Power factor control of an induction motorUS20030122433 2002年12月27日 2003年7月3日 Bach Daniel G. Power factor control of an induction motor
Performance at the unity power factor for a 5 bus power system.───表现在单位功率因数为5总线电源系统. Voltage Control and Power Factor correction.───电压控制与功率因素调整. One of the key factors of affecting power factor of rectifiers is control technique.───控制技术是影响整流器功率因...
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Power factor correction of linear loads It is often desirable to adjust the power factor of a system to near 1.0. This power factor correction (PFC) is achieved by switching in or out banks of inductors or capacitors. For example the inductive effect of motor loads may be offset by locally...
PURPOSE:To improve a power factor of the whole circuit including a motor by providing a power-factor improving capacitor at the rear of a full-wave rectifier circuit. CONSTITUTION:An input current of a portion with a phase opposite to a motor input voltage phase is applied to reflux diodes ...
acost synchroniser to be used.[translate] a有一定吸湿性 Has certain water absorbability[translate] ause with automatic synchronisation equipment. This dispenses[translate] apower factor reactive current (VAr) of a generator whilst running[translate]...
For facilities that have power factor penalty charges, carefully choosing a high efficiency motor that also has a higher power factor can result in electric cost savings that will improve the payback time of the more costly, high efficiency motor. This paper discusses the availability of high ...
(126) for sensing the motor current and voltage and providing an output proportional to the phase difference between the motor voltage and current, and a control circuit, responsive to the output of the phase detector and to a power factor command signal, for controlling switching of the ...
asmallhorse cartwillappear Asaresult,themotorisoverloadedforalongtime.The insulationisdamagedbyheating.Evenelectric Themachinewasburneddown. (2)ifthepowerofthemotorischosentoolarge,the"bighorse cart"willappear Theoutputmechanicalpowercannotbefullyutilized,andthe powerfactorandefficiencyarenot High(seetable),...
The power factor correction is usually done by adding capacitors to the load circuit, when the circuit has inductive components, like an electric motor.Power factor correction calculationThe apparent power |S| in volt-amps (VA) is equal to the voltage V in volts (V) times the current I in...