Control apparatus for DC/DC converter

A control apparatus for controlling a DC/DC converter having switching devices, the DC/DC converter transferring electric power to a first electric power supply from a second electric power supply, the control apparatus comprising:

• a control circuit arranged on a side of the DC/DC converter having the first electric power supply;
• a gate drive circuit having a plurality of driving transformers;
• and
• a voltage monitor, the voltage monitor monitoring the voltage of the second electric power supply, wherein
• the control circuit driving primary sides of the respective driving transformers and, to induce voltages on secondary sides of the respective driving transformers, the driving transformers driving the respective switching devices arranged on a side of the DC/DC converter having the second electric power supply, isolated from the control circuit, with the induced voltages,
• the voltage monitor outputting a signal for short-circuiting the secondary side of one of the driving transformers when the voltage of the second electric power supply is outside a predetermined range, making a substantially large current flow on the primary side of the one of the driving transformers, the secondary side thereof being short-circuited;
• the control circuit detecting the substantially large current flowing on the primary side of the one of the driving transformers to detect the voltage of the second electric power supply outside the predetermined range on a side of the DC/DC converter having the control circuit.

A control apparatus for controlling a DC/DC converter having switching devices, the DC/DC converter transferring electric power to a first electric power supply from a second electric power supply, the control apparatus comprising:

• a control circuit arranged on a side of the DC/DC converter having the first electric power supply;
• a gate drive circuit having a plurality of driving transformers;
• and
• a voltage monitor, the voltage monitor monitoring the voltage of the second electric power supply, wherein
• the control circuit driving primary sides of the respective driving transformers and, to induce voltages on secondary sides of the respective driving transformers, the driving transformers driving the respective switching devices arranged on a side of the DC/DC converter having the second electric power supply, isolated from the control circuit, with the induced voltages,
• the voltage monitor outputting a signal for short-circuiting the secondary sides of the respective driving transformers when the voltage of the second electric power supply is outside a predetermined range, making substantially large currents flow on the primary sides of the respective driving transformers, the secondary sides thereof being short circuited, and
• the control circuit detecting the substantially large current flowing on the primary side of one of the driving transformers to detect the voltage of the second electric power supply outside the predetermined range on a side of the DC/DC converter having the control circuit.