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Electric vehicle having improved battery reconnect

  • US 3,923,116 A
  • Filed: 01/02/1974
  • Issued: 12/02/1975
  • Est. Priority Date: 01/02/1974
  • Status: Expired due to Term
First Claim
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1. A method for switching the poWer batteries connection to the armature of the drive motor in an electric vehicle driven by a separately excited direct current motor from a low voltage connection to a high voltage connection wherein the armature time constant is relatively short and the field time constant is relatively long comprising the steps of:

  • preventing current flow into the batteries;

    increasing the current flowing through the separately excited field windings; and

    completing the series connection of the batteries when field excitation reaches a predetermined level of approximately 100% of full field current.

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