Abstract: An electric drive for a vehicle uses an inverter circuit configured to provide a multi-phase AC drive signal to an electric machine according to a PWM drive signal. A PWM controller monitors an operating point of the electric drive and is configured to identify an operating region of the electric drive from a plurality of predetermined regions in response to the monitored operating point. A sequence memory stores a plurality of sequences, each sequence optimized for a respective one of the predetermined regions to reduce audible noise and switching losses. The PWM controller generates the PWM drive signal according to a respective sequence corresponding to the identified operating region. Thus, the reduction of audible noise and switching losses is optimized based on torque and/or speed of the motor.

Abstract: An electric drive for a vehicle uses an inverter circuit configured to provide a multi-phase AC drive signal to an electric machine according to a PWM drive signal. A PWM controller monitors an operating point of the electric drive and is configured to identify an operating region of the electric drive from a plurality of predetermined regions in response to the monitored operating point. A sequence memory stores a plurality of sequences, each sequence optimized for a respective one of the predetermined regions to reduce audible noise and switching losses. The PWM controller generates the PWM drive signal according to a respective sequence corresponding to the identified operating region. Thus, the reduction of audible noise and switching losses is optimized based on torque and/or speed of the motor.

Abstract: The present invention provides methods for facilitating the sharing of data structures in a software application written using both a high level programming language and assembly language. Methods are provided for defining a data structure in an assembly language program such that the data structure is created in exact conformance to the physical and logical memory layout mandated for a comparable data structure by a compiler for a high level language. Such methods comprise providing assembly language directives that cause the assembler to automatically adapt a data structure definition to the alignment constraints imposed by the high level language compiler.

Abstract: The present invention provides methods for facilitating the sharing of data structures in a software application written using both a high level programming language and assembly language. Methods are provided for defining a data structure in an assembly language program such that the data structure is created in exact conformance to the physical and logical memory layout mandated for a comparable data structure by a compiler for a high level language. Such methods comprise providing assembly language directives that cause the assembler to automatically adapt a data structure definition to the alignment constraints imposed by the high level language compiler.