Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Masayoshi Suhama

Hideto Hanada

Masaki Okamura

Kazuhito Hayashi

Ken Iwatsuki

Toshifumi Yamakawa

Kenji Yamada

Ryoji Sato

Hiroaki Kioka

Toshiya Hashimoto

Takashi Ota

Eiji Sato

Satoru Katoh

Shogo Tanaka

Daisuke Ogino

Yuki Sugiyama

Kazuhide Miyata

Tetsuhiro Itoh

An electric vehicle driven by a synchronous motorand an induction motor, and braked with a first regenerative torque BTgenerated by the synchronous motor generatorand a second regenerative torque BTgenerated by the induction motor generator. The ratio of the first regenerative torque BTto the second regenerative torque BTis changed in accordance with a state of charge (SOC) of a battery. In this way, a switching frequency from a regenerative brake to a hydraulic brake is restricted to improve drivability when a state of charge (SOC) of the batteryis high.

Electric vehicle and control method of electric vehicle

A rotary electric machine control system includes a rotary electric machine (second motor generator), a number-of-revolutions sensor that measures the number of revolutions per predetermined time period of the rotary electric machine, and a controller. The controller has a threshold changing unit for changing a control switching phase that is a control switching threshold to be used for switching the control mode of the rotary electric machine, according to a measurement result of the number of revolutions.

Rotary electric machine control system and rotary electric machine control method

A hybrid vehicle provided with a battery, a boost converter, a first inverter, a second inverter, a first motor generator (MG)connected to the first inverter, a second MGconnected to the second inverter, an enginecapable of driving the first MG, and a controllerwhich starts and stops the boost converter. When electric power transmitted between the batteryand the boost converteris equal to or below a predetermined threshold, the boost converteris stopped. When an actual boost voltage of the boost converterreaches a predetermined threshold, the first MGis driven by the engine. In this way, the system efficiency of a hybrid vehicle can be advantageously improved by efficiently maintaining the boost converter at a halt for a sufficiently long period.

Hybrid vehicle having boost converter and control method of a hybrid vehicle having a boost converter

A control device controls an inverter controlling an output of a motor by PWM control. The control device calculates a reference frequency based on a torque and a rotation speed of the motor, calculates a random coefficient using two data tables, and calculates, as a random frequency, a value obtained by adding, to a reference frequency, a value obtained by multiplying a prescribed width by the random coefficient. The control device calculates control limit lines based on the rotation speed of the motor, and corrects the random frequency so as to fall within a range that is higher than the control limit line and lower than the control limit line. The control device generates a carrier signal having a random frequency as a carrier frequency.

Control device and control method for power control unit

A controller for a vehicle including two inverters determines whether a detector currently performs an insulation determination process, and if not, the controller performs random control to randomly vary carrier frequencies corresponding to the two inverters, respectively. In contrast, if the insulation determination process is currently performed, the controller prohibits the random control and fixes the carrier frequencies at reference frequencies, respectively. The reference frequencies are previously set to have a difference &#x394;fs larger than a predetermined value f

Controller for vehicle

A controller controls switching of IGBT devices of an inverter according to the desired output of the permanent magnet motor. The controller includes: a magnet temperature detection device that detects the magnet temperature of the permanent magnet motor based on the output of a temperature sensor; a setting device that sets a threshold value of the magnet temperature corresponding to the desired output of the permanent magnet motor, based on a predetermined relation between the output from the permanent magnet motor and a critical temperature, up to which demagnetization in the permanent magnet motor is not caused; and a carrier frequency control device that, when the magnet temperature detected by the magnet temperature detection device exceeds the threshold value, changes the carrier frequency, at which the IGBT devices are switched, such that a ripple current superimposed on a motor current that flows through the permanent magnet motor is reduced.

Motor driver and method of controlling the same

When instructed to switch control modes between overmodulation PWM control and sinusoidal wave PWM control, control device corrects the amplitude of a voltage command signal based on a state of power conversion operation performed by an inverter, so as to suppress a change in an influence of dead time over a voltage applied to an alternating-current motor upon switching the control modes. The state of the power conversion operation performed by the inverter includes at least one of a present value of a carrier frequency in a control mode currently employed, an estimated value of the carrier frequency to be obtained when switching the control modes, the length of the dead time, a power factor of alternating-current power exchanged between the inverter and the alternating-current motor, and a driving state of the alternating-current motor.

