Powerful and Precise

Galil is proud to introduce a new higher power multi-axis servo drive with sinusoidal commutation: the AMP-43740. Building on Galil’s 600W AMP-43540, the new AMP-43740 is designed for applications with brushless motors that require greater continuous or peak current. 

Internal Amplifier and Drive Comparison

The AMP-43740 contains four 1200W digital transconductance amplifiers for driving brushless motors with sinusoidal commutation, a 100% increase in power rating of the AMP-43540. Each of the AMP-43740’s amplifiers can drive motors operating at up to 16 Amps continuous, and 30 Amps peak at 20-80 VDC. This allows the use of larger brushless motors to meet needs of almost any application.

The gain settings of the amplifier are user-programmable at 0.8, 1.6, and 3.2 Amp/Volt. Both the switching and sampling frequencies are 20 KHz, with a closed-loop current loop bandwidth up to 2.5 kHz. The AMP-43740 also offers protection for over-voltage, under-voltage, over-current, short-circuit, and over temperature.

Trapezoidal commutation can have discontinuities and produce a torque ripple. This is because the torque characteristics of the motor are only taken into account in six zones. With sinusoidal commutation, the torque characteristics of the motor are mapped to all positions, resulting in continuous commutation with no torque ripple. As an additional benefit of sinusoidal commutation, Hall sensors are generally not required with Galil’s initialization commands.

The AMP-43740 4-axis drive is available as an option for Galil’s DMC-500x0 EtherCAT Master, and DMC-40x0 Accelera motion controllers. Designed to minimize space, cost and wiring, the drives reside directly inside the controller enclosure for a compact profile. The new AMP-43740 is slightly larger than Galil’s lower power amplifier options. In a 1-4 axis configuration the AMP-43740 is 8.05” x 9.25”. In a 5-8 axis configuration it is 11.5” x 9.25”.

Two 4-axis drive units can be specified inside 8-axis controller models. A shunt regulator option is also available. The U.S. list price of the AMP-43740 4-axis 1200W drive is $1300 in single quantity and $800 in 100 quantities.