CN117914191A - Control system and control method for starting permanent magnet motor - Google Patents

Control system and control method for starting permanent magnet motor Download PDF

Info

Publication number
CN117914191A
CN117914191A CN202410072312.7A CN202410072312A CN117914191A CN 117914191 A CN117914191 A CN 117914191A CN 202410072312 A CN202410072312 A CN 202410072312A CN 117914191 A CN117914191 A CN 117914191A
Authority
CN
China
Prior art keywords
motor
starting
current
permanent magnet
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410072312.7A
Other languages
Chinese (zh)
Inventor
何雄军
林志强
张子鉴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Sanyuan Te Electronic Technology Co ltd
Original Assignee
Qingdao Sanyuan Te Electronic Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Sanyuan Te Electronic Technology Co ltd filed Critical Qingdao Sanyuan Te Electronic Technology Co ltd
Priority to CN202410072312.7A priority Critical patent/CN117914191A/en
Publication of CN117914191A publication Critical patent/CN117914191A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/20—Arrangements for starting
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • 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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/22—Current control, e.g. using a current control loop
    • 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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/34—Arrangements for starting
    • 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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/28—Arrangements for controlling current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

The invention discloses a control system for starting a permanent magnet motor, which comprises a controller module, a detection module, a software module and a mode conversion module, wherein the detection module is used for detecting the voltage amplitude and the phase before starting the motor, the detection module can detect the voltage amplitude and the phase when the motor is used as a generator state at the moment before starting, and the software module detects the initial state and operation before starting the motor; the mode conversion module is used for the motor to work in a current mode or a voltage mode. The control system and the control method for starting the permanent magnet motor solve the technical problem that the initial state of the permanent magnet motor is difficult to determine during starting, can solve the faults during starting, realize reliable and accurate starting control of the motor, and detect the initial state of the motor and provide preparation judgment and determination without adding extra hardware.

