CN114204879A - Three-level variable frequency speed control system of permanent magnet synchronous motor for magnetic suspension blower - Google Patents
Three-level variable frequency speed control system of permanent magnet synchronous motor for magnetic suspension blower 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/05—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
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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
- H02P25/022—Synchronous motors
- H02P25/024—Synchronous motors controlled by supply frequency
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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
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
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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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/14—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation with three or more levels of voltage
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/50—Reduction of harmonics
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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
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
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- Control Of Ac Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to a three-level variable frequency speed control system of a permanent magnet synchronous motor for a magnetic suspension blower, which comprises a three-level frequency converter and a three-phase filter reactor, wherein the three-level frequency converter is connected with a three-phase filter reactor; the main circuit of the three-level frequency converter comprises a three-phase rectifying circuit, a filter circuit and a three-phase inverter circuit; the input end of the three-phase rectification circuit is connected to the alternating current commercial power; the filter circuit comprises a first capacitor and a second capacitor, and the first capacitor and the second capacitor are connected in series and then connected to the output end of the three-phase rectification circuit; each phase of inverter circuit in the three-phase inverter circuit comprises a first power tube, a second power tube, a third power tube, a fourth power tube, a first diode and a second diode. The invention can reduce the temperature rise of the rotor of the high-speed motor, prolong the service life, reduce the vibration and improve the system efficiency.
Description
Technical Field
The invention relates to the field of motor control, in particular to a three-level variable frequency speed control system of a permanent magnet synchronous motor for a magnetic suspension blower.
Background
The high-speed magnetic suspension air blower usually uses a permanent magnet synchronous motor, and the prior art uses two-level frequency conversion to regulate the speed of the motor, so as to achieve the effect of regulating the output pressure and flow of the air blower. However, the output voltage harmonic ratio of the two-level frequency converter is large and exceeds 30%, so that the temperature rise of a motor rotor is too high and the play is too large. Because the high-temperature characteristics of the rotor permanent magnet material are poor, the demagnetization phenomenon can be generated after long-time high-temperature operation. The high temperature of the rotor causes the rotor to be easily deformed, the rigidity to be poor and the system reliability to be low. The harmonics will generate harmonic magnetic fields on the stator and the rotor will also generate high frequency vibrations. Harmonic loss is also generated due to large harmonic, and the system efficiency is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a three-level variable frequency speed control system of a permanent magnet synchronous motor for a magnetic suspension blower, which reduces the temperature rise of a rotor of a high-speed motor, prolongs the service life, reduces vibration and improves the system efficiency.
The technical scheme for solving the technical problems is as follows: a three-level frequency conversion speed regulation system of a permanent magnet synchronous motor for a magnetic suspension blower comprises a three-level frequency converter and a three-phase filter reactor; the main circuit of the three-level frequency converter comprises a three-phase rectifying circuit, a filter circuit and a three-phase inverter circuit; the input end of the three-phase rectification circuit is connected to an alternating current commercial power; the filter circuit comprises a first capacitor and a second capacitor, and the first capacitor and the second capacitor are connected in series and then connected to the output end of the three-phase rectification circuit; each phase of inverter circuit in the three-phase inverter circuit comprises a first power tube, a second power tube, a third power tube, a fourth power tube, a first diode and a second diode; in each phase inverter circuit, the first power tube, the second power tube, the third power tube and the fourth power tube are sequentially connected in series and then connected to the output end of the three-phase rectifier circuit, the first diode and the second diode are connected in series in the same direction and then connected to the common connection end of the first power tube and the second power tube and the common connection end of the third power tube and the fourth power tube, respectively, and the common connection end of the second power tube and the third power tube is connected to the input end of the permanent magnet synchronous motor for the magnetic suspension blower through the filter reactor of the corresponding phase in the three-phase filter reactor; and the common connection end of the first diode and the second diode in any phase of inverter circuit is connected to the common connection end of the first capacitor and the second capacitor.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, in each phase inverter circuit, the first power tube, the second power tube, the third power tube and the fourth power tube are all composed of an IGBT tube and a freewheeling diode, and the freewheeling diode is reversely connected in parallel at two ends of the IGBT tube; in each phase inverter circuit, the drain of the IGBT in the first power tube is connected to one output end of the three-phase rectifier circuit, the source of the IGBT in the first power tube is connected to the drain of the IGBT in the second power tube, the source of the IGBT in the second power tube is connected to the drain of the IGBT in the third power tube, the source of the IGBT in the third power tube is connected to the drain of the IGBT in the fourth power tube, and the source of the IGBT in the fourth power tube is connected to the other output end of the three-phase rectifier circuit.
