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Parts by Number Top

Part # Distributor Manufacturer Product Category Description
PWM PLC Radwell Southcon Ind Controls Drives, Drive DRIVE AC 10000I 20HP 27AMP 460V 60HZ 3PH
PWM1000 PLC Radwell Relcon Not Provided DRIVE VARIABLE SPEED AC
FA-4PWM Automationdirect.com Not Provided Drives / AC Drives (Hitachi) / Hitachi Spare Parts & Accessories Pulse Width Modulation filter to produce analog speed reference signal from drive to an analog sensing device (such as a meter or PLC analog input)
MMXL05D240AC PLC Radwell Minarik Electric Co Drives, Drive DRIVE PWM MOTOR CONTROL 115/230V 1/4-1/2 HP
dsPIC33FJ64GP802 Microchip Technology, Inc. Microchip Technology, Inc. Not Provided via DMA: - Allows data transfer between RAM and a peripheral while CPU is executing code (no cycle stealing). . Most peripherals support DMA. Timers/Capture/Compare/PWM: . Timer/Counters, up to five 16-bit timers: - Can pair up to make two 32-bit timers. - One timer runs as a Real-Time Clock...
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Conduct Research Top

  • Braking and Regenerative Energy with AC Drives
    someplace. In the case of an AC PWM drive, that someplace is back to the DC bus (The DC bus is that portion of the drive after the rectifier section where DC power is collected and stored for use by the inverter section). d7743.qxd Braking and Regenerative. Energy with AC Drives. Application
  • Using AC PWM Drives on Non-Standard Voltages and Frequencies
    Often, there may arise the need to apply an AC PWM drive1 to input voltages such as 200, 208, 380, 415 and possibly other levels, as well as input frequencies such as 50 Hz. The AC PWM regulator utilizes a switching power supply for control power that is sourced from a DC bus. This gives the unit
  • Incompatibility of Power Factor Correction Capacitors with AC PWM Drives
    factor as seen by the user's line. A bank of these oil-filled or dry type AC capacitors usually reside in a conspicuously placed metal enclosure nearby the motor. Beware of retrofitting any AC controllers (including VVI and CSI types) to existing induction motors! If the installation is not thoroughly
  • Adjustable Speed Drives as Applied to Centrifugal Pumps
    this article was originally published is in AC technology. The dominant method of AC control is by PWM inverters, particularly with the advent of the high speed Insulated Gate Bipolar Transistors (IGBTs). This will be the only drives technology to be considered in this revisited analysis
  • Replacing Your DC Motors? Think AC
    a solid-state, adjustable-frequency inverter that adjusts frequency and voltage to vary the speed of an otherwise fixed-speed AC motor. This control is typically produced through pulse width modulation (PWM) of the drive output to the motor. Voltage and frequency are maintained in a constant relationship
  • Controlling 3-Phase AC Induction Motors Using the PIC18F4431
    . upon the load. To drive an AC induction motor, the 3-phase inverter. FIGURE 2: OPEN-LOOP V/f CONTROL. bridge is driven by a microcontroller’s PWM outputs, as. BLOCK DIAGRAM. shown in Figure 2. By changing the PWM duty cycles. in a regular manner, the PWM outputs are modulated. Speed. to synthesize
  • Energy-Saving Potential of Solid-State AC Drives in VAV Systems
    , remains relatively constant. Figure 11. Variable Inlet Vane Control. Figure 12. Eddy Current Coupling Control. An alternative to these three VAV methods is the AC adjustable. Comparing figures 10, 11, 12 and 13, clearly shows that signifi-. speed drive. The drive consists of a PWM controller
  • Measuring Linear and Non-Linear AC Waveforms with CurrentWatch (.pdf)
    Variable frequency drives (VFDs) improve control and conserve energy by regulating motor speed. The most. common types are PWM (pulse width modulation) and Six Step. Both technologies are based on high speed switching, which distorts the AC sine wave and can make accurate current sensing difficult

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