US 11,789,426 B2
Motor control angle sensor, motor control system, and control method for motor control angle sensor
Ryosuke Imai, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Nov. 29, 2021, as Appl. No. 17/536,264.
Claims priority of application No. 2020-198146 (JP), filed on Nov. 30, 2020.
Prior Publication US 2022/0171362 A1, Jun. 2, 2022
Int. Cl. G05B 19/402 (2006.01); B25J 9/12 (2006.01)
CPC G05B 19/402 (2013.01) [B25J 9/12 (2013.01); G05B 2219/34465 (2013.01); G05B 2219/39001 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A motor control angle sensor assembly comprising:
a housing;
a sensor element housed in the housing, the sensor element being configured to output a signal according to driving of a motor, the motor having a drive shaft, the drive shaft having first and second ends opposite to each other;
an arithmetic processor housed in the housing;
a motion history temporary buffer housed in the housing, and
a motion history memory housed in the housing, wherein
the arithmetic processor is configured to:
generate position information data containing a position of the motor acquired based on the signal output from the sensor element and a time when the position is acquired;
repeal processing of storing the generated position information data in the motion history temporary buffer several times; and
store the position information data stored in the motion history temporary buffer in the motion history memory when an abnormality is sensed or a signal reporting an abnormality is received from an external apparatus, and
the motor control angle sensor is disposed at the first end of the drive shaft of the motor, and a robot arm is disposed at the second end of the drive shaft of the motor.