WO2023115861A1

WO2023115861A1 - Method and apparatus for controlling switched reluctance electric motor, and cooking device and storage medium

Info

Publication number: WO2023115861A1
Application number: PCT/CN2022/100706
Authority: WO
Inventors: 王琛振; 肖阳作; 戴豪
Original assignee: 莱克电气股份有限公司; 江苏莱克智能电器有限公司; 莱克电气绿能科技(苏州)有限公司
Priority date: 2021-12-21
Filing date: 2022-06-23
Publication date: 2023-06-29
Also published as: CN116317811A

Abstract

Provided are a method and apparatus for controlling a switched reluctance electric motor, and a cooking device and a storage medium. The method comprises: when it is detected that a switched reluctance electric motor starts a target rotation speed, starting timing, and acquiring a first timing time; when the first timing time is greater than a commutation time corresponding to the target rotation speed and a commutation signal is detected, determining a commutation position of the switched reluctance electric motor according to the commutation signal; turning on a corresponding target phase according to the commutation position, restarting timing, and acquiring a second timing time; and when the second timing time reaches a set time, turning off a first lower-bridge switch corresponding to the phase before commutation, so as to complete the commutation of the electric motor under low-speed operation. The turn-off time of a lower-bridge switch of an original phase is delayed during a commutation process, that is, the turn-on time of the original phase is prolonged, such that a current change tends to smooth, thereby reducing the commutation noise caused by current mutation during low-speed commutation of an electric motor, without causing the torque of the electric motor to be insufficient.

Description

Switched reluctance motor control method, device, cooking device and storage medium

technical field

The present application relates to the technical field of motor control, in particular to a control method, device, cooking equipment and storage medium of a switched reluctance motor.

Background technique

The switched reluctance motor is a new type of speed-regulating motor with a simple and sturdy structure. It has a wide speed range and high system reliability. In the traditional technology, the drive circuit of the switched reluctance motor usually includes multiple upper-bridge IGBTs (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) and multiple lower-bridge IGBTs. The program controls the motor by controlling the conduction of these multiple IGBTs. run. When the motor rotates, the upper and lower bridges of the original motor phase are usually closed first, and then the upper and lower bridges of the replaced motor phase are opened, so that the original motor phase is closed and the replaced motor phase is turned on to control the rotation of the motor.

However, due to the sudden change of the current at the moment of commutation, an impact is generated on the coil, which easily generates relatively large commutation noise. At present, when the motor is commutating normally, the commutation is generally performed by controlling the duty ratio to reduce commutation noise. For example, when the current commutation is about to end, reduce the duty cycle so that the current decreases slowly.

However, the current commutation method easily leads to insufficient motor torque, so that the motor cannot drive the corresponding equipment to work normally.

Contents of the invention

Based on this, it is necessary to provide a control method, device, cooking equipment and storage medium of a switched reluctance motor capable of reducing low-speed commutation noise to address the above-mentioned problem of high noise during low-speed commutation.

A method for controlling a switched reluctance motor, the method comprising:

When it is detected that the switched reluctance motor enters the target speed, start timing, and obtain the first timing time;

When the first timing time is greater than the commutation time corresponding to the target speed and a commutation signal is detected, determine the commutation position of the switched reluctance motor according to the commutation signal;

Turn on the corresponding target phase according to the commutation position, and restart timing to obtain a second timing time;

When the second counting time reaches the set time, close the corresponding first lower bridge switch before the phase change, the set time is less than the phase change time, the phase before the phase change and the first coil Correspondingly, both ends of the first coil are respectively connected to the first upper bridge switch and the first lower bridge switch, and the first lower bridge switch is grounded.

In one of the embodiments, when the second counting time reaches the set time, the method further includes: using the second counting time as the first counting time, returning to execute when the first counting time A step greater than the commutation time corresponding to the target speed.

In one of the embodiments, the method further includes: when the first timing time is not greater than the commutation time corresponding to the target speed and no commutation signal is detected, continuously timing and detecting the commutation signal.

In one of the embodiments, the determining the commutation position of the switched reluctance motor according to the commutation signal includes: obtaining the state of the commutation signal; The corresponding relationship between the phases, determine the target phase corresponding to the commutation signal; determine the position of the target phase corresponding to the commutation signal as the commutation position of the switched reluctance motor.

