IJSER © 2018 http://www.ijser.org DsPic33f Series Microprocessor Based Single- Phase Inverter Design and Implementation Muhammed Mustafa Kelek, Tolga Özer, Yüksel Oğuz, Mustafa Şahin Abstract— The majority of the technological devices used with the development of the technology use the network voltage (220V-50Hz). Conversion must be done to obtain the mains voltage from the DC storage voltage sources. This conversion can be done by inverter. In this study, microprocessor-based inverter design is considered to transform the voltage from DC 12V battery to 50 Hz, 220V AC. The inverter circuit is designed as two different cards in the form of power and control circuits. Thanks to the filtering circuit connected to the output of the transformer on the power card, a smooth signal with a frequency of 50 Hz is obtained. The PWM signals used for sinusoidal generation of the signal are obtained by software based on the values in the previously created sinusoidal values table. Two separate alternating PWM signals were taken with increasing and decreasing order of table. As a result of applying these signals to MOSFET switching elements, sine wave signal is generated. The voltage value of the obtained sinus signal is amplified using the transformer. Filtering was performed to remove the noise generated in the raised sinusoidal signal and 200-220V pure sine signal was obtained. Index Terms—, Single Phase Inverter, Microprocessor Control, DsPic, H-Bridge, . ——————————  —————————— 1 INTRODUCTION Inverters are used in many industrial applications nowa- days and become an indispensable element of industrial and energy based systems. The inverters are used to convert the DC voltage that they receive from sources such as battery, so- lar panel, used as DC source to AC source. Inverters are used in many areas such as motor control, uninterruptible power supplies, AC voltage sources, switched power supplies, induc- tion heating [1]. Due to this reason, studies about inverters are increasing day by day and inverter technology is constantly evolving. Cost-reduced, locally designed and manufactured inverters are the preferred and accepted work for various AC power supply applications [2]. The inverters are designed and operated by using the DC input voltage so as to obtain the sinus signal in the first half period in the positive direction and in the second half period in the negative direction. The working period of the circuit is determined by positive and negative half-periods. Semicon- ductor elements such as BJT, MOSFET, and IGBT are used as switching elements in the inverters. These elements can be controlled by triggering with different switching techniques. İ PWM control technique is generally applied in inverters and most of today's inverters are PWM inverters [3-4]. The PWM control method is obtained by comparing the square wave or sine wave at a desired frequency and phase number with an alternative carrier voltage and this control method is called Pulse Width Modulation (PWM) [5]. There are three types of voltage-source PWM inverter main circuit: single-phase half-bridge voltage-source PWM inverter, single- phase full bridge voltage source PWM inverter and three- phase bridge voltage source PWM inverter [6-7]. By using a transformer in the inverter system, both electrical isolation of the voltage is ensured and the output voltage is brought to the desired level. There are two types of transformers: Transfor- mers producing output at mains frequency are heavy and large, High frequency transformers are small and light [8-9]. In the study, application of inverter circuit with single- phase voltage supply with transformer was carried out for network independent DC / AC power supply applications. The system is basically composed of control and power. Con- trol and power card are designed. The dspic33fj32mc204 mi- croprocessor was used for the control. PWM signals are gener- ated from this control card and applied to the H-Bridge MOS- FET switching elements in the power card. IR2112 type MOS- FET driver integrations are used to enhance the signals re- quired to drive the H bridge. The sine signal obtained from the H bridge is applied to the input part of the transformer and a system design is realized in which 200-220V voltage can be obtained from the output. 2 METARIAL AND METHODS 2.1 Inverter and Types of Inverter Many different devices are used to save energy. All devic- es that convert alternating current to direct current or direct current to alternating current, and that adjust the voltages and frequencies properly are called inverters. The inverters do not generate electricity and pull all the energy they use from the battery. Figure 1 shows the flow diagram describing the oper- ating principle of the inverter. International Journal of Scientific & Engineering Research Volume 9, Issue 8, Augsut-2018 ISSN 2229-5518 77 IJSER