Patent application number | Description | Published |
20090212746 | Systems and Methods for Optimizing the Operation of a Generator - Methods and systems for minimizing power loss in generator are disclosed, including providing one or more operating parameters for a generator, and determining an optimal field power and an optimal phase angle, where the optimal field power and the optimal phase angle substantially minimize a power loss in operating the generator at the one or more operating parameters. | 08-27-2009 |
20090251089 | Systems and Methods for Detecting Angular Position - Methods and systems for detecting an angular position of an electric motor are disclosed, including sending an electrical pulse through a stator coil of the electric motor, determining an approximate angular position of a rotor of the electric motor in response to detecting an timing of a returning electrical pulse from the stator coil, the timing of the returning electrical pulse being indicative of the angular position of the rotor; and determining an accurate position of the rotor in response to sensing a transition of a digital sensor in response to the rotor rotating relative to the stator, the transition being indicative of the accurate position. | 10-08-2009 |
20090254301 | Systems and Methods for Detecting Angular Position - Methods and systems for detecting an angular position of a rotating device are disclosed, including sensing and counting high-resolution transitions of a high-resolution digital sensor in response to the rotating device rotating; sensing low-resolution transitions of a low-resolution digital sensor in response to the rotating device rotating, the low-resolutions transitions being spaced apart at uneven angles; determining an angular position of the rotating device in response to determining a number of high-resolution transitions between pairs of low-resolution transitions. | 10-08-2009 |
20100194192 | Automotive Electrical System Configuration - Disclosed herein are a variety of different electrical system topologies intended to mitigate the impact of large intermittent loads on a 12 volt vehicle power distribution system. In some embodiments the intermittent load is disconnected from the remainder of the system and the voltage supplied to this load is allowed to fluctuate. In other embodiments, the voltage to critical loads is regulated independently of the voltage supplied to the remainder of the system. The different topologies described can be grouped into three categories, each corresponding to a different solution technique. One approach is to regulate the voltage to the critical loads. A second approach is to isolate the intermittent load that causes the drop in system voltage. The third approach is to use a different type of alternator that has a faster response than the conventional Lundell wound field machine. | 08-05-2010 |
20110089928 | DIGITALLY CONTROLLING A POWER CONVERTER - Methods and systems for power conversion are disclosed, including receiving at least one interrupt indicative of a transient power condition of the power converter and switching the processor to operate in a second mode from a first mode responsive to the interrupt. The switching enables the processor to allocate greater resources to process a power output parameter of the power converter operating in the transient power condition compared to resources allocated by the processor operating in the first mode to process the power output parameter. | 04-21-2011 |
20110248658 | APPARATUS AND METHOD FOR DETERMINING ANGULAR POSITION - The position of a rotor of a motor is determined. The motor includes the rotor and a stator and the stator includes a plurality of coils. The rotor further includes at least one rotating magnetic field device. When the rotor is moving below a threshold speed, the current in each of the plurality of coils of the stator is measured. A pre-programmed data structure is accessed. The pre-programmed data structure stores a plurality of stator currents associated with a plurality of predetermined rotor positions. A first absolute position of the rotor is determined from the data structure according to the measured current from each of the plurality of coils. When the rotor is moving above the threshold speed, one or more rising or falling edges of magnetic field strength associated with the at least one rotating magnetic field device of the rotor are sensed. At least one timing aspect of the rising and falling edges of magnetic field strength are compared to determine a second absolute position of the rotor. | 10-13-2011 |
20120235674 | DETECTING ANGULAR POSITION OF A ROTATING DEVICE - An angular position of a rotating device is detected by sensing and counting high-resolution transitions of high-resolution digital sensors in response to the rotating device rotating; sensing low-resolution transitions of a low-resolution digital sensor in response to the rotating device rotating, the low-resolutions transitions being unevenly spaced apart; determining an angular position of the rotating device in response to determining a number of high-resolution transitions between pairs of low-resolution transitions. | 09-20-2012 |
20120261984 | Automotive Electrical System Configuration - Disclosed herein are a variety of different electrical system topologies intended to mitigate the impact of large intermittent loads on a | 10-18-2012 |