Abstract:
A control device measures a voltage drop across a conductor in a generator to determine and control the total generator output current. A temperature of the conductor is also measured to improve the accuracy. The control device may further improve on the accuracy by compensating for the electrical current through a field coil that may power the generator. The control device may be used in combination with a generator in a vehicle electrical system. Other system parameters may be monitored to improve on the system monitoring, diagnostics, and control. The generator may include a conductor comprising a process-controlled geometric shape.
Abstract:
The invention relates to a control and power module (10) for a rotating electrical machine (30), said module comprising: a power circuit (15) containing a number of branches (Ba, Bb, Bc), and; a control circuit (13) designed for controlling the power circuit (15) when the machine operates in a nominal mode. The inventive module is characterized in that the control circuit (13) is also designed for: monitoring an output voltage (Ubat) from the power circuit (15); blocking at least one branch of the power circuit (15) in a conduction state when said output voltage (Ubat) reaches an at least first threshold value (US1) so that the machine functions in a degraded mode. The invention is for use in an alternator starter.
Abstract:
A generator controller (4) is provided which is able to detect and respond to failure of a generator output voltage sensor, whilst being able to distinguish voltage sensor failure from output voltage collapse due to the presence of an overload or short circuit condition. The presence of a voltage sensor failure is indicated by the measured output voltage being below a first voltage threshold whilst the output current is also below a current threshold.
Abstract:
The control device for an alterno-starter comprises a transistor bridge (MHS, MHL), whereby each transistor has a grid, and an electronic unit provided with devices for controlling the grids of the transistors, arranged in pairs, in a branch (T) of the bridge, controlled by at least one control device (100), said branch being connected to a ground line (35) and a positive line, also comprising a device (40) which offers protection against overvoltages and which is connected to a control device (100) and which is configured to enable one of the transistors of the branch to be conductive when the potential of the positive line exceeds a determined or pre-determined value which is lower than the maximum acceptable voltage for said unit.
Abstract:
A method for improving vehicle battery state-of-charge (SOC) for initial vehicle customer delivery is disclosed. The method is focused on vehicle assembly plant practices and ensuring that battery discharge is minimized or eliminated during the vehicle assembly process. The method includes determining the available maximum percentage of duty cycle voltage output from the vehicle alternator and determining a minimum idle boost speed necessary to provide minimum discharge or positive charge to the battery when the vehicle’s accessories are in the “on” state during vehicle assembly. The method further includes programming the vehicle’s controllers to force the maximum percentage of duty cycle voltage output available and the minimum idle speed necessary to provide minimum battery discharge or positive charge during the earliest part of the vehicle life (3).
Abstract:
A ground fault detection system is provided where one current sensor is used to calibrate a second sensor in order to provide automatic zeroing of the difference measurement. The calibration is done gradually in order to differentiate between sensor drift and a transition in current due to a differential fault.
Abstract:
A load dump protection circuit (100) includes a switch (M1), a clamp circuit (D1-D3) and a comparator (U1). The clamp circuit (D1-D3) is coupled between a power supply line and a first output terminal of the switch (M1). A second output terminal of the switch (M1) is coupled to a common return. An output of the comparator (U1) is coupled to a control terminal of the switch (M1). A first input of the comparator (U1) monitors a magnitude of a trigger signal on the power supply line. The switch (M1) provides a low impedance path between the first and second output terminals, when a magnitude of the trigger signal increases above a magnitude of a reference signal on a second input of the comparator (U1). The switch (M1) provides a high impedance path between the first and second output terminals, when the magnitude of the trigger signal decreases below a shut-off level that is less than the reference signal.
Abstract:
The invention relates to Method of operating a wind turbine, wherein rotor windings of an induction generator, which comprises stator coils coupled to a voltage grid, fed with rotor currents by a feed-in unit are driven by a rotor of the wind turbine; wherein the frequencies of the fed-in rotor currents are controlled depending on the rotor rotation frequency and the feed-in unit is electrically decoupled from the rotor windings in the case predetermined variations of the grid voltage amplitude and the rotor current feed-in is resumed after the decoupling caused by the variation of the grid voltage amplitude, when the currents generated in the rotor windings by the variation have declined to a predetermined value.
Abstract:
Ein Generator zur Erzeugung hoher Spannungen mit wenigstens einer Generatorwicklung (12) ist über eine Generatorschaltung (10) an ein Netz (19) angeschlossen, die Mittel (15,..,17) zum Schutz gegen Ueberspannungen umfasst. Ein verbesserter Schutz bei höheren Spannungen wird dadurch erreicht, dass die wenigstens eine Generatorwicklung (12) in eine Mehrzahl von Wicklungsabschnitten (12a-c) unterteilt ist, welche hinsichtlich der Isolationsbemessung ihrer Wicklungsisolation abgestuft ausgebildet sind, und dass die Ueberspannungsschutzmittel eine Mehrzahl von Ueberspannungsschutzelementen (15,..17) umfassen, die jeweils den einzelnen Wicklungsabschnitten (12a-c) zugeordnet sind und in ihrem Ansprechniveau an die Anforderungen des zugehörigen Wicklungsabschnittes angepasst sind.