Control method, system and storage medium for improving dead zone compensation under low profile system
A control method and dead zone compensation technology, applied in control systems, motor control, output power conversion devices, etc., can solve problems such as dead zone compensation errors, achieve the effects of overcoming errors, improving dead zone compensation, and eliminating voltage deviations
Active Publication Date: 2021-11-26
致瞻科技(上海)有限公司
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[0004] The purpose of the embodiment of the present invention is to provide a control method, system and storage medium for improving dead zone compensation under low modulation, the control method, system and storage medium can overcome the dead zone caused by the introduction of high-frequency square wave signals in the prior art Compensate for technical problems that generate errors, and dynamically adjust the compensation amount of the modulated signal, thereby improving the overall performance of the system
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[0039] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the implementation manners of the present invention, and are not intended to limit the implementation manners of the present invention.
[0040] In the embodiments of the present invention, unless stated otherwise, the used orientation words such as "up, down, top, bottom" are usually for the directions shown in the drawings or for vertical, vertical or The term used to describe the mutual positional relationship of each component in terms of the direction of gravity.
[0041] In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not b...
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Embodiments of the present invention provide a control method, system and storage medium for improving dead zone compensation under a low-modulation system, and belong to the technical field of voltage modulation. The control method includes: judging whether a square wave signal is added to the modulation signal; in the case of judging that a square wave signal is added to the modulation signal, judging whether the square wave signal is currently in a transition state; When the square wave signal is currently in a jump state, it is judged whether the jump state is a positive jump; when it is judged that the jump state is a positive jump, it is judged whether the current signal of the current phase is positive; When judging that the current signal is positive, calculate the compensation voltage of the modulation signal according to formula (1); when judging that the transition state is a negative transition, judge whether the current signal of the current phase is negative; When it is judged that the current signal is negative, the compensation voltage of the modulation signal is calculated according to the formula (1).
Description
technical field [0001] The invention relates to the technical field of voltage modulation, in particular to a control method, a system and a storage medium for improving dead zone compensation under a low modulation system. Background technique [0002] In high-power power electronic devices, high-voltage multi-level technology is usually used, typically a three-level topology. When the load motor starts or runs at low speed, the output voltage amplitude is very low, such as figure 1 As shown (the upper part is the sinusoidal modulation wave with a modulation degree of 0.05 and the high-frequency triangular carrier wave, and the lower part is the actual output three-level voltage waveform). The extremely low voltage amplitude causes the output voltage waveform to be a series of extremely narrow pulses. Due to the minimum pulse width limitation, some narrow pulses are discarded during actual output, resulting in output voltage deviation. Especially when using speed sensorle...
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IPC IPC(8): H02M1/00H02P29/00
CPCH02M1/00H02P29/00H02M1/0003H02M1/0038
Inventor 向礼朱楠
Owner 致瞻科技(上海)有限公司