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 not further discussing the synthetic vector law, etc., to reduce torque ripple, improve dynamic and static characteristics, and reduce torque fluctuations. Effect of small torque ripple

Active Publication Date: 2012-01-11
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 embodiment of the present invention is introduced below in conjunction with accompanying drawing:

[0037] Such as figure 1 As shown, the steps of a real-time sector-subdivided direct torque control method at any level 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 relation coefficient n.

[0039] Such as figure 2 Shown, comprise in the step S1, S11: confirm the current sector total number x of current motor control system; S12: judge the relational coefficient of current sector total number and 6 sector basic systems, its 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 obtained;

[0040] The basic sector of direct torque control DTC is a 6-sector system. This method can car...

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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 control method which combines the characteristics of the direct torque control method and implements the generation of arbitrary layer vector tables. Background technique [0002] Direct torque control (DTC) technology is another high dynamic performance speed control system developed after the vector control system. Stator resistance, which has less influence, calculates stator flux linkage and torque, and directly controls them. It gets its name because it utilizes a torque feedback system to directly control the electromagnetic torque of the motor. [0003] The discretized torque equation is obtained in Momentary torque [0004] (1.1) [0005] in [0006] (1.2) [0007] (1.3) [0008] in . [0009] The first term...

Claims

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Application Information

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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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