Ultra-small coreless current sensor
CQ-330x is a coreless current sensor with withstand voltage 3kV while being very small. By adopting AKM specific compound semiconductor Hall element, the sensor unit boasts a high sensitivity (~ 325mV/A). Among open-type current sensors, CQ-330x has achieved the industry's highest level of response rate (0.5usec)*, accuracy (1.3%)* and low noise. Compared with a conventional current sensor or the combination of the resistor and the isolation amplifier, miniaturization and cost reduction of the inverter-circuit for the servo motor can be achieved.
Semiconductor magneto resistive element for absolute encoder
The semiconductor magnetic resistance element is designed for magnetic absolute encoder. Include 3 elements for Master / Nonius / Segment (using principle of vernier calipers). A small and thin absolute encoder, specific for the high accuracy servo motor application, can be realized by use of a slit disk.
Ultra Small Analog Front-End for Encoder and A/D converter for current sensing
Recent years, the demands of downsizing are increasing for industrial motors. AKM will launch AK9240, an ultra-small 2-channel analog front-end, and AK9231, a small 2-channel ADC.
An analog front-end of small and high resolution encoders can be designed with these devices. They are suitable for optical encoders and magnetic encoders, using AKM semiconductor magnetic resistance elements.
A current sensor is used on vector control and over current detection in servo drivers and industrial AC drivers. By using AK9223 for these functions, a small and high performance motor system can be designed.