Minebea Mitsumi Inc.

Tomotaka Sakuma

Masato Aoki

Takahiro Suzuki

Hiroyuki Kaidu

Yoshihisa Okabuchi

Takamichi Kitano

Masaaki Nishizawa

Masashi Muragi

A motor drive control device includes a control circuit generating a drive control signal, and a drive circuit driving a motor. The drive circuit includes a plurality of switching legs each including a high-side transistor and a low-side transistor connected in series between a power line and a ground potential, and pull-up resistors each connected between the power line and a control electrode of the low-side transistor. The control circuit performs brake control to generate a drive control signal for turning off the high-side transistor and periodically switching the low-side transistor, when detecting a power supply voltage to be lower than a threshold voltage.

Motor drive control device and motor unit

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

Included are a drive control signal generation unit configured to generate a drive control signal for a motor in accordance with a target rotation speed of the motor and a rotation speed of the motor calculated in response to a rotation position detection signal of the motor; a rotation speed signal generation unit configured to generate a rotation speed signal having a frequency corresponding to the rotation speed of the motor, in response to the rotation position detection signal of the motor; an abnormality determination processing unit configured to determine whether a condition value for abnormality determination of the motor has reached a predetermined threshold value, for each predetermined abnormality determination period, and generate an abnormality determination signal distinguishable from the rotation speed signal when the abnormality determination processing unit determines that the condition value has reached the predetermined threshold value; and a signal output unit configured to output the rotation speed signal generated by the rotation speed signal generation unit when the abnormality determination signal is not generated, and output the abnormality determination signal instead of the rotation speed signal when the abnormality determination signal is generated.

Motor control device, motor drive control device, motor device, and motor control program

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

To provide a motor drive control device capable of determining the rotational direction of a motor using a simple configuration with a reduced number of lead wires from position sensors, and a method for controlling the motor drive control device. A control circuit unit of a motor drive control device includes a first comparator configured to compare the magnitudes of a first positive Hall signal and a first negative Hall signal output from a first Hall element, thereby generating a first position detection signal; a second comparator configured to compare the magnitudes of a second negative Hall signal output from a second Hall element and the first negative Hall signal, thereby generating a second position detection signal; and a rotational direction determination unit configured to compare the transitions of the first position detection signal and the second position detection signal, thereby determining the rotational direction of a motor.

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Nagano, Japan

Tomotaka Sakuma