(unit + motor or complete switchgear cabinet + motor)
Based on the present-day development status of DC and AC drive engineering, and taking into account all the
systems' advantages/disadvantages mentioned above, the following guideline figures can be given:
1-quadrant drives <40...80 kW ê AC drives less expensive
4-quadrant drives >40...60 kW
(AC converter + braking resistor; see Fig. 10); ê DC drives less expensive
Regenerative 4-quadrant drives > 15 kW ê DC drives less expensive
Based on the present-day development status of DC and AC drive engineering, and taking into account all the
systems' advantages/disadvantages mentioned above, the following guideline figures can be given:
1-quadrant drives <40...80 kW ê AC drives less expensive
4-quadrant drives >40...60 kW
(AC converter + braking resistor; see Fig. 10); ê DC drives less expensive
Regenerative 4-quadrant drives > 15 kW ê DC drives less expensive
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