Hitachi Astemo Ltd.

Mitsubishi Electric Corporation

Hitachi Automotive Systems, Ltd.

Mitsubishi Denki Kabushiki Kaisha

Hitachi, Ltd.

Takafumi Hara

Toshiyuki Ajima

Shigehisa Aoyagi

Katsuhiro Hoshino

Masaaki Taruya

Akihiro Ashida

Takaya Tsukagoshi

Hirokazu Matsui

Seizo Fujimoto

Shinsuke Asada

Kazuto Oyama

Mitsuo Sasaki

Yuji Kawano

Masaru Yamasaki

Hiroyuki Ota

Takumi Hisazumi

Takaki Sugino

Masaki Kashima

Yoshitaka Sugiyama

Midori Takaoka

Takeshi Yoshida

Kiyoshi Kuroda

Hiroyuki Saito

Hiroshi Kobayashi

Yoshitaka Iwaji

Takeshi Tokuyama

Noriyuki Maekawa

Masanori Watanabe

Masahiro Yokotani

Satoshi Wachi

Kenichiro Matsubara

Yoshinori Aoshima

Hideaki Tani

Makoto Ito

Akeshi Takahashi

Hiroshi Sakanoue

Shun Taniguchi

Hideki Shimauchi

Yosuke Tanabe

Takahiro Araki

Shinichi Hosomi

Yawara Kato

Shigeyuki Nonomura

Shohei Tsukamoto

Kyoshiro Itakura

Satoi Kobayashi

Masahiro Seo

Yuji Kawakami

Fusako Tomizumi

Taizou Miyazaki

Hideo Nagata

A motor control device connected to a power converter that performs power conversion from DC power to AC power and controls driving of an AC motor that is driven by using the AC power includes a voltage command generation unit that generates a three-phase voltage command; and a gate signal generation unit that performs pulse width modulation on the three-phase voltage command and generates a gate signal for controlling an operation of the power converter, in which the voltage command generation unit adjusts the three-phase voltage command by using a zero-phase voltage based on a power factor of the AC power in an overmodulation region in which a modulation factor according to a voltage amplitude ratio between the DC power and the AC power exceeds a predetermined threshold value, and the gate signal generation unit generates the gate signal by performing pulse width modulation on the adjusted three-phase voltage command.

Motor control device, electromechanical integrated unit, boost converter system, electric vehicle system, and motor control method

An inverter control device performs pulse width modulation by selecting one of a synchronous pulse control mode in which a frequency of a carrier wave used in the pulse width modulation is changed in accordance with a rotation speed of the motor and an asynchronous pulse control mode in which the frequency of the carrier wave is constant regardless of the rotation speed of the motor. At the time of switching from the asynchronous pulse control mode to the synchronous pulse control mode, the inverter control device changes a carrier reference phase that is a reference value of a phase of the carrier wave to a different value before and after the switching.

Inverter control device and inverter control method

A motor control device is connected to a power converter that performs power conversion from DC power to AC power and controls driving of an AC motor driven using the AC power, and the motor control device includes a carrier wave generation unit that generates a carrier wave, a carrier wave frequency adjustment unit that adjusts a frequency of the carrier wave, and a gate signal generation unit that performs pulse width modulation on a voltage command according to a torque command using the carrier wave and generates a gate signal for controlling an operation of the power converter, in which a phase difference between the voltage command and the carrier wave is randomly changed.

Motor control device, electro-mechanical integrated unit, hybrid system, and electric power steering system

A motor control device of the present invention is connected to a power converter for converting power from direct current power to alternating current power, and controls the drive of an alternating current motor that is driven using said alternating current power, and the motor control device is provided with: a carrier wave generator; a carrier wave frequency adjuster that adjusts the frequency of the carrier wave; and a gate signal generator that uses the carrier wave to pulse width modulate a voltage command according to a torque command, and generates a gate signal for controlling operation of the power converter, wherein the carrier wave frequency adjuster adjusts the voltage command and carrier wave phase difference to reduce eddy current loss generated in rotor magnets of the alternating current motor according to a d-axis current flowing to the alternating current motor and the rotational speed of the alternating current motor.

Motor control device, mechatronic unit, power generation system, boost converter system, and electric vehicle system

An object of the present invention is to sufficiently suppress a vibration and noise generated in a motor. A motor control device includes a first inverter circuit and a second inverter circuit of a redundant system, the first inverter circuit and the second inverter circuit controlling a motor, and a control unit that controls the first inverter circuit and the second inverter circuit. The first inverter circuit converts the DC power into the AC power based on a PWM signal generated by using a first carrier signal. The second inverter circuit converts the DC power into the AC power based on a PWM signal generated by using a second carrier signal. The control unit shifts phases of the first carrier signal and the second carrier signal by using, as a reference, pulsation of an electromagnetic force caused by a magnetic circuit of the motor.

Motor control device, electric vehicle, and motor control method

An inverter control deviceincludes a PWM control unitthat generates a PWM pulse for controlling an inverter, and a pulse edge control unitthat performs pulse edge control for correcting (shifting) a phase of a pulse edge of the PWM pulse generated by the PWM control unit. The PWM control unitgenerates a PWM pulse by using a modulation rate based on a voltage command (Vd*, Vq*). The pulse edge control unitcorrects the PWM pulse so that a phase difference between a zero cross point where the modulation wave changes across 0 and a pulse edge of the PWM pulse falls within a predetermined range.

