With over thirty years of inverter drives application and installation experience.  Mitsubishi Electric  has extended its series of application guides including Load sharing, Labelling machines and Solar tracking control.  See below or follow the links to the Mitsubishi Electric UK download site.

Load sharing

A load Sharing application is one where there are 2 or more motors mechanically connected to drive the same load. A good example of this is when controlling a long conveyor belt. In theory, if there are multiple motors that are all supplied by the same frequency, they will all output the same shaft speed and, since they are physically connected, they will all share the load evenly.
Differences in loading, friction, tension and other factors mean that some motors will always pull harder and others will be dragged along by the mechanical linkage. As well as affecting the operation of the system, this leads to nuisance tripping and excessive bearing loads at different points and a tendency to stretch a conveyor belt in some places and bunch it up in other places.

Load sharing applications are to be found primarily in heavy industries where large loads need to be transported long distances. Examples include: Long Conveyor runs in aggregates; mining; tunnel boring, and chain conveyors.

Labelling machines
High-speed labeling machines require registration and encoder following in order to  accurately position labels at different speeds. In-line labeling systems such as the machine shown above place labels on block shaped products that move in a single direction. Rotary
labeling machines place labels on cylindrical products that rotate around a central label head.

When more than one label is placed on a product, multiple label heads can be configured with additional servos and sensors. Mitsubishi Electric’s Stand Alone motion controller offers the flexibility to add these intelligent axes, and for additional trend analysis and quality control, a vision system can be used to track defective products and monitor label accuracy.

Labeling machines are in a variety of applications including:
Food & beverage; pharmaceutical; material handling; mailing; bottling and canning, and stationery lines.

Solar Tracking Control

Solar panel tracking systems optimise energy output of photovoltaic panels by positioning them to follow the sun’s path throughout the day.  The sun’s position in the sky varies both with installation location, the seasons, and the time of day. Tracking systems are being used increasingly as purchasers of solar systems understand that the cost of energy over the life of the panel is more important than the initial installed cost per watt.

Recently, the solar industry has been using Levelised Cost of Energy (LCoE) as the main measuring stick of solar power plant efficiency. This figure looks at all costs associated with a solar panel installation over its entire lifespan, including initial installed cost, degradation in panel efficiency over time, and on-going maintenance and trouble-shooting. Compared with fixed-position installations, solar tracking systems lower the LCoE of a solar panel installation, making solar a viable long-term option to other energy sources.

The application focuses on principles used in the following active tracking installations:
Horizontal axes; vertical axes; polar tracking, and two axis mount tracking

Go here to access the three earlier Mitsubishi Freqrol inverter drive applications

Go to  www.999inverters.co.uk