Inverter circuit

A technology of inverter circuit and input circuit, which is applied in the circuit field, can solve the problems of high cost, difficult maintenance, and large volume, and achieve the effect of low circuit cost, strong stability, and increased pole logarithm

CN108111092APending Publication Date: 2018-06-01深圳市三行技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-06-01

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Abstract

The invention relates to the technical field of circuits and discloses an inverter circuit. The inverter circuit comprises an input circuit and a series circuit, wherein the input circuit receives anexternal AC power supply, carries out half-bridge rectification on the AC power supply and outputs a DC power supply; the series circuit receives the DC power supply, inverts the DC power supply intotwo paths of AC three-level and controls a motor through the two paths of AC three-level; and the function of inverting the two paths of three-level is achieved through multiple IGBTs. The inverter circuit is relatively low in cost and high in stability, the number of pole pairs of the motor is improved and torque output of the motor is improved.
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Description

technical field

[0001] The invention relates to the technical field of circuits, in particular to an inverter circuit. Background technique

[0002] The frequency converter is a power control device that uses the on-off function of power semiconductor devices to convert the power frequency power supply to another frequency. With the rapid development of modern power electronics technology and microelectronics technology, high-voltage and high-power frequency conversion speed control devices continue to mature. At present, most high-voltage frequency converters use phase-shifting transformers, and the modules are connected in series for phase-shifting output, resulting in large equipment size, high cost, and difficult maintenance. Contents of the invention

[0003] The main purpose of the present invention is to propose an inverter circuit, which realizes the two-way three-level inverter function through several IGBTs, the circuit cost is low, the stability is strong, and ...

Examples

Embodiment Construction

[0012] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0013] Such as figure 1 As shown, in this embodiment, an inverter circuit includes: an input circuit and a series circuit, the input circuit receives an external AC power supply, performs half-bridge rectification on the AC power supply, and outputs a DC power supply, and the The series circuit receives the DC power supply, and inverts the DC power supply into two AC three-level circuits, and controls the motor through the two AC three-level circuits.

[0014] In this embodiment, a number of IGBTs (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) are used to realize the two-way three-level inverter function, the circuit cost is low, the stability is strong, and the number of pole pairs of the motor is increased. Increased motor torque output.

[0015] Such as figure 2 As shown, in this embodim...