Abstract: A dual CPU inverter system includes a power module and a control module electrically connected to each other and each having a CPU, a RAM and a ROM. After power on, the two modules can read the respective ROM data to the respective RAM to speed up the ready state. When external IO intends to store command parameters, the dual CPU inverter system can judge which module is the destination for the command parameter and send the command parameter to the ROM respectively. Therefore, the communication load between the two modules can be reduced.

Abstract: The invention related to a three-in-one protection circuit against out-rush current, short circuits and overloading. A second power source connected to the output side of a transformer in a power supply is used as a power source when the protection function is activated. This is in order to provide the power source for a protection circuit when a short circuit happens at an output end. A current sensor connected to the output side of the transformer is used to sense the occurrence of an overload current and a timer is used to set the time that a specific out-rush current can be yielded to allow and limit the yielding of the out-rush current. Therefore, an executor for activating protection function can be used in the above-mentioned three-in-one protection circuit simultaneously at the same circuit.

Abstract: The invention related to a three-in-one protection circuit against out-rush current, short circuits and overloading. A second power source connected to the output side of a transformer in a power supply is used as a power source when the protection function is activated. This is in order to provide the power source for a protection circuit when a short circuit happens at an output end. A current sensor connected to the output side of the transformer is used to sense the occurrence of an overload current and a timer is used to set the time that a specific out-rush current can be yielded to allow and limit the yielding of the out-rush current. Therefore, an executor for activating protection function can be used in the above-mentioned three-in-one protection circuit simultaneously at the same circuit.