynchronous motor by means of programming, execute a corresponding program, and realize control such as phase sequence detection and adjustment of the three-phase asynchronous camera 20.

The three-phase asynchronous motor 20 performs a rotation action by taking the connected three-phase alternating current power supply as power, and the three-phase asynchronous motor 20 is selected according to a control instruction issued by the controller 10, and the rotation direction, rotation speed and the like of the three-phase asynchronous motor 20 can be set by the controller 10, specifically according to actual needs. When the phase sequence of the three-phase asynchronous motor 20 in the embodiment of the invention is connected with an error, the controller 10 can detect an abnormal state of incorrect phase sequence and adjust corresponding IO of forward and reverse rotation of the motor in the controller in a software control mode to correct the incorrect phase sequence.

The driver 30 is a device capable of converting a control command outputted from the controller 10 into a driving command executable by the three-phase asynchronous motor 20, and is typically an actuator capable of converting an electric pulse into an angular displacement.

The embodiment of the invention provides a phase sequence control method and system, a controller and a storage medium of a three-phase asynchronous motor, wherein the method needs to preset a Boolean variable and a trigger instruction thereof for detecting the phase sequence of the three-phase asynchronous motor, after receiving the trigger instruction, the three-phase asynchronous motor is controlled to operate according to a preset mode, whether the operating state accords with an expected state is judged, if the operating state does not accord with the expected state, the phase sequence of the three-phase asynchronous motor is determined to be incorrect, the Boolean variable is inverted and stored, and the method can detect the condition that the phase sequence of the three-phase asynchronous motor is incorrect and realize self-adaptive adjustment, so that the phase sequence of the three-phase asynchronous motor operates in a correct state.

It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

From the above description of embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus a general purpose hardware platform, or may be implemented by hardware. Those skilled in the art will appreciate that all or part of the processes implementing the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the program may include processes of the embodiments of the methods described above when executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in details for the sake of brevity; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. The phase sequence control method of the three-phase asynchronous motor is characterized by comprising the following steps of:

setting a Boolean variable and a trigger instruction thereof for detecting the phase sequence of the three-phase asynchronous motor;

after receiving the trigger instruction, controlling the three-phase asynchronous motor to operate according to a preset mode, and judging whether the operation state is consistent with the expected state or not;

if the phase sequence of the three-phase asynchronous motor is not consistent with the phase sequence, determining that the phase sequence of the three-phase asynchronous motor is incorrect, and inverting and storing the Boolean variable.

2. The phase sequence control method according to claim 1, wherein,

after receiving the trigger instruction, controlling the three-phase asynchronous motor to operate according to a preset mode, and judging whether the operation state is consistent with the expected state or not, wherein the method comprises the following steps:

controlling the three-phase asynchronous motor to run for a preset distance according to a preset direction and a preset speed;

acquiring the running distance of the three-phase asynchronous motor through a sensor;

and judging whether the running distance is consistent with the expected distance.

3. The phase sequence control method according to claim 2, wherein,

the operation distance of the three-phase asynchronous motor is collected through a sensor, and the three-phase asynchronous motor comprises:

and acquiring the running distance of the three-phase asynchronous switch through an encoder, an origin switch, a limit switch or a position detection switch.

4. A phase sequence control method according to any one of claims 1 to 3, wherein,

the setting is used for detecting the Boolean variable of the phase sequence of the three-phase asynchronous motor and a triggering instruction thereof, and comprises the following steps:

setting a Boolean variable for recording whether the phase sequences are matched or not, and setting a trigger instruction for executing the phase sequence detection work of the three-phase asynchronous motor.

5. The phase sequence control method according to claim 4, wherein,

the setting a boolean variable for recording whether the phase sequences match, comprising:

when the Boolean variable is true, the Boolean variable used for controlling the forward and reverse rotation of the three-phase asynchronous motor is matched with IO of the forward and reverse rotation of the motor in the controller;

and when the Boolean variable is false, the Boolean variable used for controlling the forward and reverse rotation of the three-phase asynchronous motor is not matched with the IO of the forward and reverse rotation of the motor in the controller.

6. The phase sequence control method according to claim 4, wherein,

the setting of the trigger instruction for executing the phase sequence detection work of the three-phase asynchronous motor comprises the following steps:

and setting the trigger action input by the user as a trigger instruction for triggering and executing the phase sequence detection work.

7. The phase sequence control method according to claim 5, wherein,

the step of determining that the phase sequence of the three-phase asynchronous motor is incorrect, and inverting and storing the Boolean variable comprises the following steps:

and carrying out inverse operation on the Boolean variable for recording whether the phase sequences are matched and storing the Boolean variable so as to carry out inverse adjustment on the corresponding relation between the Boolean variable for controlling the forward and reverse rotation of the three-phase asynchronous motor and IO of the forward and reverse rotation of the motor in the controller for one time, so that the three-phase asynchronous motor operates in a normal phase sequence.

8. A controller, comprising:

at least one processor; the method comprises the steps of,

a memory communicatively coupled to the at least one processor; wherein,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.

9. A computer readable storage medium storing computer executable instructions for causing a computer to perform the method of any one of claims 1-7.

10. A phase sequence control system for a three-phase asynchronous motor, comprising:

a three-phase asynchronous motor, a drive, and the controller of claim 8, the three-phase asynchronous camera being electrically connected to the drive, the drive being communicatively connected to the controller.