Minebea Mitsumi Inc.

Minebea Company, Limited

Hiroyuki Kaidu

Masato Aoki

Xiao Zhou

Mitsunari Terada

Youhei Serizawa

Takahiro Suzuki

Yuji Omura

Takamichi Kitano

Wataru Nogamida

Satoshi Masuo

Tomotaka Sakuma

Yoshihisa Okabuchi

Shinichi Uchikawa

Zhou Xiao

Toshihiro Tamitsuji

Tomoyuki Suzuki

Takahiro Asami

Syu Hayashi

Shunsuke Harigae

Kouji Kebukawa

In a motor drive control device including a machine learning function, appropriate motor drive control in accordance with the usage environment of a motor is realized. A motor drive control deviceincludes: a measurement data generation unitthat generates measurement datarelating to operation of a motor; a training data generation unitthat attaches predetermined identification information indicating the operation state of the motorto the measurement dataand generates training data; a machine learning unitthat generates a learned modelfor determining the operation state of the motorby performing machine learning using the training data; and a monitor control unitthat monitors the operation state of the motorusing the learned model. In the motor drive control device, the training data generation unitstarts generation of the training datawhen the training data generation unitreceives a command ordering acquisition of the training datafrom a host device

Motor drive control device, motor drive control system, and motor drive control method

A fan includes a first blower and a second blower each having an impeller. The first blower includes a first motor and a first motor drive controller to control driving of the first motor and communicate with the second blower. The second blower includes a second motor and a second motor drive controller to control driving of the second motor and communicate with the first blower. The first motor drive controller controls the driving of the first motor based on a result of communication with the second blower.

Blower device

A motor drive control device_includes a target point determination unit_determining a target point P of zero crossing of a coil current Iu of a U phase based on a position detection signal Shu, a current zero crossing point estimation unit_estimating a zero crossing point Q of the coil current Iu of the U phase by detecting a change in a current direction of the coil current Iu of the U phase at a predetermined timing in every cycle of a PWM signal, an adjustment instruction signal generation unit_generating at least one of a phase adjustment instruction signal Sp for instructing phase adjustment of the coil current Iu and a frequency adjustment instruction signal Sf for instructing frequency adjustment of the PWM signal according to a phase difference Δφ between the target point P and the zero crossing point Q such that the phase difference is within a predetermined range, and a drive control signal generation unit_generating a drive control signal Sd based on at least one of the phase adjustment instruction signal Sp and the frequency adjustment instruction signal Sf.

Motor drive control device, motor unit, and motor drive control method

A motor drive control device includes: a feedback control unit calculating an operation amount (Sad) of a motor such that a rotation speed Sof the motor matches a target rotation speed S; a drive control signal generation unit generating a drive control signal Sd based on the operation amount Sad; a current fluctuation detection unit detecting a fluctuation of a current flowing through the motor; a correction instruction unit instructing correction of the operation amount Sad when the fluctuation of the current flowing through the motor is detected by the current fluctuation detection unit; and a correction unit correcting the operation amount Sad and providing the corrected operation amount Sto the drive control signal generation unit when the correction of the operation amount Sad is instructed from the correction instruction unit.

The present disclosure provides a motor control circuit enabled to change or adjust functions to be implemented to suppress an increase in cycle time during mass production. A motor control circuit according to an exemplary embodiment of the present disclosure is a motor control circuit to control a motor driver including a first non-volatile memory and a second non-volatile memory, and the first non-volatile memory stores a control algorithm and a first parameter group to be used by the control algorithm of the motor control circuit, and the second non-volatile memory is enabled to store a second parameter group to be used by the control algorithm.

Motor control circuit, motor drive control apparatus and control method for motor control circuit

The degree of flexibility of a speed curve for a target rotational speed of a motor is to be increased. A motor control circuitmeasures a duty cycle of an input speed command signal Sc indicating a target rotational speed of a motorto be driven, sets an inflection point In for each duty cycle obtained by equally dividing a possible duty cycle range assumed by the speed command signal Sc based on resolution informationindicating a resolution of the duty cycle of the speed command signal Sc, calculates a rotational speed corresponding to the measured duty cycle of the speed command signal Sc based on rotational speed informationindicating rotational speeds at the inflection points In on a speed curve and the set inflection points In, and determines the calculated rotational speed as the target rotational speed.

