Method of controlling motor for driving treadmill belt

Abstract

A method of controlling a motor for driving a treadmill belt includes the steps of a) providing a micro controller unit having a proportional integral derivative controller and a load predictor; b) providing a driver controllable by the micro controller unit to drive the motor used for driving the treadmill belt; c) detecting a load and a speed of the motor and sending a load feedback signal and a speed feedback signal corresponding to the detections to the micro controller unit by a load meter and a speed meter respectively; d) running a procedure and outputting a control signal to the driver by means of computation of the proportional integral derivative controller and the load predictor; e) regulating the output status of the motor by the driver subject to the control signal received; and f) repeating step c) to step e) till end of the procedure.

1 . A method of controlling a motor used for driving a treadmill belt, the method comprising the steps of:
 a) providing a micro controller unit having a proportional integral derivative controller and a load predictor;   b) providing a driver controllable by the micro controller unit to drive the motor used for driving the treadmill belt;   c) detecting a load and a speed of the motor and sending a load feedback signal and a speed feedback signal corresponding to the detections to the micro controller unit by a load meter and a speed meter respectively;   d) running a procedure by the micro controller unit and outputting a control signal to the driver by means of computation of the proportional integral derivative controller and the load predictor;   e) regulating the output status of the motor by the driver subject to the control signal received; and   f) repeating step c) to step e) by the micro controller unit and the driver till end of the procedure.   
   
   
       2 . The method as claimed in  claim 1 , wherein the micro controller unit provided in step a) comprises a controller unit, which enables the micro controller unit to run control functions. 
   
   
       3 . The method as claimed in  claim 1 , wherein the micro controller unit provided in step a) comprises an arithmetic logic unit, which enables the micro controller unit to run a logic algorithm function and an arithmetic algorithm function. 
   
   
       4 . The method as claimed in  claim 1 , wherein the micro controller unit provided in step a) comprises a timer, which enables the micro controller unit to run a time sequence control function. 
   
   
       5 . The method as claimed in  claim 1 , wherein the micro controller unit provided in step a) comprises an input/output port, which allows connection of the driver. 
   
   
       6 . The method as claimed in  claim 1 , wherein the micro controller unit provided in step a) comprises an input/output port, which allows connection of the load meter. 
   
   
       7 . The method as claimed in  claim 1 , wherein the micro controller unit provided in step a) comprises an input/output port, which allows connection of the speed meter. 
   
   
       8 . The method as claimed in  claim 1 , wherein the motor is selected from one of a DC motor and a brushless motor. 
   
   
       9 . The method as claimed in  claim 1 , wherein the load feedback signal in step c) indicates the load status by a current value. 
   
   
       10 . The method as claimed in  claim 1 , wherein the procedure in step d) includes the steps of:
 d1) recording the load feedback signal and the speed feedback signal to obtain the operation status of the motor by the micro controller unit;   d2) comparing the recorded data by the micro controller unit when the footstep of a user running or walking on the treadmill belt reaches a predetermined number and obtaining a computation result from a computation using the proportional integral derivative controller and the load predictor according to a load prediction compensation algorithm; and   d3) resetting the control signal subject to the computation result for regulating the output status of the motor.