In one of the embodiments, the first upper bridge switch is a switching transistor, and when the phase commutation signal is detected, the method further includes: when the phase commutation signal is detected, turning off the first upper bridge switch.

In one of the embodiments, the target phase corresponds to the target coil, and the two ends of the target coil are respectively connected to the target upper bridge switch and the target lower bridge switch, and the target lower bridge switch is grounded; Turning on the corresponding target phase includes: turning on the target upper bridge switch and the target lower bridge switch corresponding to the target according to the phase commutation position.

A control device for a switched reluctance motor, the device comprising:

The first timing time acquisition module is used to start timing and acquire the first timing time when it is detected that the switched reluctance motor enters the target speed;

A commutation position determination module, configured to determine the commutation of the switched reluctance motor according to the commutation signal when the first timing time is greater than the commutation time corresponding to the target speed and a commutation signal is detected Location;

The phase commutation module is used to turn on the corresponding target phase according to the phase commutation position, restart the timing, and obtain the second timing time; when the second timing time reaches the set time, close the corresponding target phase before the phase commutation The first lower bridge switch, the setting time is less than the phase change time, the phase before the phase change corresponds to the first coil, and the two ends of the first coil are respectively connected to the first upper bridge switch and the A first lower bridge switch, the first lower bridge switch is grounded.

A cooking device includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

A computer program product, including a computer program, which implements the steps of the above method when executed by a processor.

The control method, device, cooking equipment, and storage medium of the above-mentioned switched reluctance motor, when it is detected that the switched reluctance motor enters the target speed, start timing, obtain the first timing time, and when the first timing time is greater than the commutation time corresponding to the target speed Time, and when the commutation signal is detected, the commutation position of the switched reluctance motor is determined according to the commutation signal, so that the corresponding target phase is turned on according to the commutation position, and the timing is restarted to obtain the second timing time. When the second When the timing time reaches the set time, close the corresponding first lower bridge switch before the commutation, wherein the set time is less than the commutation time, so as to complete the commutation of the motor at low speed. Since this embodiment delays the turn-off time of the original phase during the commutation process, that is, prolongs the turn-on time of the original phase, so that the current change tends to be smooth, and solves the commutation problem caused by the sudden change of the current when the motor is commutating at a low speed. The problem of phase noise is eliminated, and the influence of blade overshoot is reduced, so the motor torque will not be insufficient, so that the corresponding equipment can be driven to work normally.

Description of drawings

Fig. 1 is a schematic flow chart of a control method for a switched reluctance motor in an embodiment;

Fig. 2 is a schematic flow chart of the step of determining the commutation position in an embodiment;

FIG. 3A is a schematic structural diagram of a drive circuit corresponding to commutation in an embodiment;

FIG. 3B is a schematic structural diagram of a drive circuit corresponding to commutation in an embodiment;

Fig. 4 is a schematic flow chart of a control method for a switched reluctance motor in another embodiment;

Fig. 5 is a structural block diagram of a control device for a switched reluctance motor in an embodiment;

Fig. 6 is an internal structure diagram of a cooking device in one embodiment.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

Switched reluctance motor is a new type of speed control motor, which is the latest generation of speed control system following frequency conversion speed control system and brushless DC motor speed control system. The complete system mainly consists of motor entity, power converter, controller and position detector. The controller contains the power converter and control circuit, while the rotor position detector is installed at one end of the motor. Because in the traditional low-speed commutation (for example, when the motor rotates at 40RPM), there will be obvious abnormal sound, and it will cause damage to the device in the long run.

Based on this, the present application provides a control method of a switched reluctance motor capable of reducing low-speed commutation noise, as shown in FIG. 1 , taking the method applied to a controller in a speed control system as an example for illustration, including the following step:

Step 110, start timing when it is detected that the switched reluctance motor enters the target speed, and obtain a first timing time.

Wherein, the target speed refers to the speed of the motor below 40PRM. Because the traditional commutation method will lead to the problems of large noise and insufficient motor torque during low-speed commutation, in this embodiment, the speed of the switched reluctance motor is monitored in real time, and when the speed reaches the target speed, the application is adopted. The commutation control is carried out by the method, thereby reducing the noise problem of low-speed commutation, and avoiding insufficient motor torque. Specifically, when it is detected that the switched reluctance motor enters the target speed, timing is started, and a corresponding timing time is acquired. In this embodiment, in order to distinguish the counting time of different subsequent stages, the counting time here is defined as the first counting time. Specifically, timing can be performed in the TIM1 clock interrupt.

