Device used for limiting the speed of an electric cart while the cart is turning

A device used for limiting speed of an electric cart when the cart is turning,

• the device being arranged between an axle of front wheels and handlebars of the electric cart;
• the device comprising
• an electrical potential measuring mechanism used for measuring an angle, at which the electric cart is turning;
• a soft constraint connected to an output terminal of the electrical potential measuring mechanism at an input terminal thereof;
• the soft constraint being set such that if an angle value, at which the electric cart is turning, is smaller than a predetermined value, the input angle value will be considered to be a result of slight shaking of the cart, and neglected.
• a speed conversion mechanism connected to an output terminal of the soft constraint at an input terminal thereof;
• a predetermined centrifugal speed value having been already input in the conversion mechanism;
• the conversion mechanism being capable of performing a calculation based on both an input angle value and the predetermined centrifugal speed value to obtain a maximum allowed speed;
• a comparer connected to an output terminal of the speed conversion mechanism at an input terminal thereof;
• and
• a switch connected to a motor of the electric cart at an output terminal thereof;
• an output terminal of the comparer being connected to the switch for controlling the switch;
• two alternative contacts being provided for the switch to selectively touch either one;
• a first one of the alternative contacts being connected to the output terminal of the speed conversion mechanism;
• a present speed value of the cart being sent to both the comparer and a second one of the alternative contacts;
• the comparer being capable of making a comparison between a present speed of the electric cart and an input maximum allowed speed, according to a result of which comparison the comparer will make the switch touch either one of the two alternative contacts such that the cart will run at a smaller one of the present speed and the maximum allowed speed obtained from the calculation;
• whereby speed of the cart can be limited when the cart is turning.