Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details

HELECTRICITY H02Electric power H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

H02P25/00Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details

H02P25/02characterised by the kind of motor H02P25/022Synchronous motors H02P25/024controlled by supply frequency H02P25/026thereby detecting the rotor position H02P25/028with four quadrant control H02P25/03with brushless excitation H02P25/032Reciprocating, oscillating or vibrating motors H02P25/034Voice coil motors H02P25/04Single phase motors H02P25/06Linear motors H02P25/062of the induction type H02P25/064of the synchronous type H02P25/066of the stepping type H02P25/08Reluctance motors H02P25/0805whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value H02P25/083Arrangements for increasing the switching speed from one coil to the next one H02P25/086Commutation H02P25/089Sensorless control H02P25/092Converters specially adapted for controlling reluctance motors H02P25/0925wherein the converter comprises only one switch per phase H02P25/098Arrangements for reducing torque ripple H02P25/10Commutator motors H02P25/102Repulsion motors H02P25/105Four quadrant control H02P25/107Polyphase or monophase commutator motors H02P25/12with shiftable brushes H02P25/14Universal motors H02P25/145whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value, speed feedback H02P25/16characterised by the circuit arrangement or by the kind of wiring H02P25/18with arrangements for switching the windings H02P25/182whereby the speed is regulated by using centrifucal devices H02P25/184wherein the motor speed is changed by switching from a delta to a star H02P25/186whereby the speed is regulated by using a periodic interrupter H02P25/188wherein the motor windings are switched from series to parallel or vice-versa to control speed or torque H02P25/20for pole-changing H02P25/22Multiple windings Windings for more than three phases H02P25/24Variable impedance in stator or rotor circuit H02P25/26with arrangements for controlling secondary impedance H02P25/28using magnetic devices with controllable degree of saturation H02P25/30the motor being controlled by a control effected upon an ac generator supplying it H02P25/32using discharge tubes H02P25/325whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value