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.
Description. Refrigerators often use a damper to control airflow and a fan to provide circulation. While discrete solutions have been used for years, this TI Design uses integrated motor drivers that provide easy control, high performance, and full protection. The DRV8848 drives the stepper motor damper, and the DRV10983 drives the BLDC fan with quiet 180Â° commutation. The BLDC even has closed-loop speed control, using an MSP430G2553 and the DRV8812 for a PWM-based power supply. The whole solution uses a single-layer PCB.