A high-speed motor current source inverter decoupling control method and system

Abstract

The application discloses a high-speed motor current source inverter decoupling control method and system. The application firstly realizes current loop complex vector decoupling and voltage loop feedforward decoupling control on the basis of a high-speed motor speed-current-voltage three-closed-loop control system, and secondly, in order to avoid the decoupling algorithm from failing in a high-speed working condition and causing system instability, active damping based on stator current feedback is proposed to increase the system phase margin and suppress resonance peaks. The application solves the system instability problem caused by decoupling failure of the motor in a high-speed working condition, and realizes high-speed motor full-speed-domain decoupling control.

Description

TECHNICAL FIELD

[0001] The present application relates to motor control technology, in particular to a kind of high-speed motor current source inverter decoupling control method and system. BACKGROUND

[0002] In AC transmission system is usually driven by traditional frequency converter, and the performance of traditional frequency converter is limited, it is difficult to meet the motor drive of higher performance occasion, especially in high-speed motor drive system, therefore using current source inverter can well inhibit the problem of large output current ripple, reduce torque ripple, thereby reducing motor rotor loss and motor heating.But in the current source inverter high-speed motor drive system, there are the following problems: on the one hand, the control object of system changes from first-order to second-order, there is resonance problem, regulator parameter is difficult to design, increase the control difficulty of motor;On the other hand, in the vector control system, coordinate transformation can also make the coupling between capacitor and direct axis, especially when motor works at high speed, coupling will further intensify, using complex vector decoupling can solve the coupling problem of high-speed motor at low speed working condition, but at high speed working condition, decoupling failure system instability phenomenon appears. SUMMARY

[0003] The present application provides a kind of high-speed motor current source inverter decoupling control method and system with simpler design and higher stability, to solve the problems in the prior art.

[0004] Technical scheme: the high-speed motor current source inverter decoupling control method provided by the application comprises:

[0005] (1) the position signal of motor rotor is sampled, the position information of current position and real-time speed are obtained after processing, and the difference between real-time speed and given speed is input into speed regulator, to obtain the cross-axis current reference value of motor;

[0006] (2) the three-phase current and voltage of motor stator are sampled, and the sampling signal is subjected to coordinate transformation according to current position information, to obtain the cross-axis current feedback and the cross-axis voltage feedback of motor;

[0007] (3) the difference between the cross-axis current feedback of motor and the cross-axis current reference value is input into current regulator, to obtain the cross-axis voltage reference value, and the difference between the direct-axis current feedback of motor and zero reference current is input into current regulator, to obtain the direct-axis voltage reference value.

[0008] (4) the cross-axis current feedback and the direct-axis current feedback of motor are multiplied by preset damping coefficient respectively, and the cross-axis voltage reference value and the direct-axis voltage reference value are subjected to negative feedback correction respectively, to obtain the active damping correction cross-axis reference voltage and the active damping correction direct-axis reference voltage based on stator current feedback;

[0009] (5) inputting the difference between the quadrature axis voltage feedback and the active damping modified quadrature axis reference voltage into the voltage regulator to obtain the filter capacitor quadrature axis current reference value, and inputting the difference between the direct axis voltage feedback and the active damping modified direct axis reference voltage into the voltage regulator to obtain the filter capacitor direct axis current reference value;

[0010] (6) adding the filter capacitor quadrature axis current reference value and the filter capacitor direct axis current reference value to the motor quadrature axis current feedback and the motor direct axis current feedback respectively to obtain the inverter quadrature axis current reference value and the inverter direct axis current reference value, and performing Park inverse transformation to obtain the amplitude and phase of the current required by the inverter;

[0011] (7) obtaining the switching signal by combining the space vector pulse width modulation technology according to the amplitude and phase of the current required by the inverter and the current position information, so as to drive the amplitude and phase of the inverter current;

[0012] (8) repeating steps (1) to (7) to realize real-time inverter current amplitude and phase adjustment tracking.

[0013] Further, the position signal sampling is realized by a position sensor or a position estimation algorithm.

