DC tachogenerator TG-2344 series

AC

・Compact, high performance and high reliability ・Minimal ripples in output voltage ・Superior in linearity Output Waveforms for Tachometer Generator This product uses Samarium-based rare earth magnet for field magnetic flux source and it keeps to generate high magnetic flux constantly and stably. The coil generates altemating current (AC) by driving MovingCoil-type Roter but since the commutator rectifies the voltage and outputs it by converting to direct current (DC) through a brush, output waveforms would be as shown in [Drawing-A] ideally. However, because of the effect by reactance voltage of rotor's inductance, contact resistance of the brush, and field magnetic fux distribution range, actual waveforms will be as shown in the picture left. Abnormal Waveforms The normal waveforms of DC output voltage should be as shown in [Diagram-A] ideally. However, the actual waveformes would be collapsed when brushes pass through insulating parts on the commutator and therefore contact state would be changed momentarily as shown in the picture left in middle. In an extreme case, the waveforms would be abnormal as shown in (Diagram-BJ by brushes contact failure. It is possible to reduce those abnormal waveforms by making the outputs pass through the filter and espacially it is important to reduce them to utmost limit if using our product to a controlling application with fast response. The brushes and commutator of this product are very stable, have tow contact resistance, and excellent abration resistance. By combining with the excellent characteristics of Moving Coil Type, this will make control stable no matter how long it operates.