Patent ID: 6531998
Filing Date: 2003-03-11
Classification: G05G,G06F,H02M

Abstract:
A haptic gaming device comprising:(a) a housing in which a prime mover used to produce a force feedback is disposed; (b) a control for the prime mover that is disposed within the housing; and (c) an integral power supply for the prime mover that is disposed within the housing and is adapted to couple to an alternating current (AC) line power source, said integral power supply providing power to the prime mover to energize it, and said power supply comprising: (i) a rectifier that converts AC line power to a direct current (DC) voltage; (ii) a transformer coupled to the rectifier to receive the DC voltage, wherein the transformer includes two primary windings and a secondary winding, one of the primary windings providing a feedback signal; and (iii) an electronic switching circuit that responds to the feedback signal produced by the transformer and periodically connects the rectifier to the transformer so that the transformer is energized with a pulsed DC voltage, said electronic switching circuit including a pulse width modulator (PWM) switching control that periodically interrupts the DC voltage applied from the rectifier to the transformer at a predetermined frequency and varies a duty cycle of the pulsed DC voltage to maintain an output voltage from the transformer that is coupled to the prime mover within a predetermined range for an input AC line voltage that can vary by more than 100 volts.