Senlan direct torque control principle

Create Date: 2024-8-30 12:03:23|Source: Hope Sunland

The direct torque control (DTC) function of the inverter is another high-performance communication frequency conversion speed regulation system developed after vector control. In the mid-80s of the 20th century, the German scholar Depenbrock proposed the theory of direct torque control in 1985, and his idea was to regard the motor and inverter as a whole, using the method of space voltage vector analysis to stop the magnetic flux and torque accounting in the stator coordinate system, and directly control the torque by tracking the switching state of the PWM inverter.

Senlan direct torque control principle

Therefore, this skill is different from vector manipulation, there is no need to decouple the stator current, avoid the complex accounting of vector transformation, the control structure is simple, and the lack of vector manipulation is dealt with to a large level, and it has been rapidly developed with novel manipulation thinking, precise and clear architecture, and excellent dynamic and static functions. This ability is now applied to the control of the inverter.

The direct torque manipulation skill is an analytical method that applies space vector and stator magnetic field orientation. It directly analyzes the mathematical model of the asynchronous motor in the stator coordinate system, calculates and controls the flux and torque of the asynchronous motor, and selects a discrete two-point scheduler (Bang-Bang control), compares the torque detection value with the given value of torque, and limits the torque to a certain range of response tendency, and the size of the promise tendency is controlled by the frequency scheduler, and generates a PWM signal to directly stop the control of the switching state of the inverter to obtain the torque output of high dynamic function.

Its handling effect does not depend on whether the mathematical model of the asynchronous motor can be simplified, but on the actual situation of torque. Therefore, there is no need to compare, equivalence, and convert between communication motors and DC motors, and there is no need to imitate the operation of DC motors. It is a high-static and dynamic communication speed control method, because it saves the coordinate conversion and accounting of the vector conversion mode, simplifies the mathematical model of the asynchronous motor, and decouples, so its control structure is simple, the torque of the system echoes quickly, and there is no overshoot.

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