Abstract:
A system and method for driving an electric vehicle is provided. The system has, for example, a power source generating a voltage, a voltage converter, a control system, and one or more motors for driving or propelling the vehicle. The voltage converter is configured to accept an input voltage and generate an output voltage, which is different from the input voltage. The power source provides the input voltage to the voltage converter. A switch is further provided to switch the delivery of power to the control system between a power source voltage and an increased voltage derived from the voltage converter.
Abstract:
전력 저장 장치에 전력 저장 요소와 승강압 쌍방향 초퍼 회로의 사이를 개방·단락할 수 있는 회로 절단 요소를 마련하여, 충전 과정에서 자연 방전 상태로 되는 것을 방지한다. 또, 이상 발생시에서는 전력 저장 요소를 승강압 쌍방향 초퍼 회로를 포함하는 다른 기기로부터 떼어낸다. 이것에 의해서, 전원 회생시에 있어서의 전력 저장 요소의 에너지 손실을 저감시켜 에너지의 이용 효율을 향상시킬 수 있고, 또한 이상 발생시에 전력 저장 요소가 다른 기기에 파손을 일으키게 하는 파손 영향의 발생을 방지하여 보다 안전성이 높은 전력 저장 장치를 탑재한 교류 모터 구동 장치를 얻는다.
Abstract:
An ECU (60) activates a breaking permission signal (RG) and outputs it to an AND gate (50) when a breaking signal (DWN) is inactivated. That is, when no error is detected by an error detection device (40), the ECU (60) normally activates the breaking permission signal (RG). An AND gate (50) operates AND of a signal (OVL) from the error detection device (40) and the breaking permission signal (RG) and outputs the breaking signal (DWN) to inverters (20, 30). Moreover, if a retreat travel permission signal (BLS) is activated while the breaking signal (DWN) is active, the ECU (60) inactivates the breaking permission signal (RG).
Abstract:
On end of a reactor (L 1 ) is connected to a positive electrode of a battery (B 1 ) and the other end is connected to a power line via a transistor (Q 1 ) and to the ground via a transistor (Q 2 ). By PWM control of the transistors (Q 1 , Q 2 ), an arbitrary increased voltage is obtained in the power line. It is possible to obtain an optimal inverter input voltage (power line voltage) according to the motor drive state, thereby increasing efficiency. Thus, it is possible to optimize the inverter input voltage according to the motor drive condition.
Abstract:
A control device (30) calculates an upper limit value of a duty ratio (DR_Ulim) according to a voltage (Vm) from a voltage sensor (13) and a threshold voltage (OVb) when an overvoltage is determined to have been applied to a battery (B), and determines a duty ratio (DR) for providing switching control to NPN transistors (Q1, Q2) in a range lower than the calculated upper limit value of the duty ratio (DR_Ulim). The control device (30) uses the determined duty ratio (DR) to provide switching control to the NPN transistors (Q1, Q2). Then, an up-converter (12) converts a direct current voltage (Vb) from the battery (B) into the output voltage (Vm) such that an overvoltage is not applied to the battery (B).
Abstract:
배터리 (B1) 의 양극에 리액터 (L1) 의 일단을 접속하고, 타단을 트랜지스터 (Q1) 를 통하여 전원라인, 트랜지스터 (Q2) 를 통하여 어스에 접속한다. 트랜지스터 (Q1, Q2) 의 PWM 제어에 의해 전원라인에 승압된 임의의 전압을 얻는다. 모터의 구동 상태에 맞추어 최적인 인버터 입력 전압 (전원라인 전압) 을 얻을 수 있고, 효율을 상승시킬 수 있으며, 이에 따라 모터의 구동 상황에 따라 인버터 입력 전압의 최적화를 도모할 수 있다.
Abstract:
A power supply for an electric motor includes a converter (22) that can increase and decrease a voltage supplied into an inverter (32) and then into the stator windings (36) of the motor. As a separate feature, the inverter includes a control coil (44) which is positioned within a motor housing (40) such that it may be cooled by a thermal management system (42) for the motor.
Abstract:
A power supply system includes a main power storage device (BA) and a plurality of sub power storage devices (BB1, BB2). A converters (12B) is connected to selected one of the sub power storage devices (BB1, BB2) to convert voltage between the selected sub power storage device and an electric power feeding line (PL2) bidirectionally. When a request for switching the selected sub power storage device in use is generated, upper limits on electric power input/output to/from the selected sub power storage device are continuously varied. Thus, discontinuous variation of electric power input/output to/from the power supply system during the process for switching the selected sub power storage device can be avoided. Consequently, sudden change in a behavior of an electrically powered vehicle can be avoided.