H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/103, 318/93
H02P 7/288 (2006.01) H02P 23/00 (2006.01)
Patent
CA 1085912
SYSTEM FOR CONTROLLING ROTATIONS OF A DC MOTOR ABSTRACT OF THE DISCLOSURE A system for controlling the rotation of a direct cur- rent motor having an armature resistance comprises an operational amplifier having one input terminal connected to the direct cur- rent motor and the other input terminal and constituting a differ- ential amplifier, a first resistor connected between an output terminal of the operational amplifier and the one of the input terminals, a second resistor connected between the other input terminal of the operational amplifier and a terminal for applica- tion thereto of a control signal voltage, a third resistor con- nected between said output terminal of the operational amplifier and the other input terminal, a circuit for detecting the rota- tional phase of a rotary structure driven in rotation by the direct current motor and accordingly producing as output a phase detection signal, a circuit for supplying a reference signal, and a phase comparing circuit for comparing said phase detection signal and said reference signal and applying the resulting out- put phase comparison error signal thereof to said terminal for application thereto of a control signal voltage. The armature resistance and the first, second, and third resistors are so connected as to constitute essentially a bridge circuit.
284906
Hiraguri Seisuke
Kosaka Yositeru
Marks & Clerk
Victor Company Of Japan Ltd.
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