What conversion method can be used to calculate the power and speed of the motor

Motor reduction ratio, torque.

1. The concept of reduction ratio: that is, the transmission ratio of the deceleration device is a kind of transmission ratio, which refers to the instantaneous input speed and transmission in the deceleration mechanism.

The ratio of the output velocity, denoted by the symbol "i". If the input speed is 1500r min and the output speed is 25r min, then the reduction ratio is: i=60:1.

Second, the calculation method of the reduction ratio.

1. Define the calculation method: reduction ratio = input speed output speed.

2. General calculation method: reduction ratio = use torque 9550 motor power motor power input speed use coefficient.

3. Gear train calculation method: reduction ratio = number of driven gear teeth number of driving gear teeth (if it is a multi-stage gear reduction, then the number of driven gear teeth of a pair of gear sets that are meshed together The number of driving gear teeth, and then multiply the results obtained.

4. Calculation method of reduction ratio of belt, chain and friction wheel: reduction ratio = diameter of driven wheel and diameter of driving wheel.

Third, the concept of motor torque:

Motor torque is the output torque of the motor, which is one of the basic parameters of the motor. The unit is cattle. m).

Fourth, the relationship between the output torque of the motor and the speed and power of the motor.

1. Formula: t=9550p n

This formula is commonly used in engineering: torque; Power; The formula for calculating the relationship between rotational speed.

Note: It should be noted that when calculating torque through the reducer, the factor of gear transmission efficiency loss should be considered.

2. The formula for calculating the torque of the servo motor: t=f*r*reduction ratio. Example: Driving a 100kg object, r=50mm, the reduction ratio is: 1:

50, find the torque of the servo motor? Answer: acceleration due to gravity).

Power (kw) = speed (r min) x torque (nm) 9550, motor output power = efficiency x input power.

The synchronous speed of the three-phase balanced old quiet asynchronous motor n=60f p (f: frequency, p: the logarithm of the magnetic pole).

The rated speed of three-phase asynchronous motor is n=(60F P)(1-S) (F: frequency, P: pole pair with simple number, S: slip rate).

1. Theoretical calculation, 2. Rotate the speedometer.

There are formulas for your problem to refer to and analyze:

Motor power: p=

Motor torque: t=9549 p n;

Motor power Torque = 9550 * Output power Output speed torque = 9550 * Beam loser leakage power Output speed.

p = t*n/9550

Formula derivation. The relationship between motor power, torque, and speed.

Power = Force * Velocity.

p=f*v--- Equation 1

Torque (t) = torque (f) * radius of action (r) Push out f = t r -- Equation 2 linear speed (v) = 2 r * speed per second (n seconds) = 2 r * speed per minute (n minutes) 60 = r * n minutes 30 --- Equation 3

Substituting the formula into Equation 1 yields:

p=f*v=t r* r*n points 30 = 30*t*n points.

-p=power only rate unit w, t = torque unit nm, n minutes = speed per minute unit revolution.

If the unit of p is replaced by kw, then the rubberized formula is as follows:

p*1000=π/30*t*n 30000/π*p=t*n 30000/

For electric motors: p=t*n 9549

where: p power, unit: kilowatts (kw);

t Torque (torque), single yard state: N·m (;

n speed, the unit of rotation is: revolution minute (r min);

9549 constant.

The analysis is as follows: motor power: p=

Motor torque: t=9549 p n;

Motor power torque = 9550 * output power output speed.

Torque = 9550 * output power output speed.

So p = t*n 9550

There are formulas for your problem to refer to and analyze:

Motor power: p=

Motor torque: t=9549 p n;

Motor power Torque = 9550 * Output power Output speed torque = 9550 * Beam loser leakage power Output speed.

p = t*n/9550

Formula derivation. The relationship between motor power, torque, and speed.

Power = Force * Velocity.

p=f*v--- Equation 1

Torque (t) = torque (f) * radius of action (r) Push out f = t r -- Equation 2 linear speed (v) = 2 r * speed per second (n seconds) = 2 r * speed per minute (n minutes) 60 = r * n minutes 30 --- Equation 3

Substituting the formula into Equation 1 yields:

p=f*v=t r* r*n points 30 = 30*t*n points.

-p=power only rate unit w, t = torque unit nm, n minutes = speed per minute unit revolution.

If the unit of p is replaced by kw, then the rubberized formula is as follows:

p*1000=π/30*t*n 30000/π*p=t*n 30000/

There are formulas for your problem to refer to and analyze:

Motor power: p=

Motor torque: t=9549 p n;

Motor power Torque = 9550 * Output power Output speed torque = 9550 * Beam loser leakage power Output speed.

p = t*n/9550

Formula derivation. The relationship between motor power, torque, and speed.

Power = Force * Velocity.

p=f*v--- Equation 1

Torque (t) = torque (f) * radius of action (r) Push out f = t r -- Equation 2 linear speed (v) = 2 r * speed per second (n seconds) = 2 r * speed per minute (n minutes) 60 = r * n minutes 30 --- Equation 3

Substituting the formula into Equation 1 yields:

p=f*v=t r* r*n points 30 = 30*t*n points.

-p=power only rate unit w, t = torque unit nm, n minutes = speed per minute unit revolution.

If the unit of p is replaced by kw, then the rubberized formula is as follows:

p*1000=π/30*t*n 30000/π*p=t*n 30000/

1. The formula for calculating the output power of the motor is: P tn 9549t is the torque and N is the speed.

Therefore, knowing the rotational speed and voltage does not accurately calculate the output power of the motor.

2. The input power calculation formula of the motor is: p=ui (DC motor), or p=uicos (single-phase AC motor), or p= 3uicos (three-phase AC motor).

where u is the voltage, i is the current, and is the phase difference between the phase voltage and the phase current.

Therefore, knowing the voltage and rotational speed cannot accurately calculate the input power of the motor.

3. In the case of specific loads, the input power and output power of the motor can be estimated by combining the motor nameplate parameters and the speed and voltage of the motor.

Speed and voltage cannot determine power, only these two conditions can not calculate power.