摘要:
The invention relates to a method for identifying an error state in a brushless direct current motor. For the purposes of this identification, an angle deviation between a shaft angle and a control angle is calculated and used to identify error states on the basis of characteristic patterns. This also works, in particular, for slowly-rotating or stationary brushless direct current motors and allows a clear reduction in the calculation capacities required, compared to the prior art.
摘要:
Bei einem Flurförderzeug mit zumindest einem elektrischen Antrieb einer Komponente des Flurförderzeugs (1), wobei der elektrische Antrieb einen Drehstrommotor (18) mit mindestens drei Statorwicklungen (26,29,32), die in dem Betrieb des Drehstrommotors (18) in Sternschaltung geschaltet und mindestens drei Phasen (25,28,31) zugeordnet sind, einen regelbaren Umrichter (17) für die Versorgung der Phasen (25,28,31) mit elektrischer Energie und eine Steuervorrichtung aufweist, ist ein Sternpunkt (34) der Statorwicklungen (26,29,32) mit einer Hilfs-Halbbrücke (33) verbunden und die Steuerung kann bei einem Ausfall oder Fehler in einer Phase (25,28,31) die verbleibenden Phasen (25,28,31) auch mithilfe der Hilfs-Halbbrücke (33) mit elektrischer Energie versorgen.
摘要:
A method for controlling and/or protecting an actuator of a piece of mobile equipment of a building, the actuator comprising a motor, comprises the steps consisting of: (E1) providing an instantaneous signal representative of the electrical power provided to the motor, (E2) carrying out a sampling of values of the instantaneous signal, (E3) performing a control of each sampled value according to a first protection criterion of the actuator, and issuing a first piece of anomaly information for each sampled value that does not satisfy the first criterion, (Ε3') acquiring a set of values from the sampled values, (Ε4') performing a control according to a second protection criterion of the actuator applied to all of the acquired sampled values, and issuing a second piece of anomaly information for all of the acquired sampled values that do not satisfy the second protection criterion.
摘要:
A microcomputer (an electric current command value calculating section) carries out field weakening control in which a d-axis electric current command value Id* is set to a negative value in correspondence with rotation angular velocity ω of a motor. The microcomputer determines whether an anomaly has occurred in an EPS. If it is determined that an anomaly is in a power supply system (step 202: YES), the microcomputer determines whether the anomaly in the power supply system is failure of electric current flow in any phase (step 203). If it is determined that electric current flow has failed in a certain phase, the microcomputer prohibits the field weakening control and outputs a motor control signal instructing to use two other phases free from the failure of electric current flow as electric current flowing phases (two phase drive mode, step 204).
摘要:
A method is proposed for adjusting an actuator (300) of a positioning system (100). The positioning system (100) has an electronically commutated actuator drive (200) which is coupled to the actuator (300), wherein the actuator drive (200) has a permanent magnetic rotor (210), wherein the rotor (210) has a first shaft (212) which extends along a pole axis (290) of the rotor (210). The actuator drive (200) additionally has an electronically commutated stator (230), wherein the stator (230) can be energized using a space phasor (260), wherein the space phasor (260) has an electric phase and an amplitude, wherein the space phasor (260) is aligned with respect to the first shaft (212) of the rotor (210) around a difference phasing. In order to be able to actuate a predefined position of the actuator, even without sensors to determine the position of the first shaft (212) of the rotor (210), the following steps of the method are thereby provided: setting the difference phasing of the space phasor (260) to an operating difference phasing; setting the amplitude to an operating amplitude, wherein the operating difference phasing and the operating amplitude are set in such a way that the operating difference phasing is less than 45º and that a torque is generated at the rotor (210) suitable for starting up the predefined position of the actuator (300). The invention further relates to a device for adjusting an actuator (300) of a positioning system (100) and a computer program product which contains a program code which, when it is executed by a data processing unit, implements the method according to the invention.
摘要:
A handheld AC power tool is provided. The power tool is comprised generally of: a brushless DC motor; a power cord connectable to an AC power socket; a converter circuit configured to receive input power from the power cord and operable to output a DC bus voltage, a switching arrangement interposed between the electric motor and the converter circuit; a motor drive circuit interfaced with the motor switches; and a power switch operable by a user to selectively energize the motor drive circuit and thereby power on the tool. The converter circuit includes a rectifier and a capacitor electrically coupled across the rectifier, such that the capacitor has capacitance sized to produce a DC bus voltage whose magnitude from an AC power source is substantially same as magnitude of voltage from a DC power source.
摘要:
L'invention concerne un système (SYS) de commande d'une machine électrique (ME) à stator et à rotor bobinés, comportant : - une première cartographie (CART1) de courants minimisant les pertes électriques dans la machine (ME), - une deuxième cartographie (CART2) de courants, minimisant les pertes électriques rotoriques, - une troisième cartographie (CART3) de courants minimisant les pertes électriques statoriques, - un moyen de sélection (MS) d'une cartographie en fonction des températures du rotor (Tr) et du stator (Ts), pour alimenter la machine électrique (ME), - un moyen de temporisation (MT) du moyen de sélection (MS), tant qu'une consigne de couple (T) reste au-dessus d'un seuil, - et un moyen de d'inhibition (MI) du moyen de temporisation (MT) au-delà d'une durée prédéterminée lorsque la nouvelle cartographie est la première cartographie (CART1).
摘要:
The present invention provides a method and a device for operating an electric machine for a soft changeover from a normal or free-wheel mode to an active short-circuit. To this end, a voltage with which the electric machine is actuated is first reduced in a defined manner to a predefined, preferably very low value and then the phase connections of the electric machine are short-circuited. Excessively high overcurrents, particularly overcurrents greater than the nominal current of the electric machine, can thus be avoided.
摘要:
A motor-driving apparatus, which drives a motor while controlling the motor based on an external command signal from an external device, includes an external command processor, a program storage, a motor controller, a program rewriting unit, a rewriting data input terminal. The external command processor outputs a motor control command from the external command signal based on an external command processing program. The motor controller controls an operation of the motor according to the motor control command based on a motor control program. Further, the external command processing program and the motor control program are previously stored in the program storage. The program rewriting unit rewrites only the external command processing program stored in the program storage based on the program rewriting data received from the rewriting data input terminal.