Control device and control method for alternating-current motor

A motor drive control device includes a battery, a converter, an inverter, and a control section for outputting control signals to the converter and the inverter. The control section has a first map and a second map regarding control of the alternating-current motor and further includes a map switching section for switching from control based on the first map to control based on the second map in accordance with conditions of the battery.

Motor drive control device

A vehicle includes a converter for stepping up power provided from a power storage device, and an inverter for converting the power output from converter and outputting it to an alternating-current motor for driving the vehicle. In the vehicle, a rectangular voltage control unit controls the inverter by means of rectangular wave voltage control that is based on a torque command value and the like, so as to control an output torque of the alternating-current motor. A system voltage control unit controls a system voltage, which is an output voltage of the converter. The system voltage control unit lifts a restriction on a system voltage command value based on an accelerator pedal position and the like, and then increases it. When increasing the system voltage command value during the rectangular wave voltage control for the inverter, a cooperative control unit increases the system voltage command value and the torque command value in a cooperative manner.

Control device and control method for vehicle

In the hybrid vehicle, a boost converter is controlled to make a post-boost voltage or a voltage on the side of an inverter become a target post-boost voltage corresponding to a target operation point of a motor in accordance with a target post-boost voltage setting map that divides an operation region of the motor into a non-boost region and a boost region when a operation point of the motor is included in the boost region. The target post-boost voltage setting map is prepared so that the non-boost region includes a region in which a loss produced by driving the motor when not boosting the post-boost voltages becomes smaller than the loss produced when boosting the post-boost voltage and the boost region includes a region in which the loss produced when boosting the post-boost voltage becomes smaller than the loss produced when not boosting the post-boost voltage.

Motor drive control apparatus, vehicle with motor drive control apparatus, and motor drive control method

When an electric vehicle outputs a torque instruction, firstly, a request torque is acquired and a judged whether the acquired request torque is positive or negative. Regardless of the sign of the request torque, it is judged whether the eco-switch is ON. If the request torque has a positive sign and the eco-switch is OFF, a map A is selected. If the eco-switch is ON, a map B which limits the maximum torque to a low value for the map A is selected. If the request torque has a negative sign, a map C is selected regardless of the eco-switch ON/OFF state and the maximum torque is not limited.

Electric vehicle control device

By the vehicle controller of the present invention, when the economy mode is selected by a driver, boosting by a converter is limited and output torque of a motor is limited. Even in the economy mode, however, if the driver requests large torque, either the limit on boosting or the limit on output torque is cancelled. As a result, a vehicle controller for a vehicle including a battery, a converter boosting/lowering the battery voltage and a motor operating with the power from the converter is provided, by which unnecessary power consumption is reduced and the torque requested by the driver can be generated.

Vehicle controller and control method

When a target operation point of either a motor MGor a motor MGis included in a resonance range specified by operation points of the motor MGor the motor MGin the occurrence of resonance in a booster converter, a hybrid vehicle controls the booster converter to make the voltage on the side of inverters approach to a preset target boosted voltage that is higher than the voltage on the side of the battery, while controlling the inverters by sine-wave control.

Motor drive control apparatus, vehicle equipped with motor drive control apparatus, and motor drive control method

A loss reduction module of an electric vehicle control device has a function to limit a torque to not exceed a constant loss characteristic and issue a torque instruction if a requested torque exceeds the constant loss characteristic when an ecology switch is turned ON and low fuel consumption travel is instructed. More specifically, when a requested torque exceeding the constant loss characteristic is input, a torque limit is applied to a point on the constant loss characteristic. Accordingly, the torque instruction is output as a torque which is suppressed more than a characteristic curve obtained by combining the constant loss characteristic and a characteristic indicating the relationship between the torque and the number of rotations during normal travel.

When an electric vehicle outputs a torque instruction, firstly, a request torque is acquired and a judged whether the acquired request torque is positive or negative (S) Regardless of the sign of the request torque, it is judged whether the eco-switch is ON (S, S) If the request torque has a positive sign and the eco-switch is OFF, a map A is selected (S). If the eco-switch is ON, a map B which limits the maximum torque to a low value for the map A is selected (S). If the request torque has a negative sign, a map C is selected regardless of the eco-switch ON/OFF state and the maximum torque is not limited (S).

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Toyota, Japan

Masayoshi Suhama