Step 120, when the first timing time is greater than the commutation time corresponding to the target speed and a commutation signal is detected, determine the commutation position of the switched reluctance motor according to the commutation signal.

When the motor is rotating, the energizing direction of the coil inside the motor needs to be changed, so as to achieve the purpose of continuous rotation of the motor. The commutation signal refers to the photoelectric signals of different states generated during the rotation of the motor, and the controller performs corresponding commutation processing based on the photoelectric signals of different states. The commutation time corresponds to the target speed. It can be understood that the corresponding commutation time is different at different speeds of the motor. Specifically, in this embodiment, the commutation time is the theoretical time of two adjacent external interruptions at the target speed, that is, the theoretical interval between two commutation signals at the target speed. The commutation position is the specific position that needs commutation determined based on the commutation signal, that is, the target phase that needs to be turned on is determined based on the energization direction, and the target phase is the phase that needs to be turned on based on the commutation signal to change Power direction. In this embodiment, when it is detected that the first timing time is greater than the commutation time corresponding to the target speed and a commutation signal is detected, the commutation position of the switched reluctance motor is determined according to the commutation signal.

Step 130, conducting the corresponding target phase according to the commutation position, restarting timing, and obtaining a second timing time.

In this embodiment, after the commutation position is determined through the above steps, the commutation process can be started. Specifically, according to the above determined commutation position, the corresponding target phase is turned on. Since the target phase is the phase that needs to be turned on based on the commutation signal to change the direction of conduction, in this embodiment, based on the commutation signal, the By changing the target phase of the energization direction, and clearing the clock to start counting again, to obtain the second counting time.

Step 140, when the second counting time reaches the set time, close the corresponding first lower bridge switch before commutation.

Wherein, the phase before commutation is the phase that is turned on before changing the energization direction, that is, the phase that is turned on when the motor is running normally before the commutation signal is detected. The phase before commutation corresponds to the first coil, and the two ends of the first coil are respectively connected to the first upper bridge switch and the first lower bridge switch, and the first lower bridge switch is grounded.

Specifically, when it is detected that the second counting time reaches the set time, the corresponding first lower bridge switch before the commutation is turned off, that is, the closing of the first lower bridge switch before the commutation is delayed by the set time Time, so that the current decreases slowly, so as to complete a commutation process of the motor at low speed. Wherein, the setting time is less than the commutation time.

In the control method of the above switched reluctance motor, when it is detected that the switched reluctance motor enters the target speed, timing is started, and the first timing time is obtained. When the first timing time is greater than the commutation time corresponding to the target speed, and the commutation time is detected signal, the commutation position of the switched reluctance motor is determined according to the commutation signal, so that the corresponding target phase is turned on according to the commutation position, and the timing is restarted to obtain the second timing time. When the second timing time reaches the set time , then close the corresponding first lower bridge switch before commutation, so as to complete the commutation of the motor at low speed. Because this embodiment delays the turn-off time of the lower bridge switch of the original phase during the commutation process, that is, prolongs the conduction time of the original phase, so that the current change tends to be smooth during the commutation process, thereby reducing the motor's low-speed commutation. The commutation noise caused by the sudden change of current during the phase phase reduces the impact of blade overshoot, so it will not cause insufficient motor torque, so that the motor can drive the corresponding equipment to work normally.

In one embodiment, as shown in FIG. 2, determining the commutation position of the switched reluctance motor according to the commutation signal specifically includes the following steps:

Step 210, acquiring the state of the commutation signal.

Wherein, the state of the commutation signal refers to the state of the high and low levels of the photoelectric signal generated during the operation of the motor. Usually, the motor has two photoelectric signals. As the motor rotates, it will generate high and low levels. If 1 represents high level and 0 represents low level, then the photoelectric signal of the motor has a total of 00, 01, 10 and 11 during operation. There are several states, and each state corresponds to a phase that needs to be turned on. Therefore, in this embodiment, by detecting the phase commutation signal and obtaining the state of the phase commutation signal, the corresponding target phase that needs to be turned on can be determined through subsequent steps to perform the phase commutation operation.

Step 220, according to the corresponding relationship between the state of the preset commutation signal and the phase that needs to be turned on, determine the target phase corresponding to the commutation signal.

