Forty
years ago, DC motors were the Crane industry when variable speed was required.
These were found in many crane applications including Hoist & Luffing
applications and the shipping industry. However, they needed a maintenance
schedule including regular brush changes and carbon removal from the windings. Nowadays,
there are better variable speed options using AC motors and inverter control. We
have a lot of experience of upgrading crane DC motors to AC motor.
The main advantages of AC motor
inverter systems over DC are:
·
Reduced maintenance costs
·
Reduced production downtimes
· Improved efficiency (typically 15-25%)
· Standard products with short lead times