Description

Control system and control method for starting permanent magnet motor
Technical Field
The invention belongs to the technical field of motor control, and particularly relates to a control system and a control method for starting a permanent magnet motor.
Background
Permanent magnet synchronous motors are widely used in various fields because of the advantages of small size, light weight, high efficiency and the like. Since the rotor of the permanent magnet synchronous motor is a permanent magnet, it is necessary to give a voltage signal synchronized with the permanent magnet when driving the permanent magnet synchronous motor. For loads such as fan, automobile wheel drive, etc., the rotor of the motor may be in three states due to external influence before starting: stationary, forward and reverse. How to distinguish these three states is generally conventional: connecting a position sensor such as an encoder to the motor to detect an initial state of the motor; or adding a circuit to the circuit board to detect the voltage on the phase line of the motor to calculate the initial state of the motor. Both of the above methods require additional hardware to detect the initial state of the motor, and are costly and less reliable in engineering applications.
Disclosure of Invention
The invention aims to solve the problems and provide a motor start control system and a control method which can solve the technical problem of accurate start control when a motor is started, detect the initial state of the motor without adding extra hardware and achieve reliability.
In order to solve the technical problems, the technical scheme of the invention is as follows: a control system for permanent magnet motor start comprising: the system comprises a controller module, a detection module, a software module and a mode conversion module, wherein the detection module is used for detecting the voltage amplitude and the phase before the motor is started, the detection module can detect the voltage amplitude and the phase when the motor is used as a generator state at the moment before the motor is started, and the software module detects the initial state and operation before the motor is started; the mode conversion module is used for the motor to work in a current mode or a voltage mode.
Further, the control system for starting the permanent magnet motor further comprises a starting protection module, wherein the starting protection module is used for judging starting current.
Further, the control system for starting the permanent magnet motor further comprises a temperature judging module, wherein the temperature judging module is used for judging the temperature inside the motor, the temperature can be calculated by using magnetic flux phi and stator resistance R, phi is the magnetic flux (Wb) of the motor, id feedback value, iq feedback value and instruction value are caused by the change of the magnetic flux and the resistance within a certain time, and when the difference exceeds a certain threshold value, starting faults are sent out; at this time, the starting or running current is reduced, the starting is performed again, the temperature judgment is performed, and when the number of continuous judgment exceeds N, namely 3 or 5, the starting fails.
Further, the control system for starting the permanent magnet motor further comprises a cloud module, wherein the cloud module stores motor starting data, starting temperature and starting region position, and after S times of starting according to the region position, the motor starting data are updated by combining big data analysis.
Further, the control system for starting the permanent magnet motor further comprises a time triggering module and an alarm module, wherein the time triggering module at least stores the time length of one of the times t1, t2 and t3 and performs certain triggering output according to the time period; the method comprises the steps of detecting an initial state of a motor by using a software algorithm, and if the motor is operated in a current mode before the motor is started and the current of the motor is controlled to be 0, enabling the voltage output by a controller to be the same as the power generation voltage amplitude of the motor and the phase to be the same; the rotating speed and the direction of the motor can be calculated according to the voltage amplitude and the phase output by the controller.
Permanent magnet synchronous motors can generate three-phase synchronous sine wave voltages (similar to generators) when free to rotate due to external forces. The rated counter electromotive force calculation formula of the permanent magnet synchronous motor is as follows:
Eb=4.44 Φ f K cos (θ), wherein Eb is the nominal back emf (v·s) of a one-phase (or three-phase) motor; phi is motor magnetic flux (Wb) which can be obtained through magnetic circuit design or actual measurement;
f is the rated frequency (Hz) of the motor;
k is the motor power factor, typically 0.95-0.98, and is related to the motor power factor.
Therefore, the invention detects the initial state of the motor by using a software algorithm on the basis of not adding extra hardware, and if the motor is operated in a current mode before the motor is started and the current of the motor is controlled to be 0, the voltage output by the controller is the same as the power generation voltage amplitude of the motor, and the phase is the same. The rotating speed and the direction of the motor can be calculated according to the voltage amplitude and the phase output by the controller.
A permanent magnet synchronous motor is a type of motor that generally uses permanent magnets as a rotor, and generates torque by applying alternating current to the permanent magnets. The magnetic field of the rotor and the exciting current on the stator rotate synchronously, and are called permanent magnet synchronous motors. The common permanent magnet synchronous motor comprises a surface permanent magnet synchronous motor and an embedded permanent magnet synchronous motor, and the torque of the surface permanent magnet synchronous motor and the embedded permanent magnet synchronous motor are related to the magnitudes and phases of a permanent magnet magnetic field and stator currents. In applications, it is desirable to be able to accurately calculate the rated back emf of a permanent magnet synchronous motor.
The invention also discloses a control method for starting the permanent magnet motor, which comprises the following steps:
S1, a mode conversion step, namely converting the operation of the motor into a current mode before the motor is started according to the step of detecting the initial state of the motor before the motor is started;
s2, outputting control, wherein the current of the motor is controlled to be 0;
