motors with cage-type rotors and those taken by d.c. machines, generally to the detriment of the a.c. machine. Although it is true that cage motors generally take starting currents in the range 4 to 7 times full load current whilst those of d.c. machines are normally much less, the ...
Starting and Speed Control of d.c. MotorsThe subject of speed control is vast, and it is only necessary here to outline the possibilities. A large amount of space has been devoted to thyristor converter systems, which have been the main growth area in recent years. For large industrial ...
By series resistance in parallel with the field winding of the motor. The resistance is then known as adiverter resistance. Another method used in traction consists of starting up two motors in series and then connecting them in parallel when a certain speed has been reached. Series resistances ...
An improved system for starting and changing speeds of motors of motorcycles and similar vehicles, characterized essentially by the fact of comprising a single lever which already serves to start the engine already for the change or selection of speeds, for which purpose, the core of this lever ...
T. Feb. 5. Cut-outs; switches.-Relates to switches for controlling motors. The main and rheostat switches are electricall... AH Adams,JT Mould 被引量: 0发表: 1903年 CONTROL SYSTEM FOR CONTROLLING OPERATION OF ELECTRIC CAR PURPOSE:To provide an arrangement which enables to impress a ...
parameterscancontroltwomotorswithdifferentpowerrespectively. 电源频率自适应Self-adaptionofpowerfrequency 电源频率50/60Hz自适应功能,方便用户使用。 Self-adaptionofpowerfrequency50/60makesusereasytouse. 动态故障记忆Dynamicfaultmemory 最多可以记录15次故障。便于查找故障原因。 Upto15failurescanberecorded,maki...
2 traditional starting method 2.1 stator series reactor starting For squirrel cage induction motors, the stator circuit series reactor is used to start the classification, and the wound rotor asynchronous motor adopts the rotor loop series reactor to start. Stator side series reactor starting, that ...
Yd2 Multi Speed Multi Poles 3 Phase AC Electric Induction Motor Yd2-132s-8/4 2.2/3.3kw US$500.00-4,000.00 / Piece Ybx3 Series Explosion-Proof Induction Motors IP55 Exd II Bt4 Ybx3-180L-4 22kw US$900.00-5,000.00 / Piece Yxvf IEC...
This is often not the case, and the assumption frequently results in the inadequate specification of motors. During starting and acceleration to operating speed, a motor must deliver a certain amount of kinetic energy to the rotating system. Since most motors are at least partially loaded during ...
Control for starting electric motors This invention concerns a control for starting an electric motor such as a three phase, a.c. drive motor in an elevator system. The motor is connected to a power source through reversible contactors and back-to- back SCRs. A speed contro... JW Kuhl -...