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. 모터 구동 제어 장치, 컨버터, 인버터, 리액터, 스위칭 소자.
Abstract:
In the case where DC power from a DC power supply is converted to AC power by an inverter and supplied to an AC motor, a power compensator is connected in parallel with a DC power input portion of the inverter, and a control device of the power compensator charges/discharges a power storage device to perform a power compensation process A when power demand for the AC motor exceeds a predetermined value, and takes into account power allowance which can be inputted and outputted from the DC power supply to the power storage device and performs a power storage adjustment process B of performing auxiliary charge of the power storage device within the range of the power allowance when the power compensation process A is unnecessary.
Abstract:
제어 수단(7)은, 회전 정보 검출 수단(6)에 의해 검출되는 동기기(5)의 회전 정보에 근거하여, 타행 운전으로 이행할 때에는 콘덴서(3)의 충전 전압 Vc가 동기기(5)가 발생하는 유기 전압 Vm 이상으로 되도록 컨버터(2)에서 승압하고, 타행 중은 상기 충전 전압 Vc를 유지함과 아울러, 타행 운전으로부터 역행 운전 또는 회생 운전으로 이행할 때는, 동기기(5)가 발생하는 유기 전압 Vm이 직류 전압 Vdc보다 낮은 값으로 되도록 약계자 제어를 행한다.
Abstract:
An electronically commutated fan system (100) includes an alternating-current-to-direct-current conversion unit (10), an inverter unit (20) and a control unit (30). The alternating-current-to-direct-current conversion unit (10) converts an alternating-current input power source (Viac) into a first direct-current power source (Vdcl). The inverter unit (20) is electrically connected between the alternating-current-to-direct-current conversion unit (10) and a fan (40). The inverter unit (20) converts the first direct-current power source (Vdcl) into an alternating-current output power source (Voac) and provides the alternating-current output power source (Voac) to the fan (40) to rotate. The control unit (30) is electrically connected to the alternating-current-to-direct-current conversion unit (10) and the inverter unit (20). The control unit (30) controls the alternating-current-to-direct-current conversion unit (10) and the inverter unit (20) to adjust a rotational speed of the fan (40). When the control unit (30) detects a power variation of the alternating-current input power source (Viac), the control unit (30) controls the rotational speed of the fan (40) to be maintained within a first error range (Rel).
Abstract:
A motor driving device is disclosed. The motor driving device includes: a rectifier rectifying alternating current (AC) power into direct current (DC) power to output an input voltage; a first buck-boost converter including a plurality of switches for converting the input voltage and having a buck mode of stepping down the input voltage and a boost mode of stepping up the input voltage; an inverter converting a DC-link voltage transformed from the first buck-boost converter into an AC voltage and transferring the AC voltage to a motor; and a controller receiving motor information related to driving of the motor, comparing magnitudes of a desired DC-link voltage depending on the received motor information and the input voltage with each other, and performing a control to switch only any one of the plurality of switches so that the first buck-boost converter is operated in the buck mode or the boost mode.
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.
Abstract:
The present invention provides an automotive electric power supply system that can prevent deterioration in electric power supply capacity due to discharging of a main electric power source, that can prevent large currents flowing from the main electric power source to a capacitor when a switch is closed, and that can achieve high-flux, high-output power generation. The main electric power source is connected to a lower-voltage side of a DC/DC converter by means of a first switch, and an electrical double-layer capacitor and a regulator circuit is connected to a higher-voltage side of the DC/DC converter. In addition, permanent magnets are disposed on a rotor so as to generate a magnetic field that is in a reverse direction to excitation by a field coil inside a claw-shaped magnetic pole portion of the rotor. A power supply control circuit controls opening and closing of the first switch so as to be in an open state when the engine is at rest, and so as to be set to a connected state after the regulator circuit is operated to make the alternator generate electric power to precharge the electrical double-layer capacitor after the engine is started.
Abstract:
Based on rotation information of a synchronous machine (5) detected by rotation information detection means (6), control means (7) cause a converter (2) to boost a charge voltage Vc of a capacitor (3) so as to be higher than an induced voltage Vm generated by the synchronous machine (5) at the time of shifting to a coasting operation, maintain the charge voltage (Vc) during the coasting operation, and perform a weak field control so that the induced voltage (Vm) generated by the synchronous machine (5) becomes lower than a DC voltage (Vdc) at the time of shifting from the coasting operation to a power running operation or to a regenerative operation.
Abstract:
A power supply apparatus for a vehicle includes first and second batteries (B1, B2) provided electrically in parallel to main loads (14, 22), a boost converter (12A) provided between the first battery (B1) and the main loads, a boost converter (12B) provided between the second battery (B2) and the main loads, an auxiliary battery (B3), a DC/DC converter (33), and an auxiliary load (35) driven by power from the auxiliary battery (B3) or DC/DC converter (33). The controller (30) determines charging currents or discharging currents for the batteries (B1, B2) reflecting variations in a current flowing through the auxiliary load (35). Accordingly, a power supply apparatus for a vehicle can thus be provided in which imbalance between charging/discharging currents for a plurality of power storage devices is reduced.
Abstract:
A novel vehicle circuit system is supplied with electrical energy by a starter/generator which functions normally as a generator and can be used as a starter for starting. The starter/generator is connected to a 24 volt ring main system and to a 24 volt battery by pulse rectifiers, a 300 volt d.c. intermediate circuit, and a bidirectional transformer. Other consumers, as well as electric control devices, are supplied with voltages greater than 24 volts by the bidirectional push-pull transformer or the 300 volt d.c. intermediate circuit, if necessary via other transformers. This vehicle circuit system also contains a socket with a 220 volt 50 Hz power supply.