Abstract: A power generator system includes a field winding, an alternator, a voltage regulator and a generator exciter device. The field winding generates a magnetic field based on a total excitation voltage thereacross. The alternator generates an output voltage based on the magnetic field. The voltage regulator generates a primary excitation voltage based on the output voltage. The generator exciter device generates an auxiliary excitation voltage. The generator exciter device and the voltage regulator are coupled in series across the field winding, so that the auxiliary excitation voltage and the primary excitation voltage are summed into the total excitation voltage which is not less than the primary excitation voltage in magnitude.

Abstract: A transfer switch has a mounting seat, and a main no-fuse circuit breaker, an auxiliary no-fuse circuit breaker, a switching control assembly, and a transmission mechanism mounted on the mounting seat. The switching control assembly selectively switches the main no-fuse circuit breaker and the auxiliary no-fuse circuit breaker. The transmission mechanism has a main transmission set and an auxiliary transmission set. When the switching control assembly is switched to form electrical conduction of the main no-fuse circuit breaker, the main transmission set drives the auxiliary transmission set via a transmission rod to prevent electrical conduction of the auxiliary no-fuse circuit breaker from forming. Likewise, when the electrical conduction of the auxiliary no-fuse circuit breaker is formed, the electrical conduction of the main no-fuse circuit breaker cannot be formed. Accordingly, safety of the transfer switch can be improved when switching between power sources.

Abstract: An armature winding switch module has a first connection set, a second connection set and a third connection set. The first, the second and the third connection set are respectively connected between a neutral point and a corresponding phase line point and have terminals and contacts. Each two terminals of each connection set are respectively connected to two ends of a corresponding armature winding of a power supply device. The contacts of each connection set are connected among the corresponding terminals. Selectively turning on/off the contacts can connect the armature windings of each connection set in series or in parallel and thereby output required voltage without redoing wiring work. Therefore the present invention avoids second time complicated wiring work and possible connection faults.

Abstract: An armature winding switch module has a first connection set, a second connection set and a third connection set. The first, the second and the third connection set are respectively connected between a neutral point and a corresponding phase line point and have terminals and contacts. Each two terminals of each connection set are respectively connected to two ends of a corresponding armature winding of a power supply device. The contacts of each connection set are connected among the corresponding terminals. Selectively turning on/off the contacts can connect the armature windings of each connection set in series or in parallel and thereby output required voltage without redoing wiring work. Therefore the present invention avoids second time complicated wiring work and possible connection faults.

Abstract: A switching device for a transfer switch has a pivotal body, a solenoid, a resilient pushing device and a main spring. The pivotal body has a pivotal axis, a first recess, a second recess and a connecting axis. The first and second recesses are defined adjacent to each other. The connecting axis is defined between the first and second recesses. The solenoid is connected to the pivotal body with a lever and has a driving shaft with a center line. The main spring has a connecting end being connected to the pivotal body at a point on the connecting axis. The lever has a center line. The connecting end of the main spring connected to the connecting axis is offset to the center line of the lever when the center line of the lever aligns with the center line of the driving shaft.