Flexsine® (60 - 120 Hz)
CTM Magnetics FlexSine sine wave filters are designed for optimal performance with both line frequency, 60 Hz, and 120 Hz motors. The FlexSine product line is engineered for today’s common 60 Hz induction motors with the built in capability of operating higher frequency permanent magnet motors. Buy for today, prepare for tomorrow.
CTM vs. The Competition
- Operates 0 – 120 Hz with no derate
- No common mode noise
- Highly reliable film capacitors
- Integrated cooling system
- Fully liquid cooled option
- Military grade shock & vibrations
- High frequency derate required
- Produces harmful common mode noise
- Electrolytic capacitors
- Inefficient silicon steel inductors
- Cooling system not included
- Air cooled only
- Low shock & vibration capabilities
- 120 Hz capability
- No derate
- Smallest size & optimized cost
- Thermally protected capacitors & inductors
- Highly efficient patented inductors & capacitors
- No common mode noise
Plug & Play
- Simple 3-in/3-out connection
- No additional cooling required
- Dust, wind, rain, weather proof (NEMA 3R)
- -50 °c - +50 °c
The Optimal Solution for High Frequency Motor Protection
High Frequency Motor Protection:
Harmful square waves, voltage spikes, and harmonic distortion are all filtered from the inverter output, reducing motor heating, wear, and winding stress, providing critical motor protection. With the rise of high frequency/ high speed permanent magnet motors the need for higher frequency sine wave filtering has increased. CTM Magnetics FlexSine sine wave filters are designed to meet this rising need without requiring costly derates that negatively effect system size, efficiency, and cost.
Maximum Motor Lead Length:
Damaging voltage waves occur when motor lead lengths reach a characteristic length. These reflected voltage waves can cause damage to cable insulation and motors. By filtering the drive produced PWM waveform to a near perfect sine wave, CTM sine wave filters minimize harmful voltage, allowing for longer motor lead lengths (up to 15,000 feet in certain applications).
Stop Rewinding Motors:
Installing a CTM sine wave filter eliminates harmful voltage spikes, reducing insulation stress. CTM sine wave filters lessen harmonic current distortion, thereby minimizing unnecessary motor heating. By reducing winding stress and motor heat (two primary causes of motor winding failure), motor winding breakdown and failure is greatly reduced, minimizing the need to constantly rewind motors.
Extended System Life and Reliability:
CTM sine wave filters greatly reduce voltage stress and excess heat not just for the motor, but for all other load side components, greatly extending the life and reliability of the entire system.
FlexSine™ Product Specs
480 V ±10%
0 - 120 Hz (Contact CTM for operating unit above 120 Hz)
3.6 kHz Nominal | 3.0 kHz Minimum (2.0 kHz Minimum available by request)
50 A - 1,500 A (Air Cooled) | 50 A - 2,000 A (Liquid Cooled)
Open Chassis | NEMA 3R Cabinet
Motor Cable Length
Up to 15,000 feet
cЯUus 1446 Standard | UL 508A
150% rated current for 1 minute (Air Cooled)
200% rated current for 1 minute (Liquid Cooled)
Ambient Temperature Range
Maximum: 50 °C (122 °F) (Air Cooled) | 65 °C (149 °F) (Liquid Cooled)
Minimum: -40 °C (-40 °F) (Air & Liquid Cooled)
Preventative measures should be taken to ensure the coolant does not freeze in the system.
Get a Custom Design in just 2 Business Days
We are here to work with you every step of the way.
Other Sine Wave Filters
GridHawk® harmonic filters are engineered to eliminate harmonic distortion and enhance power quality.
CTM input and output reactors mitigate harmonic distortion on the input and output of VFDs.
CTM 3-phase transformers are the ideal choice when extreme shock & vibe capability or liquid cooling is required.