{'fraction_non_alphanumeric': 0.016985138004246284, 'fraction_numerical': 0.0, 'mean_word_length': 5.293333333333333, '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}}
Kiln drives: past, present and future

Historically, DC motor drives have been the most economic solution for cement kiln applications. AC drive technology continues to become more cost competitive, resulting in a trend towards AC kiln drives. Here, the author describes how several factors related to the mechanical characteristics of the kiln and the electrical characteristics of the drive will determine the present optimal drive package for a given kiln application.