S3, obtaining a voltage amplitude A Control device and a phase theta Control device angle output by the controller when the input current of the motor is 0;
S4, logically reasoning, namely obtaining a voltage amplitude A Control device and a phase theta Control device angle output by the controller when the input current of the motor is 0; voltage amplitude and phase when the generator is in a state, and according to Eb=4.44 phi f K cos (theta), the rotating speed and direction of the motor are reversely calculated according to the voltage amplitude and phase output by the controller.
Further, the control method for starting the permanent magnet motor further comprises the following steps: decomposing the starting current I into a d-axis current Id and a q-axis current value Iq; the d-axis current Id and the q-axis current value Iq are further divided into a current command value (an identification mark taking a ≡command value) and a current feedback value (an identification mark taking a # -feedback value); the control d-axis current command value Id+=0, and the q-axis current command value Iq++is determined according to the maximum torque control or PI regulation control; the current feedback value is used to correct the motor current input and the control of the motor to be closed loop control.
Further, the control method for starting the permanent magnet motor presets a control period t1, which comprises the following steps: controlling the command value of the quadrature axis current of the motor to be zero; a command value for controlling the direct current of the motor is zero; and acquiring the counter electromotive force Eb, calculating the amplitude and the phase of the counter electromotive force, and calculating the rotating speed and the rotating direction of the permanent magnet motor according to the calculated phase and amplitude.
Further, after the preset control period t1, an operation period t2 is further set, in the period t2, the command value of the quadrature axis current changes in a manner related to time in which a/R is cos (θ), (θ=t2/L is 360, that is, a value between 0 and 360, L is an adjustable parameter to ensure that θ is a value between 0 and 360), where a is a voltage amplitude, and R is a stator resistance; or after the control period t1 is preset, an operation period t2 is further set, and in the period t2, the command value of the direct-axis current changes in a mode related to time in which the command value is a/R sin (θ), wherein (θ=t2/l×360, that is, a value between 0 and 360, L is an adjustable parameter used for guaranteeing a value between 0 and 360), a is a voltage amplitude, and R is a stator resistance.
Further, after the preset control period t1, an operation period t3 is further set, and in the period t3, a step of protection starting is adopted, and a step E of protection starting is adopted, wherein the step F is used for starting the motor in a soft start or voltage reduction starting mode, and the soft start is used for solving the problem of large starting current by gradually increasing the voltage and the current of the motor; the specific operation is that the voltage and the current of the motor are gradually increased when the motor is started, so that the motor is gradually started, the starting current peak value is reduced, and the effect of reducing the starting impact is achieved; the step-down starting solves the problem of large starting current by reducing the power supply voltage; the specific operation is that the power supply voltage is gradually regulated down by a voltage reducer before the motor is started, so that the current is gradually increased, the starting current is reduced, the protection of a power supply system is needed to be considered when the voltage reduction is adopted for starting, and the abnormality of other equipment caused by the too low system voltage is avoided; and F, judging the starting current, wherein the step F is used for judging the starting current so as to prevent the motor from being burnt. This is because when the permanent magnet motor is started, since the magnetic flux is not yet established, the internal resistance is small, and when a power is applied to the coil, the current is drastically increased, resulting in a large starting current. This can burden the motor and system and even lead to burning out of the motor.
The beneficial effects of the invention are as follows: the control system and the control method for starting the permanent magnet motor solve the technical problem that the initial state of the permanent magnet motor is difficult to determine during starting, can solve the faults during starting, realize reliable and accurate starting control of the motor, and detect the initial state of the motor and provide preparation judgment and determination without adding extra hardware. Meanwhile, the technical scheme disclosed by the invention can prevent the motor from being burnt out, because when the permanent magnet motor is started, the magnetic flux is not established yet, the internal resistance is small, and when a power supply is applied to the coil, the current can be increased drastically, so that the starting current is large. This can burden the motor and system and even lead to burning out of the motor.
Drawings
FIG. 1 is a schematic diagram of a control system for starting a permanent magnet motor according to the present invention;
Fig. 2 is a flow chart of a control method for starting a permanent magnet motor according to the present invention.
Reference numerals illustrate: 1. a controller module; 2. a detection module; 3. a software module; 4. a mode conversion module; 5. starting a protection module; 6. a temperature judging module; 7. a cloud module; 8. a time triggering module; 9. and an alarm module.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific examples:
As shown in fig. 1 and fig. 2, the control system for starting a permanent magnet motor provided by the invention comprises a controller module 1, a detection module 2, a software module 3 and a mode conversion module 4, wherein the detection module 2 is used for detecting the voltage amplitude and the phase before starting the motor, the detection module 2 can detect the voltage amplitude and the phase when the motor is used as a generator state at the moment before starting, and the software module 3 is used for detecting the initial state and operation before starting the motor; the mode conversion module 4 is used for the motor to operate in a current mode or a voltage mode.
The control system for starting the permanent magnet motor further comprises a starting protection module 5, wherein the starting protection module 5 is used for judging starting current.