[0014] Further, step (4) specifically comprises:

[0015] (4-1) multiplying the motor quadrature axis current feedback by a preset damping coefficient, and subtracting the quadrature axis voltage reference value to obtain the active damping modified quadrature axis reference voltage based on the stator current feedback;

[0016] (4-2) multiplying the motor direct axis current feedback by a preset damping coefficient, and subtracting the direct axis voltage reference value to obtain the active damping modified direct axis reference voltage based on the stator current feedback.

[0017] Further, the current regulator is one of proportional integral regulators with complex vector integral adjustment, and the transfer function is:

[0018] k p +k i / s+jk a / s

[0019] In the formula, k p is a proportional gain coefficient, k i is an integral gain coefficient, and k aWherein, the current regulator is configured to: output a first proportional integral regulation value by performing proportional integral regulation on a difference between the quadrature-axis current reference value and the quadrature-axis current feedback value; multiply the direct-axis current reference value and the direct-axis current feedback value by the complex vector decoupling coefficient, and then perform integral regulation to output a complex vector decoupling term of the direct axis; add the first proportional integral regulation value and the complex vector decoupling term of the direct axis to obtain the quadrature-axis voltage reference value; output a second proportional integral regulation value by performing proportional integral regulation on a difference between the quadrature-axis current reference value and the quadrature-axis current feedback value; multiply the direct-axis current reference value and the direct-axis current feedback value by the complex vector decoupling coefficient, and then perform integral regulation to output a complex vector decoupling term of the direct axis; and add the second proportional integral regulation value and the complex vector decoupling term of the direct axis to obtain the direct-axis voltage reference value.

[0020] Further, the position information is specifically angle information of the position.

[0021] The high-speed motor current source inverter decoupling control system comprises:

[0022] A position acquisition module is configured to sample and process a position signal of a motor rotor to obtain position information of a current position and a real-time rotating speed.

[0023] A rotating speed regulator is configured to regulate a difference between the real-time rotating speed and a given rotating speed to obtain a quadrature-axis current reference value of the motor.

[0024] A current sensor is configured to sample three-phase currents of a motor stator.

[0025] A voltage sensor is configured to sample three-phase voltages of the motor stator.

[0026] A coordinate transformation matrix is configured to perform coordinate transformation on the current sensor sampling signal according to the current position information to obtain a quadrature-axis current feedback value and a direct-axis current feedback value of the motor, and perform coordinate transformation on the voltage sensor sampling signal according to the current position information to obtain a quadrature-axis voltage feedback value and a direct-axis voltage feedback value of the motor.

[0027] A current regulator is configured to regulate a difference between the quadrature-axis current feedback value and the quadrature-axis current reference value to obtain the quadrature-axis voltage reference value, and regulate a difference between the direct-axis current feedback value and a zero reference current to obtain the direct-axis voltage reference value.

[0028] A damping correction module is configured to multiply the quadrature-axis current feedback value and the direct-axis current feedback value by preset damping coefficients respectively, and perform negative feedback correction on the quadrature-axis voltage reference value and the direct-axis voltage reference value respectively to obtain active damping correction quadrature-axis reference voltage and direct-axis reference voltage based on the stator current feedback.

[0029] The voltage regulator is used for adjusting the filter capacitor cross-axis current reference value according to the difference between the cross-axis voltage feedback value and the active damping correction cross-axis reference voltage, and adjusting the filter capacitor direct-axis current reference value according to the difference between the direct-axis voltage feedback value and the active damping correction direct-axis reference voltage.

[0030] The current generation module is used for adding the filter capacitor cross-axis and direct-axis current reference values to the motor cross-axis and direct-axis current feedback values respectively to obtain the inverter cross-axis and direct-axis current reference values, and performing Park inverse transformation to obtain the amplitude and phase of the current required by the inverter.

[0031] The space vector pulse width modulation module is used for obtaining the switching signal by combining the space vector pulse width modulation technology according to the amplitude and phase of the current required by the inverter and the current position information, so as to drive the amplitude and phase of the inverter current.

[0032] Further, the position sampling module is specifically a position sensor or a module realized by using a position estimation algorithm.

[0033] Further, the damping correction module specifically comprises:

[0034] The damping multiplication unit is used for multiplying the motor cross-axis current feedback value by a preset damping coefficient to obtain the cross-axis feedback voltage, and multiplying the motor direct-axis current feedback value by the preset damping coefficient to obtain the direct-axis feedback voltage.

