Current & Voltage Sensors for Motor Drives & Industrial Automation
Variable-frequency drives, servo amplifiers, and robotic power stages depend on Contisys sensors for tight torque control, fault protection, and predictable long-term field behavior.
Motor Drive Measurement Challenges
Modern VFDs and servo amplifiers push PWM frequencies into the tens of kHz and operate close to the device SOA to extract maximum torque density. Current sensors must provide bandwidth well beyond the switching frequency, tolerate strong conducted EMI from IGBT/SiC transitions, and protect the power stage within microseconds of a short circuit.
Why Contisys for Motor Drives & Industrial Automation?
Fast Overcurrent Response
Typical response time below 1 µs — enables IGBT/SiC desat protection before device damage.
High Bandwidth
100-200 kHz (-3 dB) bandwidth, supporting high-frequency PWM control loops without phase lag.
EMI-Hardened Design
Internal shielding and low-impedance outputs shrug off conducted noise from fast switching events.
Long-Term Gain Stability
Gain drift under 200 ppm/°C — protects torque constant calibration in field-tuned drives.
Key Use Cases
General-Purpose VFD
Phase current sensing for 3-phase induction motor drives in industrial pumps, fans, and compressors.
Servo / Robotics
High-accuracy current sensing for closed-loop torque control in servo and robotic drives.
Heavy Industrial Drive
High-current bus-bar sensing for MV industrial drives and mining equipment.
Regenerative Drive
Bidirectional current sensing for regenerative braking and energy recovery.
Recommended Products
Sensors optimized for Motor Drives & Industrial Automation applications
Frequently Asked Questions
Need a Custom Solution?
Our engineers can recommend the optimal sensor configuration for your specific Motor Drives & Industrial Automation application.