The control system for starting the permanent magnet motor further comprises a temperature judging module 6, wherein the temperature judging module 6 is used for judging the temperature inside the motor, the temperature can be calculated by using magnetic flux phi and stator resistance R, phi is the magnetic flux (Wb) of the motor, id feedback value and Iq feedback value are different from an instruction value in a certain time due to the change of the magnetic flux and the resistance, and when the difference exceeds a certain threshold value, starting faults are sent out; at this time, the starting or running current is reduced, the starting is performed again, the temperature judgment is performed, and when the number of continuous judgment exceeds N, namely 3 or 5, the starting fails.
The control system for starting the permanent magnet motor further comprises a cloud module 7, wherein the cloud module 7 stores motor starting data, starting temperature and starting region position, and after S times of starting according to the region position, the motor starting data are updated by combining big data analysis.
The control system for starting the permanent magnet motor further comprises a time triggering module 8 and an alarm module 9, wherein the time triggering module 8 at least stores the time length of one of the times t1, t2 and t3 and performs certain triggering output according to the time period; the method comprises the steps of detecting an initial state of a motor by using a software algorithm, and if the motor is operated in a current mode before the motor is started and the current of the motor is controlled to be 0, enabling the voltage output by a controller to be the same as the power generation voltage amplitude of the motor and the phase to be the same; the rotating speed and the direction of the motor can be calculated according to the voltage amplitude and the phase output by the controller.
The invention also provides a control method for starting the permanent magnet motor, which comprises the following steps:
s1, mode conversion, namely converting the motor into a current mode before the motor starts according to the step of detecting the initial state of the motor before the motor starts.
S2, outputting control, wherein the current of the motor is controlled to be 0.
And S3, obtaining the voltage amplitude A Control device and the phase theta Control device output by the controller when the input current of the motor is 0.
S4, logically reasoning, namely obtaining a voltage amplitude A Control device and a phase theta Control device angle output by the controller when the input current of the motor is 0; voltage amplitude and phase when the generator is in a state, and according to Eb=4.44 phi f K cos (theta), the rotating speed and direction of the motor are reversely calculated according to the voltage amplitude and phase output by the controller.
The control method for starting the permanent magnet motor further comprises the following steps: decomposing the starting current I into a d-axis current Id and a q-axis current value Iq; the d-axis current Id and the q-axis current value Iq are further divided into a current command value (an identification mark taking a ≡command value) and a current feedback value (an identification mark taking a # -feedback value); the control d-axis current command value Id+=0, and the q-axis current command value Iq++is determined according to the maximum torque control or PI regulation control; the current feedback value is used to correct the motor current input and the control of the motor to be closed loop control.
A control method for starting a permanent magnet motor, which presets a control period t1, comprises the following steps: controlling the command value of the quadrature axis current of the motor to be zero; a command value for controlling the direct current of the motor is zero; and acquiring the counter electromotive force Eb, calculating the amplitude and the phase of the counter electromotive force, and calculating the rotating speed and the rotating direction of the permanent magnet motor according to the calculated phase and amplitude.
After the preset control period t1, an operation period t2 is further set, in the period t2, the command value of the quadrature axis current changes in a mode related to time in which the command value is a/R cos (θ), wherein (θ=t2/l×360, i.e. a value between 0 and 360, L is an adjustable parameter used for guaranteeing a value between 0 and 360), a is a voltage amplitude, and R is a stator resistance; or after the control period t1 is preset, an operation period t2 is further set, and in the period t2, the command value of the direct-axis current changes in a mode related to time in which the command value is a/R sin (θ), wherein (θ=t2/l×360, that is, a value between 0 and 360, L is an adjustable parameter used for guaranteeing a value between 0 and 360), a is a voltage amplitude, and R is a stator resistance.
After a control period t1 is preset, an operation period t3 is further set, and in the t3 period, a step E of protection starting is adopted, and the step F is used for starting the motor in a soft starting or voltage-reducing starting mode, wherein the soft starting is used for solving the problem of large starting current by gradually increasing the voltage and the current of the motor; the specific operation is that the voltage and the current of the motor are gradually increased when the motor is started, so that the motor is gradually started, the starting current peak value is reduced, and the effect of reducing the starting impact is achieved; the step-down starting solves the problem of large starting current by reducing the power supply voltage; the specific operation is that the power supply voltage is gradually regulated down by the voltage reducer before the motor is started, so that the current is gradually increased, the starting current is reduced, the protection of a power supply system is needed to be considered when the voltage reduction is adopted for starting, and the abnormality of other equipment caused by the too low system voltage is avoided.
And in the t3 period, judging the starting current, wherein the step F is used for judging the starting current so as to prevent the motor from being burnt. And F, judging the starting current, wherein the step F is used for judging the starting current so as to prevent the motor from being burnt. This is because when the permanent magnet motor is started, since the magnetic flux is not yet established, the internal resistance is small, and when a power is applied to the coil, the current is drastically increased, resulting in a large starting current. This can burden the motor and system and even lead to burning out of the motor.
Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.

