Discharge control device
View Patent ↗A discharge control device includes a discharge circuit configured to include a switch and a resistor to discharge charges of a smoothing capacitor and a power converter which are connected to a high-voltage power supply. The discharge circuit sets the switch to an ON state to start the discharging for a fixed period when an ignition switch is changed from the ON state to an OFF state. The discharge circuit sets the switch to the OFF state to stop the discharging when the ignition switch is changed from the OFF state to the ON state during a period in which the discharge circuit performs the discharging.
1. A discharge control device comprising:
a discharge circuit configured to include a switch and a resistor to discharge charges of a smoothing capacitor and a power converter which are connected to a high-voltage power supply, wherein the discharge circuit is configured to further include at least one flip-flop circuit,
wherein the flip-flop circuit outputs a signal for setting the switch of the discharge circuit to the ON state for the fixed period when the ignition switch is changed from the ON state to the OFF state, and
wherein the flip-flop circuit is reset to stop outputting the signal for setting the switch of the discharge circuit to the ON state for the fixed period when the ignition switch is changed from the OFF state to the ON state during the period in which the discharge circuit performs the discharging.
2. The discharge control device according to claim 1 ,
wherein the discharge circuit is configured to further include a reset circuit, and
wherein the reset circuit outputs a reset signal to the flip-flop circuit when the ignition switch is changed from the OFF state to the ON state during the period in which the discharge circuit performs the discharging.
3. The discharge control device according to claim 2 ,
wherein the discharge circuit is configured to further include a differentiation circuit,
wherein the differentiation circuit differentiates a signal indicating the OFF state and the ON state in the ignition switch, and
wherein the reset circuit outputs the reset signal to the flip-flop circuit when the differentiated signal indicates that the ignition switch is changed from the OFF state to the ON state during the period in which the discharge circuit performs the discharging.