What is direct torque control of induction motor?

What is direct torque control of induction motor?

Direct torque control (DTC) is an emerging technique for controlling PWM inverter-fed induction motor (IM) drives. It allows the precise and quick control of the IM flux and torque without calling for complex control algorithms. In principle, moreover, it requires only the knowledge of the stator resistance.

How does direct torque control work?

Direct Torque Control (DTC) is an optimised AC drives control principle where inverter switching directly controls the motor variables: flux and torque. The measured input values to the DTC control are motor current and voltage. The voltage is defined from the DC-bus voltage and inverter switch positions.

What is the difference between vector control and direct torque control?

DTC is “Direct Torque Control,” a method used by ABB in their high-performance drives. “Vector” control is a generic term, while “DTC” is specific in how the “vector control” is performed. Essentially, there are two components of current in the stator of an induction motor.

What is Direct torque technology?

High-performance AC drives from ABB offer an innovative technology called direct torque control (DTC). As the name suggests, the method controls motor flux and torque directly, instead of trying to control motor currents indirectly like AC vector drives and DC drives.

How is torque controlled in a motor?

To control DC motors torque, a DC drive will regulate armature current. The armature voltage is unregulated allowing the motor to operate at whatever speed is necessary to achieve the set current /torque level.

What is the difference between DTC and FOC?

FOC uses linear controllers and pulse width modulation (PWM) to control the fundamental components of the load voltage. On the other hand, DTC is a nonlinear strategy that directly generates the voltage vectors in the absence of a modulator. This paper presents a comparative study between the two control schemes.

What is vector control in induction motor?

Vector control, also called field-oriented control (FOC), is a variable-frequency drive (VFD) control method in which the stator currents of a three-phase AC or brushless DC electric motor are identified as two orthogonal components that can be visualized with a vector.

What is torque control and speed control?

A speed controller can control speed in. either a clockwise direction or a counterclockwise direction by applying a positive or. negative voltage. This is referred to as a two quadrant controller; clockwise torque in a. clockwise direction and counterclockwise torque in a counterclockwise direction.