Control method and system for improving dead zone compensation under low modulation degree and storage medium
A control method and dead zone compensation technology, applied in the direction of control system, motor control, output power conversion device, etc., can solve problems such as dead zone compensation errors, achieve the effects of overcoming errors, improving dead zone compensation, and improving work efficiency
Active Publication Date: 2020-06-23
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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The embodiment of the invention provides a control method and system for improving dead zone compensation under a low modulation degree and a storage medium, and belongs to the technical field of voltage modulation. The control method comprises: judging whether a square wave signal is added into a modulation signal or not; under the condition of judging that a square wave signal is added into themodulation signal, judging whether the square wave signal is in a hopping state at present or not; judging whether the hopping state is positive hopping or not under the condition that the square wavesignal is judged to be in the hopping state at present; judging whether the current signal of the current phase is positive or not under the condition of judging that the hopping state is positive hopping; under the condition that the current signal is judged to be positive, calculating compensation voltage of the modulation signal according to a formula (1); judging whether the current signal ofthe current phase is negative or not under the condition that the hopping state is judged to be negative hopping; and calculating the compensation voltage of the modulation signal according to the formula (1) under the condition that the current signal is judged to be negative.
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