Woolim Technology Co. Ltd. (South Korea) debuted its KPR-043A3 Series of cylinder coreless dc vibration motors, which feature low noise and power consumption, and are rated at 20,000 rpm (no-load). The KPR-143A3 has a rated voltage of 3 V, a no-load speed of 20,000 rpm and current of 45 mA.
At full-load, the series has a torque of 0.74 g-cm, a current of 75 mA, a speed of 11,000 rpm, and a terminal resistance of 28 ohms ±15 percent. Rated at 1.3 V, the KPR-043A3 has a no-load current of 40 mA and a speed of 18,000 rpm. At full-load, the device has a torque of 0.42 g-cm, a current of 70 mA, a speed of 9,000 rpm, and a terminal resistance of 13 ohms ±20 percent.
