Tachogenerators are electromechanical devices which output a voltage proportional to their shaft speed. They are used to power tachometers and to measure the speed of motors, engines, and other rotational devices. A tachogenerator is commonly used to handle voltages between 0 and 10 volts and is classed as a precision instrument. We supply solid shaft, blind shaft and hollow shaft types of tachogenerator.
Solid shaft |
These tachogenerators are connected to a shaft which, in turn, is connected to an external rotational device. It is the rotation of the external device which turns the tachogenerator shaft and thus generating a very specific range of voltages in accordance with the speed and direction of the shaft. Tachogenerators can indicate rotational direction due to the fact that if a tachogenerator shaft is reversed, the output voltage polarity will change. The solid-shaft tachogenerator is best suited to high load applications. |
Hollow Shaft |
A Hollow-shaft tachogenerator differs internally from solid shaft tachogenerators in that they are designed with four magnetic poles rather than two. This design allows for the tachogenerator to work with lower voltage loads. An example of the use of a DC hollow shaft tachogenerator is to sense the speed of an elevator. The DC tachogenerator is installed in the hoisting equipment on the traction sheave that drives the cables. It enables the accurate control of cable speed to make sure that the lift stops at the right floor and does so smoothly. |
| Aerospae | Railway | Oil and Gas |
| Petrochemical | Utilities | Steel |
| Paper industry | Sugar Mills | Marine |
| Elevators | Escalators | Cableways | Rolling mills | Presses |
| Cranes and hoists | Rotor position | Mixers/Pumps | Conveyors | Compressors |
| Extruders | Paper/Pulp Mills | Motor Control | Assembly Systems | Speed Control |
| Steam Turbines | Fans and Blowers | Pump Drives | Air compressors | Turbine Generators |
| Steam & Gas Turbines | Hydro Power | Printing Equip | Automated Assembly | Bottling |