- In the industrial automation area, the new TP2000 series controller with 1ms high-speed response and open architecture has become the focus of on-site attention; The GD28 series frequency converter, GD350A series dedicated frequency converter, and permanent magnet synchronous motor products demonstrate the continuous breakthroughs of Envision in motor drive and control performance. There are also flagship products such as GD5000 high-voltage frequency converter, GD880 engineering transmission series and liquid cooled frequency converter