摘要:
Provided is a cost-reduced DC-DC converter for an electric automobile. This DC-DC converter is interposed between an accumulation device and a drive motor of the electric automobile for raising the electric power of the accumulation device at the power driving time of the drive motor by using a reactor, a boosting switching element and a boosting diode, and for lowering a regenerative electric power at the regenerating time of the drive motor by using the reactor, a step-down switching element and a step-down diode. The boosting switching element has a higher current allowance than that of the step-down switching element.
摘要:
A carrier frequency setting unit sets a carrier frequency based on a torque command and a motor rotation number of a motor generator. A PWM signal producing unit produces phase modulated waves corresponding to respective phase voltage commands, and produces respective phase PWM signals corresponding to a relationship in magnitude between the respective phase modulated waves and a carrier having the carrier frequency. A PWM center control unit produces a PWM center correction value for variably controlling the PWM center when the carrier frequency is lower than a predetermined frequency, and provides the same to the PWM signal producing unit.
摘要:
An inverter control device includes a DC power supply for outputting a first DC voltage, a voltage conversion unit for converting a voltage level of the DC voltage and supplying a first DC voltage to an inverter, a temperature detection unit for detecting an ambient temperature (element temperature) of the inverter, and a control device. The control device controls the voltage conversion unit such that the voltage VH lowers as the ambient temperature is lower, based on a temperature value representing a result of detection by a temperature sensor. A tolerable surge amount can thus sufficiently be ensured at a low temperature.
摘要:
An electrically powered vehicle includes: a boost converter that boosts a power supply voltage and outputs a boosted voltage; an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel; and a control device that performs control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both an accelerator and a brake are not operated to be on.
摘要:
An inverter control device includes a DC power supply for outputting a first DC voltage, a voltage conversion unit for converting a voltage level of the DC voltage and supplying a first DC voltage to an inverter, a temperature detection unit for detecting an ambient temperature (element temperature) of the inverter, and a control device. The control device controls the voltage conversion unit such that the voltage VH lowers as the ambient temperature is lower, based on a temperature value representing a result of detection by a temperature sensor. A tolerable surge amount can thus sufficiently be ensured at a low temperature.
摘要:
An electrically powered vehicle includes: a boost converter that boosts a power supply voltage and outputs a boosted voltage; an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel; and a control device that performs control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both an accelerator and a brake are not operated to be on.
摘要:
A carrier frequency setting unit (64) sets a carrier frequency (FC) according to the torque command (TR) of a motor generator and the number of motor rotations (MRN). A PWM signal generation unit (68) generates phase modulation waves corresponding to respective phase voltage commands (Vu, Vv, Vw) and generates phase PWM signals (Pu, Pv, Pw) according to the magnitude relationship between each of the phase modulation waves and a carrier wave having the carrier frequency (FC). A PWM center control unit (66), when the carrier frequency (FC) is lower than a predetermined frequency, generates a PWM center correction value (ΔCE) for variably controlling a PWM center and outputs to the PWM signal generation unit (68).
摘要:
The procedure of the invention sets a revolution speed at an efficient drive point, which is selected among drive points of an engine fulfilling a target power Pe* to be output from the engine, to a tentative revolution speed Netmp1 of the engine. The procedure also calculates a revolution speed that satisfies both a torque demand Tr* to be output to a drive shaft and a charge limit Win of a battery or an electric accumulator and sets the calculated revolution speed to a tentative revolution speed Netmp2 of the engine. The procedure sets the grater between the tentative revolution speed Netmp1 and the tentative revolution speed Netmp2 to a target revolution speed Ne* of the engine and controls the engine and two motors. This arrangement ensures output of a required braking force in response to a driver's accelerator-off action, while taking into account the charge limit of the electric accumulator.