The system further comprises a controller, a permanent magnet synchronous motor three-phase current acquisition module and a three-level frequency converter direct-current voltage acquisition module;
the permanent magnet synchronous motor three-phase current acquisition module is used for acquiring three-phase current signals of the permanent magnet synchronous motor;
the three-level frequency converter direct-current voltage acquisition module is used for acquiring direct-current voltage signals in the three-level frequency converter;
the controller is used for obtaining an inversion control signal according to a three-phase current of the permanent magnet synchronous motor and a direct current voltage signal in the three-level frequency converter based on a position sensorless vector control algorithm and a PID (proportion integration differentiation) regulation algorithm, controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, and achieving the purposes of uniformly controlling and regulating a speed link, a current link and a direct current voltage and maintaining the voltage midpoint balance between the first capacitor and the second capacitor.
Further, the controller comprises a magnetic linkage calculation module, a temperature compensation module and a PID regulation control module;
the flux linkage calculation module is used for calculating the rotor flux linkage of the permanent magnet synchronous motor according to the three-phase current signals of the permanent magnet synchronous motor and the direct current voltage signals in the three-level frequency converter;
the temperature compensation module is used for carrying out temperature compensation calculation on a rotor flux linkage of the permanent magnet synchronous motor based on a position-sensorless vector control algorithm to obtain a torque estimation speed and an actual torque current of the permanent magnet synchronous motor;
the PID regulation control module is used for calculating an inversion control signal according to the torque estimation speed and the actual torque current of the permanent magnet synchronous motor based on a PID regulation algorithm, controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, realizing uniform control and regulation of a speed link, a current link and direct-current voltage and maintaining the voltage midpoint balance between the first capacitor and the second capacitor.
Further, the flux linkage calculation module is specifically configured to input the three-phase current signals of the permanent magnet synchronous motor and the direct-current voltage signals in the three-level frequency converter into a flux linkage observer after preprocessing, and estimate the rotor flux linkage of the permanent magnet synchronous motor through the flux linkage observer.
Further, the temperature compensation module is specifically configured to estimate the rotor temperature of the permanent magnet synchronous motor according to the rotor flux linkage based on a corresponding relationship between the rotor temperature of the permanent magnet synchronous motor and the rotor flux linkage; and compensating the rotor temperature of the permanent magnet synchronous motor according to the preset rotor temperature to obtain the torque estimated speed and the actual torque current of the permanent magnet synchronous motor.
Further, the direct current voltage signal in the three-level frequency converter comprises a first direct current voltage signal and a second direct current voltage signal, the first direct current voltage signal is the voltage between the two ends of the first capacitor, and the second direct current voltage signal is the voltage between the two ends of the second capacitor.
Further, the PID regulation control module is specifically used for,
carrying out PID (proportion integration differentiation) regulation on the torque estimation speed and a preset torque given speed to obtain a given torque reference current;
PID adjustment is carried out on the given torque reference current and the actual torque current, and PID adjustment is carried out on the preset given excitation reference current and the actual excitation current measured in advance to obtain an ALPHA value and a BETA value of the reference voltage vector;
and calculating an inversion control signal according to the ALPHA value and the BETA value of the reference voltage vector, and controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, so that the speed link, the current link and the direct-current voltage are uniformly controlled and adjusted, and the voltage midpoint balance between the first capacitor and the second capacitor is maintained.
