Protection circuit of drive system for motor

Details Protection circuit of drive system for motor Protection circuit of drive system for motor

1996-09-20

1998-09-08

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 31, H02H 300

Patent

active

058053964

ABSTRACT:
A grounded terminal of a motor driver for controlling an actuator motor is connected to a ground terminal of a control unit through a grounded wire, and therefore connected to a grounded point. Since a ground wire of the stabilized power supply circuit is connected to the ground wire of the control unit, the stabilized power-supply circuit also has its ground connected with the grounded point disposed outside the control unit. A cut-wire avoidance diode is connected between the ground wire of the stabilized power supply circuit and a power transistor unit in a manner such that its cathode is connected to the power transistor unit, which enables the stabilized power-supply circuit to remain grounded even when the control unit is disconnected from the grounded point.

REFERENCES:
patent: 4725912 (1988-02-01), Wrathall
patent: 5166852 (1992-11-01), Sano

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