Inverter control device and electric vehicle system

A deviation between a detection result of an output current of an inverter and an actual current is suppressed. A current detection unitdetects a three-phase AC current output from an inverteror input to the inverter. An inverter control devicecontrols the inverterbased on a current detection value based on a detection result of the three-phase AC current by the current detection unitand a predetermined current command value. The inverter control devicecorrects the current detection value so as to correct a detection error of the three-phase AC current generated due to a delay time of a filterwhich is a filter element provided in the current detection unit

Conventionally, there is a problem that switching loss of an inverter increases in a case where a change such as improvement in a switching frequency is involved. The battery voltage E and the torque command T* are input to the first current command generation unit. The battery voltage E, the torque command T*, and a voltage utilization rate obtained by dividing a line voltage effective value by a battery voltage (DC voltage) are input to a second current command generation unit. A magnet temperature Tmag of a rotor magnet is input to a current command selection unit, and a current command output from the first current command generation unitis selected in normal operation, and the second current command generation unitis selected in a case where the magnet temperature exceeds a predetermined value. The second current command generation unitis configured not to obtain the voltage utilization rate of 0.3 to 0.4.

Motor control device, electromechanical integrated unit, and electric vehicle system

The present invention addresses the problem of properly performing motor control during overmodulation. In a motor control device, a carrier wave frequency adjusting unitadjusts a carrier wave frequency fc so as to change a voltage phase error Δθv representing the phase difference between three-phase voltage commands Vu*, Vv*, Vw* and a triangular wave signal Tr. When a modulation factor H in accordance with the voltage amplitude ratio between the DC power supplied from a high voltage battery to an inverter and AC power output from the inverter to a motor exceeds a predetermined value, for example, 1.15, a current control unitcorrects the amplitudes and phases of a d-axis voltage command Vd* and a q-axis voltage command Vq* on the basis of a carrier wave phase difference Δθcarr representing the phase of the triangular wave signal Tr.

Motor control device, electromechanical unit, electric vehicle system, and motor control method

An inverter control deviceincludes a current control unitthat outputs a voltage commands (Vd*, Vq*), a modulation wave control unitthat generates a modulation wave based on the voltage commands (Vd*, Vq*), a pulse generation unitthat generates a PWM pulse for controlling an inverterusing a modulation wave and a carrier wave of a predetermined frequency, and a pulse shift unitthat corrects the phase of the PWM pulse such that the PWM pulse is output in a phase corresponding to a harmonic of a predetermined order of the modulation wave in the near-zero-cross region including the zero-cross point at which the modulation wave changes across 0.

Inverter control device

The vibration and noise generated in a permanent magnet synchronous motor are effectively suppressed. A motor control devicecomprises: a triangular wave generation unitwhich generates a triangular wave signal Tr that is a carrier wave, a carrier frequency adjustment unitwhich adjusts a carrier frequency fc that represents a frequency of the triangular wave signal Tr, and a gate signal generation unitwhich performs pulse-width modulation on three-phase voltage commands Vu*, Vv*, Vw* according to a torque command T* using the triangular wave signal Tr, thereby generating a gate signal for controlling an operation of an inverter. The carrier frequency adjustment unitadjusts the carrier frequency fc so as to change a voltage phase error Δθv representing a phase difference of the three-phase voltage commands Vu*, Vv*, Vw* and the triangular wave signal Tr based on the torque command T*, and a rotation speed ωr of a motor.

Motor control device, motor control method, hybrid system, boost converter system and electric power steering system

A motor control device includes a PWM control unit, a carrier frequency setting unit, and a carrier frequency switching calculation unit. The PWM unite generates a signal to drive an inverter by pulse width modulation. The carrier frequency setting unit sets a carrier frequency used for pulse width modulation according to a number of rotations of a motor. The carrier frequency switching calculation unit calculates a frequency switching speed of the carrier frequency and is configured to perform a calculation method. The calculation method includes setting at least one of an emergency mode, a response priority mode, or a fluctuation suppression priority mode in response to various operating conditions.

Motor control device

A random value integration unitoutputs a random value output from a random value generation unitin a diffusion width Rand output from a diffusion width generation unitby a product of an output of the random value generation unitand an output of the diffusion width generation unit. A triangular wave signal generation unitgenerates a triangular wave signal corresponding to a second carrier frequency fcwhich is obtained by adding the random value output from the random value integration unitto a first carrier frequency fcwhich is an output of a carrier frequency setting unit. That is, a frequency obtained by increasing the diffusion width of the first carrier frequency fcis used as the second carrier frequency fc, and the second carrier frequency is used as the carrier frequency.

Motor control device and electric vehicle system

An object of the present invention is to provide a motor control device that can suppress electromagnetic noises including a switching noise and to an electric vehicle system using the motor control device. A motor control device includes: a power converter that is controlled by a pulse width modulation signal; a motor that is driven by the power converter; and a controller that generates the pulse width modulation signal, based on a carrier signal. When switching between a first carrier frequency (fc1) of the carrier signal and a second carrier frequency (fc2) of the carrier signal, the controller varies proportions of the first carrier frequency and the second carrier frequency in accordance with a number of rotations of the motor, the second carrier frequency being higher than the first carrier frequency.

Motor control device and electric vehicle system using the same

An object of the present invention is to effectively reduce vibration or noise caused by a motor. An inverter circuitgenerates an alternating current from a direct current supplied from a direct current power supplyby using a plurality of IGBTswhich are switching elements, supplies the generated alternating current to a motor, and drives the motor. This alternating current includes a fundamental harmonic current corresponding to a rotational speed of the motor, and a harmonic current of a switching operation of the IGBTs. A controllercontrols a second phase such that a first phase and the second phase are not superimposed on each other at a predetermined motor rotational speed, the first phase being a phase of an excitation force cyclically produced in the motorby the fundamental harmonic current, and the second phase being a phase of an excitation force cyclically produced in the motorby the harmonic current.

Growing community of inventors

Tokyo, Japan

Takafumi Hara