Calculation of motor surge voltage under the use of a surge suppression cable

This paper presents a novel motor surge voltage suppression system which utilizes a newly developed surge suppression cable. The feature of the system is that the surge suppression cable is connected in parallel with the motor terminal those independent from the main cable, and there is no need to connect any passive filter component for suppressing the motor surge voltage. The advantage of this method is that the current capacity of the surge suppression cable does not influenced by the power capacity of the motor drive system. Hence the diameter of the surge suppression cable can be very small, and the surge suppression cable can be included in the main cable sheath. A mechanism of the motor surge suppression on the present system is demonstrated, and also the numerical equation for motor surge voltage is derived by taking the surge voltage transmission phenomenon on the cables into account. The calculated results are coincide well with the experimental results, and the usefulness of the proposed system are verified thorough the 750 W AC drive experimental setup.