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Adjustable Frequency Drives
A.C. Adjustable Frequency Drive (AFD) Theory:
A.C. squirrel cage induction motors are typically characterized as constant speed when they are run from a 60Hz power source. If the source frequency can be adjusted, the motor speed and associated motor characteristics can be controlled to various levels of performance. Variable speed crane drives use existing A.C. power and convert it to D.C. via an electronic technique known as pulse width modulation (PWM). The Direct Current is then turned back into variable frequency alternating current (VFAC). With variable frequency A.C., the motor is now capable of performing to torque, efficiency or speed characteristics that are not typically associated with standard A.C. systems.
There are huge benefits in increased operating control and reduced maintenance costs by upgrading your crane controls to adjustable frequency drives. When switching to an AFD, conventional control systems such as resistor banks, timers and fluid couplings can be done away with. In addition, contactor arcing is eliminated and brake wear is reduced resulting in longer service life on your crane equipment. In place of these eleminated maintenance items frequency drives provide further reductions in wear through dynamic braking, controlled acceleration and deceleration, and motor over-current and over- temperature protection, which are inherent features of frequency drives.
AFD's also allow more operating versatility! Their flexibliity in speed selection and slower speeds offer precise load positioning and reduced load swing.
General Advantages of Frequency Drives
Magnetek's IMPULSE®Series Crane Controls have a proven track record for providing unmatched performance and reliability to the overhead material handling industry. They are designed with versatility, reliability, and safety in mind. Models range from more basic, compact low cost units to advanced units featuring exclusive crane and hoist software. Their drives meet the demands of Material Handling applications from 1/4 HP to 1500 HP.
| Impules® G+ Series 3 |
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IMPULSE® Series 3 drives have long been the gold standard in crane controls for the material handling industry. Now advanced safety and performance features make them even better! Here's just a few: copy, store, and write parameters from keypad, electronically swap motor leads for reverse operation, and automatically stores the last ten faults with trace data. Plus, you still get the same great features you've come to rely on with our IMPULSE® Series 2 drives. The digital keypad display makes programming and troubleshooting simple and straightforward. Safe Operating Windows™, Load Check™, and Multi-level Password Protection reduce the possibility of unsafe operating conditions. The IMPULSE®•G+ Series 3 is designed for use on traverse motions and on worm gear or mechanical load brake hoists. It can also be used as an open-loop vector crane control.
 Impulse G+ & VG+ Series 3 Catalog
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| Impules® VG+ Series 3 |
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Magnetek's IMPULSE® VG+ Series 3 Adjustable Frequency Crane Controls incorporate the latest in advanced control technology to maximize the performance and safety of your material handling system.
IMPULSE® Series 3 drives have long been the gold standard in crane controls for the material handling industry. Now advanced safety and performance features make them even better! Here's just a few features: 5 lines of characters makes it easier to navigate and read diagnostics, additional alarm and fault codes makes troubleshooting easier, and the load share fucntion allows you to run two motors on the same mechanical shaft.
Plus, you still get the same great features you've come to rely on with our IMPULSE® Series 2 drives. The digital keypad display makes programming and troubleshooting simple and straightforward. Safe Operating Windows™, Load Check™, and Multi-level Password Protection reduce the possibility of unsafe operating conditions.
The IMPULSE®•G+ Series 3 is designed for use on traverse motions and non mechanical load brake hoists. It can also be used as an open-loop vector crane control.
Impulse G+ & VG+ Series 3 Catalog
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| Impules® G+ Mini |
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The low horsepower IMPULSE•G+ Mini is the easiest to program drive to date, with user-friendly standard programming for Basic applications and advanced programming capability for high performance environments. The IMPULSE•G+ Mini is designed with an expanded HP range and an identical dimensional footprint as the IMPULSE®•P3 Series 2 (up to 5HP) and a smaller footprint beyond 5HP.
All this, plus assured reliability and lower cost make the IMPULSE•G+ Mini Adjustable Frequency Crane Control the product of choice for your overhead material handling needs.
Impulse G+ Mini Catalog
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| Power Electronics Micro-Speed CX |
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Micro-Speed CX is the only variable voltage, variable speed "scalar" drive designed specifically for the overhead crane industry. They feature Gang-Set instant programming and rugged enclosures. Units are available with up to 5 speeds, including infinitely variable modes. Select Micro-Speed CX for high horsepower, high current applications. Smart-Move offers many of the features of Micro-Speed CX for smaller, low horsepower applications.
PE Microspeed General Catalog
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| Power Electronics Micro-Speed MV |
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For the most accurate, advanced Variable Frequency drives look to Micro-Speed Multi Vector. The multi vector is an advanced "closed loop" VFD for superior "no load brake" style overhead hoist control. With its high duty cycle rating and rugged design, all types of A.C. single speed and wound rotor hoists can now operate with safe multi-speed capability, regardless of the load. One drive for all CMAA duties A through F.
Micro-speed® Multi-Vector MV® drives have Gang-Set® instant programming, all internal braking electronics (no expensive extra modules to purchase-resistors external), no external interface cards to fail, and very robust hardware and software. All this makes the MV® drive the answer for you. Available for new and retrofit hoists.
PE Microspeed General Catalog
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