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Feedback on speed
that incorporate velocity control. These new applications frequently need small and competitively priced motors to be practical. This has presented a need for a small motor and velocity feedback generator at a low cost. Signal generators attached to. Feedback on speed | Machine Design. Skip
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Application Note: Speed Regulation of Servo Systems
Note: Speed Regulation of Servo Systems. - January, 2003. Introduction. Servo systems, by definition, include the use of a feedback device to control or regulate the function required. For motor/amplifier servos, feedback is accommodated by a motor connected tachometer (or other device) which
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Technical Article: Electronic Tap Switching Voltage Regulator
mechanical counterpart. The speed and simplicity of the electronic tap switching voltage regulator does come at a price: in contrast with mechanical voltage regulators, the SCRs are easily damaged by high currents such as inrush, overload or short circuit currents. The series transformer (ST) type
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Motor Starters
new account. Request new password. Advertisement. Products. CAD Library. eBooks. Audio / Videos. Training Center. Whitepapers. Reference Centers. Motor Starters. November 15, 2002. Printer-friendly version. Full-voltage, single-speed motor starters: Single-speed squirrel-cage motors have starters
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Rotary encoders for motors
to full load of all ac-induction motors. Other induction-motor types don't even come close to matching the speed regulation of these motors. Yet, ac-induction motors are widely used mechanical power sources because of their inexpensive yet rugged construction. When coupled with variable-frequency
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Limited-Angle Torque Motors
in place. Uniform reluctance paths also make toroidally wound LATs suitable for use as limited-angle tachometers. Here, the motors are often used in pairs, one as a torquer and the second as a tachometer. The tachometer provides a reference speed signal for the motor-control circuit. LATs produce
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Selecting Dc Brush and Brushless Motors
mechanical commutation (dc motor with brushes) and electronic commutation (brushless dc motor, BLDC). Considerations of life expectancy, reliability, simplicity of actuation, and maximum speed play a role in this process. Special environmental conditions such as operation in a vacuum or the ability
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Brushless dc Motors in Medical Applications
for more-efficient, compact, and reliable medical equipment has put BLDC motors on the prescription list for a variety of applications. By definition, a brushless-dc motor is a synchronous electric motor powered by a dc-power source. While derived from the brushed-dc motor, an electronic commutation