Denso Corporation

Hiroshi Inamura

Hiroya Tsuji

Takuto Suzuki

Tsuneo Maebara

Junichi Fukuta

Tetsuya Matsuoka

Yasuaki Aoki

Takahumi Oowada

Akira Nakasaka

Hideaki Tachibana

Makoto Okamura

Koichi Nishibata

Tatsuru Morioka

Kenji Inokuma

Hiroyoshi Sawada

Takayuki Kakihara

Hajime Uematsu

Mitsuharu Matsuno

Tomohiro Senkou

Shintarou Kogure

A power system with an electric rotating machine providing an operation of power generation and power running, a switching circuit providing electricity for each phase, by switching a plurality switching elements ON/OFF by the electric rotating machine, a battery section connected to the switching circuit, and switches on electrical pathway, between the switching circuit and the battery section. A power shutoff section to shutoff an electrical pathway when an overcurrent flows in, at least one of the electric rotating machine and the switching circuit. Power control devices are provided with an overcurrent determination which determines that an overcurrent has occurred, based on results of, a first determination that determines a current flow has increased to a predetermined over current threshold, and a second determination that determines that current flow has decreased thereafter, and a switch control that switches the switches open based on a determined result of the overcurrent determination.

Power control apparatus

A first and a second control device capable of transmitting and receiving signals to and from a third control device that performs an overall management to the control devices. The third device transmits a command signal to the second device in response to a reception signal from the first device. The first device transmits, to the second device and the third device, an electrical power storage unit signal includes at least one of control information and abnormality information about charging/discharging. The second device includes a function of controlling actuation of a rotating electrical machine on the basis of an actuation command signal about actuation of the rotating electrical machine transmitted from the third device in response to the electrical power storage unit signal, and a function of controlling actuation of the rotating electrical machine on the basis of the electrical power storage unit signal transmitted from the first device.

Control system

A power conversion apparatus includes a semiconductor module that includes a main body containing at least one semiconductor element, power terminals projecting from the main body to be connected to a high-voltage DC power supply and high-voltage signal terminals projecting from the main body, and is configured to convert a DC power supplied from the high-voltage DC power supply to an AC power by switching operation of the semiconductor element. The power conversion apparatus further includes a low-voltage component connected to a low-voltage DC power supply and a control circuit board on which a control circuit for controlling the switching operation of the semiconductor element is formed. The control circuit board is connected with low-voltage signal terminals extending from the low-voltage component and the high-voltage signal terminals. The low-voltage and high-voltage signal terminals are solder-connected to the control circuit board.

Power conversion apparatus

A power converter including a semiconductor module; a cooler having a pair of coolant pipes; a casing provided with a pair of openings, housing the semiconductor module and the cooler; and a pair of grommets being fitted to the pair of openings where the pair of coolant pipes are inserted into the pair of grommets. Each of the grommet includes: a grommet body having a through hole through which a corresponding coolant pipe is inserted and a sealing surface that intimately contacts an inner peripheral surface of a corresponding opening; and a guide provided to one end of the grommet body, with respect to a direction of inserting the coolant pipe, so as to be projected outward further than the sealing surface. Each of the grommet is embedded with a reinforcement member with at least a part of the reinforcement member being located in the guide.

Power converter including semiconductor module and cooler

A power conversion device comprises a main circuit section that has a semiconductor module with a switching element therein and including a main electrode terminal, a capacitor with a capacitor element therein and that includes a capacitor terminal, and a bus bar that connects the main electrode terminal and the capacitor terminal. The capacitor terminal extends from a capacitor main body including the capacitor element therein towards the main circuit section. The bus bar provides a bending section on a base end side of a connecting section between the bus bar and the capacitor terminal. The bus bar and the capacitor terminal are connected such as to overlap in a state in which respective tip directions match.

Power conversion device

In a vehicle, a control apparatus controls a power converter supplying a rotary machine which can operate as a drive motor of the vehicle, and controls a cooling apparatus for circulating a coolant fluid through the rotary machine and the power converter. When a temporary condition occurs immediately after commencement of the circulation, whereby the temperatures of the coolant fluid and of switching elements in the power converter are judged to concurrently exceed respective specified temperature thresholds, the control apparatus limits the maximum power that can be supplied from the power converter to a lower value than is normally available. When the temperature of the coolant fluid is judged to no longer exceed the corresponding temperature threshold, the limiting is released.

