Stock Status: Available

4QD-200D and 4QD-300D ranges of motor speed controllers for 24v, 36v and 48v motors. They are designed to give currents in the range 100 to 300 amps making them probably the most powerful controllers in their price range. Although small they are fully electronic and need no external relays whatsoever. They have many fail-safes built in for reliable long time use and misuse.

The controllers are wide supply voltage range, 36v and 48v both working also down to below 24v, so there is no separate 24v version, the 36v version should be used.

2 basic models are available in several voltage options:
4QD-200-36/48: 210 amps cold
4QD-300-36/48: 320 amps cold

The 4QD-200 and 4QD-300 are full Four-Quadrant chopper drivers suitable for speed control of battery operated motors up to 300A and voltages between 24 and 60. They give full control of forward and reverse acceleration and braking.

Input is suitable for a joystick (center zero) or for a single ended speed pot plus separate reversing switch (mode is selected on board by a moveable link). There is an on-board adjustment to alter input sensitivity. Alternatively an external pot or switch can be added to give a user top-speed control.
Also on board is an adjustable torque limit, which limits the continuous motor current, to avoid overloading smaller motors.
You can buy with confidence as the controllers come with a detailed instruction manual and we give full technical service and advice, covered by the 12 month guarantee.

For complete specifications, please download the 'Details' PDF and/or Owners Manuals. For information on the interface you will need to control this ESC, click here.