# How is torque of BLDC motor calculated?

Contents

## How is torque calculated in BLDC motors?

Brushless motor calculation

1. Imax= sqrt(V Io/Rm) Torque at max efficiency: …
2. Ip= (V + Rm Io)/(2 Rm) Torque at max power output. …
3. MOTOR MAXIMUM EFFICIENCY: (Better mechanical output to electrical work ratio) η max= [1- Sqrt ( Io Rm / V )²] …
4. USING THIS EQUATIONS:

## What is torque in BLDC motor?

By controlling currents in the three windings, a magnetic field of arbitrary direction and magnitude can be produced by the stator. Torque is then produced by the attraction or repulsion between this net stator field and the magnetic field of the rotor.

## How much torque is required to move a car?

Overall transmission (and power-train) efficiency of the modern electric vehicles is within 59 .. 62 %. The answer to your question is 43.2 Nm of Torque required that can be obtained with the transmission ratio value of 15.

## How much torque does a 1 hp motor have?

The 3600 RPM, 1HP motor produces 1.5 ft. lbs. of torque at 3600 RPM. So if your 1HP pump was operating at 1800 RPM, the 1800 RPM motor would be producing 3 ft.

## What are the disadvantages of BLDC motor?

• Cost: Rare-earth permanent magnets are much more expensive than other permanent magnets, which leads to an increase in motor costs.
• Limited constant power range: A large constant power range is critical to achieving high vehicle efficiency.
THIS IS IMPORTANT:  What does Dave Ramsey say about extended car warranty?

## What is maximum speed of BLDC motor?

Brushless DC Motor (BLDC Motor) & Gear Motor Lineup

Output Power Gear Options Speed Range
400 W (1/2 HP) Brushless DC Motors & Gear Motors Parallel Shaft (Stainless Steel Shaft)* 80 ~ 4000 r/min Min: 0.19 [600:1] Max: 800 [5:1]
Right-Angle Hollow Shaft (Stainless Steel)*
Hollow Shaft Flat Gear
Round Shaft (no Gear)

## What is 1 Nm of torque?

Torque is measured in Newton metres (Nm) or you might see the imperial measurement of lb-ft (pounds-feet). If you want to calculate the conversion for yourself, 1 Nm is equivalent to 0.738 lb/ft.

## What is the formula for net torque?

The net torque is therefore τnet=∑i|τi|=160−60+120+10=230N⋅m.