Prediction of Audible Magnetic Noise Radiated by Adjustable-Speed Drive Induction Machines

Two Switch Adjustable-Speed Drive with Single-Phase Induction Machine

A novel low-cost drive with a single-phase induction machine for HVAC applications that can operate at either full or reduced speed is proposed. An experimental drive based on the presented setup has been developed and built to verify its practical viability and properties. The paper presents results of investigation obtained by means of numerical simulations as well as experiments and discusse...

Acoustic noise radiated by PWM-controllel induction machine drives

This paper investigates the acoustic noise radiated from two nominally identical induction motors when fed from sinusoidal, and asymmetric regular sampling subharmonic and space-vector pulsewidth modulation (PWM) converters. The theory for analyzing the noise spectrum is developed further to account for the interaction between the motor and the drive. It is shown that manufacturing tolerances c...

Noise of Induction Machines

Adjustable Speed Drive Control Based on Random Pulse Width Modulation

The Pulse Width Modulation (PWM) power electronics systems often produce objectionable acoustic noise at the PWM switching frequency. For example, in a fan / blower drive, the drive used for the blower should use “spread spectrum PWM” technology (also known as Random PWM) where acoustic noise radiating through the duckwork is a very seriously concerned. This paper shows the theoretical basis fo...

A FUZZY-BASED SPEED CONTROLLER FOR IMPROVEMENT OF INDUCTION MOTOR'S DRIVE PERFORMANCE

Induction motors (IMs) are widely used in many industrial applications due to their robustness, low cost, simplicity and relative good efficiency. One of the major considerations for IMs is their speed control. PI (proportional-integrator) controllers are usually used as speed controller. Adjusting the gain of PI controller is time-consuming which needs thorough considerations. Hence, fuzzy con...