CN106357173B - Synchronous reluctance motor start control method, device and controller - Google Patents
Synchronous reluctance motor start control method, device and controller Download PDFInfo
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- CN106357173B CN106357173B CN201610881133.3A CN201610881133A CN106357173B CN 106357173 B CN106357173 B CN 106357173B CN 201610881133 A CN201610881133 A CN 201610881133A CN 106357173 B CN106357173 B CN 106357173B
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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
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Abstract
The embodiment of the invention discloses a synchronous reluctance motor start control method, a synchronous reluctance motor start control device and a controller. The method comprises the following steps: generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor, wherein the direct-axis current in the direct-axis current time function is negatively related to the starting time, and the quadrature-axis current in the quadrature-axis current time function is negatively related to the time; and acquiring real-time direct-axis current and real-time quadrature-axis current according to the direct-axis current time function and the quadrature-axis current time function, and injecting the real-time direct-axis current and the real-time quadrature-axis current into the motor. According to the technical scheme of the embodiment of the invention, when the synchronous reluctance motor is started, the larger real-time direct-axis current and the larger real-time quadrature-axis current are respectively injected into the direct axis and the quadrature axis, so that the on-load starting capability and the starting response speed of the motor are improved, the starting performance of the motor is improved, and the synchronous reluctance motor can be quickly started.
Description
Technical Field
The embodiment of the invention relates to the technical field of synchronous reluctance motor transmission control, in particular to a synchronous reluctance motor start control method, a synchronous reluctance motor start control device and a synchronous reluctance motor start control controller.
Background
The synchronous reluctance motor is a synchronous motor including a rotor rotating at the same frequency as a stator and a stator rotating by means of reluctance force generated between the rotor and the stator.
The synchronous reluctance machine needs to know the position of the rotor at start-up and operation, and the simplest method is to install a position sensor. However, the installation of the position sensor increases the volume and cost of the motor, and in some occasions, the installation of the position sensor is not allowed or can not be realized, and at present, a control algorithm without the position sensor is mainly adopted. However, when the synchronous reluctance motor is started, in the control algorithm without the position sensor, the current for driving the motor to start is increased from an initial zero value to a current value capable of driving the motor to start, and the current is increased slowly, so that the starting speed of the motor is slow, and even a reverse rotation phenomenon can be generated.
Disclosure of Invention
The embodiment of the invention provides a synchronous reluctance motor start control method, a synchronous reluctance motor start control device and a synchronous reluctance motor start controller, which are used for realizing the rapid start of a synchronous reluctance motor.
In a first aspect, an embodiment of the present invention provides a method for controlling start of a synchronous reluctance motor, including:
generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor, wherein the direct-axis current in the direct-axis current time function is negatively related to the starting time, and the quadrature-axis current in the quadrature-axis current time function is negatively related to the time;
and acquiring real-time direct-axis current and real-time quadrature-axis current according to the direct-axis current time function and the quadrature-axis current time function, and injecting the real-time direct-axis current and the real-time quadrature-axis current into the motor.
Further, the generating a direct-axis current time function according to the parameter of the motor includes:
and determining initial direct-axis current according to the parameters of the motor, and generating a direct-axis current time function according to the initial direct-axis current, the starting time and the running direct-axis current.
Further, the generating a direct-axis current time function according to the starting direct-axis current, the starting time and the operating direct-axis current includes:
and generating a direct-axis current time function of which the direct-axis current and the starting time are in a linear relation.
Further, the generating a quadrature axis current time function according to the parameter of the motor includes:
and determining initial quadrature axis current according to the parameters of the motor, and generating a quadrature axis current time function according to the initial quadrature axis current.
Further, the method further comprises:
estimating the angle and the speed of the motor rotor according to the direct-axis current and the quadrature-axis current;
outputting feedback direct axis current and feedback quadrature axis current according to the speed;
correspondingly, the injecting real-time direct-axis current and real-time quadrature-axis current into the motor includes:
acquiring a larger direct axis current value in the real-time direct axis current and the feedback direct axis current, and taking the larger direct axis current value as a direct axis current value injected into a motor; and
and acquiring a larger quadrature axis current value in the real-time quadrature axis current and the feedback quadrature axis current, and taking the larger alternating current value as a quadrature axis current value injected into the motor.
