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3 Maszyny Elektryczne : zeszyty problemowe

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Porównanie wybranych regulatorów prądu w układzie sterowania silnikiem synchronicznym ze wzbudzeniem od magnesów trwałych

Piotuch R., Pałka R.

Maszyny Elektryczne : zeszyty problemowe

2011

Nr 5(93)

173-178

AC motor current controllers are much more complex than those used in DC drives, because not only does the value of the current needs to be controlled, but also the frequency. In addition, in static states, phase currents in stator windings of AC machines are quasi-sinusoidal, which makes the traditional controllers used in DC drivers (PI controllers) not the best solution (as they do not provide the best shape of the current). Complicated current controller algorithms can lead to better work in both static and dynamic states (which of course shoud be the main purpose of a control system), but can also lead to a decrease in total losses in both the inverter and the AC motor. The aim of this article is to compare several types of current controllers: PI, histeresis with constant sampling time, and predictive controller, in static and dynamic states, considering numerous criteria, as well as the losses and the electromagnetic torque ripple in the PM Synchronous Motor control system.

Sterowanie silnikiem synchronicznym z wewnętrznymi magnesami stałymi IPMS uwzględniające ograniczenia

Noga M., Gołębiowski L., Gołębiowski M., Mazur D.

Maszyny Elektryczne : zeszyty problemowe

2009

Nr 82

55-62

In this article the limitations connected with the IPMS motor operation were presented. In the static state, the limitation on a stator current, stator flux versus rotary speed of rotor ω r and on power angle δ were considered. In possible range, MTPA (Maximum Torque per Ampere) operation was predicted. The method of motor controlling that guarantees to comply with these limitations was worked out. The operation of the IPMS driving scheme in various operation ranges with control cycle Ts = 150 žs was tested by simulation. The measurements of rotor speed and two stator currents are required for proper controlling. The initial rotor position must be known also. This position is determined by means of series of voltage pulses feeding the stator at the beginning of controlling.

Określenie charakterystyk silnika synchronicznego prądu przemiennego o magnesach trwałych

Firago B., Pawlaczyk L.

Maszyny Elektryczne : zeszyty problemowe

2003

Nr 66

1-6

Owing to the (widespread) use of high energy density permanent magnets based on rare-earth metals in low-power synchronous motors, the latter's performance is much better than that of DC machines. Depending on the distribution of induction in the air-gap, voltage or current inverters are used. In this paper. mathematical models and the characteristics of a converter motor for the case when the distribution of induction in the air-gap is sinusoidal and the rotor angle position is measured continuously are considered. The motor is supplied from a voltage converter with pulse length modulation ensuring the sinusoidal course of phase currents. The motor equations were reduced to axes d-q associated with the rotor. Structural diagrams of the circuit for the perpendicular orientation of the stator flux and the rotor flux and for arbitrary angular displacement theta are presented. Equations describing the static mechanical characteristics of the power transmission system for the case when the stator flux and the rotor flux are perpendicular and for the case when the angle between them is theta are given. Selected calculations of the characteristics of a 400 W MAXON motor are presented.