Tamura Current Sensors: Precision, Innovation, and Reliability

Tamura Corporation: A Legacy of Excellence in Current Sensing

Since its founding in 1924, Tamura Corporation has been a pioneer in electronic component innovation, entering the current sensor market in 1956, specializing in high-performance current sensors for industrial, automotive, and energy applications. With cutting-edge technology and a commitment to precision, our sensors offer superior accuracy, reliability, and efficiency in power electronics.

Advanced Technologies Behind Tamura Current Sensors

Tamura integrates multiple technological advancements to ensure optimal sensor performance:

• Transformer Technology: High-precision sensing utilizing electromagnetic principles.
• Circuit Design Technology: Optimized designs for improved efficiency and reduced power loss.
• Potting Technology: Enhanced durability and protection against environmental factors.
• EMI/EMC Solutions: Minimization of electromagnetic interference for stable operation.
• Market Awareness: Tailored solutions addressing industry-specific needs.

Applications of Tamura Current Sensors

Tamura’s sensors are designed for a wide range of industries, ensuring precision and reliability in diverse applications:

• Robotics: High-precision motion control and feedback systems.
• UPS (Uninterruptible Power Supply): Ensuring stable power distribution and monitoring.
• Photovoltaic Power Generation: Efficient energy conversion and grid integration.
• Wind Power Generation: Monitoring and optimizing wind turbine performance.
• Energy Storage Systems: Managing energy flow for enhanced efficiency.
• Motor Controllers: Improving efficiency and accuracy in industrial motors.
• Welding Machines: Precise current measurement for high-quality welding processes.
• Grid & SVG (Static Var Generator) Systems: Optimizing power factor correction and grid stability.
• General-Purpose Inverters: Supporting industrial and commercial power applications.
• EV Charging Stations & Energy Storage: Enabling safe and efficient power management in electric vehicle infrastructure.

Understanding Open-Loop and Closed-Loop Current Sensors

Tamura’s product lineup includes both open-loop and closed-loop current sensors, each designed to meet specific application requirements.

Open-Loop Current Sensors

Open-loop current sensors use Hall effect technology to measure current flow. These sensors provide a cost-effective solution with lower power consumption, making them ideal for general-purpose inverters, motor controllers, and energy storage systems.

• Operation Principle:

1. The sensor detects the magnetic field generated by the current.

2. The characteristics such as linearity and temperature drift depend on the Hall element.

• Product Lineup (Open-Type, Dual Supply):

L55S, L51S, L40S, L34S, L07PL18P, L08P, L37S

• Product Lineup (Open-Type, Single Supply):

L51S, L01Z, L34S, L07PL18P, L32PL31S

Closed-Loop Current Sensors

Closed-loop sensors provide higher accuracy and faster response times compared to open-loop models. These sensors use a feedback mechanism to enhance measurement precision, making them suitable for applications demanding superior accuracy, such as robotics, uninterruptible power supplies (UPS), and high-performance motor controllers.

• Closed-Loop (Hall Effect) Operation Principle:

1. The output current is proportional to the measured current.

2. Offset current depends on the Hall element, and accuracy is improved with secondary winding turns.

• Product Lineup (Closed-Loop, Hall Effect):

S21S, S20S, S23P, L37S, S29S, S30S, S27S, S22P

Closed-Loop (Fluxgate) Current Sensors

Fluxgate current sensors replace the Hall element with a highly saturable probe coil, delivering ultra-high accuracy and stable temperature output. These sensors are designed for critical applications in power grids, electric vehicle charging stations, and high-precision welding systems.

• Operation Principle:

1. Uses a probe coil instead of a Hall element to minimize offset errors.

2. Achieves extremely high accuracy and temperature stability.

• Product Lineup (Closed-Loop, Fluxgate):

F23P, F26P, 150S12, F01P, F02P, F03P

Tamura’s Commitment to Innovation

Tamura Corporation continues to push the boundaries of current sensing technology through dedicated research and development. Our products are designed to meet the evolving demands of modern industries, ensuring reliability, efficiency, and performance in power electronics.

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