Wherein, the target phase refers to the phase corresponding to the commutation signal that needs to be turned on. In this embodiment, the corresponding relationship between each state of the commutation signal and the corresponding phase that needs to be turned on can be set in advance. For example, when the photoelectric signal is in the 00 state, the corresponding need to turn on phase A is 01. In state 10, phase B needs to be turned on; in state 10, phase C needs to be turned on; in state 11, phase D needs to be turned on. Therefore, in this embodiment, when the state of the commutation signal is obtained, the target phase corresponding to the commutation signal can be determined according to the preset correspondence between the state of the commutation signal and the phase to be turned on. For example, if the acquired state of the commutation signal is 10, based on the above correspondence, it can be known that phase C needs to be turned on in state 10, and it can be determined that the target phase corresponding to the commutation signal is phase C.

In step 230, the position of the target phase corresponding to the commutation signal is determined as the commutation position of the switched reluctance motor.

Specifically, the position of the target phase corresponding to the determined commutation signal is determined as the commutation position of the switched reluctance motor, so that commutation can be performed based on the commutation position, so that the motor can continue to run.

In the above embodiment, by obtaining the state of the commutation signal, and according to the preset correspondence between the state of the commutation signal and the phase that needs to be turned on, the target phase corresponding to the commutation signal is determined, and then the corresponding phase of the commutation signal is The position of the target phase of is determined as the commutation position of the switched reluctance motor. Therefore, commutation can be performed based on the commutation position, so that the motor can continue to run.

In one embodiment, the commutation process of the switched reluctance motor is further described below in conjunction with the specific drive circuit structure of the switched reluctance motor. Specifically, as shown in FIG. 3A, the corresponding circuit structure has two upper bridge IGBTs and four lower bridges. IGBT, wherein the two upper bridge IGBTs include switches Q22 and Q25, and the four lower bridge IGBTs include switches Q21, Q23, Q24 and Q26, wherein the lower bridges Q21 and Q23 share the upper bridge Q22, and the lower bridges Q24 and Q26 share the upper bridge Q25. One end of the coils QC1, QC2, QC3 and QC4 are connected to the lower bridge switches Q21, Q23, Q24 and Q26 respectively, the other ends of the lower bridge switches Q21, Q23, Q24 and Q26 are grounded, and the other ends of the coils QC1 and QC2 are connected to The other ends of the common upper bridge Q22, coils QC3 and QC4 are connected to the common upper bridge Q25. Then the operation of the motor can be controlled by controlling the turn-on and turn-off of the 6-way IGBTs.

In traditional commutation, it is necessary to turn on the upper and lower bridge IGBTs of the same channel, and turn off the IGBTs of the other channels. For example: when the A phase is turned on, the upper and lower bridges of the motor A phase are turned on by turning on the two IGBTs of Q22 and Q21, and the other IGBTs are turned off; when changing the phase, if you want to change to the B phase, first turn off The two IGBTs of Q22 and Q21 turn off the upper and lower bridges of phase A, and then turn on the two IGBTs of Q25 and Q24, so that the upper and lower bridges of phase B are turned on, thereby controlling the rotation of the motor. However, in this way, when the motor is commutating at a low speed, it will produce more obvious abnormal sound, resulting in a larger noise.

Based on this, in this embodiment, when the phase commutation signal is detected, the upper bridge IGBT of the current phase is first turned off. Since the lower bridge IGBT is in the conduction state at this time, the leakage current of the upper bridge IGBT can flow to the corresponding The lower bridge IGBT, and then turn on the corresponding target upper bridge IGBT and target lower bridge IGBT according to the above determined commutation position, and restart the timing to obtain the second timing time, and reach the set time at the second timing time When , the corresponding lower bridge IGBT before commutation is turned off, thereby prolonging the conduction time of the original phase leakage current, and making the current change tend to be smooth during the commutation process. For example, if the motor is in phase A when it is running at a low speed, the current phase is phase A, and at this time the two IGBTs Q22 and Q21 are in a conducting state. When the commutation signal is detected according to the above steps, and the commutation position is determined, if it is determined that it is necessary to switch to the B phase, the upper bridge of the A phase is first turned off, that is, Q22 is turned off, because at this time the lower bridge IGBT of the A phase, namely Q21, is Therefore, the leakage current of the coil QC1 can flow to the corresponding lower bridge Q21, so that the current change tends to be smooth during the commutation process. Then the upper bridge IGBT Q25 and the lower bridge IGBT Q24 corresponding to B are turned on, and the timing is restarted at the same time to obtain the second timing time. It can be understood that the second counting time may be counted from when the upper bridge Q22 of phase A is turned off. And when the second timing time reaches the set time for commutation, the lower bridge IGBT before commutation is turned off, that is, the lower bridge Q21 of phase A is turned off, thereby completing the commutation process.

