Abstract:
Verfahren (120) zur Korrektur von Messabweichungen eines Sinus-Cosinus-Rotationssensors (100) zur Ermittlung einer Drehzahl und/oder einer Winkelposition eines um eine Drehachse drehenden Bauteils (106), wobei statische Messabweichungen des Sinus-Cosinus-Rotationssensors (100) durch eine statische Korrektur (124) kompensiert werden, dadurch gekennzeichnet, dass zusätzlich eine dynamische Korrektur (122) erfolgt.
Abstract:
The present invention relates to a rotor (2) alignment method which enables the rotor (2) to be aligned with the A phase axis for Permanent Magnet Synchronous Motors (PMSM) (1) using incremental angle encoder, and which comprises the steps of giving rotor axial reference current (Idref) to the stator (3) reels such that it will generate magnetic field in A phase axis of the stator (3) by accepting the rotor angle (Θ) as 0, an incremental angle encoder measuring the speed of the rotor (2) continuously or in selected time intervals, a speed controller decreasing the rotor axial reference current (Idref) when the rotor (2) speed measured by the incremental angle encoder exceeds a selected rotor (2) speed, and increasing the rotor axial reference current (Idref) when the rotor (2) speed measured by the incremental angle encoder decreases below a selected rotor (2) speed, stopping the rotor axial reference current (Idref) when the rotor axial reference current (Idref) comes to a selected highest rotor axial reference current (Idref) value.
Abstract:
A divided phase windings circuit includes divided phase windings, a power switch circuit comprising at least one power switch and direct current (DC) supply circuit at a midpoint of divided motor phase windings, and non-collapsing DC power supply component to prevent power supply from collapsing when at least one switch is on and conducting. The non-collapsing DC power supply component may include one or more tap from motor divided phase windings electrically connected to power supply, a secondary phase coil winding connected to power supply to power the power supply, one or more resistors and one or more Zener diodes between the divided phase windings and power switch circuit, and/or electrical component to create a voltage drop between motor divided phase windings and power switch circuit to prevent power supply from collapsing when at least one power switch in the power switch circuit is on and conducting.
Abstract:
Motor control circuits and associated methods to control an electric motor provide a plurality of drive signal channels at the same phase, resulting in reduced jitter in the rotational speed of the electric motor.