[0035] The adder is used for subtracting the cross-axis feedback voltage from the cross-axis voltage reference value to obtain the active damping correction cross-axis reference voltage based on the stator current feedback, and subtracting the direct-axis feedback voltage from the direct-axis voltage reference value to obtain the active damping correction direct-axis reference voltage based on the stator current feedback.

[0036] Further, the current regulator is specifically one of proportional integral regulators with complex vector integral regulation, and the transfer function is:

[0037] k p +k i / s+jk a / s

[0038] In the formula, k p is a proportional gain coefficient, k i is an integral gain coefficient, and k aLet be the complex vector decoupling coefficient and j be the complex vector unit. The current regulator outputs a first proportional-integral (PI) regulation value after proportional-integral (PI) adjustment of the difference between the quadrature-axis current reference value and the quadrature-axis current feedback value. It then multiplies the difference between the direct-axis current reference value and the direct-axis current feedback value by the complex vector decoupling coefficient and outputs the quadrature-axis complex vector decoupling term after integral adjustment. Finally, it adds the first PI regulation value and the quadrature-axis complex vector decoupling term to obtain the quadrature-axis voltage reference value. Similarly, it outputs a second PI regulation value after proportional-integral (PI) adjustment of the difference between the direct-axis current reference value and the direct-axis current feedback value. The second PI regulation value and the direct-axis complex vector decoupling term are then added to obtain the direct-axis voltage reference value.

[0039] Furthermore, the location information specifically refers to the angle information of the location.

[0040] Beneficial effects: Compared with the prior art, the significant advantage of this invention is that it can solve the problems of failure of complex vector decoupling and system instability under high-speed conditions by using active damping feedback based on stator current feedback, and increases the robustness of the control algorithm in the full speed domain. Compared with active damping based on capacitor voltage feedback, it is more in line with the motor voltage and current equation for parameter design, and reduces the response time of the current regulator to step signals. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating the decoupling control method for a high-speed motor current source inverter provided by the present invention. Detailed Implementation

[0042] This embodiment provides a decoupling control method for a high-speed motor current source inverter, such as... Figure 1 As shown, it includes the following steps:

[0043] (1) The position signal of the motor rotor is sampled and differentiated to obtain the current position information and real-time speed ω. e and the real-time rotational speed ω e and a given rotational speed ω e * The difference is input to the speed regulator to obtain the reference value i of the motor's quadrature-axis current. sq * .

[0044] The sampling of the position signal is achieved through a position sensor or a position estimation method, and the position information is specifically the position angle θ. e The speed regulator is one of various linear or nonlinear regulators. The motor is connected via a DC voltage source V. s The DC filter inductor L passes through the circuit in sequence.dc Six power switches and diodes of three-phase bridge arm, and three AC filter capacitors are connected with the motor.

[0045] (2) Sampling three-phase current i abc of the motor stator, and performing Clark & Park coordinate transformation on the sampling signal according to the current position information to obtain the motor cross-axis current feedback i sq and the direct-axis current feedback i sd , both of which are expressed as i sdq . abc Sampling three-phase voltage u abc of the motor stator, and performing Clark & Park coordinate transformation on the sampling signal according to the current position information to obtain the motor cross-axis voltage feedback u sq and the direct-axis voltage feedback u sd , both of which are expressed as u sdq .

[0046] (3) Inputting the difference between the motor cross-axis current feedback i sq and the cross-axis current reference value i sq * into the current regulator to obtain the cross-axis voltage reference value u sq.x * Inputting the difference between the motor direct-axis current feedback i sd and the zero reference current i sd * =0 into the current regulator to obtain the direct-axis voltage reference value u sd,x * .