In a second aspect, an embodiment of the present invention further provides a synchronous reluctance motor start control apparatus, where the apparatus includes:
the current time function generating module is used for generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor, wherein the direct-axis current in the direct-axis current time function is negatively related to starting time, and the quadrature-axis current in the quadrature-axis current time function is negatively related to time;
and the real-time current injection module is used for acquiring real-time direct-axis current and real-time quadrature-axis current according to the direct-axis current time function and the quadrature-axis current time function and injecting the real-time direct-axis current and the real-time quadrature-axis current into the motor.
Further, the current time function generating module comprises:
and the direct-axis current time function generating unit is used for determining initial direct-axis current according to the parameters of the motor and generating a direct-axis current time function according to the initial direct-axis current, the starting time and the running direct-axis current.
Further, the direct-axis current time function generating unit is specifically configured to:
and generating a direct-axis current time function of which the direct-axis current and the starting time are in a linear relation.
Further, the current time function generating module comprises:
and the quadrature axis current time function generating unit is used for determining initial quadrature axis current according to the parameters of the motor and generating a quadrature axis current time function according to the initial quadrature axis current.
Further, the apparatus further comprises:
the estimation module is used for estimating the angle and the speed of the motor rotor according to the direct-axis current and the quadrature-axis current;
the current output module outputs feedback direct-axis current and feedback quadrature-axis current according to the speed;
correspondingly, the real-time current injection module comprises:
the larger direct-axis current acquisition module is used for acquiring a larger direct-axis current value in the real-time direct-axis current and the feedback direct-axis current, and taking the larger direct-axis current value as a direct-axis current value injected into the motor; and
and the large quadrature axis current acquisition module is used for acquiring a large quadrature axis current value in the real-time quadrature axis current and the feedback quadrature axis current and taking the large alternating current value as a quadrature axis current value injected into the motor.
In a third aspect, an embodiment of the present invention further provides a controller, which is applied to a synchronous reluctance motor, where the controller includes the synchronous reluctance motor start control device provided in the foregoing embodiment.
According to the embodiment of the invention, when the synchronous reluctance motor is started, the real-time direct axis current and the real-time quadrature axis current are respectively injected into the direct axis and the quadrature axis, and because the injected real-time direct axis current and the real-time quadrature axis current are far larger than the direct axis current and the quadrature axis current in the process that the motor is slowly started from rest, the on-load starting capability and the starting response speed of the motor are improved, the starting performance of the motor is improved, and the synchronous reluctance motor can be quickly started.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments thereof, made with reference to the following drawings:
fig. 1 is a flowchart of a synchronous reluctance motor start control method according to an embodiment of the present invention;
fig. 2 is a flowchart of a synchronous reluctance motor start control method according to a second embodiment of the present invention;
fig. 3a is a reference diagram of a rotor structure of a synchronous reluctance motor according to a third embodiment of the present invention;
FIG. 3b is a graph of the time function of the direct current provided by the third embodiment of the present invention;
FIG. 3c is a cross-axis current-time function graph according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a synchronous reluctance motor start control apparatus according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for controlling starting of a synchronous reluctance motor according to an embodiment of the present invention, where the method of this embodiment may be used to improve starting performance of the synchronous reluctance motor, and the method may be implemented by a synchronous reluctance motor control starting apparatus, which may be implemented by software and/or hardware, and the apparatus may be integrated in a controller of any synchronous reluctance motor, which is not limited in this embodiment.
Referring to fig. 1, the synchronous reluctance motor start control method includes:
and S110, generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor.
And generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor, wherein the direct-axis current in the direct-axis current time function is negatively related to the starting time, and the quadrature-axis current in the quadrature-axis current time function is negatively related to the time.
