来源：http://www.jnmcd.com 发布时间：2019-01-16 浏览：次
DC brushless reducer has the characteristics of fast response, large starting torque, zero speed to rated speed and rated torque. However, the advantage of DC motor is its disadvantage, because DC motor will produce constant load under rated load. Instantaneous performance, armature and rotor magnetic fields must be maintained at 90 degrees, which will require carbon brushes and commutators. Carbon brushes and commutators generate sparks and powders when the motor rotates.
Therefore, in addition to damage parts, the use of carbon brushes and commutators is also limited. DC brushless reducer has no carbon brush and commutator. They are maintenance-free, robust and widely used. However, complex control techniques must be used to control the characteristics of DC motors.
Semiconductors are developing rapidly nowadays, and the switching frequency of power devices is faster, which improves the performance of driving motors. Microprocessors are also becoming faster and faster. The AC motor controller can be placed in the rotating two-axis Cartesian coordinate system, and the two axis current components of the AC motor can be correctly controlled to achieve similar DC motor control, and can be comparable to the DC motor. Performance.
When the number of poles is fixed, the rotor speed can be changed by changing the frequency of the stator rotating magnetic field. DC brushless reducer is a synchronous motor plus electronic control (driver), which is used to control the frequency of stator rotating magnetic field, and feedback the speed of motor rotor to the control center for repeated calibration, in order to achieve characteristics similar to DC motor.
In other words, when the load changes within the rated load range, the DC brushless motor can control the motor rotor to maintain a certain speed.
The above information is our Shandong micro-motor collation and publication hope to help you all on our website: http://www.jnmcd.com!