Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Holdings Corporation

Masaru Nishizono

Toru Tazawa

Hiroshi Fujiwara

Kenichi Suzuki

Yu-suke Imada

Tomokuni Iijima

Kazushige Narazaki

Ichiro Oyama

Ken'ichi Suzuki

Yoshiaki Ikeuchi

Yusuke Imada

Yuya Sakamoto

Tomohisa Hirakawa

A method, according to the present invention, of adjusting control parameters used in a control apparatus of an electric motor includes the steps of: computing a first frequency characteristic (Step 1); computing a present speed-proportional gain range (Step 2); computing a present mechanical-system characteristic constant (Step 3); computing a present proportional gain range (Step 4); computing a secular characteristic (Step 5); computing a secular speed-proportional gain range (Step 6); computing a secular proportional gain range (Step 7); and selecting proportional gain values (Step 8).

Control apparatus of an electric motor

In a customization method of a motor control device, a customization module for executing a modifying operation of a specific function in a customizing element is formed. A customization module group is configured by a set of customization modules. The user can form a user module for executing an operation related to the specific function in the customizing element. A buffer memory accessible from both the customization module and the user module is provided. The customization module is configured to execute the operation related to the specific function based on data received from the user module via the buffer memory.

Customization method of motor control device and motor control device

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.

Motor driving apparatus

A method, according to the present invention, of adjusting control parameters used in a control apparatus of an electric motor includes the steps of: computing a first frequency characteristic (Step); computing a present speed-proportional gain range (Step); computing a present mechanical-system characteristic constant (Step); computing a present proportional gain range (Step); computing a secular characteristic (Step); computing a secular speed-proportional gain range (Step); computing a secular proportional gain range (Step); and selecting proportional gain values (Step).

Motor drive device () according to the present invention includes operation pattern generator (), position and speed controller (), load characteristic compensator (), and load characteristic measurement unit (). Operation pattern generator () increases an absolute value of acceleration, at which a motor speed or a motor position is changed, in each operation pattern. Load characteristic measurement unit () measures the load characteristic to set load characteristic compensator () when torque command indicator is less than or equal to a torque limit value. Load characteristic measurement unit () ends the measurement of the load characteristic without setting load characteristic compensator () when the torque command indicator is greater than the torque limit value.

Motor drive device

A motor drive device () of the present invention includes a command response setting unit (), a position and speed controller (), a load characteristic compensator (), a servo adjuster (), a command response setting function (), a stiffness setting function (), an evaluation indicator measuring function (), and a storage (). The servo adjuster () stores a plurality of command response indicators () and a plurality of stiffness indicators (). The servo adjuster () also generates an evaluation indicator measuring pattern () by a combination of each command response indicator () and each stiffness indicator (). A motor () is driven in accordance with the generated evaluation indicator measuring pattern () while the command response indicators () and the stiffness indicators () are sequentially changed.

A method for calculating a motor constant of a permanent magnet type synchronous motor according to the present invention includes: a voltage applying step of applying a voltage obtained by compositing a DC component and an AC component to a permanent magnet type synchronous motor while varying a frequency of the AC component; a current detecting step of detecting a motor current flowing according to the applied voltage; a phase difference calculating step of calculating a difference in phase between the AC component of the applied voltage and an AC component of the motor current; and a motor constant calculating step of calculating a motor constant of the permanent magnet type synchronous motor. In addition, in the motor constant calculating step, the motor constant is calculated based on the applied voltage and the motor current when the difference in phase becomes nearly 45 degrees.

Method for calculating motor constant of permanent magnet type synchronous motor and motor constant calculating device

The present invention includes a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor, a motor current detecting step of detecting a motor current flowing depending on the applied voltage, and a current control gain adjusting step of calculating a current control gain based on frequency characteristics of the applied voltage and the motor current. In this manner, a stable current control gain having a high current response can be adjusted within a short period of time.

Current control gain adjusting method for PM motor, current control method, and control device

A motor constant calculating method for a PM motor according to the present invention includes a voltage applying step of applying an applied voltage including a DC component and a plurality of frequency components to a PM motor, a motor current detecting step of detecting a motor current flowing depending on the applied voltage applied in the voltage applying step, and a motor constant calculating step of calculating a motor constant of the PM motor based on the applied voltage and the motor current.

Motor constant calculating method for PM motor, and motor constant calculating device

There are provided: a plurality of notch filters which are arranged inside a control system for feedback-controlling a moving operation of a moving section of a motor and attenuate signal components having near frequencies with a notch frequency at a center in an input signal; a plurality of oscillation extracting filters which are set with different frequency bands as being corresponded to the respective notch filters and extract oscillating components in the set frequency bands from a speed detection signal; and a plurality of notch controlling sections which are arranged with respect to the respective oscillation extracting filters and control the notch frequencies of the corresponding notch filters so as to decrease amplitudes of the oscillating components extracted by the oscillation extracting filters.

Motor controller

An apparatus and method for controlling an electric motor is disclosed. The apparatus includes an instruction inputting section for transmitting an instruction for an electric motor or a control object coupled to said electric motor and a prefilter section for outputting a follow-up instruction value by acting on the instruction. The prefilter section has a prefilter concurrently having characteristics of lowered gain at a prescribed frequency and frequencies in the vicinity thereof, and characteristics of limiting the gain in a high range. An instruction follow-up controlling section provides a controlling instruction follow-up so that a quantity of a state of said electric motor or control object follows the follow-up instruction value.

Growing community of inventors

Osaka, Japan

Masaru Nishizono