CN113691177A - Bus voltage control method for driving system of permanent magnet synchronous motor without electrolytic capacitor - Google Patents
Bus voltage control method for driving system of permanent magnet synchronous motor without electrolytic capacitor 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
- 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
- H02P21/13—Observer control, e.g. using Luenberger observers or Kalman filters
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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
- H02P21/22—Current control, e.g. using a current control loop
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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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Abstract
A method for controlling bus voltage of a driving system of a permanent magnet synchronous motor without electrolytic capacitor belongs to the technical field of motor control. The invention aims at the problem that when the speed of the existing electrolytic capacitor-free permanent magnet synchronous motor driving system is reduced in the regenerative braking process, the voltage on the bus side is over-voltage due to the fact that the control parameters of a controller cannot be adjusted on line. The method comprises the following steps: setting the Voltage regulator to the bus Voltage udcAnd bus voltage limit udc‑maxThe bus voltage difference value is adjusted, thereby realizing the purpose of setting the q-axis current
To reduce motor droopA speed rate; proportional coefficient K of voltage regulator adjusted in real timePThe adjustment of the bus voltage difference value is realized; coefficient of proportionality KPThe obtaining method comprises the following steps: calculating to obtain standard q-axis current
Calculating to obtain the proportional coefficient variation delta KpDetermining the absolute value of the ratio coefficient, and changing the proportional coefficient by delta KpAfter being integrated by an integration module, the integral is compared with an initial value K of a proportionality coefficientp0Adding to obtain a proportionality coefficient KP. The invention can realize the overvoltage prevention of the bus side.
Description
Technical Field
The invention relates to a bus voltage control method of a driving system of a permanent magnet synchronous motor without electrolytic capacitors, and belongs to the technical field of motor control.
Background
The three-phase input electrolytic capacitor permanent magnet synchronous motor realizes the smoothness and the stability of the bus voltage through the large-capacity electrolytic capacitor, and the service life of the electrolytic capacitor is short, so that the service life of a driving system is limited. The use of thin film capacitors by the motor system not only extends the life of the drive system, but also enables lower Total Harmonic Distortion (THD) in the grid current. However, the use of the thin film capacitor causes a reduction in the capacitance value of the bus capacitor, which makes the regenerative braking process of the electrolytic capacitor-less driving system face problems such as bus voltage overvoltage.
At present, there are hardware and software control solutions for the condition of bus voltage overvoltage for the non-electrolytic capacitor driving system respectively. The hardware scheme is that an auxiliary brake resistor controlled by the switch device is connected in parallel on the bus side, and the additional hardware mode not only needs to increase the capacity of a driving system, but also increases the cost of the system. The software control scheme is to reduce the motor deceleration rate and increase the motor losses by controlling a given current in the regenerative braking mode, including controlling the q-axis current by the voltage controller to reduce the motor deceleration rate and controlling the d-axis current by the loss controller to maximize the motor losses. However, the optimal control parameters of the controller have different values under different working conditions, and the inappropriate value of the control parameters can result in poor dynamic performance of the system.
In the existing driving system of the permanent magnet synchronous motor without the electrolytic capacitor, when the bus side thin film capacitor replaces the electrolytic capacitor with a large capacitance value and the speed and load are reduced in the regenerative braking process of the motor, the problem of overvoltage of the bus side voltage is easily caused because the control parameters of the controller cannot be timely and effectively adjusted.
Disclosure of Invention
The invention provides a bus voltage control method of a permanent magnet synchronous motor driving system without electrolytic capacitor, aiming at the problem of overvoltage of bus side voltage caused by incapability of adjusting control parameters of a controller on line when the existing permanent magnet synchronous motor driving system without electrolytic capacitor is decelerated in the regenerative braking process.
