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Arbitrary level real-time sector subdivision direct torque control method

A direct torque control and sector technology, applied in the control system, control generator, vector control system, etc., can solve the problem of no further discussion of the synthetic vector law, etc., to reduce torque ripple, reduce torque ripple, The effect of good dynamic and static characteristics

Inactive Publication Date: 2013-10-23
CETC NINGBO MARINE ELECTRONICS RES INST
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Problems solved by technology

However, in this type of literature, the number of synthetic vectors is set to 3, and the law of synthetic vectors is not further discussed.

Method used

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  • Arbitrary level real-time sector subdivision direct torque control method
  • Arbitrary level real-time sector subdivision direct torque control method
  • Arbitrary level real-time sector subdivision direct torque control method

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Embodiment Construction

[0036] The specific embodiments of the present invention will be introduced below in conjunction with the drawings:

[0037] Such as figure 1 As shown, the steps of a direct torque control method with any level of real-time sector subdivision type are as follows:

[0038] S1: Determine the total number of sectors x of the current motor control system, according to the formula Determine the sector relationship coefficient n.

[0039] Such as figure 2 As shown, step S1 includes, S11: confirm the current total number of sectors x of the current motor control system; S12: determine the relationship coefficient between the current total number of sectors and the 6-sector basic system, the formula is: , Where x is the total number of sectors of the current motor control system, by the formula The relationship coefficient n between the current motor control system and the basic 6 sectors can be calculated;

[0040] The basic sector of the direct torque control DTC is a 6-sec...

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Abstract

The invention discloses an arbitrary level real-time sector subdivision direct torque control method, which comprises the following steps that: S1: the total number x of sectors of the current motor control system is determined, and the sector correlation coefficient n is determined according to a formula; S2: according to the sector correlation coefficient n and the total number m of basic vectors, the m-layer sector layout is built; S3: the position of motor flux is judged, and the used vectors at the current position in the sector layout is locked at the position; S4, the instantaneous speed of a motor is detected for the synthesis of control vectors; S5: the lock-in positions of the control vectors are determined, so that a coordinate axis of a motor control system is built; S6: zero sectors are determined according to the instantaneous speed of the motor, and in accordance with the zero vectors, a real-time vector table is synthesized; and S7: appropriate vector values are selected from the vector table to be used for controlling the motor. In the method, according to the real-time situation, the optimal vector is synthesized to be used to reduce the torque ripple so as to achieve better static and dynamic characteristics.

Description

Technical field [0001] The invention relates to a sector control method, in particular to a sector subdivision type control method that integrates the characteristics of the direct torque control method and implements a vector table of any layer. Background technique [0002] Direct torque control (DTC) technology is another high dynamic performance speed control system developed after the vector control system. It abandons the decoupling idea in the vector control and directly starts with the stator flux and uses the temperature For the stator resistance that has less influence, calculate the stator flux and torque and directly control them. Because it uses the torque feedback system to directly control the electromagnetic torque of the motor, it gets its name. [0003] The discretized torque equation is obtained in Moment of torque [0004] (1.1) [0005] among them [0006] (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00
Inventor 刘贤兴王伟然孙宇新
Owner CETC NINGBO MARINE ELECTRONICS RES INST
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