In Freudian thought, psychodynamics is the study of transformations and exchanges of “psychic energy” in the personality; the psychodynamic model explains behaviors through the interactions of Freud’s innate emotional forces, the id, ego, and super-ego.
Some of the main ideas behind the psychodynamic model include parent/child relationships and their effect on our feelings and behavoir and the idea that meaningful events can affect our unconscious mind. This theory is deeply rooted in the idea of Freud’s psychoanalytic theory.
You can read more about the psychoanalytic theory and the stages of childhood here: http://homepage.newschool.edu/~quigleyt/vcs/psychoanalysis-intro.pdf
Fournier, G. (2010). Psychodynamic Model. Psych Central. Retrieved on October 10, 2015, from http://psychcentral.com/encyclopedia/2009/psychodynamic-model/