The invention relates to a method for controlling the bus voltage of a driving system of a permanent magnet synchronous motor without electrolytic capacitor, which comprises the following steps,
setting the Voltage regulator to the bus Voltage udcAnd bus voltage limit udc-maxThe bus voltage difference value is adjusted, thereby realizing the purpose of setting the q-axis current
To reduce the motor deceleration rate;
the voltage regulator has a real-time adjusted proportionality coefficient KPThe adjustment of the bus voltage difference value is realized, and the proportionality coefficient KPThe obtaining method comprises the following steps:
according to the current given q-axis current
And collecting the obtained current actual q-axis current iqCalculating to obtain standard q-axis current
Standard q-axis current
Minus a given q-axis current
Is multiplied by stepThe length n is used for obtaining the proportional coefficient variation delta KpAbsolute value of (d), according to the standard q-axis current
Positive and negative determination of the proportionality coefficient variation Δ KpPositive and negative, change the proportionality coefficient by delta KpAfter being integrated by an integration module, the integral is compared with an initial value K of a proportionality coefficientp0Adding to obtain a proportionality coefficient KP。
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the given q-axis current is obtained
Comprises obtaining a q-axis current set-point of the voltage loop output
The voltage regulator is a voltage PI regulator, and the voltage regulator obtains a given current-limited current value after the regulation result of the bus voltage difference value is limited by the voltage ring current limiting unit
By using a given current-limited current value through a compensation unit
For the current actual q-axis current iqCompensating to obtain the given value of q-axis current output by the voltage loop
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the given q-axis current is obtained
Further comprises obtaining a given q-axis current output by the speed loop
Will set the rotation speed
Subtracting the observed speed
The difference value is regulated by a rotating speed regulator and then limited by a rotating speed ring current limiting unit to obtain the given q-axis current output by a rotating speed ring
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the given q-axis current is output by a rotating speed ring
Q-axis current setpoint output by sum voltage loop
Adding to obtain a given q-axis current
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the observation rotating speed
By a rotational speed position observer according to a given alpha axis voltage u on a two-phase stationary coordinate systemα *Given beta axis voltage u on a two phase stationary frameβ *Alpha axis current i on a two phase stationary frameαAnd beta axis current i on two-phase stationary coordinate systemβAnd (6) calculating.
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the standard q-axis current
The calculating method comprises the following steps:
wherein n ispIs the number of pole pairs, psi, of the rotorfFor rotor flux linkage, omegam0As steady value of the rotational speed, KiIs an integral coefficient of the voltage regulator, udc0Is a steady state value of the bus voltage, CdcIs the capacitance value of the bus capacitor.
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the actual q-axis current iqThe obtaining process comprises the following steps:
a-phase current i output to a three-phase inverteraPhase i of b-phase currentbAnd c-phase current icClark conversion and Park conversion are carried out in sequence to obtain actual q-axis current iq。
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the compensation unit adopts a given current-limited current value
For the current actual q-axis current iqThe method for compensating comprises the following steps:
when the actual q-axis current iqWhen the current value is more than 0, the current value after current limiting is given
Compensating the current actual q-axis current iq to enable the output q-axis current to be given value
Is 0;
when the actual q-axis current iqWhen the current value is less than or equal to 0, giving the current value after current limiting
For the current actual qCompensating the shaft current iq to enable the output q-shaft current to be given value
Equal to a given current-limited current value
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the rotating speed is observed
The value range of (A) is 0.2-0.9 times of rated rotation speed.
According to the method for controlling the bus voltage of the driving system of the electrolytic capacitor-free permanent magnet synchronous motor, the process of adjusting the bus voltage difference by the voltage regulator comprises the following steps: proportionality coefficient K to be adjusted in real timePAnd assigning a PI parameter to the voltage regulator, and forming closed-loop control on the bus voltage difference by adopting the updated voltage regulator.
The invention has the beneficial effects that:
the invention changes the proportional coefficient variable delta K through real timepTo adjust the proportionality coefficient KPThe motor is an optimal value, the purpose of preventing overvoltage can be effectively achieved, the dynamic performance of a driving system is improved, and the optimal performance of the motor is ensured. The problems of high cost and low power density of a driving system caused by the parallel connection of auxiliary brake resistors in a hardware scheme are effectively solved.
The method of the invention realizes the real-time calculation of the optimal parameters of the controller in the regenerative braking operation of the driving system, thereby realizing the purpose of overvoltage prevention at the bus side and higher dynamic performance of the driving system.