In this embodiment, the initial direct axis current, the initial quadrature axis current, the start duration, and the operating direct axis current are determined according to the synchronous reluctance motor and the actual application conditions of the synchronous reluctance motor, such as the rated current of the motor and the rated torque required by the application system of the motor. The initial direct axis current value is not less than the minimum direct axis current value capable of driving the synchronous reluctance motor to operate and not more than the rated direct axis current value of the synchronous reluctance motor in normal operation so as to avoid damaging the motor. Illustratively, the synchronous reluctance motor operates with a minimum direct-axis current value of 6A and a nominal direct-axis current value of 12A, and then the initial direct-axis current value is between 6A and 12A, and preferably, the initial direct-axis current value is set to 6A. The initial quadrature axis current value is not less than the minimum quadrature axis current value capable of driving the synchronous reluctance motor to operate and not greater than the rated quadrature axis current value of the motor to operate, so that the motor is prevented from being damaged. Illustratively, the minimum quadrature axis current value of the synchronous reluctance motor is 8A, the rated quadrature axis current value is 16A, and the initial quadrature axis current value is between 8A and 16A, preferably, the initial quadrature axis current value is set to be 8A. The operation direct axis current is the current value of the synchronous reluctance motor in stable operation. During the starting process of the synchronous reluctance motor, the direct-axis current and the quadrature-axis current are continuously reduced along with the increase of the rotating speed. And generating a direct-axis current time function according to the starting direct-axis current, the starting time and the running direct-axis current, wherein the direct-axis current and the starting time are in negative correlation in the direct-axis current time function, namely the direct-axis current is reduced along with the increase of the starting time. For example, the direct-axis current time function is an exponential function in which the direct-axis current monotonically decreases with the start time, and preferably, the direct-axis current time function is a function in which the direct-axis current and the start time are in a linear relationship, an image formed by the direct-axis current function is a straight line, and the slope of the straight line is negative. Furthermore, a quadrature current time function is determined from the starting quadrature current, in which quadrature current is inversely correlated with time, i.e. the quadrature current decreases with increasing time. For example, the time function of the quadrature axis current is a hyperbolic function in which the quadrature axis current monotonically decreases with time, and preferably, the quadrature axis current is linear with time, i.e., the quadrature axis current decreases with increasing time, and may decrease to zero near or at the start-up time.
And S120, acquiring real-time direct axis current and real-time quadrature axis current according to the direct axis current time function and the quadrature axis current time function, and injecting the real-time direct axis current and the real-time quadrature axis current into the motor.
And in the starting time, respectively acquiring real-time direct-axis current and real-time quadrature-axis current corresponding to a certain starting moment according to the direct-axis current time function and the quadrature-axis current time function, injecting the real-time direct-axis current into a direct axis of the synchronous reluctance motor, and injecting the real-time quadrature-axis current into a quadrature axis of the synchronous reluctance motor.
Preferably, after the synchronous reluctance motor is started, namely when the synchronous reluctance motor starts to operate stably, real-time direct-axis current is injected into the motor with a constant operation direct-axis current value, so that when the load of the synchronous reluctance motor changes suddenly, the estimated motor rotor angle does not have large deviation, the effect of stably outputting the estimated angle is achieved, and the motor can keep operating stably.
The embodiment injects real-time direct-axis current and real-time quadrature-axis current into the direct axis and the quadrature axis respectively when the synchronous reluctance motor is started, and because the injected real-time direct-axis current and real-time quadrature-axis current are far greater than the direct-axis current and the quadrature-axis current of the motor from rest to slow start, the on-load starting capability and the starting response speed of the motor are improved, the starting performance of the motor is improved, and the synchronous reluctance motor can be started rapidly.
Example two
Fig. 2 is a flowchart of a start control of a synchronous reluctance motor according to a second embodiment of the present invention, in which on the basis of the second embodiment, a step is added: estimating the angle and the speed of the motor rotor according to the direct-axis current and the quadrature-axis current; outputting feedback direct axis current and feedback quadrature axis current according to the speed; correspondingly, the real-time direct-axis current and the real-time quadrature-axis current are injected into the motor, and the method is specifically optimized as follows: acquiring a larger direct axis current value in the real-time direct axis current and the feedback direct axis current, and taking the larger direct axis current value as a direct axis current value injected into a motor; and acquiring a larger quadrature axis current value in the real-time quadrature axis current and the feedback quadrature axis current, and taking the larger alternating current value as a quadrature axis current value injected into the motor. Referring to fig. 2, the synchronous reluctance motor start control method includes:
and S210, generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor.
