A resolver is a position sensor or transducer which measures the absolute angular position of the rotatingshaft to which it is attached. The operating principle of a resolver is similar to the operating principle of a synchro. Resolvers are typically built like small motors with a rotor (attached to the shaft whose position is to be measured) and a stator (stationary part) which takes the excitation signals and produces the output signals. A resolver typically consists of a primary winding, also called excitation winding and two secondary windings called cosine and sine windings. The secondary windings are geometrically placed such that winding signals are cosine and sine function of rotor angle.
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Features and Benefits
- Core Functionality :
- Measures the absolute angular position of a rotating shaft.
- Serves as an interface for a resolver, a type of position sensor.
- Signal Processing :
- Excitation Signal: Generates a configurable high-frequency square wave to excite the resolver's primary winding.
- Demodulation: Demodulates and filters the sine and cosine input signals from the resolver's secondary windings.
- Output Computation :
- Uses a Phase-Locked Loop (PLL) to compute the angle and speed from the demodulated sine and cosine signals.
Licensing Options
Encrypted RTL free with any Libero license
Documentation
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| Resolver Interface User Guide | Download |