Drawings
FIG. 1 is a block diagram of the control system of the method for controlling the bus voltage of the driving system of the permanent magnet synchronous motor without the electrolytic capacitor according to the present invention; in the figure iq-minFor the minimum value of the output current of the speed regulator, iq-maxIs the maximum value of the output current of the speed regulator,
for a given q-axis current, i, on a two-phase rotating coordinatedIs the actual d-axis current, i, on a two-phase rotating coordinateqIs the actual q-axis current on the two-phase rotating coordinate,
for observation angle, AC is the AC source;
FIG. 2 is a waveform of various variables when the motor speed is reduced from 75Hz to 0Hz and no load is applied in the specific embodiment; in the figure, n is the rotating speed;
FIG. 3 is a waveform diagram of various variables during sudden unloading of a 30N m load during sudden increase of the motor speed from 5Hz to 75Hz in the specific embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
First embodiment, referring to fig. 1, the present invention provides a method for controlling bus voltage of a driving system of a permanent magnet synchronous motor without electrolytic capacitor, including,
setting the Voltage regulator to the bus Voltage udcAnd bus voltage limit udc-maxThe bus voltage difference value is adjusted, thereby realizing the purpose of setting the q-axis current
To reduce the motor deceleration rate;
the voltage regulator has a real-time adjusted proportionality coefficient KPThe adjustment of the bus voltage difference value is realized, and the proportionality coefficient KPThe obtaining method comprises the following steps:
according to the current given q-axis current
And collecting the obtained current actual q-axis current iqCalculating to obtain standard q-axis current
Standard q-axis current
Minus a given q-axis current
Multiplying the absolute value of the difference by the step length n to obtain the change quantity delta K of the proportionality coefficientpAbsolute value of (d), according to the standard q-axis current
Positive and negative determination of the proportionality coefficient variation Δ KpPositive and negative, change the proportionality coefficient by delta KpAfter being integrated by an integration module, the integral is compared with an initial value K of a proportionality coefficientp0Adding to obtain a proportionality coefficient KP。
In the present embodiment, the standard q-axis current
Minus a given q-axis current
Multiplying the absolute value of the difference by the step length n to obtain the change quantity delta K of the proportionality coefficientpAbsolute value of (1 | Δ K)pAccording to standard q-axis current
Positive and negative of (1) determining Δ KpPositive and negative, real-time calculation ofObtaining the proportional coefficient variation delta Kp。
The bus voltage udcThe output voltage of the diode rectifier bridge of fig. 1.
The embodiment changes the change amount Δ K of the proportionality coefficient through real timepAdjustable proportionality coefficient KPIs an optimal value, so that the motor performance can be determined to be optimal.
Further, as shown in connection with FIG. 1, a given q-axis current is obtained
Comprises obtaining a q-axis current set-point of the voltage loop output
The voltage regulator is a voltage PI regulator, and the voltage regulator obtains a given current-limited current value after the regulation result of the bus voltage difference value is limited by the voltage ring current limiting unit
By using a given current-limited current value through a compensation unit
For the current actual q-axis current iqCompensating to obtain the given value of q-axis current output by the voltage loop
Current actual q-axis current iqAnd setting the current value after current limiting
After the q-axis current is input to the compensation unit together, the given value of the q-axis current output by the voltage loop is obtained
Still further, as shown in connection with FIG. 1, a given q-axis current is obtained
Further comprises obtaining a given q-axis current output by the speed loop
Will set the rotation speed
Subtracting the observed speed
The difference value is regulated by a rotating speed regulator and then limited by a rotating speed ring current limiting unit to obtain the given q-axis current output by a rotating speed ring
Still further, as shown in connection with FIG. 1, a given q-axis current output by the speed loop
Q-axis current setpoint output by sum voltage loop
Adding to obtain a given q-axis current
Obtained given q-axis current
And the overvoltage prevention control can be realized.
Still further, as shown in connection with FIG. 1, the observed rotational speed
By a rotational speed position observer according to a given alpha axis voltage u on a two-phase stationary coordinate systemα *Given beta axis voltage u on a two phase stationary frameβ *Alpha axis current i on a two phase stationary frameαAnd beta axis current i on two-phase stationary coordinate systemβAnd (6) calculating.