[0047] Among them, the current regulator is one of proportional integral regulators with complex vector integral regulation, and the transfer function is:

[0048] k p +k i / s+jk a / s

[0049] In the formula, k p is a proportional gain coefficient, k i is an integral gain coefficient, and k aLet be the complex vector decoupling coefficient and j be the complex vector unit. The current regulator outputs a first proportional-integral (PI) regulation value after proportional-integral (PI) adjustment of the difference between the quadrature-axis current reference value and the quadrature-axis current feedback value. It then multiplies the difference between the direct-axis current reference value and the direct-axis current feedback value by the complex vector decoupling coefficient and outputs the quadrature-axis complex vector decoupling term after integral adjustment. Finally, it adds the first PI regulation value and the quadrature-axis complex vector decoupling term to obtain the quadrature-axis voltage reference value. Similarly, it outputs a second PI regulation value after proportional-integral (PI) adjustment of the difference between the direct-axis current reference value and the direct-axis current feedback value. The second PI regulation value and the direct-axis complex vector decoupling term are then added to obtain the direct-axis voltage reference value.

[0050] (4) Multiply the AC and DC axis current feedback values ​​of the motor by the preset damping coefficients respectively, and perform negative feedback correction on the AC and DC axis voltage reference values ​​respectively to obtain the active damping correction AC and DC axis reference voltages based on stator current feedback.

[0051] This step specifically includes:

[0052] (4-1) Feedback amount i of the motor's quadrature axis current sq Multiplied by the preset damping coefficient R p and the quadrature axis voltage reference value u sq.x * Subtraction yields the active damped modified quadrature-axis reference voltage u based on stator current feedback. sq * ;

[0053] (4-2) Feedback the direct-axis current i of the motor sd Multiplied by the preset damping coefficient R p and the direct-axis voltage reference value u sd.x * Subtraction yields the active damped corrected direct-axis reference voltage u based on stator current feedback. sd * .

[0054] The active damping modified AC and DC axis reference voltage based on stator current feedback can be expressed as u sdq * .

[0055] (5) Feedback quantity u of quadrature axis voltage sq With active damped modified quadrature-axis reference voltage u sq * The differential input voltage regulator obtains the reference value i of the cross-axis current of the filter capacitor. cq * The direct-axis voltage feedback quantity u sd With active damping corrected direct-axis reference voltage usd * The difference between the input voltage regulator, get filter capacitor direct axis current reference value i cd * .

[0056] Wherein, the voltage regulator is one of various linear regulator or nonlinear regulator.

[0057] (6) the filter capacitor, the direct axis current reference value is added to the motor's direct axis current feedback value, and the Park inverse transformation is obtained to get the amplitude and phase of the modulation inverter required current.

[0058] The step specifically includes:

[0059] (6-1) the filter capacitor, the direct axis current reference value is added to the motor's direct axis current feedback value, and the Park inverse transformation is obtained to get the amplitude and phase of the modulation inverter required current. cq * sq wq * ;

[0060] (6-2) the filter capacitor, the direct axis current reference value is added to the motor's direct axis current feedback value, and the Park inverse transformation is obtained to get the amplitude and phase of the modulation inverter required current. cd * sd wd * ; i wq * And i wd * Can be expressed as i wdq * ;

[0061] (6-3) the filter capacitor, the direct axis current reference value is added to the motor's direct axis current feedback value, and the Park inverse transformation is obtained to get the amplitude and phase of the modulation inverter required current. wq * wd * ;

[0062] (7) according to the amplitude and phase of the modulation inverter required current and the current position information, combined with space vector pulse width modulation technology, get switch signal, so as to drive the regulation inverter current amplitude phase.

[0063] (8) repeat step (1) to step (7), realize real-time inverter current amplitude, phase regulation tracking.

[0064] The embodiment also provides a high-speed motor current source inverter decoupling control system, comprising:

[0065] ​​​​​A position acquisition module is configured to sample and process a position signal of a motor rotor to obtain position information of a current position and a real-time rotating speed;

[0066] A rotating speed regulator is configured to regulate a difference between the real-time rotating speed and a given rotating speed to obtain a cross-axis current reference value of the motor;

[0067] A current sensor is configured to sample three-phase currents of a motor stator;

[0068] A voltage sensor is configured to sample three-phase voltages of the motor stator;

[0069] A coordinate transformation matrix is configured to perform coordinate transformation on the sampling signals of the current sensor according to the current position information to obtain a cross-axis current feedback value and a direct-axis current feedback value of the motor, and perform coordinate transformation on the sampling signals of the voltage sensor according to the current position information to obtain a cross-axis voltage feedback value and a direct-axis voltage feedback value of the motor;

[0070] A current regulator is configured to regulate a difference between the cross-axis current feedback value and the cross-axis current reference value to obtain a cross-axis voltage reference value, and regulate a difference between the direct-axis current feedback value and a zero reference current to obtain a direct-axis voltage reference value.

