Generation of width modulated pulses by relatively adjusting ris

Details Generation of width modulated pulses by relatively adjusting ris Generation of width modulated pulses by relatively adjusting ris

1991-02-01

1995-05-23

Kim, Ken S.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318811, 363 41, 36443104, 36447412, 364486, 327172, H03K 3017

Patent

active

054189322

ABSTRACT:
A pulse generating device according to the present invention is operated in accordance with a pulse control command including output time data about output pulse given from external equipment such as a CPU. The pulse control command including the output time data about the output pulses is transferred to a master memory of a contents addressable memory at an optional timing from outside. The contents of that master memory are copied to a slave memory in response to copy enable signals transmitted from a copy enable device. The copy enable signals are transmitted whenever a predetermined number synchronizing signals showing an end of the pulse period are generated from the interval timer. The contents addressable memory reads out the output control command of the output pulse from a slave memory when the timer value of the interval timer coincides with the time data of the slave memory. The output control circuit transmits output pulses which correspond to the control command read out as described above. As a result, if the output time data is reloaded at an optional timing from outside, the generation of an error in the pulse width of the output pulse can be prevented. Furthermore, the load of the CPU can be reduced.

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patent: 5184310 (1993-02-01), Takenouchi
Morinaga, S. "Microprocessor Control System with I/O Processing Unit LSI for Motor Drive PWM Inverter" IEEE Transactions on Industry Applications vol. 1A-20 No. 6, pp. 1547-1553 1984.

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