And S220, acquiring real-time direct-axis current and real-time quadrature-axis current according to the direct-axis current time function and the quadrature-axis current time function, and injecting the real-time direct-axis current and the real-time quadrature-axis current into the motor.
And S230, estimating the angle and the speed of the motor rotor according to the direct-axis current and the quadrature-axis current.
The magnitudes of the injected direct-axis current and quadrature-axis current are not fixed values but are values that decrease as the rotational speed of the synchronous reluctance motor increases. The input direct-axis current is mainly used for exciting the stator, and the input quadrature-axis current is mainly used for enabling the stator to generate rotating torque. Before the synchronous reluctance motor is started, the angle and the speed of the rotor cannot be estimated, and the angle and the speed of the rotor are set to be zero in a program. Because of the adjusting function of the speed ring, the direct-axis current and the alternating current of the motor are injected, so that the synchronous reluctance motor generates larger initial rotation torque, and the rotating speed of the synchronous reluctance motor can be adjusted to stably approach the rotating speed of the motor set by a user. At this time, the angle and speed of the rotor are estimated by flux linkage integration.
In a direct-quadrature coordinate system (also referred to as a d-q coordinate system), the electrical dynamics of a synchronous reluctance motor can be represented by the following matrix:
the above voltage equation is expressed as a state equation:
in the formula, V d 、V q The stator voltage is the direct axis stator voltage and the quadrature axis stator voltage; r s A stator winding resistor; i.e. i d 、i q Is a straight shaft,Quadrature axis stator current; l is d 、L q The self-inductance of the stator winding of the direct axis and the quadrature axis is realized; omega re Is the electrical angular velocity at which the rotor rotates.
And S240, outputting feedback direct-axis current and feedback quadrature-axis current according to the speed.
When the synchronous reluctance motor is started, the speed of the rotor estimated by using a flux linkage integration method is adjusted by a speed loop, and feedback direct-axis current idref and feedback quadrature-axis current iqref are output.
And S250, acquiring a larger direct axis current value in the real-time direct axis current and the feedback direct axis current, and taking the larger direct axis current value as a direct axis current value injected into the motor.
And comparing the feedback direct axis current idref output by the speed loop with the real-time direct axis current. If the feedback direct axis current idref is larger than or equal to the real-time direct axis current, taking the feedback direct axis current idref as an input value of a current loop in the program control of the synchronous reluctance motor; and if the feedback direct-axis current idref is smaller than the real-time direct-axis current, taking the real-time direct-axis current as an input value of a current loop in the program control of the synchronous reluctance motor. Injecting a larger direct-axis current value into the synchronous reluctance motor through the adjusting action of the current loop, and finally acquiring the actual direct-axis current of the synchronous reluctance motor.
And S260, acquiring a larger quadrature axis current value in the real-time quadrature axis current and the feedback quadrature axis current, and taking the larger alternating current value as a quadrature axis current value injected into the motor.
Corresponding to S250, the feedback quadrature axis current iqref output by the speed loop is compared in magnitude with the real-time quadrature axis current. If the feedback quadrature axis current iqref is larger than or equal to the real-time quadrature axis current, taking the feedback quadrature axis current iqref as an input value of a current loop in the program control of the synchronous reluctance motor; and if the feedback quadrature axis current iqref is smaller than the real-time quadrature axis current, taking the real-time direct axis current as an input value of a current loop in the program control of the synchronous reluctance motor. Injecting a larger quadrature axis current value into the synchronous reluctance motor through the adjusting action of the current loop, and finally acquiring the actual quadrature axis current of the synchronous reluctance motor.
