Abstract
The design variable speed drive induction motor is based on the power supply system of cascaded H-bridge seven level inverter. The variable speed regulation of the induction motor is performed by controlling the variable magnitude and output voltage frequency of the CHB circuit. The output voltage of the CHB circuit is generated by synthesizing the reference voltage signal derived from the field oriented control algorithm model of the induction motor. Testing and circuit operation mode using switching phase-switch technique on variable speed drive system of induction motor is done to know system performance in transient and steady-state by using computer software. The response of the simulation shows the conformity of the proposed concept. From this research is expected to improve the quality and capacity of output power in modular way so that it can be applied to the electric drive in general.
Highlights
Controlling the induction motor speed variable requires a controlled DC to AC voltage converter circuit or called the "inverter" [1] - [3]
The cascaded H-bridge (CHB) multilevel inverter circuit is formed by connecting the basic module block of the H-bridge inverter in series or multilevel to get a higher output voltage and to reduce harmonic defects
The number of voltage levels generated by the multilevel inverter CHB circuit output can be formulated as follows: With H is the number of H-bridge modules per phase, and m is the number of voltage levels generated by the multilevel inverter CHB circuit whose value is always in the form of an odd number
Summary
Controlling the induction motor speed variable requires a controlled DC to AC voltage converter circuit or called the "inverter" [1] - [3]. The form of cascaded H-bridge (CHB) multilevel inverter is a power electronics converter circuit that is very popular and suitable for applications that require high power. The advantage of using the CHB multilevel inverter circuit topology is to reduce harmonic distortion, reduce electromagnetic interference, and can be manufactured in a modular form [3] - [5]. The expected goal in this paper is to design a controlled AC voltage source that can be used to supply and control the speed of the induction motor and design an induction motor variable speed control algorithm using the field oriented control (FOC) method
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