Drive circuit for pulse synchronized motor
AssigneeNippon Kogaku K.K.
InventorOsamu Maida
Life of this patent
Estimating the term…
Abstract
A drive circuit for pulse synchronized motor has a circuit for generating an output signal corresponding to the frequency of synchronizing pulse signals and a voltage setting circuit for automatically setting, according to the output of the output circuit, the voltage to be applied to the motor within a synchronizable voltage range of frequency of the synchronizing pulse signals for synchronizing the motor. The drive circuit is capable of automatically maintaining synchronized state over a wide frequency range.
Claims17
A drive circuit for a pulse synchronized motor for controlling the rotational speed of the motor in response to a synchronizing pulse signal instructing the rotational speed of the motor, comprising:
- a circuit for detecting the rotational speed of the motor and for generating a periodic pulse signal proportional thereto;
- a circuit responsive to the synchronizing pulse signal for automatically producing in accordance with the frequency of the synchronizing pulse signal a DC voltage applied to the motor having a voltage value at which the motor can be in synchronization with the rotational speed instructed by the synchronizing pulse signal;
- and
- a bistable circuit for interrupting application of said voltage to the motor, the bistable circuit being placed in one of its states by the synchronizing pulse signal and being placed in its other state by the motor speed pulse signal.
Dependencies are inferred from the claim text.