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    Low-power brushless motor and secure good sell

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    Low-power brushless motor and secure good sell

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

    Brushless motor forces in the territory to expand quickly. A traditional small motor systems, applications, mostly for AC motors single-phase induction motor (Single-phase Induction Motor), then there are some applications for the market to replace its higher efficiency DC brush motor (Brushed DC Motor); however, , in order to reduce power loss caused by the brush and dangerous, the use of semiconductor elements and the electronic circuit to change the magnetic field and produce the motor power of the brushless motor is constructed, is the rapid rise in the market.


    STMicroelectronics (ST) Greater China, South Asia Pacific product marketing manager cum Yangzheng Lian said that although the brush DC motor in the circuit design, easy to control the direction of rotation, and the static torque high starting torque large, but because of containing brushes (carbon brush) structure, during operation will cause significant power loss and reduce overall motor output power, making it less than ideal energy efficiency.


    Brushed DC motors are by current flowing through the brush, and then the armature is rotated, and the vertical magnetic field generating system via the brush and the commutator (Commutator) is adjusted so that the current flowing into the armature, the magnetic field change can be controlled . In addition to its shortcomings due to the power loss caused by brush friction, more security concerns, because between the brush and commutator easy to produce sparks, dirt and must be cleaned regularly brush friction generated, or replace brush, do not add to the convenience of use.


    As for the brushless motor design, mainly to resolve the DC brush and commutator brush motor power loss problem, how it works and have the biggest difference Brushed DC motor, is changed to an electronic control circuit, the rotor and stator magnetic field can be maintained at 90 degrees out of phase, together with the appropriate drive circuit, the effective control of the commutation timing to improve efficiency or increase the speed range.


    In addition, due to the brushless motor is produced by the magnetic field so that the armature coil operation, less friction with the shaft of the brush, so more power, quiet.


    Notably, change to the brushless motor control electronic circuit mode, but also to a semiconductor element and Suppliers have a chance to show its mettle. Yangzheng Lian said that in the past the traditional architecture of the motor, just a simple input and output voltage can be operated without complex magnetic field control and inverter demand, which focuses on the mechanical design of parts, so the microcontroller (MCU), power components only supporting role; however, the magnetic field generated by electronic circuits constructed brushless motor control, letting the MCU and power semiconductors became a popular hero of the motor of the world.


    Yang Zhenglian analysis, stress control motor speed, accuracy and other parameters of the immediacy and accuracy of the internal control components not only have high performance, also a perfect software algorithms support, so now in addition to providing a complete MCU vendors outside the development platform, the software will synchronize database build; to STMicroelectronics, for example, not only to provide security to seek international (ARM) Cortex-M0 Cortex-M4 to a full range of hardware development kit for the different levels of motor control applications the average will be updated once every three months, the database software, allowing the motor to achieve the most accurate calibration developers through software calculations.


    Related Tags:DCbrushlessmotorcarseries

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