In secondary hypogonadism, testosterone levels are low and levels of FSH and LH are low or inappropriately normal. Any acute systemic illness can cause temporary secondary hypogonadism. Some syndromes of hypogonadism have both primary and secondary causes (mixed hypogonadism).
Function of damper winding in synchronous machine: 1.Self starting of synchronous machine: The core concept is that damper winding being short circuited carry high current, creates magnetic flux like as induction machine.Thus there is pulling in or better torque in starting.he rotor of induction machine is mostly of squirrel cage type which is short circuited thus provides high current in start up. Damper winding in synchronous machine is placed in the coil slots and short circuited.
Dampers & Louvers: Dampers are available in motorized and gravity operated versions. Motorized (motor driven) dampers are typically used in applications where a very tight seal is required or when the damper has to operate against air pressure such as closing off a zone.Gravity dampers are typically installed in the horizontal fan exhust applications.ravity dampers do not have motors and require air pressure/air flow to open. Louvers are used on air intake or exhaust where protection from water infiltration is required.