Is it better to use a motor with twice the torque and half the speed of half the torque and twice the speed?

Is it better to use a motor with twice the torque and half the speed of half the torque and twice the speed?

Torque is measured in pound feet (lb-ft). According to the equation, torque must double if HP is to remain constant when speed is reduced by one half. Motors must do twice as much work per rotation to produce the same HP at the lower speed, this requires twice as much torque.

Does the speed of the motor change with the increasing load?

Load Torque: For a fixed voltage, the speed of the motor is inversely affected by the load. Increase in load torque = decrease in speed.

When the load on a motor increases what happens to the speed of the motor?

Two things will definitely happen when a motor’s load is increased: motor speed will decrease (how much is dictated by the horsepower and torque of the motor and the increase of the load), almost immediately, the motor will try to speed back up, drawing more current than before.

What happens to speed when load increases?

Force is mass*acceleration; the mass of the piston is constant, it means there is an increase in the acceleration of the piston and hence the speed. So with nodoubt, it can be said that ‘The speed of the engine increases due increase in the load (air+fuel) on the engine”.

Which is more important HP or torque?

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

What happens when you run a DC motor twice?

Keep in mind, operating the motor at twice the speed at the same load/torque point will cause the motor to work harder, creating additional heat that could cause premature motor failure over time. As with three phase AC and Brushless DC motors, controls can be used with DC motors.

What causes a motor to speed up or slow down?

The motor either speeds up or slows down according to the load torque. It is ideal to size a motor properly so you can operate closer to maximum efficiency (rated torque and rated speed). Look at the speed-torque curve below for an AC induction motor.

How to calculate the synchronous speed of a motor?

Mathematically, here’s the formula that determines the “synchronous speed” of the motor. Oriental Motor manufactures both 2 and 4 pole AC motors. For a 3-phase AC motor with an input voltage of 220VAC, 60 Hz, the motor’s synchronous speed (RPM) = 120 x 60 / 4 = 1800 RPM. Synchronous speed is essentially no load speed with the slip.

Why does applying a rated load slow down a motor?

Since applying a rated load would slow down the motor to its rated speed, the difference between rated speed and synchronous speed is the existence of the rated load.