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  • Frequency and Resolution Options for PWM Outputs
    kHz. At resolutions less than 10-bit,. of the application. For example, if the PWM output is. higher frequencies are possible (Figure 3). For exam-. being used to drive a motor through a power stage, the. ple, if 7-bit resolution is chosen, then the PWM frequen-. power transistors, (or devices) due
  • Speed Error in PWM Fan Control Systems
    versus PWM duty cycle. Author: Microchip Technology Inc. error is a function of the mass and diameter of the fan. INTRODUCTION. hub, the torque characteristics of the fan motor and the. losses in the center bearings. Air temperature and. Brushless DC fan (BDC) speed can be varied using. humidity also
  • RC Model Aircraft Motor Control
    (Disables the motor. when the battery voltage drops to a low value. As modern MOSFET transistors are developed with. which allows the radio to continue to function). lower ON resistance and smaller packages, Electronic. 8. PWM (Pulse Width Modulation) frequency as. Speed Controls (ESC) follow. By using
  • Digital Current Loops and Direct PWM Control
    the gain that can be achieved without repeatedly overshooting the mark. �� DELTA TAU. Data Systems, Inc. Digital Current Loops and. Direct PWM Control. Until recently, digital control of a motor’s current loop was not feasible – the required bandwidth. of the current loop was too high
  • Stepper Motor Control Using the PIC16F684
    . current in the windings of the motor is manipulated in a. Capture Compare PWM (ECCP) module is used to. controlled manner rather than being turned on and off. implement a microstepping technique known as high-. abruptly. torque microstepping. The microcontroller’s 8 MHz. internal oscillator allows
  • Servo Control of a DC Brush Motor
    signal is fed to a. sible to implement these servo control applications at a. power stage which translates the analog signal(s) into. significant reduction in overall system cost. usable voltages and currents to drive the motor. The servo system discussed in this application note. PWM output can
  • D/A Conversion Using PWM and R-2R Ladders to Generate Sine and DTMF Waveforms
    ) for telephone dialing, controlling the speed of a motor, generating sound and complex waveforms, and generating variable voltages in a power supply. D/A Conversion Using PWM and R-2R Ladders to Generate Sine and DTMF Waveforms. AN655. D/A Conversion Using PWM and R-2R Ladders to Generate Sine and DTMF
  • Stepper Motor Control with dsPIC (R) DSCs
    This application note describes how to drive a stepper. motor with a dsPIC33F motor control family DSC. The eight PWM channels (six pins from the PWM1. module and two pins from the PWM2 module) are used. to control a stepper motor in all possible ways, whether. it is bipolar or unipolar, using full

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