Patent ID: 8432715
Filing Date: 2013-04-30
Classification: B60L,H02M

Abstract:
1. A control apparatus for a power conversion circuit in which a power storage means is parallel-connected with a series connection of a high-side switching element and a low-side switching element, including a discharge control means for controlling a charged voltage of the power storage means below a specified voltage, each of the switching elements being a voltage-controlled type switching element, a conduction control terminal of each of the switching elements being connected with an over current protection circuit that turns off the switching element when a current flowing between an input terminal and an output terminal of the switching element exceeds a threshold current, the discharge control means being configured to perform a process to produce a short-circuit state of both electrodes of the power storage means a plurality of times by turning both the high-side switching element and the low-side switching element to on state by repeating on-state and off-state for one of the high-side switching element and the low-side switching element a plurality of times during a period in which the charged voltage is controlled below the specified voltage while keeping the other of the high-side switching element and the low-side switching element at on state, and to set a voltage applied to the conduction control terminal of at least one of the high-side switching element and the low-side switching element to a value at which a saturation current becomes smaller than the threshold current at the time of performing the short-circuit state producing process.