Product Description

The introduction of the BL class of brushless servo motors from Okuma was significant, as they performed excellently across all their industrial applications and were very maintainable. However, in order to keep up with newer trends and performance benchmarks within the automation industry: especially with an increasing demand for higher precision in servomotors, Okuma designed the type-A BL-D series of servo drives to maximize the performance range of the brushless BL motors. The BL-D75A is a variant of the type-A BL-D series of servo-drives, which is optimized for servomotor with medium output power requirements.

For the BL-D75A, the value ‘75’ in its name indicates its power unit capacity. This is proportional to its output power range, along with its capacity for producing and amplifying the required current signals for the connected servomotor. There are a few BL-type servomotors that fall within this power range, and they include the following: BL-MQ120E-20, BL-MH151E-20, BL-MS125E-20, BL-MS125E-30, BL-MQ180E-20, BL-MQ120E-30, BL-MS140E-30, BL-MU180E-20, BL-MH201E-20, BL-MH301E-20, BL-MH301E-12, BL-MH401E-12, BL-MH201E-30. Since this servo-drive is a single-axis unit, it can only be connected to one servomotor at a time. Basically, while incorporated within the multi-axis control CNC BDU-A unit, up to six BL-D**A servo amplifiers can be connected to the same DC source at a time. This can easily increase throughput in automation, however, with only one compatible motor connected to a servo-amplifier per time.

This servo-drive uses a pulse modulation technique for regulating speed and torque outputs in servomotors. While the recommended operating conditions with regards, input electrical parameters like voltage and frequency are meant to be applied at all instances of operating this drive, it comes with extra circuitry for protecting the servomotor from common electrical damages and faults. This further extends the reliability of an already optimized product (BL servomotors) from Okuma.