Based on the three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower, the invention also provides a three-level variable frequency speed control method of the permanent magnet synchronous motor for the magnetic suspension blower.
A three-level frequency control method of a permanent magnet synchronous motor for a magnetic suspension blower is used for controlling the three-level frequency control system of the permanent magnet synchronous motor for the magnetic suspension blower and comprises the following steps,
collecting three-phase current signals of the permanent magnet synchronous motor; collecting direct-current voltage signals in the three-level frequency converter;
based on a position sensorless vector control algorithm and a PID (proportion integration differentiation) regulation algorithm, an inversion control signal is obtained according to the three-phase current of the permanent magnet synchronous motor and the direct-current voltage signal in the three-level frequency converter, the on-off of a corresponding power tube in the three-level frequency converter is controlled according to the inversion control signal, the uniform control regulation of a speed link, a current link and the direct-current voltage is realized, and the voltage midpoint balance between the first capacitor and the second capacitor is maintained.
Based on the three-level variable frequency speed regulation method of the permanent magnet synchronous motor for the magnetic suspension blower, the invention also provides a computer.
A computer comprising a processor, a memory and a computer program stored in the memory, which computer program, when executed by the processor, implements the three-level variable frequency speed control method of a permanent magnet synchronous motor for a magnetic levitation blower as described above.
The invention has the beneficial effects that: a three-level frequency conversion speed regulation system and a method of a permanent magnet synchronous motor for a magnetic suspension blower use a three-level frequency converter to replace a traditional two-level frequency converter, the output of the frequency converter is provided with a filter reactor, harmonic waves output to the motor by the frequency converter are greatly reduced, the temperature rise of a rotor is obviously reduced, and the vibration of the motor is small.
Drawings
FIG. 1 is a schematic circuit structure diagram of a three-level variable frequency speed control system of a PMSM for a magnetic levitation blower according to the present invention;
FIG. 2 is a flow chart of a three-level variable frequency speed control method of a permanent magnet synchronous motor for a magnetic suspension blower according to the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a three-level variable frequency speed control system of a permanent magnet synchronous motor for a magnetic suspension blower comprises a three-level frequency converter and a three-phase filter reactor; the main circuit of the three-level frequency converter comprises a three-phase rectifying circuit (consisting of diodes D1-D6), a filter circuit and a three-phase inverter circuit; the input end of the three-phase rectification circuit is connected to an alternating current commercial power; the filter circuit comprises a first capacitor and a second capacitor (the first capacitor and the second capacitor are respectively represented by C in FIG. 1)d1And Cd2Express), the firstThe capacitor is connected with the second capacitor in series and then connected to the output end of the three-phase rectifying circuit; each phase of the three-phase inverter circuit comprises a first power tube (the first power tube of the A phase is T-shaped)1AThe first power tube of the B phase is represented by T1BThe first power tube of the C phase is represented by T1CShown), a second power tube (the second power tube of the A phase is T2AThe second power tube of the B phase is represented by T2BThe second power tube of the C phase is represented by T2CShown), a third power tube (the third power tube of the A phase is represented by T)3AShowing that the third power tube of the B phase is composed of T3BThe third power tube of the C phase is represented by T3CShown), a fourth power tube (the fourth power tube of the A phase is represented by T4AThe fourth power tube of the B phase is represented by T4BThe fourth power tube of the C phase is represented by T4CRepresented), a first diode (the first diode of the A phase is represented by D)1AThe first diode of the B phase is represented by D1BThe first diode of the C phase is represented by D1CDenoted by D) and a second diode (a phase second diode is denoted by D)2AShowing that the second diode of the B phase is composed of D2BThe second diode of the C phase is represented by D2CRepresents); in each phase inverter circuit, the first power tube, the second power tube, the third power tube and the fourth power tube are sequentially connected in series and then connected to the output end of the three-phase rectifier circuit, the first diode and the second diode are connected in series in the same direction and then connected to the common connection end of the first power tube and the second power tube and the common connection end of the third power tube and the fourth power tube, respectively, and the common connection end of the second power tube and the third power tube is connected to the input end of the permanent magnet synchronous motor for the magnetic suspension blower through the filter reactor of the corresponding phase in the three-phase filter reactor; the common connection terminal of the first diode and the second diode in any phase inverter circuit is connected to the common connection terminal of the first capacitor and the second capacitor (in this embodiment, the common connection terminal of the first diode and the second diode in the phase-a inverter circuit is selected to be connected to the common connection terminal of the first capacitor and the second capacitorAbove).
