Frequency converter main loop circuit with efficient filter capacity
A filter capability and filter circuit technology, which is applied in the field of the main circuit circuit of the frequency converter, can solve the problems of impact damage, no installation space, and no instrument protection circuit, etc., to reduce the working voltage, protect the rear components, and increase the protection range. Effect
Inactive Publication Date: 2014-07-23
TAIZHOU HENGZHI ELEVATORING SCI & TECH
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Problems solved by technology
Ordinary overcurrent protection devices are not only not precise enough, they may not respond to sudden instantaneous signals in a timely manner, but also have no protection circuit for their own instruments, and are easily damaged by impact
If an additional protection circuit is added, the cost will be increased and there may be no installation space
Method used
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[0009] 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.
[0010] see figure 1 , in an embodiment of the present invention, a frequency converter main circuit circuit with high-efficiency filtering capability includes a rectifier circuit 1, a filter circuit 2, a brake circuit 3 and an inverter circuit 4, the rectifier circuit 1, filter circuit 2, brake circuit 3 and the inverter circuit 4 are sequentially connected in parallel to form a complete inverter main circuit circuit;
[0011] The rectifier circuit 1 includes...
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The invention discloses a frequency converter main loop circuit with efficient filter capacity. The frequency converter main loop circuit comprises a rectification circuit, a filter circuit, a brake circuit and an inverter circuit which are sequentially and parallelly connected. The protective range of the circuit is widened by the aid of a high-resistance capacitor C1 and a low-resistance capacitor C2 in the filter circuit, noise waves are filtered according to combination of low-frequency filter signals of the high-resistance capacitor C1 and high-frequency filter signals of the low-resistance capacitor C2, alternating current is further filtered according to the characteristic that the alternating current passes the capacitors, internal voltage of the circuit is divided by serially connecting resistors R3, so that subsequent working voltage is reduced, the resistors can effectively function in isolating the alternating current and direct current, and rear components are protected.
Description
technical field [0001] The invention relates to a frequency converter main circuit circuit, in particular to a frequency converter main circuit circuit with high-efficiency filtering capability. Background technique [0002] With the advancement of science and technology and the improvement of industrialization, the power grid is full of signals of various complex frequencies. Power grids in factories or homes may be accompanied by varying degrees of interference and pulse shocks. Various protection devices for electricity consumption have been born. Ordinary overcurrent protection devices are not only not precise enough, and may not respond in time to sudden instantaneous signals, but also have no protection circuit for their own instruments, and are easily damaged by impact. If an additional protection circuit is added, the cost will be increased and there may be no installation space. Contents of the invention [0003] The object of the present invention is to provid...
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Inventor 董直姜
Owner TAIZHOU HENGZHI ELEVATORING SCI & TECH