摘要:
An electronic magnetic bearing controller (14) for controlling the position of a rotor of an electrical machine (12) supported by an active magnetic bearing the position of which being measured by at least one inductive position sensor having an inductive coil (10), comprising an automatic reactive power compensation device (40) for automatically compensating the reactive power consumed by the inductive position sensor.
摘要:
An electronic magnetic bearing controller (14) for controlling the position of a rotor of an electrical machine (12) supported by an active magnetic bearing the position of which being measured by at least one inductive position sensor having an inductive coil (10), comprising an automatic reactive power compensation device (40) for automatically compensating the reactive power consumed by the inductive position sensor.
摘要:
Rotating machine vibration monitoring process for detecting degradations within a rotating machine comprising an output axle fitted with magnetic bearings, said magnetic bearings comprising at least a position sensor and at least a magnetic actuator, the process comprising the following steps: - defining (1) a set of excitations that does not destabilizes the rotating machine, - injecting (2) the set of excitations in the rotating machine through the magnetic actuators and measuring (3) the response of the rotating machine - checking (7) whether the response verifies at least one predefined criterium, - if it is not the case, adjusting (8) the properties of the set of excitations and resuming the process at the injection step, - if the response verifies the at least one criterium, determining (9) at least one condition indicator based on the response measured, - determining (10) if an alarm is to be triggered based on the condition indicator determined.
摘要:
A permanent magnet rotor shaft assembly (100) for a high speed electrical machine comprises a permanent magnet cylindrical core (101) having a longitudinal axis, the cylindrical core (101) being axially compressed by first and second end shafts (102A, 102B) and being radially compressed by a sleeve (104) made of a non-magnetic high strength metal. At least one (102A) of the first and second end shafts (102A, 102B) comprises, in its portion facing the cylindrical core (101), a central shoulder head (103A) which cooperates with a mating central recess (106A) made in a central portion of a front face of the cylindrical core (101). An easy concentric alignment of the first and second end shafts (102A, 102B) with the permanent magnet cylindrical core (101) is allowed while inserting the sleeve (104) and the stiffness of the assembled set is enhanced.
摘要:
A control device for controlling the position of a rotor (10A) supported by active magnetic bearings, comprising: a trajectory planning module (12) for generating a requested position, speed and acceleration. a feedback unit (20) for generating a position feedback value and a speed feedback value from measurements of at least a position of the rotor and current intensities in electromagnet coils of the active magnetic bearings, a first correction circuit (18) for generating a first command signal according to the difference between the requested position and speed and the position and speed feedback value respectively, a feedforward controller (14) for generating a second command signal according to a computation of the requested position, speed and acceleration, an adder (16) for adding the first and second command signals and delivering a third command signal for a non-linear inversion circuit (26) connected to the adder for generating flux command signals for the electromagnets, and a second correction circuit (28) for generating voltage command signals for the power amplifiers which control the current flowing in the electromagnet coils of the active magnetic bearings according to the difference between the flux command signals and feedback flux values.
摘要:
A compact electric centrifugal compressor particularly suitable for a heat ventilation air conditioning system for vehicles comprises a motor portion (20) and a centrifugal compressor portion (10) driven by the motor portion (20) through a shaft (15). The motor portion comprises first and second radial bearingless motors (140, 150). An active axial magnetic bearing or an axial bearingless motor (130) is located between the first and second radial bearingless motors (140, 150). The motor portion is further equipped with auxiliary landing bearings (8).
摘要:
A control device for controlling the position of a rotor (10A) supported by active magnetic bearings, comprising: a trajectory planning module (12) for generating a requested position, speed and acceleration. a feedback unit (20) for generating a position feedback value and a speed feedback value from measurements of at least a position of the rotor and current intensities in electromagnet coils of the active magnetic bearings, a first correction circuit (18) for generating a first command signal according to the difference between the requested position and speed and the position and speed feedback value respectively, a feedforward controller (14) for generating a second command signal according to a computation of the requested position, speed and acceleration, an adder (16) for adding the first and second command signals and delivering a third command signal for a non-linear inversion circuit (26) connected to the adder for generating flux command signals for the electromagnets, and a second correction circuit (28) for generating voltage command signals for the power amplifiers which control the current flowing in the electromagnet coils of the active magnetic bearings according to the difference between the flux command signals and feedback flux values.