In this paper, a wind energy conversion system (WECS) is presented for the electrification of rural areas with availability. A three-phase AC-DC converter based on bridgeless Cuk used power extraction from permanent magnet synchronous generator (PMSG). The topology enables elimination front-end diode bridge rectifier (DBR). Moreover, has fewer components, simple control, and high efficiency, ma...

The efficiency of a short-term treatment with an intravaginal device containing progesterone (CIDR) combined with pregnant mares’ serum gonadotrophin (PMSG) and prostaglandin analogue (PGF2α) was evaluated for the induction of estrus, initiation of cyclic activity, and fertility in postpartum suckled yak cows. Seventy-five postpartum suckled yak cows were assigned to three treatments: (1) inser...

Superovulation in donors is an important factor influencing ovulation rate and embryo recovery. Crossbreed pubertal gilts (n=376) treated from year 2005 to 2009 were used as embryo donors. Experiment was evaluated in two parts: In the first part (I) gilts were divided into two groups with different synchronization schedules. In the first group (R+) 265 gilts were treated with Regumate Porcine (...

BACKGROUND Follicle stimulating hormone (FSH) exerts action on both germline and somatic compartment in both ovary and testis although FSH receptors (FSHR) are localized only on the somatic cells namely granulosa cells of growing follicles and Sertoli cells in the seminiferous tubules. High levels of FSH in females are associated with poor ovarian reserve, ovarian hyper stimulation syndrome etc...

This paper focuses on the indirect adaptive tracking control of renewable energy sources in a grid-connected hybrid power system. The renewable energy systems have low efficiency and intermittent nature due to unpredictable meteorological conditions. The domestic load and the conventional charging stations behave in an uncertain manner. To operate the renewable energy sources efficiently for ha...

BACKGROUND Protocols for the hormonal induction of ovulation and oviposition are essential tools for managing threatened amphibians with assisted reproduction, but responses vary greatly between species and even broad taxon groups. Consequently, it is necessary to assess effectiveness of such protocols in representative species when new taxa become targets for induction. The threatened genus Mi...

In this paper, based on the similarity, in structure and principle, between a grid-connected converter for a direct-driven permanent magnet synchronous generator (D-PMSG) and an active power filter (APF), a new D-PMSG-based wind turbine (WT) system configuration that includes not only an auxiliary converter in parallel with the grid-side converter, but also a coordinated control strategy, is pr...

To investigate the role of ovarian status and to find out a suitable hormonal dose for induction of superovulation and its effect on biochemical status of the ovaries, the mice were injected with PMSG in doses of 5, 7.5, and 10 IU on different days of the estrous cycle i.e. proestrus, estrus, metestrus and diestrus followed by hCG injection 48 hr later. All these treatments increased the mean o...

The control strategy and design of an AC/DC/AC IGBT-PMW power converter for PMSG-based variable-speed wind energy conversion systems (VSWECS) operation in grid/load-connected mode are presented. VSWECS consists of a PMSG connected to a AC-DC IGBT-based PWM rectifier and a DC/AC IGBT-based PWM inverter with LCL filter. In VSWECS, AC/DC/AC power converter is employed to convert the variable frequ...

This paper proposes a simple sensorless maximum power extraction control strategy for a variable speed wind energy conversion system (VSWECS) based on permanent magnet synchronous generator (PMSG). The PMSG is connected to the grid through a switch mode rectifier and a three phase voltage source inverter (VSI). Control of the generator side converter is used to achieve maximum power from the av...