A permanent magnet synchronous anti-instability field weakening method

A permanent magnet synchronous, loss-proof technology, applied in the direction of motor generator control, control of electromechanical transmission, control of electromechanical brakes, etc., can solve the problem that permanent magnet synchronous motor cannot be fully utilized, and achieve fast and stable dynamic response and small torque loss. Effect

Active Publication Date: 2022-07-29
ZHEJIANG LEAPMOTOR TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to overcome the problem that the characteristics of the permanent magnet synchronous motor cannot be fully utilized in the prior art, and provides a permanent magnet synchronous anti-instability magnetic field weakening method that can fully utilize the characteristics of the permanent magnet synchronous motor

Method used

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  • A permanent magnet synchronous anti-instability field weakening method
  • A permanent magnet synchronous anti-instability field weakening method
  • A permanent magnet synchronous anti-instability field weakening method

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Embodiment

[0042] Embodiment: a permanent magnet synchronous anti-instability field weakening method, such as figure 1 As shown, the method includes the following steps:

[0043]S1: Set the voltage utilization rate Kr, design the voltage loop, and calculate the table lookup coefficient k; the specific steps are:

[0044] Set the voltage utilization rate Kr, design the voltage loop, and calculate the look-up table modulation coefficient k, such as figure 2 As shown, the calculation formula is as follows:

[0045] Perform PI adjustment on K1 to obtain a look-up table modulation coefficient k;

[0046] In the formula: U d* , U q* are the outputs of the current regulators of the D-axis and Q-axis, respectively, kr represents the voltage utilization rate; U dc It represents the bus voltage, Spd represents the motor speed, and Tor represents the motor torque command.

[0047] S2: According to the motor speed spd, bus voltage U dc , the rated voltage Uk and the look-up table modulatio...

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Abstract

The invention discloses a permanent magnet synchronous anti-instability field-weakening method. The method includes the following steps: S1: setting U according to a demanded voltage utilization rate dc , design the voltage loop, calculate the look-up table coefficient k; S2: calculate the final actual look-up table speed according to the motor speed, bus voltage, rated voltage Uk and look-up table modulation coefficient k; S3: calibrate the field weakening current point and store, according to Modulation coefficient k, bus voltage U dc , the motor speed Spd and the torque request Tor are calculated (i d , i q ); S4: The voltage feedforward unit calculates the real-time flux linkage ψ according to the reference current id and iq calculated above, combined with the pre-calibrated flux linkage parameter table d and ψ q , and then sent to the feed-forward voltage calculation unit to calculate the feed-forward voltage compensation quantities UdC and UqC; S5: The current regulator adopts a PI controller, and the compensated current is the reference input, which is adjusted by the current regulator to output the reference voltage. The invention provides a permanent magnet synchronous anti-instability field weakening method which can fully utilize the characteristics of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to the technical field of permanent magnet anti-instability, in particular to a permanent magnet synchronous anti-instability field-weakening method. Background technique [0002] At present, with the development of the national economy and science and technology, the role of motors in all walks of life is becoming more and more important. Thanks to its many advantages in design, manufacture and control, permanent magnet synchronous motors are widely used in various industrial production and life occasions. In addition, my country is rich in rare earth resources, and the application market of permanent magnet synchronous motors is particularly large in my country. Permanent magnet synchronous motor can be divided into surface mount type and built-in type according to the similarities and differences of the inductance of the AC and the direct axis. Because the built-in permanent magnet synchronous motor (IPMSM) can have a wide spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/22H02P25/022
CPCH02P21/0003H02P21/0089H02P21/14H02P21/22H02P25/022H02P2207/05
Inventor 刘灿𠚵非凡
Owner ZHEJIANG LEAPMOTOR TECH CO LTD
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