In the embodiment, when the synchronous reluctance motor is started, the speed loop outputs the larger direct-axis current of the feedback direct-axis current and the real-time direct-axis current and outputs the larger quadrature-axis current of the feedback quadrature-axis current value and the real-time quadrature-axis current to be injected into the synchronous reluctance motor. The synchronous reluctance motor is started with large torque, is started quickly, improves the starting performance of the synchronous reluctance motor, and can stably increase the rotating speed to the rotating speed set by a user while realizing the quick starting of the synchronous reluctance motor.
EXAMPLE III
The present embodiment provides a preferable scheme of a synchronous reluctance motor start control method based on the above embodiments.
The synchronous reluctance motor in the embodiment is a C63 series three-phase 3.5kw synchronous reluctance motor. The synchronous reluctance motor has a rotor resistance Rs of 0.235 ohm, a direct axis (also called d axis) inductance component Ld of 25mH, a quadrature axis (also called q axis) inductance component Lq of 5mH, and a pole pair number of 2P. Fig. 3a is a reference diagram of a synchronous reluctance rotor structure in an embodiment, and a difference value between the synchronous reluctance motors Ld and Lq is a basis for generating a rotating torque by the motors.
In this embodiment, according to the C63 series three-phase 3.5kw synchronous reluctance motor and its actual operating condition, the following parameters are set:
the initial direct-axis current idminset is 6A, and idminset is the minimum value of the d-axis current set when the synchronous reluctance motor is started;
the initial quadrature axis current iqmminset is 6A, and iqmminset is the minimum value of the q axis current set when the synchronous reluctance motor is started;
the starting time duration is 1s, and the starting time duration is the starting time of the synchronous reluctance motor;
and the operation direct-axis current idmin is equal to 2A, and idmin is the minimum value of the d-axis current set when the synchronous reluctance motor operates.
And respectively determining a direct-axis current time function and a quadrature-axis current time function according to the parameters. Fig. 3b is a diagram of the direct-axis current time function in this embodiment, and idminset of the synchronous reluctance motor is set to 6A before the starting time is 1s, then continuously decreases with a certain slope, and is 2A when the starting time is 1s, and finally is kept at 2A. Fig. 3c is a graph of the quadrature axis current time function in this embodiment, where iqmminset is initially set to 6A and then decreases with a slope until it becomes 0.
Before the synchronous reluctance motor is started, the rotor angle and the speed cannot be estimated, and the two values set in the program are zero. The synchronous reluctance motor can generate rotating torque because the motor has a salient pole ratio, which is Ld/Lq equal to 5 in the embodiment.
Before the starting time of the synchronous reluctance motor is 1s, idminset is set to be 6A, then the idminset is continuously reduced with a certain slope, and the idminset is 2A when the starting time of the synchronous reluctance motor is 1s, and finally the idminset is kept at 2A. iqminset is initially set to 6A and then decreases with a slope until it becomes 0. When the synchronous reluctance motor is started, the speed loop outputs feedback direct axis current of idref and outputs feedback quadrature axis current of iqref; the real-time direct-axis current injected into the synchronous reluctance motor is id, and the real-time quadrature-axis current injected into the synchronous reluctance motor is iq. When idref < id, the d-axis current set value actually used in the program control is idref; when iqref < iq, the q-axis current set value iqrefuse actually used in the program control is iq, and when iqref > is iq, the q-axis current set value iqrefuse actually used in the program control is iqref. Because of the adjusting function of the speed ring, the direct-axis current and the alternating current of the motor are injected, so that the synchronous reluctance motor generates larger initial rotation torque, and the rotating speed of the synchronous reluctance motor can be adjusted to stably approach the rotating speed of the motor set by a user.
After the synchronous reluctance motor is started for 1s, the synchronous reluctance motor starts to stably operate, and real-time direct-axis current is injected into the motor at a constant operation direct-axis current value 2A. When the load of the synchronous reluctance motor changes suddenly, the estimated angle of the motor rotor cannot have large deviation, the effect of stably outputting the estimated angle is achieved, and the motor can keep stable operation.