[0071] A damping correction module is configured to multiply the cross-axis and direct-axis current feedback values of the motor by preset damping coefficients respectively, and perform negative feedback correction on the cross-axis and direct-axis voltage reference values respectively to obtain active damping correction cross-axis and direct-axis reference voltages based on stator current feedback;

[0072] A voltage regulator is configured to regulate a difference between the cross-axis voltage feedback value and the active damping correction cross-axis reference voltage to obtain a filter capacitor cross-axis current reference value, and regulate a difference between the direct-axis voltage feedback value and the active damping correction direct-axis reference voltage to obtain a filter capacitor direct-axis current reference value;

[0073] A current generation module is configured to add the filter capacitor cross-axis and direct-axis current reference values to the cross-axis and direct-axis current feedback values of the motor respectively to obtain cross-axis and direct-axis current reference values of an inverter, and perform inverse Park transformation to obtain an amplitude and a phase of a current required by the inverter;

[0074] A space vector pulse width modulation module is configured to obtain a switching signal by combining a space vector pulse width modulation technology and the amplitude and the phase of the current required by the inverter and the current position information, so as to drive the inverter to adjust the amplitude and the phase of the current.

[0075] The damping correction module specifically comprises:

[0076] The damping multiplication unit is configured to multiply the motor cross-axis current feedback by a preset damping coefficient to obtain a cross-axis feedback voltage, and multiply the motor direct-axis current feedback by the preset damping coefficient to obtain a direct-axis feedback voltage.

[0077] The adder is configured to subtract the cross-axis voltage reference value from the cross-axis feedback voltage to obtain a stator current feedback-based active damping corrected cross-axis reference voltage, and subtract the direct-axis voltage reference value from the direct-axis feedback voltage to obtain a stator current feedback-based active damping corrected direct-axis reference voltage.

[0078] The current generation module specifically comprises:

[0079] The adder is configured to add the filtered capacitor cross-axis current reference value to the motor cross-axis current feedback to obtain the inverter cross-axis current reference value, and add the filtered capacitor direct-axis current reference value to the motor direct-axis current feedback to obtain the inverter direct-axis current reference value.

[0080] The Park inverse transformer is configured to perform Park inverse transformation on the inverter cross-axis current reference value and the inverter direct-axis current reference value to obtain the amplitude and phase of the current required for modulating the inverter.

[0081] The system of the embodiment corresponds to the method described above, and details are described in the method and will not be described here.

[0082] The application realizes current loop complex vector decoupling and voltage loop feedforward decoupling control on the basis of a high-speed motor speed-current-voltage three-closed-loop control system, realizes hierarchical decoupling of a second-order system, and increases the dynamic response of the high-speed motor driving system. By introducing a stator current feedback loop to change the transfer function from the given current to the feedback current, a zero point is introduced in the system to suppress resonance peaks and increase the phase margin. The motor object controlled by the current regulator changes due to the introduction of Rp, and the adjusted regulator parameters also change accordingly. Compared with active damping based on capacitor voltage feedback, the parameters are designed to be more consistent with the motor voltage and current equation, the response time of the current loop to the step signal is shorter, and the complex vector integral oscillation is smaller, which is beneficial to system stability. The response time of the current regulator to the step signal is reduced. Moreover, the use of passive elements can be reduced through the active damping feedback strategy, thereby reducing the cost of the driving system. The application not only solves the system instability problem caused by decoupling failure of the motor under high-speed working conditions and realizes high-speed motor full-speed-domain decoupling control, but also enables the system to have stronger robustness and dynamic response.

[0083] The above only discloses one preferred embodiment of the application, and cannot limit the scope of the application. Therefore, equivalent changes made according to the claims of the application are still within the scope of the application.

