Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Patent
1984-10-18
1987-02-17
Shoop, Jr., William M.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
318 51, 318 91, 318101, H02P 768
Patent
active
046442324
ABSTRACT:
The present invention provides method and apparatus to control a plurality of DC motors each having an encoder by a sole microcomputer. The actual rotating speed of each DC motor is detected in response to the signal from the encoder. A pulse width of a voltage which is applied to each motor is controlled due to the deviation between the actual speed and a preset speed. The output signals from the encoders regarding a specific DC motor to the other DC motor are sequentially selected by a selection signal, thereby controlling the speed measurements and calculations regarding a plurality of DC motors and the duties of electric powers which are applied to the DC motors.
REFERENCES:
patent: 4334175 (1982-06-01), Tanaka et al.
"A Microprocessor Speed Control System", IEEE Transactions on Industrial Electronics and Control Instrumentation, vol. 24, No. 3, pp. 241-247, Aug. 1977.
Inamura Junshiro
Ishida Giichi
Ishizaki Kosho
Nojiri Yuukou
Hitachi , Ltd.
Ro Bentsu
Shoop Jr. William M.
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