AC load matching method and device
A technology of AC load and matching method, which is applied in the direction of circuit devices, AC network circuits, instruments, etc., and can solve problems such as the inability to use resistive load devices, equipment failure, and low nominal load power
Active Publication Date: 2022-08-05
东莞市广数电气技术有限公司
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Problems solved by technology
[0002] In some household or industrial applications, equipment with AC discharge functions such as UPS and energy storage inverters are often used to supply power and heat to load devices such as kettles, hair dryers, electric heating wires, and induction cookers. Sometimes UPS or energy storage The rated output power of the inverter is smaller than the nominal power of the heating load and these resistive load devices cannot be used
[0003] When encountering the above situation, there are two solutions in the prior art. One solution is that when the load connected to the AC output of the device exceeds the load of its rated output power specification, the device will be triggered due to overcurrent protection or overheating protection. The load cannot work normally; another solution is that when the load connected to the power supply equipment exceeds the load specified by its rated output power, the power supply equipment first works with the excess power, and then reduces to the rated power; in this way, the power supply equipment is output When the voltage is higher than the matching point of the load consumption power and the rated full-load output power of the power supply equipment, it will work in an overload state during the period, which will easily cause damage to some devices and cause equipment failure, or leave a large margin in the design plan and increase product costs.
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[0031] In order to express the present invention more clearly, the present invention will be further described below with reference to the accompanying drawings.
[0032] As described in the background art, when the output power of the power supply equipment is lower than the working power of the electrical equipment, there are two processing methods in the prior art. The first is to directly cut off the direct connection between the power supply equipment and the load, and the power supply equipment is no longer Load power supply; but in most cases, the load can work at low power; therefore, it is not the best solution to directly stop supplying power to the load; another solution is to overload the power supply equipment first, and then gradually reduce the output power of the power supply equipment. Although the load can be made to work at low power, the overload operation is easy to cause damage to some components of the power supply equipment; based on this, the present in...
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The invention discloses an AC load matching method and device, belonging to the technical field of power supply. Compared with the prior art, the solution of the invention can still drive the load when the rated output power of the power supply equipment is lower than the rated power of the load power. Work at the actual power lower than the rated power of the load; and the power supply equipment will not be overloaded at any stage during the whole process; at the same time, the power supply equipment can quickly adjust the output voltage to a value matching the load, and the load will operate at an appropriate low power Work.
Description
technical field [0001] The invention relates to the technical field of power supply, in particular to an AC load matching method and device. Background technique [0002] In some household or industrial applications, equipment with AC discharge functions such as UPS and energy storage inverters are often used to power and heat load devices such as kettles, hair dryers, heating wires, and induction cookers. Sometimes UPS or energy storage devices are encountered. The inverter rated output power specification is less than the nominal power of the heating load and these resistive load devices cannot be used. [0003] When the above situation is encountered, there are two solutions in the prior art. One solution is that when the load connected to the AC output of the device exceeds its rated output power specification, the device will trigger overcurrent protection or overheating protection. The load cannot be allowed to work normally; another solution is that when the load con...
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IPC IPC(8): H02J3/00G05F1/66
CPCH02J3/00G05F1/66
Inventor 柳介江翠平熊冬梅黄亭
Owner 东莞市广数电气技术有限公司