Still further, as shown in connection with FIG. 1, the standard q-axis current
The calculating method comprises the following steps:
wherein n ispIs the number of pole pairs, psi, of the rotorfFor rotor flux linkage, omegam0As steady value of the rotational speed, KiIs an integral coefficient of the voltage regulator, udc0Is a steady state value of the bus voltage, CdcIs the capacitance value of the bus capacitor.
Still further, as shown in connection with FIG. 1, the actual q-axis current iqThe obtaining process comprises the following steps:
a-phase current i output to a three-phase inverteraPhase i of b-phase currentbAnd c-phase current icClark conversion and Park conversion are carried out in sequence to obtain actual q-axis current iq。
Still further, as shown in fig. 1, the compensation unit adopts a given current-limited current value
For the current actual q-axis current iqThe method for compensating comprises the following steps:
when the actual q-axis current iqWhen the current value is more than 0, the current value after current limiting is given
Compensating the current actual q-axis current iq to enable the output q-axis current to be given value
Is 0;
when the actual q-axis current iqWhen the current value is less than or equal to 0, giving the current value after current limiting
Compensating the current actual q-axis current iq to enable the output q-axis current to be given value
Equal to a given current-limited current value
Still further, as shown in FIG. 1, the rotational speed is observed
The value range of (A) is 0.2-0.9 times of rated rotation speed.
Still further, the voltage regulator adjusts the proportionality coefficient K through real timePThe bus voltage difference value adjusting process comprises the following steps: proportionality coefficient K to be adjusted in real timePAnd assigning a PI parameter to the voltage regulator, and forming closed-loop control on the bus voltage difference by adopting the updated voltage regulator.
In the method of the present invention, a q-axis current is given
With actual q-axis current iqThe difference is input to a current regulator to give d-axis current
With fruitInter d-axis current idThe difference value of the two phase d-axis voltage is input into a current regulator, and a given d-axis voltage on a two-phase rotating coordinate is obtained through calculation
And a given q-axis voltage on a two-phase rotation coordinate
Then, a given alpha axis voltage u on the two-phase static coordinate system is obtained through Park inverse transformationα *And a given beta-axis voltage u on a two-phase stationary frameβ *；uα *And uβ *And the PWM modulation is carried out to be used as a control signal of the three-phase inverter.
FIG. 1 includes a position sensorless vector control section, KpA parameter setting section and a voltage controller section; the voltage controller part is shown as a dotted line frame in fig. 1 and comprises a voltage regulator, a voltage loop current limiting unit and a compensation unit; the vector control part without the position sensor comprises an inner ring, an outer ring, a speed regulator, a current regulator and a current regulator, wherein the inner ring is a current ring, the outer ring is a speed ring, the difference between a reference value and a feedback value of the rotating speed is regulated by the speed regulator, the difference between a reference value and a feedback value of the direct-axis current is regulated by the current regulator, and the difference between a reference value and a feedback value of the quadrature-axis current is regulated by the current regulator. The angle and position of the motor are obtained by a position, speed observer. And the three-phase current of the motor stator is converted by Clark and Park coordinates to obtain d-axis and q-axis currents under a two-phase rotating coordinate system. And the SVPWM is adopted to control the three-phase inverter, and finally the permanent magnet synchronous motor control is realized.
The specific embodiment is as follows:
the validity of the method is verified as follows:
the effectiveness of the anti-overvoltage control method provided by the invention is verified on a driving system platform of the electrolytic capacitor-free permanent magnet synchronous motor. The parameters of the experimental platform are set as follows: the power grid voltage is 380V, the power grid frequency is 50Hz, the direct current bus capacitance is film capacitance, the capacitance value is 30 muF, the direct axis inductance is 7.5mH, the alternating axis inductance is 17.2mH, the rotor flux linkage is 0.5Wb, the number of rotor pole pairs is 3, the rated power is 11kW, the rated rotation speed is 1500r/min, and the stator resistance is 0.275 omega.
All control algorithms in the experiment are completed in the DSP STM32F 28075. The update frequency of the switch and the current and voltage sampling values is set to be 8 kHz. Bus voltage limit udc-maxSet to 618V.