Claims

1. A method of decoupled control of a high speed motor current source inverter, characterized by The method comprises: (1) sampling the position signal of the motor rotor, obtaining the position information of the current position and the real-time speed through processing, and inputting the difference between the real-time speed and the given speed into the speed regulator to obtain the motor cross-axis current reference value; (2) sampling the three-phase current and voltage of the motor stator, and performing coordinate transformation on the sampling signal according to the current position information to obtain the motor cross-axis and direct-axis current feedback and the motor cross-axis and direct-axis voltage feedback; (3) inputting the difference between the motor cross-axis current feedback and the cross-axis current reference value and the difference between the direct-axis current feedback and the zero reference current into the current regulator to obtain the cross-axis voltage reference value and the direct-axis voltage reference value; (4) multiplying the motor cross-axis and direct-axis current feedback by a preset damping coefficient, respectively, and performing negative feedback correction on the cross-axis and direct-axis voltage reference values, respectively, to obtain the active damping correction cross-axis and direct-axis reference voltage based on the stator current feedback; (5) inputting the difference between the cross-axis voltage feedback and the active damping correction cross-axis reference voltage into the voltage regulator to obtain the filter capacitor cross-axis current reference value, and inputting the difference between the direct-axis voltage feedback and the active damping correction direct-axis reference voltage into the voltage regulator to obtain the filter capacitor direct-axis current reference value; (6) adding the filter capacitor cross-axis and direct-axis current reference values to the motor cross-axis and direct-axis current feedbacks, respectively, to obtain the inverter cross-axis and direct-axis current reference values, and performing Park inverse transformation to obtain the amplitude and phase of the current required by the modulation inverter; (7) according to the amplitude and phase of the current required by the modulation inverter and the current position information, combining the space vector pulse width modulation technology, obtaining the switching signal to drive the modulation inverter current amplitude and phase; (8) repeating steps (1) to (7) to realize real-time inverter current amplitude and phase adjustment tracking.

2. The decoupled control method for high speed motor current source inverter as claimed in claim 1 wherein: The sampling of the position signal is realized by a position sensor or a position estimation algorithm.

3. The decoupled control method for high speed motor current source inverter as claimed in claim 1 wherein: Step (4) specifically comprises: (4-1) multiplying the motor cross-axis current feedback by a preset damping coefficient, and subtracting the cross-axis voltage reference value to obtain the active damping correction cross-axis reference voltage based on the stator current feedback; (4-2) multiplying the motor direct-axis current feedback by a preset damping coefficient, and subtracting the direct-axis voltage reference value to obtain the active damping correction direct-axis reference voltage based on the stator current feedback.

4. The method of claim 1, wherein: The current regulator is one of the proportional integral regulators with complex vector integral regulation, and the transfer function is: k p +k i / s+jk a / s where k p is a proportional gain coefficient, k i is an integral gain coefficient, k a is a complex vector decoupling coefficient, and j is a complex vector unit. The current regulator outputs a first proportional integral regulation value after proportional integral regulation of a difference between the quadrature-axis current reference value and the quadrature-axis current feedback value, multiplies a difference between the direct-axis current reference value and the direct-axis current feedback value by a complex vector decoupling coefficient, and then outputs a complex vector decoupling term of the quadrature axis after integral regulation, adds the first proportional integral regulation value and the complex vector decoupling term of the quadrature axis to obtain the quadrature-axis voltage reference value, and outputs a second proportional integral regulation value after proportional integral regulation of a difference between the direct-axis current reference value and the direct-axis current feedback value, multiplies a difference between the quadrature-axis current reference value and the quadrature-axis current feedback value by the complex vector decoupling coefficient, and then outputs a complex vector decoupling term of the direct axis after integral regulation, and adds the second proportional integral regulation value and the complex vector decoupling term of the direct axis to obtain the direct-axis voltage reference value.

