By measuring the voltage produced by a tachogenerator , you can easily determine the rotational speed of whatever its mechanically attached to. Obviously, since a tachogenerator cannot produce voltage when its not turning, the zero . The WEG tachogenerators have been designed for applica- tions on servocontrol operating machines, driving of textile machines, accelerators, braking of elevators, control and regu- lation of fine adjustments which depend on speed variation and other applications that require continuous and closely. A tachogenerator gauges the speed of rotation of a shaft or disk (from Greek: tachos = spee metron = measure) as in a motor or other machine.

The device usually displays the rate of revolutions per minute (rpm) on a calibrated analogue dial. Tachogenerator Voltage and Speed.

Two of the most commonly used tachogenerators , a dc and an ac tachogenerator , are shown in Fig. AC supply AC supply (b) Fig. Schematic diagram of (a) a dc, . A tachometer consists of tachogenerator (a sensor on the rotating shaft), and an electronic circuit that displays the sensed input.

The tachogenerator might generate either analog voltage proportional to RPM (analog tachos), or square . DC tachogenerator A dc tachogenerator is a separately excited machine. Sometimes, the permanent magnet is also used. The demerit of the permanent magnetic field is that it deteriorates with aging, mechanical jolts, and shocks.

If magnetic materials such as Alnico, Magnico are use the aging can be avoided to a great . The measurement of speed can be done with the help of tachogenerator. Electrical type tachogenerators. Mechanical type of tachogenerators. But electrical type tachogenerators are preferred over mechanical type tachogenerators as the electrical transducers are always . We also supply Radio Energie encoders, dc motors an. A tachogenerator is an electromechanical device which produces an output voltage that is proportional to its shaft speed.

It comprises a stator (nonrotating part) with a permanent-magnet fiel a rotating armature circuit, and a commutator and brush assembly . An AC tachogenerator is a modified version of an induction motor (Figure 19). The rotor surface is cylindrical. The stator inner surface is also cylindrical.

The air gap is minimal – of the order of 0. Both – stator as well as rotor – are assembled using special (Silicon) steel-stampings. In addition, the rotor carries a.