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Aerial Work Platforms why the best use of brushless DC motor

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Aerial Work Platforms why the best use of brushless DC motor

Date:2014-11-12 00:00 Source:http://www.sortthatjobout.com Click:

Combined with the characteristics of self-propelled aerial work platforms, the current mainstream high-altitude platform selection of permanent magnet brushless DC motor as the drive motor. So, permanent magnet brushless DC motor What are the advantages of it? Permanent magnet brushless DC motor is accompanied by the digital control technology and the emergence and development, therefore, microcontroller and DSP-based digital control is the main control of brushless DC motors means. Permanent magnet brushless DC motor control following the completion of several major aspects.

Heavy aerial platforms shipped want

(1) commutation control: For position sensor system, according to the signal of the position sensor's regular commutation correctly implement the phase current is switched; for no position sensor system, to calculate the induced emf signal change to the point, to determine which phase should be energized, which phase should be de-energized.

(2) Speed Control: Brushless DC motor speed control principle the same as with ordinary DC motors can be controlled by PWM average voltage armature methods to achieve speed control. There PWM ports use microcontrollers and DSP can automatically output PWM, making it very easy speed control.

(3) the commutation control: Just change the order of power for each phase can be achieved Reversible control of the motor.

Permanent magnet brushless DC motor operation, each phase winding regularly alternating conduction, when the windings are not turned on, due to the winding coil storage, will be induced electromotive force, the induced electromotive force waveform can be detected in the winding end points come out. Using this feature of the induced electromotive force, which may be substituted on the rotor position sensor function, to obtain the commutation information. Thus, there have been more simple structure, more reliable performance permanent magnet brushless DC motor.


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2020注册绑卡秒送38元