Moottorin paikkasäädön toteutus dsPIC-ohjaimella

Työssä suunniteltiin nostinsimulaattorin z-akselin suuntaiselle moottorille paikkasäätö ja sen ohjaus CAN-väylää pitkin. Työ toteutettiin projektiryhmässä, jossa eri henkilöt vastasivat eri osa-alueista. CAN-kommunikointi saatiin toimimaan ja lisäksi moottorilta pystyttiin lukemaan paikkatieto talteen. Moottorin säätö jäi vielä puuttumaan.

Kestomagneettitahtikonekäyttöjen erot

Permanent magnet drives with nominal power over 10 kW were not a cost-sufficient system 25 years ago due to high material expenses. The improvements in motor drives, the rise in competition and the tightening of standards and regulations have caused that the PM-drives are more and more common in the over 10 kW nominal power range. The goal of this thesis is to research the performance in relation to nominal power of a PM-drive technique that is vastly increasing its popularity in fan related devices. The studied motor technique brushless direct current drive (BLDC) consists of a voltage source inverter, permanent motor and six-step-control. The reference drive is a brushless alternating current drive (BLAC) which consists of a VSI, PM and a hysteresis control. As a conclusion there are no major obstacles that would impede the BLDC-drive technique from expanding to larger power stages. The following factors must be taken into consideration when designing a BLDC-drive: motor’s current change rate, inverter switching frequency, motor’s nominal electric frequency, phase inductance and the current handling capability of the inverter. The fluctuating material costs create instability to the end prices of PM-motors that can in the worst case lead to diminished interest towards BLDC- and PM-drives in general.