How could you modify a DC motor to increase efficiency and control the speed?

Thus, the speed of a DC motor can be controlled in three ways:

• By varying the supply voltage.
• By varying the flux, and by varying the current through the field winding.
• By varying the armature voltage, and by varying the armature resistance.

What affects the efficiency of a DC motor?

Motor performance depends on three elements such as voltage across terminals, resistance across terminals, and magnetic force.

How can I increase the RPM of a 12v DC motor?

You can increase the rotational speed of the DC motor by increasing the excitation current over the field coil of that motor or by increasing the field fluxes in the airgap of the motor ..

How do you control the speed of a DC shunt motor?

In the shunt motor, speed can be controlled by connecting a variable resistor Rc in series with the shunt field winding. In the diagram below resistor, Rc is called the shunt field regulator. Figure: (a) Speed control of a D.C. shunt motor by variation of field flux.

How do you increase the starting torque of a DC motor?

Any DC motor will experience a decrease in speed when a load is applied, which causes the back EMF to decrease. The reduction in back EMF increases the net voltage, since the supply voltage remains constant. The net voltage increase causes the armature current to increase, which increases the motor torque.

How do you increase the torque of a DC motor?

To increase the torque that a bit harder. All you can do, electrically (as you can do it mechanically via gears), is to reduce the source impedance to maximise the current that can be delivered for a given stator impedance. Rewind it with more turns of thinner wire.

What is DC motor efficiency?

The efficiency of a DC motor is defined as the ratio of output power to the input power.

What is the efficiency of a DC machine?

Order of efficiency of rotating d.c machine is about 80 \% to 85 \%.

What are the advantages of flywheel?

Offering nonstop energy where the source of energy is discontinuous. As an illustration, flywheels are utilized in reciprocating motors since the power source, torque from these motors, are irregular.

Can I use an electric motor with a flywheel?

No, the only use a flywheel would have in conjunction with an electric motor is when an intermittent load requires more power than a motor can deliver on its own. Rock crushers, metal shears and punches and other equipment use stored flywheel energy to deliver many times the available horsepower of a drive motor for a short period of time.

Do flywheels lose energy when charged?

Flywheels can be charged by electric motors when there is excessive electricity. It can also act as a generator when discharging. Due to the existence of friction, eventually flywheels will lose some energy.

What is flywheel energy storage (FES)?

Flywheel energy storage (FES) is one of the most efficient technologies for storing electric energy in the form of kinetic energy by constantly spinning a disk or the rotor of a flywheel. The key components of FES systems are a rotating cylinder, bearings, a generator or motor, and a container to accommodate the flywheel [9 ].