Claims (10)

1. A control system for starting a permanent magnet motor is characterized in that: the motor control system comprises a controller module (1), a detection module (2), a software module (3) and a mode conversion module (4), wherein the detection module (2) is used for detecting the voltage amplitude and the phase before the motor is started, the detection module (2) can detect the voltage amplitude and the phase when the motor is used as a generator state at the moment before the motor is started, and the software module (3) is used for detecting the initial state and operation before the motor is started; the mode conversion module (4) is used for operating the motor in a current mode or a voltage mode.
2. A permanent magnet motor start control system according to claim 1, wherein: the control system for starting the permanent magnet motor further comprises a starting protection module (5), wherein the starting protection module (5) is used for judging starting current.
3. A permanent magnet motor start control system according to claim 1, wherein: the control system for starting the permanent magnet motor further comprises a temperature judging module (6), wherein the temperature judging module (6) is used for judging the temperature inside the motor, the temperature can be calculated by using magnetic flux phi and stator resistance R, phi is the magnetic flux (Wb) of the motor, id feedback value and Iq feedback value are different from instruction values in a certain time due to the change of the magnetic flux and the resistance, and when the difference exceeds a certain threshold value, starting faults are sent out; at this time, the starting or running current is reduced, the starting is performed again, the temperature judgment is performed, and when the number of continuous judgment exceeds N, namely 3 or 5, the starting fails.
4. A permanent magnet motor start control system according to claim 3, wherein: the control system for starting the permanent magnet motor further comprises a cloud module (7), wherein the cloud module (7) stores motor starting data, starting temperature and starting region position, and after S times of starting are carried out according to the region position, the motor starting data are updated by combining big data analysis.
5. A permanent magnet motor start control system according to claim 1, wherein: the control system for starting the permanent magnet motor further comprises a time triggering module (8) and an alarm module (9), wherein the time triggering module (8) at least stores the time length of one of the times t1, t2 and t3 and performs certain triggering output according to the time period; the method comprises the steps of detecting an initial state of a motor by using a software algorithm, and if the motor is operated in a current mode before the motor is started and the current of the motor is controlled to be 0, enabling the voltage output by a controller to be the same as the power generation voltage amplitude of the motor and the phase to be the same; the rotating speed and the direction of the motor can be calculated according to the voltage amplitude and the phase output by the controller.
6. The control method for starting the permanent magnet motor is characterized by comprising the following steps of:
S1, a mode conversion step, namely converting the operation of the motor into a current mode before the motor is started according to the step of detecting the initial state of the motor before the motor is started;
s2, outputting control, wherein the current of the motor is controlled to be 0;
S3, obtaining a voltage amplitude A Control device and a phase theta Control device angle output by the controller when the input current of the motor is 0;
S4, logically reasoning, namely obtaining a voltage amplitude A Control device and a phase theta Control device angle output by the controller when the input current of the motor is 0; voltage amplitude and phase when the generator is in a state, and according to Eb=4.44 phi f K cos (theta), the rotating speed and direction of the motor are reversely calculated according to the voltage amplitude and phase output by the controller.
7. The method for controlling the start of a permanent magnet motor according to claim 6, further comprising the steps of: decomposing the starting current I into a d-axis current Id and a q-axis current value Iq; the d-axis current Id and the q-axis current value Iq are further divided into a current command value (an identification mark taking a ≡command value) and a current feedback value (an identification mark taking a # -feedback value); the control d-axis current command value Id+=0, and the q-axis current command value Iq++is determined according to the maximum torque control or PI regulation control; the current feedback value is used to correct the motor current input and the control of the motor to be closed loop control.
8. The method for controlling the starting of a permanent magnet motor according to claim 7, wherein: the control method for starting the permanent magnet motor is characterized in that a control period t1 is preset, and the control method comprises the following steps: controlling the command value of the quadrature axis current of the motor to be zero; a command value for controlling the direct current of the motor is zero; and acquiring the counter electromotive force Eb, calculating the amplitude and the phase of the counter electromotive force, and calculating the rotating speed and the rotating direction of the permanent magnet motor according to the calculated phase and amplitude.
9. The method for controlling the starting of a permanent magnet motor according to claim 8, wherein: after the preset control period t1, an operation period t2 is further set, in the period t2, the command value of the quadrature axis current changes in a manner related to time in which a/R is cos (θ), wherein (θ=t2/L is 360, i.e., a value between 0 and 360, L is an adjustable parameter for guaranteeing a value between 0 and 360), where a is a voltage amplitude, and R is a stator resistance; or after the control period t1 is preset, an operation period t2 is further set, and in the period t2, the command value of the direct-axis current changes in a mode related to time in which the command value is a/R sin (θ), wherein (θ=t2/l×360, that is, a value between 0 and 360, L is an adjustable parameter used for guaranteeing a value between 0 and 360), a is a voltage amplitude, and R is a stator resistance.
10. The method for controlling the starting of a permanent magnet motor according to claim 9, wherein: after the preset control period t1, an operation period t3 is further set, and in the t3 period, a step E of protection starting is adopted, and the step F is used for starting the motor in a soft starting or voltage-reducing starting mode, wherein the soft starting is used for solving the problem of large starting current by gradually increasing the voltage and the current of the motor; the specific operation is that the voltage and the current of the motor are gradually increased when the motor is started, so that the motor is gradually started, the starting current peak value is reduced, and the effect of reducing the starting impact is achieved; the step-down starting solves the problem of large starting current by reducing the power supply voltage; the specific operation is that the power voltage is gradually reduced by a step-down device before the motor is started, so that the current is gradually increased, and the starting current is reduced; and F, judging the starting current, wherein the step F is used for judging the starting current so as to prevent the motor from being burnt.
CN202410072312.7A 2024-01-18 2024-01-18 Control system and control method for starting permanent magnet motor Pending CN117914191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410072312.7A CN117914191A (en) 2024-01-18 2024-01-18 Control system and control method for starting permanent magnet motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410072312.7A CN117914191A (en) 2024-01-18 2024-01-18 Control system and control method for starting permanent magnet motor

