CSNE151-100 Closed-loop Current Sensor For Automotive Electronics Robot

CSNE151-100 Closed-loop Current Sensor For Automotive Electronics Robot

Working Principle:

Based on the magnetic compensation principle, it belongs to a closed-loop current sensor of magnetoresistive or Hall effect type. Using the zero-flux method (feedback system), it continuously controls the magnetic flux in the sensor core to zero. The current required to balance the zero flux is proportional to the primary current flowing through the conductor. This closed-loop current, as the device output, reflects the primary current scaled down by the turns ratio of the primary and secondary windings, which can be converted to voltage via a resistor.

Electrical Parameters:

• Rated Current: 25A.t rms.
• Measurement Range: 0~±50A.t rms, 0~±90A.t rms.
• Measurement Resistance: At ±15V power supply, 54360Ω for max ±25A, 54150Ω for max ±50A, 5454Ω for max ±90A.
• Analog Output Current: 25mA.
• Turns Ratio: 1-2-3-4:1000.
• Accuracy: +25°C @25A: 优于 ±0.25% In (better than ±0.25% of rated current).
• Supply Voltage: ±12 to 15V (±5%).

Accuracy - Dynamic Parameters:

• Zero Offset Current: @+25°C: 优于 ±0.15mA (better than ±0.15mA).
• Offset Current Temperature Drift: 0~70°C: 优于 ±0.6mA (better than ±0.6mA).
• Linearity: 优于 ±0.2% (better than ±0.2%).
• Response Time: @50%: 优于 200ns (better than 200ns).
• Bandwidth: DC to 200kHz.
• di/dt Accurate Tracking: 〉50A/μs.

Other Parameters:

• Electrical Insulation: 50Hz/1min, 5kV.
• Operating Temperature Range: -40°C…+85°C.
• Storage Temperature Range: -40°C…+90°C.
• Current Consumption: 12 + output current mA.
• Secondary Internal Resistance: (+70°C) 66Ω.
• Primary Internal Resistance: <1.25/turn mΩ.
• Weight: 14g.
• Sensor Housing Material: PBT with 30% glass fiber (UL94-V0 grade).

Product Features:

• High measurement accuracy based on magnetic compensation principle.
• Capable of measuring DC, AC, or pulsating current, with wide applicability.
• Electrical isolation between primary/secondary circuits, ensuring safety and anti-interference.
• Small zero offset current and low temperature drift, maintaining stable performance in different temperature environments.
• Short response time, enabling fast and accurate tracking of current changes to meet measurement requirements for rapidly varying currents.

Application Fields:

• Industrial Sector: Current monitoring and control for equipment such as motors, frequency converters, and welding machines to ensure normal operation and safety.
• Automotive Electronics: Used in battery management systems for electric vehicles, automotive engine control systems, etc., to monitor current for energy management and fault diagnosis.
• Communication & Networking: Monitors current in power systems to ensure stable power supply and efficient energy use for communication devices.
• Robotics: Applied in robot drive systems to accurately measure motor current for precise control of robot movement.