Tamagawa Resolver

Tamagawa Seiki Co., Ltd. produces a range of highly reliable resolvers (angular position sensors) used across industrial automation, robotics, automotive, and aviation applications. Their key product line is the brushless "Smartsyn" series, known for its robustness, high reliability, and resistance to harsh environments.

Key Features and Specifications

Tamagawa resolvers are favored for their durability compared to digital encoders, as they utilize an analog, electromagnetic principle that is inherently resistant to electrical noise, vibration, and extreme temperatures.

1. Technology: Brushless design using an innovative winding method (Smartsyn) or Variable Reluctance (VR) type (Singlsyn), offering absolute position detection.
2. Construction: Simple structure with only an iron core and coils, similar to an electric motor, providing high reliability and a long, maintenance-free life.
3. Environmental Resistance: Wide operating temperature range (typically -55°C to +155°C for built-in types) and high resistance to shock (up to 100 G) and vibration (up to 20 G).
4. High-Speed Rotation: Built-in types can handle speeds up to 10,000 min⁻¹ (rpm) or more, while shaft types can manage around 6,000 min⁻¹ (rpm).
5. Output Signal: Outputs rotational angles as two-phase AC voltages (analog sine and cosine signals) which are robust against noise and can be transmitted over long distances.
6. Compactness: Built-in/frameless types are available for direct integration into servo motors and direct drives, minimizing the overall size of the motor assembly.

Product Series

1. Smartsyn (Brushless Resolver): The primary industrial series, available in built-in (frameless) and shaft types. It achieves low cost and high productivity through automated winding.
2. FA-SOLVER (Brushless Resolver): Similar to Smartsyn, designed for industrial automation (FA - Factory Automation) applications.
3. Singlsyn (VR Type Resolver): An ultra-thin, single-turn absolute angle detector that is highly reliable and cost-effective, designed for minimal installation space.

Applications

Tamagawa resolvers are used in critical applications where reliability is paramount:

1. Servo Motor Feedback: Essential for precise control of speed and position in servo motors used in robotics and CNC machines.
2. Aviation: Used in flight control systems such as flap/slat position sensors and horizontal stabilizer position sensors due to their high reliability and MIL-standard compliance.
3. Automotive: Increasingly used in electric and hybrid vehicles for motor control feedback.
4. Industrial Automation: General-purpose use in conveyor lines, material handling, and other machinery requiring robust position feedback in harsh conditions.