VFD-DD Series: Door Control Drive

The Delta DD series elevator door-control drive is an intelligent drive with outstanding features. These include a modular design for easy removal and installation of terminal blocks, a safety power switch and a built-in digital keypad for quick operation control. The drive has four control modes for opening and closing doors. The distance-control mode is a sensor-free system with an encoder which counts PG pulses to detect the position from the speed. The speed-control mode uses sensors to control the door opening and closing actions. The multi-step speed control mode generates a smooth door opening-and-closing curve using PLC control. The Delta DD series elevator door control drive provides a complete solution for elevator door control.



  • Door width is determined automatically and is recorded in related elevator parameters.
  • Smooth door re-open curve reduces vibration
  • DEMO mode
  • PM motor A, B, Z, -Z and Delta@@s ECMD-B9160GMS series PM motor
  • Supports open collector and voltage output encoder (5~12VDC) for induction motors
  • Blockage detection, even if the hardware safety device has failed, VFD-DD can re-open the door according to current detection.
  • Precise torque detection, keeps the door open/closed, when the door open/close time exceeds warning, it forces door open.
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