How to verify the power of the motor and how to see what the rated power of the motor is?

The best thing to do is to test with a dynamometer.

But the motor output power is a curve.

The rated power at the time of actual use depends on the load.

Alternatively, you can define the maximum output power of the motor when it can meet the duty system specified in the nameplate as the rated power.

Look at the nameplate data of the motor. The rated power of the motor refers to the shaft output power of the motor.

Measure the current when the motor is running, the current multiplied by the voltage is the power, and I really help you look forward to it

When the motor is loaded, the input voltage is measured, and then the current is measured, and the power is equal to the voltage multiplied by the current.

The current is different when the voltage is different and the motor power is the same. Use a clamp meter to measure the three-phase current when the motor is running, take the highest value, and the current will be different for different three-phase voltages. Generally, the three-phase motor is power x2 = current, and then you can choose (thermal overload relay) and (AC contactor) to protect the motor from being burned.

The calculation is not very accurate, because the calculation is the rated current.

The rotor current of the motor at no load is about equal to zero, and the stator current is basically the excitation current, and its main component is the magnetizing current, therefore, the power factor at no load is very low, about. After the load is added to the motor, the rotor current increases, the output mechanical power increases, and the active component in the stator current increases, so the power factor of the stator increases rapidly.

When the load increases to a certain extent, the slip rate is larger due to the increase of the load, the phase angle between the voltage and current of the rotor is larger, the power factor of the rotor decreases, and the power factor of the stator also decreases. In other words, in the entire normal operating range, there is only a maximum power factor at a certain load, which usually makes the maximum power factor near the rated load or slightly lower than the rated load, generally, and the power factor is very low at no load and light load.

The power of the test motor is divided into two kinds, the electrical power of the motor and the mechanical power of the motor, the electric power can be directly tested with a power meter and an electric meter, of course, if you want to test more accurately, the power meter will be more suitable; To test the mechanical power of the motor, you need to know the speed and torque of the motor, and the mechanical power of the motor can be calculated through these two parameters.

The power of the test motor is divided into two kinds, the electrical power of the motor and the mechanical power of the motor, the electric power can be directly tested with a power meter and an electric meter, of course, if you want to test more accurately, the power meter will be more suitable; To test the mechanical power of the motor, you need to know the speed and torque of the motor, and the mechanical power of the motor can be calculated through these two parameters.

First of all, what is the motor? 220v or 380v? The current is different when the voltage is different and the motor power is the same.

Use a clamp meter to measure the three-phase current when the motor is running, take the highest value, and the current will be different for different three-phase voltages. Generally, the three-phase motor is power x2 = current, and then you can choose (thermal overload relay) and (AC contactor) to protect the motor from being burned. The calculation is not very accurate, because the calculation is the rated current.

No, there is no power factor, it can only be estimated, and the error is very large, and it is meaningless. It can be estimated by measuring the electricity consumption with a watt-hour meter, which is the most accurate, but it does not reflect the instantaneous value. Therefore, the most practical thing is to monitor the current and temperature and not exceed it.

Current multiplied by voltage is generally taken as a power factor.

However, this is measured based on the drag load of the motor.

The actual power that the motor can carry should be determined by the coil, and it is impossible to measure the simplest can only be estimated according to the heat.

Learn about the integration algorithm of dynamic measurement.