Specifically, the setting time is less than the commutation time. In a preferred embodiment, the set time is any interval between one-third and two-thirds of the commutation time. Preferably, the setting time is half of the commutation time.

Because this embodiment prolongs the conduction time of the lower bridge of the original phase during the commutation process, so that the current change tends to be smooth, and then can reduce the commutation noise caused by the sudden change of current when the motor is commutating at a low speed, so it has better performance. Noise reduction effect, and help to prolong the service life of the device.

In one embodiment, for the circuit structure shown in FIG. 3B, as shown in FIG. 3B, its corresponding circuit structure has four upper bridge IGBTs and four lower bridge IGBTs, wherein the four upper bridge IGBTs include switches Q31, Q33, Q35 and Q37, the four-way lower bridge IGBT includes switches Q32, Q34, Q36 and Q38, one end of the coils QC1, QC2, QC3 and QC4 are respectively connected to the lower bridge switches Q32, Q34, Q36 and Q38, and the coils QC1, QC2 and QC3 and the other end of QC4 are respectively connected to the upper bridge switches Q31, Q33, Q35 and Q37 correspondingly. The other ends of the lower bridge switches Q32, Q34, Q36 and Q38 are grounded. In this structure, each phase has an independent upper-bridge switch and lower-bridge switch, and the operation of the motor can be controlled by controlling the turn-on and turn-off of the 8-way IGBT. For example, if the motor is in phase A when it is running at a low speed, the current phase is phase A, and the two IGBTs Q31 and Q32 are in a conducting state at this time. When the commutation signal is detected according to the above steps, and the commutation position is determined, if it is determined that it is necessary to switch to the B phase, the upper bridge of the A phase is first turned off, that is, Q31 is turned off, because at this time the lower bridge IGBT of the A phase, that is, Q32 is Therefore, the leakage current of the coil QC1 can flow to the corresponding lower bridge Q32, so that the current change tends to be smooth during the commutation process. Then turn on the upper bridge IGBT Q35 and the lower bridge IGBT Q36 corresponding to B, and start timing again at the same time, so as to obtain the second timing time. It can be understood that the second counting time may be counted from when the upper bridge Q31 of phase A is turned off. And when the second timing time reaches the set time, the lower bridge IGBT before the phase change is turned off, that is, the lower bridge Q32 of the A phase is turned off. Because this embodiment prolongs the conduction time of the lower bridge of the original phase during the commutation process, so that the current change tends to be smooth, and then can reduce the commutation noise caused by the sudden change of current when the motor is commutating at a low speed, so it has better performance. Noise reduction effect, and help to prolong the service life of the device.

In one embodiment, as shown in Figure 4, the above method of the present application is further described below, which may specifically include the following steps:

Step 401, the motor starts running.

Step 402, detecting the rotation speed of the motor.

Step 403, judge whether to enter the target speed, if yes, go to step 404, otherwise return to step 402.

Step 404, start timing if it is detected that the motor enters the target speed.

Step 405, acquire the first counting time, and detect the commutation signal.

Step 406, judge whether the first counting time is greater than the commutation time corresponding to the target speed, if yes, go to step 407, otherwise return to step 405.

Step 407, judge whether a commutation signal is detected, if so, go to step 408, otherwise return to step 405.

Step 408, according to the commutation signal, turn off the upper bridge IGBT of the current phase, and determine the commutation position.

Step 409 , conducting the corresponding target phase according to the commutation position, and restarting the timing.

Step 410, acquiring the second timing time.

Step 411 , judging whether the second counting time reaches the set time, if so, proceed to step 412 , otherwise return to step 410 .

Step 412, when the second counting time reaches the set time, turn off the corresponding lower bridge IGBT before commutation. And the second timing time is used as the first timing time, and the execution returns to step 406, so that the motor continues to work.

Wherein, for the specific phase commutation process (that is, step 409 to step 412), reference may be made to the above-mentioned embodiment shown in FIG. 3 , which will not be repeated in this embodiment.

