Posted on Dec 3, 2012

This high-performance switching controller for a low-power de servo motor uses a symmetrical complementary- transistor bridge. The bridge acts as a reversing switch between the motor and a single-ended power supply. Since the transistors operate either fully on or completely off, except during a very short transition period, much less heat is dissipated than in linear-amplifier circuits. Damping is provided by the circuit`s inherent dynamic braking.

Click here to download the full size of the above Circuit.

Since either maximum or zero voltage is applied to the motor, the dynamic response is faster than that of linear servo drives.

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