Pulse Width Modulated (PWM) Drives

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Pulse Width Modulated (PWM) DrivesAC Drives Using PWM TechniquesPower Conversion UnitThe block diagram below shows the power conversion unit inPulse Width Modulated (PWM) Drives . In this type of drive, adiode bridge rectifier provides the intermediate DC circuitvoltage. In the intermediate DC circuit, the DC voltage is filteredin a LC low-pass filter. Output frequency and voltage iscontrolled electronically by controlling the Width of the pulses ofvoltage to the , these techniques require switching the inverterpower devices (transistors or IGBTs) on and off many times inorder to generate the proper RMS voltage GeneratorThis switching scheme requires a more complex regulator thanthe Variable Voltage Input (VVI). With the use of amicroprocessor, these complex regulator functions areeffectively handled. Combining a triangle wave and a sine waveproduces the output voltage Conversion Unit (PWM) Pulse Width Modulated (PWM)TriangleGeneratorModulationGenerato rPWMThe triangular signal is the carrier or switching frequency of theinverter.

Pulse Width Modulated (PWM) drives. In this type of drive, a ... Modulation Generator PWM. The triangular signal is the carrier or switching frequency of the ... Field Oriented Control Block Diagram Pulse Width Modulated (PWM) Below is a plot of a drive using the Sensorless version of Force Technology.

  Control, Pulse, Modulation, Width, Pulse width