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由于内部损耗(譬如间隙、摩擦、IR降),一个未加调节的直流电机,在额定电枢电压下,可能损失从无负载到满载工作速度的4—5％。图中所示的反馈技术可以改善电机性能。所用的反馈类型可根据需要来选择。
An unregulated DC motor may lose between 4-5% of its full load operating speed at rated armature voltage due to internal losses (such as clearance, friction, IR drop). The feedback technique shown in the figure improves motor performance. The type of feedback used can be chosen as needed.