{'fraction_non_alphanumeric': 0.02176278563656148, 'fraction_numerical': 0.002176278563656148, 'mean_word_length': 5.7153284671532845, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
An Analytical Method for Electromagnetic Performance Calculation in Surface-Mounted Permanent-Magnet Machines with Skewing

The subdomain technique has been widely used to predict electromagnetic performance in permanent-magnet (PM) machines. Due to the high accuracy of magnetic field distribution prediction by subdomain technique, a simple method for electromagnetic performance calculation in surface-mounted PM machines with skewing is proposed. By taking the machine with step-skewed magnets as a combination of multi-machines operating with different rotor positions at the same instant, the influence of the axial magnet segments can be considered in 2D subdomain model of surface-mounted PM machines. Based on the magnetic field analytical solution, the cogging torque, back-EMF and electromagnetic torque is calculated, and the 2D multislice finite-element analysis confirms accuracy of the analytical method.