Motor control circuit, motor drive control device, and motor unit

A motor drive control apparatus includes a receiving unit configured to receive a target rotation frequency outputted to a motor to be a drive control target of a predetermined plurality of motors from a host apparatus and receive stability information indicating that actual rotation frequencies of the predetermined plurality of motors are stabilized, an advance angle/duty determination unit configured to adjust a drive control signal to control driving of the motor to be a drive control target so that a motor current becomes minimum at the target rotation frequency when the stability information is received, a duty setting unit, an advance angle control unit, a energization controlling unit and a motor drive unit configured to drive the motor to be the drive control target based on the drive control signal.

Motor drive control apparatus, motor drive system, and method for controlling motor drive control apparatus

A motor driving control device includes a motor driving unit, a position detection unit, a current detection unit and a control unit. The control unit includes a change detecting means configured to detect a predetermined phase change in the position signal, a first switching means configured to sequentially switch energization patterns of the coils with the plurality of phases based on a timing when the phase change is detected, and a second switching means configured to, in a state where the change detecting means does not detect the phase change, when a value of the drive current becomes a predetermined first threshold or more during a monitoring time period after a timing when the predetermined phase change in the position signal is expected, perform an operation to forcibly switch to a next energization pattern regardless of the timing of switching the energization pattern by the first switching means.

Motor driving control device and motor driving control method

Provided is a motor drive controller capable of a locking energization operation while preventing increase in temperature of a coil. The motor drive controller includes a motor drive section selectively energizing coils with a plurality of phases of a motor and a locking energization control section. The locking energization control section performs a locking energization operation when the motor is started or restarted and holds a rotor of the motor in a position corresponding to the coil in which the lock current flows. In case of performing the locking energization operation, the locking energization control section switches a locking energization pattern for applying the lock current in the coil from a locking energization pattern when the preceding locking energization operation was performed. The locking energization control section controls the motor drive section so that the lock current flows in the coil in accordance with the switched locking energization pattern.

Motor drive controller and motor drive control method

An abnormality determination device has a detection unit configured to detect a change in a phase of a position signal, the phase of the position signal changing depending on a rotation of a rotor of a motor, a time measurement unit configured to measure a time depending on a detection timing of the detection of the change in the phase of the position signal, a comparison unit configured to compare a first time measured by the time measurement unit with a second time measured before the first time is measured, and a determination unit configured to determine that a drive state of the motor is abnormal based on a comparison result of the comparison of the first time with the second time.

Abnormality determination device, motor device, abnormality determination method, and drive control method of motor

A motor drive control device capable of reducing the occurrence of vibration in a simple circuit configuration is provided. The motor drive control device () includes a motor drive unit () that selectively energizes coils with a plurality of phases (Lu, Lv and Lw) of a motor () and a control circuit () that outputs a drive control signal (Sd) which is a PWM signal to the motor drive unit () and thereby controls driving of the motor () while switching energization phases of the coils with the plurality of phases (Lu, Lv and Lw) energized by the motor drive unit () in predetermined order. The control circuit () executes reduction control to temporarily reduce a duty ratio of the drive control signal (Sd) every time a period of 1/m (m is an integer of 2 or more) of a switching cycle of the energization phases elapses after switching the energization phases.

Motor drive control device and motor drive control method

A motor driving control device has a motor driving unit configured to selectively energize coils with a plurality of phases of a motor, a control circuit unit configured to control an operation of the motor driving unit by outputting a driving control signal to the motor driving unit, and a position detector configured to output a position signal which corresponds to any one phase of the plurality of phases and a phase of which changes depending on a position of a rotor of the motor. the control circuit unit detects a transition of values of a back electromotive force induced in the one phase in a detection period corresponding to a change timing of the position signal when beginning to start up the motor, and determines a rotational state of the motor including a rotational direction of the motor based on a detection result of the transition of the values of the back electromotive force.

According to an aspect of the present disclosure, a motor drive control device driving a motor using position information detected by one sensor includes: a current detection unit detecting a magnitude of a coil current flowing through a coil of the motor; a rotation position detection unit detecting a rotation position of the motor based on the position information; and a hunting determination unit determining, based on the magnitude of the coil current, the rotation position of the motor, and a driving command for driving the motor, whether or not the motor is in a hunting condition.

A motor driving system has a first motor, a first motor driving control device for driving the first motor, a second motor, a second motor driving control device for driving the second motor, a controller performing communication with the first motor driving control device and the second motor driving control device, a first communication line for connecting a common terminal of the controller and the first motor driving control device; a second communication line for connecting the common terminal and the second motor driving control device, and a switch unit capable of switching each of the first and second communication lines between an enable state in which communication is possible by the communication line and an disable state in which communication is impossible under control of the controller. The controller controls the switch unit to set either the first or the second communication line to the enable state.

Growing community of inventors

Iwata, Japan

Hiroyuki Kaidu