A06B-6117-H105 Fanuc Servo Amplifier Module A06B6117H105 A06B-6117-H105

The Fanuc A06B-6117-H105 is the AiSV-80, a single-axis alpha i high-voltage (HV) series servo amplifier module rated at 19A continuous output from a 5.5kW / 283-339V DC bus input. The A06B-6117 series is the 400V infrastructure version of Fanuc's αi (alpha i) servo module family.

The fundamental engineering advantage of the HV series applies at high motor power ratings: delivering the same mechanical output power at 400V supply instead of 200V halves the current demand from the incoming AC supply and the bus bar distribution — reducing cable cross-sections, connector sizes, and I²R distribution losses.

HRV3 (High Response Vector 3) is the third generation of Fanuc's high-speed current regulation algorithm, reducing the servo current loop cycle time and improving the sinusoidal quality of the output current waveform. For precision contouring operations — especially circular interpolation, corner tracking, and high-speed die-mold machining — the tighter current regulation of HRV3 reduces torque ripple at the motor shaft, which translates directly to reduced velocity ripple in the axis motion and better surface quality on the machined component.

The A06B-6117 series exists because not all industrial sites operate on 200V three-phase. In regions where 380-480V three-phase is the standard plant infrastructure, connecting a standard 200V alpha i system requires a step-down transformer.

The HV series eliminates this transformer: the alpha i HV PSM connects directly to the 400V supply, and all A06B-6117 HV series SVM modules draw from the resulting HV DC bus. The motors connected to HV servo modules are the HV-rated variants of Fanuc's alpha i servo motor family, with 400V-rated windings.

This architecture means the A06B-6117-H105 cannot be substituted with a standard A06B-6114-H105 (200V series) or vice versa — the HV and standard series draw from different DC bus voltage levels.

The HRV3 algorithm is enabled at the CNC control level through a servo software option. When the 30i or 31i control has HRV3 enabled, it uses the A06B-6117-H105's higher-bandwidth current regulation capability to run the servo current loop at a shorter cycle time than HRV1 or HRV2.

The practical effect on the machine tool is visible in high-speed contouring: corner rounding during acceleration/deceleration transitions is tighter, circular interpolation accuracy is higher at elevated feedrates, and surface finish on continuous contouring paths is smoother.