The embodiment injects real-time direct-axis current and real-time quadrature-axis current into the direct axis and the quadrature axis respectively when the synchronous reluctance motor is started, so that the on-load starting capability and the starting response speed of the motor are improved, the starting performance of the motor is improved, and the synchronous reluctance motor can be quickly started. And the synchronous reluctance motor can be started quickly, and meanwhile, the rotating speed can be stably improved to reach the rotating speed set by a user.
Example four
Fig. 4 is a schematic structural diagram of a synchronous reluctance motor start control device provided in the fourth embodiment, where the synchronous reluctance motor start control device includes: a current time function generating module 410 and a real-time current injecting module 420, each of which is described in detail below.
A current time function generating module 410, configured to generate a direct-axis current time function and a quadrature-axis current time function according to the parameter of the motor, where a direct-axis current in the direct-axis current time function is negatively related to a start time, and a quadrature-axis current in the quadrature-axis current time function is negatively related to a time;
and the real-time current injection module 420 is configured to obtain real-time direct-axis current and real-time quadrature-axis current according to the direct-axis current time function and the quadrature-axis current time function, and inject the real-time direct-axis current and the real-time quadrature-axis current into the motor.
Optionally, the current time function generating module 410 includes:
and the direct-axis current time function generating unit is used for determining initial direct-axis current according to the parameters of the motor and generating a direct-axis current time function according to the initial direct-axis current, the starting time and the running direct-axis current.
Optionally, the direct-axis current time function generating unit is specifically configured to:
and generating a direct-axis current time function of which the direct-axis current and the starting time are in a linear relation.
Optionally, the current time function generating module 410 includes:
and the quadrature axis current time function generating unit is used for determining initial quadrature axis current according to the parameters of the motor and generating a quadrature axis current time function according to the initial quadrature axis current.
Optionally, the apparatus further comprises:
the estimation module is used for estimating the angle and the speed of the motor rotor according to the direct-axis current and the quadrature-axis current;
the current output module outputs feedback direct-axis current and feedback quadrature-axis current according to the speed;
accordingly, the real-time current injection module 420 includes:
the larger direct-axis current acquisition module is used for acquiring a larger direct-axis current value in the real-time direct-axis current and the feedback direct-axis current, and taking the larger direct-axis current value as a direct-axis current value injected into the motor; and
and the large quadrature axis current acquisition module is used for acquiring a large quadrature axis current value in the real-time quadrature axis current and the feedback quadrature axis current and taking the large alternating current value as a quadrature axis current value injected into the motor.
The embodiment injects real-time direct-axis current and real-time quadrature-axis current into the direct axis and the quadrature axis respectively when the synchronous reluctance motor is started, and because the injected real-time direct-axis current value and the injected real-time quadrature-axis current value are far greater than the direct-axis current and the quadrature-axis current of the motor from rest to slow start, the on-load starting capability and the starting response speed of the motor are improved, the starting performance of the motor is improved, and the synchronous reluctance motor can be started rapidly.
The synchronous reluctance motor starting control device provided by the embodiment of the invention can execute the synchronous reluctance motor starting control method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
The embodiment of the invention also provides a controller, which is applied to the synchronous reluctance motor, and the controller comprises the synchronous reluctance motor starting control device provided by the embodiment of the invention, has the same modules, can realize the same function, and is not described herein again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (11)
1. A synchronous reluctance motor starting control method is characterized by comprising the following steps:
generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor, wherein the direct-axis current in the direct-axis current time function is negatively correlated with the starting time, and the quadrature-axis current in the quadrature-axis current time function is negatively correlated with the time;
acquiring real-time direct axis current and real-time quadrature axis current according to the direct axis current time function and the quadrature axis current time function, and injecting the real-time direct axis current and the real-time quadrature axis current into the motor; wherein, the injection current is a set current given value.
2. The method of claim 1, wherein generating a direct-axis current time function from the parameters of the electric machine comprises:
and determining initial direct-axis current according to the parameters of the motor, and generating a direct-axis current time function according to the initial direct-axis current, the starting time and the running direct-axis current.
3. The method of claim 2, wherein generating a direct-axis current time function from the starting direct-axis current, the start-up duration, and the running direct-axis current comprises:
and generating a direct-axis current time function of which the direct-axis current and the starting time are in a linear relation.
