What does the power rating of a DC motor mean?

What does the power rating of a DC motor mean?

The power input (current times voltage) is a good indicator of the mechanical power output. At this point it is drawing the maximum amount of current and applying maximum torque. A low voltage (e.g., 12 Volt or less) DC motor may draw from 100 mA to several amperes at stall, depending on its design.

Is it bad to stall a DC motor?

Yes, you can stall a smaller DC motor briefly (3 to 5 seconds is fine), at its rated full load current. The windings will heat up, and there will be some excessive heating of the commutator, but that usually doesn’t affect the service life.

What is rated torque of DC motor?

The rated torque is the maximum continuous torque that the motor produces at rated RPM when working normally and without overheating, whereas the stall torque is produced by the motor when RPM is 0 while the load is attached or at starting. DC Motors manufacturers usually provide the stall torque rating.

What happens if you run a 12 volt trolling motor on 24 volts?

When run at 24 volts the coils will heat up much faster than at 12 volts, and the motor will not be able to release the heat quickly enough. Eventually the magnetic coils will become so hot that the insulation melts and shorts out, or the insulation starts charring and burning until it again shorts out.

What does 12V DC mean?

AC means Alternating Current and DC means Direct Current. For example: a 12V AC power supply has an alternating voltage (which will make an alternating current flow).

What does DC motor mean?

Direct Current
A Direct Current (DC) motor is a motor that turns energy from a direct current and turns this into mechanical energy. The first DC motor was developed around the 1830’s-1840s. They were commercially unsuccessful, because these motors were battry powered and batteries were still very expensive and the quality was low.

Why does a DC motor stall?

DC Motor Torque speed Characteristics When the load is further increased above its overload region, the speed of the motor gradually reduces and the motor stalls. Since the motor is not rotating, there will be no back EMF and so the power consumption will be the maximum.

What is a 12 volt motor with a 500 rpm rating?

Ratings mean Max Value. It means you can provide it with a Max Supply Voltage of 12 Volts. And when supply is 12 V, the shaft or anything connected to it will rotate at a speed of 500 RPM. Going for higher voltages will cause insulation breakdown in the motor winding.

What is the standard input speed of a 12V DC motor?

It means that the standard input for the DC motor to function at its optimum efficiency is 12V DC and under rated load condition and at this standard input the speed at which the motor shaft rotates is 500 rpm.

What is meant by 12V DC and under rated load condition?

It means that the standard input for the DC motor to function at its optimum efficiency is 12V DC and under rated load condition and at this standard input the speed at which the motor shaft rotates is 500 rpm. A DC motor speed can be varied by giving a variable input voltage,but the for rated speed you have to give the rated voltage.

How can I determine the RPM of a motor?

Google the motor’s type name and try to find the data sheet. It usually specifies the current at a given voltage to produce the optimal RPM. If you have a lab supply with a current limiter you can see the momentary current when you run it. Run it at 12 volt and increase the current limiter until the current is stable.