MOTOR CONTROLLER

• Main Author: SUMASU HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 04.07.2019
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL OR REGULATION THEREOF; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To provide a motor controller capable of suppressing heat generation of a drive circuit.SOLUTION: A motor controller 31 comprises: PWM count calculation means 46 for calculating a PWM count in units of a current control period of each phase for each current control period; PWM count setting means 47 for setting a PWM count in units of the current control period of each phase for the current control period as the PWM count in units of a PWM period relative to each PWM period in the current control period in a corresponding phase; and PWM count changing means 47 for changing the PWM count in units of a PWM period of at least one phase of the PWM counts in unit of the PWM period of each phase set by the PWM count setting means in the current control period such that the number of switching of a switching element corresponding to the phase is reduced without changing a total value in the current control period.SELECTED DRAWING: Figure 2 【課題】駆動回路の発熱を抑制することができるモータ制御装置を提供する。【解決手段】モータ制御装置３１は、電流制御周期毎に、各相の電流制御周期単位のＰＷＭカウントを演算するＰＷＭカウント演算手段４６と、電流制御周期に対する各相の電流制御周期単位のＰＷＭカウントを、対応する相における当該電流制御周期内の各ＰＷＭ周期に対するＰＷＭ周期単位のＰＷＭカウントとして設定するＰＷＭカウント設定手段４７と、電流制御周期において、ＰＷＭカウント設定手段によって設定された各相のＰＷＭ周期単位のＰＷＭカウントうち少なくとも１つの相のＰＷＭ周期単位のＰＷＭカウントを、当該電流制御周期内での合計値を変更することなく、当該相に対応するスイッチング素子のスイッチング回数が低減するように変更するＰＷＭカウント変更手段４７とを含む。【選択図】図２