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ServoTek tachometer designed for monitoring DC motors

14 Nov 2013

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The TachSyn Series of brushless DC tachometer/commutator from ServoTek Products may serve as a brushless DC tachometer or brushless DC motor commutator for tracking the rotational speed of brushless industrial DC motors. The company said the product presents as an economical solution to various velocity-loop problems relating to brushless or standard servo.

The robust design of the ServoTek Products TachSyn transducer consists of a primary magnetic sensing device, in which output windings, field winding, and a permanent magnet are all co-located within the stator itself, maximising reliability. The transducers are available in several unique models to commutate 4-, 6-, or 8-pole brushless DC motors. Any sized TachSyn tachometer may be specified in applications where a simple DC tachometer signal is the only requirement. Pancake-shaped TachSyn transducers are easily mounted, cantilever- style, to the back of a motor or other device, with synchro-type adjustment for phasing.

Each TachSyn transducer requires one CT-4 Series circuit board (or a customer-supplied equivalent), as well as a connecting cable with double-barreled shield to complete signal conditioning. The CT-4 circuit board provides AC field excitation for the transducer and conditioning for its output signals, which include a linear low-ripple DC tachometer voltage, and either a Hall-equivalent or sine-wave commutation signal.




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