Series (parallel) resonance ring energy transient valve direct control method
A control method and instantaneous value technology, applied in the direction of control/regulation system, regulation of electric variables, conversion of DC power input to DC power output, etc., can solve the problems that cannot meet the requirements of direct control, phase shift control and power density control Difficulties, impossibility, etc.
Inactive Publication Date: 2009-01-21
YANSHAN UNIV
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Problems solved by technology
The above three control methods are essentially adjusting the equivalent average voltage added to the series or parallel resonant ring according to the output power, so as to realize the adjustment of the resonant inductor current or the resonant capacitor voltage. In terms of control strategy, none of them can meet the requirements of series Or the requirement of direct control of the instantaneous energy value of the parallel resonant ring; and when the output power needs to be adjusted in a wide range even when there is a power zero point and reverse power flow (such as a sine wave inverter power supply under inductive load and regenerative load conditions), voltage regulation Control, phase-shift control and power density control all have control difficulties and even cannot be realized; when it is necessary to achieve the control requirements of output voltage following through adjustment (such as sine wave inverter circuit), if there is a short circuit state, and the system has no additional protection circuit, will cause destructive hazards to the entire circuit system
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[0012] figure 1 The block diagram of the control principle shown is an embodiment of direct control of the instantaneous energy value of the series or parallel resonant ring, and the switching frequency of the power tube is the natural resonant frequency f r . Using a frequency of f r The equal-amplitude sine wave 1 is used as the carrier, and the output 2 of the outer loop regulator is used as the modulation wave (taking the sine wave inverter power supply as an example, the output voltage instantaneous value closed-loop regulator output is used as the modulation wave), and the multiplier is used to realize the carrier and modulation The linear multiplication of waves, the output of the multiplier takes the absolute value as the given 3 of the instantaneous value of the resonant inductor current or the resonant capacitor voltage. The given signal 3 of the instantaneous value of the resonant inductor current or the resonant capacitor voltage and the absolute value feedback 4...
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This invention relates to series (parallet) resonant ring energy instantaneous value direct control method. Constant amplitude sinusoid with frequency of fr is used as carrier wave; the output of output ring regulator is used as modulation wave. The carrier wave and modulation wave proceed linear multiplying by using high frequency multipier. The output absolute value is used as instantaneous value given of high frequency resonant signal, with corresponding feed-back signal absolute-value difference proportional-pulse-integral control output to proceed comparison of positive-negative amplitude-limiting to obtain power tube control equirement, together with synchro-regulation of frequency doublnig square-wave of fr, and regulation of pulsewidth of square-wave with frequency fr and duty-ratio 50%, to obtain corresponding power tube driving signal. It has protection function when there is over-load or short-circuit condition.
Description
technical field [0001] The invention relates to an energy control technology of series or parallel resonant rings. The control technology can realize the direct control of the instantaneous value of the resonant ring energy through the direct control of the instantaneous value of the resonant inductor current or the resonant capacitor voltage, and can realize the direct control of the instantaneous value of the resonant ring energy through the direct control of the resonant ring The control realizes forward, zero power and reverse transfer of power. Background technique [0002] At present, in power electronics technology, series or parallel resonant rings are often used as the intermediary of energy transfer, and the current and voltage waveform conversion functions of the series or parallel resonant rings are used to provide zero current and zero voltage switching moments for the main power transistor. The known series or parallel resonant rings are mainly used in the main...
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IPC IPC(8): H02M3/00
Inventor 邬伟扬金晓毅孙孝锋
Owner YANSHAN UNIV