CN113612426A - Low-speed operation control method for switched reluctance motor and switched reluctance motor - Google Patents
Low-speed operation control method for switched reluctance motor and switched reluctance motor Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/03—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for very low speeds
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
- H02P25/092—Converters specially adapted for controlling reluctance motors
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Abstract
The invention relates to a low-speed operation control method of a switched reluctance motor and the switched reluctance motor, comprising the following steps: acquiring the real-time rotating speed of the switched reluctance motor; determining a reference current according to the real-time rotating speed and the set rotating speed; obtaining control parameters of the low-speed operation of the switched reluctance motor according to the reference current; and controlling the switched reluctance motor to operate according to the control parameters. The reference current is determined based on the real-time rotating speed and the set rotating speed of the switched reluctance motor, and the control parameter of the switched reluctance motor in low-speed operation is obtained according to the reference current, so that the switched reluctance motor is controlled in low-speed operation according to the obtained control parameter, the switched reluctance motor is controlled to stably operate in a low-speed state, and the stability and the reliability of the switched reluctance motor are improved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a low-speed operation control method of a switched reluctance motor and the switched reluctance motor.
Background
The existing switched reluctance motor has a wider speed regulation range which can generally reach 40 rpm-1200 rpm, however, due to the wide range adjustment of the switched reluctance motor, the switched reluctance motor is unstable in low-speed operation and has poor stability control due to lower power when being controlled at low speed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a low-speed operation control method of a switched reluctance motor and the switched reluctance motor aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a low-speed operation control method of a switched reluctance motor is constructed, and comprises the following steps:
acquiring the real-time rotating speed of the switched reluctance motor;
determining a reference current according to the real-time rotating speed and the set rotating speed;
obtaining control parameters of the switched reluctance motor in low-speed operation according to the reference current;
and controlling the switched reluctance motor to operate according to the control parameters.
In the method for controlling the low-speed operation of the switched reluctance motor, the determining the reference current according to the real-time rotating speed and the set rotating speed includes:
making a difference between the set rotating speed and the real-time rotating speed to obtain a difference value between the set rotating speed and the real-time rotating speed;
and calculating by adopting a preset adjusting algorithm according to the difference value between the set rotating speed and the real-time rotating speed to obtain the reference current.
In the method for controlling the low-speed operation of the switched reluctance motor, the preset adjusting algorithm is any one or more of an incremental PI adjusting algorithm, a position PI algorithm and a PID algorithm.
In the method for controlling the low-speed operation of the switched reluctance motor, the obtaining of the control parameter of the low-speed operation of the switched reluctance motor according to the reference current includes:
determining a current deviation value according to the reference current;
and determining a current upper limit value and a current lower limit value according to the current deviation value and the reference current.
In the method for controlling the low-speed operation of the switched reluctance motor, the obtaining of the control parameter of the low-speed operation of the switched reluctance motor according to the reference current includes:
and determining a reference duty ratio for controlling the switched reluctance motor according to the reference current.
In the method for controlling the low-speed operation of the switched reluctance motor, the obtaining of the control parameter of the low-speed operation of the switched reluctance motor according to the reference current includes:
and acquiring the conduction angle and the turn-off angle of each phase of the switched reluctance motor according to the reference current.
In the method for controlling the low-speed operation of the switched reluctance motor, the controlling the operation of the switched reluctance motor according to the control parameter includes:
acquiring real-time conduction current of the switched reluctance motor;
comparing the real-time conduction current with the current upper limit value and the current lower limit value;
and controlling the current on-phase of the switched reluctance motor to be switched on or controlling the current off-phase of the switched reluctance motor to be switched on according to the comparison result.
In the method for controlling the low-speed operation of the switched reluctance motor, the comparison result comprises the following steps: the real-time conduction current is larger than the current upper limit value, or the real-time conduction current is smaller than the current lower limit value.
In the method for controlling the low-speed operation of the switched reluctance motor, the step of controlling the current on-phase of the switched reluctance motor to be switched off or the current off-phase of the switched reluctance motor to be switched on according to the comparison result includes:
and if the real-time conduction current is larger than the current upper limit value, controlling the current conduction phase of the switched reluctance motor to be closed.