5. The method of claim 1, wherein: The position information is specifically angle information of the position.

6. A high speed motor current source inverter decoupled control system, characterized by The system comprises: a position acquisition module configured to sample and process a position signal of a rotor of the motor to obtain position information of a current position and a real-time rotating speed; a rotating speed regulator configured to regulate a difference between the real-time rotating speed and a given rotating speed to obtain a quadrature-axis current reference value of the motor; a current sensor configured to sample three-phase currents of a stator of the motor; a voltage sensor configured to sample three-phase voltages of the stator of the motor; a coordinate transformation matrix configured to perform coordinate transformation on a sampling signal of the current sensor according to the position information of the current position to obtain a quadrature-axis current feedback value and a direct-axis current feedback value of the motor, and perform coordinate transformation on a sampling signal of the voltage sensor according to the position information of the current position to obtain a quadrature-axis voltage feedback value and a direct-axis voltage feedback value of the motor; a current regulator configured to regulate a difference between the quadrature-axis current feedback value and the quadrature-axis current reference value to obtain a quadrature-axis voltage reference value, and regulate a difference between the direct-axis current feedback value and a zero reference current to obtain a direct-axis voltage reference value; a damping correction module configured to multiply the quadrature-axis current feedback value and the direct-axis current feedback value by preset damping coefficients respectively, and perform negative feedback correction on the quadrature-axis voltage reference value and the direct-axis voltage reference value respectively to obtain active damping correction quadrature-axis reference voltage and active damping correction direct-axis reference voltage based on stator current feedback; a voltage regulator configured to regulate a difference between the quadrature-axis voltage feedback value and the active damping correction quadrature-axis reference voltage to obtain a filter capacitor quadrature-axis current reference value, and regulate a difference between the direct-axis voltage feedback value and the active damping correction direct-axis reference voltage to obtain a filter capacitor direct-axis current reference value; a current generation module configured to add the filter capacitor quadrature-axis current reference value and the filter capacitor direct-axis current reference value to the quadrature-axis current feedback value and the direct-axis current feedback value respectively to obtain quadrature-axis current reference values and direct-axis current reference values of an inverter, and perform Park inverse transformation to obtain amplitudes and phases of currents required by the inverter; a space vector pulse width modulation module configured to obtain switching signals by combining a space vector pulse width modulation technology according to the amplitudes and phases of the currents required by the inverter and the position information of the current position, so as to drive the amplitudes and phases of the currents of the inverter.

7. The high speed motor current source inverter decoupling control system of claim 6, wherein: The position acquisition module is specifically a position sensor or a module realized by a position estimation algorithm.

8. The high speed motor current source inverter decoupling control system of claim 6, wherein: The damping correction module specifically comprises: The damping multiplication unit is configured to multiply a cross-axis current feedback of the motor by a preset damping coefficient to obtain a cross-axis feedback voltage, and multiply a direct-axis current feedback of the motor by the preset damping coefficient to obtain a direct-axis feedback voltage; The adder is configured to subtract the cross-axis feedback voltage from a cross-axis voltage reference to obtain an active damping correction cross-axis reference voltage based on stator current feedback, and subtract the direct-axis feedback voltage from a direct-axis voltage reference to obtain an active damping correction direct-axis reference voltage based on the stator current feedback.

9. The high speed motor current source inverter decoupling control system of claim 6, wherein: The current regulator is specifically one of proportional integral regulators with complex vector integral regulation, and a transfer function is: k p +k i / s+jk a / s where k p is a proportional gain coefficient, k i is an integral gain coefficient, k a is a complex vector decoupling coefficient, and j is a complex vector unit. The current regulator outputs a first proportional integral regulation value after proportional integral regulation of a difference between a cross-axis current reference and a cross-axis current feedback, multiplies a difference between a direct-axis current reference and a direct-axis current feedback by a complex vector decoupling coefficient, and then outputs a complex vector decoupling term of the cross-axis after integral regulation, adds the first proportional integral regulation value and the complex vector decoupling term of the cross-axis to obtain the cross-axis voltage reference, and outputs a second proportional integral regulation value after proportional integral regulation of the difference between the cross-axis current reference and the cross-axis current feedback, multiplies the difference between the direct-axis current reference and the direct-axis current feedback by the complex vector decoupling coefficient, and then outputs a complex vector decoupling term of the direct-axis after integral regulation, and adds the second proportional integral regulation value and the complex vector decoupling term of the direct-axis to obtain the direct-axis voltage reference.

10. The high speed motor current source inverter decoupling control system of claim 6, wherein: The position information is specifically angle information of the position.

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