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Gold/Mining/Energy : Winspear Resources

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To: marcos who wrote (26729)	9/17/2000 6:17:08 AM
From: E. Charters	Read Replies (1) of 26850

Regenerative braking is simple actually. It functions mechanically somewhat like the Jake brake in diesels or the eddy current brake on street cars but takes the electricity so generated and puts it back in storage batteries. Using the same motor that is motive to the wheel implies routing the current that is created in the circuit to the batteries. This shunt is liable to overload and must be designed carefully. It is one thing to generate resistance in a device and the circuit that controls it and another to take that power across a cell when the same direction of current supplies power to the motor. It might be done with a bridge circuit and diodes or a reliable switch with resistive control. The brake could be a caliper device that clamps copper plates close to a spinning magnet to cause induction to slow the wheel. The current draw off could save energy. Such a device would not require switching and would be very reliable. Switch wear and corrosion would allow brake failure in other systems. Power input braking is diffiicult to control as anyone who has downshifted on ice will tell you. It is not as precise as direct force and would require a tuning circuit that controlled the force with precision. EC<:-}

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