Do electric motors have torque curves?
An ECU is programmed to meet the torque needs stated by the manufacturer, with many engines set up to form as flat a torque curve as possible for even distribution across the rev range. The massive drawback for this torque delivery is the lag in reaching maximum torque.
How do you calculate the torque of an electric motor?
How to calculate torque of motor:
- Torque is nothing but a momentary force developed at the time of force is applied to the motor. The unit of torque is N.m (Newton-meter).
- For Calculating, Torque for DC motor.
- T = V x I x pf / (2 x pi x N(rpm) / 60)
- I => Input AC Current in amps.
How do you get more torque from an electric motor?
Please suggest a circuit to accomplish it. To increase the torque (if 9V won’t get it high enough) you can increase the supply voltage, and to decrease the speed you can pulse width modulate (PWM) the supply input to the motor.
What is torque in an electric motor?
Torque: The torque output of a motor is the amount of rotational force that the motor develops. The torque of a small electric motor is commonly measured in either inch pounds (in-lbs), Newton meters (N-m) or other directly converted units of measure.
Do electric motors produce constant torque?
Since the motor torque is proportional to current, the motor torque is constant (at its maximum) for that portion of the acceleration event.
Do electric motors have more torque?
Electric vehicles generate much more torque than gas vehicles, which is important because torque is what drives the vehicle forward. Furthermore, an electric car’s motor eliminates the need for a traditional transmission in many modern designs.
How do I make my torque higher?
An effective modification that will increase torque significantly is to install a turbo or supercharger. Forced induction forces air into your engine, increasing the power the engine provides. Depending on the torque curve you prefer, a turbocharger will need time to spool before it provides torque benefits.
What makes a motor have high torque?
A high torque motor is toroid shaped, like a donut, and thus has a large diameter and short axis. These motors can directly drive the application without additional mechanics, like worm wheels, belts or pulleys.
Why do electric motors have high torque?
The benefit of using an electric motor to power a car is that it can help drivers reach maximum torque from 0 RPM. This is because electric motors use an electric current, which moves through a magnetic field and creates the force necessary to rotate the armature and get the car moving.
Why does torque decrease as RPM increase electric motor?
But at zero RPM, all of the electricity the motor creates from the time electric power is applied becomes instant torque—without any back EMF to reduce its output. The higher the revs, the more back EMF, meaning that instantaneous torque effect diminishes.
Is it better to have more torque than horsepower?
Torque multiplied by rpm returns horsepower. Basically, the faster the crankshaft spins with the same amount of force, the more power an engine will make. A car with more hp than torque will always be quicker since this gives a car acceleration and speed.
How much torque does a 30 hp electric motor have?
I Nm = 0.74 ft·lb. Example: A three-phase motor has rated power of 30HP & the rated speed of 1480rpm.
How do you calculate the torque of an HP motor?
- Torque (lb.in) = 63,025 x Power (HP) / Speed (RPM)
- Power (HP) = Torque (lb.in) x Speed (RPM) / 63,025.
- Torque (N.m) = 9.5488 x Power (kW) / Speed (RPM)
- Power (kW) = Torque (N.m) x Speed (RPM) / 9.5488.
How do you calculate the starting torque of a motor?
To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.
What is more important torque or HP?
Well, if you just want to go fast and hit 140 mph, then horsepower would be more effective for you. However, if you want a strong car that can pull boulders and take off quickly, a high torque might be more important to you. In short, torque makes your vehicle quick. Horsepower makes it fast.
What is the torque of a 100 hp motor?
The torque delivered from an electrical motor producing 100 hp at speed 1000 rpm can be calculated as T = (100 hp) 63025 / (1000 rpm) = 6303 (lbf in) To convert to pound-force foot – divide the torque by 12.
What is the relationship between HP and torque in electric motors?
The relationship between the HP and torque produced by an electric motor can be a bit perplexing. When that motor is controlled by a VFD, it can be confusing. In a linear environment, work is the product of the force applied to an object and the distance the object travels due to that force:
How do you get constant torque on a 230V motor?
A novel way to provide constant torque at higher-than-base speeds is to run a 230-volt motor on a 460-volt VFD. In these applications, the drive is programmed to provide full voltage at 120 hertz and then reduces voltage proportionally as speed is reduced.
What is a torque-speed curve for a pump?
A pump’s torque-speed curve is used to determine the appropriate motor to match with it. A pump’s torque-speed curve is produced by plotting the percentage of full load torque (FLT) vertically against the percentage of full load speed (FLS) plotted horizontally.