CN-121689859-B - Phase splitting inverter with low no-load power consumption, control method thereof and storage medium

CN121689859BCN 121689859 BCN121689859 BCN 121689859BCN-121689859-B

Abstract

The invention relates to the technical field of power electronic control, and discloses a split-phase inverter with low no-load power consumption, a control method thereof and a storage medium, wherein a group of opposite-top switching tubes are arranged on an alternating current side and a group of high-frequency switching tubes are arranged on a direct current side so as to control the opposite-top switching tubes and the high-frequency switching tubes to perform wave generation according to a first wave generation mode under the condition that the split-phase inverter is in a starting state, thereby reducing reactive circulation of the split-phase inverter and no-load power consumption of the split-phase inverter, meanwhile, under the condition that the real-time value of the output current of the split-phase inverter is larger than or equal to a first current threshold value, the group of opposite-top switching tubes and the high-frequency switching tubes are switched to wave generation in a second wave generation mode, so that the split-phase inverter is ensured to be capable of normally carrying, and compared with the related prior art, the problem of extremely large no-load power consumption can be solved, a large-current switching tube or a large radiator is not needed, the product size is smaller, the power density is high, and the cost is lower.

Inventors

HAN SHUZE
WANG SHANWEI
WANG YONGZHE
LI YALONG
WANG HAO

Assignees

西安图为电气技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (5)

1. A control method of a split-phase inverter with low no-load power consumption, characterized in that the split-phase inverter comprises: the high-frequency unit is connected with the input end of the split-phase inverter at one side, wherein the high-frequency unit comprises a first switching tube and a second switching tube which are connected, and the first switching tube and the second switching tube are used for driving the split-phase inverter to enter a half-bridge inversion load mode when the split-phase inverter is loaded; The power frequency unit is connected with the other side of the high-frequency unit, wherein the power frequency unit comprises a third switching tube and a fourth switching tube which are connected in a butt joint mode, and the third switching tube and the fourth switching tube are used for reducing reactive circulation of the split-phase inverter when the split-phase inverter is in idle load; The method comprises the following steps: Step S1, when the split phase inverter is monitored to be in a starting state, controlling the split phase inverter to emit waves in a first wave emitting mode; the first wave-generating mode comprises that the first switching tube and the second switching tube generate waves in a unipolar SPWM wave-generating mode, and the third switching tube and the fourth switching tube generate power frequency waves along positive and negative half cycles of a preset target voltage; Step S2, continuously monitoring an output current real-time value of the split-phase inverter; Step S3, when the real-time value of the output current is monitored to be larger than or equal to a preset first current threshold value, switching the first wave-generating mode into a second wave-generating mode at a zero crossing point of a next power frequency dead zone of the split-phase inverter; the second wave-transmitting mode comprises that the first switching tube and the second switching tube transmit waves in a bipolar SPWM wave-transmitting mode, and the third switching tube and the fourth switching tube do not transmit waves.
2. The control method according to claim 1, characterized by further comprising, after the step S3, the steps of: Step S4, continuously monitoring an output current real-time value of the split-phase inverter; Step S5, when the real-time value of the output current is monitored to be smaller than or equal to a preset second current threshold value, switching the second ripple mode into the first ripple mode at a zero crossing point of a next power frequency dead zone of the split-phase inverter; Wherein the second current threshold is less than the first current threshold.
3. The control method according to claim 2, characterized by further comprising, after said step S5, the steps of: Step S6, executing step S2 again.
4. An electronic device, comprising: At least one processor; at least one memory for storing at least one program; a control method of a split-phase inverter of low no-load power consumption according to any one of claims 1 to 3, when at least one of said programs is executed by at least one of said processors.
5. A computer-readable storage medium, in which a processor-executable program is stored, which when executed by a processor is adapted to implement the control method of a split-phase inverter of low no-load power consumption as claimed in any one of claims 1 to 3.

Description

Phase splitting inverter with low no-load power consumption, control method thereof and storage medium Technical Field The invention relates to the technical field of power electronic control, in particular to a split-phase inverter with low no-load power consumption, a control method thereof, electronic equipment and a computer readable storage medium. Background In recent years, in the field of small energy storage, there is an increasing demand for split phase inverters. With the continuous development of industrial application, the split-phase inverter has higher and higher requirements on no-load power consumption, while the conventional half-bridge inverter has larger no-load power consumption, which is unacceptable in small-sized energy storage application. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the invention provides a split-phase inverter with low no-load power consumption, a control method thereof and a storage medium, and the no-load power consumption of the split-phase inverter can be reduced. In a first aspect, an embodiment of the present invention provides a split-phase inverter with low no-load power consumption, including: the high-frequency unit is connected with the input end of the split-phase inverter at one side, wherein the high-frequency unit comprises a first switching tube and a second switching tube which are connected, and the first switching tube and the second switching tube are used for driving the split-phase inverter to enter a half-bridge inversion load mode when the split-phase inverter is loaded; the power frequency unit is connected with the other side of the high-frequency unit, wherein the power frequency unit comprises a third switching tube and a fourth switching tube which are connected to the top, and the third switching tube and the fourth switching tube are used for reducing reactive circulation of the split-phase inverter when the split-phase inverter is in idle load. Optionally, in one embodiment of the present invention, further includes: The filtering unit is arranged between the power frequency unit and the output end of the split phase inverter and is used for filtering the output current of the split phase inverter. Optionally, in an embodiment of the present invention, the first switching tube and the second switching tube both use IGBTs with rated currents of 50A, and the third switching tube and the fourth switching tube both use IGBTs with rated currents of 15A. In a second aspect, an embodiment of the present invention provides a control method for a split-phase inverter with low no-load power consumption according to the first aspect, including the following steps: Step S1, when the split phase inverter is monitored to be in a starting state, controlling the split phase inverter to emit waves in a first emitting mode, wherein the first emitting mode comprises that the first switching tube and the second switching tube emit waves in a unipolar SPWM emitting mode, and the third switching tube and the fourth switching tube emit power frequency emitting waves along positive and negative half cycles of a preset target voltage; Step S2, continuously monitoring an output current real-time value of the split-phase inverter; And step S3, when the real-time value of the output current is monitored to be greater than or equal to a preset first current threshold value, switching the first wave-generating mode into a second wave-generating mode at a zero crossing point of a next power frequency dead zone of the split-phase inverter, wherein the second wave-generating mode comprises that the first switching tube and the second switching tube perform wave generation in a bipolar SPWM wave-generating mode, and the third switching tube and the fourth switching tube do not generate waves. Optionally, in one embodiment of the present invention, after the step S3, the method further includes the following steps: Step S4, continuously monitoring an output current real-time value of the split-phase inverter; And S5, when the real-time value of the output current is monitored to be smaller than or equal to a preset second current threshold value, switching the second ripple mode into the first ripple mode at a zero crossing point of a next power frequency dead zone of the split-phase inverter, wherein the second current threshold value is smaller than the first current threshold value. Optionally, in one embodiment of the present invention, after the step S5, the method further includes the following steps: Step S6, executing step S2 again. In a third aspect, an embodiment of the present invention provides an electronic device, including: At least one processor; at least one memory for storing at least one program; the control method of the split-phase inverter of low no-load power consumption as described in the second aspect is realized when at least one of the progr