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DC coreless brush motor
driving circuit design
DC coreless brush motor, which is DC Coreless Brush Motor,
through the coil rotation, belonging to the outer rotor,
large torque, the characteristics of the motor, the linear
voltage height, determine the speed, common brush motor, to
be current decision speed, Phase motor, through the six-step
square wave, PWM speed, relatively speaking, the hollow cup
motor, linear voltage, constant current, adjustable speed,
and has a very stable rotation characteristics, making it a
certain market positioning, Speed, and the stability of
ultra-high rotation, vibration, RPM: 8000 ~ 60000 rpm,
common in mobile phone vibration / four-axis aircraft /
adult electric toys / medical equipment / precision grinding
equipment.In recent years, more and more people, From the
original toys, mobile applications, to industrial
applications.
Basically, the motor does not need to be too complex circuit
drive, given the rated voltage will be linearly adjust the
speed, but consider other factors, such a drive design, but
necessary to exist.For example, multi-axis aircraft, need to
control different Motor speed, in order to achieve air
balance requirements. Hand tool over-current protection, but
it is worth noting that the hollow cup motor, not alone with
an adjustable step-down IC, simple direct drive, in some
current conditions, IC Overheating burned out, resulting in
product yield and life issues, or to a professional drive
circuit, for protection, the product was safe and reliable.
1. High and low linear voltage control.
2. Over-current protection design
3. Temperature considerations
4. Automation
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