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  • Monitoring Temperature and Power on Aging 3-Phase Compressor Motors
    CAS DataLoggers recently helped a frozen product manufacturer to monitor temperature and perform power factoring on several large 3-phase compressor motors used for refrigeration. As these compressors aged through valve leakage and piston ring deterioration, the AC temperatures fluctuated which
  • Controlling 3-Phase AC Induction Motors Using the PIC18F4431
    than the PIC18F452 or PIC16F7X7. Practically speaking, control of a 3-phase AC induction motor requires pulse-width modulated control of the six switches of a 3-phase inverter bridge connected to the motor's stator windings (Figure 1). The six switches form 3 pairs of "half-bridges", which can
  • Bidirectional VF Control of Single and 3-Phase Induction Motors Using the PIC16F72
    Single-phase induction motors are extensively used in appliances and industrial controls. The Permanent Split Capacitor (PSC) single-phase induction motor is the simplest and most widely used motor of this type. By design, PSC motors are unidirectional, which means they are designed to rotate
  • Speed Control of 3-Phase Induction Motor Using PIC18 Microcontrollers
    Induction motors are the most widely used motors for appliances, industrial control, and automation; hence, they are often called the workhorse of the motion industry. They are robust, reliable, and durable. When power is supplied to an induction motor at the recommended specifications, it runs
  • VF Control of 3-Phase Induction Motors Using PIC16F7X7 Microcontrollers
    An induction motor can run only at its rated speed when it is connected directly to the main supply. However, many applications need variable speed operations. This is felt the most in applications where input power is directly proportional to the cube of motor speed. In applications like
  • VF Control of 3-Phase Induction Motor Using Space Vector Modulation
    VF control using the Sine PWM algorithm is a popular algorithm for AC induction motor control; however, this algorithm has certain drawbacks which affect the overall system efficiency. A more advanced switching algorithm, like Space Vector Modulation (SVM), overcomes the drawbacks of the Sine PWM
  • Understanding Electronic Motor Drives
    that require reliable, efficient motor operation in hazardous or wash-down environments. It responds to input signal changes in as little as 5 msec, covers a 0.5 to 3-hp range, and an input voltage range of 380 to 500 Vac three phase. The rotor and stator work through magnetic interaction
  • Will the Small Motor Rule Affect You?
    for Open Drip Proof, General Purpose motors in both single and three phase designs. Dubbed the Small Motor Rule, horsepower ratings covered include 0.25 thru 3 HP (and kW equivalents) with speed ranges of 1,200 - 3,600 RPM operating from 60 Hz frequency.

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