Dr P Rama Mohan

• Ph.D.
• Professor (Associate) at Rajeev Gandhi Memorial College of Engineering and Technology

In this paper, a simple Generalized Pulse Width Modulation) method is developed for the Vector Control based Voltage Source Inverter fed induction motor drives. This algorithm is applied for generation of Space Vector Pulse Width Modulation along with different Discontinuous Pulse Width Modulation algorithms. In Generalized Pulse Width Modulation a...

This paper presents a high performance pulse width modulation (HPPWM) algorithm for vector controlled induction motor drive. Due to the requirement of angle and sector information, the complexity involved in classical space vector approach is more. In this paper, a simple generalized PWM (GPWM) algorithm has developed by using the imaginary switchi...

This paper presents a simple Generalized Pulse Width Modulation (GPWM) algorithm for Three Phase Voltage Source Inverter fed AC Drives. The conventional space vector approach requires angle and sector estimation for the calculation of gating times of the inverter and hence increases the complexity of the PWM algorithm. However, the proposed algorit...

This paper presents a novel generalized scalar Pulse Width Modulation(PWM) technique based on universal offset time expression for Multilevel Voltage Source Inverter (VSI) fed Vector Controlled Drives In this technique, by varying a constant between 0 and 1, various PWM techniques have been derived. These PWM techniques don’t require information of...

This paper presents novel and simple scalar Pulse Width Modulation (PWM) techniques for vector control based Induction Motor (IM) drives to reduce the common mode voltage (CMV). These PWM techniques don’t require information of angle and sector. So, there is less complexity. In the proposed approach, a generalized offset time expression is derived....

In this paper, the Enhanced Z-Source Switched Capacitor Multi-Level Inverter (EZSC-MLI) is presented, which can generate a greater number of levels and magnitude in output. The proposed MLI has greater recognition due to its low harmonic profile, fewer switching components, compact size, low switch stress, isolated DC supply, high efficiency, and l...

This paper presents a solar power based liquid sprayer for agricultural applications, environmental applications and health care applications. The proposed liquid sprayer can be used for spraying pesticides in agricultural applications. It can be used for spraying the hypo liquid in environmental applications like killing the bacteria and insects i...

This paper presents a novel system to protect the industrial and domestic loads from over voltage and under voltage in AC mains supply. The proposed system monitors the voltage and provides a breakpoint based over voltage and under voltage tripping mechanism and protects the load. The proposed system consists of a tripping mechanism that monitors t...

In the multilevel inverters, the complexity of the system will depend on number of switches and control schemes involved during the power conversion process. This article recommends a new three phase multi-level inverter topology with a minimum number of switches for PV system applications. This topology includes three level generating blocks and t...

This paper presents a multi carrier based generalized PWM algorithm for the reduction of common mode voltage in voltage source inverter fed induction motor drives. The generalized PWM algorithm is developed based on the concept of offset time. By using the magnitude test, the maximum and minimum time values are calculated at each sampling period fr...

This paper presents simple generalized scalar PWM algorithms for three and five-level inverter fed vector controlled drive. The proposed PWM technique uses the notion of imaginary switching times and hence does not require sector and reference voltage vector calculations. Based on the magnitude tests, the minimum and maximum times will be calculate...

This paper presents a simple generalized pulse width modulation algorithm for induction motor drives. The conventional space vector approach requires the angle and sector information to calculate the actual gating times of the inverter, which increases the complexity of the pulsewidth modulation algorithm. Hence to reduce the complexity, the propos...

A novel zero voltage transition (ZVT) technique based closed loop control of boost power factor correction (PFC) converter with electro magnetic interference (EMI) filter is presented in this paper. It operates at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn-off of the boost diode. This is accompli...

This paper deals with the simulation of a Boost Power Factor Correction (PFC) Converter with Electro Magnetic Interference (EMI) Filter. The diode rectifier with output capacitor gives poor power factor. The Boost Converter of PFC Circuit is analyzed and then simulated with diode rectifier. The Boost PFC Converter with EMI Filter is simulated for r...

This paper deals with the closed loop control of a Boost Power Factor Correction (PFC) Converter with Electro Magnetic Interference (EMI) Filter to regulate the output voltage for the source side and load side disturbances. Circuit model for closed loop controlled boost power factor correction converter is developed. A controller is used to regulat...

A Boost Power Factor Correction (PFC) Converter employing Zero Voltage Switching (ZVS) based Compound Active Clamping (CAC) technique is presented in this paper. An Electro Magnetic Interference (EMI) Filer is connected at the line side of the proposed converter to suppress Electro Magnetic Interference. The proposed converter can effectively reduc...

A novel Zero Voltage Transition (ZVT) technique based closed loop control of Boost Power Factor Correction (PFC) converter with Electro Magnetic Interference (EMI) Filter is presented in this paper. It operates at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn- off of the boost diode. This is accompl...

This paper deals with Electro Magnetic Interference in switching power supplies. The EMI consists of mainly common mode and differential mode noises. Due to interference, the efficiency of the equipment reduces and some times the equipment may be damaged. A procedure to design a novel topology of EMI Filter to suppress these two noises is presented...

A novel Zero Voltage Transition (ZVT) technique based closed loop control of Boost Power Factor Correction (PFC) converter with Electro Magnetic Interference (EMI) Filter is presented in this paper. It operates at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn-off of the boost diode. This is accompli...

This paper deals with theory and analysis of Electro Magnetic Inteference (EMI). The EMI consists of mainly common mode and differential ode noises. Due to interference, the efficiency of the equipment reduces and some limes the equipment may be damaged A novel topology of EMI Filter and its design to suppress these two noises in a Zero Voltage Tra...

This paper deals with Electro Magnetic Interference (EMI) in switching power supplies. The EMI consists of mainly common mode and differential mode noises. Due to interference, the efficiency of the equipment reduces and some times the equipment may be damaged. A procedure to design a novel topology of EMI filter to suppress these two noises is pre...

This study deals with the simulation and implementation of Power Factor Correction (PFC) Boost Converter along with Electro Magnetic Interference (EMI) Filter. The Boost Converter of PFC Circuit is analyzed, designed and then simulated for resistive load. Near unity power factor is obtained by using PFC Boost Converter with EMI Filter. The laborato...

A novel Zero Voltage Transition (ZVT) technique based closed loop control of Boost Power Factor Correction (PFC) converter with Electro Magnetic Interference (EMI) Filter is presented in this paper. It operates at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn-off of the boost diode. This is accompli...

In this paper, the issues of Electro Magnetic Interference (EMI) and its suppression in a Power Electronic System is presented. Different noises especially common mode noise and differential mode noise are analysed. A Boost PFC circuit employing ZVT technique is analysed and then an EMI filter is designed in the input side of PFC converter to prote...

These A novel power factor correction (PFC) Converter employing zero voltage transition (ZVT) technique based boost topology is proposed in this paper. It operates at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn-off of the boost diode. This is accomplished by employing resonant operation only durin...