What is the flux of a motor?

What is the flux of a motor?

Flux: The flow of current through a conductor creates a magnetic field. Flux defines the rate of flow of a property per unit area. Flux current is the rate of current flow through a given conductor cross-sectional area.

What is the effect of an increase in the flux on the induction motor?

Higher flux increases the motor torque capability. When motor operates at higher V/Hz than rated, the overfluxing occurs, which may cause saturation of the stator and rotor magnetic core. Saturation causes overheating and can lead to motor failure.

What is flux weakening of Pmsm?

Flux-weakening control of interior permanent magnet synchronous motor (PMSM) is elaborated by presentation of current limit trajectory, speed limit trajectory and load angel limit trajectory. Flux-weakening control extends the timing range of the motor.

Why are axial flux motors better?

Produce lots of torque. An axial flux motor also has a higher power density, developing 30-40% more torque than a similar-sized radial motor, and has better cooling.

Which motor is most suitable for best speed control?

3. Constant V/F control of induction motor. This is the most popular method for controlling the speed of an induction motor. As in above method, if the supply frequency is reduced keeping the rated supply voltage, the air gap flux will tend to saturate.

How does an induction motor can overcome the limitations of DC motor?

Auxiliaries are required to start a single phase motor. During light load conditions, the power factor of the motor drops to a very low value. This is because during the start, the motor draws a large magnetising current to overcome the reluctance offered by the air gap between the Stator and the Rotor.

How does flux weakening work?

Here’s how field weakening is achieved: The d-axis of the stator current is referenced to, or in-line with, the axis of the rotor’s magnetic flux. But back EMF is created by rotor flux. So adding negative d-axis current reduces the rotor flux, which means that back EMF is also reduced.

What does flux weakening mean?

Flux weakening allows a machine to operate above base speed in constant-power, high speed region when there is a fixed inverter voltage and current [7] . Below rated speed, all of the stator current can be used to produce torque. …

Are axial flux motors better?

Are axial flux motors AC or DC?

Axial flux motors were studied by British inventor and EV enthusiast Cedric Lynch as early as 1979. His brushed DC motor design held the magnets stationary with a spinning armature activated by sliding brushes as the rotor. Lightweight, compact, and relatively powerful, the motor was ideal for electric motorcycles.

What are the two basic types of motor controls?

There are four basic motor controller and drive types: AC, DC, servo, and stepper, each having an input power type modified to the desired output function to match with an application.