| 摘要 |
PURPOSE:To realize the energy saving only through the change of the voltage adjustor by converting the common load voltage plus the current with every load into the electric power and then giving the fixed processing to the converted power to adjust the load voltage down to the value which is proportional to the processed output. CONSTITUTION:Currents i1-in of each motor functioning as the load plus common secondary bus voltage (v) are applied to power converters 111-11n to perform the power conversion with every motor, and the output of conversion is squared through square circuits 121-12n. Then the outputs of circuits 121-12n are applied to multiplication circuits 131-13n to give multiplication to constants R1-Rn which correspond to the characteristics of each motor. Each of the outputs of circuits 131- 13n is added at adder circuit 14, and then the output of circuit 14 is applied to (m+2) root circuit 15 to deliver proper voltage V through multiplication circuit 16. The comparison is given to the difference between voltage V and (v) through comparator 17, and relay circuit 18 is driven by difference voltage V-v obtained through comparison of circuit 17. Then the control is given to the tap of the automatic voltage adjustor so that voltage V-v may become zero. |
