Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Panasonic Automotive Systems Co., Ltd.

Tetsuya Matsuyama

Atsuo Okaichi

Takumi Hikichi

Osao Kido

Noriyoshi Nishiyama

Yoshio Tomigashi

Osamu Kosuda

Masaaki Konoto

Subaru Matsumoto

Yuya Tanaka

Junki Yoshimoto

A rotary machine control device includes: a magnetization characteristics determiner that determines a magnet phase of a magnet flux based on an estimated magnetic flux and a detection current, and determines a qm-axis magnetic flux of the estimated magnetic flux, a qm-axis current of the detection current, and a harmonic component of a magnet phase using a dm-qm coordinate system with a dm axis representing the magnet phase and a qm axis representing a phase shifted by 90 degrees from the magnet phase; a ripple compensation determiner that determines a ripple compensation phase using a ripple compensation torque obtained based on the qm-axis current and the harmonic component; a command phase determiner that determines a command phase based on the ripple compensation phase and a torque command; and a command magnetic flux generator that generates a command magnetic flux based on a command amplitude and the command phase.

Rotary machine control device

A rotary machine control device includes: a flux estimator that estimates a rotary machine flux; a command amplitude specifier that generates a command amplitude that is an amplitude of a command flux, by executing feedback control using a product of an estimated flux or an estimated magnet flux and a detected current; a command flux specifier that generates the command flux using the command amplitude; and a switcher that controls switching from a current synchronous operation to a flux control operation. When the switcher controls switching to the flux control operation, the flux estimator gives, to the feedback control, an amplitude of the estimated flux estimated before switching to the flux control operation, as an initial value of the command amplitude immediately after switching to the flux control operation.

A turbocompressor apparatus includes a turbocompressor including a compressor motor, a lubrication pump including a pump motor, a converter that performs electric power conversion between a voltage of a power source and a direct-current voltage of a direct-current voltage unit in a case where electric power is being supplied from the power source to the turbocompressor apparatus; a first inverter that performs electric power conversion between the direct-current voltage and a first alternating-current voltage vector of the compressor motor; and a second inverter that performs electric power conversion between the direct-current voltage and a second alternating-current voltage vector of the pump motor. The compressor motor generates regenerative electric power by regenerative driving and the pump motor is driven by the regenerative electric power in a case where supply of electric power from the power source to the converter is being cut off.

Turbocompressor comprising a compressor motor generating regenerative electric power by regenerative driving capable of driving a compressor motor

An air cooling unit is an air cooling unit used in a Rankine cycle system and includes an expander and a condenser. The expander recovers energy from a working fluid by expanding the working fluid. The condenser cools the working fluid using air. The air cooling unit includes a heat-transfer reducer that reduces heat transfer between the expander and an air path.

Air cooling unit

A combined heat and power system according the present disclosure includes a Rankine cycle apparatus including an evaporator that heats a working fluid by heat exchange between the working fluid and a heat source medium, an expansion machine that converts expansion power of the working fluid into rotational power, and a condenser that cools the working fluid by heat exchange between the working fluid and a heat medium, and a thermal circuit for using the heat medium heated by the condenser. An expansion volume ratio of the expansion machine is equal to or less than an expansion ratio in a theoretical Rankine cycle determined based on a state of a temperature and a pressure of the working fluid at a discharge port of the expansion machine and a state of a temperature and a pressure of the working fluid at a suction port of the expansion machine.

Combined heat and power system including expander having expansion volume ratio equal to or less than that of theoretical rankine cycle

A permanent magnet synchronous machine includes a rotor including a core body and an overhang protruding further in an axial direction than a core of a stator. An end surface of the core body includes an N-region disposed on a north pole and an S-region disposed on a south pole. The overhang includes first permanent magnets arranged along an outer edge of the end surface with distances therebetween and a plurality of second permanent magnets disposed on the end surface and adjacent to the first permanent magnets. The first permanent magnets include at least one of a permanent magnet comprising a north pole facing the N-region and a permanent magnet comprising a south pole facing the S-region. The second permanent magnets are provided in the configuration which causes the second permanent magnets to generate a magnetic flux extending from the S-region toward the N-region.

Permanent magnet synchronous machine

A Rankine cycle device in the present disclosure includes an evaporator as a heater, an expander, a cooler, a first temperature sensor, a second temperature sensor, and a control device. The first temperature sensor detects a temperature of the working fluid flowing from an outlet of the heater to an inlet of the expander in the circuit of the working fluid. The second temperature sensor detects a temperature of the working fluid flowing from an outlet of the expander to an inlet of the cooler. The controller controls a number of rotation of the expander based on a difference between a detected temperature of the first temperature sensor and a detected temperature of the second temperature sensor.

Rankine cycle device

A power generation control system includes a converter and a controller. The converter controls a generator of a Rankine cycle system, the Rankine cycle system including an expander, the generator, which is interconnected to the expander, a pump which feeds a working fluid, and an evaporator which evaporates a working fluid. The controller causes the converter to execute, in at least one of a startup operation and a shutdown operation of the Rankine cycle system, first control in at least one of a startup operation and a shutdown operation of the Rankine cycle system such that the expander is prevented from expanding a working fluid if the working fluid at an outlet of the evaporator contains a liquid component while the pump is operating.

Power generation control system, power generation apparatus, and control method for rankine cycle system

The present invention provides a power supply device for an electric vehicle that allows highly efficient operation of a compressor inverter. A power supply device for motor vehiclehas: a main circuithaving a power source, a DC-DC converter, and a main inverterthat drives a main motor; an auxiliary circuithaving an auxiliary inverterthat drives an auxiliary motor, a first electrical circuitthat is connected to the main circuiton a primary side of the DC-DC converter, a second electrical circuitthat is connected to the main circuiton a secondary side of the DC-DC converter, and a connection circuitconfigured to be capable of selecting one of the first electrical circuitand the second electrical circuitas a path for supplying a direct current voltage to the auxiliary inverter; and a control devicethat controls the connection circuitwhen the main motoris in power running operation so that switching between the first electrical circuitand the second electrical circuitis performed corresponding to a required voltage of the auxiliary inverter

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Nara, Japan

Tetsuya Matsuyama