Variable frequency drives (VFDs) or variable speed drives (VSDs) regulate the rotational force and speed of electric motors by changing the frequency of the input power to the motor.
By utilizing cutting-edge technology in motor drives and inverters, Calnetix Technologies is able to take full advantage of the latest technology in permanent magnet (PM) motor generators. Calnetix's low and medium voltage VSDs deliver energy efficiency and reliability to drive profitable operations in wide range of industrial applications.
Calnetix variable frequency drive consists of a simple two-level architecture, which has low parts count and high reliability compared to multilevel inverter topologies. The current harmonics are minimized by operating at higher inverter PWM switching frequency. Calnetix inverters utilize both IGBT (Insulated Gate Bipolar Transistor) and SiC (Silicon Carbide) switching devices. SiC is an emerging technology, which allows significantly higher switching frequency at low operating loss.
Calnetix offers power electronics and controls design and manufacturing. Vericycle™ Bidirectional Drives or Adjustable Speed Drives are the ideal choice for any type of high-speed rotating machinery. Calnetix offers both off-the-shelf and custom high frequency variable speed drives and is committed to working in collaboration with our clients to deliver the highest quality products. Some of the key advantages of the Calnetix Vericycle™ Variable Frequency Drives include:
Calnetix’s technological innovations in high-power transistors and permanent magnet motors have increased power capability, reduced size and cost, and made new applications feasible. From electric motor applications to position control applications, Calnetix’s motor drives adjust to the needs of the process and help increase the overall efficiency of the system. The seven standard Calnetix variable speed drives are shown and described below.
Machine Voltage: 0-480 VAC
Machine Current: 60 A (CONT)
Machine Phases: 3
Machine Frequency: 0-2000 Hz
Enclosure Type: NEMA 1
Grid Voltage: 380-480 VAC
Grid Current: 60 A (CONT)
Grid Phases: 3
Grid Frequency: 50-60 Hz
Calnetix is uniquely positioned to offer custom solutions by leveraging our existing technology and advanced engineering capabilities to deliver custom variable speed drive designs that are cost effective, robust and delivered on time. Some of these capabilities include:
Robust control algorithms that are applicable to a large range of applications
Flux based estimator that provides very robust sensorless control of a machine connected to the variable frequency drive
Flexible system architecture, including fully bidirectional operation
Design experience in both adjustable speed drives and permanent magnet synchronous machines that allows for anticipation of risks in a new design
Custom packaging and enclosure designs to meet the harshest of environments and to meet weight and space requirements
Fully integrated team of engineers who are well versed in power electronics design, controls design, embedded software engineering, EM design, thermal design, mechanical stress analysis, materials engineering and compliance engineering
Heat to Power Systems
Hybrid Turbocharger System for Ships
Magnetic Rotary Atomizer for Spray Drying
How Power Electronics Work
Commercializing Medium Voltage VFD that Utilizes High Voltage SiC Technology
Control of a 750kW Permanent Magnet Synchronous Motor