In the method for controlling the low-speed operation of the switched reluctance motor, the step of controlling the current on-phase of the switched reluctance motor to be switched off or the current off-phase of the switched reluctance motor to be switched on according to the comparison result includes:
and if the real-time conduction current is smaller than the current lower limit value, controlling the current closing phase of the switched reluctance motor to be conducted.
In the method for controlling the low-speed operation of the switched reluctance motor, the controlling the operation of the switched reluctance motor according to the control parameter includes:
and controlling the duty ratio of the current conducting phase of the switched reluctance motor according to the reference duty ratio.
The present invention also provides a switched reluctance motor, comprising: a detection device and a controller;
the detection device is used for detecting the rotating speed of the switched reluctance motor and outputting photoelectric switch signals;
the controller is used for executing the low-speed operation control method of the switched reluctance motor.
The implementation of the low-speed operation control method of the switched reluctance motor and the switched reluctance motor has the following beneficial effects: the method comprises the following steps: acquiring the real-time rotating speed of the switched reluctance motor; determining a reference current according to the real-time rotating speed and the set rotating speed; obtaining control parameters of the low-speed operation of the switched reluctance motor according to the reference current; and controlling the switched reluctance motor to operate according to the control parameters. The reference current is determined based on the real-time rotating speed and the set rotating speed of the switched reluctance motor, and the control parameter of the switched reluctance motor in low-speed operation is obtained according to the reference current, so that the switched reluctance motor is controlled in low-speed operation according to the obtained control parameter, the switched reluctance motor is controlled to stably operate in a low-speed state, and the stability and the reliability of the switched reluctance motor are improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic flowchart of a method for controlling low-speed operation of a switched reluctance motor according to an embodiment of the present invention;
FIG. 2 is a schematic of a current waveform for current chopping control;
FIG. 3 is a schematic of a current waveform for voltage chopping control;
FIG. 4 is a schematic diagram of current waveforms at different conduction angles;
FIG. 5 is a schematic view of current waveforms at different turn-off angles;
FIG. 6 is a schematic diagram of a motor drive circuit;
fig. 7 is a schematic diagram of relative positions and sector divisions of winding inductances.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
In order to solve the problem that the switched reluctance motor is unstable in low-speed operation, the invention provides a low-speed operation control method of the switched reluctance motor, which combines three driving modes of current chopping control, voltage chopping control and conducting position angle control, so that the switched reluctance motor can stably operate at low speed. In addition, the method can also improve the response speed of the switched reluctance motor, so that the switched reluctance motor can quickly respond to the change of the load.
Specifically, referring to fig. 1, a schematic flow chart of an alternative embodiment of the method for controlling the low-speed operation of the switched reluctance motor according to the present invention is shown. Optionally, the low-speed operation control method of the switched reluctance motor may be applied to, but not limited to, a four-phase switched reluctance motor, a six-phase switched reluctance motor, an eight-phase switched reluctance motor, and the like. For example, as shown in fig. 6, the driving circuit of the four-phase switched reluctance motor is shown. In fig. 6, A, C phases share an upper bridge (Q1), B, D phases share an upper bridge (Q5), and when the phase a needs to be opened, Q1 and Q3 are controlled to be conducted; when the C phase needs to be switched on, controlling the Q1 and the Q4 to be switched on; when the phase B needs to be switched on, controlling the conduction of Q5 and Q6; when the D phase needs to be switched on, the Q5 and the Q2 are controlled to be conducted. In fig. 6, R1 is a current detection resistor. By detecting the current flowing through R1, the on-current corresponding to the on-phase can be detected.
Specifically, as shown in fig. 1, the method for controlling the low-speed operation of the switched reluctance motor is characterized by comprising the following steps:
and S101, acquiring the real-time rotating speed of the switched reluctance motor.
Alternatively, the real-time rotational speed of the switched reluctance motor may be detected using conventional methods.
