motor control
Home » Blog » Motor control » Motor controller for a motor with FOC control

Motor controller for a motor with FOC control

Design a motor controller for a motor with the following characteristics:

PMAC motor, with sinusoidal back-EMF.
- 24V - 102V DC applications allowed with BLDC motor controller.
- Rated Continuous Current 140A.
- Peak current 400A.
- Speed: 0 - 5000rpm
- Sin/cos speed encoder

Application would be an electric motorcycle.

Which method is better to drive this motor?
Trapezoidal control was discarded because of the ripple that affects motor torque (smooth movement desired). Now, is it sinusoidal control good enough or FOC control? Sinusoidal control has some problems with high rotation speeds, but, what is considered a high rotation speed?

High rotational speed is when the RL lag of the stator windings skews the current waveform too far from the ideal phasing.

FOC can get the best from your motor in terms of torque dynamics, smoothness and torque vs. speed curve. Moreover, implementing it can be a good "investment" for future applications.

You may also like:

It is possible to power a three phase motor from a single phase power supply and using a capacitor bank to create the rotating magnetic field. Basically the capacitor banks ensures that there is a phase ...
Control circuit provides control signal to the asynchronous motor power supply (voltage and frequency adjustable) main circuit, which has the arithmetic circuit of frequency and voltage, the voltage and ...
The application will drive the choice of gear motor. If you go with brush DC motors you will save money but have a lot of maintenance. If you go brushless motor it costs more but last much longer. The more ...
A soft starter is a basic device which will ramp up the speed of your motor to full speed over a preset time, easing mechanical stress and also easing the high inrush currents which can be experienced by ...
We all know that a cable is sized by: 1.- Current carrying capacity (with all installation adjusting factors) 2.- Voltage drop 3.- Starting voltage drop (in case of motors) 4.- Short circuit
service VSD blog: A deep observation of automation control industry, especially in AC motor variable speed drive for industrial motor controls.

Hot Tags

Featured

7 months back I was involved in a harmonics evaluation study at Budweiser. This was one of many I've participated in over the past 20 years, basically because in facilities like ... Most of variable speed drives are applying on high temperature fans, kiln head coal mill fans, kiln head surplus fans, raw mill circulating fans and so on. Two production lines ... Variable speed drive application in purification system optimizes the system performance, improves purification effect, reduces power consumption greatly. According to related ... The motor power factor does not make a big difference other than giving an idea of loading. In regards to the variable speed drive fixing power factor everyone is mostly correct. ... A soft starter is a basic device which will ramp up the speed of your motor to full speed over a preset time, easing mechanical stress and also easing the high inrush currents ...

What's New