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What Are The Causes Of The Heating Of The Woodworking Engraving Machine Motor?
- Jun 21, 2018 -

The spindle motor is an important component of the computer engraving machine, and its performance has a crucial influence on the performance of the computer engraving machine. Machining spindles usually fall into two categories: precision machining spindles and high-power cutting spindles.


1, why the motor into the heat for a variety of stepper motor, the internal is composed of iron core and winding coil. Windings have resistance, and power will produce losses. The loss is proportional to the square of the resistance and current. This is what we often call the copper crucible. If the current is not a standard DC or sine wave, it will also produce harmonic losses; the core has hysteresis The eddy current effect also produces losses in an alternating magnetic field. Its size is related to material, current, frequency, and voltage. This is called iron loss.


Both copper loss and iron loss are manifested as heat, which affects the efficiency of the motor. Stepping motors generally seek positioning accuracy and torque output, the efficiency is relatively low, the current is generally large, and the harmonic components are high, the frequency of the current alternating changes with the speed, so the stepper motor generally has a heating condition, and the situation is more general Severe AC motor.


2. Reasonable range of motor heating The extent to which motor heating is allowed depends on the internal insulation level of the motor. Internal insulation performance will be destroyed at high temperatures (above 130 degrees). So as long as the inside does not exceed 130 degrees, the motor will not be damaged, and the surface temperature will be below 90 degrees.


Therefore, the stepper motor surface temperature is 70-80 degrees are normal. A simple temperature measurement method can be used with a thermometer, and it can also be roughly judged: You can touch it for more than 1-2 seconds, not more than 60 degrees by hand; you can only touch it with your hand, about 70-80 degrees; It turned out to be more than 90 degrees.