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US 2026/0213684 A1Published application
Method for determining and/or calculating a rotational speed and an angle in sensorless drives, as well as a computer program and a device
AssigneeSchaeffler Technologies AG & Co. KG
InventorsErhard Hodrus, Christian Eberle
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for determining a rotational speed and a rotor positional angle in sensorless drives, preferably in a sensorless operation of a permanently excited synchronous machine, wherein the calculation is based on a first voltage error (Δ_ud_1′) and a second voltage error (Δ_ud_2′) from an angle variation in ud, and based on a first voltage error (Δ_uq_1′) and a second voltage error (Δ_uq_2′) from a rotor speed variation in uq. The invention also relates to a computer program and a a control device.
Claims20
A method comprising:
- determining a rotational speed (Omega) of a rotor and a positional angle of the rotor (Gamma) based on a first voltage error (Δ_ud_1′) and a second voltage error (Δ_ud_2′) from an angle variation in ud and based on a first voltage error (Δu_q_1′) and a second voltage error (Δ_uq_2′) from a rotor speed variation in uq.
A method comprising:
- determining, during operation of a permanently excited synchronous machine, a rotational speed of a rotor and a positional angle of the rotor based on a first voltage error and a second voltage error from an angle variation and based on a first voltage error and a second voltage error from a rotor speed variation.
A control unit comprising:
- memory, wherein the memory is configured to maintain a computer program configured to determine, during operation of a permanently excited synchronous machine, a rotational speed of a rotor and a positional angle of the rotor based on a first voltage error and a second voltage error from an angle variation and based on a first voltage error and a second voltage error from a rotor speed variation.
Dependencies are inferred from the claim text.