Method for estimating the rotor temperature of a permanent magnet synchronous electric machine during operation
By measuring internal control voltage and rotor speed during zero-torque operation and applying a correction factor, the method addresses the challenge of estimating rotor temperature in permanent magnet synchronous electric machines, achieving accurate temperature monitoring despite unit variations and environmental changes.
FR3160526A1Pending Publication Date: 2025-09-26VITESCO TECHNOLOGIES GMBH
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Patent Information
- Application Number
- FR2024002704
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-09-26
Abstract
The invention proposes a method for estimating the operating temperature (of the rotor of a permanent magnet synchronous electric machine consisting of E3) in a phase of use during which no torque is required: E31) determining an internal control voltage and measuring the rotational speed of the rotor; E32) calculating a corrected value of the internal control voltage equal to the quotient of said voltage by a correction factor (translating a ratio between an induced voltage measured at the end of manufacture and an induced voltage of a reference machine); and E33) estimating a value of the operating temperature of the rotor which is obtained, using a model, for the measured rotational speed and the corrected value of the internal control voltage. No figure.
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