3300v frequency converter adopting phase voltage frequency conversion technology

Abstract

The invention discloses a 3300v frequency converter adopting a phase voltage frequency conversion technology. The 3300v frequency converter adopts an input 3300v transformer and comprises a first input circuit, a second input circuit and a third input circuit; the first input circuit is a R-O input circuit; the second input circuit is an S-O input circuit; the third input circuit is a T-O input circuit; a first output circuit, a second output circuit and a third output circuit correspond to the first input circuit, the second input circuit and the third input circuit, respectively. As the rectification and inversion power devices of the frequency converter are arranged according to a special topology structure, the 3300v frequency converter adopting the phase voltage frequency conversion technology obtains an effect of driving a 3300v motor by using a 4500v withstand voltage level IGBT.

Description

technical field [0001] The invention belongs to a 3300V frequency converter adopting phase voltage frequency conversion technology. Background technique [0002] With the rapid development of power electronic devices, the application of power electronic devices is becoming more and more extensive. For example, high-power power electronic converters are required in large-capacity motor drive systems and AC-DC transmission systems. , high control requirements, complex system and so on. Due to the improvement of capacity and voltage level, it is difficult for traditional two-level inverters to meet the requirements of these high-voltage and large-capacity applications, mainly in the following three aspects: 1. High voltage will lead to high du / dt and wave The surge voltage causes the insulation breakdown of the rotor winding of the motor; 2. The semiconductor switching device produces a large voltage stress and a large switching loss, which reduces the efficiency; 3. The high-...

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Problems solved by technology

[0002] With the rapid development of power electronic devices, the application of power electronic devices is becoming more and more extensive. For example, high-power power electronic converters are required in large-capacity motor drive systems and AC-DC transmission systems. , high control requirements, complex system, etc.

Due to the improvement of capacity and voltage level, it is difficult for traditional two-level inverters to meet the requirements of these high-voltage and large-capacity applications, mainly in the following three aspects: 1. High voltage will lead to high du / dt and wave The surge voltage causes the insulation breakdown of the rotor winding of the motor; 2. The semiconductor switching device produces a large voltage stress and a large switching loss, which reduces the efficiency; 3. The high-frequency switch produces broadband damage to nearby communication or other electronic equipment. EMI(10kHz~30kHz), etc.

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