Driver for target switching element and control system for machine using the same

摘要

In a driver having a reference point with a reference potential for driving a target switching element having an on-off control terminal, a charging path electrically connects the on-off control terminal of the target switching element and a driving power source for charging the on-off control terminal of the target switching element. A bypass path electrically connects the on-off control terminal of the target switching element and the driving power source. A storage has a first conductive end electrically connected to the bypass path and a second conductive end electrically connected to the reference point of the target switching element, and is configured for storing therein charge sent through the bypass path.

主权项

1. A driver for a target switching element, the driver comprising:
a charging path, connecting an on-off control terminal of a target switching element and a driving power source, for charging the on-off control terminal of the target switching element; a bypass path connecting the on-off control terminal of the target switching element and the driving power source; a storage means having one end connected to the bypass path and the other end connected to a portion of the driving power source, the storage means being configured to store therein charge, the portion of the driving power source having a reference potential different from an output potential of the driving power source; a connection switching element provided on the bypass path and configured to turn on or off the bypath path; a connection driving means that turns on the connection switching element when the target switching element is in a full on state; and a charge-discharge driving means that:
performs a charging task that charges the on-off control terminal via the charging path to switch the target switching element to be in the fill on state upon determining that a drive signal for driving the target switching element is turned to an on command; andperforms a discharging task that discharges the on-off control terminal to switch the target switching element to be in an off state upon determining that the drive signal is turned to an off command, wherein the connection driving means is configured to:
turn on the connection switching element when determining that the drive signal is the on command and the target switching element is in the full on state; andturn off the connection switching element when determining that the drive signal is the off command or determining that the drive signal is the on command and the target switching element is not in the full on state.