Publications (1)

Publication Number Publication Date
CN117914191A true CN117914191A (en) 2024-04-19

Family

ID=90681534

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410072312.7A Pending CN117914191A (en) 2024-01-18 2024-01-18 Control system and control method for starting permanent magnet motor

Country Status (1)

Country Link
CN (1) CN117914191A (en)

Similar Documents

Publication Publication Date Title
KR100759696B1 (en) Method and System for Starting a Sensorless Motor
CN103607155B (en) Based on the permagnetic synchronous motor method for controlling position-less sensor of rotatory current vector
CN102263531B (en) Method and apparatus for controlling motor torque
US7388340B2 (en) Driving device of motor
US7538510B2 (en) Controller for motor
CN107968609B (en) Weak magnetic control method and device for permanent magnet synchronous motor
CN104221274A (en) Three-phase synchronous motor drive device
US8754603B2 (en) Methods, systems and apparatus for reducing power loss in an electric motor drive system
JP6463966B2 (en) Motor driving device, motor driving module and refrigeration equipment
CN105099316A (en) Current coordination control method of electrically-excited synchronous motor
JP5403243B2 (en) Control device for permanent magnet synchronous motor
EP3509207B1 (en) Inverter control device and electric motor driving system
EP2755319B1 (en) Control system for synchronous motor
KR101225165B1 (en) Method to control starting of sensorless Permanent Magnet Synchronous Motor
JP2006304462A (en) Motor drive system and control method for permanent magnet motor
US9240744B2 (en) Methods, systems and apparatus for adjusting current and/or torque commands used to control operation of an asynchronous machine
JP5493546B2 (en) Control device for linear permanent magnet synchronous motor
JP4542797B2 (en) Control device for synchronous machine
CN111600517A (en) Method for detecting state of motor before operation
JP3788925B2 (en) Wind power generator using permanent magnet type synchronous generator and its starting method
JP5363129B2 (en) Inverter control device
JP4826550B2 (en) Turbocharger control system with electric motor
KR20000046679A (en) Method and apparatus for controlling speed of synchronous reluctance motor
CN117914191A (en) Control system and control method for starting permanent magnet motor
TWI474607B (en) Synchronous motor control method and control device and synchronous motor using same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination