The function of this drive technology: 

• Opening and closing the door plus position recognition and holding open

Technical details of this drive technology:

• multi-stage planetary gearhead
• max. torque: 100 Nm
• planet wheels have strengthened bearings in the third stage (bearings both sides)
• the individual planetary stages are additionally ball bearing-mounted in the axial direction
• regenerative current brake mounted directly on the motor
• motor with integrated encoder
• reinforced bolt-fixing between ring-gear and carrier
• minimal restoring torque of 5 Nm at -25 °C
• serviceable temperature range: -25 °C to +80 °C
• shot-blasted drive shaft

How the drive works:
Planetary gearhead Performax^® 52 with permanent magnet DC motor type BCI 63 x 55 for 24 V is designed to drive bus ramps in and out electrically. This drive technology is extremely robust, durable and energy efficient. It ensures that the passenger is able to enter and leave the bus in comfort, practically barrier-free.

Technical details of planetary gearhead Performax^® 52:

• Reduction: 30:1
• Nominal output speed: 110 U/min.
• Nominal output torque: 6.5 Nm
• Nominal power output: 75 W
• Max. permissible axial force: 500 N
• Max. permissible radial force: 350 N
• Lifetime: 5,000 h operating ratio
• Protection rating: IP 40

Technical details of permanent magnet DC motors type BCI 63x55:

• Nominal voltage 24 V
• Nominal rotation speed: 3,300 U/min.
• Nominal torque: 270 Ncm
• Nominal power output: 93 W
• Idle-running speed: 3,600 U/min.
• Protection rating: IP 40

The challenge:
Nowadays, assisted access systems are compulsory for public transport buses. This is the only way to make sure every passenger is able to use the bus without hindrance. The electrically driven ramps used are subjected to daily stresses and must always function with reliability. Planetary gearhead Performax^® 52 with permanent magnet DC motor type BCI 63 x 55 from ZEITLAUF^® antriebstechnik ensures that these bus ramps can be driven in and out electrically, with reliability. In so doing, it meets the strict requirements placed on such a drive unit. The design features of Planetary gearhead Performax^® 52 with permanent magnet DC motor type BCI 63 x 55 from ZEITLAUF^® antriebstechnik include low reverse torque (good efficiency rate), high radial loads plus long lifetime as well as extreme smoothness, toughness against vandalism and problem-free operation at temperatures ranging from -20°C to +80°C.