CONSTANT-SPEED CONTROLLER

• Main Authors: KOBAYASHI MIKIO, NISHIDA TORU, TERUI HIROSHI, ARAKI KUNIHIKO
• Format: Patent
• Language: English
• Published: 06.06.1988
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; ELECTROGRAPHY; GENERATION; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS

PURPOSE:To prevent the operation timing from being displaced or the position controlling accuracy from decreasing by controlling the exciting time of a motor so that the counterelectromotive force of the motor at the time of deenergizing the motor becomes constant. CONSTITUTION:A microprocessor unit (MPU) 11 controls a motor 14 and a combination solenoid 21 through a motor driver 12 and a combination solenoid driver 20 on the basis of the signal inputs from an analog/digital converter 16, a timing switch 18, and a phase sensor 19. The driver 12 drives the motor 14 while turning ON, OFF a power source 13 by a command from the MPU 11. The MPU 11 samples the terminal voltage Vm when the motor is OFF through the converter 16, and controls the duty of a command signal to the driver 12 so that the value of the counterelectromove force becomes constant.