4 results about "Ac machine" patented technology

A method for controlling the tool face angle of a rotary steerable system inside a well. The tool face angle is mainly controlled through the determination of the duty cycle of an AC Machine, producing its torque. The controlling duty cycle of the AC Machine is determined through the summing of a duty cycle set point with one or more duty cycle corrective values, using a Pulse Width Modulation technique. The duty cycle corrective values use different cut-off frequencies and update frequencies to accommodate the non-linearity and asymmetry of the system response. The method can also be used for controlling the angular rate of the rotary steerable system.

The application relates to the technical field of computer-aided design and manufacturing, and provides a numerical control machining track post-processing calculation method and device and a storage medium, which are aimed at post-processing calculation of a support end track of a numerical control machining track of a whole box bottom hybrid parallel-serial mechanism mirror milling device, consider mechanical structures and rotary limiting ranges of a five-axis AC machining end and a virtual five-axis BA support end of the hybrid parallel-serial mechanism, and can realize the synchronism of the support end numerical control track; according to the requirement of angle calculation of existing five-axis program post-processing, the method is provided for incremental angle calculation by using a projection algorithm, the calculation efficiency and angle judgment accuracy can be effectively improved, and the program synchronism of the parallel mirror image device is ensured.