Specifically, in each phase inverter circuit, each of the first power transistor, the second power transistor, the third power transistor, and the fourth power transistor is composed of an IGBT and a freewheeling diode, and the freewheeling diode is connected in parallel to two ends of the IGBT in an inverse manner; in each phase inverter circuit, the drain of the IGBT in the first power tube is connected to one output end of the three-phase rectifier circuit, the source of the IGBT in the first power tube is connected to the drain of the IGBT in the second power tube, the source of the IGBT in the second power tube is connected to the drain of the IGBT in the third power tube, the source of the IGBT in the third power tube is connected to the drain of the IGBT in the fourth power tube, and the source of the IGBT in the fourth power tube is connected to the other output end of the three-phase rectifier circuit.
The three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower uses the three-level frequency converter to replace the traditional two-level frequency converter, the output of the frequency converter is provided with the filter reactor, the harmonic wave output to the motor by the frequency converter is greatly reduced, the temperature rise of a rotor is obviously reduced, the temperature rise of the rotor is obviously reduced, and the vibration of the permanent magnet synchronous motor is small.
In addition to the above-mentioned scheme for improving hardware to reduce the harmonic wave output from the frequency converter to the motor, reduce the temperature rise of the rotor and reduce the vibration of the motor, the present invention also adopts a software control scheme based on a position-sensorless vector control algorithm to reduce the harmonic wave output from the frequency converter to the motor, reduce the temperature rise of the rotor and reduce the vibration of the motor, and the specific steps are as follows:
in this particular embodiment: the invention relates to a three-level variable frequency speed control system of a permanent magnet synchronous motor for a magnetic suspension blower
The permanent magnet synchronous motor control system also comprises a controller, a three-phase current acquisition module of the permanent magnet synchronous motor and a three-level frequency converter direct-current voltage acquisition module;
the permanent magnet synchronous motor three-phase current acquisition module is used for acquiring three-phase current signals of the permanent magnet synchronous motor;
the three-level frequency converter direct-current voltage acquisition module is used for acquiring direct-current voltage signals in the three-level frequency converter;
the controller is used for obtaining an inversion control signal according to a three-phase current of the permanent magnet synchronous motor and a direct current voltage signal in the three-level frequency converter based on a position sensorless vector control algorithm and a PID (proportion integration differentiation) regulation algorithm, controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, and achieving the purposes of uniformly controlling and regulating a speed link, a current link and a direct current voltage and maintaining the voltage midpoint balance between the first capacitor and the second capacitor.
In particular, the method comprises the following steps of,
the controller comprises a flux linkage calculation module, a temperature compensation module and a PID regulation control module;
the flux linkage calculation module is used for calculating the rotor flux linkage of the permanent magnet synchronous motor according to the three-phase current signals of the permanent magnet synchronous motor and the direct current voltage signals in the three-level frequency converter;
the temperature compensation module is used for carrying out temperature compensation calculation on a rotor flux linkage of the permanent magnet synchronous motor based on a position-sensorless vector control algorithm to obtain a torque estimation speed and an actual torque current of the permanent magnet synchronous motor;
the PID regulation control module is used for calculating an inversion control signal according to the torque estimation speed and the actual torque current of the permanent magnet synchronous motor based on a PID regulation algorithm, controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, realizing uniform control and regulation of a speed link, a current link and direct-current voltage and maintaining the voltage midpoint balance between the first capacitor and the second capacitor.
Further, the flux linkage calculation module is specifically configured to input the three-phase current signals of the permanent magnet synchronous motor and the direct-current voltage signals in the three-level frequency converter into a flux linkage observer after preprocessing, and estimate the rotor flux linkage of the permanent magnet synchronous motor through the flux linkage observer.
