Curtis Controllers

Last Updated: 10/03/09

Image courtesy of InnEVations

Curtis controllers are manufactured by Curtis Instruments Inc.

1221B

  • Operating voltage: 72-120 Volts DC
  • Maximum current: 400 Amps
  • 15 KHz silent operation
  • (no longer in production)

1221C-7401

  • Operating voltage: 72-120 Volts DC
  • Maximum current: 400 Amps
  • 1.5/15 KHz switch frequency operation, audible as a whistle at low speeed.

1231C-7701

  • Operating voltage: 72-120 Volts DC
  • Maximum current: 550 Amps
  • 1.5/15 KHz switch frequency operation, audible as a whistle at low speeed.

1231C-8601

  • Operating voltage: 96-144 Volts DC
  • Maximum current: 500 Amps
  • 1.5/15 KHz switch frequency operation, audible as a whistle at low speeed.

Curtis controllers are available from most EV parts suppliers. Follow this link for a current list.


code by jerry