Microcomputer with motor controller circuit
Patent 5013985 Issued on May 7, 1991. Estimated Expiration Date: 
April 25, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 25, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBi-directional motor drive servo Direct digital technique for generating an AC waveform Servomotor controller Brushless permanent magnet motor system Electrical arrangement for driving a rotary tool fitted in a handpiece Patent #: 4760317 InventorsApplicationNo. 514390 filed on 04/25/1990US Classes:318/558, MISCELLANEOUS318/254, SELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORS318/599Pulse-width modulated power input to motor (e.g., "duty cycle" systems)ExaminersPrimary: Ro, BentsuAttorney, Agent or FirmInternational ClassesH02P 006/02H02M 007/48 Foreign Application Priority Data1989-08-03 JPAbstractA microcomputer with a motor controller circuit includes a motor controller circuit (4) which has NAND circuits (8) for producing a logical product of a rise pulse from a rise pulse generator (5) and a start level from a register (7) and flip-flop circuits (9a-9b) each responsive to start level set signals from the NAND circuits and an output pulse from a three-phase inverter waveform generator timer (6a-6b) to generate three-phase inverter waveforms. | |
