Abstract: A control method of inverter for driving motor including a magnet, comprises detecting a rotation state of the motor by a rotation sensor, detecting current of the motor by a current sensor, calculating, based on a torque command value, a detection value of the rotation state detected by the rotation sensor, and detection current detected by the current sensor, a voltage command value for controlling a voltage of the motor by a controller for controlling the inverter, specifying a value of at least one of a local maximum value, a local minimum value, and an average value of the torque voltage command value included in the voltage command value as a torque determination target command value by the controller, comparing a demagnetizing determination threshold value with the torque determination target command value by the controller, and determining whether or not demagnetization of the magnet occurs in accordance with the compared result.

Abstract: A control method of inverter for driving motor including a magnet, comprises detecting a rotation state of the motor by a rotation sensor, detecting current of the motor by a current sensor, calculating, based on a torque command value, a detection value of the rotation state detected by the rotation sensor, and detection current detected by the current sensor, a voltage command value for controlling a voltage of the motor by a controller for controlling the inverter, specifying a value of at least one of a local maximum value, a local minimum value, and an average value of the torque voltage command value included in the voltage command value as a torque determination target command value by the controller, comparing a demagnetizing determination threshold value with the torque determination target command value by the controller, and determining whether or not demagnetization of the magnet occurs in accordance with the compared result.

Abstract: A mounting structure for a power conversion device includes: a vehicle body component extending in a front-rear direction of a vehicle; a mounting component provided on the vehicle body component; a drive unit held by the vehicle body component via the mounting component; and a power conversion device attached to the mounting component. A stiffness of the mounting component is greater than a stiffness of the vehicle body component. The power conversion device is arranged between a front end and a rear end of the drive unit in a side view of the vehicle.

Abstract: A drive device of the present invention includes: an electric motor including a cooling channel; a power conversion unit that converts electric power from a power supply and outputs electric power to be supplied to the electric motor; and a supporting member fixed to the electric motor with the power conversion unit mounted on the supporting member. The supporting member includes a cooling channel connected to the cooling channel of the electric motor.

Abstract: A mounting structure for a power conversion device includes: a vehicle body component extending in a front-rear direction of a vehicle; a mounting component provided on the vehicle body component; a drive unit held by the vehicle body component via the mounting component; and a power conversion device attached to the mounting component. A stiffness of the mounting component is greater than a stiffness of the vehicle body component. The power conversion device is arranged between a front end and a rear end of the drive unit in a side view of the vehicle.

Abstract: A drive device of the present invention includes: an electric motor including a cooling channel; a power conversion unit that converts electric power from a power supply and outputs electric power to be supplied to the electric motor; and a supporting member fixed to the electric motor with the power conversion unit mounted on the supporting member. The supporting member includes a cooling channel connected to the cooling channel of the electric motor.

Abstract: A power converter (30) comprising components of a power converter circuit, the components including switching elements (31 to 36), smoothing capacitors (37 to 39), and circuit boards (66 and 67) on which drive circuit parts for driving the switching elements are mounted, wherein the components are housed in a case (65), input power is converted and output through high-voltage terminals (69 to 79), and the high-voltage terminals (69 to 79) and the circuit boards (66 and 67) are provided in a common plane area (E).

Abstract: A mounting structure of a high voltage unit for an electric vehicle includes a first high voltage unit that has vehicle body fixing parts to be fixed to a vehicle body at both ends in a width direction, and a second high voltage unit that is arranged on an upper side of the first high voltage unit in a vertical direction of the vehicle, in which, in the second high voltage unit, a high voltage heavy component included in the second high voltage unit is arranged closer to a lowermost surface in the vertical direction of the vehicle.

Abstract: A power converter (30) comprising components of a power converter circuit, the components including switching elements (31 to 36), smoothing capacitors (37 to 39), and circuit boards (66 and 67) on which drive circuit parts for driving the switching elements are mounted, wherein the components are housed in a case (65), input power is converted and output through high-voltage terminals (69 to 79), and the high-voltage terminals (69 to 79) and the circuit boards (66 and 67) are provided in a common plane area (E).

Abstract: Disclosed is an integrated power electric unit mounted on an electric vehicle, comprising a first power electric unit, a second power electric unit arranged over the first power electric unit in a vertical direction of the vehicle, a channel that connects the first and second power electric units so as to flow the air, and a breather provided in the second power electric unit to cause inner and outer sides of the second power electric unit to communicate with each other.

Abstract: A power converter configured to be mounted on an electrically driven vehicle comprises a control board that controls a power module including a semiconductor device, a connector provided on the control board so as to be connected to an external controller, a strong electric component arranged so as to overlap the control board, and a housing that houses the control board and the strong electric component. A bottom portion of the housing is formed to swell in a convex-shaped manner, a part of the strong electric component is housed in an area of the housing that swells in the convex-shaped manner, and the strong electric component is formed so that a projection area thereof to the overlappingly arranged control board is smaller than a surface area of the control board. The connector is arranged in an area of the control board broader than a projection plane of the overlappingly arranged strong electric component to the control board.