And S102, determining reference current according to the real-time rotating speed and the set rotating speed.
In some embodiments, determining the reference current based on the real-time rotational speed and the set rotational speed comprises: the set rotating speed is differed from the real-time rotating speed to obtain a difference value between the set rotating speed and the real-time rotating speed; and calculating by adopting a preset adjusting algorithm according to the difference value between the set rotating speed and the real-time rotating speed to obtain the reference current. Optionally, the preset adjusting algorithm is any one or more of an incremental PI adjusting algorithm, a position PI algorithm, and a PID algorithm. PID is a linear control algorithm that adjusts the output based on the deviation of the settings from the feedback. P means proportional (Proportion), I means Integral (Integral), and D means Differential (Differential). The PID control formula is as follows:
(1) where Kp- -proportional gain (proportionality coefficient); tt- -integral time constant; td- -a differential time constant; u (t) -output; e (t) -deviation.
Discretizing the formula (1) can obtain:
(2) in the formula (I), the compound is shown in the specification,
-an integral coefficient; kd＝KpTd-a differential coefficient; u (k) -kth output; e (k) -k deviation.
It can be seen from the equation (2), that the proportional part output is in proportional relation with the deviation, that is, when the system has the deviation, the proportional output exists, and the deviation can be quickly responded and reduced, but the pure proportional control needs the deviation to exist, and only a certain output can be maintained, so that the pure proportional control inevitably has a steady-state error, and the integral control needs to be introduced;
the existence of integral control action is related to the existence time of deviation, and as long as the system has deviation, the integral control can continuously play a role, the input deviation is integrated, the output is continuously changed, and the control action is generated to reduce the deviation. In case the integration time is sufficient, the static error can be completely eliminated, in which case the integration control action will remain unchanged. Therefore, the proportional Plus Integral (PI) controller can enable the system to have no steady-state error after the system enters a steady state, although the introduction of integral control can eliminate the steady-state error, the response speed of the system is reduced, particularly for a control object with larger inertia, better dynamic adjustment quality is difficult to obtain only by using the PI controller, the system can generate larger overshoot and oscillation, and differential control can be introduced at the moment. The differential control adjusts the output in advance according to the variation trend of the deviation, thereby quickening the response speed of the system and reducing the adjusting time, but the differential control belongs to the predictive control, and if the proportion of the differential action is too large (the WeChat coefficient is larger), the anti-jamming capability of the system is reduced.
(2) The formula is a discretization formula, and has a problem that: the product part needs to continuously accumulate the deviation and needs a larger storage space, so that the incremental formula can be derived according to the formula (1) as follows:
by adopting the formula (3), accumulation operation on deviation is not needed, the requirement on storage space can be greatly reduced, and the motor belongs to a control object with small inertia. Wherein, the input deviation is the difference between the set rotating speed and the real-time rotating speed, and the increment value of the reference current can be obtained by the following formula:
ΔIref(k)＝Kp(e(k)-e(k-1))+Kie(k) (4).
(4) in the formula,. DELTA.Iref(k) Is a reference current delta value.
(5) In the formula Iref(k) Is a reference current.
And step S103, obtaining control parameters of the low-speed operation of the switched reluctance motor according to the reference current.
In some embodiments, obtaining the control parameter for the low-speed operation of the switched reluctance motor according to the reference current comprises: determining a current deviation value according to the reference current; and determining a current upper limit value and a current lower limit value according to the current deviation value and the reference current.
Specifically, after the reference current is calculated, an allowable current deviation value is set according to the reference current, and then a current upper limit value and a current lower limit value are calculated based on the obtained current deviation value.
For example, if the calculated reference current is 1000mA, at this time, the reference current is larger, and the allowable current deviation value may be set to be correspondingly larger, and if the reference current is set to be 200mA, the upper limit value of the current is 1200mA, and the lower limit value of the current is 800 mA. If the reference current is 200mA, the reference current is smaller, and the allowable current deviation value can be set to be correspondingly smaller, for example, 50mA can be set, the upper limit value of the current is 250mA, and the lower limit value of the current is 150 mA.
