Variable frequency controller

A frequency conversion controller and circuit technology, which is applied to printed circuits and printed circuit components that contain printed electrical components and non-printed electrical components, and can solve problems such as unreasonable wiring of EMI capacitors and affecting work reliability.

Pending Publication Date: 2021-09-28
GUANGDONG HIIC SEMICON LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to solve the problem of affecting the reliability of the work due to unreasonable wiring of EMI capacitors in the existing controllers provided with two or more semiconductor circuits

Method used

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Embodiment Construction

[0022] It should be noted that, under the condition that there is no conflict in structure or function, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below based on examples.

[0023] The semiconductor circuit mentioned in the present invention is a circuit module that integrates power switching devices and high-voltage drive circuits, and is sealed and packaged on the outside. It is widely used in the field of power electronics, such as frequency converters for driving motors, Various inverter voltage, frequency conversion speed regulation, metallurgical machinery, electric traction, frequency conversion home appliances and other fields. The semiconductor circuit includes an inverter circuit composed of at least six switch tubes of the upper and lower bridge arms, and a drive circuit for driving the inverter circuit, so as to realize the load operation such as dri...

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Abstract

The invention relates to a variable frequency controller, which comprises a PCB, wherein the PCB comprises a first side edge and a second side edge which are opposite to each other, a first semiconductor circuit, a second semiconductor circuit and a bridge rectifier are sequentially arranged on the PCB close to the first side edge, the first semiconductor circuit is arranged close to a first connecting edge connecting the first side edge and the second side edge, an EMI circuit is further arranged on the PCB, the input end of the EMI circuit is connected with the input end of an alternating current power supply, the output end of the EMI circuit is connected with the input end of the bridge rectifier, and the EMI circuit is arranged close to a second connecting edge opposite to the first connecting edge. By arranging one side of the bridge rectifier close to the second connecting edge, the length of the alternating current input side routing can be effectively reduced, so that the loop area of the alternating current input side routing is reduced, the interference of the loop area on peripheral circuits, especially low-voltage circuits such as an MCU control circuit is reduced, the PCB area occupied by the alternating current routing is also reduced, and then the cost is reduced while the working reliability is enhanced.

Description

technical field [0001] The invention relates to a frequency conversion controller, belonging to the technical field of frequency conversion controller applications. Background technique [0002] A semiconductor circuit is a power drive product that combines power electronics and integrated circuit technology. At present, in the frequency conversion controllers of some home appliances or industrial control equipment, two or more semiconductor circuits are used to drive two or more loads, such as driving a compressor and a motor at the same time. An EMI (Electromagnetic Interference, Electromagnetic Interference) circuit is generally installed at the AC input end of the variable frequency controller to reduce the external interference generated by the variable frequency controller itself and reduce the interference signal transmitted from peripheral devices. Because the EMI circuit is designed with large components, it occupies a large PCB area, and its overcurrent is large, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/16H05K1/18H05K1/02
CPCH05K1/16H05K1/181H05K1/0201
Inventor 谢荣才潘志坚王敏左安超
Owner GUANGDONG HIIC SEMICON LTD
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