Experimental Research on Parameters of a Late-Model Hydraulic-Electromotor Hybrid Pumping Unit

<div>Electromotor power comparison curves under different speed of hybrid system. (a) The speed of the hybrid system is 730 r/min; (b) The speed of the hybrid system is 530 r/min.</div>

Mathematical Problems in Engineering

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Figure 9

Figure 9: Experimental Research on Parameters of a Late-Model Hydraulic-Electromotor Hybrid Pumping Unit 