As shown in fig. 2, when the motor speed command is suddenly decreased from 75Hz to 0Hz without applying a load, the dc-side bus voltage is controlled to be about 618V.
As shown in fig. 3, when the load of 30N · m is suddenly unloaded during the sudden increase of the motor speed command from 5Hz to 75Hz, the dc-side bus voltage is controlled to be around 618V.
Therefore, the method provided by the invention has the advantages that the bus voltage can be effectively controlled in the regenerative braking process of the motor, and the dynamic performance of the motor is ensured.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. A method for controlling the bus voltage of a driving system of a permanent magnet synchronous motor without electrolytic capacitor is characterized by comprising the following steps,
setting the Voltage regulator to the bus Voltage udcAnd bus voltage limit udc-maxThe bus voltage difference value is adjusted, thereby realizing the purpose of setting the q-axis current
To reduce the motor deceleration rate;
the voltage regulationProportional coefficient K of device through real-time adjustmentPThe adjustment of the bus voltage difference value is realized, and the proportionality coefficient KPThe obtaining method comprises the following steps:
according to the current given q-axis current
And collecting the obtained current actual q-axis current iqCalculating to obtain standard q-axis current
Standard q-axis current
Minus a given q-axis current
Multiplying the absolute value of the difference by the step length n to obtain the change quantity delta K of the proportionality coefficientpAbsolute value of (d), according to the standard q-axis current
Positive and negative determination of the proportionality coefficient variation Δ KpPositive and negative, change the proportionality coefficient by delta KpAfter being integrated by an integration module, the integral is compared with an initial value K of a proportionality coefficientp0Adding to obtain a proportionality coefficient KP。
2. The electrolytic capacitor-free permanent magnet synchronous motor drive system bus voltage control method according to claim 1, wherein a given q-axis current is obtained
Comprises obtaining a q-axis current set-point of the voltage loop output
The voltage regulator is a voltage PI regulatorThe voltage regulator is used for obtaining a given current-limited current value after current limitation through the current limiting unit of the voltage loop to obtain the adjustment result of the bus voltage difference value
By using a given current-limited current value through a compensation unit
For the current actual q-axis current iqCompensating to obtain the given value of q-axis current output by the voltage loop
3. The electrolytic capacitor-free permanent magnet synchronous motor drive system bus voltage control method according to claim 2, wherein a given q-axis current is obtained
Further comprises obtaining a given q-axis current output by the speed loop
Will set the rotation speed
Subtracting the observed speed
The difference value is regulated by a rotating speed regulator and then limited by a rotating speed ring current limiting unit to obtain the given q-axis current output by a rotating speed ring
4. The electrolytic-less capacitor of claim 3A bus voltage control method of a permanent magnet synchronous motor driving system is characterized in that given q-axis current output by a rotating speed ring
Q-axis current setpoint output by sum voltage loop
Adding to obtain a given q-axis current
5. The electrolytic capacitor-less permanent magnet synchronous motor drive system bus voltage control method according to claim 4,
the observed rotation speed
By a rotational speed position observer according to a given alpha axis voltage u on a two-phase stationary coordinate systemα *Given beta axis voltage u on a two phase stationary frameβ *Alpha axis current i on a two phase stationary frameαAnd beta axis current i on two-phase stationary coordinate systemβAnd (6) calculating.
6. The electrolytic capacitor-less permanent magnet synchronous motor drive system bus voltage control method according to claim 5,
standard q-axis current
The calculating method comprises the following steps:
wherein n ispIs the number of pole pairs, psi, of the rotorfFor the rotor to be magneticChain, omegam0As steady value of the rotational speed, KiIs an integral coefficient of the voltage regulator, udc0Is a steady state value of the bus voltage, CdcIs the capacitance value of the bus capacitor.
