A narrow pulse control method, device and system
A control method and technology of a control device, which are applied to output power conversion devices, electrical components, and AC power input to DC power output, etc., can solve the problem of reducing the utilization rate of busbar voltage and failing to fully realize the peak power output of the inverter. and other problems to achieve the effect of reducing torque ripple and improving bus voltage utilization.
Active Publication Date: 2019-05-31
SUNGROW POWER SUPPLY CO LTD
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[0004] In order to ensure the normal turn-on and turn-off of the switching tube, it is necessary to process the narrow pulse, such as suppressing the output of the narrow pulse or compensating the narrow pulse. However, this will reduce the utilization rate of the bus voltage and cannot fully realize the inverter The peak power output capability of
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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0036] In order to solve the problem in the prior art that when the inverter solves the narrow pulse, the utilization rate of the bus voltage is reduced, and the peak power output capability of the inverter cannot be fully realized, this solution provides a narrow pulse control method, device and The system compares the sum of the modulation wave comparison value and the residual comparison value with the size of the predetermined parameter, and according to th...
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The invention provides a narrow pulse control method, device and system. A sum of a modulating wave comparison value and a residual comparison value is compared with a preset parameter, and according to a comparison, an output value of a modulating wave of an inverter is set to be a PWM cycle value or zero. In addition, when the sum of the modulating wave comparison value and the residual comparison value is judged to be larger than or equal to a difference value of the PWM cycle value and a preset narrow pulse threshold value, the output value of the modulating wave of the inverter is controlled to be the PWM cycle value, the residual comparison value is controlled to be a difference value of the PWM cycle value, and the modulating wave comparison value and the residual comparison value, otherwise, the sum of the modulating wave comparison value and the residual comparison value is smaller than or equal to a narrow pulse threshold value, and finally an effective value of a PWM modulating wave output in each modulation period is unchanged, thereby improving the busbar voltage utilization rate, and reducing torque pulsation.
Description
technical field [0001] The present invention relates to the technical field of automatic control, and more specifically, relates to a narrow pulse control method, device and system. Background technique [0002] With the continuous development of new energy sources, photovoltaic power generation has developed rapidly. Usually, as the core equipment of photovoltaic power generation, there are also various inverters. For example, inverters include photovoltaic inverters, wind power converters, and new energy motor controllers. [0003] Wherein, the inverter converts the input DC power into AC power for output by controlling the on and off states of its internal switching tube (IGBT). However, the switching tube has limitations on the minimum on-time and minimum off-time, which requires that the pulse width of the PWM output of the switching tube should not be too narrow. Generally, a PWM pulse with a pulse width smaller than the minimum switching time of the switching tube is...
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IPC IPC(8): H02M7/537
CPCH02M7/537
Inventor 于安博杜恩利
Owner SUNGROW POWER SUPPLY CO LTD