Control unit for non-circulating current type cycloconverter

摘要: The invention relates to a control unit continuous cycloconverter of the non-circulating current type which performs frequency conversion an AC power source using semiconductor element perform commutation by and variable speed operation motor. Sine/cosine waves as secondary magnetic flux directional signals are obtained sine/cosine wave generator based on slip phase rotor motor; deviation between torque set value supplied from controller feedback is outputted voltage adjusted element, exciting element; values converted into alternating parameters, also parameters; circuit alternately operate switching elements positive negative groups constitute cycloconverter, amplitude error produced drive actually motor can be reduced significantly.