What is the maximum torque?

What is the maximum torque?

Torque is defined as τ = rF sin θ, where F is the force, r is the distance from the pivot that the force is applied, and θ is the angle between r and F. (b) The maximum torque occurs when θ is a right angle and sin θ = 1.

What is maximum torque per ampere?

Maximum torque per ampere control is also known as unit current output maximum torque control. The basic idea of MTPA control strategy is to find the current operating point that can output the maximum torque under the constant stator current amplitude [22, 23].

Which machine has maximum torque per ampere?

Salient-pole PMSM (permanent magnet synchronous motor) often used the MTPA (maximum torque per ampere) control strategy[1]-[4], i.e. the per unit current output of the maximum torque, while the relationship between the electromagnetic torque Tem and the AC-DC-axis currents id, iq are non-linear equations, solving these …

Can we increase speed of PMSM over rated speed?

It is possible to operate the PMSM with the speed that exceeds the rated rpm if the permanent-magnet excitation is weakened by a demagnetising field component produced by the stator winding.

How do you get maximum torque?

Note that the torque is maximum when the angle is 90 degrees. A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force.

Is the higher the torque the better?

Horsepower means your car can go faster, and torque means…? Torque, simply, is the ability of a vehicle to perform work — specifically, the twisting force applied by the crankshaft. Because there is generally a limit on how fast you can spin an engine, having higher torque allows for greater horsepower at lower rpms.

How does flux weakening work?

The flux weakening region is determined by the angle, θ, between the constant torque and voltage decreasing directions. If the angle is less than 90°, the operating point moves along the constant torque curve. If the angle is greater than 90°, it moves along the MTPV curve due to the voltage limitation.

What is mtpa control?

The MTPA Control Reference block computes the d-axis and q-axis reference current values for maximum torque per ampere (MTPA) and field-weakening operations. The block computes the reference current values by solving mathematical relationships.

How can I control my PMSM motor speed?

Speed regulation of the PMSM is performed through the designing of Proportional Integral (PI), Proportional integral derivative (PID), Sliding mode controller and Sliding mode controller plus PID controller as a speed regulator which is the part of the PMSM drive.

Can a PMSM operate at higher speeds than the nominal speed?

Yes, PMSM always operate at synchronous speed, that is at a multiple of electrical frequency determined by your rotor poles pair count. With PMSM, back EMF increases with speed which means you have to have enough voltage to drive the motor at that speed.

How do I calculate torque?

A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force. and the magnitude of the torque is τ = N m.

How to estimate the torque of a BLDC ( PMSM ) electric motor?

Operating a motor with ‘six step 120 degree’ commutation at low speed without a position sensor will result in less torque being produced than that predicted using the ‘conversion constant’ while high speed operation should be pretty close.

Which is the true maximum torque of a motor?

This thermally constrained torque output of a motor is also often referred to as a motors rated torque. The maximum speed at which a motor can operate forever at its rated torque is known as a motors base speed. It is possible to exceed a motors rated torque for short periods of time. The true maximum torque output of a motor is its peak torque.

What should be the no load speed of a motor?

As a rule of thumb, the rated current, and therefore torque output, of a hobbyist motor will be around one third that of the peak torque value, or around two thirds with aggressive forced air cooling. The no-load speed of a motor is voltage constrained. Useful work can only be done below a motors no-load speed.

What happens to the torque of a brushless motor?

When in normal use, the torque output of a hobbyist brushless motor increases roughly in line with the current supplied to its windings. Therefore, if you double the current to the motor you also double the torque output.