In some embodiments, obtaining the control parameter for the low-speed operation of the switched reluctance motor according to the reference current comprises: and determining a reference duty ratio for controlling the switched reluctance motor according to the reference current.
It is understood that the duty ratio is used for adjusting the current rising speed, and therefore, after the reference duty ratio is calculated by the calculated reference current, the duty ratio of the switched reluctance motor can be controlled by using the calculated reference duty ratio to adjust the current rising speed. For example, when the reference current is 1000mA, the current is large, and the current rising rate can be set to be large correspondingly, for example, the reference duty cycle can be set to be 100%, that is, the opened phase is completely conducted, and at this time, the current rising speed is the highest; if the reference current is 200mA, the current is smaller, and the current rising rate also needs to be reduced, so that the duty ratio can be correspondingly reduced, for example, the duty ratio can be set to 20%, the rising speed of the current is reduced, and the current control is more accurate.
In some embodiments, obtaining the control parameter for the low-speed operation of the switched reluctance motor according to the reference current comprises: and acquiring the conduction angle and the turn-off angle of each phase of the switched reluctance motor according to the reference current.
And step S104, controlling the switched reluctance motor to operate according to the control parameters.
In some embodiments, controlling the operation of the switched reluctance motor according to the control parameter includes: acquiring real-time conduction current of a switched reluctance motor; comparing the real-time conduction current with a current upper limit value and a current lower limit value; and controlling the current on-phase of the switched reluctance motor to be switched on or controlling the current off-phase of the switched reluctance motor to be switched on according to the comparison result.
Optionally, the comparison result includes: the real-time conduction current is larger than the current upper limit value, or the real-time conduction current is smaller than the current lower limit value.
Wherein, according to the comparison result, controlling the current on-phase of the switched reluctance motor to be closed or controlling the current off-phase of the switched reluctance motor to be closed comprises: and if the real-time conduction current is larger than the current upper limit value, controlling the current conduction phase of the switched reluctance motor to be closed. Or if the real-time conduction current is smaller than the current lower limit value, controlling the current closing phase of the switched reluctance motor to be conducted.
Specifically, as shown in fig. 6, the real-time conduction current of the switched reluctance motor can be obtained by detecting the current flowing through the current detection resistor, and the real-time conduction current is respectively compared with the current upper limit value and the current lower limit value, and if the real-time conduction current is greater than the current upper limit value, the corresponding switch is controlled to be closed, so as to control the current conduction phase to be closed; as shown in fig. 6, if the current on phase is the a phase or the C phase, the Q1 is controlled to be turned off; and if the current conducting phase is the B phase or the D phase, controlling Q5 to be closed. If the real-time conduction current is smaller than the current lower limit value, controlling the corresponding switch to be conducted so as to control the conduction of the current closing phase; as shown in fig. 6, if the current off phase is the a phase or the C phase, the Q1 is controlled to be turned on; if the current off phase is the B phase or the D phase, the Q5 is controlled to be conducted.
As shown in fig. 2, when the real-time on-state current is greater than the current upper limit value, the Q1 is controlled to be turned off to limit the current upper limit; when the real-time conduction current is smaller than the lower limit value of the current, the Q5 is controlled to be closed, the lower limit value of the current is limited, the current is enabled to fluctuate in a set range, and therefore the magnitude of the generated positive and negative torque can be controlled.
In some embodiments, controlling the operation of the switched reluctance motor according to the control parameter includes: and controlling the duty ratio of the current conducting phase of the switched reluctance motor according to the reference duty ratio.
Specifically, as shown in fig. 6, if the current on-phase is the a-phase or the C-phase, the duty ratio when Q1 is turned on is controlled according to the calculated reference duty ratio to adjust the current rising speed; and if the current conducting phase is the B phase or the D phase, controlling the duty ratio when the Q5 is switched on according to the calculated reference duty ratio so as to adjust the current rising speed.