It should be understood that although the various steps in the flow charts of FIGS. 1-4 are shown sequentially as indicated by the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in FIGS. 1-4 may include multiple steps or stages. These steps or stages are not necessarily performed at the same time, but may be performed at different times. The steps or stages The execution sequence is not necessarily performed sequentially, but may be performed alternately or alternately with other steps or at least a part of steps or stages in other steps.

In one embodiment, as shown in FIG. 5 , a control device for a switched reluctance motor is provided, including: a first timing time acquisition module 502, a commutation position determination module 504, and a commutation module 506, wherein:

The first timing time acquisition module 502 is configured to start timing and acquire the first timing time when it is detected that the switched reluctance motor enters the target speed;

A commutation position determination module 504, configured to determine the commutation position of the switched reluctance motor according to the commutation signal when the first timing time is greater than the commutation time corresponding to the target speed and a commutation signal is detected. phase position;

The phase commutation module 506 is used to turn on the corresponding target phase according to the phase commutation position, and restart the timing to obtain the second timing time; when the second timing time reaches the set time, turn off the phase before the phase commutation The corresponding first lower bridge switch, the set time is less than the phase change time, the phase before the phase change corresponds to the first coil, and the two ends of the first coil are respectively connected to the first upper bridge switch and the The first lower bridge switch is described, and the first lower bridge switch is grounded.

In one embodiment, the phase commutation position determination module is further configured to: use the second counting time as the first counting time after closing the phase before commutation, and return to execute when the first counting time is greater than The step of commutation time corresponding to the target speed.

In one embodiment, the device further includes a commutation signal detection module, configured to continue counting and Detect commutation signal.

In one embodiment, the commutation position determination module is specifically configured to: obtain the state of the commutation signal; determine the commutation signal according to the corresponding relationship between the state of the pre-set commutation signal and the phase that needs to be turned on The corresponding target phase: determining the position of the target phase corresponding to the commutation signal as the commutation position of the switched reluctance motor.

In one embodiment, the first upper bridge switch is a switching transistor, and the phase commutation module is further configured to: when a phase commutation signal is detected, turn off the first upper bridge switch.

In one embodiment, the target phase corresponds to the target coil, and the two ends of the target coil are respectively connected to the target upper bridge switch and the target lower bridge switch, and the target lower bridge switch is grounded; : Turn on the target upper bridge switch and target lower bridge switch corresponding to the target according to the commutation position.

For the specific definition of the control device of the switched reluctance motor, please refer to the above definition of the control method of the switched reluctance motor, which will not be repeated here. Each module in the control device of the above-mentioned switched reluctance motor can be fully or partially realized by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.

In one embodiment, a cooking device is provided, and the internal structure diagram of the cooking device may be as shown in FIG. 6 . The cooking device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Wherein, the processor of the cooking device is used to provide calculation and control capabilities. The storage of the cooking device includes a non-volatile storage medium and an internal storage. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface of the cooking device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for controlling the switched reluctance motor is realized. The display screen of the cooking device may be a liquid crystal display or an electronic ink display, and the input device of the cooking device may be a touch layer covered on the display screen, or a button, a trackball or a touch pad provided on the casing of the cooking device , and can also be an external keyboard, touchpad, or mouse.

Those skilled in the art can understand that the structure shown in Figure 6 is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation to the cooking equipment on which the solution of the application is applied. The specific cooking equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components. Specifically, the cooking equipment includes but is not limited to a coffee machine, a breakfast machine, a wall breaking machine, a bread machine, a cooking machine, and a kitchen machine.

In one embodiment, a cooking device is provided, including a memory and a processor, a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:

Conducting the corresponding target phase according to the commutation position, and restarting timing to obtain a second timing time;

In one embodiment, when the processor executes the computer program, the following steps are further implemented: when the second counting time reaches the set time, use the second counting time as the first counting time, return to execute when the first counting time A step in which the timing time is greater than the commutation time corresponding to the target speed.

In one embodiment, when the processor executes the computer program, the following steps are further implemented: when the first counting time is not greater than the commutation time corresponding to the target speed and no commutation signal is detected, continue timing and detect commutation phase signal.

In one embodiment, when the processor executes the computer program, the following steps are also implemented: acquiring the state of the phase commutation signal; A target phase corresponding to the phase signal; determining the target phase corresponding to the commutation signal as the commutation position of the switched reluctance motor.