Control apparatus for a power converter connected to a rotary machine which is operable as a drive motor of a vehicle

The power conversion apparatus includes semiconductor modules and a circuit board on which a control circuit is formed. Each semiconductor module includes signal terminals electrically connected to the circuit board. The signal terminals of each semiconductor module are arranged in a line so as to form a terminal row along a first direction. The semiconductor modules are grouped into upper arm semiconductor modules and lower arm semiconductor modules each connected to a corresponding one of the upper arm semiconductor module. Upper arm terminal rows as the terminal rows of the upper arm semiconductor modules and lower arm terminal rows as the terminal rows of the lower arm semiconductor modules are arranged in a staggered manner along a second direction perpendicular to the first direction and to a third direction in which the signal terminals of the semiconductor modules project, the first, second and third directions being perpendicular to one another.

The power conversion device includes a plurality of semiconductor modules, each having a main body section including a switching element therein. In a module unit, a positive module and a negative module are disposed such that main surfaces of the respective main body sections oppose each other. A positive terminal, a first intermediate terminal, a negative terminal, and a second intermediate terminal project in a Z direction perpendicular to X direction in which the positive module and the negative module oppose each other. A first vector Vfrom the positive terminal towards the first intermediate terminal and a second vector Vfrom the second intermediate terminal towards the negative terminal are configured such that these vector components Vand Vin a Y direction perpendicular to both the X and Z directions are opposite to each other.

In a system for controlling a rotary machine, a circuit outputs an AC voltage to be applied to a rotary machine. A storage stores therein measurement-error information indicative of a measurement error of the measuring unit. A torque-feedback adjuster manipulates a phase of the output voltage of the circuit based on the rotational angle of the rotary machine measured by a measuring unit and the measurement-error information to adjust a torque of the rotary machine to a request torque. The phase is obtained from information fed back from the rotary machine. An abnormality determiner determines whether there is an abnormality to disable using accurate measurement-error information. A limiter limits adjustment of the torque of the rotary machine to the request torque by the torque-feedback adjuster when it is determined that there is an abnormality to disable using accurate measurement-error information.

Apparatus for carrying out improved control of rotary machine

The control apparatus is for an electric rotating machine which is mounted as an engine on a vehicle together with a power conversion circuit to be connected to the electric rotating machine, and a cooling apparatus for circulating coolant to the electric rotating machine and the power conversion circuit through a circulation channel, including. The control apparatus includes a limiting means for performing a limiting operation to limit an amount of electric power supply from the inverter to the electric rotating machine each time a circulation starting timing of the coolant comes, and a terminating means for terminating the limiting operation after a lapse of a predefined period from start of the limiting operation.

Control apparatus for electric rotating machine

A control apparatus is for use in a power conversion system including a DC/AC converter circuit connected to an electric rotating machine at output terminals thereof and to a DC power source at input terminals thereof through a switching means, a capacitor being connected across the input terminals of the DC/AC converter circuit. The control apparatus includes a current supply means configured to perform current supply control to supply a current to the electric rotating machine in order to discharge the capacitor by manipulating the DC/AC converter circuit in a state where the switching means is set open, and a speed lowering means configured to apply a brake force to a rotating shaft of the electric rotating machine to reduce a rotational speed of the electric rotating machine prior to the current supply control being performed by the current supply means if the rotational speed exceeds a specified speed.

Control apparatus for power conversion system including DC/AC converter connected between electric rotating machine and DC power source

A control apparatus for use with an electric power conversion system which is equipped with a dc/ac converter connected to an electric rotating machine and a capacitor joined to input terminals of the dc/ac converter. The control apparatus stores an angle of rotation (i.e., start angle &#x3b8;) of the electric rotating machine before start of control of energization of the electric rotating machine to discharge the capacitor and determines command currents idr and iqr which will result in zero (0) torque in the electric rotating machine. The control apparatus includes a command current correcting circuit which corrects the command currents idr and iqr by a difference between a current angle &#x3b8; of rotation of the electric rotating machine and the start angle &#x3b8;, thereby avoiding constant rotation of the electric rotating machine when the capacitor is discharged.

A drive system has a low voltage system, a high voltage system, and a transformer. The high voltage system has drive units which correspond to power switching elements. A capacitance in the high voltage system serves as a flouting power source which supplies electric power to each of the drive units. An output voltage of a secondary side coil of the transformer is supplied to the capacitance. A comparator compares the output voltage at the secondary side coil of the transformer with a threshold value. A switching speed change part changes the switching speed of each of the power switching element based on the comparison result of the comparator.

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Kariya, Japan

Hiroshi Inamura