A triac-based drive with an optimal efficiency voltage controller is proposed.
The controller is easily implemented since an experimental procedure is used for adjusting its parameters.
The double-revolving-field concept is employed in the theoretical analysis and a relation between the main and auxiliary stator currents is derived that accomplishes optimal efficiency under constant torque operation.Three-phase motors are widely used because they are reliable and economical. Seriöse singlebörse hamburg The rotating magnetic field is easily achieved in three-phase asynchronous motors because the phase angle offset between the individual phases is 120 degrees.A pulse-width-modulated (PWM) AC chopper changes the effective value of the supply voltage applied to a single-phase induction motor.This variable supply voltage gives the ability to control the speed of the motor.
Application of single phase induction motor
The video below shows an easy to understand explanation of the working principle of the AC induction motor.AC induction motors usually use two or more coils to generate a rotating magnetic field, which produces torque on the rotor.Moreover, the proposed control scheme satisfies all of the prerequisites of simplicity, reliability, and cost-effectiveness that are imposed by the utilization of a single-phase motor. Several experimental results are presented to validate the effectiveness of the proposed efficiency optimization control method. Although carefully collected, accuracy cannot be guaranteed. Differing provisions from the publisher's actual policy or licence agreement may be applicable.Results of simulations and laboratory tests are compared, showing close agreement.
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This scheme may be a cost effective alternative to tapped-winding or pole-changing motors ABSTRACT: This work presents a variable speed control method for fan applications.One way to improve on the single coil design is by using an auxiliary coil in series with a motor starting capacitor.The auxiliary coil, also called starting coil, is used to create an initial rotating magnetic field.However, single-phase AC motors require external circuitry which creates the phase angle offset in order to produce a rotating magnetic field.This circuitry can be realized using advanced power electronics, or more simply using a motor capacitor.