What does negative engine torque mean?

Definition. Negative Torque is said to occur when conditions are such that air loading on a propeller causes it to drive the engine to which it is attached vice the normal condition in which the engine drives the propeller.

Why is torque negative in motor?

From reading your description, this appears to be a case where the motor is being decelerated very rapidly. If deceleration is very rapid and there is little friction or other means to slow load then the motor must apply muchtorque in the opposite direction (i.e. negative torque) to decelerate the load rapidly.

Can a motor have negative torque?

Following convention, we define positive rotation as being in the counter clockwise direction, therefore positive torque is counter-clockwise and negative torque is clockwise. If we are dealing with a motor, the electric machine produces torque that supports the motion.

What is the meaning of engine torque?

Torque is a twisting force that speaks to the engine’s rotational force and measures how much of that twisting force is available when an engine exerts itself. This applies torque, or a twisting force, to the bolt. While horsepower is simply measured in horsepower, torque is typically measured in pounds feet (lb.

Why does torque decrease with engine speed?

Torque starts to decrease because the engine cannot breathe as well. Due to the speed, the cylinder does not fill with air as well. A designer can get around this problem with “tuned intake” which sets up a resonance to pack the cylinder with air, but it only happens at a certain RPM.

Why is torque negative when speed is positive?

In the first quadrant the load torque acts in the opposite direction to that of rotation. To avoid this, the motor torque must act in the opposite direction of rotation or motor torque must be negative. The power will be negative though the speed is positive, so this quadrant is known as ‘forward braking quadrant’.

Does torque oppose rotation?

Torque is the rotational equivalence of force. So, a net torque will cause an object to rotate with an angular acceleration. Because all rotational motions have an axis of rotation, a torque must be defined about a rotational axis. A torque is a force applied to a point on an object about the axis of rotation.