Industry News

Dispel The Commutator?

Views : 546
Update time : 2021-04-09 10:01:33

The insulating paint of the rotor is mainly used for curing. Generally, when the temperature exceeds 180°, it will melt and become soft. The bungee of the rotor commutator has a critical point of use temperature of less than 200 degrees. Generally, the temperature resistance of the bakelite does not exceed 300°.

We have done an experiment, the starter rotor, when it is not more than 180 degrees, or close to this temperature, the speed reaches 31000 rpm, and the commutator with bad reinforcement will break up.

During the use of the starter, if the start-up time is too long, or the start-up difficult current is too large, the rotor can easily exceed this temperature. It will even be higher.

In addition, the user will find that the vehicle did not respond when it was started for the second time. In fact, the commutator has been broken at that time. That is to say, the engine has been started before the commutator is broken.

Why is this happening?

When the rotor temperature has exceeded 200 degrees, although it has not burned, the insulating paint has become soft and the degree of solidification has weakened. At this time, the commutator bakelite is already in an overheated state, and the firmness is also decreasing. In addition, the temperature of the rotor commutator is the highest due to brush friction. However, when the load of the starter is working, the rotor generally does not rotate more than seven thousand revolutions, which is not enough to break up the rotor with bad reinforcement.

Related News
Read More >>
The Importance Of The Commutator The Importance Of The Commutator
Apr .09.2021
The commutator is the most important and complex component of DC motors and AC commutator motors.
Then Why Do You Break Up The Commutator Then Why Do You Break Up The Commutator
Sep .05.2020
When the engine is ignited, the starting opportunity will suddenly increase to more than 16,000 rpm. At this time, the overheated rotor will break up when the centrifugal force suddenly increases! The driver was not aware of it. Only when he started the n
Commutator Structure Type Commutator Structure Type
Sep .04.2020
The commutator is composed of a conductive portion, an insulating portion, and a fastening support portion. According to the different types of structures, it can be divided into arch reversing device, plastic commutator, ring-type commutator and segmente
Commutator Application Commutator Application
Sep .02.2020
An important part of the DC motor and AC commutator motor armature. The motor rotates when it rotates. It is a component that is commutated as a current on a DC motor or an AC series motor.