Lenze's smd inverters have helped reduce costly downtime caused by motors burning out on PVA emulsion pumps at Grosvenor Chemicals, a manufacturer of a diverse range of chemicals and pharmaceutical intermediates in the UK.
The PVA emulsion pumps are used in the production of glue at Grosvenor's Huddersfield factory. The pumps were previously driven by fixed speed electric motors, which had problems resulting from the variation in PVA emulsion viscosity across different products, causing motor overloads particularly on restarts, premature motor failures and costly downtime.
Lenze smd inverters were supplied in very compact panels as a solution. Featuring a very small footprint, the inverters are rated at 5.5kW and 7.5kW, and equipped with a footprint filter to meet RFI class 'A' requirements. A separate door-mounted keypad allows the operators to change the pump speed easily.
Local company Westin Drives, a StockDrive partner for Lenze frequency inverters supplied the successful solution based upon smd inverters to Grosvenor Chemicals. Westin offers expertise in providing discrete or integrated solutions across motors, geared motors and inverters.
Lenze smd frequency inverters provide a soft start facility for the pump motors, and can hold 150% rated torque for up to 60 seconds. Additional protection is provided via their built-in thermal motor monitoring, which allows a shutdown with error message if the motor begins to overheat without causing any motor change.
Lenze's 'smd' range of AC drives brings inverter drive functionality and efficiency to a wider range of simple motor control applications.
Key advantages of smd inverters:
- Breaks through the existing price barrier for AC drives while retaining high functionality and offering easy to use features
- Power ratings for the drives are from 0.25kW to 22kW with a range of international voltage options
- Innovative EPM memory chip can cut programming and service time by 90% for OEM manufacturers and systems integrators