Abstract
Direct current motors are used in photovoltaic systems. Important characteristics of electric motors are the starting to rated current and the torque ratios. These ratios are dictated by the size of the solar cell array and are different for the various dc motor types. The paper deals with the calculation of the starting to rated current ratio and starting to rated torque ratio of the permanent magnet, separately, series and shunt excited motors when powered by solar cells for the two cases: where (1) the system includes a maximum-power-point-tracker (MPPT) and (2) without an MPPT. Comparing these two cases, one gets a torque magnification of about 3 for the permanent magnet motor and about 7 for other motor types at rated design insolation. The calculation of the torques may assist the PV system designer to determine the advantage of including an MPPT in the system as far as the starting characteristics of the dc motors are concerned.
| Original language | English |
|---|---|
| Pages (from-to) | 47-53 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Energy Conversion |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 1993 |
| Externally published | Yes |
Keywords
- dc motors
- solar cells
- starting current and torque