Further, the temperature compensation module is specifically configured to estimate the rotor temperature of the permanent magnet synchronous motor according to the rotor flux linkage based on a corresponding relationship between the rotor temperature of the permanent magnet synchronous motor and the rotor flux linkage; and compensating the rotor temperature of the permanent magnet synchronous motor according to the preset rotor temperature to obtain the torque estimated speed and the actual torque current of the permanent magnet synchronous motor.
Further, the direct current voltage signal in the three-level frequency converter comprises a first direct current voltage signal and a second direct current voltage signal, the first direct current voltage signal is the voltage between the two ends of the first capacitor, and the second direct current voltage signal is the voltage between the two ends of the second capacitor.
Further, the PID regulation control module is specifically used for,
carrying out PID (proportion integration differentiation) regulation on the torque estimation speed and a preset torque given speed to obtain a given torque reference current;
PID adjustment is carried out on the given torque reference current and the actual torque current, and PID adjustment is carried out on the preset given excitation reference current and the actual excitation current measured in advance to obtain an ALPHA value and a BETA value of the reference voltage vector;
and calculating an inversion control signal according to the ALPHA value and the BETA value of the reference voltage vector, and controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, so that the speed link, the current link and the direct-current voltage are uniformly controlled and adjusted, and the voltage midpoint balance between the first capacitor and the second capacitor is maintained.
In the three-phase inverter circuit, the power tube of each phase all is equipped with four ways, and the comparison of contravariant control signal division is more meticulous for can be more accurate, control PMSM's input voltage steadily.
In the three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower, on the basis of reducing the harmonic wave through hardware and reducing the temperature rise of the rotor, the temperature compensation is carried out on the permanent magnet synchronous motor through software control, so that the harmonic wave is further reduced and the temperature rise of the rotor is further reduced.
Based on the three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower, the invention also provides a three-level variable frequency speed control method of the permanent magnet synchronous motor for the magnetic suspension blower.
As shown in fig. 2, a three-level variable frequency speed control method of a permanent magnet synchronous motor for a magnetic suspension blower, which is used for controlling the three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower, comprises the following steps,
collecting three-phase current signals of the permanent magnet synchronous motor; collecting direct-current voltage signals in the three-level frequency converter;
based on a position sensorless vector control algorithm and a PID (proportion integration differentiation) regulation algorithm, an inversion control signal is obtained according to the three-phase current of the permanent magnet synchronous motor and the direct-current voltage signal in the three-level frequency converter, the on-off of a corresponding power tube in the three-level frequency converter is controlled according to the inversion control signal, the uniform control regulation of a speed link, a current link and the direct-current voltage is realized, and the voltage midpoint balance between the first capacitor and the second capacitor is maintained.
Based on the three-level variable frequency speed regulation method of the permanent magnet synchronous motor for the magnetic suspension blower, the invention also provides a computer.
A computer comprising a processor, a memory and a computer program stored in the memory, which computer program, when executed by the processor, implements the three-level variable frequency speed control method of a permanent magnet synchronous motor for a magnetic levitation blower as described above.
A three-level frequency conversion speed regulation system and method of a permanent magnet synchronous motor for a magnetic suspension blower use a three-level frequency converter to replace a traditional two-level frequency converter, the output of the frequency converter is provided with a filter reactor, and harmonic waves output to the motor by the frequency converter are greatly reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a three level variable frequency speed control system of PMSM for magnetic suspension blower which characterized in that: the three-level frequency converter comprises a three-level frequency converter and a three-phase filter reactor; the main circuit of the three-level frequency converter comprises a three-phase rectifying circuit, a filter circuit and a three-phase inverter circuit; the input end of the three-phase rectification circuit is connected to an alternating current commercial power; the filter circuit comprises a first capacitor and a second capacitor, and the first capacitor and the second capacitor are connected in series and then connected to the output end of the three-phase rectification circuit; each phase of inverter circuit in the three-phase inverter circuit comprises a first power tube, a second power tube, a third power tube, a fourth power tube, a first diode and a second diode; in each phase inverter circuit, the first power tube, the second power tube, the third power tube and the fourth power tube are sequentially connected in series and then connected to the output end of the three-phase rectifier circuit, the first diode and the second diode are connected in series in the same direction and then connected to the common connection end of the first power tube and the second power tube and the common connection end of the third power tube and the fourth power tube, respectively, and the common connection end of the second power tube and the third power tube is connected to the input end of the permanent magnet synchronous motor for the magnetic suspension blower through the filter reactor of the corresponding phase in the three-phase filter reactor; and the common connection end of the first diode and the second diode in any phase of inverter circuit is connected to the common connection end of the first capacitor and the second capacitor.