In one embodiment, the first upper bridge switch is a switching transistor, and when the phase commutation signal is detected, the method further includes: when the phase commutation signal is detected, turning off the first upper bridge switch.

In one embodiment, the target phase corresponds to the target coil, the two ends of the target coil are respectively connected to the target upper bridge switch and the target lower bridge switch, and the target lower bridge switch is grounded; Turning on the corresponding target phase includes: turning on the target upper bridge switch and the target lower bridge switch corresponding to the target according to the phase commutation position.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: when the second counting time reaches the set time, use the second counting time as the first counting time, return to execute when the second counting time A step in which the timing time is greater than the commutation time corresponding to the target speed.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: when the first timing time is not greater than the commutation time corresponding to the target speed and no commutation signal is detected, continue to count and detect commutation signal.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: acquiring the state of the phase commutation signal; determining the A target phase corresponding to the commutation signal; determining the target phase corresponding to the commutation signal as the commutation position of the switched reluctance motor.

In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all Information and data authorized by the user or fully authorized by all parties.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the computer programs can be stored in a non-volatile computer-readable memory In the medium, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, any references to memory, storage, database or other media used in the various embodiments provided in the present application may include at least one of non-volatile memory and volatile memory. Non-volatile memory may include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only represent several implementation modes of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

A control method for a switched reluctance motor, characterized in that the method comprises:

When it is detected that the switched reluctance motor enters the target speed, start timing, and obtain the first timing time;

When the first timing time is greater than the commutation time corresponding to the target speed and a commutation signal is detected, determine the commutation position of the switched reluctance motor according to the commutation signal;

Conducting the corresponding target phase according to the commutation position, and restarting timing to obtain a second timing time;

When the second counting time reaches the set time, close the corresponding first lower bridge switch before the phase change, the set time is less than the phase change time, the phase before the phase change and the first coil Correspondingly, both ends of the first coil are respectively connected to the first upper bridge switch and the first lower bridge switch, and the first lower bridge switch is grounded.
The method according to claim 1, wherein when the second counting time reaches the set time, the method further comprises:

Using the second counted time as the first counted time, return to the step of executing when the first counted time is greater than the commutation time corresponding to the target rotational speed.
The method according to claim 1, further comprising:

When the first counting time is not greater than the commutation time corresponding to the target speed and no commutation signal is detected, the timing is continued and the commutation signal is detected.
The method according to claim 1, wherein the determining the commutation position of the switched reluctance motor according to the commutation signal comprises:

acquiring the state of the commutation signal;

determining the target phase corresponding to the phase commutation signal according to the corresponding relationship between the state of the preset phase commutation signal and the phase that needs to be turned on;

The position of the target phase corresponding to the commutation signal is determined as the commutation position of the switched reluctance motor.
The method according to any one of claims 1 to 4, wherein the first upper bridge switch is a switching transistor, and when the commutation signal is detected, the method further includes:

When a commutation signal is detected, the first upper bridge switch is turned off.
The method according to claim 5, wherein the target phase corresponds to the target coil, the two ends of the target coil are respectively connected to the target upper bridge switch and the target lower bridge switch, and the target lower bridge switch is grounded; Conducting the corresponding target phase according to the commutation position includes:

The target upper bridge switch and the target lower bridge switch corresponding to the target are turned on according to the commutation position.
A control device for a switched reluctance motor, characterized in that the device comprises:

The first timing time acquisition module is used to start timing and acquire the first timing time when it is detected that the switched reluctance motor enters the target speed;

A commutation position determination module, configured to determine the commutation of the switched reluctance motor according to the commutation signal when the first timing time is greater than the commutation time corresponding to the target speed and a commutation signal is detected Location;

The phase commutation module is used to turn on the corresponding target phase according to the phase commutation position, restart the timing, and obtain the second timing time; when the second timing time reaches the set time, close the corresponding target phase before the phase commutation The first lower bridge switch, the setting time is less than the phase change time, the phase before the phase change corresponds to the first coil, and the two ends of the first coil are respectively connected to the first upper bridge switch and the A first lower bridge switch, the first lower bridge switch is grounded.
A cooking device, comprising a memory and a processor, the memory stores a computer program, wherein the processor implements the steps of the method according to any one of claims 1 to 6 when executing the computer program.
A computer-readable storage medium, on which a computer program is stored, wherein, when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are realized.
A computer program product, comprising a computer program, characterized in that, when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.