Dongguan Langyi Electromechanical Technology Co., Ltd.

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What is the rated current? What is no-load current? What are the rated parameters of DC motors?


[Guide] Presumably everyone has understood the rated current and load current of micro DC motors. The ratings are very important in the actual application of micro motors. Let ’s take a look at what ratings are available for micro motors.


When judging whether a miniature DC motor is suitable, parameters are important criteria such as size, speed, rated current, load current, and so on. It is not difficult to find in the parameters that the rated current and the rotation speed under the load current are different. So what is the rated current? What is the load current? What is the difference between them?


To understand it simply, the rated current of the micro DC motor refers to the maximum current allowed during normal operation; and the load current refers to the working current of the micro motor load. If the load current of the micro motor is greater than the rated current, the motor will overheat and run. Finally burned. Take the wall socket in our daily life, the rated voltage and current are 220V, 10A, but when a 220V 30A electrical appliance is connected, the socket will be burned because it can only withstand 10A current, as is the miniature DC motor. Similarly, the rated value must not be exceeded, otherwise the motor will be burned. In addition to the rated current and load current, there is another kind of current, which is the current that passes through the stator windings when the micro DC motor is running at no load. This is called no-load current.


电机


Micro DC motor


Everyone must have understood the rated current and load current of micro DC motors. The ratings are very important in the actual application of micro motors. Let ’s take a look at the ratings of micro motors.


1. Rated current: As mentioned earlier, the maximum current allowed by the motor when the miniature DC motor operates in normal mode, expressed in units A;


2. Rated voltage: the same meaning as rated current, that is, the maximum applied voltage can be applied to the miniature DC motor for safe operation, expressed in units of V;


3. Rated power: refers to the output power provided by the micromotor under rated operating conditions, that is, the output mechanical power on the shaft of the micromotor, expressed in units of W;


4. Rated speed: The operating speed of the miniature DC motor at the rated current, voltage and power, expressed in units of r / min.


Miniature DC motors are very common in various electronic products, such as razors, massagers, electric toys, etc. Due to their simple control, high efficiency, and small size, they can be seen in various products In the product development, the rated parameters of each micromotor gave important reference values.



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