The rotor speed and position estimation are not reliable when the motor runs at low speeds. Hence, rotor speed and position information cannot be used to control the motor at start-up and low speeds in sensor-less mode. The motor must be started with a forced angle (open-loop angle) instead of an estimated angle. The open-loop angle, along with the current reference generation, is managed by the Open-Loop Manager.
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Features and Benefits
- Rotor Control at Low Speeds :
- Computes rotor speed and position when the motor is running at low speeds.
- Manages the open-loop angle and current reference generation for motor startup and low speeds.
- Transitions from open-loop speed to closed-loop speed based on the closed-loop status input.
- Operates in per unit, where 2^16 represents rated values
Licensing Options
Encrypted RTL free with any Libero license
Documentation
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| Open-Loop Manager User Guide | Download |