TorQmax™ delivers superior AC VVVF drive performance for geared and gearless applications. Designed specifically for MCE’s PTC-AC Series M and IMCAC control systems, TorQmax is the result of a multi-year development partnership with a leading German drive manufacturer. TorQmax drives have a compact profile, a notable absence of audible motor noise and simple, user-friendly adjustment.

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Benefits

Performance
TorQmax high performing drives have refined motion control across the full speed spectrum— and virtually eliminated takeoff lag associated with AC elevators. The car moves away from the floor immediately when door lock contact is made because TorQmax drives build required magnetic flux within 100 milliseconds; a significant advancement over AC drives that may take over one second to build flux. The smooth operation of the TorQmax drive—through acceleration, contract speed and deceleration—helps ensure optimal passenger comfort.

Simplicity
Customized software and preset standard parameters minimize installation time—providing a significant level of simplicity to TorQmax drives. A few simple adjustments (for most applications) enable the car to run at contract speed. And all parameters are set and displayed in common elevator industry units of measure—no conversion charts or interpolation are required.

Reliability
Since 1983, Motion Control Engineering has developed a reputation as the Premier provider of advanced, non-proprietary elevator control systems in the world. MCE reliability is designed into every product and is supported with unprecedented levels of customer service. MCE’s long list of satisfied customers includes the most trusted names in the elevator industry.

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Features

16K Pulse Width Modulation
TorQmax uses leading edge 16K PWM technology to full advantage. Unlike previous technologies, PWM uses sinusoidal pulse-width modulation. A high frequency triangle carrier wave is compared with a three phase sinusoidal waveform. The IGBT power devices in each phase are switched on where the sine and triangle waves intersect. The amplitude and frequency of the output voltage are varied using the amplitude and frequency of the reference sine waves.

Powerback AC Regeneration
The MCE Powerback AC Regeneration system recaptures elevator overhaul energy for other uses. This energy is traditionally dissipated in the form of heat through resistors located in the machine room. By enabling overhaul power to be reused, Powerback eliminates unnecessary machine room heat. At the same time, Powerback reduces machine room cooling requirements and associated operating costs.

Reuse high slip motors
The TorQmax closed loop drive with encoder allows even existing high slip AC motors to be reused—putting quality elevator performance within reach without motor replacement.

EMI/RFI compliant
TorQmax Pulse Width Modulation is EMI/RFI friendly technology. TorQmax meets stringent European Union emissions standard EN12015 and immunity standard EN12016. Emission standards establish limits for generation of conducted or radiated energy that could otherwise interfere with other equipment. Immunity standards measure resistance to disruption by energy from external sources.