Abstract:
Ansteuerung einer elektrischen Maschine mit einem Wechsel zwischen zeitsynchroner PWM-Taktung und winkelsynchroner Blocktaktung. Es wird vorgeschlagen, für den Übergang eine winkelsynchrone Taktung mit einstellbarer Spannungszeigerlänge vorzusehen. Auf diese Weise können Sprünge im Betriebsverhalten der elektrischen Maschine bei einem Wechsel zwischen zeitsynchroner Taktung und winkelsynchroner Taktung minimiert oder gegebenenfalls ganz verhindert werden.
Abstract:
In a hybrid vehicle, noise occurrence caused in a rectangular wave control of a motor is restricted when a motor running mode is selected with a converter boosting limit applied. A motor controller for a hybrid vehicle mounted with an internal combustion engine and a motor as power sources is provided. The motor controller includes a converter capable of boosting a voltage supplied from a power supply device; an inverter which converts an output voltage of the converter to an AC voltage and applies the AC voltage to the motor; and a control unit which controls the inverter to drive the motor by switching between two or more control modes. When a running mode to drive the vehicle by a motor power alone is selected with a boost limit applied to the output voltage of the converter and when the motor is driven in a rectangular wave control mode or an overmodulation PWM control mode, the control unit raises the output voltage of the converter higher than a boost limit value and controls the inverter such that the control mode is switched to drive the motor in a sinusoidal PWM control mode.
Abstract:
The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases and a cylindrical outer rotor. This structure minimizes torque ripple and maximizes energy efficiently. All coil windings are wound around the stator teeth. Several winding configurations are proposed and a special one with only one coil per slot. The motor phases are supplied by alternating rectangular current waveforms. A specific inverter control system is described to maximize efficiency and reduce current ripple and electromagnetic interference under motorizing or generating operations. The current control is realized by using the mosfets voltage for the current measurement.
Abstract:
A work machine (100) includes a frame (110), a traction system (120) supporting the frame (110), a power source (130) mounted on the frame (110), a switched reluctance motor (205), an inverter (220) configured to control power to the motor (205) from a power source (130), and a controller (210). The controller (210) is configured to receive a signal indicating a desired torque (430) and determine if the desired torque (430) is between an upper threshold (410) and a lower threshold (420). If the desired torque (430) is between the upper threshold (410) and the lower threshold (420), pulse width modulation is used to produce a PWM adjusted torque command (450), and the motor (205) is commanded based on the PWM adjusted torque command (450). The PWM adjusted torque command (450) is configured to cycle between the upper threshold (410) and the lower threshold (420) to produce the desired torque (430).
Abstract:
A vehicle propulsion system includes an air heating chamber that receives inlet air from an air intake chamber and provides thrust through an exhaust chamber. A battery powered pulse generator generates a pulsed electrical output signal. An amplifier amplifies the pulsed electrical output signal to provide an amplified pulsed power output signal to the air heating chamber. The amplified pulsed power output signal directly heats the inlet air to generate thrust through the exhaust chamber.
Abstract:
In an electrically powered vehicle, a computer-controlled switching system activates relays to switch additional discrete batteries into a circuit in response to throttle level, where a processor is configured to decide what specific batteries should be present in the circuit at any given time, in response to both throttle level and a battery load balancing optimization scheme.
Abstract:
A traction control system for a vehicle having a first wheel driven by a first electric motor, wherein the first electric motor includes a first set of coil windings, the traction control system comprising a first controller arranged to control current in the first set of coil windings for generating a drive torque for driving the first wheel, and a second controller arranged to determine a maximum wheel velocity based on a first slip ratio value for the first wheel and the vehicle velocity and a minimum wheel velocity based on a second slip ratio value for the first wheel and the vehicle velocity, wherein the second controller is arranged to communicate to the first controller the maximum wheel velocity and minimum wheel velocity values and a torque demand value corresponding to a drive torque for driving the first wheel, wherein the first controller is arranged to control current in the first set of coil windings to generate a drive torque based on the maximum wheel velocity, the minimum wheel velocity values and the torque demand value received from the second controller.
Abstract:
Die Erfindung betrifft ein Verfahren zur Steuerung eines elektrischen Antriebs eines Kraftfahrzeuges mittels eines Steuerungssystems (1), wobei das Steuerungssystem (1) eine Ausfallsicherungssteuerung an einer Leistungselektronik (2) einer elektrischen Maschine (3) des Antriebs durchführt, indem ein Initialsystem (4) des Steue- rungssystems (1) in einem ersten Betriebszustand und ein Rückfallsystem (5) des Steuerungssystems (1), das hinsichtlich seines Steuerungsschemas gegenüber dem Initialsystem (4) vereinfacht ausgebildet ist, in einem zweiten Betriebszustand die elektrische Maschine (3) über die Leistungselektronik (2) steuert. Zudem betrifft die Erfindung ein Computerprogrammprodukt, das dazu ausgelegt ist, dieses Verfahren durchzuführen.
Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben eines Stromrichters (8), insbesondere einer elektrischen Maschine (2), bei dem für den oder jeden Halbleiterschalter (22) des Stromrichters (8) ein Steuersignal (P') zur Einstellung einer Abschaltgeschwindigkeit (A neu ) erzeugt wird, wobei eine elektrische Zwischenkreisspannung (U dc ) eines Zwischenkreises (10) erfasst und mit einem Spannungsschwellwert (U thresh ) verglichen wird, wobei eine Betriebstemperatur (T B ) des jeweiligen Halbleiterschalters (22) erfasst und mit einem Temperaturschwellwert (T thresh ) verglichen wird, wobei ein mittels des jeweiligen Halbleiterschalters (22) geschalteter Laststrom (I c ) erfasst und mit einem Stromschwellwert (I thresh ) verglichen wird, und wobei das Steuersignal (P') zur Einstellung der Abschaltgeschwindigkeit (A neu ) in Abhängigkeit der Vergleiche erzeugt wird.
Abstract translation:
本发明涉及一种用于操作功率转换器(8),特别是电机(2)其中,f导航用途r为转换器(8)的控制信号的所述或每个半导体开关(22)(P “)(用于设定关断速度的<子>其中的电中间电路电压(U <子>直流子>)的中间电路(10)生成新的子>检测),和一个电压阈值(U <子> THRESH 子>)进行比较,检测所述各个半导体开关(22)和操作温度(T <子>乙子>)(与温度阈值T <子>脱粒子>)进行比较,其中,一个 通过相应的半导体开关的装置(22)连接在所述负载电流(I C 子>)被检测和电流阈值(I 脱粒子>)进行比较,并且其中,所述控制信号(P“),用于调节 根据比较结果生成关闭速度(A new sub>)。 P>
Abstract:
The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases and a cylindrical outer rotor. This structure minimizes torque ripple and maximizes energy efficiently. All coil windings are wound around the stator teeth. Several winding configurations are proposed and a special one with only one coil per slot. The motor phases are supplied by alternating rectangular current waveforms. A specific inverter control system is described to maximize efficiency and reduce current ripple and electromagnetic interference under motorizing or generating operations. The current control is realized by using the mosfets voltage for the current measurement.