Drive unit and a motor drive control method

Details Drive unit and a motor drive control method Drive unit and a motor drive control method

1996-06-25

1998-01-06

Ip, Paul

Electricity: motive power systems

Positional servo systems

Plural servomotors

318 67, 318 34, 3185681, 318696, H02P 546, B41J 100

Patent

active

057059080

ABSTRACT:
A drive unit capable of maintaining the stability of driving speed with respect to the driven part in which the motor is not used at a low drive efficiency. Said drive unit comprises the first and second stepping motors 12 and 14 transmitting power to the driven part at a rated driving output corresponding to the load torque of said driven part, the first and second motor drive control units 15 and 16 supplying electric power to these first and second stepping motors 12 and 14 and controlling their drive, a temperature detection circuit 7 detecting the temperature of the heat generated by these first and second motor drive control units 15 and 16 and outputting temperature detection signals, and a system control circuit 3 switching the allocation of the main drive unit or the auxiliary drive unit based on the temperature detection signals outputted from the allocation and temperature detection circuit 7 allocating one of the first or second stepping motors 12 or 14 to serve as the main drive unit or the auxiliary drive unit when the detected temperature has exceeded the previously set reference temperature.

REFERENCES:
patent: 4136303 (1979-01-01), Almquist et al.
patent: 4225290 (1980-09-01), Allington
patent: 4918365 (1990-04-01), Tanuma et al.
patent: 4961037 (1990-10-01), Orii et al.
patent: 5528114 (1996-06-01), Tokizaki et al.

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