摘要:
Die Erfindung betrifft eine Antriebsvorrichtung (100) zur Verwendung in einer Laborvorrichtung, mit einem Schrittmotor (10) mit Rotor und Stator, und mit einer Motorsteuerung (20), die dazu ausgelegt ist den Schrittmotor (10) anzusteuern. Die Antriebsvorrichtung (100) umfasst in einer Ausführungsform einen Encoder (11), der im Betrieb jeweils ein aktuelles Encodersignal (e(t)) liefert, das die aktuelle Rotorposition des Rotors wiedergibt, und Phasenanschlüsse (14, 27), um die aktuell fliessenden Motor-Phasenströme (ia, ib) abzugreifen. Die Motorsteuerung (20) umfasst ein Transformationsmodul (13), um die aktuell fliessenden Motor-Phasenströme (ia, ib) mittels eines Transformationsverfahrens in einen Schlupfanteil (ix) und einen Drehmomentanteil (iy) zu zerlegen. Sie umfasst weiterhin ein Schlupfregelmodul (15), dem als Eingangsgrössen der Schlupfanteil (ix) und ein erster Sollwert (ix*) zur Verfügung gestellt werden, und ein Drehmomentregelmodul (16), dem als Eingangsgrössen der Drehmomentanteil (iy) und ein zweiter Sollwert (iy*) zur Verfügung gestellt werden. Das Schlupfregelmodul (15) und das Drehmomentregelmodul (16) geben die Rotor-Phasenströme (ia, ib) so vor, dass die Differenz zwischen dem Schlupfanteil (ix) und dem ersten Sollwert (ix*) und die Differenz zwischen dem Drehmomentanteil (iy) und dem zweiten Sollwert (iy*) minimal sind.
摘要:
A DC voltage value from a DC voltage detection section (201) is input directly to a voltage correction section (202) without passing through a compensator or a filter. Therefore, even when rapid voltage change occurs, such as short power interruptions, instantaneous voltage drop and return from instantaneous voltage drop, the voltage correction section (202) can quickly perform the correction operation in response to the rapid voltage change. Since the amount of link resonance compensation is limited by the limitation section (212) to a certain range, it is possible to prevent the amount of link resonance compensation from fluctuating excessively upon rapid voltage change. Since the amount of link resonance compensation which is limited by the limitation section (212) to a certain range is input to one compensator (206) that has an appropriate control band, among all control calculation sections (204-208), the response does not have to be unnecessarily fast, thus realizing a stable control.
摘要:
A motor control device includes: a motor-current detection unit (11, 17); a rotational-angular-speed calculation unit (22) for calculating a rotational angular speed of a motor; a rotational-angle-change-amount calculation unit (50) for multiplying the rotational angular speed by a predetermined time so as to calculate a motor-rotational-angle change amount within a predetermined time; a basic-drive-value calculation unit (51a, 52a) for calculating a basic drive value for driving the motor; a correction-value calculation unit (51b, 52b) for calculating a correction value for correcting the basic drive value based on the motor current and the motor-rotational-angle change amount; a correction unit (51c, 52c) for evaluating the motor drive value by correcting the basic drive value by the correction value; and a drive unit (20, 21, 13) for driving the motor by using the motor drive value evaluated by the correction unit.
摘要:
A controller of an electric motor (3) for improving operation efficiency in performing electric conducting control of the electric motor (3) of an axial air-gap type is provided. Therefore, the controller of the electric motor (3) of the axial air-gap type including a rotor (11) having a permanent magnet, a first stator (12a) and a second stator (12b) oppositely arranged through the rotor (11) in a rotation axis direction of the rotor (11), and armature windings (13a, 13b) mounted to the first stator (12a) and the second stator (12b) has an electric current command determining section (30) for switching between a both-side stator driving mode for conducting a driving electric current to both the armature winding (13a) of the first stator (12a) and the armature winding (13b) of the second stator (12b), and a one-side stator driving mode for conducting the driving electric current to only the armature winding (13a) of the first stator (12a) in accordance with a request value Tr_c of output torque of the electric motor (3).
摘要:
A controller (8) able to efficiently operate an electric motor (3) of an axial air-gap type as an electric motor (3) and an electricity generator is provided. The controller (8) of the electric motor (3) of the axial air-gap type has a rotor (11) having a permanent magnet, and a first stator (12a) and a second stator (12b) oppositely arranged through the rotor (11) in a rotation axis direction of the rotor (11); wherein the controller (8) includes a first electric current command determining section (30) for supplying a driving electric current from a first power source (38a) to an armature winding (13a) of the first stator (12a), and rotating the rotor (11); a first electric current control section (40a); a second electric current command determining section (37) for charging a second power source (39) by electric power generated in an armature winding (13b) of the second stator (12b) when the rotor (11) is rotated by the supply of the driving electric current to the armature winding (13a) of the first stator (12a); and a second electric current control section (40b).
摘要:
Actual instantaneous reactive power value Q is calculated from a voltage applied to a synchronous motor and a current detected value. Instantaneous reactive power estimated value Qhat is calculated from inverter output angular frequency ω1 and a current detected value. Inverter output angular frequency ω1 is controlled to minimize the difference (ΔQ) between Q and Qhat. This difference (ΔQ) contains a component proportional to position error Δθ of the synchronous motor and a component proportional to its rate of change (dΔθ/dt) independently of winding resistances. A frequency control system is provided to minimize this difference down to zero. This frequency control system has accomplished a high-accuracy sensor-less control. The instantaneous reactive power can be substituted by any value which contains a position error (Δθ) function and can be calculated without using winding resistances.
摘要:
A control system for an electric motor comprises a controller which receives as an input a demanded motor current and produces at an output an intermediate voltage demand signal, a voltage demand signal correction means arranged to generate a voltage demand correction signal, and a combining means arranged to combine the intermediate voltage demand signal and the voltage demand correction signal to produce an actual voltage demand signal that is applied to the motor by pulse width modulation of the switches of a motor bridge driver. The correction signal compensates for unwanted non-linearities caused by interlock delays in the switching of the motor bridge switches.