Mechanical arm steering motor has two kinds of hollow motor and DC brushless motor. The difference lies in different structures, different principles and different functions.
1. Different structure
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1, hollow motor: belongs to DC permanent magnet servo, control motor, can also be classified as micro motor. The hollow cup motor breaks through the rotor structure of the traditional motor in the structure, using a non-core rotor, also known as the hollow cup rotor. This novel rotor structure completely eliminates the power loss caused by eddy currents in the core.
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2, DC brushless motor: The brushless DC motor is composed of the motor body and the driver, is a typical mechatronics product.
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Second, the principle is different
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1, hollow motor: hollow cup motor in the structure of the traditional motor rotor structure, the use of non-core rotor, also known as hollow cup rotor. This rotor structure completely eliminates the electrical energy loss caused by the formation of eddy currents in the iron core, while its weight and moment of inertia are greatly reduced, thereby reducing the mechanical energy loss of the rotor itself.
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2, DC brushless motor: The brushless DC motor is composed of the motor body and the driver, is a typical mechatronics product. The stator winding of the motor is mostly made of three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. A magnetized permanent magnet is attached to the rotor of the motor, and a position sensor is installed in the motor to detect the polarity of the rotor.
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Three, the functional application is different
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1, hollow motor: the application of hollow cup motor, from the military, high-tech fields into the large industrial and civilian fields, more than a decade of rapid development, especially in industrial developed countries, has been involved in most industries and many products.
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2, brushless DC motor: brushless DC motor is widely used, such as automobiles, tools, industrial industrial control, automation and aerospace and so on.
The steering motor is generally the standard rotor motor and the hollow cup motor (external rotor) in the DC brush motor. Standard motors are generally used in larger steering engines. Generally, the steering gear above 32g is a standard motor. The small steering gear uses a hollow cup motor. Because the linear control of the brushless motor is difficult and the cost is high, almost no brushless motor is used.