2. The three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower as claimed in claim 1, characterized in that: in each phase inverter circuit, the first power tube, the second power tube, the third power tube and the fourth power tube are all composed of an IGBT tube and a fly-wheel diode, and the fly-wheel diode is reversely connected in parallel at two ends of the IGBT tube; in each phase inverter circuit, the drain of the IGBT in the first power tube is connected to one output end of the three-phase rectifier circuit, the source of the IGBT in the first power tube is connected to the drain of the IGBT in the second power tube, the source of the IGBT in the second power tube is connected to the drain of the IGBT in the third power tube, the source of the IGBT in the third power tube is connected to the drain of the IGBT in the fourth power tube, and the source of the IGBT in the fourth power tube is connected to the other output end of the three-phase rectifier circuit.
3. The three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower according to claim 1 or 2, characterized in that: the permanent magnet synchronous motor control system also comprises a controller, a three-phase current acquisition module of the permanent magnet synchronous motor and a three-level frequency converter direct-current voltage acquisition module;
the permanent magnet synchronous motor three-phase current acquisition module is used for acquiring three-phase current signals of the permanent magnet synchronous motor;
the three-level frequency converter direct-current voltage acquisition module is used for acquiring direct-current voltage signals in the three-level frequency converter;
the controller is used for obtaining an inversion control signal according to a three-phase current of the permanent magnet synchronous motor and a direct current voltage signal in the three-level frequency converter based on a position sensorless vector control algorithm and a PID (proportion integration differentiation) regulation algorithm, controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, and achieving the purposes of uniformly controlling and regulating a speed link, a current link and a direct current voltage and maintaining the voltage midpoint balance between the first capacitor and the second capacitor.
4. The three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower according to claim 3, characterized in that: the controller comprises a flux linkage calculation module, a temperature compensation module and a PID regulation control module;
the flux linkage calculation module is used for calculating the rotor flux linkage of the permanent magnet synchronous motor according to the three-phase current signals of the permanent magnet synchronous motor and the direct current voltage signals in the three-level frequency converter;
the temperature compensation module is used for carrying out temperature compensation calculation on a rotor flux linkage of the permanent magnet synchronous motor based on a position-sensorless vector control algorithm to obtain a torque estimation speed and an actual torque current of the permanent magnet synchronous motor;
the PID regulation control module is used for calculating an inversion control signal according to the torque estimation speed and the actual torque current of the permanent magnet synchronous motor based on a PID regulation algorithm, controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, realizing uniform control and regulation of a speed link, a current link and direct-current voltage and maintaining the voltage midpoint balance between the first capacitor and the second capacitor.
5. The three-level variable frequency speed control system of the PMSM for the magnetic levitation blower according to claim 4, characterized in that: the flux linkage calculation module is specifically configured to input a three-phase current signal of the permanent magnet synchronous motor and a direct-current voltage signal in the three-level frequency converter into a flux linkage observer after preprocessing, and estimate a rotor flux linkage of the permanent magnet synchronous motor through the flux linkage observer.