As shown in fig. 3, the average voltage is adjusted by adjusting the duty ratio when Q1 or Q5 is turned on, and then the current magnitude is changed to adjust the speed of current rise, so that the current chopping control accuracy is higher, for example, a smaller reference current, since the voltage is higher, the current rise speed is faster, and it is difficult to accurately control the current, at this time, the current rise speed can be limited by reducing the duty ratio, so as to improve the accuracy of current control; when the load is large and the reference current is large, the duty ratio can be improved to improve the rising speed of the current and improve the response speed of the current, so that the response speed of the motor to the load change is improved.
In some embodiments, controlling the operation of the switched reluctance motor according to the control parameter includes: and controlling the on-time (on-angle) and the off-time (off-angle) of each phase of the switched reluctance motor according to the determined on-angle and off-angle so as to control the on-interval of each phase, thereby generating proper average torque.
As shown in fig. 4 and 5, by adjusting the conduction angle and the off angle, the current waveform and the relative position of the current waveform and the winding inductance waveform can be changed, thereby controlling the operation of the motor.
Fig. 7 is a schematic diagram showing relative positions and sector divisions of winding inductances. The sector division can be detected by two photoelectric switches installed on the motor, and according to the running direction (positive rotation) of the motor in the figure, taking phase a as an example to illustrate, four sectors of the inductor exist in one period, namely an inductor rising area (1), an inductor maximum area (0), an inductor falling area (2) and an inductor minimum area (3). In fig. 7, linear processing is performed for convenience of description, the inductance actually changes in the maximum area and the minimum area, the inductance rise and the inductance fall are not completely linear, the inductance distribution of the four-phase winding is separated by 90 degrees in electrical angle, and the four-phase winding corresponds to exactly one sector, that is, the sector 1 corresponds to the phase a inductance rise area, the phase B inductance maximum area, the phase C inductance fall area, and the phase D inductance minimum area. Still taking the a-phase as an example, according to the operating principle of the switched reluctance motor, since a positive torque is generated by a current flowing in the inductance rising phase (the portions of the sector 1, the sector 0, and the sector 3) and a negative torque is generated by a current flowing in the inductance falling phase (the portions of the sector 2, the sector 0, and the sector 3), the on-period of each phase can be controlled by adjusting the on-time (on-angle) and the off-time (off-angle) of the a-phase, and an appropriate average torque is generated to allow the motor to operate smoothly. When the vehicle is unloaded, in order to stabilize the speed, a large amount of negative torque is generated, and when the vehicle is heavily loaded, the phase A is only switched on in a positive torque section, and the conduction angle and the turn-off angle are changed along with the change of the load, wherein the on-off states of the phases Q3, Q4, Q6 and Q2 respectively correspond to the on-off states of the phases A, B, C and D.
Further, in order to enable the switched reluctance motor to operate more stably, the invention also introduces current chopping control (namely, the switched reluctance motor is controlled to operate according to the set upper and lower current limit values) and voltage chopping control (namely, the switched reluctance motor is controlled to operate according to the duty ratio).
According to the invention, by combining three driving modes of current chopping control, voltage chopping control and conducting position angle control, the switched reluctance motor can stably run at a low speed, can also quickly respond to the change of a load, and effectively improves the stability and reliability of the switched reluctance motor.
The present invention also provides a switched reluctance motor, comprising: a detection device and a controller;
the detection device is used for detecting the rotating speed of the switched reluctance motor and outputting photoelectric switch signals.
The controller is used for executing the low-speed operation control method of the switched reluctance motor disclosed by the embodiment of the invention. The controller calculates the real-time rotating speed of the switched reluctance motor according to the received photoelectric switch signal. Alternatively, the detection means may be an opto-electronic switch.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (12)
1. A low-speed operation control method of a switched reluctance motor is characterized by comprising the following steps:
acquiring the real-time rotating speed of the switched reluctance motor;
determining a reference current according to the real-time rotating speed and the set rotating speed;
obtaining control parameters of the switched reluctance motor in low-speed operation according to the reference current;
and controlling the switched reluctance motor to operate according to the control parameters.