Abstract: A mounting structure of a high voltage unit for an electric vehicle includes a first high voltage unit that has vehicle body fixing parts to be fixed to a vehicle body at both ends in a width direction, and a second high voltage unit that is arranged on an upper side of the first high voltage unit in a vertical direction of the vehicle, in which, in the second high voltage unit, a high voltage heavy component included in the second high voltage unit is arranged closer to a lowermost surface in the vertical direction of the vehicle.

Abstract: A power converter configured to be mounted on an electrically driven vehicle comprises a control board that controls a power module including a semiconductor device, a connector provided on the control board so as to be connected to an external controller, a strong electric component arranged so as to overlap the control board, and a housing that houses the control board and the strong electric component. A bottom portion of the housing is formed to swell in a convex-shaped manner, a part of the strong electric component is housed in an area of the housing that swells in the convex-shaped manner, and the strong electric component is formed so that a projection area thereof to the overlappingly arranged control board is smaller than a surface area of the control board. The connector is arranged in an area of the control board broader than a projection plane of the overlappingly arranged strong electric component to the control board.

Abstract: Disclosed is an integrated power electric unit mounted on an electric vehicle, comprising a first power electric unit, a second power electric unit arranged over the first power electric unit in a vertical direction of the vehicle, a channel that connects the first and second power electric units so as to flow the air, and a breather provided in the second power electric unit to cause inner and outer sides of the second power electric unit to communicate with each other.

Abstract: With the objective of providing a scanning receiver capable of capturing a target radio wave in an extremely short period of time by use of a simple constituting means, a plurality of wide frequency division bands in which a full frequency range is divided into predetermined frequency ranges are set and the field intensities of received radio waves are retrieved using the output of an intermediate frequency amplifier circuit over the set wide frequency division bands in order. Further, when a received radio wave having a field intensity greater than or equal to a prescribed level is obtained upon the above retrieval, receive frequencies are swept from one end of each of the wide frequency division bands to the other end thereof. When a target radio wave can be captured upon the above sweeping, transition to the operation of receiving the target radio wave is performed.

Abstract: The present invention provides a transmitter-receiver for short-range wireless transmission, which comprises a frequency scan signal receiving section that searches a vacant channel frequency by frequency scanning of a receiving wave, and a signal transmitting section that transmits a transmitting wave using the searched vacant channel frequency. The frequency scan signal receiving section sequentially changes a frequency of a PLL oscillator by control of a controller to thereby search the presence or absence of a receive frequency lying in a predetermined frequency band depending on an output state of a carrier detector. When the controller detects a vacant channel frequency, the frequency scan signal receiving section fixes the oscillation frequency of the PLL oscillator to an oscillation frequency corresponding to the vacant channel frequency and supplies the fixed oscillation frequency to the signal transmitting section.

Abstract: The present invention provides a data transfer system that performs a data transfer between a master receiver and at least one slave receiver each of which has a built-in memory storing data therein and is identical in configuration. Upon the data transfer, such at least one slave receiver in which the data transfer is performed, is disposed in the neighborhood of the master receiver. The master receiver FSK-modulates a local oscillation signal of a first local oscillator and a standard frequency signal of a standard signal generator using the data read from the corresponding built-in memory, and radiates the first local oscillation signal generated from the first local oscillator into the air as a leakage radio wave, whereas such at least one slave receiver receives the leakage radio wave therein and writes data acquired from the received signal into the corresponding built-in memory, whereby a data transfer is performed between the master receiver and the slave receiver.

Abstract: With the objective of providing a scanning receiver capable of capturing a target radio wave in an extremely short period of time by use of a simple constituting means, a plurality of wide frequency division bands in which a full frequency range is divided into predetermined frequency ranges are set and the field intensities of received radio waves are retrieved using the output of an intermediate frequency amplifier circuit over the set wide frequency division bands in order. Further, when a received radio wave having a field intensity greater than or equal to a prescribed level is obtained upon the above retrieval, receive frequencies are swept from one end of each of the wide frequency division bands to the other end thereof. When a target radio wave can be captured upon the above sweeping, transition to the operation of receiving the target radio wave is performed.

Abstract: A frequency scanning receiver minimizes the time needed for setting the frequency of a phased lock loop of a first local oscillator. The frequency scanning receiver is configured so that when the reference frequency of the PLL of the first local oscillator has been set at a high frequency, and the frequency error is less than the second IF, the frequency error is controlled to be zero by the control circuit switching the frequency of a second local oscillator or third local oscillator to an appropriate frequency using an output of a frequency discriminator.

Abstract: A current controller includes a pulse width modulation signal outputting circuit, a saw-tooth-wave signal generating circuit, a command value smoothing circuit, a detection value amplifying circuit, a deviation integrating circuit, and a current controlling circuit. The current controlling circuit controls a current caused to flow through a solenoid on the basis of a saw-tooth-wave signal having the same period as that of a pulse width modulation signal, and a detection signal generated by the deviation integrating circuit.