Abstract: The preferred embodiment the invention proposes pertains to a three-phase induction motor, and operates on the premises of having the extension cords on two ends of the motor embedded with several balancing eccentric washers and a balancing eccentric block added, of which the eccentric block contains a sleeve bearing, and one end of the eccentric block is fitted with a bolt, with the bolt head covered with rubber; o-ring is fitted between the balancing eccentric washer and balancing eccentric block, whereby using the invention's frequency changer for controlling an AC 3-phase induction motor serves to generate multiple frequencies for generating different amplitudes, which can be use to control the speed and load emitted between the eccentric block and balancing eccentric washer.

Abstract: An exercise cycle is disclosed as having a base member that anchors and supports a vertical frame, a transmission mechanism, a cam mechanism, a seat and seat support, and pedals. The vertical frame includes a vertical supporting member mounted to the base member, and a vertical support extending upwardly from the vertical supporting member. The cam mechanism has two sides and one pedal is connected to each side. When a user pushes on the pedals, the cam mechanism rotates. The cam rotation surface conveys the motion to a standing support pulley and yoke pulley causing it to rotate. The yoke in turn conveys the motion to the seat support causing the seat to move up and down. The cam mechanism serves to provide an overall coordination and balance of the exercise cycle.

Abstract: The preferred embodiment the invention proposes pertains to a three-phase induction motor, and operates on the premises of having the extension cords on two ends of the motor embedded with several balancing eccentric washers and a balancing eccentric block added, of which the eccentric block contains a sleeve bearing, and one end of the eccentric block is fitted with a bolt, with the bolt head covered with rubber; o-ring is fitted between the balancing eccentric washer and balancing eccentric block, whereby using the invention's frequency changer for controlling an AC 3-phase induction motor serves to generate multiple frequencies for generating different amplitudes, which can be use to control the speed and load emitted between the eccentric block and balancing eccentric washer.