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DC Electric Motor Variable Speed

 

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Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors. They include a power supply, amplifier, user interface, and position control circuitry.
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  • Brushed DC Motor Fundamentals
    . FIGURE 1: SIMPLE TWO-POLE BRUSHED DC MOTOR. N. NO. SO. RT. UTH. H. Brushes. Commutator. Field. Magnet. Armature. Axle. or Coil. 2004 Microchip Technology Inc. DS00905A-page 1. AN905. Brushes and Commutator. Shunt-Wound. Unlike other electric motor types (i.e., brushless DC,. Shunt-wound Brushed DC
  • Replacing a Mechanical Adjustable Speed Drive with a Variable Speed Drive
    Retrofitting an application using a mechanical adjustable speed drive such as a Reeves Motodrive® to an AC or DC variable speed drive can be done successfully if all the details are understood beforehand. First, let's take a look at what a Motodrive really looks like conceptually. A constant speed
  • Challenges in Electric Power Measurement
    ohmmeter / microohmmeter / micro-ohmmeter. Arbitrary Waveform Generator. Calibration Service. Radiation Detector. Variable Transformer. Tachometer. Electric Power Measurement. The days of unlimited energy use belong to the past. Manufacturers of electric apparatus and machines are forced to optimize
  • Off-Road Electric Drives Gain Traction
    is not new dc-drive systems have been used for years in large mining trucks the breakthrough, says Betz, is in ac technology and solid-state semiconductors that control the motors and generator. Among the benefits, the D7E's electric drivetrain reportedly delivers excellent low-speed torque and more
  • Mighty motors
    line and facility design. The motor also delivers high torque at low speed, a benefit traditionally associated with dc motors. For example, low-base-speed permanent-magnet ac motors are the heart of a system known as the DriveIT Direct Drive Solution. This consists of a DriveIT permanent-magnet
  • AC Motors
    of motor size and weight. Single-phase multispeed motors are usually variable-torque design, but constant-torque and constant-horsepower motors are available. Power output of multispeed motors can be proportioned to each different speed. These motors are designed with output horsepower capacity
  • Appliance motors turn green
    induction motors dominated the fixed-speed appliance era, but are not necessarily the best choice for variable-speed schemes. For example, controllers, for those motors able to manage the high dynamic torque washing machines require, are expensive to create. An alternative motor type
  • Understanding Electronic Motor Drives
    and efficiency from an electric motor. A motor drive controls the speed, torque, direction, and resulting horsepower of a motor. Dc drives typically control a shunt-wound dc motor, which has separate armature and field circuits. Ac drives control ac-induction motors and, like their dc counterparts

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