Method for realizing digital signal processor (DSP) control over intermediate frequency single-phase generator inverter

A technology of a single-phase generator and an implementation method, which is applied to the starter, motor generator/starter, etc. of a single single-phase induction motor, and can solve problems such as the failure of the motor to start normally and current distortion.

Active Publication Date: 2012-05-02
FUZHOU UNIV +1
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Although the current can be clipped through the function of the current limiting pro...

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  • Method for realizing digital signal processor (DSP) control over intermediate frequency single-phase generator inverter
  • Method for realizing digital signal processor (DSP) control over intermediate frequency single-phase generator inverter
  • Method for realizing digital signal processor (DSP) control over intermediate frequency single-phase generator inverter

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] The invention provides a method for realizing DSP control of an intermediate frequency single-phase generator inverter, which is characterized in that: by detecting the current value of the inverter in the process of starting the motor, an interrupt signal is generated to make the DSP control software of the system Transfer to an interrupt subroutine; the interrupt subroutine first forces the IGBT device of the system to close, and clears the PWM sampling point sequence number of the system and marks the motor at this time as the load in the starting state, and then deeply lowers the PWM of the system. degree of modulation M . Continue to dynamically adjust according to the magnitude of the starting current after the interrupt subroutine ends and returns to the main program M , so that the adjusted output voltage of the inverter is adapted to t...

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Abstract

The invention relates to a method for realizing digital signal processor (DSP) control over an intermediate frequency single-phase generator inverter. The method is characterized by comprising the following steps that: the DSP control software of a system turns into an interrupt subprogram by detecting a current value of the inverter in a motor starting process to generate an interrupt signal; the interrupt subprogram forcibly switches off an insulated gate bipolar transistor (IGBT) device of the system, clears pulse width modulation (PWM) sampling point sequence numbers of the system, marks a current load as a motor in a started state, and deeply down-regulates the modulation degree M of a PWM of the system; and after finishing the interrupt subprogram and returning to a main program, the DSP control software continues dynamically regulating the M according to the magnitude of starting current to make the output voltage of the regulated inverter adapted to the capacity of the started motor, so that the motor can be ensured to maximally obtain the starting current on the premise of safety of the IGBT device when the motor is started.

Description

technical field [0001] The invention relates to the field of inverter DSP control, in particular to a method for realizing DSP control of an intermediate frequency single-phase generator inverter. Background technique [0002] The medium frequency inverter generator system has become the development direction of the motor industry because of its advantages of portability and energy saving. In the process of inverting intermediate frequency AC power into 50 / 60HZ power frequency power, PWM inverter technology must be relied on. The PWM pulse signal is generated by the microprocessor in real time to drive the IGBT power device to turn on and off, and the rectified DC power can be inverted into 50 / 60HZ power frequency AC power. Among them, the real-time calculation of the PWM pulse signal by the microprocessor is the key link of the inverter control technology. [0003] The existing inverter control software is mainly aimed at voltage stabilization, and also has functions such...

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Application Information

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IPC IPC(8): H02P1/42
Inventor 王榕生
Owner FUZHOU UNIV
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