Abstract:
PROBLEM TO BE SOLVED: To improve energy efficiency of a vehicle.SOLUTION: Request power Pe* is obtained by subtracting charging/discharging request power Pb* of a battery from a driving power Pdrv* and adding request power Ph1 of a compressor of an air conditioning device and request power Ph2 of a DC/DC converter. During traveling under a motor driving mode, when the request power Pe* is equal to or more than a threshold value Pref smaller than a starting threshold value Pstart (S190), air conditioning by the air conditioning device is stopped (S200). Thus, in comparison with a hybrid car in which air conditioning by the air conditioning device is not stopped, the request power Pe* can be suppressed from becoming equal to or more than the starting threshold value Pstart, and a start frequency of an engine can be reduced. As a result, energy efficiency of the vehicle can be improved.
Abstract:
PROBLEM TO BE SOLVED: To provide a motor drive system capable of detecting an inverter one-phase open fault. SOLUTION: A controller compares the detecting value of the DC current of a DC power supply by a current sensor and the estimate of the DC current arithmetically operated on the basis of the power incomings and outgoings of the whole motor drive system (steps S01 to S03). The controller detects the fluctuation of the DC current when a deviation between both the detecting value and the estimate exceeds a threshold (a YES decision time at the step S04). The controller decides whether the fluctuating frequency of the arithmetically operated DC current is synchronized with the rotational speed of a motor generator (the steps S06 to S08) when the fluctuating frequency of the DC current is operated arithmetically (the step S05). When the fluctuating frequency of the DC current is synchronized with the rotational speed of the motor generator in this case, the controller detects the generation of the one-phase open fault in an inverter (the steps S09 and S10). COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electric vehicle which can prevent a back-EMF generated in a motor from flowing as regeneration power to cause unintended regenerative braking. SOLUTION: A taget voltage setting section 32 sets a taget voltage VHR variably depending on variation in parameter such as inverter cooling water temperature T. A gate interception control section 36 controls gate interception and release of an inverter. The gate interception control section 36 sets the threshold number of revolutions of a motor for releasing gate interception and starting zero torque control based on the target voltage VHR. The gate interception control section 36 releases gate interception when the number of revolutions of motor MRN exceeds the threshold and an inverter control section 38 performs zero torque control. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To control degradation of an auxiliary battery mounted on an electric vehicle.SOLUTION: An electric vehicle 100 comprises a main battery MB, an auxiliary battery AB, a DC/DC converter 31, a fuse 35 and a controller 50. The DC/DC converter 31 charges the auxiliary battery AB using power supplied from the main battery MB. The fuse 35 switches between power supply from the auxiliary battery AB to an auxiliary load 30 and cut-off. When the fuse 35 is in the cut-off state, the controller 50 controls the DC/DC converter 31 so that an output voltage of the DC/DC converter 31 becomes higher than that when the fuse 35 is in the power supply state.
Abstract:
PROBLEM TO BE SOLVED: To increase a runnable distance in limp-home running as much as possible when an abnormality occurs and the limp-home running is performed in a drive system of a vehicle.SOLUTION: A vehicle 100 can run using power from a power storage device 110. The vehicle 100 includes: a display part 191 to visually notify a driver of a state of the vehicle 100; and an ECU 300 to control the display part 191. The ECU 300 runs the vehicle 100 by switching to a limp-home running mode when the abnormality of the vehicle 100 occurs. The ECU 300 displays the information concerning operations to increase a runnable distance in the limp-home running mode in the display part 191.
Abstract:
PROBLEM TO BE SOLVED: To provide a vehicle drive control system improving convenience of users when a system main relay fails. SOLUTION: The vehicle drive control system 10 includes an electric storage device 12, a system main relay part 14, a voltage converter 26, smoothing capacitors 24, 28, an inverter circuit 30, a rotating electrical machine 32, an engine 34 and a control device 50. The system main relay part 14 is constituted of a SMRG relay 16, a SMRB relay 18, a current limit resistance 22 arranged in parallel with the SMRB relay and a SMRP relay 20 connected in series. The control device 50 determines whether or not the SMRG relay 16 fails, determines temperature rise of the current limit resistance 22, connects the SMRB relay 18 with the SMRP relay 20 and when the engine 34 is started, shuts off the SMRB relay 18 and the SMRP relay 20 to allow evacuation running. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a battery temperature rise control system controlling temperature rise of a battery while protecting a component constituting a step-up/down converter circuit when charging/discharging is repeated between the battery and a smoothing capacitor through the step-up/down converter circuit. SOLUTION: In the battery temperature rise control system including the battery, the smoothing capacitor, the step-up/down converter circuit disposed between the battery and the smoothing capacitor, and a control part, the control part includes a comparison processing part for comparing a numerical value calculated based on an integrated value of the current flowing through the step-up/down converter circuit during temperature rise of the battery with a threshold set in advance in order to determine whether or not continuation of temperature rise of the battery is possible while protecting the step-up/down converter circuit, and a temperature rise processing part for controlling the temperature rise of the battery while protecting the step-up/down converter based on the result of the comparison processing part. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To judge abnormality on a stop signal stopping an operation of an inverter circuit in an inverter circuit system. SOLUTION: The inverter circuit system is provided with a load-side circuit part including a rotary electric machine and the inverter circuit, a smoothing capacitor and a control part. The control part is provided with a means outputting the stop signal for stopping the operation of the inverter circuit in the load-side circuit part to the load-side circuit part, a means for outputting a discharging signal discharging a charge of the smoothing capacitor by the operation of the inverter circuit in the load-side circuit part to the load-side circuit part although the stop signal is outputted so as to judge the abnormality on the stop signal, and an abnormality judging means judging the abnormality on the stop signal based on an inverter voltage. COPYRIGHT: (C)2011,JPO&INPIT