4. The method of claim 1, wherein generating a quadrature axis current time function from the parameters of the electric machine comprises:
and determining initial quadrature axis current according to the parameters of the motor, and generating a quadrature axis current time function according to the initial quadrature axis current.
5. The method of claim 1, further comprising:
estimating the angle and the speed of the motor rotor according to the direct-axis current and the quadrature-axis current;
outputting feedback direct axis current and feedback quadrature axis current according to the speed loop;
correspondingly, the injection of the real-time direct-axis current and the real-time quadrature-axis current into the motor comprises:
acquiring a larger direct axis current value in the real-time direct axis current and the feedback direct axis current, and taking the larger direct axis current value as a direct axis current value injected into a motor; and
and acquiring a larger quadrature axis current value in the real-time quadrature axis current and the feedback quadrature axis current, and taking the larger quadrature axis current value as a quadrature axis current value injected into the motor.
6. A synchronous reluctance motor start control apparatus, comprising:
the current time function generating module is used for generating a direct-axis current time function and a quadrature-axis current time function according to the parameters of the motor, wherein the direct-axis current in the direct-axis current time function is negatively related to starting time, and the quadrature-axis current in the quadrature-axis current time function is negatively related to time;
the real-time current injection module is used for acquiring real-time direct-axis current and real-time quadrature-axis current according to the direct-axis current time function and the quadrature-axis current time function and injecting the real-time direct-axis current and the real-time quadrature-axis current into the motor; wherein, the injection current is a set current given value.
7. The apparatus of claim 6, wherein the current time function generating module comprises:
and the direct-axis current time function generating unit is used for determining initial direct-axis current according to the parameters of the motor and generating a direct-axis current time function according to the initial direct-axis current, the starting time and the running direct-axis current.
8. The apparatus according to claim 7, wherein the direct-axis current time function generating unit is specifically configured to:
and generating a direct-axis current time function of which the direct-axis current and the starting time are in a linear relation.
9. The apparatus of claim 6, wherein the current time function generating module comprises:
and the quadrature axis current time function generating unit is used for determining initial quadrature axis current according to the parameters of the motor and generating a quadrature axis current time function according to the initial quadrature axis current.
10. The apparatus of claim 6, further comprising:
the estimation module is used for estimating the angle and the speed of the motor rotor according to the direct-axis current and the quadrature-axis current;
the current output module outputs feedback direct-axis current and feedback quadrature-axis current according to the speed loop;
correspondingly, the real-time current injection module comprises:
the larger direct axis current acquisition module is used for acquiring a larger direct axis current value in the real-time direct axis current and the feedback direct axis current, and taking the larger direct axis current value as a direct axis current value injected into the motor; and
and the large quadrature axis current acquisition module is used for acquiring a large quadrature axis current value in the real-time quadrature axis current and the feedback quadrature axis current, and taking the large quadrature axis current value as a quadrature axis current value injected into the motor.
11. A controller applied to a synchronous reluctance motor comprises: a synchronous reluctance machine start-up control apparatus as claimed in any one of claims 6 to 10.
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| CN104158456A (en) * | 2014-05-28 | 2014-11-19 | 东南大学 | Non-position sensing control method for electric vehicle drive motor |
| CN104158459A (en) * | 2014-07-29 | 2014-11-19 | 长城汽车股份有限公司 | Inductance determination method and device for permanent-magnet synchronous motor |
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| CN101237205A (en) * | 2008-02-28 | 2008-08-06 | 武汉大学 | Magnetic control stepless regulating transmission |
| CN101693445A (en) * | 2009-10-21 | 2010-04-14 | 西南交通大学 | Overpotential phase-splitting method of alternating current traction transmission system of speedless sensor |
| CN103326653A (en) * | 2013-06-24 | 2013-09-25 | 珠海格力电器股份有限公司 | Switched reluctance motor and control method thereof |
| CN104158456A (en) * | 2014-05-28 | 2014-11-19 | 东南大学 | Non-position sensing control method for electric vehicle drive motor |
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