6. The three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower as claimed in claim 5, wherein: the temperature compensation module is specifically used for estimating the rotor temperature of the permanent magnet synchronous motor according to the rotor flux linkage based on the corresponding relation between the rotor temperature of the permanent magnet synchronous motor and the rotor flux linkage; and compensating the rotor temperature of the permanent magnet synchronous motor according to the preset rotor temperature to obtain the torque estimated speed and the actual torque current of the permanent magnet synchronous motor.
7. The three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower as claimed in claim 6, wherein: direct current voltage signal among the three-level frequency converter includes first direct current voltage signal and second direct current voltage signal, first direct current voltage signal does voltage between the first electric capacity both ends, second direct current voltage signal does voltage between the second electric capacity both ends.
8. The three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower according to claim 7, characterized in that: the PID control module is specifically configured to,
carrying out PID (proportion integration differentiation) regulation on the torque estimation speed and a preset torque given speed to obtain a given torque reference current;
PID adjustment is carried out on the given torque reference current and the actual torque current, and PID adjustment is carried out on the preset given excitation reference current and the actual excitation current measured in advance to obtain an ALPHA value and a BETA value of the reference voltage vector;
and calculating an inversion control signal according to the ALPHA value and the BETA value of the reference voltage vector, and controlling the on-off of a corresponding power tube in the three-level frequency converter according to the inversion control signal, so that the speed link, the current link and the direct-current voltage are uniformly controlled and adjusted, and the voltage midpoint balance between the first capacitor and the second capacitor is maintained.
9. A three-level frequency conversion speed regulation method of a permanent magnet synchronous motor for a magnetic suspension blower is characterized by comprising the following steps: the three-level variable frequency speed control method of the permanent magnet synchronous motor for the magnetic suspension blower is used for controlling the three-level variable frequency speed control system of the permanent magnet synchronous motor for the magnetic suspension blower according to any one of claims 1 to 8, and comprises the following steps,
collecting three-phase current signals of the permanent magnet synchronous motor; collecting direct-current voltage signals in the three-level frequency converter;
based on a position sensorless vector control algorithm and a PID (proportion integration differentiation) regulation algorithm, an inversion control signal is obtained according to the three-phase current of the permanent magnet synchronous motor and the direct-current voltage signal in the three-level frequency converter, the on-off of a corresponding power tube in the three-level frequency converter is controlled according to the inversion control signal, the uniform control regulation of a speed link, a current link and the direct-current voltage is realized, and the voltage midpoint balance between the first capacitor and the second capacitor is maintained.
10. A computer, characterized by: comprising a processor, a memory and a computer program stored in the memory, which computer program, when being executed by the processor, carries out the method of three-level variable frequency speed regulation of a permanent magnet synchronous motor for a magnetic levitation blower as set forth in claim 9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2132110C1 (en) * | 1998-03-25 | 1999-06-20 | Мищенко Владислав Алексеевич | Method for optimal vector control of induction electric motor and electric drive which implements said method |
| JP2004015858A (en) * | 2002-06-04 | 2004-01-15 | Meidensha Corp | Sensorless control system of pm motor position |
| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
| CN109510473A (en) * | 2018-12-11 | 2019-03-22 | 河北工程大学 | A kind of three phase converter and method for controlling frequency conversion |
| CN110277942A (en) * | 2019-05-14 | 2019-09-24 | 哈尔滨理工大学 | Simplified three-level inverter drives control system for permanent-magnet synchronous motor |
-
2021
- 2021-11-17 CN CN202111360696.5A patent/CN114204879B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2132110C1 (en) * | 1998-03-25 | 1999-06-20 | Мищенко Владислав Алексеевич | Method for optimal vector control of induction electric motor and electric drive which implements said method |
| JP2004015858A (en) * | 2002-06-04 | 2004-01-15 | Meidensha Corp | Sensorless control system of pm motor position |
| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
| CN109510473A (en) * | 2018-12-11 | 2019-03-22 | 河北工程大学 | A kind of three phase converter and method for controlling frequency conversion |
| CN110277942A (en) * | 2019-05-14 | 2019-09-24 | 哈尔滨理工大学 | Simplified three-level inverter drives control system for permanent-magnet synchronous motor |
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