What is meant by direct torque control?

What is meant by direct torque control?

Direct torque control (DTC) is one method used in variable-frequency drives to control the torque (and thus finally the speed) of three-phase AC electric motors. This involves calculating an estimate of the motor’s magnetic flux and torque based on the measured voltage and current of the motor.

What is field oriented control of induction?

The field oriented control (FOC) of induction motor provide one of the most suitable and popular speed control technique presently used. In the field oriented control, a d-q coordinates reference frame locked to the rotor flux vector is used to achieve decoupling between the motor flux and torque.

What is the difference between direct and indirect vector control?

In direct FOC the rotor angle or control vector is obtained by the terminal voltages & currents directly by using flux estimators. Similar to Indirect Vector Control, various controllers have been implemented on direct vector controlled induction motor drives also to improve the performance of the drive.

What is the importance of field oriented control of induction motor drive?

Advantages of Field Oriented Control Improved torque response. Torque control at low frequencies and low speed. Dynamic speed accuracy. Reduction in size of motor, cost and power consumption.

What is torque control on a drill?

All cordless drill drivers deliver torque, but only some have a feature called torque control, which if used correctly, prevents the drill driver from delivering too much torque at one time when driving screws. Torque control is also known as an adjustable clutch.

How do you control the torque of a motor?

Torque Control

1. Torque can be controlled directly by controlling the armature current. Fig.
2. In Fig. 10.8a, a phase-controlled rectifier, in combination with a dc-link filter inductor, can be used to create a variable dc-link current which can be applied directly to the armature terminals of the dc motor.
3. In Fig.

Which is better direct torque or indirect torque?

This has triggered large research and development investments in the automotive industry: hybrid electric vehicles (HEV) and pure EV with reduced gas emission. In addition to zero-emission, EV exhibits higher efficiency and much faster controlled torque, compared to the Internal Combustion Engine (ICE) cars.

What is the difference between Foc and DTC?

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.

How does torque control work in a car?

The Battery Pack supplies the energy to the motor via the DC/AC Converter (Power Electronics). The electric machine M/G produces the required torque to drive the vehicle. The Vehicle Control unit includes the Motor Control and the Power Management System, working simultaneously to ensure best performances with minimum power consumption [5], [6].