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  • Low-Cost DC Motor Speed Control with CMOS ICs
    Two low-cost CMOS ICs manage a 12 VDC, current-limited speed control circuit for DC brush motors. The circuit design (see Figure 1) uses PWM (pulse width modulation) to chop the effective input voltage to the motor. Use of CMOS devices gives the benefits of low power, minimal heat and improved
  • DC Motors
    Industrial applications use direct current motors because the speed-torque relationship can be varied to almost any useful form -- for both motor and regeneration applications in either direction of rotation. Continuous operation of dc motors is commonly available over a speed range of 8:1
  • Understanding Continuous Speed in DC Motor Applications
    Brushed and Brushless DC motors have two traits that make them easy to control for several applications. The first is the relationship between voltage and speed, and the second is the relationship between current and torque. Both relationships are separate from each other but you can see how
  • How to speed up dc motor selection
    Recent advances in electric motors and controllers improve their speed, acceleration, controllability, and reliability, while allowing designers a wider choice of power and torque. Selecting a fractional hp dc motor is easier when you know how to handle motor constant . Guidelines used by experts
  • Dc motor impersonators
    Special algorithms make ac induction motors respond like variable-speed dc motors for fast PID control. The rotating speed of ac induction motors is determined by the frequency of ac applied to the stator, not the applied voltage. However, stator voltage must also drop to prevent excessive current
  • Brush DC Motor Basics
    Brushed DC ironless motors are found in a large variety of products and applications such as medical, robotics, factory automation, security and access, civil aviation and aerospace products. The ironless technology surpasses by far the performance of conventional ironcore brushed DC motors
  • Servo Control of a DC Brush Motor
    of the PIC17C42 as a DC brush motor servo controller. It is shown that a PID (Propor-tional, Integral, Differential) control calculation can be performed in less than 200 ms (@16 MHz) allowing control loop sample times in the 2 kHz range. Encoder rates up to 3 MHz are easily handled by the PIC17C42's
  • Crouzet DC Motor Tech Guide (.pdf)
    Many applications call for a high start-up torque. The DC motor, by its very nature, has a high torque vs. falling speed characteristic and this enables it to deal with high starting torques and to absorb sudden rises in load easily. The speed of the motor adjusts to the load. Furthermore, the DC

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