How To Improve The Power Of Micro DC Motor?

Micro DC motors are commonly used in various electrical products. Micromotors are low power motors. How to improve the power of existing low-power micromotors? This has to start from three aspects, how to design and produce this price segment, and how to create a more powerful engine. On the basis of the existing finished engine, how to increase the power?

When designing and manufacturing higher power motors, it is common practice to increase the iron core, increase the winding cross-sectional area, increase the voltage, and increase the number of coil turns. Can effectively increase power.

For micro DC motors that work for a long time, the output power is generally not the maximum power, and the rated power is usually half of the maximum power. The main reason is that when the micro DC motor is running, the coil heats up and the motor temperature rises. When the temperature rise exceeds the insulating material. When the temperature withstands, the insulating material will be damaged, i.e. the motor will burn out. To prevent the temperature of the micro DC motor. If it is too high, the micromotor must reduce power to operate and cannot operate at maximum power. In addition to rated power, rated parameters such as voltage, current, ambient temperature, and heat dissipation ensure that the temperature of the micro DC motor does not exceed the standard.

Therefore, as long as the temperature can be controlled well and not exceeding the standard, it is also feasible to increase the power of the micromotor accordingly. For example, in order to reduce the ambient temperature, the estimated operating temperature of a general micromotor is 40 degrees, and the power can be slightly increased when the ambient temperature is below zero. Or change the cooling method, if the original is natural cooling, change to forced ventilation cooling. Shell ventilation cooling can be changed to internal forced ventilation cooling. These measures allow the engine to work with more power and keep the temperature not exceeding the standard.

The specific design is generally at one end of the carbon brush of the DC motor, and a ventilation pipe is installed to connect the blower, forcing the wind to enter the motor and exhaust from the other end of the motor. Since the carbon brushes and commutator are the main heat-generating components of the DC motor, air must be supplied from this end.

Increasing the power of the DC motor can be seen from two aspects, one is the increase in the input voltage, and the other is the reduction of the motor impedance and the increase of the input current.