7. The electrolytic capacitor-free permanent magnet synchronous motor drive system bus voltage control method according to claim 6, wherein the actual q-axis current iqThe obtaining process comprises the following steps:
a-phase current i output to a three-phase inverteraPhase i of b-phase currentbAnd c-phase current icClark conversion and Park conversion are carried out in sequence to obtain actual q-axis current iq。
8. The electrolytic capacitor-free permanent magnet synchronous motor drive system bus voltage control method according to claim 7, wherein the compensation unit adopts a given current-limited current value
For the current actual q-axis current iqThe method for compensating comprises the following steps:
when the actual q-axis current iqWhen the current value is more than 0, the current value after current limiting is given
Compensating the current actual q-axis current iq to enable the output q-axis current to be given value
Is 0;
when the actual q-axis current iqWhen the current value is less than or equal to 0, giving the current value after current limiting
For the current actual q-axis current iqCompensating to output a given value of q-axis current
Equal to a given current-limited current value
9. The electrolytic capacitor-free permanent magnet synchronous motor drive system bus voltage control method according to claim 8, wherein the observed rotation speed
The value range of (A) is 0.2-0.9 times of rated rotation speed.
10. The electrolytic capacitor-free permanent magnet synchronous motor drive system bus voltage control method according to claim 9, wherein the adjustment process of the bus voltage difference by the voltage regulator comprises: proportionality coefficient K to be adjusted in real timePAnd assigning a PI parameter to the voltage regulator, and forming closed-loop control on the bus voltage difference by adopting the updated voltage regulator.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301361A (en) * | 2021-12-20 | 2022-04-08 | 浙江大学 | Control method of electrolytic capacitor-free permanent magnet synchronous motor driving system based on bus current control |
| CN114759851A (en) * | 2022-05-20 | 2022-07-15 | 哈尔滨工业大学 | Overvoltage prevention control method for driving system of permanent magnet synchronous motor without electrolytic capacitor |
| CN114785230A (en) * | 2022-06-20 | 2022-07-22 | 中山大洋电机股份有限公司 | Overvoltage suppression method for direct current bus film capacitor of permanent magnet synchronous motor |
| CN115498937A (en) * | 2022-08-03 | 2022-12-20 | 浙江大学 | Motor rapid shutdown control system and method with novel protection function |
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| CN106655947A (en) * | 2016-10-24 | 2017-05-10 | 东南大学 | Permanent magnet synchronous motor control algorithm for improving transient stability of small capacity dc bus capacitor voltage |
| CN106982022A (en) * | 2017-04-27 | 2017-07-25 | 广东工业大学 | A kind of starting method of no electrolytic capacitor inverter permagnetic synchronous motor |
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| CN106655947A (en) * | 2016-10-24 | 2017-05-10 | 东南大学 | Permanent magnet synchronous motor control algorithm for improving transient stability of small capacity dc bus capacitor voltage |
| CN106982022A (en) * | 2017-04-27 | 2017-07-25 | 广东工业大学 | A kind of starting method of no electrolytic capacitor inverter permagnetic synchronous motor |
| CN111740670A (en) * | 2019-06-04 | 2020-10-02 | 哈尔滨工业大学 | Overvoltage prevention control method for driving system of electrolytic capacitor-free permanent magnet synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114301361A (en) * | 2021-12-20 | 2022-04-08 | 浙江大学 | Control method of electrolytic capacitor-free permanent magnet synchronous motor driving system based on bus current control |
| CN114301361B (en) * | 2021-12-20 | 2024-01-30 | 浙江大学 | Control method of electrolytic capacitor-free permanent magnet synchronous motor driving system based on bus current control |
| CN114759851A (en) * | 2022-05-20 | 2022-07-15 | 哈尔滨工业大学 | Overvoltage prevention control method for driving system of permanent magnet synchronous motor without electrolytic capacitor |
| CN114785230A (en) * | 2022-06-20 | 2022-07-22 | 中山大洋电机股份有限公司 | Overvoltage suppression method for direct current bus film capacitor of permanent magnet synchronous motor |
| CN114785230B (en) * | 2022-06-20 | 2022-11-04 | 中山大洋电机股份有限公司 | Overvoltage suppression method for direct current bus film capacitor of permanent magnet synchronous motor |
| CN115498937A (en) * | 2022-08-03 | 2022-12-20 | 浙江大学 | Motor rapid shutdown control system and method with novel protection function |
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