초록 ▼

A control system controls a D.C. speed-change motor to change the transmission configurations on a treadmill transmission powered by an A.C. drive motor. The control system may be either microprocessor based or a system of discrete logical pieces. The control system responds to both the current spee

A control system controls a D.C. speed-change motor to change the transmission configurations on a treadmill transmission powered by an A.C. drive motor. The control system may be either microprocessor based or a system of discrete logical pieces. The control system responds to both the current speed of the treadmill belt and the electrical current drawn by the speed-change motor. The control system uses this information to modulate the duty cycle of voltage pulses sent to the D.C. speed-change motor to power the speed-change motor in response to a determination by the control system that the speed-change motor needs to rotate faster or slower to produce a constant rate of speed change for the treadmill belt. The control system also includes a rapid deceleration system. In response to the user\s direction or in response to the condition of the treadmill, the control system sends a high voltage to the D.C. speed change motor to cause it to rapidly change the configuration of the transmission to decelerate the belt.

대표청구항 ▼

A treadmill comprising: a) an A.C. drive motor having a rotating member; b) a treadmill belt; c) means for connecting said rotating member to said treadmill belt so that rotation of said rotating member causes said treadmill belt to move, said means for connecting including means for varying the spe

A treadmill comprising: a) an A.C. drive motor having a rotating member; b) a treadmill belt; c) means for connecting said rotating member to said treadmill belt so that rotation of said rotating member causes said treadmill belt to move, said means for connecting including means for varying the speed of said treadmill belt when said rotating member is rotating at a constant speed; d) a D.C. speed change motor connected to said means for varying so that said D.C. speed change motor causes said means for varying to vary the speed of said treadmill belt; and, e) means for controlling said D.C. speed change motor including means for sending a varying voltage signal to said D.C. speed change motor for varying the rate of rotation of said D.C. speed change motor so that said D.C. speed change motor operates in response to said means for sending to cause a constant rate of change of speed of said treadmill belt.