公开(公告)号：US09590540B2

公开(公告)日：2017-03-07

申请号：US14649052

申请日：2014-01-28

Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY

Inventor： Zhiqiao Wu ,  Ajit W. Kane ,  Shreesha Adiga-Manoor

IPC: G05B11/28 ,  H02P6/00 ,  H02M1/12 ,  F02M25/08

CPC classification number: H02P6/28 ,  F02M25/0836 ,  H02M1/12

Abstract: A system or method controlling a variable speed drive based on PWM techniques, wherein a first PWM method is used when the input current is less than a predetermined threshold value, for higher efficiency and lower total harmonic distortion (THD); and a second PWM method comprising a discontinuous modulation signal is used when the input current is greater than the predetermined threshold value for higher efficiency. By doing so, the maximum efficiency of VSD within the whole operation range can be achieved.

Abstract translation: 一种基于PWM技术控制变速驱动器的系统或方法，其中当输入电流小于预定阈值时使用第一PWM方法，以实现更高的效率和更低的总谐波失真（THD）; 并且当输入电流大于预定阈值以便更高效率时，使用包括不连续调制信号的第二PWM方法。 通过这样做，可以实现整个操作范围内VSD的最大效率。