LTi SO84.143 ServoOne Drive Controller 143A BG6a

The LTi SO84.143 is an ultra-high-power three-phase servo drive in the BG6a housing, offering 143A continuous and 286A peak current. Designed with liquid cooling as standard, it meets the needs of the most demanding industrial motion control applications.

Key Features

• Rated current: 143 A (400V, 8 kHz), peak: 286 A (0-5 Hz)

• Mains: 3 x 230V to 480V AC ±10%

• Switching frequencies: 4, 8, 12, 16 kHz (with derating)

• BG6a dimensions (liquid-cooled): width 380 mm, height 540 mm, depth 228 mm, weight 41.1 kg

• External mains choke mandatory (uk = 2%)

• Integrated brake chopper with optional internal braking resistor

Technical Data

Installation

Mount vertically on a sturdy mounting plate. The BG6a requires significant clearance: minimum 200 mm above and below for air circulation (though liquid cooling reduces cabinet heat). Connect the liquid cooling circuit using 3/8 inch female threads; use drip-free quick-release couplings. The external mains choke is mandatory and must be rated for 143A. Use shielded motor cables with cross-section up to 150 mm². PE conductor must be sized accordingly.

Commissioning

Commission with DriveManager 5. The 7-segment display guides initial steps. After applying 24V control supply and AC mains, enable STO inputs (ISDSH and ENPO). The drive can be controlled via analog setpoint or fieldbus. Parameter sets can be saved to MMC card. For advanced applications, iPlc programming via CoDeSys is supported.

Braking Regeneration

The internal brake chopper can handle up to 79 kW continuous with external 8.5 Ω resistor. For integrated braking, the optional 5 Ω internal resistor provides 4 kW continuous and 135 kW peak. Always wire the resistor’s thermal switch to a digital input to disable the power stage in case of overtemperature.

Applications

Suitable for servo motors up to 75 kW (400V). Typical applications include large extrusion lines, heavy-duty presses, mining equipment, and marine propulsion controls. The 286A peak current delivers exceptional torque and acceleration.

Compliance

Complies with EN 61800-5-1, EN 61800-3, LVD, EMC. UL approval for BG6a with class RK1 fuses (e.g., 3 x 175 A).

The LTi SO84.143 represents the pinnacle of ServoOne power density for extreme single-axis control.