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Dual SCR chopper as a motor controller for an electric car

Rippel, Wally E. (1971) Dual SCR chopper as a motor controller for an electric car. IEEE Transactions on Vehicular Technology, 20 (2). pp. 23-26. ISSN 0018-9545. doi:10.1109/T-VT.1971.23474.

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Despite recent advances in solid-state controls for electric cars, chopper-induced problems still exist: commutation and ac losses are significantly high, the chopping action induces losses within the power source, and large ripple components in the chopper output cause increased rms losses at the motor. The author's dual chopper, two conventional choppers in parallel, reduces these problems. The duty cycle generated by the firing circuit is feedback controlled so that the load current remains proportional to control output. The dual chopper operates in a three-in-one system: in the first mode, the batteries charge at high rates; the second mode controls the amount of power flowing from battery to motor; and in the third or regenerative braking mode, the chopper transfers energy from the motor to the battery.

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Additional Information:© 1971 IEEE. This paper was originally prepared for publication in the January 1971 issue of the IEEE Student Journal.
Issue or Number:2
Record Number:CaltechAUTHORS:20170810-165734592
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Official Citation:W. E. Rippel, "Dual SCR chopper as a motor controller for an electric car," in IEEE Transactions on Vehicular Technology, vol. 20, no. 2, pp. 23-26, May 1971. doi: 10.1109/T-VT.1971.23474
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80269
Deposited On:11 Aug 2017 19:06
Last Modified:15 Nov 2021 17:53

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