摘要:
Embodiments of the present application provide a battery heating method, a charging device, and a battery management system, which can effectively heat a power battery. The method is performed by a charging device, the method including: receiving first instruction information from a control device of a power battery before the charging device charges the power battery, where the first instruction information is used to instruct the charging device to heat the power battery; and heating the power battery according to the first instruction information.
摘要:
Die Erfindung betrifft eine Umrichteranordnung (1) mit einem Umrichter (3), der wechselspannungsseitig mit einem Wechselspannungsnetz (2) und gleichspannungsseitig mit einer Speicheranordnung (8) verbindbar ist. Die Erfindung ist dadurch gekennzeichnet, dass der Umrichter eine Mehrzahl von Umrichterarmen aufweist, die jeweils eine Reihenschaltung von Halbleiterschaltmodulen (7) aufweisen, und die Speicheranordnung in Parallelschaltung zu wenigstens einem der Umrichterarme angeordnet ist, wobei die Speicheranordnung eine Vielzahl von Reihenschaltungen von einzelnen Energiespeichermodulen (23a1-nm) umfasst, wobei jede Reihenschaltung sich zwischen einer ersten und einer zweiten Gleichspannungssammelschiene erstreckt, so dass die Reihenschaltungen zueinander parallel geschaltet sind, wobei die Umrichteranordnung ferner eine Balancierungsvorrichtung (27) zum Balancieren von Energiespeichermodulspannungen der Energiespeichermodule umfasst, wobei die Balancierungsvorrichtung Balancierungsleitungen (27a, b) umfasst, die einzelne Energiespeichermodule unterschiedlicher Reihenschaltungen miteinander verbinden.
摘要:
Some embodiments are directed to a three-phase power converter for converting power between a power grid network and a battery that includes a three-phase grid transformer, a three-phase switching converter for coupling to a positive terminal of the battery, a first, second and third series inductors coupled between the three-phase grid transformer and the three-phase switching converter, a control circuit configured for controlling a first, second and third phase differences between first, second and third time-periodical power grid voltage signals provided by the grid transformer and first, second and third converter time-periodical voltage signals provided to the switching converter such that the first, second and third time-periodical power grid voltage signals and first, second and third converter time-periodical currents are in phase. The three-phase grid transformer provides electrical isolation between the power grid network and the battery.
摘要:
The present invention relates to a single phase, non-insulated, miniaturized DC/AC power inverter (1) having an output power density higher than 3000 W/dm3, wherein said first (S1_H), second (S1_L), third (S2_H) and fourth (S2_L) switches are made of wide-band semiconductors and preferably of gallium nitride or GaN semiconductors; and wherein said DC/AC power inverter (1) further comprises: a ripple-compensating active filter comprising a third half-bridge (203) having a fifth switch (S3_H) in series with a sixth switch (S3_L), said fifth switch (S3_H) being connected at one end to the positive terminal (L+) of the DC input, said sixth switch (S3_L) being connected at one end to the negative terminal (L−) of the DC input,the other end of the fifth switch (S3_H) being connected to the other end of the sixth switch (S3_L), defining a third common end, said third common end being connected to a first end of a LC filter, made of at least one inductor (L6) and one storage capacitor (C5), a second end of the LC filter being connected to the negative terminal (L−); modulation control means of said first (S1_H), second (S1_L), third (S2_H), fourth (S2_L), fifth (S3_H) and sixth (S3_L) switches for providing a switch frequency comprised between 20 and 500 kHz and allowing variable phase shifts between any two of said first (201), second (202) and third (203) half-bridges and allowing dead time modulation of the switches of said half-bridges (201, 202, 203), so that to obtain a switching approaching ZVS switching, in particular to obtain switching when current crosses through zero and further to cancel switching losses and so that to allow high peak-to-peak voltage variations in the active filter, while storing corresponding energy in the storage capacitors (C5), wherein the Y-capacitors of the common mode noise filter (100), are referenced to a shielding being at a reference potential, said shielding being insulated from earth, said Y-capacitors having a value comprised between 100 nF and several μF.
摘要:
An MMC (110) includes arms (A1 to A6) each configured with one unit converter or a plurality of cells (10) connected in series. The main circuit of the cell (10) includes a switching element and a DC capacitor. The control circuit of the cell (10) transmits a voltage detected value of the DC capacitor to a control device (120) and controls on/off of the switching element in accordance with a control signal received from the control device (120). When the voltage detected value of at least one cell (10) exceeds a first threshold voltage, the control device (120) transmits a gate block signal to the control circuit of each cell (10). The control circuit of each cell (10) autonomously fixes the switching element of its own main circuit to an off state and short-circuits the output terminals of the main circuit, irrespective of the control signal, when its own voltage detected value exceeds a second threshold voltage higher than the first threshold voltage.
摘要:
Some embodiments are directed to an AC/DC converter comprising a first AC terminal for connection to a first AC circuit terminal, a neutral line terminal for connection to a neutral AC circuit terminal, a common node, a first AC side active bridge coupled between the first AC terminal and the common node, and a neutral voltage lift capacitor coupled between the neutral line terminal and the common node. The converter comprises first and second DC terminals, and a capacitor between the first and second terminals. A DC-side active bridge is coupled between the first and second terminals. An inductor is coupled between a switchable nodes of the first AC side active bridge and the DC side active bridge. A controller is arranged to control the first AC side active bridge and the DC-side active bridge so to alternate voltage across the first AC terminal and the neutral line terminal.
摘要:
Ein Umrichter (12) für eine elektrische Maschine (14) umfasst mehrere Phasenleitungen (16) zum Anschluss der elektrischen Maschine (14), wobei der Umrichter (12) je Phasenleitung (16) eine Halbbrücke (21, 22) mit je einem ersten (41) und je einem zweiten (42) Halbleiterschalter aufweist, wobei der erste Halbleiterschalter (41) dazu vorbereitet ist, zumindest eine der Phasenleitungen (16) zeitweise mit einer ersten Versorgungsleitung (31) des Umrichters (12) elektrisch zu verbinden und der zweite Halbleiterschalter (42) dazu vorbereitet ist, die Phasenleitung (16) zeitweise mit einer zweiten Versorgungsleitung (32) des Umrichters (12) elektrisch zu verbinden. Der Umrichter (12) ist dazu vorbereitet, in einem ersten Energierückgewinnungsbegrenzungsmodus (ERM1) betrieben zu werden, in dem zumindest zeitweise mindestens zwei der ersten Halbleiterschalter (41) gleichzeitig leitend geschaltet sind.
摘要:
An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the. A load-leveling unit (LLU) is selectively coupled with a DC power output from the starter/generator and has an inverter/converter/controller (ICC) with an LLU metal oxide semiconductor field effect transistor (MOSFET)-based bridge configuration that supplies DC power to the DC power output in a supply mode, and that receives DC power from the DC power output, in a receive mode. A LLU bridge gate driver is configured to drive the LLU MOSFET-based bridge during a supply mode and a receive mode using bi-polar pulse width modulation (PWM).