Mitsubishi Electric Corporation

Yosuke Hachiya

Masato Ito

Satoru Terashima

Kunihiro Kawahara

Tetsuya Kojima

Hisanori Yamasaki

Akira Satake

Shoji Adachi

Akihiro Maruyama

In sensorless control for a rotary machine, when variations in inductances for U, V, W phases due to manufacturing error are great, imbalance occurs among detected currents for the respective phases. Thus, estimation error of a magnetic pole position of a rotor increases, so that positioning accuracy is reduced. Correction filters for imparting gains in accordance with rotary machine constants for the respective phases are provided to control means or magnetic pole position calculation means, thereby correcting the imbalance occurring among the detected currents for the respective phases.

Control device for AC rotary machine and control method for AC rotary machine

A machine learning device includes: a state observer that observes, as a state variable, at least one of driving noise of a synchronous rotating machine and an error with respect to a preset position of a rotational position of the synchronous rotating machine determined by driving voltage; and a learner that determines a value of a parameter on a basis of the state variable observed by the state observer. The learner includes: a reward calculator that calculates a reward on a basis of the state variable; and a function updater that determines the value of the parameter on a basis of the reward that has been calculated. The reward calculator increases the reward when the driving noise is smaller than a target value of driving noise.

Synchronous rotating machine control device and machine learning device

A control device for an AC rotating machine includes: a current detection unit; a command generation unit for generating a voltage command, using a moment of inertia J; a speed estimation unit for calculating an estimated speed &#x3c9;0 on the basis of the voltage command and detected current; an output torque computing unit for calculating output torque on the basis of the detected current; and an inertia moment computing unit for calculating the moment of inertia J. The output torque computing unit gives a delay characteristic corresponding to an estimation delay of the estimated speed &#x3c9;0, to the output torque, and the inertia moment computing unit calculates the moment of inertia J on the basis of the estimated speed &#x3c9;0 and the output torque having the delay characteristic.

Control device for AC rotating machine

A control device for an AC rotary machine includes a magnetic-pole-position correction amount calculation device that calculates a magnetic-pole-position correction amount based on a detection-current vector detected when a voltage application device applies a voltage to the AC rotary machine according to a voltage command and on the voltage command, and stores in a storage device the magnetic-pole-position correction amount as it is associated with the detection-current vector. At normal operation of the AC rotary machine, a voltage-vector command generation device generates a voltage command for normal operation based on the detection-current vector detected by a current vector detection device and the magnetic-pole-position correction amount associated with the detection-current vector.

Control device for AC rotary machine and magnetic-pole-position correction amount calculation method

A control device for AC rotary machine includes a current vector detection section (), a magnetic flux vector detection section (), an adaptive observation section (), a control section (), a voltage application section (), a deviation vector calculation section () for outputting a current deviation vector and a magnetic flux deviation vector, and a deviation amplification section (). The adaptive observation section () calculates an estimated current vector, an estimated magnetic flux vector, and an estimated position, based on a voltage instruction vector and an amplified deviation vector. Further, the control section () superimposes a high-frequency voltage vector, and the magnetic flux vector detection section () calculates a detected magnetic flux vector, based on a magnitude of a high-frequency current vector having the same frequency component as the high-frequency voltage vector, included in a detected current vector, and on a magnitude of a rotor magnetic flux.

Control device for alternating current rotary machine

A control device for rotary machine includes: a voltage instruction generation section for generating a voltage instruction; a voltage application section for applying voltage to a rotary machine based on the voltage instruction; a current detection section for detecting rotary machine current of the rotary machine; and an inductance calculation section for calculating an inductance of the rotary machine from the voltage instruction and the rotary machine current. The voltage instruction generation section generates voltage instructions of constant DC voltages. The voltage application section applies voltages to the rotary machine based on the voltage instructions. The inductance calculation section calculates the inductance from a voltage instruction for measurement arbitrarily selected from the voltage instructions, and the rotary machine currents detected by the current detection section before and after application of the voltage instruction for measurement.

Control device for rotary machine and inductance measurement method for rotary machine

A control device of an AC rotating machine includes a controller receiving a current vector instruction and a detection current vector as inputs and outputs a voltage vector instruction to the AC rotating machine, an alternating current amplitude computation mechanism computing an alternating current amplitude of at least one of a parallel component and an orthogonal component with respect to the voltage vector instruction, an alternating current amplitude instruction generator generating an alternating current amplitude instruction from the current vector instruction, and a magnetic-pole position computation mechanism computing an estimated magnetic-pole position of the AC rotating machine. The magnetic-pole position computation mechanism computes the estimated magnetic-pole position so that the alternating current amplitude coincides with the alternating current amplitude instruction.

Growing community of inventors

Tokyo, Japan

Yosuke Hachiya