Low control frequency control method for high switching frequency inverter

A switching frequency and control frequency technology, which is applied in the field of low control frequency control of high switching frequency inverters, can solve the problems of not fully utilizing high switching frequency, current waveform distortion, etc.
CN110808704AActive Publication Date: 2020-02-18LIYANG RES INST OF SOUTHEAST UNIV +1
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LIYANG RES INST OF SOUTHEAST UNIV
Publication Date
2020-02-18

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a low control frequency control method for a high switching frequency inverter. In each switching period of a control period, the angle of the voltage vector outputted by the high-frequency inverter in a static coordinate system is rotated, the rotation angle is an angle rotated by a dq rotating coordinate system in a switching period, the angle of the output voltage vectoris compensated, and the compensation angle is an angle rotated by the dq rotating coordinate system in a half switching period; and a voltage reference vector of the next switching period in the ABCstatic coordinate system is calculated in each switching period, thereby compensating the delay one-beat characteristic of a PWM wave generator. The control method gives full play to the advantage ofhigh switching frequency, can improve the closeness degree of the output voltage vector of the inverter and the reference voltage vector, improves the sine degree of the output current of the inverter, and remarkably improves the control effect.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of inverter control, in particular to a low control frequency control method for a high switching frequency inverter. Background technique

[0002] Thanks to the development of high-frequency wide bandgap devices-silicon carbide (Silicon Carbide, SiC) devices and gallium nitride (Gallium Nitride, GaN) devices, high-frequency devices can now be used to make high switching frequency inverters (High Switching Frequency Inverter, HSFI) to deal with some occasions that require high frequency drive to improve the control effect, such as using a high switching frequency inverter to control a high frequency permanent magnet synchronous motor (High Frequency Permanent Magnet Synchronous Motor, HFPMSM) can significantly reduce the current ripple. The high switching frequency inverter made of wide bandgap devices can increase the switching frequency to hundreds of kilohertz in small and medium power applications, which is much h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More