2. The method for controlling the low-speed operation of the switched reluctance motor according to claim 1, wherein the determining the reference current according to the real-time rotation speed and the set rotation speed comprises:
making a difference between the set rotating speed and the real-time rotating speed to obtain a difference value between the set rotating speed and the real-time rotating speed;
and calculating by adopting a preset adjusting algorithm according to the difference value between the set rotating speed and the real-time rotating speed to obtain the reference current.
3. The switched reluctance motor low-speed operation control method according to claim 2, wherein the preset regulation algorithm is any one or more of an incremental PI regulation algorithm, a position PI algorithm and a PID algorithm.
4. The method for controlling the low-speed operation of the switched reluctance motor according to claim 1, wherein the obtaining the control parameter of the low-speed operation of the switched reluctance motor according to the reference current comprises:
determining a current deviation value according to the reference current;
and determining a current upper limit value and a current lower limit value according to the current deviation value and the reference current.
5. The method for controlling the low-speed operation of the switched reluctance motor according to claim 1, wherein the obtaining the control parameter of the low-speed operation of the switched reluctance motor according to the reference current comprises:
and determining a reference duty ratio for controlling the switched reluctance motor according to the reference current.
6. The method for controlling the low-speed operation of the switched reluctance motor according to claim 1, wherein the obtaining the control parameter of the low-speed operation of the switched reluctance motor according to the reference current comprises:
and acquiring the conduction angle and the turn-off angle of each phase of the switched reluctance motor according to the reference current.
7. The switched reluctance motor low-speed operation control method according to claim 4, wherein the controlling the switched reluctance motor to operate according to the control parameter comprises:
acquiring real-time conduction current of the switched reluctance motor;
comparing the real-time conduction current with the current upper limit value and the current lower limit value;
and controlling the current on-phase of the switched reluctance motor to be switched on or controlling the current off-phase of the switched reluctance motor to be switched on according to the comparison result.
8. The switched reluctance motor low-speed operation control method of claim 7, wherein the comparison result includes: the real-time conduction current is larger than the current upper limit value, or the real-time conduction current is smaller than the current lower limit value.
9. The method for controlling the low-speed operation of the switched reluctance motor according to claim 8, wherein the controlling the current on-phase of the switched reluctance motor to be turned on or the current off-phase of the switched reluctance motor to be turned on according to the comparison result comprises:
and if the real-time conduction current is larger than the current upper limit value, controlling the current conduction phase of the switched reluctance motor to be closed.
10. The method for controlling the low-speed operation of the switched reluctance motor according to claim 8, wherein the controlling the current on-phase of the switched reluctance motor to be turned on or the current off-phase of the switched reluctance motor to be turned on according to the comparison result comprises:
and if the real-time conduction current is smaller than the current lower limit value, controlling the current closing phase of the switched reluctance motor to be conducted.
11. The switched reluctance motor low-speed operation control method of claim 5, wherein the controlling the switched reluctance motor to operate according to the control parameter comprises:
and controlling the duty ratio of the current conducting phase of the switched reluctance motor according to the reference duty ratio.
12. A switched reluctance machine, comprising: a detection device and a controller;
the detection device is used for detecting the rotating speed of the switched reluctance motor and outputting photoelectric switch signals;
the controller is used for executing the low-speed operation control method of the switched reluctance motor of any one of claims 1 to 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110701453.7A CN113612426B (en) | 2021-06-23 | Low-speed operation control method of switch reluctance motor and switch reluctance motor | |
| PCT/CN2021/137227 WO2022267378A1 (en) | 2021-06-23 | 2021-12-10 | Low-speed operation control method for switched reluctance motor, and switched reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110701453.7A CN113612426B (en) | 2021-06-23 | Low-speed operation control method of switch reluctance motor and switch reluctance motor |
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| Publication Number | Publication Date |
|---|---|
| CN113612426A true CN113612426A (en) | 2021-11-05 |
| CN113612426B CN113612426B (en) | 2024-06-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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